[AArch64, 5/6] Enable BTI : Add new pass for BTI.

[gcc.git] / gcc / testsuite / lib / target-supports.exp

#   Copyright (C) 1999-2019 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GCC; see the file COPYING3.  If not see
# <http://www.gnu.org/licenses/>.

# Please email any bugs, comments, and/or additions to this file to:
# gcc-patches@gcc.gnu.org

# This file defines procs for determining features supported by the target.

# Try to compile the code given by CONTENTS into an output file of
# type TYPE, where TYPE is as for target_compile.  Return a list
# whose first element contains the compiler messages and whose
# second element is the name of the output file.
#
# BASENAME is a prefix to use for source and output files.
# If ARGS is not empty, its first element is a string that
# should be added to the command line.
#
# Assume by default that CONTENTS is C code.  
# Otherwise, code should contain:
# "// C++" for c++,
# "// D" for D,
# "! Fortran" for Fortran code,
# "/* ObjC", for ObjC
# "// ObjC++" for ObjC++
# and "// Go" for Go
# If the tool is ObjC/ObjC++ then we overide the extension to .m/.mm to 
# allow for ObjC/ObjC++ specific flags.

proc check_compile {basename type contents args} {
    global tool
    verbose "check_compile tool: $tool for $basename" 

    # Save additional_sources to avoid compiling testsuite's sources
    # against check_compile's source.
    global additional_sources
    if [info exists additional_sources] {
        set tmp_additional_sources "$additional_sources"
        set additional_sources ""
    }

    if { [llength $args] > 0 } {
        set options [list "additional_flags=[lindex $args 0]"]
    } else {
        set options ""
    }
    switch -glob -- $contents {
        "*! Fortran*" { set src ${basename}[pid].f90 }
        "*// C++*" { set src ${basename}[pid].cc }
        "*// D*" { set src ${basename}[pid].d }
        "*// ObjC++*" { set src ${basename}[pid].mm }
        "*/* ObjC*" { set src ${basename}[pid].m }
        "*// Go*" { set src ${basename}[pid].go }
        default {
            switch -- $tool {
                "objc" { set src ${basename}[pid].m }
                "obj-c++" { set src ${basename}[pid].mm }
                default { set src ${basename}[pid].c }
            }
        }
    }

    set compile_type $type
    switch -glob $type {
        assembly { set output ${basename}[pid].s }
        object { set output ${basename}[pid].o }
        executable { set output ${basename}[pid].exe }
        "rtl-*" {
            set output ${basename}[pid].s
            lappend options "additional_flags=-fdump-$type"
            set compile_type assembly
        }
    }
    set f [open $src "w"]
    puts $f $contents
    close $f
    set lines [${tool}_target_compile $src $output $compile_type "$options"]
    file delete $src

    set scan_output $output
    # Don't try folding this into the switch above; calling "glob" before the
    # file is created won't work.
    if [regexp "rtl-(.*)" $type dummy rtl_type] {
        set scan_output "[glob $src.\[0-9\]\[0-9\]\[0-9\]r.$rtl_type]"
        file delete $output
    }

    # Restore additional_sources.
    if [info exists additional_sources] {
        set additional_sources "$tmp_additional_sources"
    }

    return [list $lines $scan_output]
}

proc current_target_name { } {
    global target_info
    if [info exists target_info(target,name)] {
        set answer $target_info(target,name)
    } else {
        set answer ""
    }
    return $answer
}

# Implement an effective-target check for property PROP by invoking
# the Tcl command ARGS and seeing if it returns true.

proc check_cached_effective_target { prop args } {
    global et_cache

    set target [current_target_name]
    if {![info exists et_cache($prop,$target)]} {
        verbose "check_cached_effective_target $prop: checking $target" 2
        if {[string is true -strict $args] || [string is false -strict $args]} {
            error {check_cached_effective_target condition already evaluated; did you pass [...] instead of the expected {...}?}
        } else {
            set code [catch {uplevel eval $args} result]
            if {$code != 0 && $code != 2} {
                return -code $code $result
            }
            set et_cache($prop,$target) $result
        }
    }
    set value $et_cache($prop,$target)
    verbose "check_cached_effective_target $prop: returning $value for $target" 2
    return $value
}

# Implements a version of check_cached_effective_target that also takes et_index
# into account when creating the key for the cache.
proc check_cached_effective_target_indexed { prop args } {
    global et_index
    set key "$et_index $prop"
    verbose "check_cached_effective_target_index $prop: returning $key" 2

    return [check_cached_effective_target $key [list uplevel eval $args]]
}

# Clear effective-target cache. This is useful after testing
# effective-target features and overriding TEST_ALWAYS_FLAGS and/or
# ALWAYS_CXXFLAGS.
# If one changes ALWAYS_CXXFLAGS or TEST_ALWAYS_FLAGS then they should
# do a clear_effective_target_cache at the end as the target cache can
# make decisions based upon the flags, and those decisions need to be
# redone when the flags change. An example of this is the
# asan_init/asan_finish pair.

proc clear_effective_target_cache { } {
    global et_cache
    array unset et_cache
}

# Like check_compile, but delete the output file and return true if the
# compiler printed no messages.
proc check_no_compiler_messages_nocache {args} {
    set result [eval check_compile $args]
    set lines [lindex $result 0]
    set output [lindex $result 1]
    remote_file build delete $output
    return [string match "" $lines]
}

# Like check_no_compiler_messages_nocache, but cache the result.
# PROP is the property we're checking, and doubles as a prefix for
# temporary filenames.
proc check_no_compiler_messages {prop args} {
    return [check_cached_effective_target $prop {
        eval [list check_no_compiler_messages_nocache $prop] $args
    }]
}

# Like check_compile, but return true if the compiler printed no
# messages and if the contents of the output file satisfy PATTERN.
# If PATTERN has the form "!REGEXP", the contents satisfy it if they
# don't match regular expression REGEXP, otherwise they satisfy it
# if they do match regular expression PATTERN.  (PATTERN can start
# with something like "[!]" if the regular expression needs to match
# "!" as the first character.)
#
# Delete the output file before returning.  The other arguments are
# as for check_compile.
proc check_no_messages_and_pattern_nocache {basename pattern args} {
    global tool

    set result [eval [list check_compile $basename] $args]
    set lines [lindex $result 0]
    set output [lindex $result 1]

    set ok 0
    if { [string match "" $lines] } {
        set chan [open "$output"]
        set invert [regexp {^!(.*)} $pattern dummy pattern]
        set ok [expr { [regexp $pattern [read $chan]] != $invert }]
        close $chan
    }

    remote_file build delete $output
    return $ok
}

# Like check_no_messages_and_pattern_nocache, but cache the result.
# PROP is the property we're checking, and doubles as a prefix for
# temporary filenames.
proc check_no_messages_and_pattern {prop pattern args} {
    return [check_cached_effective_target $prop {
        eval [list check_no_messages_and_pattern_nocache $prop $pattern] $args
    }]
}

# Try to compile and run an executable from code CONTENTS.  Return true
# if the compiler reports no messages and if execution "passes" in the
# usual DejaGNU sense.  The arguments are as for check_compile, with
# TYPE implicitly being "executable".
proc check_runtime_nocache {basename contents args} {
    global tool

    set result [eval [list check_compile $basename executable $contents] $args]
    set lines [lindex $result 0]
    set output [lindex $result 1]

    set ok 0
    if { [string match "" $lines] } {
        # No error messages, everything is OK.
        set result [remote_load target "./$output" "" ""]
        set status [lindex $result 0]
        verbose "check_runtime_nocache $basename: status is <$status>" 2
        if { $status == "pass" } {
            set ok 1
        }
    }
    remote_file build delete $output
    return $ok
}

# Like check_runtime_nocache, but cache the result.  PROP is the
# property we're checking, and doubles as a prefix for temporary
# filenames.
proc check_runtime {prop args} {
    global tool

    return [check_cached_effective_target $prop {
        eval [list check_runtime_nocache $prop] $args
    }]
}

# Return 1 if GCC was configured with $pattern.
proc check_configured_with { pattern } {
    global tool

    set gcc_output [${tool}_target_compile "-v" "" "none" ""]
    if { [ regexp "Configured with: \[^\n\]*$pattern" $gcc_output ] } {
        verbose "Matched: $pattern" 2
        return 1
    }

    verbose "Failed to match: $pattern" 2
    return 0
}

###############################
# proc check_weak_available { }
###############################

# weak symbols are only supported in some configs/object formats
# this proc returns 1 if they're supported, 0 if they're not, or -1 if unsure

proc check_weak_available { } {
    global target_cpu

    # All mips targets should support it

    if { [ string first "mips" $target_cpu ] >= 0 } {
        return 1
    }

    # All AIX targets should support it

    if { [istarget *-*-aix*] } {
        return 1
    }

    # All solaris2 targets should support it

    if { [istarget *-*-solaris2*] } {
        return 1
    }

    # Windows targets Cygwin and MingW32 support it

    if { [istarget *-*-cygwin*] || [istarget *-*-mingw*] } {
        return 1
    }

    # HP-UX 10.X doesn't support it

    if { [istarget hppa*-*-hpux10*] } {
        return 0
    }

    # nvptx (nearly) supports it

    if { [istarget nvptx-*-*] } {
        return 1
    }

    # pdp11 doesn't support it

    if { [istarget pdp11*-*-*] } {
        return 0
    }

    # ELF and ECOFF support it. a.out does with gas/gld but may also with
    # other linkers, so we should try it

    set objformat [gcc_target_object_format]

    switch $objformat {
        elf      { return 1 }
        ecoff    { return 1 }
        a.out    { return 1 }
        mach-o   { return 1 }
        som      { return 1 }
        unknown  { return -1 }
        default  { return 0 }
    }
}

# return 1 if weak undefined symbols are supported.

proc check_effective_target_weak_undefined { } {
    return [check_runtime weak_undefined {
        extern void foo () __attribute__((weak));
        int main (void) { if (foo) return 1; return 0; }
    } ""]
}

###############################
# proc check_weak_override_available { }
###############################

# Like check_weak_available, but return 0 if weak symbol definitions
# cannot be overridden.

proc check_weak_override_available { } {
    if { [istarget *-*-mingw*] } {
        return 0
    }
    return [check_weak_available]
}

###############################
# proc check_visibility_available { what_kind }
###############################

# The visibility attribute is only support in some object formats
# This proc returns 1 if it is supported, 0 if not.
# The argument is the kind of visibility, default/protected/hidden/internal.

proc check_visibility_available { what_kind } {
    if [string match "" $what_kind] { set what_kind "hidden" }

    return [check_no_compiler_messages visibility_available_$what_kind object "
        void f() __attribute__((visibility(\"$what_kind\")));
        void f() {}
    "]
}

###############################
# proc check_alias_available { }
###############################

# Determine if the target toolchain supports the alias attribute.

# Returns 2 if the target supports aliases.  Returns 1 if the target
# only supports weak aliased.  Returns 0 if the target does not
# support aliases at all.  Returns -1 if support for aliases could not
# be determined.

proc check_alias_available { } {
    global tool

    return [check_cached_effective_target alias_available {
        set src alias[pid].c
        set obj alias[pid].o
        verbose "check_alias_available  compiling testfile $src" 2
        set f [open $src "w"]
        # Compile a small test program.  The definition of "g" is
        # necessary to keep the Solaris assembler from complaining
        # about the program.
        puts $f "#ifdef __cplusplus\nextern \"C\"\n#endif\n"
        puts $f "void g() {} void f() __attribute__((alias(\"g\")));"
        close $f
        set lines [${tool}_target_compile $src $obj object ""]
        file delete $src
        remote_file build delete $obj

        if [string match "" $lines] then {
            # No error messages, everything is OK.
            return 2
        } else {
            if [regexp "alias definitions not supported" $lines] {
                verbose "check_alias_available  target does not support aliases" 2

                set objformat [gcc_target_object_format]

                if { $objformat == "elf" } {
                    verbose "check_alias_available  but target uses ELF format, so it ought to" 2
                    return -1
                } else {
                    return 0
                }
            } else {
                if [regexp "only weak aliases are supported" $lines] {
                verbose "check_alias_available  target supports only weak aliases" 2
                    return 1
                } else {
                    return -1
                }
            }
        }
    }]
}

# Returns 1 if the target toolchain supports strong aliases, 0 otherwise.

proc check_effective_target_alias { } {
    if { [check_alias_available] < 2 } {
        return 0
    } else {
        return 1
    }
}

# Returns 1 if the target toolchain supports ifunc, 0 otherwise.

proc check_ifunc_available { } {
    return [check_no_compiler_messages ifunc_available object {
        #ifdef __cplusplus
        extern "C" {
        #endif
        extern void f_ ();
        typedef void F (void);
        F* g (void) { return &f_; }     
        void f () __attribute__ ((ifunc ("g")));
        #ifdef __cplusplus
        }
        #endif
    }]
}

# Returns true if --gc-sections is supported on the target.

proc check_gc_sections_available { } {
    global tool

    return [check_cached_effective_target gc_sections_available {
        # Some targets don't support gc-sections despite whatever's
        # advertised by ld's options.
        if { [istarget alpha*-*-*]
             || [istarget ia64-*-*] } {
            return 0
        }

        # elf2flt uses -q (--emit-relocs), which is incompatible with
        # --gc-sections.
        if { [board_info target exists ldflags]
             && [regexp " -elf2flt\[ =\]" " [board_info target ldflags] "] } {
            return 0
        }

        # VxWorks kernel modules are relocatable objects linked with -r,
        # while RTP executables are linked with -q (--emit-relocs).
        # Both of these options are incompatible with --gc-sections.
        if { [istarget *-*-vxworks*] } {
            return 0
        }

        # Check if the ld used by gcc supports --gc-sections.
        set gcc_ld [lindex [${tool}_target_compile "-print-prog-name=ld" "" "none" ""] 0]
        set ld_output [remote_exec host "$gcc_ld" "--help"]
        if { [ string first "--gc-sections" $ld_output ] >= 0 } {
            return 1
        } else {
            return 0
        }
    }]
}

# Return 1 if according to target_info struct and explicit target list
# target is supposed to support trampolines.
 
proc check_effective_target_trampolines { } {
    if [target_info exists gcc,no_trampolines] {
      return 0
    }
    if { [istarget avr-*-*]
         || [istarget msp430-*-*]
         || [istarget nvptx-*-*]
         || [istarget hppa2.0w-hp-hpux11.23]
         || [istarget hppa64-hp-hpux11.23] } {
        return 0;
    }
    return 1
}

# Return 1 if target has limited stack size.

proc check_effective_target_stack_size { } {
    if [target_info exists gcc,stack_size] {
        return 1
    }
    return 0
}

# Return the value attribute of an effective target, otherwise return 0.

proc dg-effective-target-value { effective_target } {
    if { "$effective_target" == "stack_size" } {
        if [check_effective_target_stack_size] {
            return [target_info gcc,stack_size]
        }
    }

    return 0
}

# Return 1 if signal.h is supported.

proc check_effective_target_signal { } {
    if [target_info exists gcc,signal_suppress] {
      return 0
    }
    return 1
}

# Return 1 if according to target_info struct and explicit target list
# target disables -fdelete-null-pointer-checks.  Targets should return 0
# if they simply default to -fno-delete-null-pointer-checks but obey
# -fdelete-null-pointer-checks when passed explicitly (and tests that 
# depend on this option should do that).

proc check_effective_target_keeps_null_pointer_checks { } {
    if [target_info exists keeps_null_pointer_checks] {
      return 1
    }
    if { [istarget msp430-*-*] } {
        return 1;   
    }
    return 0
}

# Return the autofdo profile wrapper

# Linux by default allows 516KB of perf event buffers
# in /proc/sys/kernel/perf_event_mlock_kb
# Each individual perf tries to grab it
# This causes problems with parallel test suite runs. Instead
# limit us to 8 pages (32K), which should be good enough
# for the small test programs. With the default settings 
# this allows parallelism of 16 and higher of parallel gcc-auto-profile
proc profopt-perf-wrapper { } {
    global srcdir
    return "$srcdir/../config/i386/gcc-auto-profile -o perf.data -m8 "
}

# Return true if profiling is supported on the target.

proc check_profiling_available { test_what } {
    verbose "Profiling argument is <$test_what>" 1

    # These conditions depend on the argument so examine them before
    # looking at the cache variable.

    # Tree profiling requires TLS runtime support.
    if { $test_what == "-fprofile-generate" } {
        if { ![check_effective_target_tls_runtime] } {
            return 0
        }
    }

    if { $test_what == "-fauto-profile" } {
        if { !([istarget i?86-*-linux*] || [istarget x86_64-*-linux*]) } {
            verbose "autofdo only supported on linux"
            return 0
        }
        # not cross compiling?
        if { ![isnative] } {
            verbose "autofdo not supported for non native builds"
            return 0
        }
        set event [profopt-perf-wrapper]
        if {$event == "" } {
            verbose "autofdo not supported"
            return 0
        }
        global srcdir
        set status [remote_exec host "$srcdir/../config/i386/gcc-auto-profile" "true -v >/dev/null"]
        if { [lindex $status 0] != 0 } {
            verbose "autofdo not supported because perf does not work"
            return 0
        }

        # no good way to check this in advance -- check later instead.
        #set status [remote_exec host "create_gcov" "2>/dev/null"]
        #if { [lindex $status 0] != 255 } {
        #    verbose "autofdo not supported due to missing create_gcov"
        #    return 0
        #}
    }

    # Support for -p on solaris2 relies on mcrt1.o which comes with the
    # vendor compiler.  We cannot reliably predict the directory where the
    # vendor compiler (and thus mcrt1.o) is installed so we can't
    # necessarily find mcrt1.o even if we have it.
    if { [istarget *-*-solaris2*] && $test_what == "-p" } {
        return 0
    }

    # We don't yet support profiling for MIPS16.
    if { [istarget mips*-*-*]
         && ![check_effective_target_nomips16]
         && ($test_what == "-p" || $test_what == "-pg") } {
        return 0
    }

    # MinGW does not support -p.
    if { [istarget *-*-mingw*] && $test_what == "-p" } {
        return 0
    }

    # cygwin does not support -p.
    if { [istarget *-*-cygwin*] && $test_what == "-p" } {
        return 0
    }

    # uClibc does not have gcrt1.o.
    if { [check_effective_target_uclibc]
         && ($test_what == "-p" || $test_what == "-pg") } {
        return 0
    }

    # Now examine the cache variable.
    set profiling_working \
       [check_cached_effective_target profiling_available {
        # Some targets don't have any implementation of __bb_init_func or are
        # missing other needed machinery.
        if {[istarget aarch64*-*-elf]
             || [istarget am3*-*-linux*]
             || [istarget arm*-*-eabi*]
             || [istarget arm*-*-elf]
             || [istarget arm*-*-symbianelf*]
             || [istarget avr-*-*]
             || [istarget bfin-*-*]
             || [istarget cris-*-*]
             || [istarget crisv32-*-*]
             || [istarget csky-*-elf]
             || [istarget fido-*-elf]
             || [istarget h8300-*-*]
             || [istarget lm32-*-*]
             || [istarget m32c-*-elf]
             || [istarget m68k-*-elf]
             || [istarget m68k-*-uclinux*]
             || [istarget mips*-*-elf*]
             || [istarget mmix-*-*]
             || [istarget mn10300-*-elf*]
             || [istarget moxie-*-elf*]
             || [istarget msp430-*-*]
             || [istarget nds32*-*-elf]
             || [istarget nios2-*-elf]
             || [istarget nvptx-*-*]
             || [istarget powerpc-*-eabi*]
             || [istarget powerpc-*-elf]
             || [istarget rx-*-*]       
             || [istarget tic6x-*-elf]
             || [istarget visium-*-*]
             || [istarget xstormy16-*]
             || [istarget xtensa*-*-elf]
             || [istarget *-*-rtems*]
             || [istarget *-*-vxworks*] } {
            return 0
        } else {
            return 1
        }
    }]

    # -pg link test result can't be cached since it may change between
    # runs.
    if { $profiling_working == 1
         && ![check_no_compiler_messages_nocache profiling executable {
              int main() { return 0; } } "-pg"] } {
        set profiling_working 0
    }

    return $profiling_working
}

# Check to see if a target is "freestanding". This is as per the definition
# in Section 4 of C99 standard. Effectively, it is a target which supports no
# extra headers or libraries other than what is considered essential.
proc check_effective_target_freestanding { } {
    if { [istarget nvptx-*-*] } {
        return 1
    }
    return 0
}

# Return 1 if target has packed layout of structure members by
# default, 0 otherwise.  Note that this is slightly different than
# whether the target has "natural alignment": both attributes may be
# false.

proc check_effective_target_default_packed { } {
    return [check_no_compiler_messages default_packed assembly {
        struct x { char a; long b; } c;
        int s[sizeof (c) == sizeof (char) + sizeof (long) ? 1 : -1];
    }]
}

# Return 1 if target has PCC_BITFIELD_TYPE_MATTERS defined.  See
# documentation, where the test also comes from.

proc check_effective_target_pcc_bitfield_type_matters { } {
    # PCC_BITFIELD_TYPE_MATTERS isn't just about unnamed or empty
    # bitfields, but let's stick to the example code from the docs.
    return [check_no_compiler_messages pcc_bitfield_type_matters assembly {
        struct foo1 { char x; char :0; char y; };
        struct foo2 { char x; int :0; char y; };
        int s[sizeof (struct foo1) != sizeof (struct foo2) ? 1 : -1];
    }]
}

# Add to FLAGS all the target-specific flags needed to use thread-local storage.

proc add_options_for_tls { flags } {
    # On Solaris 9, __tls_get_addr/___tls_get_addr only lives in
    # libthread, so always pass -pthread for native TLS. Same for AIX.
    # Need to duplicate native TLS check from
    # check_effective_target_tls_native to avoid recursion.
    if { ([istarget powerpc-ibm-aix*]) &&
         [check_no_messages_and_pattern tls_native "!emutls" assembly {
             __thread int i;
             int f (void) { return i; }
             void g (int j) { i = j; }
         }] } {
        return "-pthread [g++_link_flags [get_multilibs "-pthread"] ] $flags "
    }
    return $flags
}

# Return 1 if indirect jumps are supported, 0 otherwise.

proc check_effective_target_indirect_jumps {} {
    if { [istarget nvptx-*-*] } {
        return 0
    }
    return 1
}

# Return 1 if nonlocal goto is supported, 0 otherwise.

proc check_effective_target_nonlocal_goto {} {
    if { [istarget nvptx-*-*] } {
        return 0
    }
    return 1
}

# Return 1 if global constructors are supported, 0 otherwise.

proc check_effective_target_global_constructor {} {
    if { [istarget nvptx-*-*] } {
        return 0
    }
    return 1
}

# Return 1 if taking label values is supported, 0 otherwise.

proc check_effective_target_label_values {} {
    if { [istarget nvptx-*-*] || [target_info exists gcc,no_label_values] } {
        return 0
    }

    return 1
}

# Return 1 if builtin_return_address and builtin_frame_address are
# supported, 0 otherwise.

proc check_effective_target_return_address {} {
    if { [istarget nvptx-*-*] } {
        return 0
    }
    return 1
}

# Return 1 if the assembler does not verify function types against
# calls, 0 otherwise.  Such verification will typically show up problems
# with K&R C function declarations.

proc check_effective_target_untyped_assembly {} {
    if { [istarget nvptx-*-*] } {
        return 0
    }
    return 1
}

# Return 1 if alloca is supported, 0 otherwise.

proc check_effective_target_alloca {} {
    if { [istarget nvptx-*-*] } {
        return [check_no_compiler_messages alloca assembly {
            void f (void*);
            void g (int n) { f (__builtin_alloca (n)); }
        }]
    }
    return 1
}

# Return 1 if thread local storage (TLS) is supported, 0 otherwise.

proc check_effective_target_tls {} {
    return [check_no_compiler_messages tls assembly {
        __thread int i;
        int f (void) { return i; }
        void g (int j) { i = j; }
    }]
}

# Return 1 if *native* thread local storage (TLS) is supported, 0 otherwise.

proc check_effective_target_tls_native {} {
    # VxWorks uses emulated TLS machinery, but with non-standard helper
    # functions, so we fail to automatically detect it.
    if { [istarget *-*-vxworks*] } {
        return 0
    }
    
    return [check_no_messages_and_pattern tls_native "!emutls" assembly {
        __thread int i;
        int f (void) { return i; }
        void g (int j) { i = j; }
    }]
}

# Return 1 if *emulated* thread local storage (TLS) is supported, 0 otherwise.

proc check_effective_target_tls_emulated {} {
    # VxWorks uses emulated TLS machinery, but with non-standard helper
    # functions, so we fail to automatically detect it.
    if { [istarget *-*-vxworks*] } {
        return 1
    }
    
    return [check_no_messages_and_pattern tls_emulated "emutls" assembly {
        __thread int i;
        int f (void) { return i; }
        void g (int j) { i = j; }
    }]
}

# Return 1 if TLS executables can run correctly, 0 otherwise.

proc check_effective_target_tls_runtime {} {
    return [check_runtime tls_runtime {
        __thread int thr __attribute__((tls_model("global-dynamic"))) = 0;
        int main (void) { return thr; }
    } [add_options_for_tls ""]]
}

# Return 1 if atomic compare-and-swap is supported on 'int'

proc check_effective_target_cas_char {} {
    return [check_no_compiler_messages cas_char assembly {
        #ifndef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1
        #error unsupported
        #endif
    } ""]
}

proc check_effective_target_cas_int {} {
    return [check_no_compiler_messages cas_int assembly {
        #if __INT_MAX__ == 0x7fff && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2
        /* ok */
        #elif __INT_MAX__ == 0x7fffffff && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
        /* ok */
        #else
        #error unsupported
        #endif
    } ""]
}

# Return 1 if -ffunction-sections is supported, 0 otherwise.

proc check_effective_target_function_sections {} {
    # Darwin has its own scheme and silently accepts -ffunction-sections.
    if { [istarget *-*-darwin*] } {
        return 0
    }
    
    return [check_no_compiler_messages functionsections assembly {
        void foo (void) { }
    } "-ffunction-sections"]
}

# Return 1 if instruction scheduling is available, 0 otherwise.

proc check_effective_target_scheduling {} {
    return [check_no_compiler_messages scheduling object {
        void foo (void) { }
    } "-fschedule-insns"]
}

# Return 1 if trapping arithmetic is available, 0 otherwise.

proc check_effective_target_trapping {} {
    return [check_no_compiler_messages trapping object {
        int add (int a, int b) { return a + b; }
    } "-ftrapv"]
}

# Return 1 if compilation with -fgraphite is error-free for trivial 
# code, 0 otherwise.

proc check_effective_target_fgraphite {} {
    return [check_no_compiler_messages fgraphite object {
        void foo (void) { }
    } "-O1 -fgraphite"]
}

# Return 1 if compilation with -fopenacc is error-free for trivial
# code, 0 otherwise.

proc check_effective_target_fopenacc {} {
    # nvptx can be built with the device-side bits of openacc, but it
    # does not make sense to test it as an openacc host.
    if [istarget nvptx-*-*] { return 0 }

    return [check_no_compiler_messages fopenacc object {
        void foo (void) { }
    } "-fopenacc"]
}

# Return 1 if compilation with -fopenmp is error-free for trivial
# code, 0 otherwise.

proc check_effective_target_fopenmp {} {
    # nvptx can be built with the device-side bits of libgomp, but it
    # does not make sense to test it as an openmp host.
    if [istarget nvptx-*-*] { return 0 }

    return [check_no_compiler_messages fopenmp object {
        void foo (void) { }
    } "-fopenmp"]
}

# Return 1 if compilation with -fgnu-tm is error-free for trivial
# code, 0 otherwise.

proc check_effective_target_fgnu_tm {} {
    return [check_no_compiler_messages fgnu_tm object {
        void foo (void) { }
    } "-fgnu-tm"]
}

# Return 1 if the target supports mmap, 0 otherwise.

proc check_effective_target_mmap {} {
    return [check_function_available "mmap"]
}

# Return 1 if the target supports dlopen, 0 otherwise.
proc check_effective_target_dlopen {} {
    return [check_no_compiler_messages dlopen executable {
        #include <dlfcn.h>
        int main(void) { dlopen ("dummy.so", RTLD_NOW); }
    } [add_options_for_dlopen ""]]
}

proc add_options_for_dlopen { flags } {
    return "$flags -ldl"
}

# Return 1 if the target supports clone, 0 otherwise.
proc check_effective_target_clone {} {
    return [check_function_available "clone"]
}

# Return 1 if the target supports setrlimit, 0 otherwise.
proc check_effective_target_setrlimit {} {
    # Darwin has non-posix compliant RLIMIT_AS
    if { [istarget *-*-darwin*] } {
        return 0
    }
    return [check_function_available "setrlimit"]
}

# Return 1 if the target supports gettimeofday, 0 otherwise.
proc check_effective_target_gettimeofday {} {
    return [check_function_available "gettimeofday"]
}

# Return 1 if the target supports swapcontext, 0 otherwise.
proc check_effective_target_swapcontext {} {
    return [check_no_compiler_messages swapcontext executable {
        #include <ucontext.h>
        int main (void)
        {
          ucontext_t orig_context,child_context;
          if (swapcontext(&child_context, &orig_context) < 0) { }
        }
    }]
}

# Return 1 if compilation with -pthread is error-free for trivial
# code, 0 otherwise.

proc check_effective_target_pthread {} {
    return [check_no_compiler_messages pthread object {
        void foo (void) { }
    } "-pthread"]
}

# Return 1 if compilation with -gstabs is error-free for trivial
# code, 0 otherwise.

proc check_effective_target_stabs {} {
    return [check_no_compiler_messages stabs object {
        void foo (void) { }
    } "-gstabs"]
}

# Return 1 if compilation with -mpe-aligned-commons is error-free
# for trivial code, 0 otherwise.

proc check_effective_target_pe_aligned_commons {} {
    if { [istarget *-*-cygwin*] || [istarget *-*-mingw*] } {
        return [check_no_compiler_messages pe_aligned_commons object {
            int foo;
        } "-mpe-aligned-commons"]
    }
    return 0
}

# Return 1 if the target supports -static
proc check_effective_target_static {} {
    return [check_no_compiler_messages static executable {
        int main (void) { return 0; }
    } "-static"]
}

# Return 1 if the target supports -fstack-protector
proc check_effective_target_fstack_protector {} {
    return [check_runtime fstack_protector {
        #include <string.h>
        int main (int argc, char *argv[]) {
          char buf[64];
          return !strcpy (buf, strrchr (argv[0], '/'));
        }
    } "-fstack-protector"]
}

# Return 1 if the target supports -fstack-check or -fstack-check=$stack_kind
proc check_stack_check_available { stack_kind } {
    if [string match "" $stack_kind] then {
        set stack_opt "-fstack-check"
    } else { set stack_opt "-fstack-check=$stack_kind" }

    return [check_no_compiler_messages stack_check_$stack_kind executable {
        int main (void) { return 0; }
    } "$stack_opt"]
}

# Return 1 if compilation with -freorder-blocks-and-partition is error-free
# for trivial code, 0 otherwise.  As some targets (ARM for example) only
# warn when -fprofile-use is also supplied we test that combination too.

proc check_effective_target_freorder {} {
    if { [check_no_compiler_messages freorder object {
        void foo (void) { }
    } "-freorder-blocks-and-partition"]
    && [check_no_compiler_messages fprofile_use_freorder object {
        void foo (void) { }
    } "-fprofile-use -freorder-blocks-and-partition -Wno-missing-profile"] } {
        return 1
    }
    return 0
}

# Return 1 if -fpic and -fPIC are supported, as in no warnings or errors
# emitted, 0 otherwise.  Whether a shared library can actually be built is
# out of scope for this test.

proc check_effective_target_fpic { } {
    # Note that M68K has a multilib that supports -fpic but not
    # -fPIC, so we need to check both.  We test with a program that
    # requires GOT references.
    foreach arg {fpic fPIC} {
        if [check_no_compiler_messages $arg object {
            extern int foo (void); extern int bar;
            int baz (void) { return foo () + bar; }
        } "-$arg"] {
            return 1
        }
    }
    return 0
}

# On AArch64, if -fpic is not supported, then we will fall back to -fPIC
# silently.  So, we can't rely on above "check_effective_target_fpic" as it
# assumes compiler will give warning if -fpic not supported.  Here we check
# whether binutils supports those new -fpic relocation modifiers, and assume
# -fpic is supported if there is binutils support.  GCC configuration will
# enable -fpic for AArch64 in this case.
#
# "check_effective_target_aarch64_small_fpic" is dedicated for checking small
# memory model -fpic relocation types.

proc check_effective_target_aarch64_small_fpic { } {
    if { [istarget aarch64*-*-*] } {
        return [check_no_compiler_messages aarch64_small_fpic object {
            void foo (void) { asm ("ldr x0, [x2, #:gotpage_lo15:globalsym]"); }
        }]
    } else {
        return 0
    }
}

# On AArch64, instruction sequence for TLS LE under -mtls-size=32 will utilize
# the relocation modifier "tprel_g0_nc" together with MOVK, it's only supported
# in binutils since 2015-03-04 as PR gas/17843.
#
# This test directive make sure binutils support all features needed by TLS LE
# under -mtls-size=32 on AArch64.

proc check_effective_target_aarch64_tlsle32 { } {
    if { [istarget aarch64*-*-*] } {
        return [check_no_compiler_messages aarch64_tlsle32 object {
            void foo (void) { asm ("movk x1,#:tprel_g0_nc:t1"); }
        }]
    } else {
        return 0
    }
}

# Return 1 if -shared is supported, as in no warnings or errors
# emitted, 0 otherwise.

proc check_effective_target_shared { } {
    # Note that M68K has a multilib that supports -fpic but not
    # -fPIC, so we need to check both.  We test with a program that
    # requires GOT references.
    return [check_no_compiler_messages shared executable {
        extern int foo (void); extern int bar;
        int baz (void) { return foo () + bar; }
    } "-shared -fpic"]
}

# Return 1 if -pie, -fpie and -fPIE are supported, 0 otherwise.

proc check_effective_target_pie { } {
    if { [istarget *-*-darwin\[912\]*]
         || [istarget *-*-dragonfly*]
         || [istarget *-*-freebsd*]
         || [istarget *-*-linux*]
         || [istarget *-*-gnu*] } {
        return 1;
    }
    if { [istarget *-*-solaris2.1\[1-9\]*] } {
        # Full PIE support was added in Solaris 11.3, but gcc errors out
        # if missing, so check for that.
        return [check_no_compiler_messages pie executable {
            int main (void) { return 0; }
        } "-pie -fpie"]
    }
    return 0
}

# Return true if the target supports -mpaired-single (as used on MIPS).

proc check_effective_target_mpaired_single { } {
    return [check_no_compiler_messages mpaired_single object {
        void foo (void) { }
    } "-mpaired-single"]
}

# Return true if the target has access to FPU instructions.

proc check_effective_target_hard_float { } {
    if { [istarget mips*-*-*] } {
        return [check_no_compiler_messages hard_float assembly {
                #if (defined __mips_soft_float || defined __mips16)
                #error __mips_soft_float || __mips16
                #endif
        }]
    }

    # This proc is actually checking the availabilty of FPU
    # support for doubles, so on the RX we must fail if the
    # 64-bit double multilib has been selected.
    if { [istarget rx-*-*] } {
        return 0
        # return [check_no_compiler_messages hard_float assembly {
                #if defined __RX_64_BIT_DOUBLES__
                #error __RX_64_BIT_DOUBLES__
                #endif
        # }]
    }

    # The generic test doesn't work for C-SKY because some cores have
    # hard float for single precision only.
    if { [istarget csky*-*-*] } {
       return [check_no_compiler_messages hard_float assembly {
               #if defined __csky_soft_float__
               #error __csky_soft_float__
               #endif
       }]
    }

    # The generic test equates hard_float with "no call for adding doubles".
    return [check_no_messages_and_pattern hard_float "!\\(call" rtl-expand {
        double a (double b, double c) { return b + c; }
    }]
}

# Return true if the target is a 64-bit MIPS target.

proc check_effective_target_mips64 { } {
    return [check_no_compiler_messages mips64 assembly {
        #ifndef __mips64
        #error !__mips64
        #endif
    }]
}

# Return true if the target is a MIPS target that does not produce
# MIPS16 code.

proc check_effective_target_nomips16 { } {
    return [check_no_compiler_messages nomips16 object {
        #ifndef __mips
        #error !__mips
        #else
        /* A cheap way of testing for -mflip-mips16.  */
        void foo (void) { asm ("addiu $20,$20,1"); }
        void bar (void) { asm ("addiu $20,$20,1"); }
        #endif
    }]
}

# Add the options needed for MIPS16 function attributes.  At the moment,
# we don't support MIPS16 PIC.

proc add_options_for_mips16_attribute { flags } {
    return "$flags -mno-abicalls -fno-pic -DMIPS16=__attribute__((mips16))"
}

# Return true if we can force a mode that allows MIPS16 code generation.
# We don't support MIPS16 PIC, and only support MIPS16 -mhard-float
# for o32 and o64.

proc check_effective_target_mips16_attribute { } {
    return [check_no_compiler_messages mips16_attribute assembly {
        #ifdef PIC
        #error PIC
        #endif
        #if defined __mips_hard_float \
            && (!defined _ABIO32 || _MIPS_SIM != _ABIO32) \
            && (!defined _ABIO64 || _MIPS_SIM != _ABIO64)
        #error __mips_hard_float && (!_ABIO32 || !_ABIO64)
        #endif
    } [add_options_for_mips16_attribute ""]]
}

# Return 1 if the target supports long double larger than double when
# using the new ABI, 0 otherwise.

proc check_effective_target_mips_newabi_large_long_double { } {
    return [check_no_compiler_messages mips_newabi_large_long_double object {
        int dummy[sizeof(long double) > sizeof(double) ? 1 : -1];
    } "-mabi=64"]
}

# Return true if the target is a MIPS target that has access
# to the LL and SC instructions.

proc check_effective_target_mips_llsc { } {
    if { ![istarget mips*-*-*] } {
        return 0
    }
    # Assume that these instructions are always implemented for
    # non-elf* targets, via emulation if necessary.
    if { ![istarget *-*-elf*] } {
        return 1
    }
    # Otherwise assume LL/SC support for everything but MIPS I.
    return [check_no_compiler_messages mips_llsc assembly {
        #if __mips == 1
        #error __mips == 1
        #endif
    }]
}

# Return true if the target is a MIPS target that uses in-place relocations.

proc check_effective_target_mips_rel { } {
    if { ![istarget mips*-*-*] } {
        return 0
    }
    return [check_no_compiler_messages mips_rel object {
        #if (defined _ABIN32 && _MIPS_SIM == _ABIN32) \
            || (defined _ABI64 && _MIPS_SIM == _ABI64)
        #error _ABIN32 && (_ABIN32 || _ABI64)
        #endif
    }]
}

# Return true if the target is a MIPS target that uses the EABI.

proc check_effective_target_mips_eabi { } {
    if { ![istarget mips*-*-*] } {
        return 0
    }
    return [check_no_compiler_messages mips_eabi object {
        #ifndef __mips_eabi
        #error !__mips_eabi
        #endif
    }]
}

# Return 1 if the current multilib does not generate PIC by default.

proc check_effective_target_nonpic { } {
    return [check_no_compiler_messages nonpic assembly {
        #if __PIC__
        #error __PIC__
        #endif
    }]
}

# Return 1 if the current multilib generates PIE by default.

proc check_effective_target_pie_enabled { } {
    return [check_no_compiler_messages pie_enabled assembly {
        #ifndef __PIE__
        #error unsupported
        #endif
    }]
}

# Return 1 if the target generates -fstack-protector by default.

proc check_effective_target_fstack_protector_enabled {} {
    return [ check_no_compiler_messages fstack_protector_enabled assembly {
    #if !defined(__SSP__) && !defined(__SSP_ALL__) && \
      !defined(__SSP_STRONG__) && !defined(__SSP_EXPICIT__)
    #error unsupported
    #endif
    }]
}

# Return 1 if the target does not use a status wrapper.

proc check_effective_target_unwrapped { } {
    if { [target_info needs_status_wrapper] != "" \
             && [target_info needs_status_wrapper] != "0" } {
        return 0
    }
    return 1
}

# Return true if iconv is supported on the target. In particular IBM1047.

proc check_iconv_available { test_what } {
    global libiconv

    # If the tool configuration file has not set libiconv, try "-liconv"
    if { ![info exists libiconv] } {
        set libiconv "-liconv"
    }
    set test_what [lindex $test_what 1]
    return [check_runtime_nocache $test_what [subst {
        #include <iconv.h>
        int main (void)
        {
          iconv_t cd;

          cd = iconv_open ("$test_what", "UTF-8");
          if (cd == (iconv_t) -1)
            return 1;
          return 0;
        }
    }] $libiconv]
}

# Return true if the atomic library is supported on the target.
proc check_effective_target_libatomic_available { } {
    return [check_no_compiler_messages libatomic_available executable {
        int main (void) { return 0; }
    } "-latomic"]
}

# Return 1 if an ASCII locale is supported on this host, 0 otherwise.

proc check_ascii_locale_available { } {
    return 1
}

# Return true if named sections are supported on this target.

proc check_named_sections_available { } {
    return [check_no_compiler_messages named_sections assembly {
        int __attribute__ ((section("whatever"))) foo;
    }]
}

# Return true if the "naked" function attribute is supported on this target.

proc check_effective_target_naked_functions { } {
    return [check_no_compiler_messages naked_functions assembly {
        void f() __attribute__((naked));
    }]
}

# Return 1 if the target supports Fortran real kinds larger than real(8),
# 0 otherwise.
#
# When the target name changes, replace the cached result.

proc check_effective_target_fortran_large_real { } {
    return [check_no_compiler_messages fortran_large_real executable {
        ! Fortran
        integer,parameter :: k = selected_real_kind (precision (0.0_8) + 1)
        real(kind=k) :: x
        x = cos (x)
        end
    }]
}

# Return 1 if the target supports Fortran real kind real(16),
# 0 otherwise. Contrary to check_effective_target_fortran_large_real
# this checks for Real(16) only; the other returned real(10) if
# both real(10) and real(16) are available.
#
# When the target name changes, replace the cached result.

proc check_effective_target_fortran_real_16 { } {
    return [check_no_compiler_messages fortran_real_16 executable {
        ! Fortran
        real(kind=16) :: x
        x = cos (x)
        end
    }]
}

# Return 1 if the target supports Fortran real kind 10,
# 0 otherwise. Contrary to check_effective_target_fortran_large_real
# this checks for real(10) only.
#
# When the target name changes, replace the cached result.

proc check_effective_target_fortran_real_10 { } {
    return [check_no_compiler_messages fortran_real_10 executable {
        ! Fortran
        real(kind=10) :: x
        x = cos (x)
        end
    }]
}

# Return 1 if the target supports Fortran's IEEE modules,
# 0 otherwise.
#
# When the target name changes, replace the cached result.

proc check_effective_target_fortran_ieee { flags } {
    return [check_no_compiler_messages fortran_ieee executable {
        ! Fortran
        use, intrinsic :: ieee_features
        end
    } $flags ]
}


# Return 1 if the target supports SQRT for the largest floating-point
# type. (Some targets lack the libm support for this FP type.)
# On most targets, this check effectively checks either whether sqrtl is
# available or on __float128 systems whether libquadmath is installed,
# which provides sqrtq.
#
# When the target name changes, replace the cached result.

proc check_effective_target_fortran_largest_fp_has_sqrt { } {
    return [check_no_compiler_messages fortran_largest_fp_has_sqrt executable {
        ! Fortran
        use iso_fortran_env, only: real_kinds
        integer,parameter:: maxFP = real_kinds(ubound(real_kinds,dim=1))
        real(kind=maxFP), volatile :: x
        x = 2.0_maxFP
        x = sqrt (x)
        end
    }]
}


# Return 1 if the target supports Fortran integer kinds larger than
# integer(8), 0 otherwise.
#
# When the target name changes, replace the cached result.

proc check_effective_target_fortran_large_int { } {
    return [check_no_compiler_messages fortran_large_int executable {
        ! Fortran
        integer,parameter :: k = selected_int_kind (range (0_8) + 1)
        integer(kind=k) :: i
        end
    }]
}

# Return 1 if the target supports Fortran integer(16), 0 otherwise.
#
# When the target name changes, replace the cached result.

proc check_effective_target_fortran_integer_16 { } {
    return [check_no_compiler_messages fortran_integer_16 executable {
        ! Fortran
        integer(16) :: i
        end
    }]
}

# Return 1 if we can statically link libgfortran, 0 otherwise.
#
# When the target name changes, replace the cached result.

proc check_effective_target_static_libgfortran { } {
    return [check_no_compiler_messages static_libgfortran executable {
        ! Fortran
        print *, 'test'
        end
    } "-static"]
}

# Return 1 if we can use the -rdynamic option, 0 otherwise.

proc check_effective_target_rdynamic { } {
  return [check_no_compiler_messages rdynamic executable {
     int main() { return 0; }
  } "-rdynamic"]
}

proc check_linker_plugin_available { } {
  return [check_no_compiler_messages_nocache linker_plugin executable {
     int main() { return 0; }
  } "-flto -fuse-linker-plugin"]
}

# Return 1 if the target OS supports running SSE executables, 0
# otherwise.  Cache the result.

proc check_sse_os_support_available { } {
    return [check_cached_effective_target sse_os_support_available {
        # If this is not the right target then we can skip the test.
        if { !([istarget i?86-*-*] || [istarget x86_64-*-*]) } {
            expr 0
        } elseif { [istarget i?86-*-solaris2*] } {
            # The Solaris 2 kernel doesn't save and restore SSE registers
            # before Solaris 9 4/04.  Before that, executables die with SIGILL.
            check_runtime_nocache sse_os_support_available {
                int main ()
                {
                  asm volatile ("movaps %xmm0,%xmm0");
                  return 0;
                }
            } "-msse"
        } else {
            expr 1
        }
    }]
}

# Return 1 if the target OS supports running AVX executables, 0
# otherwise.  Cache the result.

proc check_avx_os_support_available { } {
    return [check_cached_effective_target avx_os_support_available {
        # If this is not the right target then we can skip the test.
        if { !([istarget i?86-*-*] || [istarget x86_64-*-*]) } {
            expr 0
        } else {
            # Check that OS has AVX and SSE saving enabled.
            check_runtime_nocache avx_os_support_available {
                int main ()
                {
                  unsigned int eax, edx;

                  asm ("xgetbv" : "=a" (eax), "=d" (edx) : "c" (0));
                  return (eax & 0x06) != 0x06;
                }
            } ""
        }
    }]
}

# Return 1 if the target OS supports running AVX executables, 0
# otherwise.  Cache the result.

proc check_avx512_os_support_available { } {
    return [check_cached_effective_target avx512_os_support_available {
        # If this is not the right target then we can skip the test.
        if { !([istarget i?86-*-*] || [istarget x86_64-*-*]) } {
            expr 0
        } else {
            # Check that OS has AVX512, AVX and SSE saving enabled.
            check_runtime_nocache avx512_os_support_available {
                int main ()
                {
                  unsigned int eax, edx;

                  asm ("xgetbv" : "=a" (eax), "=d" (edx) : "c" (0));
                  return (eax & 0xe6) != 0xe6;
                }
            } ""
        }
    }]
}

# Return 1 if the target supports executing SSE instructions, 0
# otherwise.  Cache the result.

proc check_sse_hw_available { } {
    return [check_cached_effective_target sse_hw_available {
        # If this is not the right target then we can skip the test.
        if { !([istarget i?86-*-*] || [istarget x86_64-*-*]) } {
            expr 0
        } else {
            check_runtime_nocache sse_hw_available {
                #include "cpuid.h"
                int main ()
                {
                  unsigned int eax, ebx, ecx, edx;
                  if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
                    return 1;

                  return !(edx & bit_SSE);
                }
            } ""
        }
    }]
}

# Return 1 if the target supports executing SSE2 instructions, 0
# otherwise.  Cache the result.

proc check_sse2_hw_available { } {
    return [check_cached_effective_target sse2_hw_available {
        # If this is not the right target then we can skip the test.
        if { !([istarget i?86-*-*] || [istarget x86_64-*-*]) } {
            expr 0
        } else {
            check_runtime_nocache sse2_hw_available {
                #include "cpuid.h"
                int main ()
                {
                  unsigned int eax, ebx, ecx, edx;
                  if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
                    return 1;

                  return !(edx & bit_SSE2);
                }
            } ""
        }
    }]
}

# Return 1 if the target supports executing SSE4 instructions, 0
# otherwise.  Cache the result.

proc check_sse4_hw_available { } {
    return [check_cached_effective_target sse4_hw_available {
        # If this is not the right target then we can skip the test.
        if { !([istarget i?86-*-*] || [istarget x86_64-*-*]) } {
            expr 0
        } else {
            check_runtime_nocache sse4_hw_available {
                #include "cpuid.h"
                int main ()
                {
                  unsigned int eax, ebx, ecx, edx;
                  if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
                    return 1;

                  return !(ecx & bit_SSE4_2);
                }
            } ""
        }
    }]
}

# Return 1 if the target supports executing AVX instructions, 0
# otherwise.  Cache the result.

proc check_avx_hw_available { } {
    return [check_cached_effective_target avx_hw_available {
        # If this is not the right target then we can skip the test.
        if { !([istarget i?86-*-*] || [istarget x86_64-*-*]) } {
            expr 0
        } else {
            check_runtime_nocache avx_hw_available {
                #include "cpuid.h"
                int main ()
                {
                  unsigned int eax, ebx, ecx, edx;
                  if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
                    return 1;

                  return ((ecx & (bit_AVX | bit_OSXSAVE))
                          != (bit_AVX | bit_OSXSAVE));
                }
            } ""
        }
    }]
}

# Return 1 if the target supports executing AVX2 instructions, 0
# otherwise.  Cache the result.

proc check_avx2_hw_available { } {
    return [check_cached_effective_target avx2_hw_available {
        # If this is not the right target then we can skip the test.
        if { !([istarget x86_64-*-*] || [istarget i?86-*-*]) } {
            expr 0
        } else {
            check_runtime_nocache avx2_hw_available {
                #include <stddef.h>
                #include "cpuid.h"
                int main ()
                {
                  unsigned int eax, ebx, ecx, edx;

                  if (__get_cpuid_max (0, NULL) < 7)
                    return 1;

                  __cpuid (1, eax, ebx, ecx, edx);

                  if (!(ecx & bit_OSXSAVE))
                    return 1;

                  __cpuid_count (7, 0, eax, ebx, ecx, edx);

                  return !(ebx & bit_AVX2);
                }
            } ""
        }
    }]
}

# Return 1 if the target supports executing AVX512 foundation instructions, 0
# otherwise.  Cache the result.

proc check_avx512f_hw_available { } {
    return [check_cached_effective_target avx512f_hw_available {
        # If this is not the right target then we can skip the test.
        if { !([istarget x86_64-*-*] || [istarget i?86-*-*]) } {
            expr 0
        } else {
            check_runtime_nocache avx512f_hw_available {
                #include <stddef.h>
                #include "cpuid.h"
                int main ()
                {
                  unsigned int eax, ebx, ecx, edx;

                  if (__get_cpuid_max (0, NULL) < 7)
                    return 1;

                  __cpuid (1, eax, ebx, ecx, edx);

                  if (!(ecx & bit_OSXSAVE))
                    return 1;

                  __cpuid_count (7, 0, eax, ebx, ecx, edx);

                  return !(ebx & bit_AVX512F);
                }
            } ""
        }
    }]
}

# Return 1 if the target supports running SSE executables, 0 otherwise.

proc check_effective_target_sse_runtime { } {
    if { [check_effective_target_sse]
         && [check_sse_hw_available]
         && [check_sse_os_support_available] } {
        return 1
    }
    return 0
}

# Return 1 if the target supports running SSE2 executables, 0 otherwise.

proc check_effective_target_sse2_runtime { } {
    if { [check_effective_target_sse2]
         && [check_sse2_hw_available]
         && [check_sse_os_support_available] } {
        return 1
    }
    return 0
}

# Return 1 if the target supports running SSE4 executables, 0 otherwise.

proc check_effective_target_sse4_runtime { } {
    if { [check_effective_target_sse4]
         && [check_sse4_hw_available]
         && [check_sse_os_support_available] } {
        return 1
    }
    return 0
}

# Return 1 if the target supports running AVX executables, 0 otherwise.

proc check_effective_target_avx_runtime { } {
    if { [check_effective_target_avx]
         && [check_avx_hw_available]
         && [check_avx_os_support_available] } {
        return 1
    }
    return 0
}

# Return 1 if the target supports running AVX2 executables, 0 otherwise.

proc check_effective_target_avx2_runtime { } {
    if { [check_effective_target_avx2]
         && [check_avx2_hw_available]
         && [check_avx_os_support_available] } {
        return 1
    }
    return 0
}

# Return 1 if the target supports running AVX512f executables, 0 otherwise.

proc check_effective_target_avx512f_runtime { } {
    if { [check_effective_target_avx512f]
         && [check_avx512f_hw_available]
         && [check_avx512_os_support_available] } {
        return 1
    }
    return 0
}

# Return 1 if bmi2 instructions can be compiled.
proc check_effective_target_bmi2 { } {
    if { !([istarget i?86-*-*] || [istarget x86_64-*-*]) } {
        return 0
    }
    return [check_no_compiler_messages bmi2 object {
        unsigned int
        _bzhi_u32 (unsigned int __X, unsigned int __Y)
        {
            return __builtin_ia32_bzhi_si (__X, __Y);
        }
    } "-mbmi2" ]
}

# Return 1 if the target supports executing MIPS Paired-Single instructions,
# 0 otherwise.  Cache the result.

proc check_mpaired_single_hw_available { } {
    return [check_cached_effective_target mpaired_single_hw_available {
        # If this is not the right target then we can skip the test.
        if { !([istarget mips*-*-*]) } {
            expr 0
        } else {
            check_runtime_nocache mpaired_single_hw_available {
              int main()
              {
                asm volatile ("pll.ps $f2,$f4,$f6");
                return 0;
              }
            } ""
        }
    }]
}

# Return 1 if the target supports executing Loongson vector instructions,
# 0 otherwise.  Cache the result.

proc check_mips_loongson_mmi_hw_available { } {
    return [check_cached_effective_target mips_loongson_mmi_hw_available {
        # If this is not the right target then we can skip the test.
        if { !([istarget mips*-*-*]) } {
            expr 0
        } else {
            check_runtime_nocache mips_loongson_mmi_hw_available {
              #include <loongson-mmiintrin.h>
              int main()
              {
                asm volatile ("paddw $f2,$f4,$f6");
                return 0;
              }
            } "-mloongson-mmi"
        }
    }]
}

# Return 1 if the target supports executing MIPS MSA instructions, 0
# otherwise.  Cache the result.

proc check_mips_msa_hw_available { } {
  return [check_cached_effective_target mips_msa_hw_available {
    # If this is not the right target then we can skip the test.
    if { !([istarget mips*-*-*]) } {
      expr 0
    } else {
      check_runtime_nocache mips_msa_hw_available {
        #if !defined(__mips_msa)
        #error "MSA NOT AVAIL"
        #else
        #if !(((__mips == 64) || (__mips == 32)) && (__mips_isa_rev >= 2))
        #error "MSA NOT AVAIL FOR ISA REV < 2"
        #endif
        #if !defined(__mips_hard_float)
        #error "MSA HARD_FLOAT REQUIRED"
        #endif
        #if __mips_fpr != 64
        #error "MSA 64-bit FPR REQUIRED"
        #endif
        #include <msa.h>

        int main()
        {
          v8i16 v = __builtin_msa_ldi_h (0);
          v[0] = 0;
          return v[0];
        }
        #endif
      } "-mmsa"
    }
  }]
}

# Return 1 if the target supports running MIPS Paired-Single
# executables, 0 otherwise.

proc check_effective_target_mpaired_single_runtime { } {
    if { [check_effective_target_mpaired_single]
         && [check_mpaired_single_hw_available] } {
        return 1
    }
    return 0
}

# Return 1 if the target supports running Loongson executables, 0 otherwise.

proc check_effective_target_mips_loongson_mmi_runtime { } {
    if { [check_effective_target_mips_loongson_mmi]
         && [check_mips_loongson_mmi_hw_available] } {
        return 1
    }
    return 0
}

# Return 1 if the target supports running MIPS MSA executables, 0 otherwise.

proc check_effective_target_mips_msa_runtime { } {
  if { [check_effective_target_mips_msa]
       && [check_mips_msa_hw_available] } {
    return 1
  }
  return 0
}

# Return 1 if we are compiling for 64-bit PowerPC but we do not use direct
# move instructions for moves from GPR to FPR.

proc check_effective_target_powerpc64_no_dm { } {
    # The "mulld" checks if we are generating PowerPC64 code.  The "lfd"
    # checks if we do not use direct moves, but use the old-fashioned
    # slower move-via-the-stack.
    return [check_no_messages_and_pattern powerpc64_no_dm \
        {\mmulld\M.*\mlfd} assembly {
            double f(long long x) { return x*x; }
        } {-O2}]
}

# Return 1 if the target supports the __builtin_cpu_supports built-in,
# including having a new enough library to support the test.  Cache the result.
# Require at least a power7 to run on.

proc check_ppc_cpu_supports_hw_available { } {
    return [check_cached_effective_target ppc_cpu_supports_hw_available {
        # Some simulators are known to not support VSX/power8 instructions.
        # For now, disable on Darwin
        if { [istarget powerpc-*-eabi]
             || [istarget powerpc*-*-eabispe]
             || [istarget *-*-darwin*]} {
            expr 0
        } else {
            set options "-mvsx"
            check_runtime_nocache ppc_cpu_supports_hw_available {
                int main()
                {
                #ifdef __MACH__
                  asm volatile ("xxlor vs0,vs0,vs0");
                #else
                  asm volatile ("xxlor 0,0,0");
                #endif
                  if (!__builtin_cpu_supports ("vsx"))
                    return 1;
                  return 0;
                }
            } $options
        }
    }]
}

# Return 1 if the target supports executing 750CL paired-single instructions, 0
# otherwise.  Cache the result.

proc check_750cl_hw_available { } {
    return [check_cached_effective_target 750cl_hw_available {
        # If this is not the right target then we can skip the test.
        if { ![istarget powerpc-*paired*] } {
            expr 0
        } else {
            check_runtime_nocache 750cl_hw_available {
                 int main()
                 {
                 #ifdef __MACH__
                   asm volatile ("ps_mul v0,v0,v0");
                 #else
                   asm volatile ("ps_mul 0,0,0");
                 #endif
                   return 0;
                 }
            } "-mpaired"
        }
    }]
}

# Return 1 if the target supports executing power8 vector instructions, 0
# otherwise.  Cache the result.

proc check_p8vector_hw_available { } {
    return [check_cached_effective_target p8vector_hw_available {
        # Some simulators are known to not support VSX/power8 instructions.
        # For now, disable on Darwin
        if { [istarget powerpc-*-eabi]
             || [istarget powerpc*-*-eabispe]
             || [istarget *-*-darwin*]} {
            expr 0
        } else {
            set options "-mpower8-vector"
            check_runtime_nocache p8vector_hw_available {
                int main()
                {
                #ifdef __MACH__
                  asm volatile ("xxlorc vs0,vs0,vs0");
                #else
                  asm volatile ("xxlorc 0,0,0");
                #endif
                  return 0;
                }
            } $options
        }
    }]
}

# Return 1 if the target supports executing power9 vector instructions, 0
# otherwise.  Cache the result.

proc check_p9vector_hw_available { } {
    return [check_cached_effective_target p9vector_hw_available {
        # Some simulators are known to not support VSX/power8/power9
        # instructions. For now, disable on Darwin.
        if { [istarget powerpc-*-eabi]
             || [istarget powerpc*-*-eabispe]
             || [istarget *-*-darwin*]} {
            expr 0
        } else {
            set options "-mpower9-vector"
            check_runtime_nocache p9vector_hw_available {
                int main()
                {
                    long e = -1;
                    vector double v = (vector double) { 0.0, 0.0 };
                    asm ("xsxexpdp %0,%1" : "+r" (e) : "wa" (v));
                    return e;
                }
            } $options
        }
    }]
}

# Return 1 if the target supports executing power9 modulo instructions, 0
# otherwise.  Cache the result.

proc check_p9modulo_hw_available { } {
    return [check_cached_effective_target p9modulo_hw_available {
        # Some simulators are known to not support VSX/power8/power9
        # instructions. For now, disable on Darwin.
        if { [istarget powerpc-*-eabi]
             || [istarget powerpc*-*-eabispe]
             || [istarget *-*-darwin*]} {
            expr 0
        } else {
            set options "-mmodulo"
            check_runtime_nocache p9modulo_hw_available {
                int main()
                {
                    int i = 5, j = 3, r = -1;
                    asm ("modsw %0,%1,%2" : "+r" (r) : "r" (i), "r" (j));
                    return (r == 2);
                }
            } $options
        }
    }]
}

# Return 1 if the target supports executing __float128 on PowerPC via software
# emulation, 0 otherwise.  Cache the result.

proc check_ppc_float128_sw_available { } {
    return [check_cached_effective_target ppc_float128_sw_available {
        # Some simulators are known to not support VSX/power8/power9
        # instructions. For now, disable on Darwin.
        if { [istarget powerpc-*-eabi]
             || [istarget powerpc*-*-eabispe]
             || [istarget *-*-darwin*]} {
            expr 0
        } else {
            set options "-mfloat128 -mvsx"
            check_runtime_nocache ppc_float128_sw_available {
                volatile __float128 x = 1.0q;
                volatile __float128 y = 2.0q;
                int main()
                {
                    __float128 z = x + y;
                    return (z != 3.0q);
                }
            } $options
        }
    }]
}

# Return 1 if the target supports executing __float128 on PowerPC via power9
# hardware instructions, 0 otherwise.  Cache the result.

proc check_ppc_float128_hw_available { } {
    return [check_cached_effective_target ppc_float128_hw_available {
        # Some simulators are known to not support VSX/power8/power9
        # instructions. For now, disable on Darwin.
        if { [istarget powerpc-*-eabi]
             || [istarget powerpc*-*-eabispe]
             || [istarget *-*-darwin*]} {
            expr 0
        } else {
            set options "-mfloat128 -mvsx -mfloat128-hardware -mpower9-vector"
            check_runtime_nocache ppc_float128_hw_available {
                volatile __float128 x = 1.0q;
                volatile __float128 y = 2.0q;
                int main()
                {
                    __float128 z = x + y;
                    __float128 w = -1.0q;

                    __asm__ ("xsaddqp %0,%1,%2" : "+v" (w) : "v" (x), "v" (y));
                    return ((z != 3.0q) || (z != w));
                }
            } $options
        }
    }]
}

# Return 1 if the target supports executing VSX instructions, 0
# otherwise.  Cache the result.

proc check_vsx_hw_available { } {
    return [check_cached_effective_target vsx_hw_available {
        # Some simulators are known to not support VSX instructions.
        # For now, disable on Darwin
        if { [istarget powerpc-*-eabi]
             || [istarget powerpc*-*-eabispe]
             || [istarget *-*-darwin*]} {
            expr 0
        } else {
            set options "-mvsx"
            check_runtime_nocache vsx_hw_available {
                int main()
                {
                #ifdef __MACH__
                  asm volatile ("xxlor vs0,vs0,vs0");
                #else
                  asm volatile ("xxlor 0,0,0");
                #endif
                  return 0;
                }
            } $options
        }
    }]
}

# Return 1 if the target supports executing AltiVec instructions, 0
# otherwise.  Cache the result.

proc check_vmx_hw_available { } {
    return [check_cached_effective_target vmx_hw_available {
        # Some simulators are known to not support VMX instructions.
        if { [istarget powerpc-*-eabi] || [istarget powerpc*-*-eabispe] } {
            expr 0
        } else {
            # Most targets don't require special flags for this test case, but
            # Darwin does.  Just to be sure, make sure VSX is not enabled for
            # the altivec tests.
            if { [istarget *-*-darwin*]
                 || [istarget *-*-aix*] } {
                set options "-maltivec -mno-vsx"
            } else {
                set options "-mno-vsx"
            }
            check_runtime_nocache vmx_hw_available {
                int main()
                {
                #ifdef __MACH__
                  asm volatile ("vor v0,v0,v0");
                #else
                  asm volatile ("vor 0,0,0");
                #endif
                  return 0;
                }
            } $options
        }
    }]
}

proc check_ppc_recip_hw_available { } {
    return [check_cached_effective_target ppc_recip_hw_available {
        # Some simulators may not support FRE/FRES/FRSQRTE/FRSQRTES
        # For now, disable on Darwin
        if { [istarget powerpc-*-eabi] || [istarget powerpc*-*-eabispe] || [istarget *-*-darwin*]} {
            expr 0
        } else {
            set options "-mpowerpc-gfxopt -mpowerpc-gpopt -mpopcntb"
            check_runtime_nocache ppc_recip_hw_available {
                volatile double d_recip, d_rsqrt, d_four = 4.0;
                volatile float f_recip, f_rsqrt, f_four = 4.0f;
                int main()
                {
                  asm volatile ("fres %0,%1" : "=f" (f_recip) : "f" (f_four));
                  asm volatile ("fre %0,%1" : "=d" (d_recip) : "d" (d_four));
                  asm volatile ("frsqrtes %0,%1" : "=f" (f_rsqrt) : "f" (f_four));
                  asm volatile ("frsqrte %0,%1" : "=f" (d_rsqrt) : "d" (d_four));
                  return 0;
                }
            } $options
        }
    }]
}

# Return 1 if the target supports executing AltiVec and Cell PPU
# instructions, 0 otherwise.  Cache the result.

proc check_effective_target_cell_hw { } {
    return [check_cached_effective_target cell_hw_available {
        # Some simulators are known to not support VMX and PPU instructions.
        if { [istarget powerpc-*-eabi*] } {
            expr 0
        } else {
            # Most targets don't require special flags for this test
            # case, but Darwin and AIX do.
            if { [istarget *-*-darwin*]
                 || [istarget *-*-aix*] } {
                set options "-maltivec -mcpu=cell"
            } else {
                set options "-mcpu=cell"
            }
            check_runtime_nocache cell_hw_available {
                int main()
                {
                #ifdef __MACH__
                  asm volatile ("vor v0,v0,v0");
                  asm volatile ("lvlx v0,r0,r0");
                #else
                  asm volatile ("vor 0,0,0");
                  asm volatile ("lvlx 0,0,0");
                #endif
                  return 0;
                }
            } $options
        }
    }]
}

# Return 1 if the target supports executing 64-bit instructions, 0
# otherwise.  Cache the result.

proc check_effective_target_powerpc64 { } {
    global powerpc64_available_saved
    global tool

    if [info exists powerpc64_available_saved] {
        verbose "check_effective_target_powerpc64 returning saved $powerpc64_available_saved" 2
    } else {
        set powerpc64_available_saved 0

        # Some simulators are known to not support powerpc64 instructions.
        if { [istarget powerpc-*-eabi*] || [istarget powerpc-ibm-aix*] } {
            verbose "check_effective_target_powerpc64 returning 0" 2
            return $powerpc64_available_saved
        }

        # Set up, compile, and execute a test program containing a 64-bit
        # instruction.  Include the current process ID in the file
        # names to prevent conflicts with invocations for multiple
        # testsuites.
        set src ppc[pid].c
        set exe ppc[pid].x

        set f [open $src "w"]
        puts $f "int main() {"
        puts $f "#ifdef __MACH__"
        puts $f "  asm volatile (\"extsw r0,r0\");"
        puts $f "#else"
        puts $f "  asm volatile (\"extsw 0,0\");"
        puts $f "#endif"
        puts $f "  return 0; }"
        close $f

        set opts "additional_flags=-mcpu=G5"

        verbose "check_effective_target_powerpc64 compiling testfile $src" 2
        set lines [${tool}_target_compile $src $exe executable "$opts"]
        file delete $src

        if [string match "" $lines] then {
            # No error message, compilation succeeded.
            set result [${tool}_load "./$exe" "" ""]
            set status [lindex $result 0]
            remote_file build delete $exe
            verbose "check_effective_target_powerpc64 testfile status is <$status>" 2

            if { $status == "pass" } then {
                set powerpc64_available_saved 1
            }
        } else {
            verbose "check_effective_target_powerpc64 testfile compilation failed" 2
        }
    }

    return $powerpc64_available_saved
}

# GCC 3.4.0 for powerpc64-*-linux* included an ABI fix for passing
# complex float arguments.  This affects gfortran tests that call cabsf
# in libm built by an earlier compiler.  Return 0 if libm uses the same
# argument passing as the compiler under test, 1 otherwise.

proc check_effective_target_broken_cplxf_arg { } {
    # Skip the work for targets known not to be affected.
    if { ![istarget powerpc*-*-linux*] || ![is-effective-target lp64] } {
        return 0
    }

    return [check_cached_effective_target broken_cplxf_arg {
        check_runtime_nocache broken_cplxf_arg {
            #include <complex.h>
            extern void abort (void);
            float fabsf (float);
            float cabsf (_Complex float);
            int main ()
            {
              _Complex float cf;
              float f;
              cf = 3 + 4.0fi;
              f = cabsf (cf);
              if (fabsf (f - 5.0) > 0.0001)
                /* Yes, it's broken.  */
                return 0;
              /* All fine, not broken.  */
              return 1;
            }
        } "-lm"
    }]
}

# Return 1 is this is a TI C6X target supporting C67X instructions
proc check_effective_target_ti_c67x { } {
    return [check_no_compiler_messages ti_c67x assembly {
        #if !defined(_TMS320C6700)
        #error !_TMS320C6700
        #endif
    }]
}

# Return 1 is this is a TI C6X target supporting C64X+ instructions
proc check_effective_target_ti_c64xp { } {
    return [check_no_compiler_messages ti_c64xp assembly {
        #if !defined(_TMS320C6400_PLUS)
        #error !_TMS320C6400_PLUS
        #endif
    }]
}


proc check_alpha_max_hw_available { } {
    return [check_runtime alpha_max_hw_available {
        int main() { return __builtin_alpha_amask(1<<8) != 0; }
    }]
}

# Returns true iff the FUNCTION is available on the target system.
# (This is essentially a Tcl implementation of Autoconf's
# AC_CHECK_FUNC.)

proc check_function_available { function } {
    return [check_no_compiler_messages ${function}_available \
                executable [subst {
        #ifdef __cplusplus
        extern "C"
        #endif
        char $function ();
        int main () { $function (); }
    }] "-fno-builtin" ]
}

# Returns true iff "fork" is available on the target system.

proc check_fork_available {} {
    return [check_function_available "fork"]
}

# Returns true iff "mkfifo" is available on the target system.

proc check_mkfifo_available {} {
    if { [istarget *-*-cygwin*] } {
       # Cygwin has mkfifo, but support is incomplete.
       return 0
     }

    return [check_function_available "mkfifo"]
}

# Returns true iff "__cxa_atexit" is used on the target system.

proc check_cxa_atexit_available { } {
    return [check_cached_effective_target cxa_atexit_available {
        if { [istarget hppa*-*-hpux10*] } {
            # HP-UX 10 doesn't have __cxa_atexit but subsequent test passes.
            expr 0
        } elseif { [istarget *-*-vxworks] } {
            # vxworks doesn't have __cxa_atexit but subsequent test passes.
            expr 0
        } else {
            check_runtime_nocache cxa_atexit_available {
                // C++
                #include <stdlib.h>
                static unsigned int count;
                struct X
                {
                  X() { count = 1; }
                  ~X()
                  {
                    if (count != 3)
                      exit(1);
                    count = 4;
                  }
                };
                void f()
                {
                  static X x;
                }
                struct Y
                {
                  Y() { f(); count = 2; }
                  ~Y()
                  {
                    if (count != 2)
                      exit(1);
                    count = 3;
                  }
                };
                Y y;
                int main() { return 0; }
            }
        }
    }]
}

proc check_effective_target_objc2 { } {
    return [check_no_compiler_messages objc2 object {
        #ifdef __OBJC2__
        int dummy[1];
        #else
        #error !__OBJC2__
        #endif
    }]
}

proc check_effective_target_next_runtime { } {
    return [check_no_compiler_messages objc2 object {
        #ifdef __NEXT_RUNTIME__
        int dummy[1];
        #else
        #error !__NEXT_RUNTIME__
        #endif
    }]
}

# Return 1 if we're generating code for big-endian memory order.

proc check_effective_target_be { } {
    return [check_no_compiler_messages be object {
        int dummy[__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ ? 1 : -1];
    }]
}

# Return 1 if we're generating code for little-endian memory order.

proc check_effective_target_le { } {
    return [check_no_compiler_messages le object {
        int dummy[__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ ? 1 : -1];
    }]
}

# Return 1 if we're generating 32-bit code using default options, 0
# otherwise.

proc check_effective_target_ilp32 { } {
    return [check_no_compiler_messages ilp32 object {
        int dummy[sizeof (int) == 4
                  && sizeof (void *) == 4
                  && sizeof (long) == 4 ? 1 : -1];
    }]
}

# Return 1 if we're generating ia32 code using default options, 0
# otherwise.

proc check_effective_target_ia32 { } {
    return [check_no_compiler_messages ia32 object {
        int dummy[sizeof (int) == 4
                  && sizeof (void *) == 4
                  && sizeof (long) == 4 ? 1 : -1] = { __i386__ };
    }]
}

# Return 1 if we're generating x32 code using default options, 0
# otherwise.

proc check_effective_target_x32 { } {
    return [check_no_compiler_messages x32 object {
        int dummy[sizeof (int) == 4
                  && sizeof (void *) == 4
                  && sizeof (long) == 4 ? 1 : -1] = { __x86_64__ };
    }]
}

# Return 1 if we're generating 32-bit integers using default
# options, 0 otherwise.

proc check_effective_target_int32 { } {
    return [check_no_compiler_messages int32 object {
        int dummy[sizeof (int) == 4 ? 1 : -1];
    }]
}

# Return 1 if we're generating 32-bit or larger integers using default
# options, 0 otherwise.

proc check_effective_target_int32plus { } {
    return [check_no_compiler_messages int32plus object {
        int dummy[sizeof (int) >= 4 ? 1 : -1];
    }]
}

# Return 1 if we're generating 32-bit or larger pointers using default
# options, 0 otherwise.

proc check_effective_target_ptr32plus { } {
    # The msp430 has 16-bit or 20-bit pointers.  The 20-bit pointer is stored
    # in a 32-bit slot when in memory, so sizeof(void *) returns 4, but it
    # cannot really hold a 32-bit address, so we always return false here.
    if { [istarget msp430-*-*] } {
        return 0
    }
 
    return [check_no_compiler_messages ptr32plus object {
        int dummy[sizeof (void *) >= 4 ? 1 : -1];
    }]
}

# Return 1 if we support 16-bit or larger array and structure sizes
# using default options, 0 otherwise.
# This implies at least a 20-bit address space, as no targets have an address
# space between 16 and 20 bits.

proc check_effective_target_size20plus { } {
    return [check_no_compiler_messages size20plus object {
        char dummy[65537L];
    }]
}

# Return 1 if we support 24-bit or larger array and structure sizes
# using default options, 0 otherwise.
# This implies at least a 32-bit address space, as no targets have an address
# space between 24 and 32 bits.

proc check_effective_target_size32plus { } {
    return [check_no_compiler_messages size32plus object {
        char dummy[16777217L];
    }]
}

# Returns 1 if we're generating 16-bit or smaller integers with the
# default options, 0 otherwise.

proc check_effective_target_int16 { } {
    return [check_no_compiler_messages int16 object {
        int dummy[sizeof (int) < 4 ? 1 : -1];
    }]
}

# Return 1 if we're generating 64-bit code using default options, 0
# otherwise.

proc check_effective_target_lp64 { } {
    return [check_no_compiler_messages lp64 object {
        int dummy[sizeof (int) == 4
                  && sizeof (void *) == 8
                  && sizeof (long) == 8 ? 1 : -1];
    }]
}

# Return 1 if we're generating 64-bit code using default llp64 options,
# 0 otherwise.

proc check_effective_target_llp64 { } {
    return [check_no_compiler_messages llp64 object {
        int dummy[sizeof (int) == 4
                  && sizeof (void *) == 8
                  && sizeof (long long) == 8
                  && sizeof (long) == 4 ? 1 : -1];
    }]
}

# Return 1 if long and int have different sizes,
# 0 otherwise.

proc check_effective_target_long_neq_int { } {
    return [check_no_compiler_messages long_ne_int object {
        int dummy[sizeof (int) != sizeof (long) ? 1 : -1];
    }]
}

# Return 1 if int size is equal to float size,
# 0 otherwise.

proc check_effective_target_int_eq_float { } {
    return [check_no_compiler_messages int_eq_float object {
        int dummy[sizeof (int) >= sizeof (float) ? 1 : -1];
    }]
}

# Return 1 if pointer size is equal to long size,
# 0 otherwise.

proc check_effective_target_ptr_eq_long { } {
    # sizeof (void *) == 4 for msp430-elf -mlarge which is equal to
    # sizeof (long). Avoid false positive.
    if { [istarget msp430-*-*] } {
        return 0
    }
    return [check_no_compiler_messages ptr_eq_long object {
        int dummy[sizeof (void *) == sizeof (long) ? 1 : -1];
    }]
}

# Return 1 if the target supports long double larger than double,
# 0 otherwise.

proc check_effective_target_large_long_double { } {
    return [check_no_compiler_messages large_long_double object {
        int dummy[sizeof(long double) > sizeof(double) ? 1 : -1];
    }]
}

# Return 1 if the target supports double larger than float,
# 0 otherwise.

proc check_effective_target_large_double { } {
    return [check_no_compiler_messages large_double object {
        int dummy[sizeof(double) > sizeof(float) ? 1 : -1];
    }]
}

# Return 1 if the target supports long double of 128 bits,
# 0 otherwise.

proc check_effective_target_longdouble128 { } {
    return [check_no_compiler_messages longdouble128 object {
        int dummy[sizeof(long double) == 16 ? 1 : -1];
    }]
}

# Return 1 if the target supports long double of 64 bits,
# 0 otherwise.

proc check_effective_target_longdouble64 { } {
    return [check_no_compiler_messages longdouble64 object {
        int dummy[sizeof(long double) == 8 ? 1 : -1];
    }]
}

# Return 1 if the target supports double of 64 bits,
# 0 otherwise.

proc check_effective_target_double64 { } {
    return [check_no_compiler_messages double64 object {
        int dummy[sizeof(double) == 8 ? 1 : -1];
    }]
}

# Return 1 if the target supports double of at least 64 bits,
# 0 otherwise.

proc check_effective_target_double64plus { } {
    return [check_no_compiler_messages double64plus object {
        int dummy[sizeof(double) >= 8 ? 1 : -1];
    }]
}

# Return 1 if the target supports 'w' suffix on floating constant
# 0 otherwise.

proc check_effective_target_has_w_floating_suffix { } {
    set opts ""
    if [check_effective_target_c++] {
        append opts "-std=gnu++03"
    }
    return [check_no_compiler_messages w_fp_suffix object {
        float dummy = 1.0w;
    } "$opts"]
}

# Return 1 if the target supports 'q' suffix on floating constant
# 0 otherwise.

proc check_effective_target_has_q_floating_suffix { } {
    set opts ""
    if [check_effective_target_c++] {
        append opts "-std=gnu++03"
    }
    return [check_no_compiler_messages q_fp_suffix object {
        float dummy = 1.0q;
    } "$opts"]
}

# Return 1 if the target supports the _FloatN / _FloatNx type
# indicated in the function name, 0 otherwise.

proc check_effective_target_float16 {} {
    return [check_no_compiler_messages_nocache float16 object {
        _Float16 x;
    } [add_options_for_float16 ""]]
}

proc check_effective_target_float32 {} {
    return [check_no_compiler_messages_nocache float32 object {
        _Float32 x;
    } [add_options_for_float32 ""]]
}

proc check_effective_target_float64 {} {
    return [check_no_compiler_messages_nocache float64 object {
        _Float64 x;
    } [add_options_for_float64 ""]]
}

proc check_effective_target_float128 {} {
    return [check_no_compiler_messages_nocache float128 object {
        _Float128 x;
    } [add_options_for_float128 ""]]
}

proc check_effective_target_float32x {} {
    return [check_no_compiler_messages_nocache float32x object {
        _Float32x x;
    } [add_options_for_float32x ""]]
}

proc check_effective_target_float64x {} {
    return [check_no_compiler_messages_nocache float64x object {
        _Float64x x;
    } [add_options_for_float64x ""]]
}

proc check_effective_target_float128x {} {
    return [check_no_compiler_messages_nocache float128x object {
        _Float128x x;
    } [add_options_for_float128x ""]]
}

# Likewise, but runtime support for any special options used as well
# as compile-time support is required.

proc check_effective_target_float16_runtime {} {
    return [check_effective_target_float16]
}

proc check_effective_target_float32_runtime {} {
    return [check_effective_target_float32]
}

proc check_effective_target_float64_runtime {} {
    return [check_effective_target_float64]
}

proc check_effective_target_float128_runtime {} {
    if { ![check_effective_target_float128] } {
        return 0
    }
    if { [istarget powerpc*-*-*] } {
        return [check_effective_target_base_quadfloat_support]
    }
    return 1
}

proc check_effective_target_float32x_runtime {} {
    return [check_effective_target_float32x]
}

proc check_effective_target_float64x_runtime {} {
    if { ![check_effective_target_float64x] } {
        return 0
    }
    if { [istarget powerpc*-*-*] } {
        return [check_effective_target_base_quadfloat_support]
    }
    return 1
}

proc check_effective_target_float128x_runtime {} {
    return [check_effective_target_float128x]
}

# Return 1 if the target hardware supports any options added for
# _FloatN and _FloatNx types, 0 otherwise.

proc check_effective_target_floatn_nx_runtime {} {
    if { [istarget powerpc*-*-aix*] } {
        return 0
    }
    if { [istarget powerpc*-*-*] } {
        return [check_effective_target_base_quadfloat_support]
    }
    return 1
}

# Add options needed to use the _FloatN / _FloatNx type indicated in
# the function name.

proc add_options_for_float16 { flags } {
    if { [istarget arm*-*-*] } {
        return "$flags -mfp16-format=ieee"
    }
    return "$flags"
}

proc add_options_for_float32 { flags } {
    return "$flags"
}

proc add_options_for_float64 { flags } {
    return "$flags"
}

proc add_options_for_float128 { flags } {
    return [add_options_for___float128 "$flags"]
}

proc add_options_for_float32x { flags } {
    return "$flags"
}

proc add_options_for_float64x { flags } {
    return [add_options_for___float128 "$flags"]
}

proc add_options_for_float128x { flags } {
    return "$flags"
}

# Return 1 if the target supports __float128,
# 0 otherwise.

proc check_effective_target___float128 { } {
    if { [istarget powerpc*-*-*] } {
        return [check_ppc_float128_sw_available]
    }
    if { [istarget ia64-*-*]
         || [istarget i?86-*-*] || [istarget x86_64-*-*] } {
        return 1
    }
    return 0
}

proc add_options_for___float128 { flags } {
    if { [istarget powerpc*-*-*] } {
        return "$flags -mfloat128 -mvsx"
    }
    return "$flags"
}

# Return 1 if the target supports any special run-time requirements
# for __float128 or _Float128,
# 0 otherwise.

proc check_effective_target_base_quadfloat_support { } {
    if { [istarget powerpc*-*-*] } {
        return [check_vsx_hw_available]
    }
    return 1
}

# Return 1 if the target supports all four forms of fused multiply-add
# (fma, fms, fnma, and fnms) for both float and double.

proc check_effective_target_scalar_all_fma { } {
    return [istarget aarch64*-*-*]
}

# Return 1 if the target supports compiling fixed-point,
# 0 otherwise.

proc check_effective_target_fixed_point { } {
    return [check_no_compiler_messages fixed_point object {
        _Sat _Fract x; _Sat _Accum y;
    }]
}

# Return 1 if the target supports compiling decimal floating point,
# 0 otherwise.

proc check_effective_target_dfp_nocache { } {
    verbose "check_effective_target_dfp_nocache: compiling source" 2
    set ret [check_no_compiler_messages_nocache dfp object {
        float x __attribute__((mode(DD)));
    }]
    verbose "check_effective_target_dfp_nocache: returning $ret" 2
    return $ret
}

proc check_effective_target_dfprt_nocache { } {
    return [check_runtime_nocache dfprt {
        typedef float d64 __attribute__((mode(DD)));
        d64 x = 1.2df, y = 2.3dd, z;
        int main () { z = x + y; return 0; }
    }]
}

# Return 1 if the target supports compiling Decimal Floating Point,
# 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_dfp { } {
    return [check_cached_effective_target dfp {
        check_effective_target_dfp_nocache
    }]
}

# Return 1 if the target supports linking and executing Decimal Floating
# Point, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_dfprt { } {
    return [check_cached_effective_target dfprt {
        check_effective_target_dfprt_nocache
    }]
}

proc check_effective_target_powerpc_popcntb_ok { } {
    return [check_cached_effective_target powerpc_popcntb_ok {

        # Disable on Darwin.
        if { [istarget powerpc-*-eabi] || [istarget powerpc*-*-eabispe] || [istarget *-*-darwin*]} {
            expr 0
        } else {
            check_runtime_nocache powerpc_popcntb_ok {
                volatile int r;
                volatile int a = 0x12345678;
                int main()
                {
                    asm volatile ("popcntb %0,%1" : "=r" (r) : "r" (a));
                    return 0;
                }
            } "-mcpu=power5"
        }
    }]
}

# Return 1 if the target supports executing DFP hardware instructions,
# 0 otherwise.  Cache the result.

proc check_dfp_hw_available { } {
    return [check_cached_effective_target dfp_hw_available {
        # For now, disable on Darwin
        if { [istarget powerpc-*-eabi] || [istarget powerpc*-*-eabispe] || [istarget *-*-darwin*]} {
            expr 0
        } else {
            check_runtime_nocache dfp_hw_available {
                volatile _Decimal64 r;
                volatile _Decimal64 a = 4.0DD;
                volatile _Decimal64 b = 2.0DD;
                int main()
                {
                  asm volatile ("dadd %0,%1,%2" : "=d" (r) : "d" (a), "d" (b));
                  asm volatile ("dsub %0,%1,%2" : "=d" (r) : "d" (a), "d" (b));
                  asm volatile ("dmul %0,%1,%2" : "=d" (r) : "d" (a), "d" (b));
                  asm volatile ("ddiv %0,%1,%2" : "=d" (r) : "d" (a), "d" (b));
                  return 0;
                }
            } "-mcpu=power6 -mhard-float"
        }
    }]
}

# Return 1 if the target supports compiling and assembling UCN, 0 otherwise.

proc check_effective_target_ucn_nocache { } {
    # -std=c99 is only valid for C
    if [check_effective_target_c] {
        set ucnopts "-std=c99"
    } else {
        set ucnopts ""
    }
    verbose "check_effective_target_ucn_nocache: compiling source" 2
    set ret [check_no_compiler_messages_nocache ucn object {
        int \u00C0;
    } $ucnopts]
    verbose "check_effective_target_ucn_nocache: returning $ret" 2
    return $ret
}

# Return 1 if the target supports compiling and assembling UCN, 0 otherwise.
#
# This won't change for different subtargets, so cache the result.

proc check_effective_target_ucn { } {
    return [check_cached_effective_target ucn {
        check_effective_target_ucn_nocache
    }]
}

# Return 1 if the target needs a command line argument to enable a SIMD
# instruction set.

proc check_effective_target_vect_cmdline_needed { } {
    global et_vect_cmdline_needed_target_name

    if { ![info exists et_vect_cmdline_needed_target_name] } {
        set et_vect_cmdline_needed_target_name ""
    }

    # If the target has changed since we set the cached value, clear it.
    set current_target [current_target_name]
    if { $current_target != $et_vect_cmdline_needed_target_name } {
        verbose "check_effective_target_vect_cmdline_needed: `$et_vect_cmdline_needed_target_name' `$current_target'" 2
        set et_vect_cmdline_needed_target_name $current_target
        if { [info exists et_vect_cmdline_needed_saved] } {
            verbose "check_effective_target_vect_cmdline_needed: removing cached result" 2
            unset et_vect_cmdline_needed_saved
        }
    }

    return [check_cached_effective_target vect_cmdline_needed {
        if { [istarget alpha*-*-*]
             || [istarget ia64-*-*]
             || (([istarget i?86-*-*] || [istarget x86_64-*-*])
                 && ![is-effective-target ia32])
             || ([istarget powerpc*-*-*]
                 && ([check_effective_target_powerpc_spe]
                     || [check_effective_target_powerpc_altivec]))
             || ([istarget sparc*-*-*] && [check_effective_target_sparc_vis])
             || [istarget spu-*-*]
             || ([istarget arm*-*-*] && [check_effective_target_arm_neon])
             || [istarget aarch64*-*-*] } {
            return 0
        } else {
            return 1
        }}]
}

# Return 1 if the target supports hardware vectors of int, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_int { } {
    return [check_cached_effective_target_indexed vect_int {
      expr {
         [istarget i?86-*-*] || [istarget x86_64-*-*]
         || ([istarget powerpc*-*-*]
             && ![istarget powerpc-*-linux*paired*])
         || [istarget spu-*-*]
         || [istarget sparc*-*-*]
         || [istarget alpha*-*-*]
         || [istarget ia64-*-*]
         || [istarget aarch64*-*-*]
         || [is-effective-target arm_neon]
         || ([istarget mips*-*-*]
             && ([et-is-effective-target mips_loongson_mmi]
             || [et-is-effective-target mips_msa]))
         || ([istarget s390*-*-*]
             && [check_effective_target_s390_vx])
        }}]
}

# Return 1 if the target supports signed int->float conversion 
#

proc check_effective_target_vect_intfloat_cvt { } {
    return [check_cached_effective_target_indexed vect_intfloat_cvt {
      expr { [istarget i?86-*-*] || [istarget x86_64-*-*]
             || ([istarget powerpc*-*-*]
                 && ![istarget powerpc-*-linux*paired*])
             || [is-effective-target arm_neon]
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa]) }}]
}

# Return 1 if the target supports signed double->int conversion
#

proc check_effective_target_vect_doubleint_cvt { } {
    return [check_cached_effective_target_indexed vect_doubleint_cvt {
      expr { (([istarget i?86-*-*] || [istarget x86_64-*-*])
               && [check_no_compiler_messages vect_doubleint_cvt assembly {
                   #ifdef __tune_atom__
                   # error No double vectorizer support.
                   #endif
              }])
            || [istarget aarch64*-*-*]
            || [istarget spu-*-*]
            || ([istarget powerpc*-*-*] && [check_vsx_hw_available])
            || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa]) }}]
}

# Return 1 if the target supports signed int->double conversion
#

proc check_effective_target_vect_intdouble_cvt { } {
    return [check_cached_effective_target_indexed vect_intdouble_cvt {
      expr { (([istarget i?86-*-*] || [istarget x86_64-*-*])
              && [check_no_compiler_messages vect_intdouble_cvt assembly {
                  #ifdef __tune_atom__
                  # error No double vectorizer support.
                  #endif
              }])
             || [istarget aarch64*-*-*]
             || [istarget spu-*-*]
             || ([istarget powerpc*-*-*] && [check_vsx_hw_available])
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa]) }}]
}

#Return 1 if we're supporting __int128 for target, 0 otherwise.

proc check_effective_target_int128 { } {
    return [check_no_compiler_messages int128 object {
        int dummy[
        #ifndef __SIZEOF_INT128__
        -1
        #else
        1
        #endif
        ];
    }]
}

# Return 1 if the target supports unsigned int->float conversion 
#

proc check_effective_target_vect_uintfloat_cvt { } {
    return [check_cached_effective_target_indexed vect_uintfloat_cvt {
      expr { [istarget i?86-*-*] || [istarget x86_64-*-*]
             || ([istarget powerpc*-*-*]
                 && ![istarget powerpc-*-linux*paired*])
             || [istarget aarch64*-*-*]
             || [is-effective-target arm_neon]
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa]) }}]
}


# Return 1 if the target supports signed float->int conversion
#

proc check_effective_target_vect_floatint_cvt { } {
    return [check_cached_effective_target_indexed vect_floatint_cvt {
      expr { [istarget i?86-*-*] || [istarget x86_64-*-*]
             || ([istarget powerpc*-*-*]
                 && ![istarget powerpc-*-linux*paired*])
             || [is-effective-target arm_neon]
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa]) }}]
}

# Return 1 if the target supports unsigned float->int conversion
#

proc check_effective_target_vect_floatuint_cvt { } {
    return [check_cached_effective_target_indexed vect_floatuint_cvt {
      expr { ([istarget powerpc*-*-*]
              && ![istarget powerpc-*-linux*paired*])
            || [is-effective-target arm_neon]
            || ([istarget mips*-*-*]
                && [et-is-effective-target mips_msa]) }}]
}

# Return 1 if peeling for alignment might be profitable on the target
#

proc check_effective_target_vect_peeling_profitable { } {
    return [check_cached_effective_target_indexed vect_peeling_profitable {
      expr { ([istarget s390*-*-*]
              && [check_effective_target_s390_vx])
            || [check_effective_target_vect_element_align_preferred] }}]
}

# Return 1 if the target supports #pragma omp declare simd, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_simd_clones { } {
    # On i?86/x86_64 #pragma omp declare simd builds a sse2, avx,
    # avx2 and avx512f clone.  Only the right clone for the
    # specified arch will be chosen, but still we need to at least
    # be able to assemble avx512f.
    return [check_cached_effective_target_indexed vect_simd_clones {
      expr { (([istarget i?86-*-*] || [istarget x86_64-*-*])
              && [check_effective_target_avx512f]) }}]
}

# Return 1 if this is a AArch64 target supporting big endian
proc check_effective_target_aarch64_big_endian { } {
    return [check_no_compiler_messages aarch64_big_endian assembly {
        #if !defined(__aarch64__) || !defined(__AARCH64EB__)
        #error !__aarch64__ || !__AARCH64EB__
        #endif
    }]
}

# Return 1 if this is a AArch64 target supporting little endian
proc check_effective_target_aarch64_little_endian { } {
    if { ![istarget aarch64*-*-*] } {
        return 0
    }

    return [check_no_compiler_messages aarch64_little_endian assembly {
        #if !defined(__aarch64__) || defined(__AARCH64EB__)
        #error FOO
        #endif
    }]
}

# Return 1 if this is an AArch64 target supporting SVE.
proc check_effective_target_aarch64_sve { } {
    if { ![istarget aarch64*-*-*] } {
        return 0
    }
    return [check_no_compiler_messages aarch64_sve assembly {
        #if !defined (__ARM_FEATURE_SVE)
        #error FOO
        #endif
    }]
}

# Return the size in bits of an SVE vector, or 0 if the size is variable.
proc aarch64_sve_bits { } {
    return [check_cached_effective_target aarch64_sve_bits {
        global tool

        set src dummy[pid].c
        set f [open $src "w"]
        puts $f "int bits = __ARM_FEATURE_SVE_BITS;"
        close $f
        set output [${tool}_target_compile $src "" preprocess ""]
        file delete $src

        regsub {.*bits = ([^;]*);.*} $output {\1} bits
        expr { $bits }
    }]
}

# Return 1 if this is a compiler supporting ARC atomic operations
proc check_effective_target_arc_atomic { } {
    return [check_no_compiler_messages arc_atomic assembly {
        #if !defined(__ARC_ATOMIC__)
        #error FOO
        #endif
    }]
}

# Return 1 if this is an arm target using 32-bit instructions
proc check_effective_target_arm32 { } {
    if { ![istarget arm*-*-*] } {
        return 0
    }

    return [check_no_compiler_messages arm32 assembly {
        #if !defined(__arm__) || (defined(__thumb__) && !defined(__thumb2__))
        #error !__arm || __thumb__ && !__thumb2__
        #endif
    }]
}

# Return 1 if this is an arm target not using Thumb
proc check_effective_target_arm_nothumb { } {
    if { ![istarget arm*-*-*] } {
        return 0
    }

    return [check_no_compiler_messages arm_nothumb assembly {
        #if !defined(__arm__) || (defined(__thumb__) || defined(__thumb2__))
        #error !__arm__ || __thumb || __thumb2__
        #endif
    }]
}

# Return 1 if this is a little-endian ARM target
proc check_effective_target_arm_little_endian { } {
    if { ![istarget arm*-*-*] } {
        return 0
    }

    return [check_no_compiler_messages arm_little_endian assembly {
        #if !defined(__arm__) || !defined(__ARMEL__)
        #error !__arm__ || !__ARMEL__
        #endif
    }]
}

# Return 1 if this is an ARM target that only supports aligned vector accesses
proc check_effective_target_arm_vect_no_misalign { } {
    if { ![istarget arm*-*-*] } {
        return 0
    }

    return [check_no_compiler_messages arm_vect_no_misalign assembly {
        #if !defined(__arm__) \
            || (defined(__ARM_FEATURE_UNALIGNED) \
                && defined(__ARMEL__))
        #error !__arm__ || (__ARMEL__ && __ARM_FEATURE_UNALIGNED)
        #endif
    }]
}


# Return 1 if this is an ARM target supporting -mfloat-abi=soft.  Some
# multilibs may be incompatible with this option.

proc check_effective_target_arm_soft_ok { } {
    if { [check_effective_target_arm32] } {
        return [check_no_compiler_messages arm_soft_ok executable {
            int main() { return 0;}
        } "-mfloat-abi=soft"]
    } else {
        return 0
    }
}

# Return 1 if this is an ARM target supporting -mfpu=vfp
# -mfloat-abi=softfp.  Some multilibs may be incompatible with these
# options.

proc check_effective_target_arm_vfp_ok { } {
    if { [check_effective_target_arm32] } {
        return [check_no_compiler_messages arm_vfp_ok object {
            int dummy;
        } "-mfpu=vfp -mfloat-abi=softfp"]
    } else {
        return 0
    }
}

# Return 1 if this is an ARM target supporting -mfpu=vfp3
# -mfloat-abi=softfp.

proc check_effective_target_arm_vfp3_ok { } {
    if { [check_effective_target_arm32] } {
        return [check_no_compiler_messages arm_vfp3_ok object {
            int dummy;
        } "-mfpu=vfp3 -mfloat-abi=softfp"]
    } else {
        return 0
    }
}

# Return 1 if this is an ARM target supporting -mfpu=fp-armv8
# -mfloat-abi=softfp.
proc check_effective_target_arm_v8_vfp_ok {} {
    if { [check_effective_target_arm32] } {
        return [check_no_compiler_messages arm_v8_vfp_ok object {
          int foo (void)
          {
             __asm__ volatile ("vrinta.f32.f32 s0, s0");
             return 0;
          }
        } "-mfpu=fp-armv8 -mfloat-abi=softfp"]
    } else {
        return 0
    }
}

# Return 1 if this is an ARM target supporting -mfpu=vfp
# -mfloat-abi=hard.  Some multilibs may be incompatible with these
# options.

proc check_effective_target_arm_hard_vfp_ok { } {
    if { [check_effective_target_arm32]
         && ! [check-flags [list "" { *-*-* } { "-mfloat-abi=*" } { "-mfloat-abi=hard" }]] } {
        return [check_no_compiler_messages arm_hard_vfp_ok executable {
            int main() { return 0;}
        } "-mfpu=vfp -mfloat-abi=hard"]
    } else {
        return 0
    }
}

# Return 1 if this is an ARM target defining __ARM_FP. We may need
# -mfloat-abi=softfp or equivalent options.  Some multilibs may be
# incompatible with these options.  Also set et_arm_fp_flags to the
# best options to add.

proc check_effective_target_arm_fp_ok_nocache { } {
    global et_arm_fp_flags
    set et_arm_fp_flags ""
    if { [check_effective_target_arm32] } {
        foreach flags {"" "-mfloat-abi=softfp" "-mfloat-abi=hard"} {
            if { [check_no_compiler_messages_nocache arm_fp_ok object {
                #ifndef __ARM_FP
                #error __ARM_FP not defined
                #endif
            } "$flags"] } {
                set et_arm_fp_flags $flags
                return 1
            }
        }
    }

    return 0
}

proc check_effective_target_arm_fp_ok { } {
    return [check_cached_effective_target arm_fp_ok \
                check_effective_target_arm_fp_ok_nocache]
}

# Add the options needed to define __ARM_FP.  We need either
# -mfloat-abi=softfp or -mfloat-abi=hard, but if one is already
# specified by the multilib, use it.

proc add_options_for_arm_fp { flags } {
    if { ! [check_effective_target_arm_fp_ok] } {
        return "$flags"
    }
    global et_arm_fp_flags
    return "$flags $et_arm_fp_flags"
}

# Return 1 if this is an ARM target that supports DSP multiply with
# current multilib flags.

proc check_effective_target_arm_dsp { } {
    return [check_no_compiler_messages arm_dsp assembly {
        #ifndef __ARM_FEATURE_DSP
        #error not DSP
        #endif
        int i;
    }]
}

# Return 1 if this is an ARM target that supports unaligned word/halfword
# load/store instructions.

proc check_effective_target_arm_unaligned { } {
    return [check_no_compiler_messages arm_unaligned assembly {
        #ifndef __ARM_FEATURE_UNALIGNED
        #error no unaligned support
        #endif
        int i;
    }]
}

# Return 1 if this is an ARM target supporting -mfpu=crypto-neon-fp-armv8
# -mfloat-abi=softfp or equivalent options.  Some multilibs may be
# incompatible with these options.  Also set et_arm_crypto_flags to the
# best options to add.

proc check_effective_target_arm_crypto_ok_nocache { } {
    global et_arm_crypto_flags
    set et_arm_crypto_flags ""
    if { [check_effective_target_arm_v8_neon_ok] } {
        foreach flags {"" "-mfloat-abi=softfp" "-mfpu=crypto-neon-fp-armv8" "-mfpu=crypto-neon-fp-armv8 -mfloat-abi=softfp"} {
            if { [check_no_compiler_messages_nocache arm_crypto_ok object {
                #include "arm_neon.h"
                uint8x16_t
                foo (uint8x16_t a, uint8x16_t b)
                {
                  return vaeseq_u8 (a, b);
                }
            } "$flags"] } {
                set et_arm_crypto_flags $flags
                return 1
            }
        }
    }

    return 0
}

# Return 1 if this is an ARM target supporting -mfpu=crypto-neon-fp-armv8

proc check_effective_target_arm_crypto_ok { } {
    return [check_cached_effective_target arm_crypto_ok \
                check_effective_target_arm_crypto_ok_nocache]
}

# Add options for crypto extensions.
proc add_options_for_arm_crypto { flags } {
    if { ! [check_effective_target_arm_crypto_ok] } {
        return "$flags"
    }
    global et_arm_crypto_flags
    return "$flags $et_arm_crypto_flags"
}

# Add the options needed for NEON.  We need either -mfloat-abi=softfp
# or -mfloat-abi=hard, but if one is already specified by the
# multilib, use it.  Similarly, if a -mfpu option already enables
# NEON, do not add -mfpu=neon.

proc add_options_for_arm_neon { flags } {
    if { ! [check_effective_target_arm_neon_ok] } {
        return "$flags"
    }
    global et_arm_neon_flags
    return "$flags $et_arm_neon_flags"
}

proc add_options_for_arm_v8_vfp { flags } {
    if { ! [check_effective_target_arm_v8_vfp_ok] } {
        return "$flags"
    }
    return "$flags -mfpu=fp-armv8 -mfloat-abi=softfp"
}

proc add_options_for_arm_v8_neon { flags } {
    if { ! [check_effective_target_arm_v8_neon_ok] } {
        return "$flags"
    }
    global et_arm_v8_neon_flags
    return "$flags $et_arm_v8_neon_flags -march=armv8-a"
}

# Add the options needed for ARMv8.1 Adv.SIMD.  Also adds the ARMv8 NEON
# options for AArch64 and for ARM.

proc add_options_for_arm_v8_1a_neon { flags } {
    if { ! [check_effective_target_arm_v8_1a_neon_ok] } {
        return "$flags"
    }
    global et_arm_v8_1a_neon_flags
    return "$flags $et_arm_v8_1a_neon_flags"
}

# Add the options needed for ARMv8.2 with the scalar FP16 extension.
# Also adds the ARMv8 FP options for ARM and for AArch64.

proc add_options_for_arm_v8_2a_fp16_scalar { flags } {
    if { ! [check_effective_target_arm_v8_2a_fp16_scalar_ok] } {
        return "$flags"
    }
    global et_arm_v8_2a_fp16_scalar_flags
    return "$flags $et_arm_v8_2a_fp16_scalar_flags"
}

# Add the options needed for ARMv8.2 with the FP16 extension.  Also adds
# the ARMv8 NEON options for ARM and for AArch64.

proc add_options_for_arm_v8_2a_fp16_neon { flags } {
    if { ! [check_effective_target_arm_v8_2a_fp16_neon_ok] } {
        return "$flags"
    }
    global et_arm_v8_2a_fp16_neon_flags
    return "$flags $et_arm_v8_2a_fp16_neon_flags"
}

proc add_options_for_arm_crc { flags } {
    if { ! [check_effective_target_arm_crc_ok] } {
        return "$flags"
    }
    global et_arm_crc_flags
    return "$flags $et_arm_crc_flags"
}

# Add the options needed for NEON.  We need either -mfloat-abi=softfp
# or -mfloat-abi=hard, but if one is already specified by the
# multilib, use it.  Similarly, if a -mfpu option already enables
# NEON, do not add -mfpu=neon.

proc add_options_for_arm_neonv2 { flags } {
    if { ! [check_effective_target_arm_neonv2_ok] } {
        return "$flags"
    }
    global et_arm_neonv2_flags
    return "$flags $et_arm_neonv2_flags"
}

# Add the options needed for vfp3.
proc add_options_for_arm_vfp3 { flags } {
    if { ! [check_effective_target_arm_vfp3_ok] } {
        return "$flags"
    }
    return "$flags -mfpu=vfp3 -mfloat-abi=softfp"
}

# Return 1 if this is an ARM target supporting -mfpu=neon
# -mfloat-abi=softfp or equivalent options.  Some multilibs may be
# incompatible with these options.  Also set et_arm_neon_flags to the
# best options to add.

proc check_effective_target_arm_neon_ok_nocache { } {
    global et_arm_neon_flags
    set et_arm_neon_flags ""
    if { [check_effective_target_arm32] } {
        foreach flags {"" "-mfloat-abi=softfp" "-mfpu=neon" "-mfpu=neon -mfloat-abi=softfp" "-mfpu=neon -mfloat-abi=softfp -march=armv7-a" "-mfloat-abi=hard" "-mfpu=neon -mfloat-abi=hard" "-mfpu=neon -mfloat-abi=hard -march=armv7-a"} {
            if { [check_no_compiler_messages_nocache arm_neon_ok object {
                #include <arm_neon.h>
                int dummy;
                #ifndef __ARM_NEON__
                #error not NEON
                #endif
                /* Avoid the case where a test adds -mfpu=neon, but the toolchain is
                   configured for -mcpu=arm926ej-s, for example.  */
                #if __ARM_ARCH < 7 || __ARM_ARCH_PROFILE == 'M'
                #error Architecture does not support NEON.
                #endif
            } "$flags"] } {
                set et_arm_neon_flags $flags
                return 1
            }
        }
    }

    return 0
}

proc check_effective_target_arm_neon_ok { } {
    return [check_cached_effective_target arm_neon_ok \
                check_effective_target_arm_neon_ok_nocache]
}

# Return 1 if this is an ARM target supporting -mfpu=neon without any
# -mfloat-abi= option.  Useful in tests where add_options is not
# supported (such as lto tests).

proc check_effective_target_arm_neon_ok_no_float_abi_nocache { } {
    if { [check_effective_target_arm32] } {
        foreach flags {"-mfpu=neon"} {
            if { [check_no_compiler_messages_nocache arm_neon_ok_no_float_abi object {
                #include <arm_neon.h>
                int dummy;
                #ifndef __ARM_NEON__
                #error not NEON
                #endif
                /* Avoid the case where a test adds -mfpu=neon, but the toolchain is
                   configured for -mcpu=arm926ej-s, for example.  */
                #if __ARM_ARCH < 7 || __ARM_ARCH_PROFILE == 'M'
                #error Architecture does not support NEON.
                #endif
            } "$flags"] } {
                return 1
            }
        }
    }

    return 0
}

proc check_effective_target_arm_neon_ok_no_float_abi { } {
    return [check_cached_effective_target arm_neon_ok_no_float_abi \
                check_effective_target_arm_neon_ok_no_float_abi_nocache]
}

proc check_effective_target_arm_crc_ok_nocache { } {
    global et_arm_crc_flags
    set et_arm_crc_flags "-march=armv8-a+crc"
    return [check_no_compiler_messages_nocache arm_crc_ok object {
        #if !defined (__ARM_FEATURE_CRC32)
        #error FOO
        #endif
    } "$et_arm_crc_flags"]
}

proc check_effective_target_arm_crc_ok { } {
    return [check_cached_effective_target arm_crc_ok \
                check_effective_target_arm_crc_ok_nocache]
}

# Return 1 if this is an ARM target supporting -mfpu=neon-fp16
# -mfloat-abi=softfp or equivalent options.  Some multilibs may be
# incompatible with these options.  Also set et_arm_neon_fp16_flags to
# the best options to add.

proc check_effective_target_arm_neon_fp16_ok_nocache { } {
    global et_arm_neon_fp16_flags
    global et_arm_neon_flags
    set et_arm_neon_fp16_flags ""
    if { [check_effective_target_arm32]
         && [check_effective_target_arm_neon_ok] } {
        foreach flags {"" "-mfloat-abi=softfp" "-mfpu=neon-fp16"
                       "-mfpu=neon-fp16 -mfloat-abi=softfp"
                       "-mfp16-format=ieee"
                       "-mfloat-abi=softfp -mfp16-format=ieee"
                       "-mfpu=neon-fp16 -mfp16-format=ieee"
                       "-mfpu=neon-fp16 -mfloat-abi=softfp -mfp16-format=ieee"} {
            if { [check_no_compiler_messages_nocache arm_neon_fp16_ok object {
                #include "arm_neon.h"
                float16x4_t
                foo (float32x4_t arg)
                {
                  return vcvt_f16_f32 (arg);
                }
            } "$et_arm_neon_flags $flags"] } {
                set et_arm_neon_fp16_flags [concat $et_arm_neon_flags $flags]
                return 1
            }
        }
    }

    return 0
}

proc check_effective_target_arm_neon_fp16_ok { } {
    return [check_cached_effective_target arm_neon_fp16_ok \
                check_effective_target_arm_neon_fp16_ok_nocache]
}

proc check_effective_target_arm_neon_fp16_hw { } {
    if {! [check_effective_target_arm_neon_fp16_ok] } {
        return 0
    }
    global et_arm_neon_fp16_flags
    check_runtime_nocache arm_neon_fp16_hw {
        int
        main (int argc, char **argv)
        {
          asm ("vcvt.f32.f16 q1, d0");
          return 0;
        }
    } $et_arm_neon_fp16_flags
}

proc add_options_for_arm_neon_fp16 { flags } {
    if { ! [check_effective_target_arm_neon_fp16_ok] } {
        return "$flags"
    }
    global et_arm_neon_fp16_flags
    return "$flags $et_arm_neon_fp16_flags"
}

# Return 1 if this is an ARM target supporting the FP16 alternative
# format.  Some multilibs may be incompatible with the options needed.  Also
# set et_arm_neon_fp16_flags to the best options to add.

proc check_effective_target_arm_fp16_alternative_ok_nocache { } {
    global et_arm_neon_fp16_flags
    set et_arm_neon_fp16_flags ""
    if { [check_effective_target_arm32] } {
        foreach flags {"" "-mfloat-abi=softfp" "-mfpu=neon-fp16"
                       "-mfpu=neon-fp16 -mfloat-abi=softfp"} {
            if { [check_no_compiler_messages_nocache \
                      arm_fp16_alternative_ok object {
                #if !defined (__ARM_FP16_FORMAT_ALTERNATIVE)
                #error __ARM_FP16_FORMAT_ALTERNATIVE not defined
                #endif
            } "$flags -mfp16-format=alternative"] } {
                set et_arm_neon_fp16_flags "$flags -mfp16-format=alternative"
                return 1
            }
        }
    }

    return 0
}

proc check_effective_target_arm_fp16_alternative_ok { } {
    return [check_cached_effective_target arm_fp16_alternative_ok \
                check_effective_target_arm_fp16_alternative_ok_nocache]
}

# Return 1 if this is an ARM target supports specifying the FP16 none
# format.  Some multilibs may be incompatible with the options needed.

proc check_effective_target_arm_fp16_none_ok_nocache { } {
    if { [check_effective_target_arm32] } {
        foreach flags {"" "-mfloat-abi=softfp" "-mfpu=neon-fp16"
                       "-mfpu=neon-fp16 -mfloat-abi=softfp"} {
            if { [check_no_compiler_messages_nocache \
                      arm_fp16_none_ok object {
                #if defined (__ARM_FP16_FORMAT_ALTERNATIVE)
                #error __ARM_FP16_FORMAT_ALTERNATIVE defined
                #endif
                #if defined (__ARM_FP16_FORMAT_IEEE)
                #error __ARM_FP16_FORMAT_IEEE defined
                #endif
            } "$flags -mfp16-format=none"] } {
                return 1
            }
        }
    }

    return 0
}

proc check_effective_target_arm_fp16_none_ok { } {
    return [check_cached_effective_target arm_fp16_none_ok \
                check_effective_target_arm_fp16_none_ok_nocache]
}

# Return 1 if this is an ARM target supporting -mfpu=neon-fp-armv8
# -mfloat-abi=softfp or equivalent options.  Some multilibs may be
# incompatible with these options.  Also set et_arm_v8_neon_flags to the
# best options to add.

proc check_effective_target_arm_v8_neon_ok_nocache { } {
    global et_arm_v8_neon_flags
    set et_arm_v8_neon_flags ""
    if { [check_effective_target_arm32] } {
        foreach flags {"" "-mfloat-abi=softfp" "-mfpu=neon-fp-armv8" "-mfpu=neon-fp-armv8 -mfloat-abi=softfp"} {
            if { [check_no_compiler_messages_nocache arm_v8_neon_ok object {
                #if __ARM_ARCH < 8
                #error not armv8 or later
                #endif
                #include "arm_neon.h"
                void
                foo ()
                {
                  __asm__ volatile ("vrintn.f32 q0, q0");
                }
            } "$flags -march=armv8-a"] } {
                set et_arm_v8_neon_flags $flags
                return 1
            }
        }
    }

    return 0
}

proc check_effective_target_arm_v8_neon_ok { } {
    return [check_cached_effective_target arm_v8_neon_ok \
                check_effective_target_arm_v8_neon_ok_nocache]
}

# Return 1 if this is an ARM target supporting -mfpu=neon-vfpv4
# -mfloat-abi=softfp or equivalent options.  Some multilibs may be
# incompatible with these options.  Also set et_arm_neonv2_flags to the
# best options to add.

proc check_effective_target_arm_neonv2_ok_nocache { } {
    global et_arm_neonv2_flags
    global et_arm_neon_flags
    set et_arm_neonv2_flags ""
    if { [check_effective_target_arm32]
         && [check_effective_target_arm_neon_ok] } {
        foreach flags {"" "-mfloat-abi=softfp" "-mfpu=neon-vfpv4" "-mfpu=neon-vfpv4 -mfloat-abi=softfp"} {
            if { [check_no_compiler_messages_nocache arm_neonv2_ok object {
                #include "arm_neon.h"
                float32x2_t 
                foo (float32x2_t a, float32x2_t b, float32x2_t c)
                {
                  return vfma_f32 (a, b, c);
                }
            } "$et_arm_neon_flags $flags"] } {
                set et_arm_neonv2_flags [concat $et_arm_neon_flags $flags]
                return 1
            }
        }
    }

    return 0
}

proc check_effective_target_arm_neonv2_ok { } {
    return [check_cached_effective_target arm_neonv2_ok \
                check_effective_target_arm_neonv2_ok_nocache]
}

# Add the options needed for VFP FP16 support.  We need either
# -mfloat-abi=softfp or -mfloat-abi=hard.  If one is already specified by
# the multilib, use it.

proc add_options_for_arm_fp16 { flags } {
    if { ! [check_effective_target_arm_fp16_ok] } {
        return "$flags"
    }
    global et_arm_fp16_flags
    return "$flags $et_arm_fp16_flags"
}

# Add the options needed to enable support for IEEE format
# half-precision support.  This is valid for ARM targets.

proc add_options_for_arm_fp16_ieee { flags } {
    if { ! [check_effective_target_arm_fp16_ok] } {
        return "$flags"
    }
    global et_arm_fp16_flags
    return "$flags $et_arm_fp16_flags -mfp16-format=ieee"
}

# Add the options needed to enable support for ARM Alternative format
# half-precision support.  This is valid for ARM targets.

proc add_options_for_arm_fp16_alternative { flags } {
    if { ! [check_effective_target_arm_fp16_ok] } {
        return "$flags"
    }
    global et_arm_fp16_flags
    return "$flags $et_arm_fp16_flags -mfp16-format=alternative"
}

# Return 1 if this is an ARM target that can support a VFP fp16 variant.
# Skip multilibs that are incompatible with these options and set
# et_arm_fp16_flags to the best options to add.  This test is valid for
# ARM only.

proc check_effective_target_arm_fp16_ok_nocache { } {
    global et_arm_fp16_flags
    set et_arm_fp16_flags ""
    if { ! [check_effective_target_arm32] } {
        return 0;
    }
    if [check-flags \
            [list "" { *-*-* } { "-mfpu=*" } \
                 { "-mfpu=*fp16*" "-mfpu=*fpv[4-9]*" \
                       "-mfpu=*fpv[1-9][0-9]*" "-mfpu=*fp-armv8*" } ]] {
        # Multilib flags would override -mfpu.
        return 0
    }
    if [check-flags [list "" { *-*-* } { "-mfloat-abi=soft" } { "" } ]] {
        # Must generate floating-point instructions.
        return 0
    }
    if [check_effective_target_arm_hf_eabi] {
        # Use existing float-abi and force an fpu which supports fp16
        set et_arm_fp16_flags "-mfpu=vfpv4"
        return 1;
    }
    if [check-flags [list "" { *-*-* } { "-mfpu=*" } { "" } ]] {
        # The existing -mfpu value is OK; use it, but add softfp.
        set et_arm_fp16_flags "-mfloat-abi=softfp"
        return 1;
    }
    # Add -mfpu for a VFP fp16 variant since there is no preprocessor
    # macro to check for this support.
    set flags "-mfpu=vfpv4 -mfloat-abi=softfp"
    if { [check_no_compiler_messages_nocache arm_fp16_ok assembly {
        int dummy;
    } "$flags"] } {
        set et_arm_fp16_flags "$flags"
        return 1
    }

    return 0
}

proc check_effective_target_arm_fp16_ok { } {
    return [check_cached_effective_target arm_fp16_ok \
                check_effective_target_arm_fp16_ok_nocache]
}

# Return 1 if the target supports executing VFP FP16 instructions, 0
# otherwise.  This test is valid for ARM only.

proc check_effective_target_arm_fp16_hw { } {
    if {! [check_effective_target_arm_fp16_ok] } {
        return 0
    }
    global et_arm_fp16_flags
    check_runtime_nocache arm_fp16_hw {
        int
        main (int argc, char **argv)
        {
          __fp16 a = 1.0;
          float r;
          asm ("vcvtb.f32.f16 %0, %1"
               : "=w" (r) : "w" (a)
               : /* No clobbers.  */);
          return (r == 1.0) ? 0 : 1;
        }
    } "$et_arm_fp16_flags -mfp16-format=ieee"
}

# Creates a series of routines that return 1 if the given architecture
# can be selected and a routine to give the flags to select that architecture
# Note: Extra flags may be added to disable options from newer compilers
# (Thumb in particular - but others may be added in the future).
# Warning: Do not use check_effective_target_arm_arch_*_ok for architecture
# extension (eg. ARMv8.1-A) since there is no macro defined for them.  See
# how only __ARM_ARCH_8A__ is checked for ARMv8.1-A.
# Usage: /* { dg-require-effective-target arm_arch_v5_ok } */
#        /* { dg-add-options arm_arch_v5t } */
#        /* { dg-require-effective-target arm_arch_v5t_multilib } */
foreach { armfunc armflag armdefs } {
        v4 "-march=armv4 -marm" __ARM_ARCH_4__
        v4t "-march=armv4t" __ARM_ARCH_4T__
        v5t "-march=armv5t" __ARM_ARCH_5T__
        v5te "-march=armv5te" __ARM_ARCH_5TE__
        v6 "-march=armv6" __ARM_ARCH_6__
        v6k "-march=armv6k" __ARM_ARCH_6K__
        v6t2 "-march=armv6t2" __ARM_ARCH_6T2__
        v6z "-march=armv6z" __ARM_ARCH_6Z__
        v6m "-march=armv6-m -mthumb -mfloat-abi=soft" __ARM_ARCH_6M__
        v7a "-march=armv7-a" __ARM_ARCH_7A__
        v7r "-march=armv7-r" __ARM_ARCH_7R__
        v7m "-march=armv7-m -mthumb" __ARM_ARCH_7M__
        v7em "-march=armv7e-m -mthumb" __ARM_ARCH_7EM__
        v7ve "-march=armv7ve -marm"
                "__ARM_ARCH_7A__ && __ARM_FEATURE_IDIV"
        v8a "-march=armv8-a" __ARM_ARCH_8A__
        v8_1a "-march=armv8.1-a" __ARM_ARCH_8A__
        v8_2a "-march=armv8.2-a" __ARM_ARCH_8A__
        v8m_base "-march=armv8-m.base -mthumb -mfloat-abi=soft"
                __ARM_ARCH_8M_BASE__
        v8m_main "-march=armv8-m.main -mthumb" __ARM_ARCH_8M_MAIN__
        v8r "-march=armv8-r" __ARM_ARCH_8R__ } {
    eval [string map [list FUNC $armfunc FLAG $armflag DEFS $armdefs ] {
        proc check_effective_target_arm_arch_FUNC_ok { } {
            if { [ string match "*-marm*" "FLAG" ] &&
                ![check_effective_target_arm_arm_ok] } {
                return 0
            }
            return [check_no_compiler_messages arm_arch_FUNC_ok assembly {
                #if !(DEFS)
                #error !(DEFS)
                #endif
                int
                main (void)
                {
                    return 0;
                }
            } "FLAG" ]
        }

        proc add_options_for_arm_arch_FUNC { flags } {
            return "$flags FLAG"
        }

        proc check_effective_target_arm_arch_FUNC_multilib { } {
            return [check_runtime arm_arch_FUNC_multilib {
                int
                main (void)
                {
                    return 0;
                }
            } [add_options_for_arm_arch_FUNC ""]]
        }
    }]
}

# Return 1 if GCC was configured with --with-mode=
proc check_effective_target_default_mode { } {

    return [check_configured_with "with-mode="]
}

# Return 1 if this is an ARM target where -marm causes ARM to be
# used (not Thumb)

proc check_effective_target_arm_arm_ok { } {
    return [check_no_compiler_messages arm_arm_ok assembly {
        #if !defined (__arm__) || defined (__thumb__) || defined (__thumb2__)
        #error !__arm__ || __thumb__ || __thumb2__
        #endif
    } "-marm"]
}


# Return 1 is this is an ARM target where -mthumb causes Thumb-1 to be
# used.

proc check_effective_target_arm_thumb1_ok { } {
    return [check_no_compiler_messages arm_thumb1_ok assembly {
        #if !defined(__arm__) || !defined(__thumb__) || defined(__thumb2__)
        #error !__arm__ || !__thumb__ || __thumb2__
        #endif
        int foo (int i) { return i; }
    } "-mthumb"]
}

# Return 1 is this is an ARM target where -mthumb causes Thumb-2 to be
# used.

proc check_effective_target_arm_thumb2_ok { } {
    return [check_no_compiler_messages arm_thumb2_ok assembly {
        #if !defined(__thumb2__)
        #error !__thumb2__
        #endif
        int foo (int i) { return i; }
    } "-mthumb"]
}

# Return 1 if this is an ARM target where Thumb-1 is used without options
# added by the test.

proc check_effective_target_arm_thumb1 { } {
    return [check_no_compiler_messages arm_thumb1 assembly {
        #if !defined(__arm__) || !defined(__thumb__) || defined(__thumb2__)
        #error !__arm__ || !__thumb__ || __thumb2__
        #endif
        int i;
    } ""]
}

# Return 1 if this is an ARM target where Thumb-2 is used without options
# added by the test.

proc check_effective_target_arm_thumb2 { } {
    return [check_no_compiler_messages arm_thumb2 assembly {
        #if !defined(__thumb2__)
        #error !__thumb2__
        #endif
        int i;
    } ""]
}

# Return 1 if this is an ARM target where conditional execution is available.

proc check_effective_target_arm_cond_exec { } {
    return [check_no_compiler_messages arm_cond_exec assembly {
        #if defined(__arm__) && defined(__thumb__) && !defined(__thumb2__)
        #error FOO
        #endif
        int i;
    } ""]
}

# Return 1 if this is an ARM cortex-M profile cpu

proc check_effective_target_arm_cortex_m { } {
    if { ![istarget arm*-*-*] } {
        return 0
    }
    return [check_no_compiler_messages arm_cortex_m assembly {
        #if defined(__ARM_ARCH_ISA_ARM)
        #error __ARM_ARCH_ISA_ARM is defined
        #endif
        int i;
    } "-mthumb"]
}

# Return 1 if this is an ARM target where -mthumb causes Thumb-1 to be
# used and MOVT/MOVW instructions to be available.

proc check_effective_target_arm_thumb1_movt_ok {} {
    if [check_effective_target_arm_thumb1_ok] {
        return [check_no_compiler_messages arm_movt object {
            int
            foo (void)
            {
              asm ("movt r0, #42");
            }
        } "-mthumb"]
    } else {
        return 0
    }
}

# Return 1 if this is an ARM target where -mthumb causes Thumb-1 to be
# used and CBZ and CBNZ instructions are available.

proc check_effective_target_arm_thumb1_cbz_ok {} {
    if [check_effective_target_arm_thumb1_ok] {
        return [check_no_compiler_messages arm_movt object {
            int
            foo (void)
            {
              asm ("cbz r0, 2f\n2:");
            }
        } "-mthumb"]
    } else {
        return 0
    }
}

# Return 1 if this is an ARM target where ARMv8-M Security Extensions is
# available.

proc check_effective_target_arm_cmse_ok {} {
    return [check_no_compiler_messages arm_cmse object {
        int
        foo (void)
        {
          asm ("bxns r0");
        }
    } "-mcmse"];
}

# Return 1 if this compilation turns on string_ops_prefer_neon on.

proc check_effective_target_arm_tune_string_ops_prefer_neon { } {
    return [check_no_messages_and_pattern arm_tune_string_ops_prefer_neon "@string_ops_prefer_neon:\t1" assembly {
        int foo (void) { return 0; }
    } "-O2 -mprint-tune-info" ]
}

# Return 1 if the target supports executing NEON instructions, 0
# otherwise.  Cache the result.

proc check_effective_target_arm_neon_hw { } {
    return [check_runtime arm_neon_hw_available {
        int
        main (void)
        {
          long long a = 0, b = 1;
          asm ("vorr %P0, %P1, %P2"
               : "=w" (a)
               : "0" (a), "w" (b));
          return (a != 1);
        }
    } [add_options_for_arm_neon ""]]
}

# Return true if this is an AArch64 target that can run SVE code.

proc check_effective_target_aarch64_sve_hw { } {
    if { ![istarget aarch64*-*-*] } {
        return 0
    }
    return [check_runtime aarch64_sve_hw_available {
        int
        main (void)
        {
          asm volatile ("ptrue p0.b");
          return 0;
        }
    }]
}

# Return true if this is an AArch64 target that can run SVE code and
# if its SVE vectors have exactly BITS bits.

proc aarch64_sve_hw_bits { bits } {
    if { ![check_effective_target_aarch64_sve_hw] } {
        return 0
    }
    return [check_runtime aarch64_sve${bits}_hw [subst {
        int
        main (void)
        {
          int res;
          asm volatile ("cntd %0" : "=r" (res));
          if (res * 64 != $bits)
            __builtin_abort ();
          return 0;
        }
    }]]
}

# Return true if this is an AArch64 target that can run SVE code and
# if its SVE vectors have exactly 256 bits.

proc check_effective_target_aarch64_sve256_hw { } {
    return [aarch64_sve_hw_bits 256]
}

proc check_effective_target_arm_neonv2_hw { } {
    return [check_runtime arm_neon_hwv2_available {
        #include "arm_neon.h"
        int
        main (void)
        {
          float32x2_t a, b, c;
          asm ("vfma.f32 %P0, %P1, %P2"
               : "=w" (a)
               : "w" (b), "w" (c));
          return 0;
        }
    } [add_options_for_arm_neonv2 ""]]
}

# ID_AA64PFR1_EL1.BT using bits[3:0] == 1 implies BTI implimented.
proc check_effective_target_aarch64_bti_hw { } {
    if { ![istarget aarch64*-*-*] } {
        return 0
    }
    return [check_runtime aarch64_bti_hw_available {
        int
        main (void)
        {
          int a;
          asm volatile ("mrs %0, id_aa64pfr1_el1" : "=r" (a));
          return !((a & 0xf) == 1);
        }
    } "-O2" ]
}

# Return 1 if the target supports the ARMv8.1 Adv.SIMD extension, 0
# otherwise.  The test is valid for AArch64 and ARM.  Record the command
# line options needed.

proc check_effective_target_arm_v8_1a_neon_ok_nocache { } {
    global et_arm_v8_1a_neon_flags
    set et_arm_v8_1a_neon_flags ""

    if { ![istarget arm*-*-*] && ![istarget aarch64*-*-*] } {
        return 0;
    }

    # Iterate through sets of options to find the compiler flags that
    # need to be added to the -march option.  Start with the empty set
    # since AArch64 only needs the -march setting.
    foreach flags {"" "-mfpu=neon-fp-armv8" "-mfloat-abi=softfp" \
                       "-mfpu=neon-fp-armv8 -mfloat-abi=softfp"} {
        foreach arches { "-march=armv8-a+rdma" "-march=armv8.1-a" } {
            if { [check_no_compiler_messages_nocache arm_v8_1a_neon_ok object {
                #if !defined (__ARM_FEATURE_QRDMX)
                #error "__ARM_FEATURE_QRDMX not defined"
                #endif
            } "$flags $arches"] } {
                set et_arm_v8_1a_neon_flags "$flags $arches"
                return 1
            }
        }
    }

    return 0;
}

proc check_effective_target_arm_v8_1a_neon_ok { } {
    return [check_cached_effective_target arm_v8_1a_neon_ok \
                check_effective_target_arm_v8_1a_neon_ok_nocache]
}

# Return 1 if the target supports ARMv8.2 scalar FP16 arithmetic
# instructions, 0 otherwise.  The test is valid for ARM and for AArch64.
# Record the command line options needed.

proc check_effective_target_arm_v8_2a_fp16_scalar_ok_nocache { } {
    global et_arm_v8_2a_fp16_scalar_flags
    set et_arm_v8_2a_fp16_scalar_flags ""

    if { ![istarget arm*-*-*] && ![istarget aarch64*-*-*] } {
        return 0;
    }

    # Iterate through sets of options to find the compiler flags that
    # need to be added to the -march option.
    foreach flags {"" "-mfpu=fp-armv8" "-mfloat-abi=softfp" \
                       "-mfpu=fp-armv8 -mfloat-abi=softfp"} {
        if { [check_no_compiler_messages_nocache \
                  arm_v8_2a_fp16_scalar_ok object {
            #if !defined (__ARM_FEATURE_FP16_SCALAR_ARITHMETIC)
            #error "__ARM_FEATURE_FP16_SCALAR_ARITHMETIC not defined"
            #endif
        } "$flags -march=armv8.2-a+fp16"] } {
            set et_arm_v8_2a_fp16_scalar_flags "$flags -march=armv8.2-a+fp16"
            return 1
        }
    }

    return 0;
}

proc check_effective_target_arm_v8_2a_fp16_scalar_ok { } {
    return [check_cached_effective_target arm_v8_2a_fp16_scalar_ok \
                check_effective_target_arm_v8_2a_fp16_scalar_ok_nocache]
}

# Return 1 if the target supports ARMv8.2 Adv.SIMD FP16 arithmetic
# instructions, 0 otherwise.  The test is valid for ARM and for AArch64.
# Record the command line options needed.

proc check_effective_target_arm_v8_2a_fp16_neon_ok_nocache { } {
    global et_arm_v8_2a_fp16_neon_flags
    set et_arm_v8_2a_fp16_neon_flags ""

    if { ![istarget arm*-*-*] && ![istarget aarch64*-*-*] } {
        return 0;
    }

    # Iterate through sets of options to find the compiler flags that
    # need to be added to the -march option.
    foreach flags {"" "-mfpu=neon-fp-armv8" "-mfloat-abi=softfp" \
                       "-mfpu=neon-fp-armv8 -mfloat-abi=softfp"} {
        if { [check_no_compiler_messages_nocache \
                  arm_v8_2a_fp16_neon_ok object {
            #if !defined (__ARM_FEATURE_FP16_VECTOR_ARITHMETIC)
            #error "__ARM_FEATURE_FP16_VECTOR_ARITHMETIC not defined"
            #endif
        } "$flags -march=armv8.2-a+fp16"] } {
            set et_arm_v8_2a_fp16_neon_flags "$flags -march=armv8.2-a+fp16"
            return 1
        }
    }

    return 0;
}

proc check_effective_target_arm_v8_2a_fp16_neon_ok { } {
    return [check_cached_effective_target arm_v8_2a_fp16_neon_ok \
                check_effective_target_arm_v8_2a_fp16_neon_ok_nocache]
}

# Return 1 if the target supports ARMv8.2 Adv.SIMD Dot Product
# instructions, 0 otherwise.  The test is valid for ARM and for AArch64.
# Record the command line options needed.

proc check_effective_target_arm_v8_2a_dotprod_neon_ok_nocache { } {
    global et_arm_v8_2a_dotprod_neon_flags
    set et_arm_v8_2a_dotprod_neon_flags ""

    if { ![istarget arm*-*-*] && ![istarget aarch64*-*-*] } {
        return 0;
    }

    # Iterate through sets of options to find the compiler flags that
    # need to be added to the -march option.
    foreach flags {"" "-mfloat-abi=softfp -mfpu=neon-fp-armv8" "-mfloat-abi=hard -mfpu=neon-fp-armv8"} {
        if { [check_no_compiler_messages_nocache \
                  arm_v8_2a_dotprod_neon_ok object {
            #include <stdint.h>
            #if !defined (__ARM_FEATURE_DOTPROD)
            #error "__ARM_FEATURE_DOTPROD not defined"
            #endif
        } "$flags -march=armv8.2-a+dotprod"] } {
            set et_arm_v8_2a_dotprod_neon_flags "$flags -march=armv8.2-a+dotprod"
            return 1
        }
    }

    return 0;
}

proc check_effective_target_arm_v8_2a_dotprod_neon_ok { } {
    return [check_cached_effective_target arm_v8_2a_dotprod_neon_ok \
                check_effective_target_arm_v8_2a_dotprod_neon_ok_nocache]
}

proc add_options_for_arm_v8_2a_dotprod_neon { flags } {
    if { ! [check_effective_target_arm_v8_2a_dotprod_neon_ok] } {
        return "$flags"
    }
    global et_arm_v8_2a_dotprod_neon_flags
    return "$flags $et_arm_v8_2a_dotprod_neon_flags"
}

# Return 1 if the target supports FP16 VFMAL and VFMSL
# instructions, 0 otherwise.
# Record the command line options needed.

proc check_effective_target_arm_fp16fml_neon_ok_nocache { } {
    global et_arm_fp16fml_neon_flags
    set et_arm_fp16fml_neon_flags ""

    if { ![istarget arm*-*-*] } {
        return 0;
    }

    # Iterate through sets of options to find the compiler flags that
    # need to be added to the -march option.
    foreach flags {"" "-mfloat-abi=softfp -mfpu=neon-fp-armv8" "-mfloat-abi=hard -mfpu=neon-fp-armv8"} {
        if { [check_no_compiler_messages_nocache \
                  arm_fp16fml_neon_ok assembly {
                #include <arm_neon.h>
                float32x2_t
                foo (float32x2_t r, float16x4_t a, float16x4_t b)
                {
                  return vfmlal_high_u32 (r, a, b);
                }
        } "$flags -march=armv8.2-a+fp16fml"] } {
            set et_arm_fp16fml_neon_flags "$flags -march=armv8.2-a+fp16fml"
            return 1
        }
    }

    return 0;
}

proc check_effective_target_arm_fp16fml_neon_ok { } {
    return [check_cached_effective_target arm_fp16fml_neon_ok \
                check_effective_target_arm_fp16fml_neon_ok_nocache]
}

proc add_options_for_arm_fp16fml_neon { flags } {
    if { ! [check_effective_target_arm_fp16fml_neon_ok] } {
        return "$flags"
    }
    global et_arm_fp16fml_neon_flags
    return "$flags $et_arm_fp16fml_neon_flags"
}

# Return 1 if the target supports executing ARMv8 NEON instructions, 0
# otherwise.

proc check_effective_target_arm_v8_neon_hw { } {
    return [check_runtime arm_v8_neon_hw_available {
        #include "arm_neon.h"
        int
        main (void)
        {
          float32x2_t a = { 1.0f, 2.0f };
          #ifdef __ARM_ARCH_ISA_A64
          asm ("frinta %0.2s, %1.2s"
              : "=w" (a)
              : "w" (a));
          #else
          asm ("vrinta.f32 %P0, %P1"
               : "=w" (a)
               : "0" (a));
          #endif
          return a[0] == 2.0f;
        }
    } [add_options_for_arm_v8_neon ""]]
}

# Return 1 if the target supports executing the ARMv8.1 Adv.SIMD extension, 0
# otherwise.  The test is valid for AArch64 and ARM.

proc check_effective_target_arm_v8_1a_neon_hw { } {
    if { ![check_effective_target_arm_v8_1a_neon_ok] } {
        return 0;
    }
    return [check_runtime arm_v8_1a_neon_hw_available {
        int
        main (void)
        {
          #ifdef __ARM_ARCH_ISA_A64
          __Int32x2_t a = {0, 1};
          __Int32x2_t b = {0, 2};
          __Int32x2_t result;

          asm ("sqrdmlah %0.2s, %1.2s, %2.2s"
               : "=w"(result)
               : "w"(a), "w"(b)
               : /* No clobbers.  */);

          #else

          __simd64_int32_t a = {0, 1};
          __simd64_int32_t b = {0, 2};
          __simd64_int32_t result;

          asm ("vqrdmlah.s32 %P0, %P1, %P2"
               : "=w"(result)
               : "w"(a), "w"(b)
               : /* No clobbers.  */);
          #endif

          return result[0];
        }
    } [add_options_for_arm_v8_1a_neon ""]]
}

# Return 1 if the target supports executing floating point instructions from
# ARMv8.2 with the FP16 extension, 0 otherwise.  The test is valid for ARM and
# for AArch64.

proc check_effective_target_arm_v8_2a_fp16_scalar_hw { } {
    if { ![check_effective_target_arm_v8_2a_fp16_scalar_ok] } {
        return 0;
    }
    return [check_runtime arm_v8_2a_fp16_scalar_hw_available {
        int
        main (void)
        {
          __fp16 a = 1.0;
          __fp16 result;

          #ifdef __ARM_ARCH_ISA_A64

          asm ("fabs %h0, %h1"
               : "=w"(result)
               : "w"(a)
               : /* No clobbers.  */);

          #else

          asm ("vabs.f16 %0, %1"
               : "=w"(result)
               : "w"(a)
               : /* No clobbers.  */);

          #endif

          return (result == 1.0) ? 0 : 1;
        }
    } [add_options_for_arm_v8_2a_fp16_scalar ""]]
}

# Return 1 if the target supports executing Adv.SIMD instructions from ARMv8.2
# with the FP16 extension, 0 otherwise.  The test is valid for ARM and for
# AArch64.

proc check_effective_target_arm_v8_2a_fp16_neon_hw { } {
    if { ![check_effective_target_arm_v8_2a_fp16_neon_ok] } {
        return 0;
    }
    return [check_runtime arm_v8_2a_fp16_neon_hw_available {
        int
        main (void)
        {
          #ifdef __ARM_ARCH_ISA_A64

          __Float16x4_t a = {1.0, -1.0, 1.0, -1.0};
          __Float16x4_t result;

          asm ("fabs %0.4h, %1.4h"
               : "=w"(result)
               : "w"(a)
               : /* No clobbers.  */);

          #else

          __simd64_float16_t a = {1.0, -1.0, 1.0, -1.0};
          __simd64_float16_t result;

          asm ("vabs.f16 %P0, %P1"
               : "=w"(result)
               : "w"(a)
               : /* No clobbers.  */);

          #endif

          return (result[0] == 1.0) ? 0 : 1;
        }
    } [add_options_for_arm_v8_2a_fp16_neon ""]]
}

# Return 1 if the target supports executing AdvSIMD instructions from ARMv8.2
# with the Dot Product extension, 0 otherwise.  The test is valid for ARM and for
# AArch64.

proc check_effective_target_arm_v8_2a_dotprod_neon_hw { } {
    if { ![check_effective_target_arm_v8_2a_dotprod_neon_ok] } {
        return 0;
    }
    return [check_runtime arm_v8_2a_dotprod_neon_hw_available {
        #include "arm_neon.h"
        int
        main (void)
        {

          uint32x2_t results = {0,0};
          uint8x8_t a = {1,1,1,1,2,2,2,2};
          uint8x8_t b = {2,2,2,2,3,3,3,3};

          #ifdef __ARM_ARCH_ISA_A64
          asm ("udot %0.2s, %1.8b, %2.8b"
               : "=w"(results)
               : "w"(a), "w"(b)
               : /* No clobbers.  */);

          #else
          asm ("vudot.u8 %P0, %P1, %P2"
               : "=w"(results)
               : "w"(a), "w"(b)
               : /* No clobbers.  */);
          #endif

          return (results[0] == 8 && results[1] == 24) ? 1 : 0;
        }
    } [add_options_for_arm_v8_2a_dotprod_neon ""]]
}

# Return 1 if this is a ARM target with NEON enabled.

proc check_effective_target_arm_neon { } {
    if { [check_effective_target_arm32] } {
        return [check_no_compiler_messages arm_neon object {
            #ifndef __ARM_NEON__
            #error not NEON
            #else
            int dummy;
            #endif
        }]
    } else {
        return 0
    }
}

proc check_effective_target_arm_neonv2 { } {
    if { [check_effective_target_arm32] } {
        return [check_no_compiler_messages arm_neon object {
            #ifndef __ARM_NEON__
            #error not NEON
            #else
            #ifndef __ARM_FEATURE_FMA
            #error not NEONv2
            #else
            int dummy;
            #endif
            #endif
        }]
    } else {
        return 0
    }
}

# Return 1 if this is an ARM target with load acquire and store release
# instructions for 8-, 16- and 32-bit types.

proc check_effective_target_arm_acq_rel { } {
    return [check_no_compiler_messages arm_acq_rel object {
        void
        load_acquire_store_release (void)
        {
          asm ("lda r0, [r1]\n\t"
               "stl r0, [r1]\n\t"
               "ldah r0, [r1]\n\t"
               "stlh r0, [r1]\n\t"
               "ldab r0, [r1]\n\t"
               "stlb r0, [r1]"
               : : : "r0", "memory");
        }
    }]
}

# Add the options needed for MIPS Paired-Single.

proc add_options_for_mpaired_single { flags } {
    if { ! [check_effective_target_mpaired_single] } {
        return "$flags"
    }
    return "$flags -mpaired-single"
}

# Add the options needed for MIPS SIMD Architecture.

proc add_options_for_mips_msa { flags } {
  if { ! [check_effective_target_mips_msa] } {
    return "$flags"
  }
  return "$flags -mmsa"
}

# Add the options needed for MIPS Loongson MMI Architecture.

proc add_options_for_mips_loongson_mmi { flags } {
  if { ! [check_effective_target_mips_loongson_mmi] } {
    return "$flags"
  }
  return "$flags -mloongson-mmi"
}


# Return 1 if this a Loongson-2E or -2F target using an ABI that supports
# the Loongson vector modes.

proc check_effective_target_mips_loongson_mmi { } {
    return [check_no_compiler_messages loongson assembly {
        #if !defined(__mips_loongson_mmi)
        #error !__mips_loongson_mmi
        #endif
        #if !defined(__mips_loongson_vector_rev)
        #error !__mips_loongson_vector_rev
        #endif
    }]
}

# Return 1 if this is a MIPS target that supports the legacy NAN.

proc check_effective_target_mips_nanlegacy { } {
    return [check_no_compiler_messages nanlegacy assembly {
        #include <stdlib.h>
        int main () { return 0; }
    } "-mnan=legacy"]
}

# Return 1 if an MSA program can be compiled to object

proc check_effective_target_mips_msa { } {
  if ![check_effective_target_nomips16] {
    return 0
  }
  return [check_no_compiler_messages msa object {
    #if !defined(__mips_msa)
    #error "MSA NOT AVAIL"
    #else
    #if !(((__mips == 64) || (__mips == 32)) && (__mips_isa_rev >= 2))
    #error "MSA NOT AVAIL FOR ISA REV < 2"
    #endif
    #if !defined(__mips_hard_float)
    #error "MSA HARD_FLOAT REQUIRED"
    #endif
    #if __mips_fpr != 64
    #error "MSA 64-bit FPR REQUIRED"
    #endif
    #include <msa.h>

    int main()
    {
      v8i16 v = __builtin_msa_ldi_h (1);

      return v[0];
    }
    #endif
  } "-mmsa" ]
}

# Return 1 if this is an ARM target that adheres to the ABI for the ARM
# Architecture.

proc check_effective_target_arm_eabi { } {
    return [check_no_compiler_messages arm_eabi object {
        #ifndef __ARM_EABI__
        #error not EABI
        #else
        int dummy;
        #endif
    }]
}

# Return 1 if this is an ARM target that adheres to the hard-float variant of
# the ABI for the ARM Architecture (e.g. -mfloat-abi=hard).

proc check_effective_target_arm_hf_eabi { } {
    return [check_no_compiler_messages arm_hf_eabi object {
        #if !defined(__ARM_EABI__) || !defined(__ARM_PCS_VFP)
        #error not hard-float EABI
        #else
        int dummy;
        #endif
    }]
}

# Return 1 if this is an ARM target that uses the soft float ABI
# with no floating-point instructions at all (e.g. -mfloat-abi=soft).

proc check_effective_target_arm_softfloat { } {
    return [check_no_compiler_messages arm_softfloat object {
        #if !defined(__SOFTFP__)
        #error not soft-float EABI
        #else
        int dummy;
        #endif
    }]
}

# Return 1 if this is an ARM target supporting -mcpu=iwmmxt.
# Some multilibs may be incompatible with this option.

proc check_effective_target_arm_iwmmxt_ok { } {
    if { [check_effective_target_arm32] } {
        return [check_no_compiler_messages arm_iwmmxt_ok object {
            int dummy;
        } "-mcpu=iwmmxt"]
    } else {
        return 0
    }
}

# Return true if LDRD/STRD instructions are prefered over LDM/STM instructions
# for an ARM target.
proc check_effective_target_arm_prefer_ldrd_strd { } {
    if { ![check_effective_target_arm32] } {
      return 0;
    }

    return [check_no_messages_and_pattern arm_prefer_ldrd_strd "strd\tr" assembly {
        void foo (void) { __asm__ ("" ::: "r4", "r5"); }
    }  "-O2 -mthumb" ]
}

# Return 1 if this is a PowerPC target supporting -meabi.

proc check_effective_target_powerpc_eabi_ok { } {
    if { [istarget powerpc*-*-*] } {
        return [check_no_compiler_messages powerpc_eabi_ok object {
            int dummy;
        } "-meabi"]
    } else {
        return 0
    }
}

# Return 1 if this is a PowerPC target with floating-point registers.

proc check_effective_target_powerpc_fprs { } {
    if { [istarget powerpc*-*-*]
         || [istarget rs6000-*-*] } {
        return [check_no_compiler_messages powerpc_fprs object {
            #ifdef __NO_FPRS__
            #error no FPRs
            #else
            int dummy;
            #endif
        }]
    } else {
        return 0
    }
}

# Return 1 if this is a PowerPC target with hardware double-precision
# floating point.

proc check_effective_target_powerpc_hard_double { } {
    if { [istarget powerpc*-*-*]
         || [istarget rs6000-*-*] } {
        return [check_no_compiler_messages powerpc_hard_double object {
            #ifdef _SOFT_DOUBLE
            #error soft double
            #else
            int dummy;
            #endif
        }]
    } else {
        return 0
    }
}

# Return 1 if this is a PowerPC target supporting -maltivec.

proc check_effective_target_powerpc_altivec_ok { } {
    if { ([istarget powerpc*-*-*]
         && ![istarget powerpc-*-linux*paired*])
         || [istarget rs6000-*-*] } {
        # AltiVec is not supported on AIX before 5.3.
        if { [istarget powerpc*-*-aix4*]
             || [istarget powerpc*-*-aix5.1*] 
             || [istarget powerpc*-*-aix5.2*] } {
            return 0
        }
        return [check_no_compiler_messages powerpc_altivec_ok object {
            int dummy;
        } "-maltivec"]
    } else {
        return 0
    }
}

# Return 1 if this is a PowerPC target supporting -mpower8-vector

proc check_effective_target_powerpc_p8vector_ok { } {
    if { ([istarget powerpc*-*-*]
         && ![istarget powerpc-*-linux*paired*])
         || [istarget rs6000-*-*] } {
        # AltiVec is not supported on AIX before 5.3.
        if { [istarget powerpc*-*-aix4*]
             || [istarget powerpc*-*-aix5.1*] 
             || [istarget powerpc*-*-aix5.2*] } {
            return 0
        }
        return [check_no_compiler_messages powerpc_p8vector_ok object {
            int main (void) {
#ifdef __MACH__
                asm volatile ("xxlorc vs0,vs0,vs0");
#else
                asm volatile ("xxlorc 0,0,0");
#endif
                return 0;
            }
        } "-mpower8-vector"]
    } else {
        return 0
    }
}

# Return 1 if this is a PowerPC target supporting -mpower9-vector

proc check_effective_target_powerpc_p9vector_ok { } {
    if { ([istarget powerpc*-*-*]
         && ![istarget powerpc-*-linux*paired*])
         || [istarget rs6000-*-*] } {
        # AltiVec is not supported on AIX before 5.3.
        if { [istarget powerpc*-*-aix4*]
             || [istarget powerpc*-*-aix5.1*] 
             || [istarget powerpc*-*-aix5.2*] } {
            return 0
        }
        return [check_no_compiler_messages powerpc_p9vector_ok object {
            int main (void) {
                long e = -1;
                vector double v = (vector double) { 0.0, 0.0 };
                asm ("xsxexpdp %0,%1" : "+r" (e) : "wa" (v));
                return e;
            }
        } "-mpower9-vector"]
    } else {
        return 0
    }
}

# Return 1 if this is a PowerPC target supporting -mmodulo

proc check_effective_target_powerpc_p9modulo_ok { } {
    if { ([istarget powerpc*-*-*]
         && ![istarget powerpc-*-linux*paired*])
         || [istarget rs6000-*-*] } {
        # AltiVec is not supported on AIX before 5.3.
        if { [istarget powerpc*-*-aix4*]
             || [istarget powerpc*-*-aix5.1*] 
             || [istarget powerpc*-*-aix5.2*] } {
            return 0
        }
        return [check_no_compiler_messages powerpc_p9modulo_ok object {
            int main (void) {
                int i = 5, j = 3, r = -1;
                asm ("modsw %0,%1,%2" : "+r" (r) : "r" (i), "r" (j));
                return (r == 2);
            }
        } "-mmodulo"]
    } else {
        return 0
    }
}

# Return 1 if this is a PowerPC target supporting -mfloat128 via either
# software emulation on power7/power8 systems or hardware support on power9.

proc check_effective_target_powerpc_float128_sw_ok { } {
    if { ([istarget powerpc*-*-*]
         && ![istarget powerpc-*-linux*paired*])
         || [istarget rs6000-*-*] } {
        # AltiVec is not supported on AIX before 5.3.
        if { [istarget powerpc*-*-aix4*]
             || [istarget powerpc*-*-aix5.1*] 
             || [istarget powerpc*-*-aix5.2*] } {
            return 0
        }
        return [check_no_compiler_messages powerpc_float128_sw_ok object {
                volatile __float128 x = 1.0q;
                volatile __float128 y = 2.0q;
                int main() {
                    __float128 z = x + y;
                    return (z == 3.0q);
                }
            } "-mfloat128 -mvsx"]
    } else {
        return 0
    }
}

# Return 1 if this is a PowerPC target supporting -mfloat128 via hardware
# support on power9.

proc check_effective_target_powerpc_float128_hw_ok { } {
    if { ([istarget powerpc*-*-*]
         && ![istarget powerpc-*-linux*paired*])
         || [istarget rs6000-*-*] } {
        # AltiVec is not supported on AIX before 5.3.
        if { [istarget powerpc*-*-aix4*]
             || [istarget powerpc*-*-aix5.1*] 
             || [istarget powerpc*-*-aix5.2*] } {
            return 0
        }
        return [check_no_compiler_messages powerpc_float128_hw_ok object {
                volatile __float128 x = 1.0q;
                volatile __float128 y = 2.0q;
                int main() {
                    __float128 z;
                    __asm__ ("xsaddqp %0,%1,%2" : "=v" (z) : "v" (x), "v" (y));
                    return (z == 3.0q);
                }
        } "-mfloat128-hardware"]
    } else {
        return 0
    }
}

# Return 1 if current options define float128, 0 otherwise.

proc check_effective_target_ppc_float128 { } {
    return [check_no_compiler_messages_nocache ppc_float128 object {
        #ifndef __FLOAT128__
          nope no good
        #endif
    }]
}

# Return 1 if current options generate float128 insns, 0 otherwise.

proc check_effective_target_ppc_float128_insns { } {
    return [check_no_compiler_messages_nocache ppc_float128 object {
        #ifndef __FLOAT128_HARDWARE__
          nope no good
        #endif
    }]
}

# Return 1 if current options generate VSX instructions, 0 otherwise.

proc check_effective_target_powerpc_vsx { } {
    return [check_no_compiler_messages_nocache powerpc_vsx object {
        #ifndef __VSX__
          nope no vsx
        #endif
    }]
}

# Return 1 if this is a PowerPC target supporting -mvsx

proc check_effective_target_powerpc_vsx_ok { } {
    if { ([istarget powerpc*-*-*]
         && ![istarget powerpc-*-linux*paired*])
         || [istarget rs6000-*-*] } {
        # VSX is not supported on AIX before 7.1.
        if { [istarget powerpc*-*-aix4*]
             || [istarget powerpc*-*-aix5*]
             || [istarget powerpc*-*-aix6*] } {
            return 0
        }
        return [check_no_compiler_messages powerpc_vsx_ok object {
            int main (void) {
#ifdef __MACH__
                asm volatile ("xxlor vs0,vs0,vs0");
#else
                asm volatile ("xxlor 0,0,0");
#endif
                return 0;
            }
        } "-mvsx"]
    } else {
        return 0
    }
}

# Return 1 if this is a PowerPC target supporting -mhtm

proc check_effective_target_powerpc_htm_ok { } {
    if { ([istarget powerpc*-*-*]
         && ![istarget powerpc-*-linux*paired*])
         || [istarget rs6000-*-*] } {
        # HTM is not supported on AIX yet.
        if { [istarget powerpc*-*-aix*] } {
            return 0
        }
        return [check_no_compiler_messages powerpc_htm_ok object {
            int main (void) {
                asm volatile ("tbegin. 0");
                return 0;
            }
        } "-mhtm"]
    } else {
        return 0
    }
}

# Return 1 if the target supports executing HTM hardware instructions,
# 0 otherwise.  Cache the result.

proc check_htm_hw_available { } {
    return [check_cached_effective_target htm_hw_available {
        # For now, disable on Darwin
        if { [istarget powerpc-*-eabi] || [istarget powerpc*-*-eabispe] || [istarget *-*-darwin*]} {
            expr 0
        } else {
            check_runtime_nocache htm_hw_available {
                int main()
                {
                  __builtin_ttest ();
                  return 0;
                }
            } "-mhtm"
        }
    }]
}
# Return 1 if this is a PowerPC target supporting -mcpu=cell.

proc check_effective_target_powerpc_ppu_ok { } {
    if [check_effective_target_powerpc_altivec_ok] {
        return [check_no_compiler_messages cell_asm_available object {
            int main (void) {
#ifdef __MACH__
                asm volatile ("lvlx v0,v0,v0");
#else
                asm volatile ("lvlx 0,0,0");
#endif
                return 0;
            }
        }]
    } else {
        return 0
    }
}

# Return 1 if this is a PowerPC target that supports SPU.

proc check_effective_target_powerpc_spu { } {
    if { [istarget powerpc*-*-linux*] } {
        return [check_effective_target_powerpc_altivec_ok]
    } else {
        return 0
    }
}

# Return 1 if this is a PowerPC SPE target.  The check includes options
# specified by dg-options for this test, so don't cache the result.

proc check_effective_target_powerpc_spe_nocache { } {
    if { [istarget powerpc*-*-*] } {
        return [check_no_compiler_messages_nocache powerpc_spe object {
            #ifndef __SPE__
            #error not SPE
            #else
            int dummy;
            #endif
        } [current_compiler_flags]]
    } else {
        return 0
    }
}

# Return 1 if this is a PowerPC target with SPE enabled.

proc check_effective_target_powerpc_spe { } {
    if { [istarget powerpc*-*-*] } {
        return [check_no_compiler_messages powerpc_spe object {
            #ifndef __SPE__
            #error not SPE
            #else
            int dummy;
            #endif
        }]
    } else {
        return 0
    }
}

# Return 1 if this is a PowerPC target with Altivec enabled.

proc check_effective_target_powerpc_altivec { } {
    if { [istarget powerpc*-*-*] } {
        return [check_no_compiler_messages powerpc_altivec object {
            #ifndef __ALTIVEC__
            #error not Altivec
            #else
            int dummy;
            #endif
        }]
    } else {
        return 0
    }
}

# Return 1 if this is a PowerPC 405 target.  The check includes options
# specified by dg-options for this test, so don't cache the result.

proc check_effective_target_powerpc_405_nocache { } {
    if { [istarget powerpc*-*-*] || [istarget rs6000-*-*] } {
        return [check_no_compiler_messages_nocache powerpc_405 object {
            #ifdef __PPC405__
            int dummy;
            #else
            #error not a PPC405
            #endif
        } [current_compiler_flags]]
    } else {
        return 0
    }
}

# Return 1 if this is a PowerPC target using the ELFv2 ABI.

proc check_effective_target_powerpc_elfv2 { } {
    if { [istarget powerpc*-*-*] } {
        return [check_no_compiler_messages powerpc_elfv2 object {
            #if _CALL_ELF != 2
            #error not ELF v2 ABI
            #else
            int dummy;
            #endif
        }]
    } else {
        return 0
    }
}

# Return 1 if this is a SPU target with a toolchain that
# supports automatic overlay generation.

proc check_effective_target_spu_auto_overlay { } {
    if { [istarget spu*-*-elf*] } {
        return [check_no_compiler_messages spu_auto_overlay executable {
                int main (void) { }
                } "-Wl,--auto-overlay" ]
    } else {
        return 0
    }
}

# The VxWorks SPARC simulator accepts only EM_SPARC executables and
# chokes on EM_SPARC32PLUS or EM_SPARCV9 executables.  Return 1 if the
# test environment appears to run executables on such a simulator.

proc check_effective_target_ultrasparc_hw { } {
    return [check_runtime ultrasparc_hw {
        int main() { return 0; }
    } "-mcpu=ultrasparc"]
}

# Return 1 if the test environment supports executing UltraSPARC VIS2
# instructions.  We check this by attempting: "bmask %g0, %g0, %g0"

proc check_effective_target_ultrasparc_vis2_hw { } {
    return [check_runtime ultrasparc_vis2_hw {
        int main() { __asm__(".word 0x81b00320"); return 0; }
    } "-mcpu=ultrasparc3"]
}

# Return 1 if the test environment supports executing UltraSPARC VIS3
# instructions.  We check this by attempting: "addxc %g0, %g0, %g0"

proc check_effective_target_ultrasparc_vis3_hw { } {
    return [check_runtime ultrasparc_vis3_hw {
        int main() { __asm__(".word 0x81b00220"); return 0; }
    } "-mcpu=niagara3"]
}

# Return 1 if this is a SPARC-V9 target.

proc check_effective_target_sparc_v9 { } {
    if { [istarget sparc*-*-*] } {
        return [check_no_compiler_messages sparc_v9 object {
            int main (void) {
                asm volatile ("return %i7+8");
                return 0;
            }
        }]
    } else {
        return 0
    }
}

# Return 1 if this is a SPARC target with VIS enabled.

proc check_effective_target_sparc_vis { } {
    if { [istarget sparc*-*-*] } {
        return [check_no_compiler_messages sparc_vis object {
            #ifndef __VIS__
            #error not VIS
            #else
            int dummy;
            #endif
        }]
    } else {
        return 0
    }
}

# Return 1 if the target supports hardware vector shift operation.

proc check_effective_target_vect_shift { } {
    return [check_cached_effective_target_indexed vect_shift {
      expr {([istarget powerpc*-*-*]
              && ![istarget powerpc-*-linux*paired*])
             || [istarget ia64-*-*]
             || [istarget i?86-*-*] || [istarget x86_64-*-*]
             || [istarget aarch64*-*-*]
             || [is-effective-target arm_neon]
             || ([istarget mips*-*-*]
                 && ([et-is-effective-target mips_msa]
                     || [et-is-effective-target mips_loongson_mmi]))
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

# Return 1 if the target supports hardware vector shift by register operation.

proc check_effective_target_vect_var_shift { } {
    return [check_cached_effective_target_indexed vect_var_shift {
      expr {(([istarget i?86-*-*] || [istarget x86_64-*-*])
             && [check_avx2_available])
      }}]
}

proc check_effective_target_whole_vector_shift { } {
    if { [istarget i?86-*-*] || [istarget x86_64-*-*]
         || [istarget ia64-*-*]
         || [istarget aarch64*-*-*]
         || [istarget powerpc64*-*-*]
         || ([is-effective-target arm_neon]
             && [check_effective_target_arm_little_endian])
         || ([istarget mips*-*-*]
             && [et-is-effective-target mips_loongson_mmi])
         || ([istarget s390*-*-*]
             && [check_effective_target_s390_vx]) } {
        set answer 1
    } else {
        set answer 0
    }

    verbose "check_effective_target_vect_long: returning $answer" 2
    return $answer
}

# Return 1 if the target supports vector bswap operations.

proc check_effective_target_vect_bswap { } {
    return [check_cached_effective_target_indexed vect_bswap {
      expr { [istarget aarch64*-*-*] || [is-effective-target arm_neon] }}]
}

# Return 1 if the target supports hardware vector shift operation for char.

proc check_effective_target_vect_shift_char { } {
    return [check_cached_effective_target_indexed vect_shift_char {
      expr { ([istarget powerpc*-*-*]
             && ![istarget powerpc-*-linux*paired*])
             || [is-effective-target arm_neon]
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa])
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

# Return 1 if the target supports hardware vectors of long, 0 otherwise.
#
# This can change for different subtargets so do not cache the result.

proc check_effective_target_vect_long { } {
    if { [istarget i?86-*-*] || [istarget x86_64-*-*]
         || (([istarget powerpc*-*-*]
              && ![istarget powerpc-*-linux*paired*])
              && [check_effective_target_ilp32])
         || [is-effective-target arm_neon]
         || ([istarget sparc*-*-*] && [check_effective_target_ilp32])
         || [istarget aarch64*-*-*]
         || ([istarget mips*-*-*]
              && [et-is-effective-target mips_msa])
         || ([istarget s390*-*-*]
             && [check_effective_target_s390_vx]) } {
        set answer 1
    } else {
        set answer 0
    }

    verbose "check_effective_target_vect_long: returning $answer" 2
    return $answer
}

# Return 1 if the target supports hardware vectors of float when
# -funsafe-math-optimizations is enabled, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_float { } {
    return [check_cached_effective_target_indexed vect_float {
      expr { [istarget i?86-*-*] || [istarget x86_64-*-*]
             || [istarget powerpc*-*-*]
             || [istarget spu-*-*]
             || [istarget mips-sde-elf]
             || [istarget mipsisa64*-*-*]
             || [istarget ia64-*-*]
             || [istarget aarch64*-*-*]
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa])
             || [is-effective-target arm_neon]
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vxe]) }}]
}

# Return 1 if the target supports hardware vectors of float without
# -funsafe-math-optimizations being enabled, 0 otherwise.

proc check_effective_target_vect_float_strict { } {
    return [expr { [check_effective_target_vect_float]
                   && ![istarget arm*-*-*] }]
}

# Return 1 if the target supports hardware vectors of double, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_double { } {
    return [check_cached_effective_target_indexed vect_double {
        expr { (([istarget i?86-*-*] || [istarget x86_64-*-*])
                 && [check_no_compiler_messages vect_double assembly {
                  #ifdef __tune_atom__
                  # error No double vectorizer support.
                  #endif
                }])
             || [istarget aarch64*-*-*]
             || [istarget spu-*-*]
             || ([istarget powerpc*-*-*] && [check_vsx_hw_available])
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa])
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx])} }]
}

# Return 1 if the target supports conditional addition, subtraction,
# multiplication, division, minimum and maximum on vectors of double,
# via the cond_ optabs.  Return 0 otherwise.

proc check_effective_target_vect_double_cond_arith { } {
    return [check_effective_target_aarch64_sve]
}

# Return 1 if the target supports hardware vectors of long long, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_long_long { } {
    return [check_cached_effective_target_indexed vect_long_long {
      expr { [istarget i?86-*-*] || [istarget x86_64-*-*]
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa])
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}


# Return 1 if the target plus current options does not support a vector
# max instruction on "int", 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_no_int_min_max { } {
    return [check_cached_effective_target_indexed vect_no_int_min_max {
      expr { [istarget sparc*-*-*]
             || [istarget spu-*-*]
             || [istarget alpha*-*-*]
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_loongson_mmi]) }}]
}

# Return 1 if the target plus current options does not support a vector
# add instruction on "int", 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_no_int_add { } {
    # Alpha only supports vector add on V8QI and V4HI.
    return [check_cached_effective_target_indexed vect_no_int_add {
      expr { [istarget alpha*-*-*] }}]
}

# Return 1 if the target plus current options does not support vector
# bitwise instructions, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_no_bitwise { } {
    return [check_cached_effective_target_indexed vect_no_bitwise { return 0 }]
}

# Return 1 if the target plus current options supports vector permutation,
# 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_perm { } {
    return [check_cached_effective_target_indexed vect_perm {
      expr { [is-effective-target arm_neon]
             || [istarget aarch64*-*-*]
             || [istarget powerpc*-*-*]
             || [istarget spu-*-*]
             || [istarget i?86-*-*] || [istarget x86_64-*-*]
             || ([istarget mips*-*-*]
                 && ([et-is-effective-target mpaired_single]
                     || [et-is-effective-target mips_msa]))
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

# Return 1 if, for some VF:
#
# - the target's default vector size is VF * ELEMENT_BITS bits
#
# - it is possible to implement the equivalent of:
#
#      int<ELEMENT_BITS>_t s1[COUNT][COUNT * VF], s2[COUNT * VF];
#      for (int i = 0; i < COUNT; ++i)
#        for (int j = 0; j < COUNT * VF; ++j)
#          s1[i][j] = s2[j - j % COUNT + i]
#
#   using only a single 2-vector permute for each vector in s1.
#
# E.g. for COUNT == 3 and vector length 4, the two arrays would be:
#
#    s2    | a0 a1 a2 a3 | b0 b1 b2 b3 | c0 c1 c2 c3
#    ------+-------------+-------------+------------
#    s1[0] | a0 a0 a0 a3 | a3 a3 b2 b2 | b2 c1 c1 c1
#    s1[1] | a1 a1 a1 b0 | b0 b0 b3 b3 | b3 c2 c2 c2
#    s1[2] | a2 a2 a2 b1 | b1 b1 c0 c0 | c0 c3 c3 c3
#
# Each s1 permute requires only two of a, b and c.
#
# The distance between the start of vector n in s1[0] and the start
# of vector n in s2 is:
#
#    A = (n * VF) % COUNT
#
# The corresponding value for the end of vector n is:
#
#    B = (n * VF + VF - 1) % COUNT
#
# Subtracting i from each value gives the corresponding difference
# for s1[i].  The condition being tested by this function is false
# iff A - i > 0 and B - i < 0 for some i and n, such that the first
# element for s1[i] comes from vector n - 1 of s2 and the last element
# comes from vector n + 1 of s2.  The condition is therefore true iff
# A <= B for all n.  This is turn means the condition is true iff:
#
#    (n * VF) % COUNT + (VF - 1) % COUNT < COUNT
#
# for all n.  COUNT - (n * VF) % COUNT is bounded by gcd (VF, COUNT),
# and will be that value for at least one n in [0, COUNT), so we want:
#
#    (VF - 1) % COUNT < gcd (VF, COUNT)

proc vect_perm_supported { count element_bits } {
    set vector_bits [lindex [available_vector_sizes] 0]
    # The number of vectors has to be a power of 2 when permuting
    # variable-length vectors.
    if { $vector_bits <= 0 && ($count & -$count) != $count } {
        return 0
    }
    set vf [expr { $vector_bits / $element_bits }]

    # Compute gcd (VF, COUNT).
    set gcd $vf
    set temp1 $count
    while { $temp1 > 0 } {
        set temp2 [expr { $gcd % $temp1 }]
        set gcd $temp1
        set temp1 $temp2
    }
    return [expr { ($vf - 1) % $count < $gcd }]
}

# Return 1 if the target supports SLP permutation of 3 vectors when each
# element has 32 bits.

proc check_effective_target_vect_perm3_int { } {
    return [expr { [check_effective_target_vect_perm]
                   && [vect_perm_supported 3 32] }]
}

# Return 1 if the target plus current options supports vector permutation
# on byte-sized elements, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_perm_byte { } {
    return [check_cached_effective_target_indexed vect_perm_byte {
      expr { ([is-effective-target arm_neon]
              && [is-effective-target arm_little_endian])
             || ([istarget aarch64*-*-*]
                 && [is-effective-target aarch64_little_endian])
             || [istarget powerpc*-*-*]
             || [istarget spu-*-*]
             || ([istarget mips-*.*]
                 && [et-is-effective-target mips_msa])
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

# Return 1 if the target supports SLP permutation of 3 vectors when each
# element has 8 bits.

proc check_effective_target_vect_perm3_byte { } {
    return [expr { [check_effective_target_vect_perm_byte]
                   && [vect_perm_supported 3 8] }]
}

# Return 1 if the target plus current options supports vector permutation
# on short-sized elements, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_perm_short { } {
    return [check_cached_effective_target_indexed vect_perm_short {
      expr { ([is-effective-target arm_neon]
              && [is-effective-target arm_little_endian])
             || ([istarget aarch64*-*-*]
                 && [is-effective-target aarch64_little_endian])
             || [istarget powerpc*-*-*]
             || [istarget spu-*-*]
             || (([istarget i?86-*-*] || [istarget x86_64-*-*])
                 && [check_ssse3_available])
             || ([istarget mips*-*-*]
                  && [et-is-effective-target mips_msa])
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

# Return 1 if the target supports SLP permutation of 3 vectors when each
# element has 16 bits.

proc check_effective_target_vect_perm3_short { } {
    return [expr { [check_effective_target_vect_perm_short]
                   && [vect_perm_supported 3 16] }]
}

# Return 1 if the target plus current options supports folding of
# copysign into XORSIGN.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_xorsign { } {
    return [check_cached_effective_target_indexed xorsign {
      expr { [istarget aarch64*-*-*] || [istarget arm*-*-*] }}]
}

# Return 1 if the target plus current options supports a vector
# widening summation of *short* args into *int* result, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_widen_sum_hi_to_si_pattern { } {
    return [check_cached_effective_target_indexed vect_widen_sum_hi_to_si_pattern {
      expr { [istarget powerpc*-*-*]
             || ([istarget aarch64*-*-*]
                 && ![check_effective_target_aarch64_sve])
             || [is-effective-target arm_neon]
             || [istarget ia64-*-*] }}]
}

# Return 1 if the target plus current options supports a vector
# widening summation of *short* args into *int* result, 0 otherwise.
# A target can also support this widening summation if it can support
# promotion (unpacking) from shorts to ints.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_widen_sum_hi_to_si { } {
    return [check_cached_effective_target_indexed vect_widen_sum_hi_to_si {
      expr { [check_effective_target_vect_unpack]
             || [istarget powerpc*-*-*]
             || [istarget ia64-*-*] }}]
}

# Return 1 if the target plus current options supports a vector
# widening summation of *char* args into *short* result, 0 otherwise.
# A target can also support this widening summation if it can support
# promotion (unpacking) from chars to shorts.
#
# This won't change for different subtargets so cache the result.
                                                                                                
proc check_effective_target_vect_widen_sum_qi_to_hi { } {
    return [check_cached_effective_target_indexed vect_widen_sum_qi_to_hi {
      expr { [check_effective_target_vect_unpack]
             || [is-effective-target arm_neon]
             || [istarget ia64-*-*] }}]
}

# Return 1 if the target plus current options supports a vector
# widening summation of *char* args into *int* result, 0 otherwise.
#
# This won't change for different subtargets so cache the result.
                                                                                                
proc check_effective_target_vect_widen_sum_qi_to_si { } {
    return [check_cached_effective_target_indexed vect_widen_sum_qi_to_si {
      expr { [istarget powerpc*-*-*] }}]
}

# Return 1 if the target plus current options supports a vector
# widening multiplication of *char* args into *short* result, 0 otherwise.
# A target can also support this widening multplication if it can support
# promotion (unpacking) from chars to shorts, and vect_short_mult (non-widening
# multiplication of shorts).
#
# This won't change for different subtargets so cache the result.


proc check_effective_target_vect_widen_mult_qi_to_hi { } {
    return [check_cached_effective_target_indexed vect_widen_mult_qi_to_hi {
      expr { ([check_effective_target_vect_unpack]
               && [check_effective_target_vect_short_mult])
              || ([istarget powerpc*-*-*]
                  || ([istarget aarch64*-*-*]
                      && ![check_effective_target_aarch64_sve])
                  || [is-effective-target arm_neon]
                  || ([istarget s390*-*-*]
                      && [check_effective_target_s390_vx])) }}]
}

# Return 1 if the target plus current options supports a vector
# widening multiplication of *short* args into *int* result, 0 otherwise.
# A target can also support this widening multplication if it can support
# promotion (unpacking) from shorts to ints, and vect_int_mult (non-widening
# multiplication of ints).
#
# This won't change for different subtargets so cache the result.


proc check_effective_target_vect_widen_mult_hi_to_si { } {
    return [check_cached_effective_target_indexed vect_widen_mult_hi_to_si {
      expr { ([check_effective_target_vect_unpack]
              && [check_effective_target_vect_int_mult])
             || ([istarget powerpc*-*-*]
                 || [istarget spu-*-*]
                 || [istarget ia64-*-*]
                 || ([istarget aarch64*-*-*]
                     && ![check_effective_target_aarch64_sve])
                 || [istarget i?86-*-*] || [istarget x86_64-*-*]
                 || [is-effective-target arm_neon]
                 || ([istarget s390*-*-*]
                     && [check_effective_target_s390_vx])) }}]
}

# Return 1 if the target plus current options supports a vector
# widening multiplication of *char* args into *short* result, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_widen_mult_qi_to_hi_pattern { } {
    return [check_cached_effective_target_indexed vect_widen_mult_qi_to_hi_pattern {
      expr { [istarget powerpc*-*-*]
             || ([is-effective-target arm_neon]
                 && [check_effective_target_arm_little_endian])
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

# Return 1 if the target plus current options supports a vector
# widening multiplication of *short* args into *int* result, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_widen_mult_hi_to_si_pattern { } {
    return [check_cached_effective_target_indexed vect_widen_mult_hi_to_si_pattern {
      expr { [istarget powerpc*-*-*]
             || [istarget spu-*-*]
             || [istarget ia64-*-*]
             || [istarget i?86-*-*] || [istarget x86_64-*-*]
             || ([is-effective-target arm_neon]
                 && [check_effective_target_arm_little_endian])
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

# Return 1 if the target plus current options supports a vector
# widening multiplication of *int* args into *long* result, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_widen_mult_si_to_di_pattern { } {
    return [check_cached_effective_target_indexed vect_widen_mult_si_to_di_pattern {
      expr { [istarget ia64-*-*]
             || [istarget i?86-*-*] || [istarget x86_64-*-*]
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

# Return 1 if the target plus current options supports a vector
# widening shift, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_widen_shift { } {
    return [check_cached_effective_target_indexed vect_widen_shift {
      expr { [is-effective-target arm_neon] }}]
}

# Return 1 if the target plus current options supports a vector
# dot-product of signed chars, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_sdot_qi { } {
    return [check_cached_effective_target_indexed vect_sdot_qi {
      expr { [istarget ia64-*-*]
             || [istarget aarch64*-*-*]
             || [istarget arm*-*-*]
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa]) }}]
}

# Return 1 if the target plus current options supports a vector
# dot-product of unsigned chars, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_udot_qi { } {
    return [check_cached_effective_target_indexed vect_udot_qi {
      expr { [istarget powerpc*-*-*]
             || [istarget aarch64*-*-*]
             || [istarget arm*-*-*]
             || [istarget ia64-*-*]
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa]) }}]
}

# Return 1 if the target plus current options supports a vector
# dot-product of signed shorts, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_sdot_hi { } {
    return [check_cached_effective_target_indexed vect_sdot_hi {
      expr { ([istarget powerpc*-*-*] && ![istarget powerpc-*-linux*paired*])
             || [istarget ia64-*-*]
             || [istarget i?86-*-*] || [istarget x86_64-*-*]
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa]) }}]
}

# Return 1 if the target plus current options supports a vector
# dot-product of unsigned shorts, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_udot_hi { } {
    return [check_cached_effective_target_indexed vect_udot_hi {
      expr { ([istarget powerpc*-*-*] && ![istarget powerpc-*-linux*paired*])
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa]) }}]
}

# Return 1 if the target plus current options supports a vector
# sad operation of unsigned chars, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_usad_char { } {
    return [check_cached_effective_target_indexed vect_usad_char {
      expr { [istarget i?86-*-*]
              || [istarget x86_64-*-*]
              || ([istarget aarch64*-*-*]
                  && ![check_effective_target_aarch64_sve])}}]
}

# Return 1 if the target plus current options supports both signed
# and unsigned average operations on vectors of bytes.

proc check_effective_target_vect_avg_qi {} {
    return [expr { [istarget aarch64*-*-*]
                   && ![check_effective_target_aarch64_sve] }]
}

# Return 1 if the target plus current options supports a vector
# demotion (packing) of shorts (to chars) and ints (to shorts) 
# using modulo arithmetic, 0 otherwise.
#
# This won't change for different subtargets so cache the result.
                                                                                
proc check_effective_target_vect_pack_trunc { } {
    return [check_cached_effective_target_indexed vect_pack_trunc {
      expr { ([istarget powerpc*-*-*] && ![istarget powerpc-*-linux*paired*])
             || [istarget i?86-*-*] || [istarget x86_64-*-*]
             || [istarget aarch64*-*-*]
             || [istarget spu-*-*]
             || ([istarget arm*-*-*] && [check_effective_target_arm_neon_ok]
                 && [check_effective_target_arm_little_endian])
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa])
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

# Return 1 if the target plus current options supports a vector
# promotion (unpacking) of chars (to shorts) and shorts (to ints), 0 otherwise.
#
# This won't change for different subtargets so cache the result.
                                   
proc check_effective_target_vect_unpack { } {
    return [check_cached_effective_target_indexed vect_unpack {
      expr { ([istarget powerpc*-*-*] && ![istarget powerpc-*paired*])
             || [istarget i?86-*-*] || [istarget x86_64-*-*]
             || [istarget spu-*-*]
             || [istarget ia64-*-*]
             || [istarget aarch64*-*-*]
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa])
             || ([istarget arm*-*-*] && [check_effective_target_arm_neon_ok]
                 && [check_effective_target_arm_little_endian])
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

# Return 1 if the target plus current options does not guarantee
# that its STACK_BOUNDARY is >= the reguired vector alignment.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_unaligned_stack { } {
    return [check_cached_effective_target_indexed unaligned_stack { expr 0 }]
}

# Return 1 if the target plus current options does not support a vector
# alignment mechanism, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_no_align { } {
    return [check_cached_effective_target_indexed vect_no_align {
      expr { [istarget mipsisa64*-*-*]
             || [istarget mips-sde-elf]
             || [istarget sparc*-*-*]
             || [istarget ia64-*-*]
             || [check_effective_target_arm_vect_no_misalign]
             || ([istarget powerpc*-*-*] && [check_p8vector_hw_available])
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_loongson_mmi]) }}]
}

# Return 1 if the target supports a vector misalign access, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_hw_misalign { } {
    return [check_cached_effective_target_indexed vect_hw_misalign {
        if { [istarget i?86-*-*] || [istarget x86_64-*-*]
             || ([istarget powerpc*-*-*] && [check_p8vector_hw_available])
             || [istarget aarch64*-*-*]
             || ([istarget mips*-*-*] && [et-is-effective-target mips_msa])
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) } {
          return 1
        }
        if { [istarget arm*-*-*]
             && ![check_effective_target_arm_vect_no_misalign] } {
          return 1
        }
        return 0
    }]
}


# Return 1 if arrays are aligned to the vector alignment
# boundary, 0 otherwise.

proc check_effective_target_vect_aligned_arrays { } {
    set et_vect_aligned_arrays 0
    if { (([istarget i?86-*-*] || [istarget x86_64-*-*])
          && !([is-effective-target ia32]
               || ([check_avx_available] && ![check_prefer_avx128])))
         || [istarget spu-*-*] } {
        set et_vect_aligned_arrays 1
    }

    verbose "check_effective_target_vect_aligned_arrays:\
             returning $et_vect_aligned_arrays" 2
    return $et_vect_aligned_arrays
}

# Return 1 if types of size 32 bit or less are naturally aligned
# (aligned to their type-size), 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_natural_alignment_32 { } {
    # FIXME: 32bit powerpc: guaranteed only if MASK_ALIGN_NATURAL/POWER.
    return [check_cached_effective_target_indexed natural_alignment_32 {
      if { ([istarget *-*-darwin*] && [is-effective-target lp64])
            || [istarget avr-*-*] } {
           return 0
         } else {
           return 1
         }
      }]
}

# Return 1 if types of size 64 bit or less are naturally aligned (aligned to their
# type-size), 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_natural_alignment_64 { } {
    return [check_cached_effective_target_indexed natural_alignment_64 {
      expr { ([is-effective-target lp64] && ![istarget *-*-darwin*])
              || [istarget spu-*-*] }
    }]
}

# Return 1 if all vector types are naturally aligned (aligned to their
# type-size), 0 otherwise.

proc check_effective_target_vect_natural_alignment { } {
    set et_vect_natural_alignment 1
    if { [check_effective_target_arm_eabi]
         || [istarget nvptx-*-*]
         || [istarget s390*-*-*] } {
        set et_vect_natural_alignment 0
    }
    verbose "check_effective_target_vect_natural_alignment:\
             returning $et_vect_natural_alignment" 2
    return $et_vect_natural_alignment
}

# Return true if fully-masked loops are supported.

proc check_effective_target_vect_fully_masked { } {
    return [check_effective_target_aarch64_sve]
}

# Return 1 if the target doesn't prefer any alignment beyond element
# alignment during vectorization.

proc check_effective_target_vect_element_align_preferred { } {
    return [expr { [check_effective_target_aarch64_sve]
                   && [check_effective_target_vect_variable_length] }]
}

# Return 1 if we can align stack data to the preferred vector alignment.

proc check_effective_target_vect_align_stack_vars { } {
    if { [check_effective_target_aarch64_sve] } {
        return [check_effective_target_vect_variable_length]
    }
    return 1
}

# Return 1 if vector alignment (for types of size 32 bit or less) is reachable, 0 otherwise.

proc check_effective_target_vector_alignment_reachable { } {
    set et_vector_alignment_reachable 0
    if { [check_effective_target_vect_aligned_arrays]
         || [check_effective_target_natural_alignment_32] } {
        set et_vector_alignment_reachable 1
    }
    verbose "check_effective_target_vector_alignment_reachable:\
             returning $et_vector_alignment_reachable" 2
    return $et_vector_alignment_reachable
}

# Return 1 if vector alignment for 64 bit is reachable, 0 otherwise.

proc check_effective_target_vector_alignment_reachable_for_64bit { } {
    set et_vector_alignment_reachable_for_64bit 0
    if { [check_effective_target_vect_aligned_arrays] 
         || [check_effective_target_natural_alignment_64] } {
        set et_vector_alignment_reachable_for_64bit 1
    }
    verbose "check_effective_target_vector_alignment_reachable_for_64bit:\
             returning $et_vector_alignment_reachable_for_64bit" 2
    return $et_vector_alignment_reachable_for_64bit
}

# Return 1 if the target only requires element alignment for vector accesses

proc check_effective_target_vect_element_align { } {
    return [check_cached_effective_target_indexed vect_element_align {
      expr { ([istarget arm*-*-*]
              && ![check_effective_target_arm_vect_no_misalign])
             || [check_effective_target_vect_hw_misalign] }}]
}

# Return 1 if we expect to see unaligned accesses in at least some
# vector dumps.

proc check_effective_target_vect_unaligned_possible { } {
    return [expr { ![check_effective_target_vect_element_align_preferred]
                   && (![check_effective_target_vect_no_align]
                       || [check_effective_target_vect_hw_misalign]) }]
}

# Return 1 if the target supports vector LOAD_LANES operations, 0 otherwise.

proc check_effective_target_vect_load_lanes { } {
    # We don't support load_lanes correctly on big-endian arm.
    return [check_cached_effective_target vect_load_lanes {
      expr { ([check_effective_target_arm_little_endian]
              && [check_effective_target_arm_neon_ok])
             || [istarget aarch64*-*-*] }}]
}

# Return 1 if the target supports vector masked stores.

proc check_effective_target_vect_masked_store { } {
    return [check_effective_target_aarch64_sve]
}

# Return 1 if the target supports vector scatter stores.

proc check_effective_target_vect_scatter_store { } {
    return [check_effective_target_aarch64_sve]
}

# Return 1 if the target supports vector conditional operations, 0 otherwise.

proc check_effective_target_vect_condition { } {
    return [check_cached_effective_target_indexed vect_condition {
      expr { [istarget aarch64*-*-*]
             || [istarget powerpc*-*-*]
             || [istarget ia64-*-*]
             || [istarget i?86-*-*] || [istarget x86_64-*-*]
             || [istarget spu-*-*]
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa])
             || ([istarget arm*-*-*]
                 && [check_effective_target_arm_neon_ok])
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

# Return 1 if the target supports vector conditional operations where
# the comparison has different type from the lhs, 0 otherwise.

proc check_effective_target_vect_cond_mixed { } {
    return [check_cached_effective_target_indexed vect_cond_mixed {
      expr { [istarget i?86-*-*] || [istarget x86_64-*-*]
             || [istarget aarch64*-*-*]
             || [istarget powerpc*-*-*] 
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa])
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

# Return 1 if the target supports vector char multiplication, 0 otherwise.

proc check_effective_target_vect_char_mult { } {
    return [check_cached_effective_target_indexed vect_char_mult {
      expr { [istarget aarch64*-*-*]
             || [istarget ia64-*-*]
             || [istarget i?86-*-*] || [istarget x86_64-*-*]
             || [check_effective_target_arm32]
             || [check_effective_target_powerpc_altivec]
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa])
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

# Return 1 if the target supports vector short multiplication, 0 otherwise.

proc check_effective_target_vect_short_mult { } {
    return [check_cached_effective_target_indexed vect_short_mult {
      expr { [istarget ia64-*-*]
             || [istarget spu-*-*]
             || [istarget i?86-*-*] || [istarget x86_64-*-*]
             || [istarget powerpc*-*-*]
             || [istarget aarch64*-*-*]
             || [check_effective_target_arm32]
             || ([istarget mips*-*-*]
                 && ([et-is-effective-target mips_msa]
                     || [et-is-effective-target mips_loongson_mmi]))
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

# Return 1 if the target supports vector int multiplication, 0 otherwise.

proc check_effective_target_vect_int_mult { } {
    return [check_cached_effective_target_indexed vect_int_mult {
      expr { ([istarget powerpc*-*-*] && ![istarget powerpc-*-linux*paired*])
             || [istarget spu-*-*]
             || [istarget i?86-*-*] || [istarget x86_64-*-*]
             || [istarget ia64-*-*]
             || [istarget aarch64*-*-*]
             || ([istarget mips*-*-*]
                 && [et-is-effective-target mips_msa])
             || [check_effective_target_arm32]
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

# Return 1 if the target supports 64 bit hardware vector
# multiplication of long operands with a long result, 0 otherwise.
#
# This can change for different subtargets so do not cache the result.

proc check_effective_target_vect_long_mult { } {
    if { [istarget i?86-*-*] || [istarget x86_64-*-*]
         || (([istarget powerpc*-*-*]
              && ![istarget powerpc-*-linux*paired*])
              && [check_effective_target_ilp32])
         || [is-effective-target arm_neon]
         || ([istarget sparc*-*-*] && [check_effective_target_ilp32])
         || [istarget aarch64*-*-*]
         || ([istarget mips*-*-*]
              && [et-is-effective-target mips_msa]) } {
        set answer 1
    } else {
        set answer 0
    }

    verbose "check_effective_target_vect_long_mult: returning $answer" 2
    return $answer
}

# Return 1 if the target supports vector even/odd elements extraction, 0 otherwise.

proc check_effective_target_vect_extract_even_odd { } {
    return [check_cached_effective_target_indexed extract_even_odd {
      expr { [istarget aarch64*-*-*]
             || [istarget powerpc*-*-*]
             || [is-effective-target arm_neon]
             || [istarget i?86-*-*] || [istarget x86_64-*-*]
             || [istarget ia64-*-*]
             || [istarget spu-*-*]
             || ([istarget mips*-*-*]
                 && ([et-is-effective-target mips_msa]
                     || [et-is-effective-target mpaired_single]))
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

# Return 1 if the target supports vector interleaving, 0 otherwise.

proc check_effective_target_vect_interleave { } {
    return [check_cached_effective_target_indexed vect_interleave {
      expr { [istarget aarch64*-*-*]
             || [istarget powerpc*-*-*]
             || [is-effective-target arm_neon]
             || [istarget i?86-*-*] || [istarget x86_64-*-*]
             || [istarget ia64-*-*]
             || [istarget spu-*-*]
             || ([istarget mips*-*-*]
                 && ([et-is-effective-target mpaired_single]
                     || [et-is-effective-target mips_msa]))
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

foreach N {2 3 4 8} {
    eval [string map [list N $N] {
        # Return 1 if the target supports 2-vector interleaving
        proc check_effective_target_vect_stridedN { } {
            return [check_cached_effective_target_indexed vect_stridedN {
                if { (N & -N) == N
                     && [check_effective_target_vect_interleave]
                     && [check_effective_target_vect_extract_even_odd] } {
                    return 1
                }
                if { ([istarget arm*-*-*]
                      || [istarget aarch64*-*-*]) && N >= 2 && N <= 4 } {
                    return 1
                }
                return 0
            }]
        }
    }]
}

# Return the list of vector sizes (in bits) that each target supports.
# A vector length of "0" indicates variable-length vectors.

proc available_vector_sizes { } {
    set result {}
    if { [istarget aarch64*-*-*] } {
        if { [check_effective_target_aarch64_sve] } {
            lappend result [aarch64_sve_bits]
        }
        lappend result 128 64
    } elseif { [istarget arm*-*-*]
                && [check_effective_target_arm_neon_ok] } {
        lappend result 128 64
    } elseif { (([istarget i?86-*-*] || [istarget x86_64-*-*])
                 && ([check_avx_available] && ![check_prefer_avx128])) } {
        lappend result 256 128
    } elseif { [istarget sparc*-*-*] } {
        lappend result 64
    } else {
        # The traditional default asumption.
        lappend result 128
    }
    return $result
}

# Return 1 if the target supports multiple vector sizes

proc check_effective_target_vect_multiple_sizes { } {
    return [expr { [llength [available_vector_sizes]] > 1 }]
}

# Return true if variable-length vectors are supported.

proc check_effective_target_vect_variable_length { } {
    return [expr { [lindex [available_vector_sizes] 0] == 0 }]
}

# Return 1 if the target supports vectors of 64 bits.

proc check_effective_target_vect64 { } {
    return [expr { [lsearch -exact [available_vector_sizes] 64] >= 0 }]
}

# Return 1 if the target supports vector copysignf calls.

proc check_effective_target_vect_call_copysignf { } {
    return [check_cached_effective_target_indexed vect_call_copysignf {
      expr { [istarget i?86-*-*] || [istarget x86_64-*-*]
             || [istarget powerpc*-*-*]
             || [istarget aarch64*-*-*] }}]
}

# Return 1 if the target supports hardware square root instructions.

proc check_effective_target_sqrt_insn { } {
    return [check_cached_effective_target sqrt_insn {
      expr { [istarget i?86-*-*] || [istarget x86_64-*-*]
             || [istarget powerpc*-*-*]
             || [istarget aarch64*-*-*]
             || ([istarget arm*-*-*] && [check_effective_target_arm_vfp_ok])
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

# Return 1 if the target supports vector sqrtf calls.

proc check_effective_target_vect_call_sqrtf { } {
    return [check_cached_effective_target_indexed vect_call_sqrtf {
      expr { [istarget aarch64*-*-*]
             || [istarget i?86-*-*] || [istarget x86_64-*-*]
             || ([istarget powerpc*-*-*] && [check_vsx_hw_available])
             || ([istarget s390*-*-*]
                 && [check_effective_target_s390_vx]) }}]
}

# Return 1 if the target supports vector lrint calls.

proc check_effective_target_vect_call_lrint { } {
    set et_vect_call_lrint 0
    if { (([istarget i?86-*-*] || [istarget x86_64-*-*])
          && [check_effective_target_ilp32]) } {
        set et_vect_call_lrint 1
    }

    verbose "check_effective_target_vect_call_lrint: returning $et_vect_call_lrint" 2
    return $et_vect_call_lrint
}

# Return 1 if the target supports vector btrunc calls.

proc check_effective_target_vect_call_btrunc { } {
    return [check_cached_effective_target_indexed vect_call_btrunc {
      expr { [istarget aarch64*-*-*] }}]
}

# Return 1 if the target supports vector btruncf calls.

proc check_effective_target_vect_call_btruncf { } {
    return [check_cached_effective_target_indexed vect_call_btruncf {
      expr { [istarget aarch64*-*-*] }}]
}

# Return 1 if the target supports vector ceil calls.

proc check_effective_target_vect_call_ceil { } {
    return [check_cached_effective_target_indexed vect_call_ceil {
      expr { [istarget aarch64*-*-*] }}]
}

# Return 1 if the target supports vector ceilf calls.

proc check_effective_target_vect_call_ceilf { } {
    return [check_cached_effective_target_indexed vect_call_ceilf {
      expr { [istarget aarch64*-*-*] }}]
}

# Return 1 if the target supports vector floor calls.

proc check_effective_target_vect_call_floor { } {
    return [check_cached_effective_target_indexed vect_call_floor {
      expr { [istarget aarch64*-*-*] }}]
}

# Return 1 if the target supports vector floorf calls.

proc check_effective_target_vect_call_floorf { } {
    return [check_cached_effective_target_indexed vect_call_floorf {
      expr { [istarget aarch64*-*-*] }}]
}

# Return 1 if the target supports vector lceil calls.

proc check_effective_target_vect_call_lceil { } {
    return [check_cached_effective_target_indexed vect_call_lceil {
      expr { [istarget aarch64*-*-*] }}]
}

# Return 1 if the target supports vector lfloor calls.

proc check_effective_target_vect_call_lfloor { } {
    return [check_cached_effective_target_indexed vect_call_lfloor {
      expr { [istarget aarch64*-*-*] }}]
}

# Return 1 if the target supports vector nearbyint calls.

proc check_effective_target_vect_call_nearbyint { } {
    return [check_cached_effective_target_indexed vect_call_nearbyint {
      expr { [istarget aarch64*-*-*] }}]
}

# Return 1 if the target supports vector nearbyintf calls.

proc check_effective_target_vect_call_nearbyintf { } {
    return [check_cached_effective_target_indexed vect_call_nearbyintf {
      expr { [istarget aarch64*-*-*] }}]
}

# Return 1 if the target supports vector round calls.

proc check_effective_target_vect_call_round { } {
    return [check_cached_effective_target_indexed vect_call_round {
      expr { [istarget aarch64*-*-*] }}]
}

# Return 1 if the target supports vector roundf calls.

proc check_effective_target_vect_call_roundf { } {
    return [check_cached_effective_target_indexed vect_call_roundf {
      expr { [istarget aarch64*-*-*] }}]
}

# Return 1 if the target supports AND, OR and XOR reduction.

proc check_effective_target_vect_logical_reduc { } {
    return [check_effective_target_aarch64_sve]
}

# Return 1 if the target supports the fold_extract_last optab.

proc check_effective_target_vect_fold_extract_last { } {
    return [check_effective_target_aarch64_sve]
}

# Return 1 if the target supports section-anchors

proc check_effective_target_section_anchors { } {
    return [check_cached_effective_target section_anchors {
      expr { [istarget powerpc*-*-*]
             || [istarget arm*-*-*]
             || [istarget aarch64*-*-*] }}]
}

# Return 1 if the target supports atomic operations on "int_128" values.

proc check_effective_target_sync_int_128 { } {
    if { [istarget spu-*-*] } {
        return 1
    } else {
        return 0
    }
}

# Return 1 if the target supports atomic operations on "int_128" values
# and can execute them.
# This requires support for both compare-and-swap and true atomic loads.

proc check_effective_target_sync_int_128_runtime { } {
    if { [istarget spu-*-*] } {
        return 1
    } else {
        return 0
    }
}

# Return 1 if the target supports atomic operations on "long long".
#
# Note: 32bit x86 targets require -march=pentium in dg-options.
# Note: 32bit s390 targets require -mzarch in dg-options.

proc check_effective_target_sync_long_long { } {
    if { [istarget i?86-*-*] || [istarget x86_64-*-*])
         || [istarget aarch64*-*-*]
         || [istarget arm*-*-*]
         || [istarget alpha*-*-*]
         || ([istarget sparc*-*-*] && [check_effective_target_lp64])
         || [istarget s390*-*-*]
         || [istarget spu-*-*] } {
        return 1
    } else {
        return 0
    }
}

# Return 1 if the target supports popcount on long.

proc check_effective_target_popcountl { } {
    return [check_no_messages_and_pattern popcountl "!\\(call" rtl-expand {
        int foo (long b)
          {
            return __builtin_popcountl (b);
          }
    } "" ]
}

# Return 1 if the target supports atomic operations on "long long"
# and can execute them.
#
# Note: 32bit x86 targets require -march=pentium in dg-options.

proc check_effective_target_sync_long_long_runtime { } {
    if { (([istarget x86_64-*-*] || [istarget i?86-*-*])
          && [check_cached_effective_target sync_long_long_available {
              check_runtime_nocache sync_long_long_available {
                  #include "cpuid.h"
                  int main ()
                  {
                      unsigned int eax, ebx, ecx, edx;
                      if (__get_cpuid (1, &eax, &ebx, &ecx, &edx))
                        return !(edx & bit_CMPXCHG8B);
                      return 1;
                  }
              } ""
          }])
         || [istarget aarch64*-*-*]
         || ([istarget arm*-*-linux-*]
             && [check_runtime sync_longlong_runtime {
                 #include <stdlib.h>
                 int main ()
                 {
                     long long l1;

                     if (sizeof (long long) != 8)
                     exit (1);

                     /* Just check for native;
                        checking for kernel fallback is tricky.  */
                     asm volatile ("ldrexd r0,r1, [%0]"
                                   : : "r" (&l1) : "r0", "r1");
                     exit (0);
                 }
             } "" ])
         || [istarget alpha*-*-*]
         || ([istarget sparc*-*-*]
             && [check_effective_target_lp64]
             && [check_effective_target_ultrasparc_hw])
         || [istarget spu-*-*]
         || ([istarget powerpc*-*-*] && [check_effective_target_lp64]) } {
        return 1
    } else {
        return 0
    }
}

# Return 1 if the target supports byte swap instructions.

proc check_effective_target_bswap { } {
    return [check_cached_effective_target bswap {
      expr { [istarget aarch64*-*-*]
             || [istarget alpha*-*-*]
             || [istarget i?86-*-*] || [istarget x86_64-*-*]
             || [istarget m68k-*-*]
             || [istarget powerpc*-*-*]
             || [istarget rs6000-*-*]
             || [istarget s390*-*-*]
             || ([istarget arm*-*-*]
                 && [check_no_compiler_messages_nocache arm_v6_or_later object {
                     #if __ARM_ARCH < 6
                     #error not armv6 or later
                     #endif
                     int i;
                 } ""]) }}]
}

# Return 1 if the target supports atomic operations on "int" and "long".

proc check_effective_target_sync_int_long { } {
# This is intentionally powerpc but not rs6000, rs6000 doesn't have the
# load-reserved/store-conditional instructions.
    return [check_cached_effective_target sync_int_long {
      expr { [istarget ia64-*-*]
             || [istarget i?86-*-*] || [istarget x86_64-*-*]
             || [istarget aarch64*-*-*]
             || [istarget alpha*-*-*] 
             || [istarget arm*-*-linux-*] 
             || ([istarget arm*-*-*]
                 && [check_effective_target_arm_acq_rel])
             || [istarget bfin*-*linux*]
             || [istarget hppa*-*linux*]
             || [istarget s390*-*-*] 
             || [istarget powerpc*-*-*]
             || [istarget crisv32-*-*] || [istarget cris-*-*]
             || ([istarget sparc*-*-*] && [check_effective_target_sparc_v9])
             || [istarget spu-*-*]
             || ([istarget arc*-*-*] && [check_effective_target_arc_atomic])
             || [check_effective_target_mips_llsc] }}]
}

# Return 1 if the target supports atomic operations on "char" and "short".

proc check_effective_target_sync_char_short { } {
# This is intentionally powerpc but not rs6000, rs6000 doesn't have the
# load-reserved/store-conditional instructions.
    return [check_cached_effective_target sync_char_short {
      expr { [istarget aarch64*-*-*]
             || [istarget ia64-*-*]
             || [istarget i?86-*-*] || [istarget x86_64-*-*]
             || [istarget alpha*-*-*] 
             || [istarget arm*-*-linux-*] 
             || ([istarget arm*-*-*]
                 && [check_effective_target_arm_acq_rel])
             || [istarget hppa*-*linux*]
             || [istarget s390*-*-*] 
             || [istarget powerpc*-*-*]
             || [istarget crisv32-*-*] || [istarget cris-*-*]
             || ([istarget sparc*-*-*] && [check_effective_target_sparc_v9])
             || [istarget spu-*-*]
             || ([istarget arc*-*-*] && [check_effective_target_arc_atomic])
             || [check_effective_target_mips_llsc] }}]
}

# Return 1 if the target uses a ColdFire FPU.

proc check_effective_target_coldfire_fpu { } {
    return [check_no_compiler_messages coldfire_fpu assembly {
        #ifndef __mcffpu__
        #error !__mcffpu__
        #endif
    }]
}

# Return true if this is a uClibc target.

proc check_effective_target_uclibc {} {
    return [check_no_compiler_messages uclibc object {
        #include <features.h>
        #if !defined (__UCLIBC__)
        #error !__UCLIBC__
        #endif
    }]
}

# Return true if this is a uclibc target and if the uclibc feature
# described by __$feature__ is not present.

proc check_missing_uclibc_feature {feature} {
    return [check_no_compiler_messages $feature object "
        #include <features.h>
        #if !defined (__UCLIBC) || defined (__${feature}__)
        #error FOO
        #endif
    "]
}

# Return true if this is a Newlib target.

proc check_effective_target_newlib {} {
    return [check_no_compiler_messages newlib object {
        #include <newlib.h>
    }]
}

# Return true if GCC was configured with --enable-newlib-nano-formatted-io
proc check_effective_target_newlib_nano_io { } {
    return [check_configured_with "--enable-newlib-nano-formatted-io"]
}

# Some newlib versions don't provide a frexpl and instead depend
# on frexp to implement long double conversions in their printf-like
# functions.  This leads to broken results.  Detect such versions here.

proc check_effective_target_newlib_broken_long_double_io {} {
  if { [is-effective-target newlib] && ![is-effective-target frexpl] } {
        return 1
  }
  return 0
}

# Return true if this is NOT a Bionic target.

proc check_effective_target_non_bionic {} {
    return [check_no_compiler_messages non_bionic object {
        #include <ctype.h>
        #if defined (__BIONIC__)
        #error FOO
        #endif
    }]
}

# Return true if this target has error.h header.

proc check_effective_target_error_h {} {
    return [check_no_compiler_messages error_h object {
 #include <error.h>
    }]
}

# Return true if this target has tgmath.h header.

proc check_effective_target_tgmath_h {} {
    return [check_no_compiler_messages tgmath_h object {
 #include <tgmath.h>
    }]
}

# Return true if target's libc supports complex functions.

proc check_effective_target_libc_has_complex_functions {} {
    return [check_no_compiler_messages libc_has_complex_functions object {
 #include <complex.h>
    }]
}

# Return 1 if
#   (a) an error of a few ULP is expected in string to floating-point
#       conversion functions; and
#   (b) overflow is not always detected correctly by those functions.

proc check_effective_target_lax_strtofp {} {
    # By default, assume that all uClibc targets suffer from this.
    return [check_effective_target_uclibc]
}

# Return 1 if this is a target for which wcsftime is a dummy
# function that always returns 0.

proc check_effective_target_dummy_wcsftime {} {
    # By default, assume that all uClibc targets suffer from this.
    return [check_effective_target_uclibc]
}

# Return 1 if constructors with initialization priority arguments are
# supposed on this target.

proc check_effective_target_init_priority {} {
    return [check_no_compiler_messages init_priority assembly "
        void f() __attribute__((constructor (1000)));
        void f() \{\}
    "]
}

# Return 1 if the target matches the effective target 'arg', 0 otherwise.
# This can be used with any check_* proc that takes no argument and
# returns only 1 or 0.  It could be used with check_* procs that take
# arguments with keywords that pass particular arguments.

proc is-effective-target { arg } {
    global et_index
    set selected 0
    if { ![info exists et_index] } {
        # Initialize the effective target index that is used in some
        # check_effective_target_* procs.
        set et_index 0
    }
    if { [info procs check_effective_target_${arg}] != [list] } {
        set selected [check_effective_target_${arg}]
    } else {
        switch $arg {
          "vmx_hw"         { set selected [check_vmx_hw_available] }
          "vsx_hw"         { set selected [check_vsx_hw_available] }
          "p8vector_hw"    { set selected [check_p8vector_hw_available] }
          "p9vector_hw"    { set selected [check_p9vector_hw_available] }
          "p9modulo_hw"    { set selected [check_p9modulo_hw_available] }
          "ppc_float128_sw" { set selected [check_ppc_float128_sw_available] }
          "ppc_float128_hw" { set selected [check_ppc_float128_hw_available] }
          "ppc_recip_hw"   { set selected [check_ppc_recip_hw_available] }
          "ppc_cpu_supports_hw" { set selected [check_ppc_cpu_supports_hw_available] }
          "dfp_hw"         { set selected [check_dfp_hw_available] }
          "htm_hw"         { set selected [check_htm_hw_available] }
          "named_sections" { set selected [check_named_sections_available] }
          "gc_sections"    { set selected [check_gc_sections_available] }
          "cxa_atexit"     { set selected [check_cxa_atexit_available] }
          default          { error "unknown effective target keyword `$arg'" }
        }
    }

    verbose "is-effective-target: $arg $selected" 2
    return $selected
}

# Return 1 if the argument is an effective-target keyword, 0 otherwise.

proc is-effective-target-keyword { arg } {
    if { [info procs check_effective_target_${arg}] != [list] } {
        return 1
    } else {
        # These have different names for their check_* procs.
        switch $arg {
          "vmx_hw"         { return 1 }
          "vsx_hw"         { return 1 }
          "p8vector_hw"    { return 1 }
          "p9vector_hw"    { return 1 }
          "p9modulo_hw"    { return 1 }
          "ppc_float128_sw" { return 1 }
          "ppc_float128_hw" { return 1 }
          "ppc_recip_hw"   { return 1 }
          "dfp_hw"         { return 1 }
          "htm_hw"         { return 1 }
          "named_sections" { return 1 }
          "gc_sections"    { return 1 }
          "cxa_atexit"     { return 1 }
          default          { return 0 }
        }
    }
}

# Execute tests for all targets in EFFECTIVE_TARGETS list.  Set et_index to
# indicate what target is currently being processed.  This is for
# the vectorizer tests, e.g. vect_int, to keep track what target supports
# a given feature.

proc et-dg-runtest { runtest testcases flags default-extra-flags } {
    global dg-do-what-default
    global EFFECTIVE_TARGETS
    global et_index

    if { [llength $EFFECTIVE_TARGETS] > 0 } {
        foreach target $EFFECTIVE_TARGETS {
            set target_flags $flags
            set dg-do-what-default compile
            set et_index [lsearch -exact $EFFECTIVE_TARGETS $target]
            if { [info procs add_options_for_${target}] != [list] } {
                set target_flags [add_options_for_${target} "$flags"]
            }
            if { [info procs check_effective_target_${target}_runtime]
                 != [list] && [check_effective_target_${target}_runtime] } {
                set dg-do-what-default run
            }
            $runtest $testcases $target_flags ${default-extra-flags}
        }
    } else {
        set et_index 0
        $runtest $testcases $flags ${default-extra-flags}
    }
}

# Return 1 if a target matches the target in EFFECTIVE_TARGETS at index
# et_index, 0 otherwise.

proc et-is-effective-target { target } {
    global EFFECTIVE_TARGETS
    global et_index

    if { [llength $EFFECTIVE_TARGETS] > $et_index
         && [lindex $EFFECTIVE_TARGETS $et_index] == $target } {
            return 1
    }
    return 0
}

# Return 1 if target default to short enums

proc check_effective_target_short_enums { } {
    return [check_no_compiler_messages short_enums assembly {
        enum foo { bar };
        int s[sizeof (enum foo) == 1 ? 1 : -1];
    }]
}

# Return 1 if target supports merging string constants at link time.

proc check_effective_target_string_merging { } {
    return [check_no_messages_and_pattern string_merging \
                "rodata\\.str" assembly {
                    const char *var = "String";
                } {-O2}]
}

# Return 1 if target has the basic signed and unsigned types in
# <stdint.h>, 0 otherwise.  This will be obsolete when GCC ensures a
# working <stdint.h> for all targets.

proc check_effective_target_stdint_types { } {
    return [check_no_compiler_messages stdint_types assembly {
        #include <stdint.h>
        int8_t a; int16_t b; int32_t c; int64_t d;
        uint8_t e; uint16_t f; uint32_t g; uint64_t h;
    }]
}

# Return 1 if target has the basic signed and unsigned types in
# <inttypes.h>, 0 otherwise.  This is for tests that GCC's notions of
# these types agree with those in the header, as some systems have
# only <inttypes.h>.

proc check_effective_target_inttypes_types { } {
    return [check_no_compiler_messages inttypes_types assembly {
        #include <inttypes.h>
        int8_t a; int16_t b; int32_t c; int64_t d;
        uint8_t e; uint16_t f; uint32_t g; uint64_t h;
    }]
}

# Return 1 if programs are intended to be run on a simulator
# (i.e. slowly) rather than hardware (i.e. fast).

proc check_effective_target_simulator { } {

    # All "src/sim" simulators set this one.
    if [board_info target exists is_simulator] {
        return [board_info target is_simulator]
    }

    # The "sid" simulators don't set that one, but at least they set
    # this one.
    if [board_info target exists slow_simulator] {
        return [board_info target slow_simulator]
    }

    return 0
}

# Return 1 if programs are intended to be run on hardware rather than
# on a simulator

proc check_effective_target_hw { } {

    # All "src/sim" simulators set this one.
    if [board_info target exists is_simulator] {
        if [board_info target is_simulator] {
          return 0
        } else {
          return 1
        }
    }

    # The "sid" simulators don't set that one, but at least they set
    # this one.
    if [board_info target exists slow_simulator] {
        if [board_info target slow_simulator] {
          return 0
        } else {
          return 1
        }
    }

    return 1
}

# Return 1 if the target is a VxWorks kernel.

proc check_effective_target_vxworks_kernel { } {
    return [check_no_compiler_messages vxworks_kernel assembly {
        #if !defined __vxworks || defined __RTP__
        #error NO
        #endif
    }]
}

# Return 1 if the target is a VxWorks RTP.

proc check_effective_target_vxworks_rtp { } {
    return [check_no_compiler_messages vxworks_rtp assembly {
        #if !defined __vxworks || !defined __RTP__
        #error NO
        #endif
    }]
}

# Return 1 if the target is expected to provide wide character support.

proc check_effective_target_wchar { } {
    if {[check_missing_uclibc_feature UCLIBC_HAS_WCHAR]} {
        return 0
    }
    return [check_no_compiler_messages wchar assembly {
        #include <wchar.h>
    }]
}

# Return 1 if the target has <pthread.h>.

proc check_effective_target_pthread_h { } {
    return [check_no_compiler_messages pthread_h assembly {
        #include <pthread.h>
    }]
}

# Return 1 if the target can truncate a file from a file-descriptor,
# as used by libgfortran/io/unix.c:fd_truncate; i.e. ftruncate or
# chsize.  We test for a trivially functional truncation; no stubs.
# As libgfortran uses _FILE_OFFSET_BITS 64, we do too; it'll cause a
# different function to be used.

proc check_effective_target_fd_truncate { } {
    set prog {
        #define _FILE_OFFSET_BITS 64
        #include <unistd.h>
        #include <stdio.h>
        #include <stdlib.h>
        #include <string.h>
        int main ()
        {
          FILE *f = fopen ("tst.tmp", "wb");
          int fd;
          const char t[] = "test writing more than ten characters";
          char s[11];
          int status = 0;
          fd = fileno (f);
          write (fd, t, sizeof (t) - 1);
          lseek (fd, 0, 0);
          if (ftruncate (fd, 10) != 0)
            status = 1;
          close (fd);
          fclose (f);
          if (status)
            {
              unlink ("tst.tmp");
              exit (status);
            }
          f = fopen ("tst.tmp", "rb");
          if (fread (s, 1, sizeof (s), f) != 10 || strncmp (s, t, 10) != 0)
            status = 1;
          fclose (f);
          unlink ("tst.tmp");
          exit (status);
        }
    }

    if { [check_runtime ftruncate $prog] } {
      return 1;
    }

    regsub "ftruncate" $prog "chsize" prog
    return [check_runtime chsize $prog]
}

# Add to FLAGS all the target-specific flags needed to access the c99 runtime.

proc add_options_for_c99_runtime { flags } {
    if { [istarget *-*-solaris2*] } {
        return "$flags -std=c99"
    }
    if { [istarget powerpc-*-darwin*] } {
        return "$flags -mmacosx-version-min=10.3"
    }
    return $flags
}

# Add to FLAGS all the target-specific flags needed to enable
# full IEEE compliance mode.

proc add_options_for_ieee { flags } {
    if { [istarget alpha*-*-*]
         || [istarget sh*-*-*] } {
       return "$flags -mieee"
    }
    if { [istarget rx-*-*] } {
       return "$flags -mnofpu"
    }
    return $flags
}

if {![info exists flags_to_postpone]} {
    set flags_to_postpone ""
}

# Add to FLAGS the flags needed to enable functions to bind locally
# when using pic/PIC passes in the testsuite.
proc add_options_for_bind_pic_locally { flags } {
    global flags_to_postpone

    # Instead of returning 'flags' with the -fPIE or -fpie appended, we save it
    # in 'flags_to_postpone' and append it later in gcc_target_compile procedure in
    # order to make sure that the multilib_flags doesn't override this.

    if {[check_no_compiler_messages using_pic2 assembly {
        #if __PIC__ != 2
        #error __PIC__ != 2
        #endif
    }]} {
        set flags_to_postpone "-fPIE"
        return $flags
    }
    if {[check_no_compiler_messages using_pic1 assembly {
        #if __PIC__ != 1
        #error __PIC__ != 1
        #endif
    }]} {
        set flags_to_postpone "-fpie"
        return $flags
    }
    return $flags
}

# Add to FLAGS the flags needed to enable 64-bit vectors.

proc add_options_for_double_vectors { flags } {
    if [is-effective-target arm_neon_ok] {
        return "$flags -mvectorize-with-neon-double"
    }

    return $flags
}

# Add to FLAGS the flags needed to define the STACK_SIZE macro.

proc add_options_for_stack_size { flags } {
    if [is-effective-target stack_size] {
        set stack_size [dg-effective-target-value stack_size]
        return "$flags -DSTACK_SIZE=$stack_size"
    }

    return $flags
}

# Return 1 if the target provides a full C99 runtime.

proc check_effective_target_c99_runtime { } {
    return [check_cached_effective_target c99_runtime {
        global srcdir

        set file [open "$srcdir/gcc.dg/builtins-config.h"]
        set contents [read $file]
        close $file
        append contents {
            #ifndef HAVE_C99_RUNTIME
            #error !HAVE_C99_RUNTIME
            #endif
        }
        check_no_compiler_messages_nocache c99_runtime assembly \
            $contents [add_options_for_c99_runtime ""]
    }]
}

# Return 1 if the target provides the D runtime.

proc check_effective_target_d_runtime { } {
    return [check_no_compiler_messages d_runtime executable {
        // D
        module mod;

        extern(C) int main() {
            return 0;
        }
    }]
}

# Return 1 if  target wchar_t is at least 4 bytes.

proc check_effective_target_4byte_wchar_t { } {
    return [check_no_compiler_messages 4byte_wchar_t object {
        int dummy[sizeof (__WCHAR_TYPE__) >= 4 ? 1 : -1];
    }]
}

# Return 1 if the target supports automatic stack alignment.

proc check_effective_target_automatic_stack_alignment  { } {
    # Ordinarily x86 supports automatic stack alignment ...
    if { [istarget i?86*-*-*] || [istarget x86_64-*-*] } then {
        if { [istarget *-*-mingw*] || [istarget *-*-cygwin*] } {
            # ... except Win64 SEH doesn't.  Succeed for Win32 though.
            return [check_effective_target_ilp32];
        }
        return 1;
    }
    return 0;
}

# Return true if we are compiling for AVX target.

proc check_avx_available { } {
  if { [check_no_compiler_messages avx_available assembly {
    #ifndef __AVX__
    #error unsupported
    #endif
  } ""] } {
    return 1;
  }
  return 0;
}

# Return true if we are compiling for AVX2 target.

proc check_avx2_available { } {
  if { [check_no_compiler_messages avx_available assembly {
    #ifndef __AVX2__
    #error unsupported
    #endif
  } ""] } {
    return 1;
  }
  return 0;
}

# Return true if we are compiling for SSSE3 target.

proc check_ssse3_available { } {
  if { [check_no_compiler_messages sse3a_available assembly {
    #ifndef __SSSE3__
    #error unsupported
    #endif
  } ""] } {
    return 1;
  }
  return 0;
}

# Return true if 32- and 16-bytes vectors are available.

proc check_effective_target_vect_sizes_32B_16B { } {
    return [expr { [available_vector_sizes] == [list 256 128] }]
}

# Return true if 16- and 8-bytes vectors are available.

proc check_effective_target_vect_sizes_16B_8B { } {
  if { [check_avx_available]
       || [is-effective-target arm_neon]
       || [istarget aarch64*-*-*] } {
     return 1;
  } else {
    return 0;
  }
}


# Return true if 128-bits vectors are preferred even if 256-bits vectors
# are available.

proc check_prefer_avx128 { } {
    if ![check_avx_available] {
      return 0;
    }
    return [check_no_messages_and_pattern avx_explicit "xmm" assembly {
      float a[1024],b[1024],c[1024];
      void foo (void) { int i; for (i = 0; i < 1024; i++) a[i]=b[i]+c[i];}
    } "-O2 -ftree-vectorize"]
}


# Return 1 if avx512f instructions can be compiled.

proc check_effective_target_avx512f { } {
    return [check_no_compiler_messages avx512f object {
        typedef double __m512d __attribute__ ((__vector_size__ (64)));
        typedef double __m128d __attribute__ ((__vector_size__ (16)));

        __m512d _mm512_add (__m512d a)
        {
          return __builtin_ia32_addpd512_mask (a, a, a, 1, 4);
        }

        __m128d _mm128_add (__m128d a)
        {
          return __builtin_ia32_addsd_round (a, a, 8);
        }

        __m128d _mm128_getmant (__m128d a)
        {
          return __builtin_ia32_getmantsd_round (a, a, 0, 8);
        }
    } "-O2 -mavx512f" ]
}

# Return 1 if avx instructions can be compiled.

proc check_effective_target_avx { } {
    if { !([istarget i?86-*-*] || [istarget x86_64-*-*]) } {
        return 0
    }
    return [check_no_compiler_messages avx object {
        void _mm256_zeroall (void)
        {
           __builtin_ia32_vzeroall ();
        }
    } "-O2 -mavx" ]
}

# Return 1 if avx2 instructions can be compiled.
proc check_effective_target_avx2 { } {
    return [check_no_compiler_messages avx2 object {
        typedef long long __v4di __attribute__ ((__vector_size__ (32)));
        __v4di
        mm256_is32_andnotsi256  (__v4di __X, __v4di __Y)
        {
           return __builtin_ia32_andnotsi256 (__X, __Y);
        }
    } "-O0 -mavx2" ]
}

# Return 1 if sse instructions can be compiled.
proc check_effective_target_sse { } {
    return [check_no_compiler_messages sse object {
        int main ()
        {
            __builtin_ia32_stmxcsr ();
            return 0;
        }
    } "-O2 -msse" ]
}

# Return 1 if sse2 instructions can be compiled.
proc check_effective_target_sse2 { } {
    return [check_no_compiler_messages sse2 object {
        typedef long long __m128i __attribute__ ((__vector_size__ (16)));
        
        __m128i _mm_srli_si128 (__m128i __A, int __N)
        {
            return (__m128i)__builtin_ia32_psrldqi128 (__A, 8);
        }
    } "-O2 -msse2" ]
}

# Return 1 if sse4.1 instructions can be compiled.
proc check_effective_target_sse4 { } {
    return [check_no_compiler_messages sse4.1 object {
        typedef long long __m128i __attribute__ ((__vector_size__ (16)));
        typedef int __v4si __attribute__ ((__vector_size__ (16)));

        __m128i _mm_mullo_epi32 (__m128i __X, __m128i __Y)
        {
            return (__m128i) __builtin_ia32_pmulld128 ((__v4si)__X,
                                                       (__v4si)__Y);
        }
    } "-O2 -msse4.1" ]
}

# Return 1 if F16C instructions can be compiled.

proc check_effective_target_f16c { } {
    return [check_no_compiler_messages f16c object {
        #include "immintrin.h"
        float
        foo (unsigned short val)
        {
          return _cvtsh_ss (val);
        }
    } "-O2 -mf16c" ]
}

proc check_effective_target_ms_hook_prologue { } {
    if { [check_no_compiler_messages ms_hook_prologue object {
             void __attribute__ ((__ms_hook_prologue__)) foo ();
         } ""] } {
        return 1
    } else {
        return 0
    }
}

# Return 1 if 3dnow instructions can be compiled.
proc check_effective_target_3dnow { } {
    return [check_no_compiler_messages 3dnow object {
        typedef int __m64 __attribute__ ((__vector_size__ (8)));
        typedef float __v2sf __attribute__ ((__vector_size__ (8)));

        __m64 _m_pfadd (__m64 __A, __m64 __B)
        {
            return (__m64) __builtin_ia32_pfadd ((__v2sf)__A, (__v2sf)__B);
        }
    } "-O2 -m3dnow" ]
}

# Return 1 if sse3 instructions can be compiled.
proc check_effective_target_sse3 { } {
    return [check_no_compiler_messages sse3 object {
        typedef double __m128d __attribute__ ((__vector_size__ (16)));
        typedef double __v2df __attribute__ ((__vector_size__ (16)));

        __m128d _mm_addsub_pd (__m128d __X, __m128d __Y)
        {
            return (__m128d) __builtin_ia32_addsubpd ((__v2df)__X, (__v2df)__Y);
        }
    } "-O2 -msse3" ]
}

# Return 1 if ssse3 instructions can be compiled.
proc check_effective_target_ssse3 { } {
    return [check_no_compiler_messages ssse3 object {
        typedef long long __m128i __attribute__ ((__vector_size__ (16)));
        typedef int __v4si __attribute__ ((__vector_size__ (16)));

        __m128i _mm_abs_epi32 (__m128i __X)
        {
            return (__m128i) __builtin_ia32_pabsd128 ((__v4si)__X);
        }
    } "-O2 -mssse3" ]
}

# Return 1 if aes instructions can be compiled.
proc check_effective_target_aes { } {
    return [check_no_compiler_messages aes object {
        typedef long long __m128i __attribute__ ((__vector_size__ (16)));
        typedef long long __v2di __attribute__ ((__vector_size__ (16)));

        __m128i _mm_aesimc_si128 (__m128i __X)
        {
            return (__m128i) __builtin_ia32_aesimc128 ((__v2di)__X);
        }
    } "-O2 -maes" ]
}

# Return 1 if vaes instructions can be compiled.
proc check_effective_target_vaes { } {
    return [check_no_compiler_messages vaes object {
        typedef long long __m128i __attribute__ ((__vector_size__ (16)));
        typedef long long __v2di __attribute__ ((__vector_size__ (16)));

        __m128i _mm_aesimc_si128 (__m128i __X)
        {
            return (__m128i) __builtin_ia32_aesimc128 ((__v2di)__X);
        }
    } "-O2 -maes -mavx" ]
}

# Return 1 if pclmul instructions can be compiled.
proc check_effective_target_pclmul { } {
    return [check_no_compiler_messages pclmul object {
        typedef long long __m128i __attribute__ ((__vector_size__ (16)));
        typedef long long __v2di __attribute__ ((__vector_size__ (16)));

        __m128i pclmulqdq_test (__m128i __X, __m128i __Y)
        {
            return (__m128i) __builtin_ia32_pclmulqdq128 ((__v2di)__X,
                                                          (__v2di)__Y,
                                                          1);
        }
    } "-O2 -mpclmul" ]
}

# Return 1 if vpclmul instructions can be compiled.
proc check_effective_target_vpclmul { } {
    return [check_no_compiler_messages vpclmul object {
        typedef long long __m128i __attribute__ ((__vector_size__ (16)));
        typedef long long __v2di __attribute__ ((__vector_size__ (16)));

        __m128i pclmulqdq_test (__m128i __X, __m128i __Y)
        {
            return (__m128i) __builtin_ia32_pclmulqdq128 ((__v2di)__X,
                                                          (__v2di)__Y,
                                                          1);
        }
    } "-O2 -mpclmul -mavx" ]
}

# Return 1 if sse4a instructions can be compiled.
proc check_effective_target_sse4a { } {
    return [check_no_compiler_messages sse4a object {
        typedef long long __m128i __attribute__ ((__vector_size__ (16)));
        typedef long long __v2di __attribute__ ((__vector_size__ (16)));

        __m128i _mm_insert_si64 (__m128i __X,__m128i __Y)
        {
            return (__m128i) __builtin_ia32_insertq ((__v2di)__X, (__v2di)__Y);
        }
    } "-O2 -msse4a" ]
}

# Return 1 if fma4 instructions can be compiled.
proc check_effective_target_fma4 { } {
    return [check_no_compiler_messages fma4 object {
        typedef float __m128 __attribute__ ((__vector_size__ (16)));
        typedef float __v4sf __attribute__ ((__vector_size__ (16)));
        __m128 _mm_macc_ps(__m128 __A, __m128 __B, __m128 __C)
        {
            return (__m128) __builtin_ia32_vfmaddps ((__v4sf)__A,
                                                     (__v4sf)__B,
                                                     (__v4sf)__C);
        }
    } "-O2 -mfma4" ]
}

# Return 1 if fma instructions can be compiled.
proc check_effective_target_fma { } {
    return [check_no_compiler_messages fma object {
        typedef float __m128 __attribute__ ((__vector_size__ (16)));
        typedef float __v4sf __attribute__ ((__vector_size__ (16)));
        __m128 _mm_macc_ps(__m128 __A, __m128 __B, __m128 __C)
        {
            return (__m128) __builtin_ia32_vfmaddps ((__v4sf)__A,
                                                     (__v4sf)__B,
                                                     (__v4sf)__C);
        }
    } "-O2 -mfma" ]
}

# Return 1 if xop instructions can be compiled.
proc check_effective_target_xop { } {
    return [check_no_compiler_messages xop object {
        typedef long long __m128i __attribute__ ((__vector_size__ (16)));
        typedef short __v8hi __attribute__ ((__vector_size__ (16)));
        __m128i _mm_maccs_epi16(__m128i __A, __m128i __B, __m128i __C)
        {
            return (__m128i) __builtin_ia32_vpmacssww ((__v8hi)__A,
                                                       (__v8hi)__B,
                                                       (__v8hi)__C);
        }
    } "-O2 -mxop" ]
}

# Return 1 if lzcnt instruction can be compiled.
proc check_effective_target_lzcnt { } {
    return [check_no_compiler_messages lzcnt object {
        unsigned short _lzcnt (unsigned short __X)
        {
           return __builtin_clzs (__X);
        }
    } "-mlzcnt" ]
}

# Return 1 if bmi instructions can be compiled.
proc check_effective_target_bmi { } {
    return [check_no_compiler_messages bmi object {
        unsigned int __bextr_u32 (unsigned int __X, unsigned int __Y)
        {
          return __builtin_ia32_bextr_u32 (__X, __Y);
        }
    } "-mbmi" ]
}

# Return 1 if ADX instructions can be compiled.
proc check_effective_target_adx { } {
    return [check_no_compiler_messages adx object {
        unsigned char
        _adxcarry_u32 (unsigned char __CF, unsigned int __X,
                   unsigned int __Y, unsigned int *__P)
        {
            return __builtin_ia32_addcarryx_u32 (__CF, __X, __Y, __P);
        }
    } "-madx" ]
}

# Return 1 if rtm instructions can be compiled.
proc check_effective_target_rtm { } {
    return [check_no_compiler_messages rtm object {
        void
        _rtm_xend (void)
        {
            return __builtin_ia32_xend ();
        }
    } "-mrtm" ]
}

# Return 1 if avx512vl instructions can be compiled.
proc check_effective_target_avx512vl { } {
    return [check_no_compiler_messages avx512vl object {
        typedef long long __v4di __attribute__ ((__vector_size__ (32)));
        __v4di
        mm256_and_epi64  (__v4di __X, __v4di __Y)
        {
            __v4di __W;
            return __builtin_ia32_pandq256_mask (__X, __Y, __W, -1);
        }
    } "-mavx512vl" ]
}

# Return 1 if avx512cd instructions can be compiled.
proc check_effective_target_avx512cd { } {
    return [check_no_compiler_messages avx512cd_trans object {
        typedef long long __v8di __attribute__ ((__vector_size__ (64)));
        __v8di
        _mm512_conflict_epi64 (__v8di __W, __v8di __A)
        {
          return (__v8di) __builtin_ia32_vpconflictdi_512_mask ((__v8di) __A,
                                                                 (__v8di) __W,
                                                                 -1);
        }
   } "-Wno-psabi -mavx512cd" ]
}

# Return 1 if avx512er instructions can be compiled.
proc check_effective_target_avx512er { } {
    return [check_no_compiler_messages avx512er_trans object {
        typedef float __v16sf __attribute__ ((__vector_size__ (64)));
        __v16sf
        mm512_exp2a23_ps  (__v16sf __X)
        {
            return __builtin_ia32_exp2ps_mask (__X, __X, -1, 4);
        }
   } "-Wno-psabi -mavx512er" ]
}

# Return 1 if sha instructions can be compiled.
proc check_effective_target_sha { } {
    return [check_no_compiler_messages sha object {
        typedef long long __m128i __attribute__ ((__vector_size__ (16)));
        typedef int __v4si __attribute__ ((__vector_size__ (16)));

        __m128i _mm_sha1msg1_epu32 (__m128i __X, __m128i __Y)
        {
            return (__m128i) __builtin_ia32_sha1msg1 ((__v4si)__X,
                                                      (__v4si)__Y);
        }
    } "-O2 -msha" ]
}

# Return 1 if avx512dq instructions can be compiled.
proc check_effective_target_avx512dq { } {
    return [check_no_compiler_messages avx512dq object {
        typedef long long __v8di __attribute__ ((__vector_size__ (64)));
        __v8di
        _mm512_mask_mullo_epi64 (__v8di __W, __v8di __A, __v8di __B)
        {
            return (__v8di) __builtin_ia32_pmullq512_mask ((__v8di) __A,
                                                            (__v8di) __B,
                                                            (__v8di) __W,
                                                            -1);
        }
    } "-mavx512dq" ]
}

# Return 1 if avx512bw instructions can be compiled.
proc check_effective_target_avx512bw { } {
    return [check_no_compiler_messages avx512bw object {
        typedef short __v32hi __attribute__ ((__vector_size__ (64)));
        __v32hi
        _mm512_mask_mulhrs_epi16 (__v32hi __W, __v32hi __A, __v32hi __B)
        {
            return (__v32hi) __builtin_ia32_pmulhrsw512_mask ((__v32hi) __A,
                                                            (__v32hi) __B,
                                                            (__v32hi) __W,
                                                            -1);
        }
    } "-mavx512bw" ]
}

# Return 1 if avx512ifma instructions can be compiled.
proc check_effective_target_avx512ifma { } {
    return [check_no_compiler_messages avx512ifma object {
        typedef long long __v8di __attribute__ ((__vector_size__ (64)));
        __v8di
        _mm512_madd52lo_epu64 (__v8di __X, __v8di __Y, __v8di __Z)
        {
          return (__v8di) __builtin_ia32_vpmadd52luq512_mask ((__v8di) __X,
                                                               (__v8di) __Y,
                                                               (__v8di) __Z,
                                                               -1);
        }
    } "-mavx512ifma" ]
}

# Return 1 if avx512vbmi instructions can be compiled.
proc check_effective_target_avx512vbmi { } {
    return [check_no_compiler_messages avx512vbmi object {
        typedef char __v64qi __attribute__ ((__vector_size__ (64)));
        __v64qi
        _mm512_multishift_epi64_epi8 (__v64qi __X, __v64qi __Y)
        {
          return (__v64qi) __builtin_ia32_vpmultishiftqb512_mask ((__v64qi) __X,
                                                                 (__v64qi) __Y,
                                                                 (__v64qi) __Y,
                                                                 -1);
        }
    } "-mavx512vbmi" ]
}

# Return 1 if avx512_4fmaps instructions can be compiled.
proc check_effective_target_avx5124fmaps { } {
    return [check_no_compiler_messages avx5124fmaps object {
        typedef float __v16sf __attribute__ ((__vector_size__ (64)));
        typedef float __v4sf __attribute__ ((__vector_size__ (16)));

        __v16sf
        _mm512_mask_4fmadd_ps (__v16sf __DEST, __v16sf __A, __v16sf __B, __v16sf __C,
                               __v16sf __D, __v16sf __E, __v4sf *__F)
        {
            return (__v16sf) __builtin_ia32_4fmaddps_mask ((__v16sf) __A,
                                                          (__v16sf) __B,
                                                          (__v16sf) __C,
                                                          (__v16sf) __D,
                                                          (__v16sf) __E,
                                                          (const __v4sf *) __F,
                                                          (__v16sf) __DEST,
                                                          0xffff);
        }
    } "-mavx5124fmaps" ]
}

# Return 1 if avx512_4vnniw instructions can be compiled.
proc check_effective_target_avx5124vnniw { } {
    return [check_no_compiler_messages avx5124vnniw object {
        typedef int __v16si __attribute__ ((__vector_size__ (64)));
        typedef int __v4si __attribute__ ((__vector_size__ (16)));

        __v16si
        _mm512_4dpwssd_epi32 (__v16si __A, __v16si __B, __v16si __C,
                              __v16si __D, __v16si __E, __v4si *__F)
        {
            return (__v16si) __builtin_ia32_vp4dpwssd ((__v16si) __B,
                                                       (__v16si) __C,
                                                       (__v16si) __D,
                                                       (__v16si) __E,
                                                       (__v16si) __A,
                                                       (const __v4si *) __F);
        }
    } "-mavx5124vnniw" ]
}

# Return 1 if avx512_vpopcntdq instructions can be compiled.
proc check_effective_target_avx512vpopcntdq { } {
    return [check_no_compiler_messages avx512vpopcntdq object {
        typedef int __v16si __attribute__ ((__vector_size__ (64)));

        __v16si
        _mm512_popcnt_epi32 (__v16si __A)
        {
            return (__v16si) __builtin_ia32_vpopcountd_v16si ((__v16si) __A);
        }
    } "-mavx512vpopcntdq" ]
}

# Return 1 if 128 or 256-bit avx512_vpopcntdq instructions can be compiled.
proc check_effective_target_avx512vpopcntdqvl { } {
    return [check_no_compiler_messages avx512vpopcntdqvl object {
        typedef int __v8si __attribute__ ((__vector_size__ (32)));

        __v8si
        _mm256_popcnt_epi32 (__v8si __A)
        {
            return (__v8si) __builtin_ia32_vpopcountd_v8si ((__v8si) __A);
        }
    } "-mavx512vpopcntdq -mavx512vl" ]
}

# Return 1 if gfni instructions can be compiled.
proc check_effective_target_gfni { } {
    return [check_no_compiler_messages gfni object {
        typedef char __v16qi __attribute__ ((__vector_size__ (16)));

        __v16qi
        _mm_gf2p8affineinv_epi64_epi8 (__v16qi __A, __v16qi __B, const int __C)
        {
            return (__v16qi) __builtin_ia32_vgf2p8affineinvqb_v16qi ((__v16qi) __A,
                                                                     (__v16qi) __B,
                                                                      0);
        }
    } "-mgfni" ]
}

# Return 1 if avx512vbmi2 instructions can be compiled.
proc check_effective_target_avx512vbmi2 { } {
    return [check_no_compiler_messages avx512vbmi2 object {
        typedef char __v16qi __attribute__ ((__vector_size__ (16)));
        typedef unsigned long long __mmask16;

        __v16qi
        _mm_mask_compress_epi8 (__v16qi __A, __mmask16 __B, __v16qi __C)
        {
                return (__v16qi) __builtin_ia32_compressqi128_mask((__v16qi)__C,
                                                                   (__v16qi)__A,
                                                                   (__mmask16)__B);
        }
    } "-mavx512vbmi2 -mavx512vl" ]
}

# Return 1 if avx512vbmi2 instructions can be compiled.
proc check_effective_target_avx512vnni { } {
    return [check_no_compiler_messages avx512vnni object {
        typedef int __v16si __attribute__ ((__vector_size__ (64)));

        __v16si
        _mm_mask_compress_epi8 (__v16si __A, __v16si __B, __v16si __C)
        {
                return (__v16si) __builtin_ia32_vpdpbusd_v16si ((__v16si)__A,
                                                                (__v16si)__B,
                                                                (__v16si)__C);
        }
    } "-mavx512vnni -mavx512f" ]
}

# Return 1 if vaes instructions can be compiled.
proc check_effective_target_avx512vaes { } {
    return [check_no_compiler_messages avx512vaes object {

        typedef int __v16si __attribute__ ((__vector_size__ (64)));

        __v32qi
        _mm256_aesdec_epi128 (__v32qi __A, __v32qi __B)
        {
          return (__v32qi)__builtin_ia32_vaesdec_v32qi ((__v32qi) __A, (__v32qi) __B);
        }
    } "-mvaes" ]
}

# Return 1 if vpclmulqdq instructions can be compiled.
proc check_effective_target_vpclmulqdq { } {
    return [check_no_compiler_messages vpclmulqdq object {
        typedef long long __v4di __attribute__ ((__vector_size__ (32)));

        __v4di
        _mm256_clmulepi64_epi128 (__v4di __A, __v4di __B)
        {
            return (__v4di) __builtin_ia32_vpclmulqdq_v4di (__A, __B, 0);
        }
    } "-mvpclmulqdq -mavx512vl" ]
}

# Return 1 if avx512_bitalg instructions can be compiled.
proc check_effective_target_avx512bitalg { } {
    return [check_no_compiler_messages avx512bitalg object {
        typedef short int __v32hi __attribute__ ((__vector_size__ (64)));

        __v32hi
        _mm512_popcnt_epi16 (__v32hi __A)
        {
            return (__v32hi) __builtin_ia32_vpopcountw_v32hi ((__v32hi) __A);
        }
    } "-mavx512bitalg" ]
}

# Return 1 if C wchar_t type is compatible with char16_t.

proc check_effective_target_wchar_t_char16_t_compatible { } {
    return [check_no_compiler_messages wchar_t_char16_t object {
        __WCHAR_TYPE__ wc;
        __CHAR16_TYPE__ *p16 = &wc;
        char t[(((__CHAR16_TYPE__) -1) < 0 == ((__WCHAR_TYPE__) -1) < 0) ? 1 : -1];
    }]
}

# Return 1 if C wchar_t type is compatible with char32_t.

proc check_effective_target_wchar_t_char32_t_compatible { } {
    return [check_no_compiler_messages wchar_t_char32_t object {
        __WCHAR_TYPE__ wc;
        __CHAR32_TYPE__ *p32 = &wc;
        char t[(((__CHAR32_TYPE__) -1) < 0 == ((__WCHAR_TYPE__) -1) < 0) ? 1 : -1];
    }]
}

# Return 1 if pow10 function exists.

proc check_effective_target_pow10 { } {
    return [check_runtime pow10 {
        #include <math.h>
        int main () {
        double x;
        x = pow10 (1);
        return 0;
        }
    } "-lm" ]
}

# Return 1 if frexpl function exists.

proc check_effective_target_frexpl { } {
    return [check_runtime frexpl {
        #include <math.h>
        int main () {
        long double x;
        int y;
        x = frexpl (5.0, &y);
        return 0;
        }
    } "-lm" ]
}


# Return 1 if issignaling function exists.
proc check_effective_target_issignaling {} {
    return [check_runtime issignaling {
        #define _GNU_SOURCE
        #include <math.h>
        int main ()
        {
          return issignaling (0.0);
        }
    } "-lm" ]
}

# Return 1 if current options generate DFP instructions, 0 otherwise.
proc check_effective_target_hard_dfp {} {
    return [check_no_messages_and_pattern hard_dfp "!adddd3" assembly {
        typedef float d64 __attribute__((mode(DD)));
        d64 x, y, z;
        void foo (void) { z = x + y; }
    }]
}

# Return 1 if string.h and wchar.h headers provide C++ requires overloads
# for strchr etc. functions.

proc check_effective_target_correct_iso_cpp_string_wchar_protos { } {
    return [check_no_compiler_messages correct_iso_cpp_string_wchar_protos assembly {
        #include <string.h>
        #include <wchar.h>
        #if !defined(__cplusplus) \
            || !defined(__CORRECT_ISO_CPP_STRING_H_PROTO) \
            || !defined(__CORRECT_ISO_CPP_WCHAR_H_PROTO)
        ISO C++ correct string.h and wchar.h protos not supported.
        #else
        int i;
        #endif
    }]
}

# Return 1 if GNU as is used.

proc check_effective_target_gas { } {
    global use_gas_saved
    global tool

    if {![info exists use_gas_saved]} {
        # Check if the as used by gcc is GNU as.
        set gcc_as [lindex [${tool}_target_compile "-print-prog-name=as" "" "none" ""] 0]
        # Provide /dev/null as input, otherwise gas times out reading from
        # stdin.
        set status [remote_exec host "$gcc_as" "-v /dev/null"]
        set as_output [lindex $status 1]
        if { [ string first "GNU" $as_output ] >= 0 } {
            set use_gas_saved 1
        } else {
            set use_gas_saved 0
        }
    }
    return $use_gas_saved
}

# Return 1 if GNU ld is used.

proc check_effective_target_gld { } {
    global use_gld_saved
    global tool

    if {![info exists use_gld_saved]} {
        # Check if the ld used by gcc is GNU ld.
        set gcc_ld [lindex [${tool}_target_compile "-print-prog-name=ld" "" "none" ""] 0]
        set status [remote_exec host "$gcc_ld" "--version"]
        set ld_output [lindex $status 1]
        if { [ string first "GNU" $ld_output ] >= 0 } {
            set use_gld_saved 1
        } else {
            set use_gld_saved 0
        }
    }
    return $use_gld_saved
}

# Return 1 if the compiler has been configure with link-time optimization
# (LTO) support.

proc check_effective_target_lto { } {
    if { [istarget nvptx-*-*] } {
        return 0;
    }
    return [check_no_compiler_messages lto object {
        void foo (void) { }
    } "-flto"]
}

# Return 1 if the compiler and linker support incremental link-time
# optimization.

proc check_effective_target_lto_incremental { } {
    if ![check_effective_target_lto] {
        return 0
    }
    return [check_no_compiler_messages lto_incremental executable {
        int main () { return 0; }
    } "-flto -r -nostdlib"]
}

# Return 1 if -mx32 -maddress-mode=short can compile, 0 otherwise.

proc check_effective_target_maybe_x32 { } {
    return [check_no_compiler_messages maybe_x32 object {
        void foo (void) {}
    } "-mx32 -maddress-mode=short"]
}

# Return 1 if this target supports the -fsplit-stack option, 0
# otherwise.

proc check_effective_target_split_stack {} {
    return [check_no_compiler_messages split_stack object {
        void foo (void) { }
    } "-fsplit-stack"]
}

# Return 1 if this target supports the -masm=intel option, 0
# otherwise

proc check_effective_target_masm_intel  {} {
    return [check_no_compiler_messages masm_intel object {
        extern void abort (void);
    } "-masm=intel"]
}

# Return 1 if the language for the compiler under test is C.

proc check_effective_target_c { } {
    global tool
    if [string match $tool "gcc"] {
        return 1
    }
 return 0
}

# Return 1 if the language for the compiler under test is C++.

proc check_effective_target_c++ { } {
    global tool
    if { [string match $tool "g++"] || [string match $tool "libstdc++"] } {
        return 1
    }
 return 0
}

set cxx_default "c++14"
# Check whether the current active language standard supports the features
# of C++11/C++14 by checking for the presence of one of the -std flags.
# This assumes that the default for the compiler is $cxx_default, and that
# there will never be multiple -std= arguments on the command line.
proc check_effective_target_c++11_only { } {
    global cxx_default
    if ![check_effective_target_c++] {
        return 0
    }
    if [check-flags { { } { } { -std=c++0x -std=gnu++0x -std=c++11 -std=gnu++11 } }] {
        return 1
    }
    if { $cxx_default == "c++11" && [check-flags { { } { } { } { -std=* } }] } {
        return 1
    }
    return 0
}
proc check_effective_target_c++11 { } {
    if [check_effective_target_c++11_only] {
        return 1
    }
    return [check_effective_target_c++14]
}
proc check_effective_target_c++11_down { } {
    if ![check_effective_target_c++] {
        return 0
    }
    return [expr ![check_effective_target_c++14] ]
}

proc check_effective_target_c++14_only { } {
    global cxx_default
    if ![check_effective_target_c++] {
        return 0
    }
    if [check-flags { { } { } { -std=c++14 -std=gnu++14 -std=c++14 -std=gnu++14 } }] {
        return 1
    }
    if { $cxx_default == "c++14" && [check-flags { { } { } { } { -std=* } }] } {
        return 1
    }
    return 0
}

proc check_effective_target_c++14 { } {
    if [check_effective_target_c++14_only] {
        return 1
    }
    return [check_effective_target_c++17]
}
proc check_effective_target_c++14_down { } {
    if ![check_effective_target_c++] {
        return 0
    }
    return [expr ![check_effective_target_c++17] ]
}

proc check_effective_target_c++98_only { } {
    global cxx_default
    if ![check_effective_target_c++] {
        return 0
    }
    if [check-flags { { } { } { -std=c++98 -std=gnu++98 -std=c++03 -std=gnu++03 } }] {
        return 1
    }
    if { $cxx_default == "c++98" && [check-flags { { } { } { } { -std=* } }] } {
        return 1
    }
    return 0
}

proc check_effective_target_c++17_only { } {
    global cxx_default
    if ![check_effective_target_c++] {
        return 0
    }
    if [check-flags { { } { } { -std=c++17 -std=gnu++17 -std=c++1z -std=gnu++1z } }] {
        return 1
    }
    if { $cxx_default == "c++17" && [check-flags { { } { } { } { -std=* } }] } {
        return 1
    }
    return 0
}

proc check_effective_target_c++17 { } {
    if [check_effective_target_c++17_only] {
        return 1
    }
    return [check_effective_target_c++2a]
}
proc check_effective_target_c++17_down { } {
    if ![check_effective_target_c++] {
        return 0
    }
    return [expr ![check_effective_target_c++2a] ]
}

proc check_effective_target_c++2a_only { } {
    global cxx_default
    if ![check_effective_target_c++] {
        return 0
    }
    if [check-flags { { } { } { -std=c++2a -std=gnu++2a } }] {
        return 1
    }
    if { $cxx_default == "c++20" && [check-flags { { } { } { } { -std=* } }] } {
        return 1
    }
    return 0
}
proc check_effective_target_c++2a { } {
    return [check_effective_target_c++2a_only]
}

# Check for C++ Concepts TS support, i.e. -fconcepts flag.
proc check_effective_target_concepts { } {
    return [check-flags { "" { } { -fconcepts } }]
}

# Return 1 if expensive testcases should be run.

proc check_effective_target_run_expensive_tests { } {
    if { [getenv GCC_TEST_RUN_EXPENSIVE] != "" } {
        return 1
    }
    return 0
}

# Returns 1 if "mempcpy" is available on the target system.

proc check_effective_target_mempcpy {} {
    return [check_function_available "mempcpy"]
}

# Returns 1 if "stpcpy" is available on the target system.

proc check_effective_target_stpcpy {} {
    return [check_function_available "stpcpy"]
}

# Check whether the vectorizer tests are supported by the target and
# append additional target-dependent compile flags to DEFAULT_VECTCFLAGS.
# If a port wants to execute the tests more than once it should append
# the supported target to EFFECTIVE_TARGETS instead, and the compile flags
# will be added by a call to add_options_for_<target>.
# Set dg-do-what-default to either compile or run, depending on target
# capabilities.  Do not set this if the supported target is appended to
# EFFECTIVE_TARGETS.  Flags and this variable will be set by et-dg-runtest
# automatically.  Return the number of effective targets if vectorizer tests
# are supported, 0 otherwise.

proc check_vect_support_and_set_flags { } {
    global DEFAULT_VECTCFLAGS
    global dg-do-what-default
    global EFFECTIVE_TARGETS

    if  [istarget powerpc-*paired*]  {
        lappend DEFAULT_VECTCFLAGS "-mpaired"
        if [check_750cl_hw_available] {
            set dg-do-what-default run
        } else {
            set dg-do-what-default compile
        }
    } elseif [istarget powerpc*-*-*] {
        # Skip targets not supporting -maltivec.
        if ![is-effective-target powerpc_altivec_ok] {
            return 0
        }

        lappend DEFAULT_VECTCFLAGS "-maltivec"
        if [check_p9vector_hw_available] {
            lappend DEFAULT_VECTCFLAGS "-mpower9-vector"
        } elseif [check_p8vector_hw_available] {
            lappend DEFAULT_VECTCFLAGS "-mpower8-vector"
        } elseif [check_vsx_hw_available] {
            lappend DEFAULT_VECTCFLAGS "-mvsx" "-mno-allow-movmisalign"
        }

        if [check_vmx_hw_available] {
            set dg-do-what-default run
        } else {
            if [is-effective-target ilp32] {
                # Specify a cpu that supports VMX for compile-only tests.
                lappend DEFAULT_VECTCFLAGS "-mcpu=970"
            }
            set dg-do-what-default compile
        }
    } elseif { [istarget spu-*-*] } {
        set dg-do-what-default run
    } elseif { [istarget i?86-*-*] || [istarget x86_64-*-*] } {
        lappend DEFAULT_VECTCFLAGS "-msse2"
        if { [check_effective_target_sse2_runtime] } {
            set dg-do-what-default run
        } else {
            set dg-do-what-default compile
        }
    } elseif { [istarget mips*-*-*]
               && [check_effective_target_nomips16] } {
        if { [check_effective_target_mpaired_single] } {
            lappend EFFECTIVE_TARGETS mpaired_single
        }
        if { [check_effective_target_mips_loongson_mmi] } {
            lappend EFFECTIVE_TARGETS mips_loongson_mmi
        }
        if { [check_effective_target_mips_msa] } {
            lappend EFFECTIVE_TARGETS mips_msa
        }
        return [llength $EFFECTIVE_TARGETS]
    } elseif [istarget sparc*-*-*] {
        lappend DEFAULT_VECTCFLAGS "-mcpu=ultrasparc" "-mvis"
        if [check_effective_target_ultrasparc_hw] {
            set dg-do-what-default run
        } else {
            set dg-do-what-default compile
        }
    } elseif [istarget alpha*-*-*] {
        # Alpha's vectorization capabilities are extremely limited.
        # It's more effort than its worth disabling all of the tests
        # that it cannot pass.  But if you actually want to see what
        # does work, command out the return.
        return 0

        lappend DEFAULT_VECTCFLAGS "-mmax"
        if [check_alpha_max_hw_available] {
            set dg-do-what-default run
        } else {
            set dg-do-what-default compile
        }
    } elseif [istarget ia64-*-*] {
        set dg-do-what-default run
    } elseif [is-effective-target arm_neon_ok] {
        eval lappend DEFAULT_VECTCFLAGS [add_options_for_arm_neon ""]
        # NEON does not support denormals, so is not used for vectorization by
        # default to avoid loss of precision.  We must pass -ffast-math to test
        # vectorization of float operations.
        lappend DEFAULT_VECTCFLAGS "-ffast-math"
        if [is-effective-target arm_neon_hw] {
            set dg-do-what-default run
        } else {
            set dg-do-what-default compile
        }
    } elseif [istarget "aarch64*-*-*"] {
        set dg-do-what-default run
    } elseif [istarget s390*-*-*] {
        # The S/390 backend set a default of 2 for that value.
        # Override it to have the same situation as with other
        # targets.
        lappend DEFAULT_VECTCFLAGS "--param" "min-vect-loop-bound=1"
        lappend DEFAULT_VECTCFLAGS "--param" "max-unrolled-insns=200"
        lappend DEFAULT_VECTCFLAGS "--param" "max-unroll-times=8"
        lappend DEFAULT_VECTCFLAGS "--param" "max-completely-peeled-insns=200"
        lappend DEFAULT_VECTCFLAGS "--param" "max-completely-peel-times=16"
        if [check_effective_target_s390_vxe] {
            lappend DEFAULT_VECTCFLAGS "-march=z14" "-mzarch"
            set dg-do-what-default run
        } elseif [check_effective_target_s390_vx] {
            lappend DEFAULT_VECTCFLAGS "-march=z13" "-mzarch"
            set dg-do-what-default run
        } else {
            lappend DEFAULT_VECTCFLAGS "-march=z14" "-mzarch"
            set dg-do-what-default compile
        }
    } else {
        return 0
    }

    return 1
}

# Return 1 if the target does *not* require strict alignment.

proc check_effective_target_non_strict_align {} {

    # On ARM, the default is to use STRICT_ALIGNMENT, but there
    # are interfaces defined for misaligned access and thus
    # depending on the architecture levels unaligned access is
    # available.
    if [istarget "arm*-*-*"] {
        return [check_effective_target_arm_unaligned]
    }

    return [check_no_compiler_messages non_strict_align assembly {
        char *y;
        typedef char __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) c;
        c *z;
        void foo(void) { z = (c *) y; }
    } "-Wcast-align"]
}

# Return 1 if the target has <ucontext.h>.

proc check_effective_target_ucontext_h { } {
    return [check_no_compiler_messages ucontext_h assembly {
        #include <ucontext.h>
    }]
}

proc check_effective_target_aarch64_tiny { } {
    if { [istarget aarch64*-*-*] } {
        return [check_no_compiler_messages aarch64_tiny object {
            #ifdef __AARCH64_CMODEL_TINY__
            int dummy;
            #else
            #error target not AArch64 tiny code model
            #endif
        }]
    } else {
        return 0
    }
}

# Create functions to check that the AArch64 assembler supports the
# various architecture extensions via the .arch_extension pseudo-op.

foreach { aarch64_ext } { "fp" "simd" "crypto" "crc" "lse" "dotprod" "sve"} {
    eval [string map [list FUNC $aarch64_ext] {
        proc check_effective_target_aarch64_asm_FUNC_ok { } {
          if { [istarget aarch64*-*-*] } {
                return [check_no_compiler_messages aarch64_FUNC_assembler object {
                        __asm__ (".arch_extension FUNC");
                } "-march=armv8-a+FUNC"]
          } else {
                return 0
          }
        }
    }]
}

proc check_effective_target_aarch64_small { } {
    if { [istarget aarch64*-*-*] } {
        return [check_no_compiler_messages aarch64_small object {
            #ifdef __AARCH64_CMODEL_SMALL__
            int dummy;
            #else
            #error target not AArch64 small code model
            #endif
        }]
    } else {
        return 0
    }
}

proc check_effective_target_aarch64_large { } {
    if { [istarget aarch64*-*-*] } {
        return [check_no_compiler_messages aarch64_large object {
            #ifdef __AARCH64_CMODEL_LARGE__
            int dummy;
            #else
            #error target not AArch64 large code model
            #endif
        }]
    } else {
        return 0
    }
}


# Return 1 if this is a reduced AVR Tiny core.  Such cores have different
# register set, instruction set, addressing capabilities and ABI.

proc check_effective_target_avr_tiny { } {
    if { [istarget avr*-*-*] } {
        return [check_no_compiler_messages avr_tiny object {
            #ifdef __AVR_TINY__
            int dummy;
            #else
            #error target not a reduced AVR Tiny core
            #endif
        }]
    } else {
        return 0
    }
}

# Return 1 if <fenv.h> is available with all the standard IEEE
# exceptions and floating-point exceptions are raised by arithmetic
# operations.  (If the target requires special options for "inexact"
# exceptions, those need to be specified in the testcases.)

proc check_effective_target_fenv_exceptions {} {
    return [check_runtime fenv_exceptions {
        #include <fenv.h>
        #include <stdlib.h>
        #ifndef FE_DIVBYZERO
        # error Missing FE_DIVBYZERO
        #endif
        #ifndef FE_INEXACT
        # error Missing FE_INEXACT
        #endif
        #ifndef FE_INVALID
        # error Missing FE_INVALID
        #endif
        #ifndef FE_OVERFLOW
        # error Missing FE_OVERFLOW
        #endif
        #ifndef FE_UNDERFLOW
        # error Missing FE_UNDERFLOW
        #endif
        volatile float a = 0.0f, r;
        int
        main (void)
        {
          r = a / a;
          if (fetestexcept (FE_INVALID))
            exit (0);
          else
            abort ();
        }
    } [add_options_for_ieee "-std=gnu99"]]
}

proc check_effective_target_tiny {} {
    return [check_cached_effective_target tiny {
      if { [istarget aarch64*-*-*]
                 && [check_effective_target_aarch64_tiny] } {
           return 1
      }
      if { [istarget avr-*-*]
            && [check_effective_target_avr_tiny] } {
           return 1
      }
      return 0
    }]
}

# Return 1 if the target supports -mbranch-cost=N option.

proc check_effective_target_branch_cost {} {
    if { [   istarget arm*-*-*]
         || [istarget avr*-*-*]
         || [istarget csky*-*-*]
         || [istarget epiphany*-*-*]
         || [istarget frv*-*-*]
         || [istarget i?86-*-*] || [istarget x86_64-*-*]
         || [istarget mips*-*-*]
         || [istarget s390*-*-*]
         || [istarget riscv*-*-*]
         || [istarget sh*-*-*]
         || [istarget spu*-*-*] } {
        return 1
    }
    return 0
}

# Record that dg-final test TEST requires convential compilation.

proc force_conventional_output_for { test } {
    if { [info proc $test] == "" } {
        perror "$test does not exist"
        exit 1
    }
    proc ${test}_required_options {} {
        global gcc_force_conventional_output
        upvar 1 extra_tool_flags extra_tool_flags
        if {[regexp -- "^scan-assembler" [info level 0]]
            && ![string match "*-fident*" $extra_tool_flags]} {
            # Do not let .ident confuse assembler scan tests
            return [list $gcc_force_conventional_output "-fno-ident"]
        }
        return $gcc_force_conventional_output
    }
}

# Record that dg-final test scan-ltrans-tree-dump* requires -flto-partition=one
# in order to force a single partition, allowing scan-ltrans-tree-dump* to scan
# a dump file *.exe.ltrans0.*.

proc scan-ltrans-tree-dump_required_options {} {
    return "-flto-partition=one"
}
proc scan-ltrans-tree-dump-times_required_options {} {
    return "-flto-partition=one"
}
proc scan-ltrans-tree-dump-not_required_options {} {
    return "-flto-partition=one"
}
proc scan-ltrans-tree-dump-dem_required_options {} {
    return "-flto-partition=one"
}
proc scan-ltrans-tree-dump-dem-not_required_options {} {
    return "-flto-partition=one"
}

# Return 1 if the x86-64 target supports PIE with copy reloc, 0
# otherwise.  Cache the result.

proc check_effective_target_pie_copyreloc { } {
    global tool
    global GCC_UNDER_TEST

    if { !([istarget i?86-*-*] || [istarget x86_64-*-*]) } {
        return 0
    }

    # Need auto-host.h to check linker support.
    if { ![file exists ../../auto-host.h ] } {
        return 0
    }

    return [check_cached_effective_target pie_copyreloc {
        # Set up and compile to see if linker supports PIE with copy
        # reloc.  Include the current process ID in the file names to
        # prevent conflicts with invocations for multiple testsuites.

        set src pie[pid].c
        set obj pie[pid].o

        set f [open $src "w"]
        puts $f "#include \"../../auto-host.h\""
        puts $f "#if HAVE_LD_PIE_COPYRELOC == 0"
        puts $f "# error Linker does not support PIE with copy reloc."
        puts $f "#endif"
        close $f

        verbose "check_effective_target_pie_copyreloc compiling testfile $src" 2
        set lines [${tool}_target_compile $src $obj object ""]

        file delete $src
        file delete $obj

        if [string match "" $lines] then {
            verbose "check_effective_target_pie_copyreloc testfile compilation passed" 2
            return 1
        } else {
            verbose "check_effective_target_pie_copyreloc testfile compilation failed" 2
            return 0
        }
    }]
}

# Return 1 if the x86 target supports R_386_GOT32X relocation, 0
# otherwise.  Cache the result.

proc check_effective_target_got32x_reloc { } {
    global tool
    global GCC_UNDER_TEST

    if { !([istarget i?86-*-*] || [istarget x86_64-*-*]) } {
        return 0
    }

    # Need auto-host.h to check linker support.
    if { ![file exists ../../auto-host.h ] } {
        return 0
    }

    return [check_cached_effective_target got32x_reloc {
        # Include the current process ID in the file names to prevent
        # conflicts with invocations for multiple testsuites.

        set src got32x[pid].c
        set obj got32x[pid].o

        set f [open $src "w"]
        puts $f "#include \"../../auto-host.h\""
        puts $f "#if HAVE_AS_IX86_GOT32X == 0"
        puts $f "# error Assembler does not support R_386_GOT32X."
        puts $f "#endif"
        close $f

        verbose "check_effective_target_got32x_reloc compiling testfile $src" 2
        set lines [${tool}_target_compile $src $obj object ""]

        file delete $src
        file delete $obj

        if [string match "" $lines] then {
            verbose "check_effective_target_got32x_reloc testfile compilation passed" 2
            return 1
        } else {
            verbose "check_effective_target_got32x_reloc testfile compilation failed" 2
            return 0
        }
    }]

    return $got32x_reloc_available_saved
}

# Return 1 if the x86 target supports calling ___tls_get_addr via GOT,
# 0 otherwise.  Cache the result.

proc check_effective_target_tls_get_addr_via_got { } {
    global tool
    global GCC_UNDER_TEST

    if { !([istarget i?86-*-*] || [istarget x86_64-*-*]) } {
        return 0
    }

    # Need auto-host.h to check linker support.
    if { ![file exists ../../auto-host.h ] } {
        return 0
    }

    return [check_cached_effective_target tls_get_addr_via_got {
        # Include the current process ID in the file names to prevent
        # conflicts with invocations for multiple testsuites.

        set src tls_get_addr_via_got[pid].c
        set obj tls_get_addr_via_got[pid].o

        set f [open $src "w"]
        puts $f "#include \"../../auto-host.h\""
        puts $f "#if HAVE_AS_IX86_TLS_GET_ADDR_GOT == 0"
        puts $f "# error Assembler/linker do not support calling ___tls_get_addr via GOT."
        puts $f "#endif"
        close $f

        verbose "check_effective_target_tls_get_addr_via_got compiling testfile $src" 2
        set lines [${tool}_target_compile $src $obj object ""]

        file delete $src
        file delete $obj

        if [string match "" $lines] then {
            verbose "check_effective_target_tls_get_addr_via_got testfile compilation passed" 2
            return 1
        } else {
            verbose "check_effective_target_tls_get_addr_via_got testfile compilation failed" 2
            return 0
        }
    }]
}

# Return 1 if the target uses comdat groups.

proc check_effective_target_comdat_group {} {
    return [check_no_messages_and_pattern comdat_group "\.section\[^\n\r]*,comdat|\.group\[^\n\r]*,#comdat" assembly {
        // C++
        inline int foo () { return 1; }
        int (*fn) () = foo;
    }]
}

# Return 1 if target supports __builtin_eh_return
proc check_effective_target_builtin_eh_return { } {
    return [check_no_compiler_messages builtin_eh_return object {
        void test (long l, void *p)
        {
            __builtin_eh_return (l, p);
        }
    } "" ]
}

# Return 1 if the target supports max reduction for vectors.

proc check_effective_target_vect_max_reduc { } {
    if { [istarget aarch64*-*-*] || [is-effective-target arm_neon] } {
        return 1
    }
    return 0
}

# Return 1 if there is an nvptx offload compiler.

proc check_effective_target_offload_nvptx { } {
    return [check_no_compiler_messages offload_nvptx object {
        int main () {return 0;}
    } "-foffload=nvptx-none" ]
}

# Return 1 if the compiler has been configured with hsa offloading.

proc check_effective_target_offload_hsa { } {
    return [check_no_compiler_messages offload_hsa assembly {
        int main () {return 0;}
    } "-foffload=hsa" ]
}

# Return 1 if the target support -fprofile-update=atomic
proc check_effective_target_profile_update_atomic {} {
    return [check_no_compiler_messages profile_update_atomic assembly {
        int main (void) { return 0; }
    } "-fprofile-update=atomic -fprofile-generate"]
}

# Return 1 if vector (va - vector add) instructions are understood by
# the assembler and can be executed.  This also covers checking for
# the VX kernel feature.  A kernel without that feature does not
# enable the vector facility and the following check will die with a
# signal.
proc check_effective_target_s390_vx { } {
    if ![istarget s390*-*-*] then {
        return 0;
    }

    return [check_runtime s390_check_vx {
        int main (void)
        {
            asm ("va %%v24, %%v26, %%v28, 3" : : : "v24", "v26", "v28");
            return 0;
        }
    } "-march=z13 -mzarch" ]
}

# Same as above but for the z14 vector enhancement facility. Test
# is performed with the vector nand instruction.
proc check_effective_target_s390_vxe { } {
    if ![istarget s390*-*-*] then {
        return 0;
    }

    return [check_runtime s390_check_vxe {
        int main (void)
        {
            asm ("vnn %%v24, %%v26, %%v28" : : : "v24", "v26", "v28");
            return 0;
        }
    } "-march=z14 -mzarch" ]
}

#For versions of ARM architectures that have hardware div insn,
#disable the divmod transform

proc check_effective_target_arm_divmod_simode { } {
    return [check_no_compiler_messages arm_divmod assembly {
        #ifdef __ARM_ARCH_EXT_IDIV__
        #error has div insn
        #endif
        int i;
    }]
}

# Return 1 if target supports divmod hardware insn or divmod libcall.

proc check_effective_target_divmod { } {
    #TODO: Add checks for all targets that have either hardware divmod insn
    # or define libfunc for divmod.
    if { [istarget arm*-*-*]
         || [istarget i?86-*-*] || [istarget x86_64-*-*] } {
        return 1
    }
    return 0
}

# Return 1 if target supports divmod for SImode. The reason for
# separating this from check_effective_target_divmod is that
# some versions of ARM architecture define div instruction
# only for simode, and for these archs, we do not want to enable
# divmod transform for simode.

proc check_effective_target_divmod_simode { } {
    if { [istarget arm*-*-*] } {
        return [check_effective_target_arm_divmod_simode]
    }

    return [check_effective_target_divmod]
}

# Return 1 if store merging optimization is applicable for target.
# Store merging is not profitable for targets like the avr which
# can load/store only one byte at a time. Use int size as a proxy
# for the number of bytes the target can write, and skip for targets
# with a smallish (< 32) size.

proc check_effective_target_store_merge { } {
    if { [is-effective-target non_strict_align ] && [is-effective-target int32plus] } {
        return 1
    }

    return 0
}

# Return 1 if we're able to assemble rdrand

proc check_effective_target_rdrand { } {
    return [check_no_compiler_messages_nocache rdrand object {
        unsigned int
        __foo(void)
        {
            unsigned int val;
            __builtin_ia32_rdrand32_step(&val);
            return val;
        }
    } "-mrdrnd" ]
}

# Return 1 if the target supports coprocessor instructions: cdp, ldc, ldcl,
# stc, stcl, mcr and mrc.
proc check_effective_target_arm_coproc1_ok_nocache { } {
    if { ![istarget arm*-*-*] } {
        return 0
    }
    return [check_no_compiler_messages_nocache arm_coproc1_ok assembly {
        #if (__thumb__ && !__thumb2__) || __ARM_ARCH < 4
        #error FOO
        #endif
    }]
}

proc check_effective_target_arm_coproc1_ok { } {
    return [check_cached_effective_target arm_coproc1_ok \
                check_effective_target_arm_coproc1_ok_nocache]
}

# Return 1 if the target supports all coprocessor instructions checked by
# check_effective_target_arm_coproc1_ok in addition to the following: cdp2,
# ldc2, ldc2l, stc2, stc2l, mcr2 and mrc2.
proc check_effective_target_arm_coproc2_ok_nocache { } {
    if { ![check_effective_target_arm_coproc1_ok] } {
        return 0
    }
    return [check_no_compiler_messages_nocache arm_coproc2_ok assembly {
        #if (__thumb__ && !__thumb2__) || __ARM_ARCH < 5
        #error FOO
        #endif
    }]
}

proc check_effective_target_arm_coproc2_ok { } {
    return [check_cached_effective_target arm_coproc2_ok \
                check_effective_target_arm_coproc2_ok_nocache]
}

# Return 1 if the target supports all coprocessor instructions checked by
# check_effective_target_arm_coproc2_ok in addition the following: mcrr and
# mrrc.
proc check_effective_target_arm_coproc3_ok_nocache { } {
    if { ![check_effective_target_arm_coproc2_ok] } {
        return 0
    }
    return [check_no_compiler_messages_nocache arm_coproc3_ok assembly {
        #if (__thumb__ && !__thumb2__) \
            || (__ARM_ARCH < 6 && !defined (__ARM_ARCH_5TE__))
        #error FOO
        #endif
    }]
}

proc check_effective_target_arm_coproc3_ok { } {
    return [check_cached_effective_target arm_coproc3_ok \
                check_effective_target_arm_coproc3_ok_nocache]
}

# Return 1 if the target supports all coprocessor instructions checked by
# check_effective_target_arm_coproc3_ok in addition the following: mcrr2 and
# mrcc2.
proc check_effective_target_arm_coproc4_ok_nocache { } {
    if { ![check_effective_target_arm_coproc3_ok] } {
        return 0
    }
    return [check_no_compiler_messages_nocache arm_coproc4_ok assembly {
        #if (__thumb__ && !__thumb2__) || __ARM_ARCH < 6
        #error FOO
        #endif
    }]
}

proc check_effective_target_arm_coproc4_ok { } {
    return [check_cached_effective_target arm_coproc4_ok \
                check_effective_target_arm_coproc4_ok_nocache]
}

# Return 1 if the target supports the auto_inc_dec optimization pass.
proc check_effective_target_autoincdec { } {
    if { ![check_no_compiler_messages auto_incdec assembly { void f () { }
         } "-O2 -fdump-rtl-auto_inc_dec" ] } {
      return 0
    }

    set dumpfile [glob -nocomplain "auto_incdec[pid].c.\[0-9\]\[0-9\]\[0-9\]r.auto_inc_dec"]
    if { [file exists $dumpfile ] } {
        file delete $dumpfile
        return 1
    }
    return 0
}

# Return 1 if the target has support for stack probing designed
# to avoid stack-clash style attacks.
#
# This is used to restrict the stack-clash mitigation tests to
# just those targets that have been explicitly supported.
# 
# In addition to the prologue work on those targets, each target's
# properties should be described in the functions below so that
# tests do not become a mess of unreadable target conditions.
# 
proc check_effective_target_supports_stack_clash_protection { } {

    if { [istarget x86_64-*-*] || [istarget i?86-*-*] 
          || [istarget powerpc*-*-*] || [istarget rs6000*-*-*]
          || [istarget aarch64*-**] || [istarget s390*-*-*] } {
        return 1
    }
  return 0
}

# Return 1 if the target creates a frame pointer for non-leaf functions
# Note we ignore cases where we apply tail call optimization here.
proc check_effective_target_frame_pointer_for_non_leaf { } {
  # Solaris/x86 defaults to -fno-omit-frame-pointer.
  if { [istarget i?86-*-solaris*] || [istarget x86_64-*-solaris*] } {
    return 1
  }

  return 0
}

# Return 1 if the target's calling sequence or its ABI
# create implicit stack probes at or prior to function entry.
proc check_effective_target_caller_implicit_probes { } {

  # On x86/x86_64 the call instruction itself pushes the return
  # address onto the stack.  That is an implicit probe of *sp.
  if { [istarget x86_64-*-*] || [istarget i?86-*-*] } {
        return 1
  }

  # On PPC, the ABI mandates that the address of the outer
  # frame be stored at *sp.  Thus each allocation of stack
  # space is itself an implicit probe of *sp.
  if { [istarget powerpc*-*-*] || [istarget rs6000*-*-*] } {
        return 1
  }

  # s390's ABI has a register save area allocated by the
  # caller for use by the callee.  The mere existence does
  # not constitute a probe by the caller, but when the slots
  # used by the callee those stores are implicit probes.
  if { [istarget s390*-*-*] } {
        return 1
  }

  # Not strictly true on aarch64, but we have agreed that we will
  # consider any function that pushes SP more than 3kbytes into
  # the guard page as broken.  This essentially means that we can
  # consider the aarch64 as having a caller implicit probe at
  # *(sp + 1k).
  if { [istarget aarch64*-*-*] } {
        return 1;
  }

  return 0
}

# Targets that potentially realign the stack pointer often cause residual
# stack allocations and make it difficult to elimination loops or residual
# allocations for dynamic stack allocations
proc check_effective_target_callee_realigns_stack { } {
  if { [istarget x86_64-*-*] || [istarget i?86-*-*] } {
        return 1
  }
  return 0
}

# Return 1 if CET instructions can be compiled.
proc check_effective_target_cet { } {
    if { !([istarget i?86-*-*] || [istarget x86_64-*-*]) } {
        return 0
    }
    return [check_no_compiler_messages cet object {
        void foo (void)
        {
          asm ("setssbsy");
        }
    } "-O2" ]
}

# Return 1 if target supports floating point "infinite"
proc check_effective_target_inf { } {
    return [check_no_compiler_messages supports_inf assembly {
        const double pinf = __builtin_inf ();
    }]
}