[Ada] Reduce use of primary stack on string concatenation

gcc/ada/

* exp_ch4.adb (Expand_Concatenate): Allocate result of string
concatenation on secondary stack when relevant.

[Ada] Spurious visibility error on Declare_Expression with renames

gcc/ada/

* sem_res.adb (Resolve_Declare_Expression): Retrieve the created
block entity that is the scope of the local declarations, from
either a local object declaration or an object renaming
declaration. The block entity does not have an explicit
declaration, but appears as the scope of all locally declared
objects.

[Ada] Use new Max_Integer_Size attribute in system.ads files

gcc/ada/

* libgnat/system-aix.ads: Likewise.
* libgnat/system-darwin-arm.ads: Likewise.
* libgnat/system-darwin-ppc.ads: Likewise.
* libgnat/system-darwin-x86.ads: Likewise.
* libgnat/system-djgpp.ads: Likewise.
* libgnat/system-dragonfly-x86_64.ads: Likewise.
* libgnat/system-freebsd.ads: Likewise.
* libgnat/system-hpux-ia64.ads: Likewise.
* libgnat/system-hpux.ads: Likewise.
* libgnat/system-linux-alpha.ads: Likewise.
* libgnat/system-linux-arm.ads: Likewise.
* libgnat/system-linux-hppa.ads: Likewise.
* libgnat/system-linux-ia64.ads: Likewise.
* libgnat/system-linux-m68k.ads: Likewise.
* libgnat/system-linux-mips.ads: Likewise.
* libgnat/system-linux-ppc.ads: Likewise.
* libgnat/system-linux-riscv.ads: Likewise.
* libgnat/system-linux-s390.ads: Likewise.
* libgnat/system-linux-sh4.ads: Likewise.
* libgnat/system-linux-sparc.ads: Likewise.
* libgnat/system-linux-x86.ads: Likewise.
* libgnat/system-lynxos178-ppc.ads: Likewise.
* libgnat/system-lynxos178-x86.ads: Likewise.
* libgnat/system-mingw.ads: Likewise.
* libgnat/system-qnx-aarch64.ads: Likewise.
* libgnat/system-rtems.ads: Likewise.
* libgnat/system-solaris-sparc.ads: Likewise.
* libgnat/system-solaris-x86.ads: Likewise.
* libgnat/system-vxworks-arm-rtp-smp.ads: Likewise.
* libgnat/system-vxworks-arm-rtp.ads: Likewise.
* libgnat/system-vxworks-arm.ads: Likewise.
* libgnat/system-vxworks-e500-kernel.ads: Likewise.
* libgnat/system-vxworks-e500-rtp-smp.ads: Likewise.
* libgnat/system-vxworks-e500-rtp.ads: Likewise.
* libgnat/system-vxworks-e500-vthread.ads: Likewise.
* libgnat/system-vxworks-ppc-kernel.ads: Likewise.
* libgnat/system-vxworks-ppc-ravenscar.ads: Likewise.
* libgnat/system-vxworks-ppc-rtp-smp.ads: Likewise.
* libgnat/system-vxworks-ppc-rtp.ads: Likewise.
* libgnat/system-vxworks-ppc-vthread.ads: Likewise.
* libgnat/system-vxworks-ppc.ads: Likewise.
* libgnat/system-vxworks-x86-kernel.ads: Likewise.
* libgnat/system-vxworks-x86-rtp-smp.ads: Likewise.
* libgnat/system-vxworks-x86-rtp.ads: Likewise.
* libgnat/system-vxworks-x86-vthread.ads: Likewise.
* libgnat/system-vxworks-x86.ads: Likewise.
* libgnat/system-vxworks7-aarch64-rtp-smp.ads: Likewise.
* libgnat/system-vxworks7-aarch64.ads: Likewise.
* libgnat/system-vxworks7-arm-rtp-smp.ads: Likewise.
* libgnat/system-vxworks7-arm.ads: Likewise.
* libgnat/system-vxworks7-e500-kernel.ads: Likewise.
* libgnat/system-vxworks7-e500-rtp-smp.ads: Likewise.
* libgnat/system-vxworks7-e500-rtp.ads: Likewise.
* libgnat/system-vxworks7-ppc-kernel.ads: Likewise.
* libgnat/system-vxworks7-ppc-rtp-smp.ads: Likewise.
* libgnat/system-vxworks7-ppc-rtp.ads: Likewise.
* libgnat/system-vxworks7-ppc64-kernel.ads: Likewise.
* libgnat/system-vxworks7-ppc64-rtp-smp.ads: Likewise.
* libgnat/system-vxworks7-x86-kernel.ads: Likewise.
* libgnat/system-vxworks7-x86-rtp-smp.ads: Likewise.
* libgnat/system-vxworks7-x86-rtp.ads: Likewise.
* libgnat/system-vxworks7-x86_64-kernel.ads: Likewise.
* libgnat/system-vxworks7-x86_64-rtp-smp.ads: Likewise.

[Ada] Remove support for -gnatP and pragma Polling

gcc/ada/

* Makefile.rtl, gnat1drv.adb, expander.adb
doc/gnat_rm/implementation_defined_pragmas.rst,
doc/gnat_ugn/building_executable_programs_with_gnat.rst,
doc/gnat_ugn/the_gnat_compilation_model.rst, exp_ch5.ads,
exp_ch5.adb, exp_ch6.adb, exp_ch7.adb, exp_util.adb,
exp_util.ads, libgnarl/s-osinte__aix.adb,
libgnarl/s-osinte__android.adb, libgnarl/s-osinte__darwin.adb,
libgnarl/s-osinte__gnu.adb, libgnarl/s-osinte__hpux-dce.adb,
libgnarl/s-osinte__lynxos178.adb, libgnarl/s-osinte__posix.adb,
libgnarl/s-osinte__qnx.adb, libgnarl/s-osinte__rtems.adb,
libgnarl/s-osinte__solaris.adb, libgnarl/s-osinte__vxworks.adb,
libgnarl/s-osinte__x32.adb, libgnarl/s-solita.adb,
libgnarl/s-taasde.adb, libgnarl/s-taprob.adb,
libgnarl/s-taprop__dummy.adb, libgnarl/s-taprop__hpux-dce.adb,
libgnarl/s-taprop__linux.adb, libgnarl/s-taprop__mingw.adb,
libgnarl/s-taprop__posix.adb, libgnarl/s-taprop__qnx.adb,
libgnarl/s-taprop__solaris.adb, libgnarl/s-taprop__vxworks.adb,
libgnarl/s-tarest.adb, libgnarl/s-tasini.adb,
libgnarl/s-taskin.adb, libgnarl/s-taspri__dummy.ads,
libgnarl/s-taspri__hpux-dce.ads, libgnarl/s-taspri__lynxos.ads,
libgnarl/s-taspri__mingw.ads,
libgnarl/s-taspri__posix-noaltstack.ads,
libgnarl/s-taspri__posix.ads, libgnarl/s-taspri__solaris.ads,
libgnarl/s-taspri__vxworks.ads, libgnarl/s-tassta.adb,
libgnarl/s-tasuti.adb, libgnarl/s-tposen.adb,
libgnat/a-except.adb, libgnat/a-except.ads,
libgnat/s-dwalin.adb, libgnat/s-dwalin.ads,
libgnat/s-mastop.ads, libgnat/s-soflin.adb,
libgnat/s-stalib.adb, libgnat/s-stalib.ads,
libgnat/s-stchop.adb, libgnat/s-stchop.ads,
libgnat/s-stchop__limit.ads, libgnat/s-traceb.ads,
libgnat/s-traent.adb, libgnat/s-traent.ads,
libgnat/s-trasym.adb, libgnat/s-trasym.ads,
libgnat/s-trasym__dwarf.adb, opt.adb, opt.ads, par-prag.adb,
sem_prag.adb, snames.ads-tmpl, switch-c.adb, targparm.adb,
targparm.ads, usage.adb: Remove support for -gnatP and pragma
Polling.
* gnat_ugn.texi: Regenerate.
* libgnat/a-excpol.adb, libgnat/a-excpol__abort.adb: Removed.

[Ada] Unique itypes names for unconstrained array object declaration

gcc/ada/

* sem_ch3.adb (Array_Type_Declaration): Create itype with unique
name.

[Ada] Cleanup related to itypes for unconstrained object declaration

gcc/ada/

* sem_ch3.adb (Analyze_Object_Declaration): Limit scope of a
local object by hiding it from local subprograms; simplify
nested if-then-if-then condition for an Ada 83 restriction.
(Array_Type_Declaration): Confirm with assertion when the else
branch is executed.
(Find_Type_Of_Object): Simplify membership test with a subtype
range.

[Ada] SPARK: update for effectively volatile types and objects

gcc/ada/

* sem_prag.adb (Analyze_Global_In_Decl_Part): Update check to
reject volatile object for reading.
* sem_res.adb (Resolve_Actuals, Resolve_Entity_Name): Update
check to reject volatile object for reading.
* sem_util.adb, sem_util.ads
(Check_Nonvolatile_Function_Profile,
Has_Effectively_Volatile_Profile): Detect use of volatile object
for reading.
(Has_Enabled_Property): Accept constants as well.
(Is_Effectively_Volatile_For_Reading): New function based on
existing Is_Effectively_Volatile.
(Is_Effectively_Volatile_Object_For_Reading): Adapted from the
existing Is_Effectively_Volatile_Object, using a shared
implementation in Is_Effectively_Volatile_Object_Shared.

[Ada] GNAT-LLVM unnesting issues in elaboration code

gcc/ada/

* exp_ch7.adb (Check_Unnesting_In_Decls_Or_Stmts): In the case
of an if-statement, call Unnest_If_Statement to determine
whether there are nested subprograms in any of the statement
lists of the "if" parts that require a wrapping procedure to
handle possible up-level refeferences.
(Unnest_Block): Call Check_Unnesting_In_Handlers to do unnesting
of subprograms in exception handlers of the block statement.
(Unnest_If_Statement): New procedure to traverse the parts of an
if-statement and create wrapper procedures as needed to
encapsulate nested subprograms that may make up-level
references.
(Check_Stmts_For_Subp_Unnesting): New support procedure in
Unnest_If_Statement to traverse a statement list looking for
top-level subprogram bodies that require wrapping inside a
procedure (via Unnest_Statement_List) as well as possibly having
other statements (block, loop, if) that may themselves require
an unnesting transformation (via
Check_Unnesting_In_Decls_Or_Stmts).
(Unnest_Statement_List): New support procedure to traverse the
statements of a statement list that contains subprogram bodies
at the top level and replace the statement list with a wrapper
procedure body encapsulating the statements and a call to the
procedure.

[Ada] Crash when specifying an abstract subprogram with Stream_Convert

gcc/ada/

* sem_prag.adb (Check_OK_Stream_Convert_Function): Check for
abstract subprograms.

[Ada] Fix documentation of No_Local_Timing_Events

gcc/ada/

* doc/gnat_rm/standard_and_implementation_defined_restrictions.rst
(No_Local_Timing_Events): Package Timing_Events is a child of
Ada.Real_Time, not of Ada.
* gnat_rm.texi: Regenerate.

[Ada] Add Max_Integer_Size attribute and couple of helper functions

gcc/ada/

* doc/gnat_rm/implementation_defined_attributes.rst: Document the
new Max_Integer_Size attribute.
* gnat_rm.texi: Regenerate.
* exp_attr.adb (Get_Integer_Type): Call Small_Integer_Type_For.
(Expand_N_Attribute_Reference) <Attribute_Pred>: Replace selection
code with call to Integer_Type_For.
<Attribute_Succ>: Likewise.
<Attribute_Val>: Likewise.
<Attribute_Valid>: Likewise.
<Attribute_Max_Integer_Size>: Raise Program_Error.
* exp_ch3.adb (Expand_Freeze_Enumeration_Type): Replace selection
code with call to Integer_Type_For.
(Simple_Init_Initialize_Scalars_Type): Use Long_Long_Unsigned and
System_Max_Integer_Size to size the largest integer type.
* exp_pakd.adb (Compute_Linear_Subscript): Minor tweak.
(Create_Packed_Array_Impl_Type): Use Small_Integer_Type_For.
* exp_util.ads (Integer_Type_For): New function.
(Small_Integer_Type_For): Likewise.
* exp_util.adb (Adjust_Condition): Use Integer_Type_For.
(Component_May_Be_Bit_Aligned): Use System_Max_Integer_Size.
(Integer_Type_For): New function.
(Small_Integer_Type_For): Likewise.
(Matching_Standard_Type): Use Small_Integer_Type_For.
(Needs_Constant_Address): Replace 64 with System_Max_Integer_Size.
* freeze.adb (Set_Small_Size): Likewise.
(Size_Known): Likewise.
(Check_Suspicious_Modulus): Likewise.
(Check_Large_Modular_Array): Likewise.
(Freeze_Entity): Likewise.
* layout.adb (Layout_Type): Likewise.
* sem_aggr.adb: Add with and use clauses for Ttypes.
(Resolve_Aggregate): Replace 64 with System_Max_Integer_Size.
* sem_attr.ads (Attribute_Impl_Def): Add Attribute_Max_Integer_Size.
* sem_attr.adb (Analyze_Attribute) <Attribute_Max_Integer_Size>: New
(Eval_Attribute): Likewise.
* sem_ch13.adb (Adjust_Record_For_Reverse_Bit_Order): Change max
scalar size to System_Max_Integer_Size.
(Check_Array_Type): Replace 64 with System_Max_Integer_Size and
remove superfluous test.
(OK_Component): Likewise.
* sem_ch5.adb: Add with and use clauses for Ttypes.
(Analyze_Assignment): Replace 64 with System_Max_Integer_Size.
* snames.ads-tmpl (Name_Max_Integer_Size): New attribute name.
(Attribute_Id): Add Attribute_Max_Integer_Size.
* ttypes.ads (System_Max_Integer_Size): New constant.

tree-optimization/97428 - split SLP groups for loop vectorization

This enables SLP store group splitting also for loop vectorization.
For the existing testcase gcc.dg/vect/vect-complex-5.c this then
generates much better code, likewise for the PR97428 testcase.

Both of those have a splitting opportunity splitting the group
into two equal (vector-sized) halves, still the patch enables
quite arbitrary splitting since generally the interleaving scheme
results in quite awkward code for even small groups.  If any
problems surface with this it's easy to restrict the splitting
to known-good cases.

2020-10-15  Richard Biener  <rguenther@suse.de>

PR tree-optimization/97428
* tree-vect-slp.c (vect_analyze_slp_instance): Split store
groups also for loop vectorization.

* gcc.dg/vect/vect-complex-5.c: Expect to SLP.
* gcc.dg/vect/pr97428.c: Likewise.

Daily bump.

compiler: don't export function type parameter names

When hashing a function type the parameter names are ignored.
Therefore, we should not write them into the export data.
Otherwise, minor changes in the order in which we process the
types can cause the export data to change uselessly, leading to
unnecessary rebuilds.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/262818

runtime: use correct types in __go_ptrace shim

Make the types of the addr and data arguments in the __go_ptrace shim
match the types declared in Go and the types declared by the C ptrace
function, i.e., void*. This avoids a warning about an implicit
int-to-pointer cast on some platforms.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/262340

libgo: correct Makefile typo in path to x/net/route package

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/262342

compiler: export type for string and bool constants

Also consolidate the identical code for constant type export into a
pair of static methods.

Fixes golang/go#35739

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/262437

testsuite: Fix some endianness bugs in p9 runnable tests.

This patch fixes some bugs in the powerpc testsuite for runnable tests
whose expected values were endian dependent.

gcc/testsuite/ChangeLog:

2020-10-15  David Edelsohn  <dje.gcc@gmail.com>

* gcc.target/powerpc/builtins-1-p9-runnable.c: Adjust for big endian.
* gcc.target/powerpc/builtins-7-p9-runnable.c: Same.

libstdc++: Fix typos in copyright notice

It looks like I did a s/a/__a/ substition in one of these headers, and
then copied it to the other one.

libstdc++-v3/ChangeLog:

* include/std/concepts: Fix typos in copyright notice.
* include/std/ranges: Likewise.

c++: Fix [[deprecated]] and implicit operator==. [PR97358]

Trying to diagnose the problem with an implicit copy function breaks if the
function isn't actually a copy function.

gcc/cp/ChangeLog:

PR c++/95844
* decl.c (copy_fn_p): Return false for a function that is neither a
constructor nor an assignment operator.
(move_signature_fn_p): Likewise.

gcc/testsuite/ChangeLog:

PR c++/95844
* g++.dg/cpp2a/spaceship-eq10.C: New test.

testsuite: Add appropriate target requirements to P9 testcases.

This patch adds effective target and target specific expected results
to a few P9 testcases.

gcc/testsuite/ChangeLog:

* gcc.target/powerpc/builtins-5-p9-runnable.c: Require lp64.
* gcc.target/powerpc/builtins-msum-runnable.c: Require int128.
* gcc.target/powerpc/float128-cmp2-runnable.c: Require float128.
* gcc.target/powerpc/fold-vec-extract-double.p9.c: Require lp64.

c++: Improve printing of pointers-to-members [PR97406, PR85901]

This PR points out that when printing the parameter mapping for a
pointer-to-member-function, the output was truncated:

  [with T = void (X::*]

Fixed by printing the abstract declarator for pointers-to-members in
cxx_pretty_printer::type_id.  So now we print:

  [with T = void (X::*)()]

But when I tried a pointer-to-data-member, I got

  [with T = ‘offset_type’ not supported by simple_type_specifier)‘offset_type’ not supported by direct_abstract_declarator]

so had to fix that too so that we now print:

  [with T = int X::*]

or

  [with T = int (X::*)[5]]

when the type is an array type.  Which is what PR85901 was about.

gcc/cp/ChangeLog:

PR c++/97406
PR c++/85901
* cxx-pretty-print.c (pp_cxx_type_specifier_seq): Handle OFFSET_TYPE.
(cxx_pretty_printer::abstract_declarator): Fix the printing of ')'.
(cxx_pretty_printer::direct_abstract_declarator): Handle OFFSET_TYPE.
(cxx_pretty_printer::type_id): Likewise.  Print the abstract declarator
for pointers-to-members.

gcc/testsuite/ChangeLog:

PR c++/97406
PR c++/85901
* g++.dg/diagnostic/ptrtomem1.C: New test.
* g++.dg/diagnostic/ptrtomem2.C: New test.

[nvptx, testsuite] Xfail stack atomics

Nvptx currently doesn't support atomics if it involves a stack address.
PR97444 is open about.

Xfail corresponding execution fails in gcc.dg/atomic.  Tested on nvptx.

gcc/testsuite/ChangeLog:

2020-10-15  Tom de Vries  <tdevries@suse.de>

* gcc.dg/atomic/c11-atomic-exec-6.c: Xfail execution for nvptx.
* gcc.dg/atomic/c11-atomic-exec-7.c: Same.
* gcc.dg/atomic/stdatomic-op-5.c: Same.

Fix fndecl's for fortran coarray calls.

gcc/fortran/ChangeLog:

* trans-decl.c (gfc_build_builtin_function_decls): Fix the coarray fndecls.

[nvptx] Remove -m32

The nvptx port has an -m32 option, but it's not clear whether this
was ever build/tested/used.

Don't expose to user anymore.  Tested on nvptx.

gcc/ChangeLog:

2020-10-15  Tom de Vries  <tdevries@suse.de>

PR target/97436
* config/nvptx/nvptx.opt (m32): Comment out.
* doc/invoke.texi (NVPTX options): Remove -m32.

gcc/testsuite/ChangeLog:

2020-10-15  Tom de Vries  <tdevries@suse.de>

PR target/97436
* gcc.target/nvptx/atomic_fetch-3.c: Remove.

Fix toplevel comment of attr-fnspec.h

gcc/ChangeLog:

2020-10-15  Jan Hubicka  <hubicka@ucw.cz>
    Richard Biener  <rguenther@suse.de>

* attr-fnspec.h: Fix toplevel comment.

fix TARGET_MEM_REF dumping

This fixes the missing constant offset from TARGET_MEM_REF dumping.

2020-10-15  Richard Biener  <rguenther@suse.de>

* tree-pretty-print.c (dump_mem_ref): Print constant offset
also for TARGET_MEM_REF.

Also accept symbols in other partition in symtab_node::binds_to_current_def_p

* symtab.c (symtab_node::binds_to_current_def_p): Also accept symbols
defined in other partition.

libgomp: Amend documentation for omp_get_max_active_levels and omp_get_supported_active_levels

2020-10-15  Kwok Cheung Yeung  <kcy@codesourcery.com>

libgomp/
* libgomp.texi (omp_get_max_active_levels): Modify description.
(omp_get_supported_active_levels): Make descriptions consistent.

Fix ICE in vectorizable_live_operation

This fixes the case where the insertion iterator for the live stmt
is the end of a BB by adjusting the dominance query to the definition
of the def we're substituting.

2020-10-15  Richard Biener  <rguenther@suse.de>

* tree-vect-loop.c (vectorizable_live_operation): Adjust
dominance query.

* gcc.dg/vect/bb-slp-52.c: New testcase.

[Ada] Spurious visibility on private with package

gcc/ada/

* sem_ch10.adb (Install_With_Clause): Fix implementation of Ada
2005 AI-262 by taking into account generic packages.  Minor
reformatting.
* libgnat/a-cbhase.ads, libgnat/a-cbhase.adb: Remove use clause
on runtime unit spec.

[Ada] Wrong use of Scope_Depth_Value

gcc/ada/

* einfo.ads, einfo.adb (Scope_Depth_Value,
Set_Scope_Depth_Value): Add assertions on valid nodes and update
documentation accordingly.
(Write_Field22_Name): Sync with change in Scope_Depth_Value.
* sem_ch8.adb (Find_Direct_Name): Fix call to Scope_Depth_Value.

[Ada] Ada2020: AI12-0003 Specifying the standard storage pool

gcc/ada/

* sem_prag.adb (Analyze_Pragma): Adding semantic support of
Standard to Default_Storage_Pool.
* freeze.adb (Freeze_Entity): If pragma Default_Storage_Pool
applies and it is set to Standard then use the global pool as
the associated storage pool of the access type.

[Ada] Cleanup definition of Might_Have_Tasks

gcc/ada/

* exp_ch6.ads (Might_Have_Tasks): Update documentation.
* exp_ch6.adb (Might_Have_Tasks): Return also true when the type
has tasks.
(Make_Build_In_Place_Call_In_Allocator): Code cleanup.
* exp_ch3.adb (Ensure_Activation_Chain_And_Master,
Expand_N_Full_Type_Declaration, Expand_N_Object_Declaration):
Code cleanup.

[Ada] Get finalization right when a function returns a function call

gcc/ada/

* checks.adb (Apply_Predicate_Check): Generate "infinite
recursion" warning message even if run-time predicate checking
is disabled.
* exp_ch6.adb (Expand_Simple_Function_Return): In testing
whether the returned expression is a function call, look for the
case where the call has been transformed into a dereference of
an access value that designates the result of a function call.
* sem_ch3.adb (Analyze_Object_Declaration): Legality checking
for a static expression is unaffected by assertion policy (and,
in particular, enabling/disabling of subtype predicates.  To get
the right legality checking, we need to call
Check_Expression_Against_Static_Predicate for a static
expression even if predicate checking is disabled for the given
predicate-bearing subtype.  On the other hand, we don't want to
call Make_Predicate_Check unless predicate checking is enabled.
* sem_ch7.adb (Uninstall_Declarations.Preserve_Full_Attributes):
Preserve the Predicates_Ignored attribute.
* sem_eval.adb (Check_Expression_Against_Static_Predicate):
Previously callers ensured that this procedure was only called
if predicate checking was enabled; that is no longer the case,
so predicates-disabled case must be handled.
* sem_prag.adb (Analyze_Pragma): Fix bug in setting
Predicates_Ignored attribute in Predicate pragma case.

[Ada] Crash on subtype of fixed-point type

gcc/ada/

* freeze.adb (Freeze_Fixed_Point_Type): Do not scale the bounds
of a declared subtype using the 'Small of the type;  this is
done during resolution of the bound itself, unlike what is done
for the bounds of the base type, which are used to determine its
required size. Previous code performed this scaling twice,
leading to meaningless values for such a subtype.

[Ada] Fix access to uninitialized global variable when emitting error

gcc/ada/

* sem_util.adb (Bad_Predicated_Subtype_Use): Emit an
unconditional error, not a conditional warning.

[Ada] Cleanup defensive guards for Null_Exclusion_Present

gcc/ada/

* sem_ch3.adb (Process_Subtype): Combine guards for
Null_Exclusion_Present in May_Have_Null_Exclusion; use this
combined guard when checking AI-231.

[Ada] Bring defensive guard for Null_Exclusion_Present up to date

gcc/ada/

* sem_ch3.adb (Process_Subtype): Sync May_Have_Null_Exclusion
with assertion in Null_Exclusion_Present; clarify the scope of
local variables.

[Ada] Explain predicate function not being inherited by index type

gcc/ada/

* sem_ch3.adb (Analyze_Subtype_Declaration): Fix style.
(Make_Index): Refactor to avoid repeated detection of subtype
indication; add comment.

[Ada] Adjust style in support for CUDA_Execute pragma

gcc/ada/

* sem_prag.adb (Is_Acceptable_Dim3): Use Is_RTE to not pull CUDA
package unless necessary; rename local Tmp variable; iterate
with procedural Next.

[Ada] Avoid unnecessary (re)assignments in Make_Info

gcc/ada/

* sem_ch3.adb (Array_Type_Declaration): Refine type of a local
variable.
(Make_Index): Simplify to avoid assignment with a type entity
and then backtracking by reassigning to Empty; remove excessive
whitespace.
* sem_ch9.adb (Analyze_Entry_Body): Remove extra parens.

[Ada] Remove excessive defensive calls to Is_Type

gcc/ada/

* sem_ch3.adb (Access_Subprogram_Declaration): Remove extra
parens.
(Make_Index): Remove excessive calls to Is_Type.

[Ada] Code cleanup

gcc/ada/

* sem_util.adb (Enter_Name): Remove unnecessary conditions in
Enter_Name that come from the beginning of times.

[Ada] Remove obsolete DSP comment

gcc/ada/

* exp_ch6.adb (Expand_Simple_Function_Return): Remove DSP part
of comment, and reformat.

[Ada] Do not expand 'Initialized in codepeer mode

gcc/ada/

* exp_attr.adb (Expand_N_Attribute_Reference): Do not expand
'Initialized in CodePeer mode.

[Ada] Assert failure on incorrect code

gcc/ada/

* sem_ch12.adb (Reset_Entity): Protect against malformed tree.

[Ada] Double evaluation of predicate

gcc/ada/

* sem_ch13.adb (Add_Predicates): Prevent analyzing twice the
same pragma in case an inner package references the type with a
predicate (as opposed to defining the type).

[Ada] Do not use maximal values from System in runtime units

gcc/ada/

* libgnat/a-cfinve.adb (Int): Use subtype of Long_Long_Integer.
* libgnat/a-cofove.adb (Int): Likewise.
* libgnat/a-cgcaso.adb (T): Likewise.
* libgnat/a-cogeso.adb (T): Likewise.
* libgnat/g-debpoo.ads (Byte_Count): Use Long_Long_Integer'Size.

[Ada] Simplify membership tests with N_Entity subtype

gcc/ada/

* sem_ch12.adb: Replace list of N_Defining_... enumerations with
N_Entity.

[Ada] Refine type from Nat to Pos in Make_Index

gcc/ada/

* sem_ch3.ads, sem_ch3.adb (Make_Index): Refined type of
parameter.
(Constrain_Index): Likewise.
(Array_Type_Declaration): Refine type of a local counter
variable; remove a trivially useless initialization.

[Ada] Fix range check on constrained array with expanded index name

gcc/ada/

* sem_ch3.adb (Analyze_Subtype_Declaration): Recognize both
identifiers and expanded names; use high-level Is_Scalar_Type
instead of low-level membership test.

[Ada] Add support for compile time evaluation of Shift_Right_Arithmetic

gcc/ada/

* sem_eval.adb (Eval_Intrinsic_Call, Fold_Shift): Add support
for Shift_Right_Arithmetic and for signed integers.
* exp_ch4.adb (Expand_N_Op_Rotate_Left,
Expand_N_Op_Rotate_Right, Expand_N_Op_Shift_Left,
Expand_N_Op_Shift_Right_Arithmetic): Minor reformatting and code
cleanup to ensure a consistent handling. Update comments and add
assertion.

[Ada] Ada2020: AI12-0180 Using subprograms and entries in invariants

gcc/ada/

* sem_ch13.adb (Visible_Component): Enable this code for task
and protected types, as well as record and private types.
* sem_ch13.ads (Replace_Type_References_Generic): Update
comment.  Move the efficiency comment into the body, because
it's about the implementation.

[Ada] Warn on unknown aspect

gcc/ada/

* par-ch13.adb (Get_Aspect_Specifications): Generate a warning
rather than an error on unknown aspects unless -gnatd2 is used.
(Aspect_Specifications_Present): Improve detection of unknown
aspects.
* debug.adb (Debug_Flag_2): Update document.

[Ada] Complete support for static intrinsic functions

gcc/ada/

* sem_res.adb (Resolve_Call): Do not try to inline intrinsic
calls.

[Ada] Ada_2020: Add aspect Aggregate to standard container units

gcc/ada/

* exp_aggr.adb (Expand_N_Aggregate): A record aggregate requires
a non-private type.
* sem_ch13.adb (Valid_Assign_Indexed): New subprogram local to
Resolve_Aspect_Aggregate, to handle the case when the
corresponding name appearing in the aspect specification for an
indexed aggregate is an overloaded operation.
* libgnat/a-convec.ads, libgnat/a-convec.adb,
libgnat/a-coinve.ads, libgnat/a-coinve.adb,
libgnat/a-cobove.ads, libgnat/a-cobove.adb,
libgnat/a-cdlili.ads, libgnat/a-cdlili.adb,
libgnat/a-cbdlli.ads, libgnat/a-cbdlli.adb,
libgnat/a-cohama.ads, libgnat/a-cihama.ads,
libgnat/a-cbhama.ads, libgnat/a-cborma.ads,
libgnat/a-ciorma.ads, libgnat/a-coorma.ads,
libgnat/a-cihase.ads, libgnat/a-cohase.ads,
libgnat/a-cbhase.ads, libgnat/a-cborse.ads,
libgnat/a-ciorse.ads, libgnat/a-coorse.ads: Add Ada_2020 aspect
Aggregate to types declared in standard containers, as well as
new subprograms where required.

[Ada] Add iterators over GNAT.Array_Split.Slice_Set

gcc/ada/

* libgnat/g-arrspl.ads, libgnat/g-arrspl.adb (Create,
First_Cursor, Advance, Has_Element): New.

[Ada] AI12-0385 Predefined shifts and rotates should be static

gcc/ada/

* Makefile.rtl: Add target pair for interfac.ads.
* libgnat/interfac.ads: Add a comment.
* libgnat/interfac__2020.ads: New, used for bootstrap purposes.
* sem_util.adb (Is_Static_Function): Always return False for pre
Ada 2020 to e.g. ignore the Static aspect in Interfaces for
Ada < 2020.

[Ada] Do not remove side effects from any object declarations in SPARK

gcc/ada/

* exp_util.adb (Remove_Side_Effects): Move special-casing for
GNATprove to be applied to all object declarations.

tree-optimization/97482 - fix split_constant_offset of nop-conversions

split_constant_offset is confused about a nop-conversion from
unsigned long to sizetype and tries to prove non-overflowing
of the inner operation.  Obviously the conversion could have been
elided so make sure split_constant_offset handles this properly.

It also makes sure that convert_to_ptrofftype does not introduce
conversions not necessary which in this case is the source for
the unnecessary conversion.

2020-10-15  Richard Biener  <rguenther@suse.de>

PR tree-optimization/97482
* tree-data-ref.c (split_constant_offset_1): Handle
trivial conversions better.
* fold-const.c (convert_to_ptrofftype_loc): Elide conversion
if the offset is already ptrofftype_p.

* gcc.dg/vect/pr97428.c: New testcase.

[nvptx, testsuite] Remove xfail for PR84958

The xfail in gcc.dg/tree-ssa/pr84512.c for PR84958 has started to xpass,
presumably because of commit 744fd446c32 "tree-ssa-sccvn.c (class pass_fre):
Add may_iterate pass parameter".

Remove the xfail.  Tested on nvptx.

gcc/testsuite/ChangeLog:

2020-10-15  Tom de Vries  <tdevries@suse.de>

* gcc.dg/tree-ssa/pr84512.c: Remove xfail for nvptx.

[nvptx, testsuite] Fix xpass with ident-0b.c

For nvptx, I see:
...
XPASS: c-c++-common/ident-0b.c  -Wc++-compat   scan-assembler-not GCC:
...

Fix this by requiring effective target ident_directive.  Tested on nvptx.

gcc/testsuite/ChangeLog:

2020-10-15  Tom de Vries  <tdevries@suse.de>

* c-c++-common/ident-0b.c: Require effective target ident_directive.

[nvptx, testsuite] Remove dg-skip-if for ptxas oom

There's a dg-skip-if for nvptx that is related to ptxas oom.

If I remove it, the test-case passes for me (with ptxas from cuda 9.1).

I've tested it on a range of cudas, from 5.0 to 11.1 and did not
manage to reproduce the fail.

Remove the dg-skip-if.  Tested on nvptx.

gcc/testsuite/ChangeLog:

2020-10-15  Tom de Vries  <tdevries@suse.de>

* gcc.c-torture/compile/limits-externdecl.c: Remove dg-skip-if for
nvptx.

[nvptx, testsuite] Disable default xfails

For nvptx, I run into a couple of XPASSes due to nvptx not being listed in:
...
  { xfail { ! { long list of targets } } }
...

Add nvptx to the list to get a PASS.  Tested on nvptx.

gcc/testsuite/ChangeLog:

2020-10-15  Tom de Vries  <tdevries@suse.de>

* gcc.dg/attr-alloc_size-11.c: Don't xfail for nvptx.
* gcc.dg/tree-ssa/20040204-1.c: Same.

[nvptx, testsuite] Remove dg-skip-if for ptxas crash fixed in cuda 8.0

The test-case gcc.c-torture/execute/pr68185.c has a dg-skip-if for nvptx due
to "ptxas crashes or executes incorrectly".

I've managed to reproduce the problem using cuda 7.5:
...
FAIL: gcc.c-torture/execute/pr68185.c   -O0  (test for excess errors)
Excess errors:
nvptx-as: ptxas terminated with signal 11 [Segmentation fault], core dumped
...
but it's fixed starting cuda 8.0.

Remove the dg-skip-if.  Tested on nvptx.

gcc/testsuite/ChangeLog:

2020-10-15  Tom de Vries  <tdevries@suse.de>

* gcc.c-torture/execute/pr68185.c: Remove dg-skip-if for nvptx.

[nvptx, testsuite] Remove dg-skip-if for ptxas crashes

There's a dg-skip-if for nvptx that is related to a ptxas crash.

If I remove it, the test-case passes for me (with ptxas from cuda 9.1).

I've tested this on a range of cudas, from 5.0 to 11.1 and did not
manage to reproduce the fail.

Remove the dg-skip-if.  Tested on nvptx.

gcc/testsuite/ChangeLog:

2020-10-15  Tom de Vries  <tdevries@suse.de>

* gcc.c-torture/execute/981019-1.c: Remove dg-skip-if for nvptx.

[nvptx, testsuite] Remove xpassing xfails for ptxas crashes

There's a couple of nvptx xfails that are related to ptxas crashes,
which are xpassing for me (with ptxas from cuda 9.1).

I've tested these on a range of cudas, from 5.0 to 11.1 and did not
manage to reproduce the fails.

Remove the xfails.  Tested on nvptx.

gcc/testsuite/ChangeLog:

2020-10-15  Tom de Vries  <tdevries@suse.de>

* gcc.c-torture/compile/pr42717.c: Remove nvptx xfail.
* gcc.c-torture/compile/pr61684.c: Same.
* gcc.c-torture/execute/pr20601-1.c: Same.
* gcc.c-torture/execute/pr52129.c: Same.
* gcc.c-torture/execute/pr59221.c: Same.
* gcc.dg/pr68671.c: Same.

testsuite: Partially fix up modref-*.c tests

This ia a partial attempt to fix:
FAIL: gcc.dg/ipa/modref-1.c (test for excess errors)
FAIL: gcc.dg/ipa/modref-1.c scan-ipa-dump modref "param offset: 1"
FAIL: gcc.dg/ipa/modref-1.c scan-ipa-dump modref "param offset: 2"
FAIL: gcc.dg/tree-ssa/modref-4.c (test for excess errors)
FAIL: gcc.dg/tree-ssa/modref-4.c scan-tree-dump modref1 "param offset: 1"
UNRESOLVED: gcc.dg/tree-ssa/modref-4.c scan-tree-dump modref2 "param offset: 2"
UNRESOLVED: gcc.dg/tree-ssa/modref-4.c scan-tree-dump modref2 "return 0"
The return 0 scan still FAILs.

2020-10-15  Jakub Jelinek  <jakub@redhat.com>

* gcc.dg/ipa/modref-1.c: Remove space between param offset: and number
in scan-ipa-dump.
(b): Declare return type to void.
(main): Declare return type to int.  Change c to array of 3 chars.
* gcc.dg/tree-ssa/modref-4.c: Remove space between param offset: and
number in scan-ipa-dump.  Use modref1 instead of modref2.
(b): Declare return type to void.
(main): Declare return type to int.  Change c to array of 3 chars.

IPA: fix profile handling in IRA

gcc/ChangeLog:

PR ipa/97295
* profile-count.c (profile_count::to_frequency): Move part of
gcc_assert to STATIC_ASSERT.
* regs.h (REG_FREQ_FROM_BB): Do not use count.to_frequency for
a function that does not have count_max initialized.

params: Fix up help.exp testing

This patch fixes:
Running /usr/src/gcc/gcc/testsuite/gcc.misc-tests/help.exp ...
FAIL: compiler driver --help=params option(s): "[^.]$" absent from output: "y"
FAIL: compiler driver --help=param option(s): "^ +-.*[^:.]$" absent from output: "  --param-ipa-jump-function-lookups= Maximum number of statements visited during jump function offset discovery"

2020-10-15  Jakub Jelinek  <jakub@redhat.com>

* params.opt (-param-ipa-jump-function-lookups=): Add full stop at
the end of the parameter description.

RISC-V: Add support for -mcpu option.

 - The behavior of -mcpu basically equal to -march plus -mtune, but it
   has lower priority than -march and -mtune.

 - The behavior and available options has sync with clang except we don't add
   few LLVM specific value, and add more sifive processor to the list.

 - -mtune also accept all available options of -mcpu, and use it setting.

gcc/ChangeLog:

* common/config/riscv/riscv-common.c (riscv_cpu_tables): New.
(riscv_arch_str): Return empty string if current_subset_list
is NULL.
(riscv_find_cpu): New.
(riscv_handle_option): Verify option value of -mcpu.
(riscv_expand_arch): Using std::string.
(riscv_default_mtune): New.
(riscv_expand_arch_from_cpu): Ditto.
* config/riscv/riscv-cores.def: New.
* config/riscv/riscv-protos.h (riscv_find_cpu): New.
(riscv_cpu_info): New.
* config/riscv/riscv.c (riscv_tune_info): Rename ...
(riscv_tune_param): ... to this.
(riscv_cpu_info): Rename ...
(riscv_tune_info): ... to this.
(tune_info): Rename ...
(tune_param): ... to this.
(rocket_tune_info): Update data type name.
(sifive_7_tune_info): Ditto.
(optimize_size_tune_info): Ditto.
(riscv_cpu_info_table): Rename ...
(riscv_tune_info_table): ... to this.
(riscv_parse_cpu): Rename ...
(riscv_parse_tune): ... to this, and translate valid -mcpu option to
-mtune option.
(riscv_rtx_costs): Rename tune_info to tune_param.
(riscv_class_max_nregs): Ditto.
(riscv_memory_move_cost): Ditto.
(riscv_init_machine_status): Use value of -mcpu if -mtune is not
given, and rename tune_info to tune_param.
* config/riscv/riscv.h (riscv_expand_arch_from_cpu): New.
(riscv_default_mtune): Ditto.
(EXTRA_SPEC_FUNCTIONS): Add riscv_expand_arch_from_cpu and
riscv_default_mtune.
(OPTION_DEFAULT_SPECS): Handle default value of -march/-mabi.
(DRIVER_SELF_SPECS): Expand -march from -mcpu if -march is not
given.
* config/riscv/riscv.opt (-mcpu): New option.
* config/riscv/t-riscv ($(common_out_file)): Add
riscv-cores.def to dependency.
* doc/invoke.texi (RISC-V Option): Add -mcpu, and update the
description of default value for -mtune and -march.

gcc/testsuite/ChangeLog:

* gcc.target/riscv/mcpu-1.c: New.
* gcc.target/riscv/mcpu-2.c: Ditto.
* gcc.target/riscv/mcpu-3.c: Ditto.
* gcc.target/riscv/mcpu-4.c: Ditto.
* gcc.target/riscv/mcpu-5.c: Ditto.
* gcc.target/riscv/mcpu-6.c: Ditto.
* gcc.target/riscv/mcpu-7.c: Ditto.

Enable Intel HRESET Instruction

gcc/

* common/config/i386/cpuinfo.h (get_available_features):
Detect HRESET.
* common/config/i386/i386-common.c (OPTION_MASK_ISA2_HRESET_SET,
OPTION_MASK_ISA2_HRESET_UNSET): New macros.
(ix86_handle_option): Handle -mhreset.
* common/config/i386/i386-cpuinfo.h (enum processor_features):
Add FEATURE_HRESET.
* common/config/i386/i386-isas.h: Add ISA_NAMES_TABLE_ENTRY
for hreset.
* config.gcc: Add hresetintrin.h
* config/i386/hresetintrin.h: New header file.
* config/i386/x86gprintrin.h: Include hresetintrin.h.
* config/i386/cpuid.h (bit_HRESET): New.
* config/i386/i386-builtin.def: Add new builtin.
* config/i386/i386-expand.c (ix86_expand_builtin):
Handle new builtin.
* config/i386/i386-c.c (ix86_target_macros_internal): Define
__HRESET__.
* config/i386/i386-options.c (isa2_opts): Add -mhreset.
(ix86_valid_target_attribute_inner_p): Handle hreset.
* config/i386/i386.h (TARGET_HRESET, TARGET_HRESET_P,
PTA_HRESET): New.
(PTA_ALDERLAKE): Add PTA_HRESET.
* config/i386/i386.opt: Add option -mhreset.
* config/i386/i386.md (UNSPECV_HRESET): New unspec.
(hreset): New define_insn.
* doc/invoke.texi: Document -mhreset.
* doc/extend.texi: Document hreset.

gcc/testsuite/

* gcc.target/i386/hreset-1.c: New test.
* gcc.target/i386/funcspec-56.inc: Add new target attribute.
* gcc.target/i386/x86gprintrin-1.c: Add -mhreset.
* gcc.target/i386/x86gprintrin-2.c: Ditto.
* gcc.target/i386/x86gprintrin-3.c: Ditto.
* gcc.target/i386/x86gprintrin-4.c: Add mhreset.
* gcc.target/i386/x86gprintrin-5.c: Ditto.

Enable gcc support for UINTR

2020-05-20  Hongtao Liu  <hongtao.liu@intel.com>

gcc/
* common/config/i386/cpuinfo.h (get_available_features):
Detect UINTR.
* common/config/i386/i386-common.c (OPTION_MASK_ISA2_UINTR_SET
OPTION_MASK_ISA2_UINTR_UNSET): New.
(ix86_handle_option): Handle -muintr.
* common/config/i386/i386-cpuinfo.h (enum processor_features):
Add FEATURE_UINTR.
* common/config/i386/i386-isas.h: Add ISA_NAMES_TABLE_ENTRY
for uintr.
* config.gcc: Add uintrintrin.h to extra_headers.
* config/i386/uintrintrin.h: New.
* config/i386/cpuid.h (bit_UINTR): New.
* config/i386/i386-builtin-types.def: Add new types.
* config/i386/i386-builtin.def: Add new builtins.
* config/i386/i386-builtins.c (ix86_init_mmx_sse_builtins): Add
__builtin_ia32_testui.
* config/i386/i386-builtins.h (ix86_builtins): Add
IX86_BUILTIN_TESTUI.
* config/i386/i386-c.c (ix86_target_macros_internal): Define
__UINTR__.
* config/i386/i386-expand.c (ix86_expand_special_args_builtin):
Handle UINT8_FTYPE_VOID.
(ix86_expand_builtin): Handle IX86_BUILTIN_TESTUI.
* config/i386/i386-options.c (isa2_opts): Add -muintr.
(ix86_valid_target_attribute_inner_p): Handle UINTR.
(ix86_option_override_internal): Add TARGET_64BIT check for UINTR.
* config/i386/i386.h (TARGET_UINTR, TARGET_UINTR_P, PTA_UINTR): New.
(PTA_SAPPHIRRAPIDS): Add PTA_UINTR.
* config/i386/i386.opt: Add -muintr.
* config/i386/i386.md
(define_int_iterator UINTR_UNSPECV): New.
(define_int_attr uintr_unspecv): New.
(uintr_<uintr_unspecv>, uintr_senduipi, testui):
New define_insn patterns.
* config/i386/x86gprintrin.h: Include uintrintrin.h
* doc/invoke.texi: Document -muintr.
* doc/extend.texi: Document uintr.

gcc/testsuite/

* gcc.target/i386/funcspec-56.inc: Add new target attribute.
* gcc.target/i386/uintr-1.c: New test.
* gcc.target/i386/uintr-2.c: Ditto.
* gcc.target/i386/uintr-3.c: Ditto.
* gcc.target/i386/uintr-4.c: Ditto.
* gcc.target/i386/uintr-5.c: Ditto.
* gcc.target/i386/x86gprintrin-1.c: Add -muintr for 64bit target.
* gcc.target/i386/x86gprintrin-2.c: Ditto.
* gcc.target/i386/x86gprintrin-3.c: Ditto.
* gcc.target/i386/x86gprintrin-4.c: Add muintr for 64bit target.
* gcc.target/i386/x86gprintrin-5.c: Ditto.

Daily bump.

libgo: print reason code if throwing unwind exception fails

Calls to _Unwind_RaiseException and friends *can* return due to bugs in
libgo or memory corruption. When this occurs, print a message to stderr
with the reason code before aborting to aid debugging.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/261257

PR middle-end/97391 - bogus -Warray-bounds accessing a multidimensional array parameter

gcc/ChangeLog:

PR middle-end/97391
* builtins.c (gimple_parm_array_size): Peel off one less layer
of array types.

gcc/testsuite/ChangeLog:

PR middle-end/97391
* gcc.dg/Warray-bounds-68.c: New test.

PR c/97413 - bogus error on function declaration with many VLA arguments

gcc/ChangeLog:

PR c/97413
* attribs.c (init_attr_rdwr_indices): Unwrap extra list layer.

gcc/c-family/ChangeLog:

PR c/97413
* c-attribs.c (build_attr_access_from_parms): Wrap chain of VLA
bounds in an extra list.

gcc/testsuite/ChangeLog:

PR c/97413
* gcc.dg/Wvla-parameter-8.c: New test.

[testsuite] Don't overwrite compiler_flags in check_compile

Consider the test-case gcc.c-torture/compile/pr42717.c, which has:
...
/* { dg-xfail-if "ptxas crashes" { nvptx-*-* } { "-O0" } { "" } } */
...

When running make check-gcc, I get:
...
XPASS: gcc.c-torture/compile/pr42717.c   -O0  (test for excess errors)
...
but when forcing to run only that test-case using
RUNTESTFLAGS=compile.exp=pr42717.c I get instead:
...
PASS: gcc.c-torture/compile/pr42717.c   -O0  (test for excess errors)
...

Using RUNTESTFLAGS="-v -v -v" we can see what happens:
...
check_cached_effective_target exceptions_enabled: \
  returning 1 for nvptx-none-run
Limited to targets: *-*-*
Will search for options  "-O0"
Will exclude for options  ""
Compiler flags are: exceptions_enabled9848.cc -fdiagnostics-plain-output \
  --sysroot=/home/vries/nvptx/trunk/install/nvptx-none -S  -isystem \
  /home/vries/nvptx/trunk/build-gcc/nvptx-none/./newlib/targ-include \
  -isystem /home/vries/nvptx/trunk/source-gcc/newlib/libc/include \
  -o exceptions_enabled9848.s
Checking "*-*-*" against "nvptx-unknown-none"
Looking for -O0 to include in the compiler flags
Looking for  to exclude in the compiler flags
This is not a conditional match
PASS: gcc.c-torture/compile/pr42717.c   -O0  (test for excess errors)
...

The effective target exceptions_enabled is tested from gcc-dg-prune, but
the calculation overwrites $compiler_flags, which is subsequently tested for
-O0.

Fix this by saving and restoring $compiler_flags when calling
${tool}_target_compile in check_compile.

Tested on nvptx.

gcc/testsuite/ChangeLog:

2020-10-14  Tom de Vries  <tdevries@suse.de>

* lib/target-supports.exp (check_compile): Save and restore
$compiler_flags when calling ${tool}_target_compile.

libgo: export NetBSD-specific types in mksysinfo.sh

The syscall package depends on many NetBSD-specific types on NetBSD.
Teach mksysinfo.sh to export these types.

This alone is not sufficient to get the syscall package to compile on
NetBSD, but it's a start.

Note that the IfMsgHdr type is recapitalized to IfMsghdr, which requires
changes in the AIX port. The new capitalization is what's used by
upstream in existing NetBSD-specific code and is more consistent with
the capitalization of other C structs with the "hdr" suffix.

Updates golang/go#38538.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/261739

runtime: correct semaphore implementation on netbsd

NetBSD's semaphores use the underlying lighweight process mechanism
(LWP) on NetBSD, rather than pthreads. This means the m.prodcid needs
to be set to the LWP ID rather than the pthread ID in order for unpark
notifications to get sent to the right place.

Introduce a new getProcID() method that selects the correct ID for the
platform.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/261742

analyzer: fix ICE on globals with unknown size [PR93388]

This patch fixes an ICE seen when attempting to build various existing
tests in our testsuite with -fanalyzer, including
gcc.c-torture/compile/980816-1.c.

gcc/analyzer/ChangeLog:
PR analyzer/93388
* region-model.cc (region_model::get_initial_value_for_global):
Fall back to returning an initial_svalue if
decl_region::get_svalue_for_initializer fails.
* region.cc (decl_region::get_svalue_for_initializer): Don't
attempt to create a compound_svalue if the region has an unknown
size.

gcc/testsuite/ChangeLog:
PR analyzer/93388
* gcc.dg/analyzer/data-model-21.c: New test.

analyzer: fix build with ada [PR93723]

gcc/analyzer/ChangeLog:
PR analyzer/93723
* store.cc (binding_map::apply_ctor_to_region): Remove redundant
assertion.

analyzer: don't use <setjmp.h> in tests [PR97394]

PR analyzer/97394 reports issues with analyzer setjmp results
when testing against MUSL.  This patch fixes up gcc.dg/analyzer
so that it doesn't use <setjmp.h>.

gcc/testsuite/ChangeLog:
PR analyzer/97394
* gcc.dg/analyzer/setjmp-pr93378.c: Use test-setjmp.h rather than
<setjmp.h>.
* gcc.dg/analyzer/sigsetjmp-5.c: Likewise.
* gcc.dg/analyzer/sigsetjmp-6.c: Likewise.
* gcc.dg/analyzer/test-setjmp.h: Don't include <setjmp.h>.
Provide decls of jmp_buf, sigjmp_buf, setjmp, sigsetjmp,
longjmp, and siglongjmp.

c++: Diagnose bogus variadic lambda. [PR97358]

If the lambda has a capture pack, it cannot be used unexpanded within the
body of the lambda.  If you want to expand the pack across multiple lambdas,
don't capture the whole pack.

gcc/cp/ChangeLog:

PR c++/97358
* pt.c (check_for_bare_parameter_packs): Diagnose use of
capture pack.

gcc/testsuite/ChangeLog:

PR c++/97358
* g++.dg/cpp0x/lambda/lambda-variadic11.C: New test.

Rework the condition variables support for VxWorks

This change reworks the condition variables support for VxWorks
to address the very legit points raised by Rasmus in

 https://gcc.gnu.org/pipermail/gcc/2020-May/232524.html

While some of the issues were taken care of by the use of semFlush,
a few others were indeed calling for adjustments.

We first considered resorting to the condvarLib library available
in VxWorks7. Unfortunately, it is vx7 only and we wanted something working
for at least vx 6.9 as well. It also turned out requiring the use of
recursive mutexes for condVarWait, which seemed unnecessarily constraining.

Instead, this change corrects the sequencing logic in a few places and
leverages the semExchange API to ensure the key atomicity requirement on
cond_wait operations.

2020-10-14  Alexandre Oliva  <oliva@adacore.com>

libgcc/
* config/gthr-vxworks-thread.c: Include stdlib.h.
(tls_delete_hook): Prototype it.
(__gthread_cond_signal): Return early if no waiters.  Consume
signal in case the semaphore got full.  Use semInfoGet instead
of kernel-mode-only semInfo.
(__gthread_cond_timedwait): Use semExchange.  Always take the
mutex again before returning.
* config/gthr-vxworks-cond.c (__ghtread_cond_wait): Likewise.

x86: Add missing intrinsics [PR95483]

Tested on x86-64.

gcc/ChangeLog:

PR target/95483
* config/i386/avx2intrin.h (_mm_broadcastsi128_si256): New intrinsics.
(_mm_broadcastsd_pd): Ditto.
* config/i386/avx512bwintrin.h (_mm512_loadu_epi16): New intrinsics.
(_mm512_storeu_epi16): Ditto.
(_mm512_loadu_epi8): Ditto.
(_mm512_storeu_epi8): Ditto.
* config/i386/avx512dqintrin.h (_mm_reduce_round_sd): New intrinsics.
(_mm_mask_reduce_round_sd): Ditto.
(_mm_maskz_reduce_round_sd): Ditto.
(_mm_reduce_round_ss): Ditto.
(_mm_mask_reduce_round_ss): Ditto.
(_mm_maskz_reduce_round_ss): Ditto.
(_mm512_reduce_round_pd): Ditto.
(_mm512_mask_reduce_round_pd): Ditto.
(_mm512_maskz_reduce_round_pd): Ditto.
(_mm512_reduce_round_ps): Ditto.
(_mm512_mask_reduce_round_ps): Ditto.
(_mm512_maskz_reduce_round_ps): Ditto.
* config/i386/avx512erintrin.h
(_mm_mask_rcp28_round_sd): New intrinsics.
(_mm_maskz_rcp28_round_sd): Ditto.
(_mm_mask_rcp28_round_ss): Ditto.
(_mm_maskz_rcp28_round_ss): Ditto.
(_mm_mask_rsqrt28_round_sd): Ditto.
(_mm_maskz_rsqrt28_round_sd): Ditto.
(_mm_mask_rsqrt28_round_ss): Ditto.
(_mm_maskz_rsqrt28_round_ss): Ditto.
(_mm_mask_rcp28_sd): Ditto.
(_mm_maskz_rcp28_sd): Ditto.
(_mm_mask_rcp28_ss): Ditto.
(_mm_maskz_rcp28_ss): Ditto.
(_mm_mask_rsqrt28_sd): Ditto.
(_mm_maskz_rsqrt28_sd): Ditto.
(_mm_mask_rsqrt28_ss): Ditto.
(_mm_maskz_rsqrt28_ss): Ditto.
* config/i386/avx512fintrin.h (_mm_mask_sqrt_sd): New intrinsics.
(_mm_maskz_sqrt_sd): Ditto.
(_mm_mask_sqrt_ss): Ditto.
(_mm_maskz_sqrt_ss): Ditto.
(_mm_mask_scalef_sd): Ditto.
(_mm_maskz_scalef_sd): Ditto.
(_mm_mask_scalef_ss): Ditto.
(_mm_maskz_scalef_ss): Ditto.
(_mm_mask_cvt_roundsd_ss): Ditto.
(_mm_maskz_cvt_roundsd_ss): Ditto.
(_mm_mask_cvt_roundss_sd): Ditto.
(_mm_maskz_cvt_roundss_sd): Ditto.
(_mm_mask_cvtss_sd): Ditto.
(_mm_maskz_cvtss_sd): Ditto.
(_mm_mask_cvtsd_ss): Ditto.
(_mm_maskz_cvtsd_ss): Ditto.
(_mm512_cvtsi512_si32): Ditto.
(_mm_cvtsd_i32): Ditto.
(_mm_cvtss_i32): Ditto.
(_mm_cvti32_sd): Ditto.
(_mm_cvti32_ss): Ditto.
(_mm_cvtsd_i64): Ditto.
(_mm_cvtss_i64): Ditto.
(_mm_cvti64_sd): Ditto.
(_mm_cvti64_ss): Ditto.
* config/i386/avx512vlbwintrin.h (_mm256_storeu_epi8): New intrinsics.
(_mm_storeu_epi8): Ditto.
(_mm256_loadu_epi16): Ditto.
(_mm_loadu_epi16): Ditto.
(_mm256_loadu_epi8): Ditto.
(_mm_loadu_epi8): Ditto.
(_mm256_storeu_epi16): Ditto.
(_mm_storeu_epi16): Ditto.
* config/i386/avx512vlintrin.h (_mm256_load_epi64): New intrinsics.
(_mm_load_epi64): Ditto.
(_mm256_load_epi32): Ditto.
(_mm_load_epi32): Ditto.
(_mm256_store_epi32): Ditto.
(_mm_store_epi32): Ditto.
(_mm256_loadu_epi64): Ditto.
(_mm_loadu_epi64): Ditto.
(_mm256_loadu_epi32): Ditto.
(_mm_loadu_epi32): Ditto.
(_mm256_mask_cvt_roundps_ph): Ditto.
(_mm256_maskz_cvt_roundps_ph): Ditto.
(_mm_mask_cvt_roundps_ph): Ditto.
(_mm_maskz_cvt_roundps_ph): Ditto.
* config/i386/avxintrin.h (_mm256_cvtsi256_si32): New intrinsics.
* config/i386/emmintrin.h (_mm_loadu_si32): New intrinsics.
(_mm_loadu_si16): Ditto.
(_mm_storeu_si32): Ditto.
(_mm_storeu_si16): Ditto.
* config/i386/i386-builtin-types.def
(V8DF_FTYPE_V8DF_INT_V8DF_UQI_INT): Add new type.
(V16SF_FTYPE_V16SF_INT_V16SF_UHI_INT): Ditto.
(V4SF_FTYPE_V4SF_V2DF_V4SF_UQI_INT): Ditto.
(V2DF_FTYPE_V2DF_V4SF_V2DF_UQI_INT): Ditto.
* config/i386/i386-builtin.def
(__builtin_ia32_cvtsd2ss_mask_round): New builtin.
(__builtin_ia32_cvtss2sd_mask_round): Ditto.
(__builtin_ia32_rcp28sd_mask_round): Ditto.
(__builtin_ia32_rcp28ss_mask_round): Ditto.
(__builtin_ia32_rsqrt28sd_mask_round): Ditto.
(__builtin_ia32_rsqrt28ss_mask_round): Ditto.
(__builtin_ia32_reducepd512_mask_round): Ditto.
(__builtin_ia32_reduceps512_mask_round): Ditto.
(__builtin_ia32_reducesd_mask_round): Ditto.
(__builtin_ia32_reducess_mask_round): Ditto.
* config/i386/i386-expand.c
(ix86_expand_round_builtin): Expand round builtin for new type.
(V8DF_FTYPE_V8DF_INT_V8DF_UQI_INT)
(V16SF_FTYPE_V16SF_INT_V16SF_UHI_INT)
(V4SF_FTYPE_V4SF_V2DF_V4SF_UQI_INT)
(V2DF_FTYPE_V2DF_V4SF_V2DF_UQI_INT)
* config/i386/mmintrin.h ()
Define datatype __m32 and __m16.
Define datatype __m32_u and __m16_u.
* config/i386/sse.md: Adjust pattern.
(<mask_codefor>reducep<mode><mask_name><round_saeonly_name>): Adjust.
(reduces<mode><mask_scalar_name><round_saeonly_scalar_name>): Ditto.
(sse2_cvtsd2ss<mask_name><round_name>): Ditto.
(sse2_cvtss2sd<mask_name><round_saeonly_name>): Ditto.
(avx512er_vmrcp28<mode><mask_name><round_saeonly_name>): Ditto.
(avx512er_vmrsqrt28<mode><mask_name><round_saeonly_name>): Ditto.

gcc/testsuite/ChangeLog:

PR target/95483
* gcc.target/i386/avx-1.c: Add test.
* gcc.target/i386/avx2-vbroadcastsi128-1.c: Ditto.
* gcc.target/i386/avx2-vbroadcastsi128-2.c: Ditto.
* gcc.target/i386/avx512bw-vmovdqu16-1.c: Ditto.
* gcc.target/i386/avx512bw-vmovdqu8-1.c: Ditto.
* gcc.target/i386/avx512dq-vreducesd-1.c: Ditto.
* gcc.target/i386/avx512dq-vreducesd-2.c: Ditto.
* gcc.target/i386/avx512dq-vreducess-1.c: Ditto.
* gcc.target/i386/avx512dq-vreducess-2.c: Ditto.
* gcc.target/i386/avx512er-vrcp28sd-1.c: Ditto.
* gcc.target/i386/avx512er-vrcp28sd-2.c: Ditto.
* gcc.target/i386/avx512er-vrcp28ss-1.c: Ditto.
* gcc.target/i386/avx512er-vrcp28ss-2.c: Ditto.
* gcc.target/i386/avx512er-vrsqrt28sd-1.c: Ditto.
* gcc.target/i386/avx512er-vrsqrt28sd-2.c: Ditto.
* gcc.target/i386/avx512er-vrsqrt28ss-1.c: Ditto.
* gcc.target/i386/avx512er-vrsqrt28ss-2.c: Ditto.
* gcc.target/i386/avx512f-vcvtsd2si-1.c: Ditto.
* gcc.target/i386/avx512f-vcvtsd2si64-1.c: Ditto.
* gcc.target/i386/avx512f-vcvtsd2ss-1.c: Ditto.
* gcc.target/i386/avx512f-vcvtsi2sd64-1.c: Ditto.
* gcc.target/i386/avx512f-vcvtsi2ss-1.c: Ditto.
* gcc.target/i386/avx512f-vcvtsi2ss64-1.c: Ditto.
* gcc.target/i386/avx512f-vcvtss2sd-1.c: Ditto.
* gcc.target/i386/avx512f-vcvtss2si-1.c: Ditto.
* gcc.target/i386/avx512f-vcvtss2si64-1.c: Ditto.
* gcc.target/i386/avx512f-vscalefsd-1.c: Ditto.
* gcc.target/i386/avx512f-vscalefsd-2.c: Ditto.
* gcc.target/i386/avx512f-vscalefss-1.c: Ditto.
* gcc.target/i386/avx512f-vscalefss-2.c: Ditto.
* gcc.target/i386/avx512f-vsqrtsd-1.c: Ditto.
* gcc.target/i386/avx512f-vsqrtsd-2.c: Ditto.
* gcc.target/i386/avx512f-vsqrtss-1.c: Ditto.
* gcc.target/i386/avx512f-vsqrtss-2.c: Ditto.
* gcc.target/i386/avx512vl-vmovdqa32-1.c: Ditto.
* gcc.target/i386/avx512vl-vmovdqa64-1.c: Ditto.
* gcc.target/i386/sse-13.c: Ditto.
* gcc.target/i386/sse-23.c: Ditto.
* gcc.target/i386/avx512dq-vreducepd-3.c: New test.
* gcc.target/i386/avx512dq-vreducepd-4.c: New test.
* gcc.target/i386/avx512dq-vreduceps-3.c: New test.
* gcc.target/i386/avx512dq-vreduceps-4.c: New test.
* gcc.target/i386/avx512f-vcvtsi2sd-1.c: New test.
* gcc.target/i386/pr95483-1.c: New test.
* gcc.target/i386/pr95483-2.c: New test.
* gcc.target/i386/pr95483-3.c: New test.
* gcc.target/i386/pr95483-4.c: New test.
* gcc.target/i386/pr95483-5.c: New test.
* gcc.target/i386/pr95483-6.c: New test.
* gcc.target/i386/pr95483-7.c: New test.

Fix the VX_CPU selection for -mcpu=xscale on arm-vxworks

This fixlet makes sure -mcpu=xscale selects the correct VX_CPU.

2020-10-14  Olivier Hainque  <hainque@adacore.com>

gcc/
* config/arm/vxworks.h (TARGET_OS_CPP_BUILTINS): Fix
the VX_CPU selection for -mcpu=xscale on arm-vxworks.

libstdc++: Fix unspecified comparison to null pointer [PR 97415]

The standard doesn't guarantee that null pointers compare less than
non-null pointers. AddressSanitizer complains about the pptr()> egptr()
comparison in basic_stringbuf::str() when egptr() is null.

libstdc++-v3/ChangeLog:

PR libstdc++/97415
* include/std/sstream (basic_stringbuf::str()): Check for
null egptr() before comparing to non-null pptr().

Rework CPP_BUILTINS_SPEC for powerpc-vxworks

This change reworks CPP_BUILTINS_SPEC for powerpc-vxworks to
prepare for the upcoming addition of 32 and 64 bit ports for
VxWorks 7r2.

2020-10-14  Olivier Hainque  <hainque@adacore.com>

gcc/
* config/rs6000/vxworks.h (TARGET_OS_CPP_BUILTINS): Accommodate
expectations from different versions of VxWorks, for 32 or 64bit
configurations.

Fallback to default CPP spec for C++ on VxWorks

Arrange to inhibit the effects of CPLUSPLUS_CPP_SPEC in gnu-user.h,
which #defines _GNU_SOURCE, which is invalid for VxWorks (possibly
not providing ::mkstemp, for example).

2020-10-14  Olivier Hainque  <hainque@adacore.com>

gcc/
* config/vxworks.h: #undef CPLUSPLUS_CPP_SPEC.

Honor $(MULTISUBDIR) in -I directives for libgcc on VxWorks

This is useful to handle ports where we might arrange to use
different sets of fixed headers for different multilibs, typically
for kernel vs rtp modes.

2020-10-14  Olivier Hainque  <hainque@adacore.com>

libgcc/
* config/t-vxworks (LIBGCC2_INCLUDES): Append
$(MULTISUBDIR) to the -I path for fixed headers, as we
arrange to have different sets of such headers for different
multilibs when they are activated.
* config/t-vxworks7: Likewise.

Add include-fixed to include search paths for libgcc on VxWorks

The special vxworks rules for the compilation of libgcc had
-I.../gcc/include and not .../gcc/include-fixed, causing build
failure of our arm-vxworks7r2 port because of indirect dependencies
on limits.h.

The omission was just an oversight and this change just adds the
missing -I.

2020-10-14  Olivier Hainque  <hainque@adacore.com>

libgcc/
* config/t-vxworks: Add include-fixed to include search
paths for libgcc on VxWorks.
* config/t-vxworks7: Likewise.

Adjust the VxWorks alternative LIMITS_H guard for glimits.h

This is a minor adjustment to the vxworks specific macro name
used to guard the header file contents, to make it closer to the
original one and easier to search for.

2020-10-14  Olivier Hainque  <hainque@adacore.com>

gcc/
* config/t-vxworks: Adjust the VxWorks alternative LIMITS_H guard
for glimits.h, make it both closer to the previous one and easier to
search for.

c++: DECL_FRIEND_P cleanup

DECL_FRIEND_P's meaning has changed over time.  It now (almost) means
the the friend function decl has not been met via an explicit decl.
This completes that transition, renaming it to DECL_UNIQUE_FRIEND_P,
so one doesn't think it is the sole indicator of friendliness (plenty
of friends do not have the flag set).  This allows reduction in the
complexity of managing the field -- all in duplicate_decls now.

gcc/cp/
* cp-tree.h (struct lang_decl_fn): Adjust context comment.
(DECL_FRIEND_P): Replace with ...
(DECL_UNIQUE_FRIEND_P): ... this.  Only for FUNCTION_DECLs.
(DECL_FRIEND_CONTEXT): Adjust.
* class.c (add_implicitly_declared_members): Detect friendly
spaceship from context.
* constraint.cc (remove_constraints): Use a checking assert.
(maybe_substitute_reqs_for): Use DECL_UNIQUE_FRIEND_P.
* decl.c (check_no_redeclaration_friend_default_args):
DECL_UNIQUE_FRIEND_P is signficant, not hiddenness.
(duplicate_decls): Adjust DECL_UNIQUE_FRIEND_P clearing.
(redeclaration_error_message): Use DECL_UNIQUE_FRIEND_P.
(start_preparsed_function): Correct in-class friend processing.
Refactor some initializers.
(grokmethod): Directly check friend decl-spec.
* decl2.c (grokfield): Check DECL_UNIQUE_FRIEND_P.
* friend.c (do_friend): Set DECL_UNIQUE_FRIEND_P first, remove
extraneous conditions.  Don't re set it afterwards.
* name-lookup.c (lookup_elaborated_type_1): Simplify revealing
code.
(do_pushtag): Likewise.
* pt.c (optimize_specialization_lookup_p): Check
DECL_UNIQUE_FRIEND_P.
(push_template_decl): Likewise.  Drop unneeded friend setting.
(type_dependent_expression_p): Check DECL_UNIQUE_FRIEND_P.
libcc1/
* libcp1plugin.cc (plugin_add_friend): Set DECL_UNIQUE_FRIEND_P.

i386: Improve chaining of _{addcarry,subborrow}_u{32,64} [PR97387]

These builtins have two known issues and this patch fixes one of them.

One issue is that the builtins effectively return two results and
they make the destination addressable until expansion, which means
a stack slot is allocated for them and e.g. with -fstack-protector*
DSE isn't able to optimize that away.  I think for that we want to use
the technique of returning complex value; the patch doesn't handle that
though.  See PR93990 for that.

The other problem is optimization of successive uses of the builtin
e.g. for arbitrary precision arithmetic additions/subtractions.
As shown PR93990, combine is able to optimize the case when the first
argument to these builtins is 0 (the first instance when several are used
together), and also the last one if the last one ignores its result (i.e.
the carry/borrow is dead and thrown away in that case).
As shown in this PR, combiner refuses to optimize the rest, where it sees:
(insn 10 9 11 2 (set (reg:QI 88 [ _31 ])
        (ltu:QI (reg:CCC 17 flags)
            (const_int 0 [0]))) "include/adxintrin.h":69:10 785 {*setcc_qi}
     (expr_list:REG_DEAD (reg:CCC 17 flags)
        (nil)))
- set pseudo 88 to CF from flags, then some uninteresting insns that
don't modify flags, and finally:
(insn 17 15 18 2 (parallel [
            (set (reg:CCC 17 flags)
                (compare:CCC (plus:QI (reg:QI 88 [ _31 ])
                        (const_int -1 [0xffffffffffffffff]))
                    (reg:QI 88 [ _31 ])))
            (clobber (scratch:QI))
        ]) "include/adxintrin.h":69:10 350 {*addqi3_cconly_overflow_1}
     (expr_list:REG_DEAD (reg:QI 88 [ _31 ])
        (nil)))
to set CF in flags back to what we saved earlier.  The combiner just punts
trying to combine the 10, 17 and following addcarrydi (etc.) instruction,
because
  if (i1 && !can_combine_p (i1, i3, i0, NULL, i2, NULL, &i1dest, &i1src))
    {
      if (dump_file && (dump_flags & TDF_DETAILS))
        fprintf (dump_file, "Can't combine i1 into i3\n");
      undo_all ();
      return 0;
    }
fails - the 3 insns aren't all adjacent and
      || (! all_adjacent
          && (((!MEM_P (src)
                || ! find_reg_note (insn, REG_EQUIV, src))
               && modified_between_p (src, insn, i3))
src (flags hard register) is modified between the first and third insn - in
the second insn.

The following patch optimizes this by optimizing just the two insns,
10 and 17 above, i.e. save CF into pseudo, set CF from that pseudo, into
a nop.  The new define_insn_and_split matches how combine simplifies those
two together (except without the ix86_cc_mode change it was choosing CCmode
for the destination instead of CCCmode, so had to change that function too,
and also adjust costs so that combiner understand it is beneficial).

With this, all the testcases are optimized, so that the:
        setc    %dl
...
        addb    $-1, %dl
insns in between the ad[dc][lq] or s[ub]b[lq] instructions are all optimized
away (sure, if something would clobber flags in between they wouldn't, but
there is nothing that can be done about that).

2020-10-14  Jakub Jelinek  <jakub@redhat.com>

PR target/97387
* config/i386/i386.md (CC_CCC): New mode iterator.
(*setcc_qi_addqi3_cconly_overflow_1_<mode>): New
define_insn_and_split.
* config/i386/i386.c (ix86_cc_mode): Return CCCmode
for *setcc_qi_addqi3_cconly_overflow_1_<mode> pattern operands.
(ix86_rtx_costs): Return true and *total = 0;
for *setcc_qi_addqi3_cconly_overflow_1_<mode> pattern.  Use op0 and
op1 temporaries to simplify COMPARE checks.

* gcc.target/i386/pr97387-1.c: New test.
* gcc.target/i386/pr97387-2.c: New test.

libstdc++: Fix tests that fail with old std::string ABI

These two tests have started to fail with the old std::string ABI. The
scan-assembler-not checks fail because they match debug info, not code.

Adding -g0 to the test flags fixes them.

libstdc++-v3/ChangeLog:

* testsuite/21_strings/basic_string/modifiers/assign/char/move_assign_optim.cc:
Do not generate debug info.
* testsuite/21_strings/basic_string/modifiers/assign/wchar_t/move_assign_optim.cc:
Likewise.

Do not call range_of_ssa_name_with_loop_info with the loop tree root.

gcc/ChangeLog:

PR tree-optimization/97396
* gimple-range.cc (gimple_ranger::range_of_phi): Do not call
range_of_ssa_name_with_loop_info with the loop tree root.

gcc/testsuite/ChangeLog:

* gcc.dg/pr97396.c: New test.

More vect_get_and_check_slp_defs refactoring

This is another tiny piece in some bigger refactoring of
vect_get_and_check_slp_defs.  Split out a test that has nothing
to do with def types or commutation.

2020-10-14  Richard Biener  <rguenther@suse.de>

* tree-vect-slp.c (vect_get_and_check_slp_defs): Split out
test for compatible operand types.

Tigthen flag_pic processing in vxworks_override_options

This fixes spurious complaints about PIC mode not supported
from "gcc --help=...", on VxWorks without -mrtp. The spurious message
is emitted by vxworks_override_options, called with flag_pic == -1
when we're running for --help.

The change simply adjusts the check testing for "we're generating pic code"
to "flag_pic > 0" instead of just "flag_pic". We're not generating code at
all when reaching here with -1.

gcc/ChangeLog:

2020-10-14  Olivier Hainque  <hainque@adacore.com>

* config/vxworks.c (vxworks_override_options): Guard pic checks with
flag_pic > 0 instead of just flag_pic.