gcc.git
4 years agotree-optimization/97753 - fix SLP induction vect
Richard Biener [Mon, 9 Nov 2020 13:03:14 +0000 (14:03 +0100)]
tree-optimization/97753 - fix SLP induction vect

This fixes updating of the step vectors when filling up to group_size.

2020-11-09  Richard Biener  <rguenther@suse.de>

PR tree-optimization/97753
* tree-vect-loop.c (vectorizable_induction): Fill vec_steps
when CSEing inside the group.

* gcc.dg/vect/pr97753.c: New testcase.

4 years agotree-optimization/97746 - fix order of mask precision computes
Richard Biener [Mon, 9 Nov 2020 12:55:11 +0000 (13:55 +0100)]
tree-optimization/97746 - fix order of mask precision computes

This fixes the order of walking PHIs and stmts for BB mask
precision compute.

2020-11-09  Richard Biener  <rguenther@suse.de>

PR tree-optimization/97746
* tree-vect-patterns.c (vect_determine_precisions): First walk PHIs.

* gcc.dg/vect/bb-slp-pr97746.c: New testcase.

4 years agoc++: ADL refactor
Nathan Sidwell [Mon, 9 Nov 2020 12:59:59 +0000 (04:59 -0800)]
c++: ADL refactor

This refactors the ADL lookup.  It just so happens the refactoring
makes dropping modules in simpler :) We break apart the namespace and
class fn processing, and move scope iteration to an outer function.
It'll also become possible to find the same enum in multiple place, so
we need to handle that idempotently.

gcc/cp/
* cp-tree.h (LOOKUP_FOUND_P): Add ENUMERAL_TYPE.
* name-lookup.c (class name_lookup): Add comments.
(name_lookup::adl_namespace_only): Replace with ...
(name_lookup::adl_class_fns): ... this and ...
(name_lookup::adl_namespace_fns): ... this.
(name_lookup::adl_namespace): Deal with inline nests here.
(name_lookup::adl_class): Complete the type here.
(name_lookup::adl_type): Call broken-out enum ..
(name_lookup::adl_enum): New.  No need to call the namespace adl
if it is class-scope.
(name_lookup::search_adl): Iterate over collected scopes here.

4 years agoc++: Consistently expose singleton overloads
Nathan Sidwell [Fri, 6 Nov 2020 20:11:01 +0000 (12:11 -0800)]
c++: Consistently expose singleton overloads

This is a patch from my name-lookup overhaul.  I noticed the parser
and one path in name-lookup looked through an overload of a single
known decl.  It seems more consistent to do that in both paths through
name-lookup, and not in the parser itself.

gcc/cp/
* name-lookup.c (lookup_qualified_name): Expose an overload of a
singleton with known type.
(lookup_name_1): Just check the overload's type to expose it.
* parser.c (cp_parser_lookup_name): Do not do that check here.

4 years agoCSE VN_INFO calls in PRE and VN
Richard Biener [Mon, 9 Nov 2020 10:26:24 +0000 (11:26 +0100)]
CSE VN_INFO calls in PRE and VN

The following CSEs VN_INFO calls which nowadays are hashtable queries.

2020-11-09  Richard Biener  <rguenther@suse.de>

* tree-ssa-pre.c (get_representative_for): CSE VN_INFO calls.
(create_expression_by_pieces): Likewise.
(insert_into_preds_of_block): Likewsie.
(do_pre_regular_insertion): Likewsie.
* tree-ssa-sccvn.c (eliminate_dom_walker::eliminate_insert):
Likewise.
(eliminate_dom_walker::eliminate_stmt): Likewise.

4 years agoUse a per-edge PRE PHI translation cache
Richard Biener [Mon, 9 Nov 2020 10:09:01 +0000 (11:09 +0100)]
Use a per-edge PRE PHI translation cache

This changes the phi translation cache to be per edge which
pushes it off the profiling radar.  For larger testcases the
combined hashtable causes a load of cache misses and making it
per edge allows to shrink the entry further.

2020-11-09  Richard Biener  <rguenther@suse.de>

PR tree-optimization/97765
* tree-ssa-pre.c (bb_bitmap_sets::phi_translate_table): Add.
(PHI_TRANS_TABLE): New macro.
(phi_translate_table): Remove.
(expr_pred_trans_d::pred): Remove.
(expr_pred_trans_d::hash): Simplify.
(expr_pred_trans_d::equal): Likewise.
(phi_trans_add): Adjust.
(phi_translate): Likewise.  Remove hash-table expansion
detection and optimization.
(phi_translate_set): Allocate PHI_TRANS_TABLE here.
(init_pre): Adjsust.
(fini_pre): Free PHI_TRANS_TABLE.

4 years agoarm: [testcase] Better narrow some bfloat16 testcase
Andrea Corallo [Thu, 5 Nov 2020 08:57:03 +0000 (08:57 +0000)]
arm: [testcase] Better narrow some bfloat16 testcase

2020-11-05  Andrea Corallo  <andrea.corallo@arm.com>

* gcc.target/arm/simd/vld1_lane_bf16_1.c: Require target to
support and add -mfloat-abi=hard flag.
* gcc.target/arm/simd/vld1_lane_bf16_indices_1.c: Likewise.
* gcc.target/arm/simd/vld1q_lane_bf16_indices_1.c: Likewise.
* gcc.target/arm/simd/vst1_lane_bf16_1.c: Likewise.
* gcc.target/arm/simd/vst1_lane_bf16_indices_1.c: Likewise.
* gcc.target/arm/simd/vstq1_lane_bf16_indices_1.c: Likewise.

4 years agoEnable MOVDIRI, MOVDIR64B, CLDEMOTE and WAITPKG for march=tremont
Cui,Lili [Wed, 4 Nov 2020 06:20:31 +0000 (14:20 +0800)]
Enable MOVDIRI, MOVDIR64B, CLDEMOTE and WAITPKG for march=tremont

1. Enable MOVDIRI, MOVDIR64B, CLDEMOTE and WAITPKG for march=tremont
2. Move PREFETCHW from march=broadwell to march=silvermont.
3. Add PREFETCHWT1 to march=knl

gcc/ChangeLog:

2020-11-09  Lili Cui  <lili.cui@intel.com>

PR target/97685
* config/i386/i386.h:
(PTA_BROADWELL): Delete PTA_PRFCHW.
(PTA_SILVERMONT): Add PTA_PRFCHW.
(PTA_KNL): Add PTA_PREFETCHWT1.
(PTA_TREMONT): Add PTA_MOVDIRI, PTA_MOVDIR64B, PTA_CLDEMOTE and PTA_WAITPKG.
* doc/invoke.texi: Delete PREFETCHW for broadwell, skylake, knl, knm,
skylake-avx512, cannonlake, icelake-client, icelake-server, cascadelake,
cooperlake, tigerlake and sapphirerapids.
Add PREFETCHW for silvermont, goldmont, goldmont-plus and tremont.
Add XSAVEC and XSAVES for goldmont, goldmont-plus and tremont.
Add MOVDIRI, MOVDIR64B, CLDEMOTE and WAITPKG for tremont.
Add KEYLOCKER and HREST for alderlake.
Add AMX-BF16, AMX-TILE, AMX-INT8 and UINTR for sapphirerapids.
Add KEYLOCKER for tigerlake.

4 years agolibiberty/pex-win32.c: Initialize orig_err
Christophe Lyon [Mon, 9 Nov 2020 07:10:48 +0000 (07:10 +0000)]
libiberty/pex-win32.c: Initialize orig_err

Initializing orig_err avoids a warning: "may be used uninitialized".
See 97108.

2020-09-14  Torbjörn SVENSSON <torbjorn.svensson@st.com>
Christophe Lyon  <christophe.lyon@linaro.org>

libiberty/
* pex-win32.c (pex_win32_exec_child): Initialize orig_err.

4 years agoira: Recompute regstat as max_regno changes [PR97705]
Kewen Lin [Mon, 9 Nov 2020 02:35:21 +0000 (20:35 -0600)]
ira: Recompute regstat as max_regno changes [PR97705]

As PR97705 shows, the commit r11-4637 caused some dumping
comparison difference error on pass ira.  It exposed one
issue about the newly introduced function remove_scratches,
which can increase the largest pseudo reg number if it
succeeds, later some function will use the max_reg_num()
to get the latest max_regno, when iterating the numbers
we can access some data structures which are allocated as
the previous max_regno, some out of array bound accesses
can occur, the failure can be random since the values
beyond the array could be random.

This patch is to free/reinit/recompute the relevant data
structures that is regstat_n_sets_and_refs and reg_info_p
to ensure we won't access beyond some array bounds.

Bootstrapped/regtested on powerpc64le-linux-gnu P9 and
powerpc64-linux-gnu P8.

gcc/ChangeLog:

PR rtl-optimization/97705
* ira.c (ira): Refactor some regstat free/init/compute invocation
into lambda function regstat_recompute_for_max_regno, and call it
when max_regno increases as remove_scratches succeeds.

4 years agoDaily bump.
GCC Administrator [Mon, 9 Nov 2020 00:16:25 +0000 (00:16 +0000)]
Daily bump.

4 years agoObjective-C/C++ : Handle parsing @property 'class' attribute.
Iain Sandoe [Wed, 4 Nov 2020 23:52:12 +0000 (23:52 +0000)]
Objective-C/C++ : Handle parsing @property 'class' attribute.

This attribute states that a property is one manipulated by class
methods (it requires a static variable and the setter and getter
must be provided explicitly, they cannot be @synthesized).

gcc/c-family/ChangeLog:

* c-common.h (OBJC_IS_PATTR_KEYWORD): Add class to the list
of keywords accepted in @property attribute contexts.
* c-objc.h (enum objc_property_attribute_group): Add
OBJC_PROPATTR_GROUP_CLASS.
(enum objc_property_attribute_kind): Add
OBJC_PROPERTY_ATTR_CLASS.

gcc/cp/ChangeLog:

* parser.c (cp_parser_objc_at_property_declaration): Handle
class keywords in @property attribute context.

gcc/objc/ChangeLog:

* objc-act.c (objc_prop_attr_kind_for_rid): Handle class
attribute.
(objc_add_property_declaration): Likewise.
* objc-act.h (PROPERTY_CLASS): Record class attribute state.

gcc/testsuite/ChangeLog:

* obj-c++.dg/property/at-property-4.mm: Test handling class
attributes.
* objc.dg/property/at-property-4.m: Likewise.

4 years agotestsuite, Darwin, PPC : Skip zero scratch regs tests.
Iain Sandoe [Sun, 8 Nov 2020 09:34:36 +0000 (09:34 +0000)]
testsuite, Darwin, PPC : Skip zero scratch regs tests.

XFAIL-ing these is not sufficient, unfortunately, we need to
skip them completely.

gcc/testsuite/ChangeLog:

* c-c++-common/zero-scratch-regs-10.c: Skip for powerpc
Darwin.
* c-c++-common/zero-scratch-regs-11.c: Likewise.
* c-c++-common/zero-scratch-regs-8.c: Likewise.
* c-c++-common/zero-scratch-regs-9.c: Likewise.

4 years agotestsuite, Darwin, X86 : Add target requires native tls to test.
Iain Sandoe [Sun, 8 Nov 2020 09:09:32 +0000 (09:09 +0000)]
testsuite, Darwin, X86 : Add target requires native tls to test.

The builtin_thread_pointer test does not work for emulated TLS.
Add a target requires to cover this.

gcc/testsuite/ChangeLog:

* gcc.target/i386/builtin_thread_pointer.c: Require native TLS.

4 years agors6000: Fix bootstrap after r11-4793.
David Edelsohn [Sun, 8 Nov 2020 01:38:38 +0000 (20:38 -0500)]
rs6000: Fix bootstrap after r11-4793.

The patch omitted a change for rs6000.c, fixed thus.

gcc/ChangeLog:

* config/rs6000/rs6000.c (rs6000_mangle_decl_assembler_name): Change
DECL_IS_BUILTIN -> DECL_IS_UNDECLARED_BUILTIN.

4 years agoDaily bump.
GCC Administrator [Sun, 8 Nov 2020 00:16:31 +0000 (00:16 +0000)]
Daily bump.

4 years agotestsuite: Fix Wimplicit-fallthrough-20.c.
Marek Polacek [Sat, 7 Nov 2020 18:28:21 +0000 (13:28 -0500)]
testsuite: Fix Wimplicit-fallthrough-20.c.

The r11-4813 patch removed "ignored" from the dg-warnings in this test,
causing this test to fail when compiled as C++.

gcc/testsuite/ChangeLog:

* c-c++-common/Wimplicit-fallthrough-20.c: Adjust dg-warning.

4 years agolibcpp: Update cpp_wcwidth() to Unicode 13.0.0
Lewis Hyatt [Sat, 7 Nov 2020 14:36:42 +0000 (09:36 -0500)]
libcpp: Update cpp_wcwidth() to Unicode 13.0.0

generated_cpp_wcwidth.h was regenerated using Unicode 13.0.0 data files. No
material changes to the parsing scripts (either GCC- or glibc-sourced) were
necessary; glibc's utf8_gen.py was tweaked slightly by glibc and matched here.

contrib/ChangeLog:

* unicode/EastAsianWidth.txt: Update to Unicode 13.0.0.
* unicode/PropList.txt: Likewise.
* unicode/README: Likewise.
* unicode/UnicodeData.txt: Likewise.
* unicode/from_glibc/unicode_utils.py: Update to latest glibc version.
* unicode/from_glibc/utf8_gen.py: Likewise.

libcpp/ChangeLog:

* generated_cpp_wcwidth.h: Regenerated from Unicode 13.0.0 data.

4 years agoObjective-C/C++ (C-family) : Add missing 'atomic' property attribute.
Iain Sandoe [Mon, 2 Nov 2020 21:12:38 +0000 (21:12 +0000)]
Objective-C/C++ (C-family) : Add missing 'atomic' property attribute.

This is the default, but it is still legal in user code and therefore
we should handle it in parsing.  Fix whitespace issues in the lines
affected.

gcc/c-family/ChangeLog:

* c-common.c (c_common_reswords): Add 'atomic' property
attribute.
* c-common.h (enum rid): Add RID_PROPATOMIC for atomic
property attributes.

gcc/objc/ChangeLog:

* objc-act.c (objc_prop_attr_kind_for_rid): Handle
RID_PROPATOMIC.

gcc/testsuite/ChangeLog:

* obj-c++.dg/property/at-property-4.mm: Test atomic property
attribute.
* objc.dg/property/at-property-4.m: Likewise.

4 years agoObjective-C : Implement NSObject attribute.
Iain Sandoe [Sat, 24 Oct 2020 14:51:46 +0000 (15:51 +0100)]
Objective-C : Implement NSObject attribute.

This attribute allows pointers to be marked as pointers to
an NSObject-compatible object.  This allows for additional
checking of assignment etc. when refering to pointers to
opaque types.

gcc/c-family/ChangeLog:

* c-attribs.c (handle_nsobject_attribute): New.
* c.opt: Add WNSObject-attribute.

gcc/objc/ChangeLog:

* objc-act.c (objc_compare_types): Handle NSObject type
attributes.
(objc_type_valid_for_messaging): Likewise.

gcc/testsuite/ChangeLog:

* obj-c++.dg/attributes/nsobject-01.mm: New test.
* objc.dg/attributes/nsobject-01.m: New test.

4 years agoFix Ada build failure for the SuSE PowerPC64/Linux compiler
Eric Botcazou [Sat, 7 Nov 2020 10:07:11 +0000 (11:07 +0100)]
Fix Ada build failure for the SuSE PowerPC64/Linux compiler

gcc/ada/ChangeLog:
* gcc-interface/Makefile.in: Force target_cpu to powerpc if the
nominal target is powerpc64-suse-linux.

4 years agotestsuite, Darwin, PPC : XFAIL zero-scratch-regs tests.
Iain Sandoe [Sat, 7 Nov 2020 09:20:54 +0000 (09:20 +0000)]
testsuite, Darwin, PPC : XFAIL zero-scratch-regs tests.

These tests fail because of an unimplemented 'sorry'; there
is no plan to implement this in the short term, so XFAILing
the tests to reduce noise.

gcc/testsuite/ChangeLog:

* c-c++-common/zero-scratch-regs-10.c: XFAIL for
powerpc-darwin.
* c-c++-common/zero-scratch-regs-11.c: Likewise.
* c-c++-common/zero-scratch-regs-8.c: Likewise.
* c-c++-common/zero-scratch-regs-9.c: Likewise.

4 years agoAda : Fix bootstrap after r11-4793.
Iain Sandoe [Sat, 7 Nov 2020 08:43:37 +0000 (08:43 +0000)]
Ada : Fix bootstrap after r11-4793.

The patch omitted a change for Ada, fixed thus.

gcc/ada/ChangeLog:

* gcc-interface/misc.c (gnat_printable_name): Change
DECL_IS_BUILTIN -> DECL_IS_UNDECLARED_BUILTIN.

4 years agoC Parser: Implement mixing of labels and code.
Martin Uecker [Fri, 6 Nov 2020 23:48:33 +0000 (00:48 +0100)]
C Parser: Implement mixing of labels and code.

Implement mixing of labels and code as adopted for C2X
and process some std-attributes on labels.

2020-11-06  Martin Uecker  <muecker@gwdg.de>

gcc/
* doc/extend.texi: Document mixing labels and code.
* doc/invoke.texi: Likewise.

gcc/c/
* c-parser.c (c_parser_label): Implement mixing of labels and code.
(c_parser_all_labels): Likewise.

gcc/testsuite/
* c-c++-common/attr-fallthrough-2.c: Update compiler flags.
* c-c++-common/Wimplicit-fallthrough-20.c: Adapt test.
* gcc.dg/20031223-1.c: Update compiler flags and adapt test.
* gcc.dg/c11-labels-1.c: New test.
* gcc.dg/c11-labels-2.c: New test.
* gcc.dg/c11-labels-3.c: New test.
* gcc.dg/c2x-attr-syntax-3.c: Adapt test.
* gcc.dg/c2x-labels-1.c: New test.
* gcc.dg/c2x-labels-2.c: New test.
* gcc.dg/c2x-labels-3.c: New test.
* gcc.dg/decl-9.c: Update compiler flags and add error.
* gcc.dg/gomp/barrier-2.c: Update compiler flags and add warning.
* gcc.dg/gomp/declare-simd-5.c: Update compiler flags and adapt test.
* gcc.dg/gomp/declare-variant-2.c: Update compiler flags and add error.
* gcc.dg/label-compound-stmt-1.c: Update compiler flags.
* gcc.dg/parse-decl-after-label.c: Update compiler flags.

4 years agolibsupc++: Make the destructor parameter to `__cxa_thread_atexit()` use the `__thisca...
Liu Hao [Thu, 8 Oct 2020 02:26:13 +0000 (10:26 +0800)]
libsupc++: Make the destructor parameter to `__cxa_thread_atexit()` use the `__thiscall` calling convention for i686-w64-mingw32

The mingw-w64 implementations of `__cxa_thread_atexit()` and `__cxa_atexit()` have been
using `__thiscall` since two years ago. Using the default calling convention (which is
`__cdecl`) causes crashes as explained in PR83562.

Calling conventions have no effect on x86_64-w64-mingw32.

Reference: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83562
Reference: https://sourceforge.net/p/mingw-w64/mingw-w64/ci/master/tree/mingw-w64-crt/crt/cxa_thread_atexit.c
Reference: https://sourceforge.net/p/mingw-w64/mingw-w64/ci/f3e0fbb40cbc9f8821db8bd8a0c4dae8ff671e9f/
Reference: https://github.com/msys2/MINGW-packages/issues/7071
Signed-off-by: Liu Hao <lh_mouse@126.com>
    2020-10-08  Liu Hao  <lh_mouse@126.com>

libstdc++-v3:
* libsupc++/cxxabi.h: (__cxa_atexit): mark with _GLIBCXX_CDTOR_CALLABI
(__cxa_thread_atexit): ditto
* libsupc++/atexit_thread.cc: (__cxa_atexit): mark with
_GLIBCXX_CDTOR_CALLABI
(__cxa_thread_atexit): ditto
(elt): ditto

4 years agoDaily bump.
GCC Administrator [Sat, 7 Nov 2020 00:16:39 +0000 (00:16 +0000)]
Daily bump.

4 years agors6000: Don't use operands[] for temporaries in define_expand
Segher Boessenkool [Fri, 2 Oct 2020 00:06:56 +0000 (00:06 +0000)]
rs6000: Don't use operands[] for temporaries in define_expand

In ac001f5ce604 Alan fixed my thinko using operands that do not refer
to anything mentioned in the RTL pattern.  Instead, it just uses fresh
new local rtxes for those.

This patch takes that a tiny bit further: it uses local rtx for all
temporaries used in the expanders.  As a bonus that simplifies the code
a tiny bit as well.

2020-11-06  Segher Boessenkool  <segher@kernel.crashing.org>

* config/rs6000/rs6000.md (@tablejump<mode>_normal): Don't abuse
operands[].
(@tablejump<mode>_nospec): Ditto.

4 years agoMAINTAINERS: Update my email address.
Martin Uecker [Fri, 6 Nov 2020 23:28:01 +0000 (00:28 +0100)]
MAINTAINERS: Update my email address.

2020-11-07  Martin Uecker  <muecker@gwdg.de>

* MAINTAINERS: Update my email address.

4 years agors6000: Use the correct minimized testcase
Peter Bergner [Fri, 6 Nov 2020 22:49:37 +0000 (16:49 -0600)]
rs6000: Use the correct minimized testcase

Use the correct minimized test case source rather than the large test
source.

gcc/testsuite/
* gcc.target/powerpc/pr64505.c: Run everywhere.  Use correct minimized
test case.

4 years agors6000: Fix default alignment ABI break caused by MMA base support
Peter Bergner [Fri, 6 Nov 2020 23:00:49 +0000 (17:00 -0600)]
rs6000: Fix default alignment ABI break caused by MMA base support

As part of the MMA base support, we incremented BIGGEST_ALIGNMENT in
order to align the __vector_pair and __vector_quad types to 256 and 512
bytes respectively.  This had the unintended effect of changing the
default alignment used by __attribute__ ((__aligned__)) which causes
an ABI break because of some dodgy code in GLIBC's struct pthread.
The fix is to revert the BIGGEST_ALIGNMENT change and to force the
alignment on the type itself rather than the mode used by the type.

2020-11-06  Peter Bergner  <bergner@linux.ibm.com>

gcc/
* config/rs6000/rs6000.h (BIGGEST_ALIGNMENT): Revert previous commit
so as not to break the ABI.
* config/rs6000/rs6000-call.c (rs6000_init_builtins): Set the ABI
mandated alignment for __vector_pair and __vector_quad types.

gcc/testsuite/
* gcc.target/powerpc/mma-alignment.c: New test.

4 years agoFix stack pointer handling in ms_hook_prologue functions for i386 target.
Jeff Law [Fri, 6 Nov 2020 22:38:00 +0000 (17:38 -0500)]
Fix stack pointer handling in ms_hook_prologue functions for i386 target.

gcc/
PR target/91489
* config/i386/i386.md (simple_return): Also check
for ms_hook_prologue function attribute.
* config/i386/i386.c (ix86_can_use_return_insn_p):
Also check for ms_hook_prologue function attribute.
* config/i386/i386-protos.h (ix86_function_ms_hook_prologue): Declare.

gcc/testsuite
PR target/91489
* gcc.target/i386/ms_hook_prologue.c: Expand testcase
to reproduce PR target/91489 issue.

4 years agors6000: Fix TARGET_POWERPC64 vs. TARGET_64BIT confusion
Segher Boessenkool [Fri, 6 Nov 2020 12:50:35 +0000 (12:50 +0000)]
rs6000: Fix TARGET_POWERPC64 vs. TARGET_64BIT confusion

I gave Ke Wen bad advice, luckily David corrected me: it is true that we
cannot use TARGET_POWERPC64 on many 32-bit OSes, since either the kernel
or userland does not save the top half of the 64-bit integer registers,
but we do not have to care about that in separate patterns or related
code.  The flag is automatically not enabled by default on targets that
do not handle this correctly.

This patch fixes it.

Segher

2020-11-06  Segher Boessenkool  <segher@kernel.crashing.org>

PR target/96933
* config/rs6000/rs6000.c (rs6000_expand_vector_init): Use
TARGET_POWERPC64 instead of TARGET_64BIT.

4 years agobuiltins: Add DFP signaling NaN built-in functions
Joseph Myers [Fri, 6 Nov 2020 21:55:19 +0000 (21:55 +0000)]
builtins: Add DFP signaling NaN built-in functions

Add built-in functions __builtin_nansd32, __builtin_nansd64 and
__builtin_nansd128 to return signaling NaNs of decimal floating-point
types, analogous to the functions already present for binary
floating-point types.

This patch, independent of
<https://gcc.gnu.org/pipermail/gcc-patches/2020-October/557136.html>
(pending review), is in preparation for adding the <float.h> macros
for such signaling NaNs that are in C2x, analogous to the macros for
other types that are in that patch.

Bootstrapped with no regressions for x86_64-pc-linux-gnu.  Also ran
the new tests for powerpc64le-linux-gnu to confirm they do work in the
case (hardware DFP) where floating-point exceptions are supported for
DFP.

gcc/
2020-11-06  Joseph Myers  <joseph@codesourcery.com>

* builtins.def (BUILT_IN_NANSD32, BUILT_IN_NANSD64)
(BUILT_IN_NANSD128): New built-in functions.
* fold-const-call.c (fold_const_call): Handle the new built-in
functions.
* doc/extend.texi (__builtin_nansd32, __builtin_nansd64)
(__builtin_nansd128): Document.
* doc/sourcebuild.texi (Effective-Target Keywords): Document
fenv_exceptions_dfp.

gcc/testsuite/
2020-11-06  Joseph Myers  <joseph@codesourcery.com>

* lib/target-supports.exp
(check_effective_target_fenv_exceptions_dfp): New.
* gcc.dg/dfp/builtin-snan-1.c, gcc.dg/dfp/builtin-snan-2.c: New
tests.

4 years agoc++: Small tweak to can_convert_eh [PR81660]
Marek Polacek [Fri, 6 Nov 2020 02:46:06 +0000 (21:46 -0500)]
c++: Small tweak to can_convert_eh [PR81660]

While messing with check_handlers_1, I spotted this bug report which
complains that we don't warn about the case when we have two duplicated
handlers of type int.  can_convert_eh implements [except.handle] and
that says: A handler is a match for an exception object of type E if
 - The handler is of type cv T or cv T& and E and T are the same type
   (ignoring the top-level cv-qualifiers), or [...]

but we don't implement this bullet properly for non-class types.  The
fix therefore seems pretty obvious.  Also change the return type to
bool when we're only returning yes/no.

gcc/cp/ChangeLog:

PR c++/81660
* except.c (can_convert_eh): Change the return type to bool.  If
the type TO and FROM are the same, return true.

gcc/testsuite/ChangeLog:

PR c++/81660
* g++.dg/warn/Wexceptions3.C: New test.
* g++.dg/eh/pr42859.C: Add dg-warning.
* g++.dg/torture/pr81659.C: Likewise.

4 years agoImprove uninitialized warning with value range info
Bin Cheng [Fri, 6 Nov 2020 21:19:40 +0000 (16:19 -0500)]
Improve uninitialized warning with value range info

Function use_pred_not_overlap_with_undef_path_pred of
pass_late_warn_uninitialized
checks if predicate of variable use overlaps with predicate of undefined
control flow path.
For now, it only checks ssa_var comparing against constant, this can be
improved where
ssa_var compares against another ssa_var with value range info, as described in
comment:

+         /* Check value range info of rhs, do following transforms:
+              flag_var < [min, max]  ->  flag_var < max
+              flag_var > [min, max]  ->  flag_var > min
+
+            We can also transform LE_EXPR/GE_EXPR to LT_EXPR/GT_EXPR:
+              flag_var <= [min, max] ->  flag_var < [min, max+1]
+              flag_var >= [min, max] ->  flag_var > [min-1, max]
+            if no overflow/wrap.  */

gcc/

* tree-ssa-uninit.c (find_var_cmp_const): New function.
(use_pred_not_overlap_with_undef_path_pred): Call above.

4 years agolibstdc++: Fix symbol version conflict in linker script
Jonathan Wakely [Fri, 6 Nov 2020 19:53:36 +0000 (19:53 +0000)]
libstdc++: Fix symbol version conflict in linker script

The change in r11-4748-50b840ac5e1d6534e345c3fee9a97ae45ced6bc7 causes
a build error on Solaris, due to the new explicit instantiation matching
patterns for two different symbol versions.

libstdc++-v3/ChangeLog:

* config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Tighten up patterns
for basic_stringbuf that refer to __xfer_bufptrs.

4 years agoObjective-C/C++ : Allow visibility prefix attributes on interfaces.
Iain Sandoe [Sun, 25 Oct 2020 17:34:29 +0000 (17:34 +0000)]
Objective-C/C++ : Allow visibility prefix attributes on interfaces.

This passes visibiliy through without warning (so that, for example,
__attribute__((__visibility("default"))) does not result in any
diagnostic).

gcc/objc/ChangeLog:

* objc-act.c (start_class): Accept visibility attributes
without warning.

4 years agoObjective-C/C++ (parsers) : Update @property attribute parsing.
Iain Sandoe [Sat, 31 Oct 2020 20:53:34 +0000 (20:53 +0000)]
Objective-C/C++ (parsers) : Update @property attribute parsing.

At present, we are missing parsing and checking for around
half of the property attributes in use.  The existing ad hoc scheme
for the parser's communication with the Objective C validation
is not suitable for extending to cover all the missing cases.

Additionally:

1/ We were declaring errors in two cases that the reference
   implementation warns (or is silent).

   I've elected to warn for both those cases, (Wattributes) it
   could be that we should implement Wobjc-xxx-property warning
   masks (TODO).

2/ We were emitting spurious complaints about missing property
   attributes when these were not being parsed because we gave
   up on the first syntax error.

3/ The quality of the diagnostic locations was poor (that's
   true for much of Objective-C, we will have to improve it as
   we modernise areas).

We continue to attempt to keep the code, warning and error output
similar (preferably identical output) between the C and C++ front
ends.

The interface to the Objective-C-specific parts of the parsing is
simplified to a vector of parsed (but not fully-checked) property
attributes, this will simplify the addition of new attributes.

gcc/c-family/ChangeLog:

* c-objc.h (enum objc_property_attribute_group): New
(enum objc_property_attribute_kind): New.
(OBJC_PROPATTR_GROUP_MASK): New.
(struct property_attribute_info): Small class encapsulating
parser output from property attributes.
(objc_prop_attr_kind_for_rid): New
(objc_add_property_declaration): Simplify interface.
* stub-objc.c (enum rid): Dummy type.
(objc_add_property_declaration): Simplify interface.
(objc_prop_attr_kind_for_rid): New.

gcc/c/ChangeLog:

* c-parser.c (c_parser_objc_at_property_declaration):
Improve parsing fidelity. Associate better location info
with @property attributes.  Clean up the interface to
objc_add_property_declaration ().

gcc/cp/ChangeLog:

* parser.c (cp_parser_objc_at_property_declaration):
Improve parsing fidelity. Associate better location info
with @property attributes.  Clean up the interface to
objc_add_property_declaration ().

gcc/objc/ChangeLog:

* objc-act.c (objc_prop_attr_kind_for_rid): New.
(objc_add_property_declaration): Adjust to consume the
parser output using a vector of parsed attributes.

gcc/testsuite/ChangeLog:

* obj-c++.dg/property/at-property-1.mm: Adjust expected
diagnostics.
* obj-c++.dg/property/at-property-29.mm: Likewise.
* obj-c++.dg/property/at-property-4.mm: Likewise.
* obj-c++.dg/property/property-neg-2.mm: Likewise.
* objc.dg/property/at-property-1.m: Likewise.
* objc.dg/property/at-property-29.m: Likewise.
* objc.dg/property/at-property-4.m: Likewise.
* objc.dg/property/at-property-5.m: Likewise.
* objc.dg/property/property-neg-2.m: Likewise.

4 years agoc++: Propagate attributes to clones in duplicate_decls [PR67453]
Jakub Jelinek [Fri, 6 Nov 2020 19:33:39 +0000 (20:33 +0100)]
c++: Propagate attributes to clones in duplicate_decls [PR67453]

On the following testcase where the cdtor attributes aren't on the
in-class declaration but on an out-of-class definition, the cdtors
have their clones created from the in-class declaration, and later on
duplicate_decls updates attributes on the abstract cdtors, but nothing
propagates them to the clones.

2020-11-06  Jakub Jelinek  <jakub@redhat.com>

PR c++/67453
* decl.c (duplicate_decls): Propagate DECL_ATTRIBUTES and
DECL_PRESERVE_P from olddecl to its clones if any.

* g++.dg/ext/attr-used-2.C: New test.

4 years agoDarwin: Darwin 20 is to be macOS 11 (Big Sur).
Iain Sandoe [Fri, 31 Jul 2020 20:05:28 +0000 (21:05 +0100)]
Darwin: Darwin 20 is to be macOS 11 (Big Sur).

As per Nigel Tufnel's assertion "... this one goes to 11".

The various parts of the code that deal with mapping Darwin versions
to macOS (X) versions need updating to deal with  a major version of
11.

So now we have, for example:

Darwin  4 => macOS (X) 10.0

Darwin 14 => macOS (X) 10.10
...
Darwin 19 => macOS (X) 10.15

Darwin 20 => macOS  11.0

Because of the historical duplication of the "10" in macOSX 10.xx and
the number of tools that expect this, it is likely that system tools will
allow macos11.0 and/or macosx11.0 (despite that the latter makes little
sense).

Update the link test to cover Catalina (Darwin19/10.15) and
Big Sur (Darwin20/11.0).

gcc/ChangeLog:

* config/darwin-c.c: Allow for Darwin20 to correspond to macOS 11.
* config/darwin-driver.c: Likewise.

gcc/testsuite/ChangeLog:

* gcc.dg/darwin-minversion-link.c: Allow for Darwin19 (macOS 10.15)
and Darwin20 (macOS 11.0).

4 years agorework PRE PHI translation cache
Richard Biener [Fri, 6 Nov 2020 15:57:05 +0000 (16:57 +0100)]
rework PRE PHI translation cache

Turns out its size and time requirements can be stripped down
dramatically.

2020-11-06  Richard Biener  <rguenther@suse.de>

* tree-ssa-pre.c (expr_pred_trans_d): Modify so elements
are embedded rather than allocated.  Remove hashval member,
make all members integers.
(phi_trans_add): Adjust accordingly.
(phi_translate): Likewise.  Deal with re-allocation
of the table.

4 years agoCombine new calculated ranges with existing range.
Andrew MacLeod [Fri, 6 Nov 2020 19:14:46 +0000 (14:14 -0500)]
Combine new calculated ranges with existing range.

When a range is recalculated, retain what was previously known as IL changes
can produce different results from un-executed code.   This also paves
the way for external injection of ranges.

gcc/
PR tree-optimization/97737
PR tree-optimization/97741
* gimple-range.cc: (gimple_ranger::range_of_stmt): Intersect newly
calculated ranges with the existing known global range.
gcc/testsuite/
* gcc.dg/pr97737.c: New.
* gcc.dg/pr97741.c: New.

4 years agoAdd PC as control register
Darius Galis [Fri, 6 Nov 2020 18:54:20 +0000 (11:54 -0700)]
Add PC as control register

gcc/
* config/rx/rx.md (CTRLREG_PC): Add.
* config/rx/rx.c (CTRLREG_PC): Add
(rx_expand_builtin_mvtc): Add warning: PC register cannot
be used as dest.

4 years agocore: Rename DECL_IS_BUILTIN -> DECL_IS_UNDECLARED_BUILTIN
Nathan Sidwell [Fri, 6 Nov 2020 17:59:21 +0000 (09:59 -0800)]
core: Rename DECL_IS_BUILTIN -> DECL_IS_UNDECLARED_BUILTIN

In cleaning up C++'s handling of hidden decls, I renamed its
DECL_BUILTIN_P, which checks for loc == BUILTINS_LOCATION to
DECL_UNDECLARED_BUILTIN_P, because the location gets updated, if user
source declares the builtin, and the predicate no longer holds.  The
original name was confusing me.  (The builtin may still retain builtin
properties in the redeclaration, and other predicates can still detect
that.)

I discovered that tree.h had its own variant 'DECL_IS_BUILTIN', which
behaves in (almost) the same manner.  And therefore has the same
mutating behaviour.

This patch deletes the C++ one, and renames tree.h's to
DECL_IS_UNDECLARED_BUILTIN, to emphasize its non-constantness.  I
guess _IS_ wins over _P

gcc/
* tree.h (DECL_IS_BUILTIN): Rename to ...
(DECL_IS_UNDECLARED_BUILTIN): ... here.  No need to use SOURCE_LOCUS.
* calls.c (maybe_warn_alloc_args_overflow): Adjust for rename.
* cfgexpand.c (pass_expand::execute): Likewise.
* dwarf2out.c (base_type_die, is_naming_typedef_decl): Likewise.
* godump.c (go_decl, go_type_decl): Likewise.
* print-tree.c (print_decl_identifier): Likewise.
* tree-pretty-print.c (dump_generic_node): Likewise.
* tree-ssa-ccp.c (pass_post_ipa_warn::execute): Likewise.
* xcoffout.c (xcoff_assign_fundamental_type_number): Likewise.
gcc/c-family/
* c-ada-spec.c (collect_ada_nodes): Rename
DECL_IS_BUILTIN->DECL_IS_UNDECLARED_BUILTIN.
(collect_ada_node): Likewise.
(dump_forward_type): Likewise.
* c-common.c (set_underlying_type): Rename
DECL_IS_BUILTIN->DECL_IS_UNDECLARED_BUILTIN.
(user_facing_original_type, c_common_finalize_early_debug): Likewise.
gcc/c/
* c-decl.c (diagnose_mismatched_decls): Rename
DECL_IS_BUILTIN->DECL_IS_UNDECLARED_BUILTIN.
(warn_if_shadowing, implicitly_declare, names_builtin_p)
(collect_source_refs): Likewise.
* c-typeck.c (inform_declaration, inform_for_arg)
(convert_for_assignment): Likewise.
gcc/cp/
* cp-tree.h (DECL_UNDECLARED_BUILTIN_P): Delete.
* cp-objcp-common.c (names_bultin_p): Rename
DECL_IS_BUILTIN->DECL_IS_UNDECLARED_BUILTIN.
* decl.c (decls_match): Likewise.  Replace
DECL_UNDECLARED_BUILTIN_P with DECL_IS_UNDECLARED_BUILTIN.
(duplicate_decls): Likewise.
* decl2.c (collect_source_refs): Likewise.
* name-lookup.c (anticipated_builtin_p, print_binding_level)
(do_nonmember_using_decl): Likewise.
* pt.c (builtin_pack_fn_p): Likewise.
* typeck.c (error_args_num): Likewise.
gcc/lto/
* lto-symtab.c (lto_symtab_merge_decls_1): Rename
DECL_IS_BUILTIN->DECL_IS_UNDECLARED_BUILTIN.
gcc/go/
* go-gcc.cc (Gcc_backend::call_expression): Rename
DECL_IS_BUILTIN->DECL_IS_UNDECLARED_BUILTIN.
libcc1/
* libcc1plugin.cc (address_rewriter): Rename
DECL_IS_BUILTIN->DECL_IS_UNDECLARED_BUILTIN.
* libcp1plugin.cc (supplement_binding): Likewise.

4 years agoaarch64: Use intrinsics for upper saturating shift right
David Candler [Fri, 6 Nov 2020 17:53:03 +0000 (17:53 +0000)]
aarch64: Use intrinsics for upper saturating shift right

The use of vqshrn_high_n_s32 was triggering an unneeded register move, because
sqshrn2 is destructive but was declared as inline assembly in arm_neon.h. This
patch implements sqshrn2 and uqshrn2 as actual intrinsics which do not trigger
the unnecessary move, along with new tests to cover them.

gcc/ChangeLog

2020-11-06  David Candler  <david.candler@arm.com>

* config/aarch64/aarch64-builtins.c
(TYPES_SHIFT2IMM): Add define.
(TYPES_SHIFT2IMM_UUSS): Add define.
(TYPES_USHIFT2IMM): Add define.
* config/aarch64/aarch64-simd.md
(aarch64_<sur>q<r>shr<u>n2_n<mode>): Add new insn for upper saturating shift right.
* config/aarch64/aarch64-simd-builtins.def: Add intrinsics.
* config/aarch64/arm_neon.h:
(vqrshrn_high_n_s16): Expand using intrinsic rather than inline asm.
(vqrshrn_high_n_s32): Likewise.
(vqrshrn_high_n_s64): Likewise.
(vqrshrn_high_n_u16): Likewise.
(vqrshrn_high_n_u32): Likewise.
(vqrshrn_high_n_u64): Likewise.
(vqrshrun_high_n_s16): Likewise.
(vqrshrun_high_n_s32): Likewise.
(vqrshrun_high_n_s64): Likewise.
(vqshrn_high_n_s16): Likewise.
(vqshrn_high_n_s32): Likewise.
(vqshrn_high_n_s64): Likewise.
(vqshrn_high_n_u16): Likewise.
(vqshrn_high_n_u32): Likewise.
(vqshrn_high_n_u64): Likewise.
(vqshrun_high_n_s16): Likewise.
(vqshrun_high_n_s32): Likewise.
(vqshrun_high_n_s64): Likewise.

gcc/testsuite/ChangeLog

2020-11-06  David Candler  <david.candler@arm.com>

* gcc.target/aarch64/advsimd-intrinsics/vqrshrn_high_n.c: New testcase.
* gcc.target/aarch64/advsimd-intrinsics/vqrshrun_high_n.c: Likewise.
* gcc.target/aarch64/advsimd-intrinsics/vqshrn_high_n.c: Likewise.
* gcc.target/aarch64/advsimd-intrinsics/vqshrun_high_n.c: Likewise.
* gcc.target/aarch64/narrow_high-intrinsics.c: Update expected assembler
for sqshrun2, sqrshrun2, sqshrn2, uqshrn2, sqrshrn2 and uqrshrn2.

4 years agolibcpp: Provide date routine
Nathan Sidwell [Fri, 6 Nov 2020 16:53:31 +0000 (08:53 -0800)]
libcpp: Provide date routine

Joseph pointed me at cb_get_source_date_epoch, which allows repeatable
builds and solves a FIXME I had on the modules branch.  Unfortunately
it's used exclusively to generate __DATE__ and __TIME__ values, which
fallback to using a time(2) call.  It'd be nicer if the preprocessor
made whatever time value it determined available to the rest of the
compiler.  So this patch adds a new cpp_get_date function, which
abstracts the call to the get_source_date_epoch hook, or uses time
directly.  The value is cached.  Thus the timestamp I end up putting
on CMI files matches __DATE__ and __TIME__ expansions.  That seems
worthwhile.

libcpp/
* include/cpplib.h (enum class CPP_time_kind): New.
(cpp_get_date): Declare.
* internal.h (struct cpp_reader): Replace source_date_epoch with
time_stamp and time_stamp_kind.
* init.c (cpp_create_reader): Initialize them.
* macro.c (_cpp_builtin_macro_text): Use cpp_get_date.
(cpp_get_date): Broken out from _cpp_builtin_macro_text and
genericized.

4 years agoaarch64: Support permutes on unpacked SVE vectors
Richard Sandiford [Fri, 6 Nov 2020 16:49:28 +0000 (16:49 +0000)]
aarch64: Support permutes on unpacked SVE vectors

This patch adds support for permuting unpacked SVE vectors using:

- DUP
- EXT
- REV[BHW]
- REV
- TRN[12]
- UZP[12]
- ZIP[12]

This involves rewriting the REV[BHW] permute code so that the inputs
and outputs of the insn pattern have the same mode as the vectors
being permuted.  This is different from the ACLE form, where the
reversal happens within individual elements rather than within
groups of multiple elements.

The patch does not add a conditional version of REV[BHW].  I'll come
back to that once we have partial-vector comparisons and selects.

The patch is really just enablement, adding an extra tool to the
toolbox.  It doesn't bring any significant vectorisation opportunities
on its own.  However, the patch does have one artificial example that
is now vectorised in a better way than before.

gcc/
* config/aarch64/aarch64-modes.def (VNx2BF, VNx4BF): Adjust nunits
and alignment based on the current VG.
* config/aarch64/iterators.md (SVE_ALL, SVE_24, SVE_2, SVE_4): Add
partial SVE BF modes.
(UNSPEC_REVBHW): New unspec.
(Vetype, Vesize, Vctype, VEL, Vel, vwcore, V_INT_CONTAINER)
(v_int_container, VPRED, vpred): Handle partial SVE BF modes.
(container_bits, Vcwtype): New mode attributes.
* config/aarch64/aarch64-sve.md
(@aarch64_sve_revbhw_<SVE_ALL:mode><PRED_HSD:mode>): New pattern.
(@aarch64_sve_dup_lane<mode>): Extended from SVE_FULL to SVE_ALL.
(@aarch64_sve_rev<mode>, @aarch64_sve_<perm_insn><mode>): Likewise.
(@aarch64_sve_ext<mode>): Likewise.
* config/aarch64/aarch64.c (aarch64_classify_vector_mode): Handle
E_VNx2BFmode and E_VNx4BFmode.
(aarch64_evpc_rev_local): Base the analysis on the container size
instead of the element size.  Use the new aarch64_sve_revbhw
patterns for SVE.
(aarch64_evpc_dup): Handle partial SVE data modes.  Use the
container size instead of the element size when applying the
SVE immediate limit.  Fix a previously incorrect bounds check.
(aarch64_expand_vec_perm_const_1): Handle partial SVE data modes.

gcc/testsuite/
* gcc.target/aarch64/sve/dup_lane_2.c: New test.
* gcc.target/aarch64/sve/dup_lane_3.c: Likewise.
* gcc.target/aarch64/sve/ext_4.c: Likewise.
* gcc.target/aarch64/sve/rev_2.c: Likewise.
* gcc.target/aarch64/sve/revhw_1.c: Likewise.
* gcc.target/aarch64/sve/revhw_2.c: Likewise.
* gcc.target/aarch64/sve/slp_perm_8.c: Likewise.
* gcc.target/aarch64/sve/trn1_2.c: Likewise.
* gcc.target/aarch64/sve/trn2_2.c: Likewise.
* gcc.target/aarch64/sve/uzp1_2.c: Likewise.
* gcc.target/aarch64/sve/uzp2_2.c: Likewise.
* gcc.target/aarch64/sve/zip1_2.c: Likewise.
* gcc.target/aarch64/sve/zip2_2.c: Likewise.

4 years agoAdd -fbit-tests option.
Martin Liska [Fri, 2 Oct 2020 12:12:06 +0000 (14:12 +0200)]
Add -fbit-tests option.

gcc/ChangeLog:

* common.opt: Add new -fbit-tests option.
* doc/invoke.texi: Document the option.
* tree-switch-conversion.c (bit_test_cluster::find_bit_tests):
Use the option.
* tree-switch-conversion.h (is_enabled): New function.

gcc/testsuite/ChangeLog:

* gcc.dg/tree-ssa/switch-4.c: New test.

4 years agomake PRE constant value IDs negative
Richard Biener [Fri, 6 Nov 2020 14:13:56 +0000 (15:13 +0100)]
make PRE constant value IDs negative

This separates constant and non-constant value-ids to allow for
a more efficient constant_value_id_p and for more efficient bit-packing
inside the bitmap sets which never contain any constant values.

There's further optimization opportunities but at this stage
I'll do small refactorings.

2020-11-06  Richard Biener  <rguenther@suse.de>

* tree-ssa-sccvn.h (get_max_constant_value_id): Declare.
(get_next_constant_value_id): Likewise.
(value_id_constant_p): Inline and simplify.
* tree-ssa-sccvn.c (constant_value_ids): Remove.
(next_constant_value_id): Add.
(get_or_alloc_constant_value_id): Adjust.
(value_id_constant_p): Remove definition.
(get_max_constant_value_id): Define.
(get_next_value_id): Add assert for overflow.
(get_next_constant_value_id): Define.
(run_rpo_vn): Adjust.
(free_rpo_vn): Likewise.
(do_rpo_vn): Initialize next_constant_value_id.
* tree-ssa-pre.c (constant_value_expressions): New.
(add_to_value): Split into constant/non-constant value
handling.  Avoid exact re-allocation.
(vn_valnum_from_value_id): Adjust.
(phi_translate_1): Remove spurious exact re-allocation.
(bitmap_find_leader): Adjust.  Make sure we return
a CONSTANT value for a constant value id.
(do_pre_regular_insertion): Use 2 auto-elements for avail.
(do_pre_partial_partial_insertion): Likewise.
(init_pre): Allocate constant_value_expressions.
(fini_pre): Release constant_value_expressions.

4 years agotree-optimization/97706 - handle PHIs in pattern recog mask precison
Richard Biener [Thu, 5 Nov 2020 11:34:42 +0000 (12:34 +0100)]
tree-optimization/97706 - handle PHIs in pattern recog mask precison

This adds handling of PHIs to mask precision compute which is
eventually needed to detect a bool pattern when the def chain
contains such a PHI node.

2020-11-06  Richard Biener  <rguenther@suse.de>

PR tree-optimization/97706
* tree-vect-patterns.c (possible_vector_mask_operation_p):
PHIs are possible mask operations.
(vect_determine_mask_precision): Handle PHIs.
(vect_determine_precisions): Walk PHIs in BB analysis.

* gcc.dg/vect/bb-slp-pr97706.c: New testcase.

4 years agoc++: Parser tweaks
Nathan Sidwell [Fri, 6 Nov 2020 13:57:34 +0000 (05:57 -0800)]
c++: Parser tweaks

We need to adjust the wording for 'export'.  Between c++11 and c++20
it is deprecated.  Outside those ranges it is unsupported (at the
moment).  While here, there's also an unneeded setting of a bool --
it's inside an if block that just checked it was true.

gcc/cp/
* parser.c (cp_parser_template_declaration): Adjust 'export' warning.
(cp_parser_explicit_specialization): Remove unneeded bool setting.

4 years agotestsuite: fix malloc alignment in test
Kewen Lin [Fri, 6 Nov 2020 13:45:06 +0000 (14:45 +0100)]
testsuite: fix malloc alignment in test

gcc/testsuite/ChangeLog:

PR gcov-profile/97461
* gcc.dg/tree-prof/pr97461.c: Return aligned memory.

4 years ago[Fortran] Remove OpenACC 'loop' inside 'parallel' special-case code
Thomas Schwinge [Tue, 27 Oct 2020 09:43:27 +0000 (10:43 +0100)]
[Fortran] Remove OpenACC 'loop' inside 'parallel' special-case code

Instead, use the generic middle-end code, like already used for Fortran OpenACC
'loop' inside other compute constructs, orphaned 'loop' constructs, and C, C++
generally.

gcc/fortran/
* openmp.c (oacc_is_parallel, resolve_oacc_params_in_parallel):
Remove.
(resolve_oacc_loop_blocks): Don't call the former.
gcc/testsuite/
* gfortran.dg/goacc/loop-2-parallel-3.f95: Adjust.

4 years agoRemove 'gfortran.dg/goacc/loop-6.f95'
Thomas Schwinge [Tue, 27 Oct 2020 06:26:24 +0000 (07:26 +0100)]
Remove 'gfortran.dg/goacc/loop-6.f95'

What it's testing is adequately covered in other
'gfortran.dg/goacc/loop-2-parallel-*.f95' testcases.

gcc/testsuite/
* gfortran.dg/goacc/loop-6.f95: Remove.

4 years agoRemove 'gfortran.dg/goacc/loop-5.f95'
Thomas Schwinge [Tue, 27 Oct 2020 09:16:29 +0000 (10:16 +0100)]
Remove 'gfortran.dg/goacc/loop-5.f95'

What it's testing is adequately covered in other
'gfortran.dg/goacc/loop-2-*-tile.f95' testcases.

gcc/testsuite/
* gfortran.dg/goacc/loop-5.f95: Remove.

4 years agogcc-changelog: prevent double cherry-pick line
Martin Liska [Thu, 5 Nov 2020 11:33:25 +0000 (12:33 +0100)]
gcc-changelog: prevent double cherry-pick line

contrib/ChangeLog:

* gcc-changelog/git_commit.py: Add new check.
* gcc-changelog/test_email.py: Test it.
* gcc-changelog/test_patches.txt: Add new patch.

4 years agorefactor SLP analysis
Richard Biener [Fri, 6 Nov 2020 11:44:47 +0000 (12:44 +0100)]
refactor SLP analysis

This passes down the graph entry kind down to vect_analyze_slp_instance
which simplifies it and makes it a shallow wrapper around
vect_build_slp_instance.

2020-11-06  Richard Biener  <rguenther@suse.de>

* tree-vect-slp.c (vect_analyze_slp): Pass down the
SLP graph entry kind.
(vect_analyze_slp_instance): Simplify.
(vect_build_slp_instance): Adjust.
(vect_slp_check_for_constructors): Perform more
eligibility checks here.

4 years agoMove ipa-refs from ggc to heap.
Jan Hubicka [Fri, 6 Nov 2020 12:30:39 +0000 (13:30 +0100)]
Move ipa-refs from ggc to heap.

gcc/ChangeLog:

* ipa-ref.h (enum ipa_ref_use): Remove GTY marker.
(struct ipa_ref): Remove GTY marker; reorder for better packing.
(struct ipa_ref_list): Remove GTY marker; turn references
nad referring to va_heap, vl_ptr vectors; update accesors.
* cgraph.h (symtab_node::iterate_reference): Update.
* ipa-ref.c (ipa_ref::remove_reference): Update.
* symtab.c (symtab_node::create_reference): Update.
(symtab_node::remove_all_references): Update.
(symtab_node::resolve_alias): Update.

gcc/cp/ChangeLog:

* tree.c (cp_fix_function_decl_p): Do not access ipa_ref_list dirrectly.

4 years agoipa-modref: Fix comment typos
Jakub Jelinek [Fri, 6 Nov 2020 12:20:51 +0000 (13:20 +0100)]
ipa-modref: Fix comment typos

2020-11-06  Jakub Jelinek  <jakub@redhat.com>

* ipa-modref-tree.h: Fix comment typos.
* ipa-modref.c: Likewise.

4 years agoIBM Z: Remove override of inline params
Andreas Krebbel [Fri, 6 Nov 2020 11:58:59 +0000 (12:58 +0100)]
IBM Z: Remove override of inline params

We have pretty aggressive values for inline-min-speedup and
max-inline-insns-auto. This unfortunately made more maybe
uninitialized warnings to appear when building on Z.

With the patch we go back to the default values.

gcc/ChangeLog:

* config/s390/s390.c (s390_option_override_internal): Remove
override of inline params.

4 years agotree-optimization/97706 - part one, refactor vect_determine_mask_precision
Richard Biener [Fri, 6 Nov 2020 10:11:42 +0000 (11:11 +0100)]
tree-optimization/97706 - part one, refactor vect_determine_mask_precision

This computes vect_determine_mask_precision in a RPO forward walk
rather than in a backward walk and using a worklist.  It will make
fixing PR97706 easier but for bisecting I wanted it to be separate.

2020-11-06  Richard Biener  <rguenther@suse.de>

PR tree-optimization/97706
* tree-vect-patterns.c (vect_determine_mask_precision):
Remove worklist operation.
(vect_determine_stmt_precisions): Do not call
vect_determine_mask_precision here.
(vect_determine_precisions): Compute mask precision
in a forward walk.

4 years agoOpenACC/Fortran: Reject '!$acc atomic update capture'
Tobias Burnus [Fri, 6 Nov 2020 11:30:20 +0000 (12:30 +0100)]
OpenACC/Fortran: Reject '!$acc atomic update capture'

gcc/fortran/ChangeLog:

* openmp.c (gfc_match_oacc_atomic): No longer accept 'update capture'.

gcc/testsuite/ChangeLog:

* gfortran.dg/goacc-gomp/goacc-gomp.exp: New.
* gfortran.dg/goacc-gomp/atomic.f90: New test.
* gfortran.dg/goacc/atomic.f90: New test.

4 years agoOpenACC (C/C++): Fix 'acc atomic' parsing
Tobias Burnus [Fri, 6 Nov 2020 10:13:47 +0000 (11:13 +0100)]
OpenACC (C/C++): Fix 'acc atomic' parsing

gcc/c/ChangeLog:

* c-parser.c (c_parser_omp_atomic): Add openacc parameter and update
OpenACC matching.
(c_parser_omp_construct): Update call.

gcc/cp/ChangeLog:

* parser.c (cp_parser_omp_atomic): Add openacc parameter and update
OpenACC matching.
(cp_parser_omp_construct): Update call.

gcc/testsuite/ChangeLog:

* c-c++-common/goacc-gomp/atomic.c: New test.
* c-c++-common/goacc/atomic.c: New test.

4 years agotree-optimization/97732 - fix init of SLP induction vectorization
Richard Biener [Fri, 6 Nov 2020 08:35:27 +0000 (09:35 +0100)]
tree-optimization/97732 - fix init of SLP induction vectorization

This PR exposes two issues - one that the vector builder treats
&x as eligible for VECTOR_CST elements and one that SLP induction
vectorization forgets to convert init elements to the vector
component type which makes a difference for pointer vs. integer.

2020-11-06  Richard Biener  <rguenther@suse.de>

PR tree-optimization/97732
* tree-vect-loop.c (vectorizable_induction): Convert the
init elements to the vector component type.
* gimple-fold.c (gimple_build_vector): Use CONSTANT_CLASS_P
rather than TREE_CONSTANT to determine if elements are
eligible for VECTOR_CSTs.

* gcc.dg/vect/bb-slp-pr97732.c: New testcase.

4 years agoAdd dg-require-profiling directives to gcc.target/i386 tests
Olivier Hainque [Fri, 28 Feb 2020 10:57:20 +0000 (10:57 +0000)]
Add dg-require-profiling directives to gcc.target/i386 tests

This patch adds /* { dg-require-profiling "-pg" } */
to a few tests in gcc.target/i386 that use -pg explicitly, to
prevent them from failing during runs for VxWorks targets.

2020-10-29  Olivier Hainque  <hainque@adacore.com>

gcc/testsuite/
* gcc.target/i386/fentryname1.c: Add dg-require-profiling.
* gcc.target/i386/fentryname2.c: Likewise.
* gcc.target/i386/fentryname3.c: Likewise.
* gcc.target/i386/returninst1.c: Likewise.
* gcc.target/i386/returninst2.c: Likewise.
* gcc.target/i386/returninst3.c: Likewise.

4 years agoAdd dg-require-effective-target fpic to g++ tests
Olivier Hainque [Wed, 26 Feb 2020 17:55:09 +0000 (17:55 +0000)]
Add dg-require-effective-target fpic to g++ tests

Add missing dg-require-effective-target fpic to few
g++.dg tests.

2020-11-02  Olivier Hainque  <hainque@adacore.com>

gcc/testsuite/
* g++.dg/pr57878.C: Add dg-require-effective-target fpic.
* g++.dg/pr65032.C: Likewise.
* g++.dg/pr84279.C: Likewise.
* g++.dg/inherit/thunk8.C: Likewise.
* g++.dg/opt/pr64411.C: Likewise.

4 years agoAdd fnspec handling to ipa mode of ipa-modef.
Jan Hubicka [Fri, 6 Nov 2020 09:23:58 +0000 (10:23 +0100)]
Add fnspec handling to ipa mode of ipa-modef.

gcc/:

* attr-fnspec.h (attr_fnspec::get_str): New accessor
* ipa-fnsummary.c (read_ipa_call_summary): Store also parm info
for builtins.
* ipa-modref.c (class fnspec_summary): New type.
(class fnspec_summaries_t): New type.
(modref_summary::modref_summary): Initialize writes_errno.
(struct modref_summary_lto): Add writes_errno.
(modref_summary_lto::modref_summary_lto): Initialize writes_errno.
(modref_summary::dump): Check for NULL pointers.
(modref_summary_lto::dump): Dump writes_errno.
(collapse_loads): Move up in source file.
(collapse_stores): New function.
(process_fnspec): Handle also internal calls.
(analyze_call): Likewise.
(analyze_stmt): Store fnspec string if needed.
(analyze_function): Initialize fnspec_sumarries.
(modref_summaries_lto::duplicate): Copy writes_errno.
(modref_write): Store writes_errno and fnspec summaries.
(read_section): Read writes_errno and fnspec summaries.
(modref_read): Initialize fnspec summaries.
(update_signature): Fix formating.
(compute_parm_map): Return true if sucessful.
(get_parm_type): New function.
(get_access_for_fnspec): New function.
(propagate_unknown_call): New function.
(modref_propagate_in_scc): Use it.
(pass_ipa_modref::execute): Delete fnspec_summaries.
(ipa_modref_c_finalize): Delete fnspec_summaries.
* ipa-prop.c: Include attr-fnspec.h.
(ipa_compute_jump_functions_for_bb):  Also compute jump functions
for functions with fnspecs.
(ipa_read_edge_info): Read jump functions for builtins.

gcc/testsuite/ChangeLog:

* gcc.dg/ipa/modref-2.c: New test.
* gcc.dg/lto/modref-2_0.c: New test.

4 years agoMove size time tables from GGC to heap
Jan Hubicka [Fri, 6 Nov 2020 09:05:11 +0000 (10:05 +0100)]
Move size time tables from GGC to heap

this patch moves size time tables out of ggc allocated memory.  This makes
sources bit cleaner and saves about 60MB of GGC memory that turns to about 45MB
of heap memory for cc1plus LTO build.

* ipa-fnsummary.h (class size_time_entry): Do not GTY annotate.
(class ipa_fnsummary): Turn size_time_table to auto_vec and
call_size_time_table to effecient vec; update constructors.
* ipa-fnsummary.c (ipa_fn_summary::account_size_time): Update.
(ipa_fn_summary::~ipa_fn_summary): Update.
(ipa_fn_summary_t::duplicate): Update.
(ipa_dump_fn_summary): Update.
(set_switch_stmt_execution_predicate): Update.
(analyze_function_body): Update.
(estimate_calls_size_and_time): Update.
(ipa_call_context::estimate_size_and_time): Update.
(ipa_merge_fn_summary_after_inlining): Update.
(ipa_update_overall_fn_summary): Update.
(inline_read_section): Update.
(ipa_fn_summary_write): Update.

4 years agoc-common: Remove DEBUG_FUNCTION from verify_sequence_points
Jakub Jelinek [Fri, 6 Nov 2020 08:52:59 +0000 (09:52 +0100)]
c-common: Remove DEBUG_FUNCTION from verify_sequence_points

While perhaps the function name might suggest that it is a verification/debugging
only routine, it is actually implementation of the -Wsequence-point warning
and so doesn't need the DEBUG_FUNCTION macro on it.

2020-11-06  Jakub Jelinek  <jakub@redhat.com>

* c-common.c (verify_sequence_points): Remove DEBUG_FUNCTION.

4 years agotree-optimization/97733 - fix SLP of reductions with zero relevant
Richard Biener [Fri, 6 Nov 2020 07:34:16 +0000 (08:34 +0100)]
tree-optimization/97733 - fix SLP of reductions with zero relevant

This adds a missing check.

2020-11-06  Richard Biener  <rguenther@suse.de>

PR tree-optimization/97733
* tree-vect-slp.c (vect_analyze_slp_instance): If less
than two reductions were relevant or live do nothing.

4 years agoFortran: Fix type-decl for PDT / wrong-code pdt_14.f03 issue [PR97652]
Tobias Burnus [Fri, 6 Nov 2020 07:26:51 +0000 (08:26 +0100)]
Fortran: Fix type-decl for PDT / wrong-code pdt_14.f03 issue [PR97652]

Parameterized derived types are handled in a special way and start with 'Pdt'.
If the 'P' is not uppercase, gfc_get_derived_type (which calls
gfc_get_module_backend_decl) does not find the existing declaration and
builds a new type. The middle end then sees those types as being different
and nonalising, creating an endless loop for pdt_14.f03.

gcc/fortran/ChangeLog:

PR fortran/97652
* module.c (mio_symbol): Fix symbol name for pdt_type.

4 years agoImprove overflow check
Jeff Law [Fri, 6 Nov 2020 03:42:17 +0000 (20:42 -0700)]
Improve overflow check

Convert
x < (short) ((unsigned short)x + const)
to
x <= SHORT_MAX – const
(and similarly for other integral types) if const is not 0.

gcc/
PR tree-optimization/97223
* match.pd (overflow detection and optimization): Handle conversions.

gcc/testsuite/

* gcc.dg/no-strict-overflow-4.c: Adjust expected output.

4 years agoSimplify x >> x to 0. This fixes PR96701.
Eugene Rozenfeld [Fri, 6 Nov 2020 03:35:45 +0000 (20:35 -0700)]
Simplify x >> x to 0. This fixes PR96701.

gcc/
* match.pd (x >> x): New pattern.

gcc/testsuite

* gcc.dg/self-right-shift.c: New test.

4 years agoRISC-V: Mark non-export symbol static and const in riscv-common.c
Kito Cheng [Fri, 6 Nov 2020 03:05:50 +0000 (11:05 +0800)]
RISC-V: Mark non-export symbol static and const in riscv-common.c

gcc/ChangeLog:

* common/config/riscv/riscv-common.c (riscv_implied_info):
Add static and const.
(riscv_subset_list::handle_implied_ext): Add const due to
riscv_implied_info changed to const.

4 years agoPR target/96307: Fix KASAN option checking.
Kito Cheng [Mon, 5 Oct 2020 06:01:04 +0000 (14:01 +0800)]
PR target/96307: Fix KASAN option checking.

 - Disable kasan if target is unsupported and -fasan-shadow-offset= is not
   given, no matter `--param asan-stack=1` is given or not.

 - Moving KASAN option checking testcase to gcc.dg, those testcase could be
   useful for all other target which not support asan.

 - Verifed on riscv and x86.

gcc/ChangeLog:

PR target/96307
* toplev.c (process_options): Remove param_asan_stack checking for kasan
option checking.

gcc/testsuite/ChangeLog:

PR target/96307
* gcc.dg/pr96307.c: New.
* gcc.target/riscv/pr96260.c: Move this test case from here to ...
* gcc.dg/pr96260.c: ... here.
* gcc.target/riscv/pr91441.c: Move this test case from here to ...
* gcc.dg/pr91441.c: ... here.
* lib/target-supports.exp (check_effective_target_no_fsanitize_address):
New proc.

4 years agoMAINTAINERS: Add myself for write after approval.
liuhongt [Fri, 6 Nov 2020 01:27:10 +0000 (09:27 +0800)]
MAINTAINERS: Add myself for write after approval.

ChangeLog:

2019-03-17  Hongtao Liu  <hongtao.liu@intel.com>

* MAINTAINERS (Write After Approval): Add myself.

4 years agoDaily bump.
GCC Administrator [Fri, 6 Nov 2020 00:16:34 +0000 (00:16 +0000)]
Daily bump.

4 years agoc++: Add auto_diagnostic_group to check_handlers_1.
Marek Polacek [Thu, 5 Nov 2020 23:23:56 +0000 (18:23 -0500)]
c++: Add auto_diagnostic_group to check_handlers_1.

This was missing.

gcc/cp/ChangeLog:

* except.c (check_handlers_1): Add auto_diagnostic_group.

4 years agoc++: Fix decltype(auto) deduction with rvalue ref [PR78209]
Marek Polacek [Tue, 3 Nov 2020 20:10:31 +0000 (15:10 -0500)]
c++: Fix decltype(auto) deduction with rvalue ref [PR78209]

Here's a small deficiency in decltype(auto).  [dcl.type.auto.deduct]/5:
If the placeholder-type-specifier is of the form decltype(auto), [...]
the type deduced for T is determined [...] as though E had been the operand
of the decltype.  So:

  int &&i = 0;
  decltype(auto) j = i; // should behave like int &&j = i; error

We deduce j's type in do_auto_deduction via finish_decltype_type which
takes an 'id' argument.  Currently we compute 'id' as false, because
stripped_init is *i (a REFERENCE_REF_P).  But it seems to me we should
rather set 'id' to true here, by looking through the REFERENCE_REF_P,
so that finish_decltype_type DTRT.

gcc/cp/ChangeLog:

PR c++/78209
* pt.c (do_auto_deduction): If init is REFERENCE_REF_P, use its
first operand.

gcc/testsuite/ChangeLog:

PR c++/78209
* g++.dg/cpp1y/decltype-auto1.C: New test.

4 years agoc++: Add -Wexceptions warning option [PR97675]
Marek Polacek [Tue, 3 Nov 2020 22:46:23 +0000 (17:46 -0500)]
c++: Add -Wexceptions warning option [PR97675]

This PR asks that we add a warning option for an existing (very old)
warning, so that it can be disabled selectively.  clang++ uses
-Wexceptions for this, so I added this new option rather than using
e.g. -Wnoexcept.

gcc/c-family/ChangeLog:

PR c++/97675
* c.opt (Wexceptions): New option.

gcc/cp/ChangeLog:

PR c++/97675
* except.c (check_handlers_1): Use OPT_Wexceptions for the
warning.  Use inform for the second part of the warning.

gcc/ChangeLog:

PR c++/97675
* doc/invoke.texi: Document -Wexceptions.

gcc/testsuite/ChangeLog:

PR c++/97675
* g++.old-deja/g++.eh/catch10.C: Adjust dg-warning.
* g++.dg/warn/Wexceptions1.C: New test.
* g++.dg/warn/Wexceptions2.C: New test.

4 years agoc++: Implement -Wvexing-parse [PR25814]
Marek Polacek [Fri, 2 Oct 2020 13:46:30 +0000 (09:46 -0400)]
c++: Implement -Wvexing-parse [PR25814]

This patch implements the -Wvexing-parse warning to warn about the
sneaky most vexing parse rule in C++: the cases when a declaration
looks like a variable definition, but the C++ language requires it
to be interpreted as a function declaration.  This warning is on by
default (like clang++).  From the docs:

  void f(double a) {
    int i();        // extern int i (void);
    int n(int(a));  // extern int n (int);
  }

  Another example:

  struct S { S(int); };
  void f(double a) {
    S x(int(a));   // extern struct S x (int);
    S y(int());    // extern struct S y (int (*) (void));
    S z();         // extern struct S z (void);
  }

You can find more on this in [dcl.ambig.res].

I spent a fair amount of time on fix-it hints so that GCC can recommend
various ways to resolve such an ambiguity.  Sometimes that's tricky.
E.g., suggesting default-initialization when the class doesn't have
a default constructor would not be optimal.  Suggesting {}-init is also
not trivial because it can use an initializer-list constructor if no
default constructor is available (which ()-init wouldn't do).  And of
course, pre-C++11, we shouldn't be recommending {}-init at all.

I also uncovered a bug in cp_parser_declarator, where we were setting
*parenthesized_p to true despite the comment saying the exact opposite.

gcc/c-family/ChangeLog:

PR c++/25814
* c.opt (Wvexing-parse): New option.

gcc/cp/ChangeLog:

PR c++/25814
* cp-tree.h (enum cp_tree_index): Add CPTI_EXPLICIT_VOID_LIST.
(explicit_void_list_node): Define.
(PARENTHESIZED_LIST_P): New macro.
(struct cp_declarator): Add function::parens_loc.
* decl.c (cxx_init_decl_processing): Initialize explicit_void_list_node.
(grokparms): Also break when explicit_void_list_node.
* parser.c (make_call_declarator): New location_t parameter.  Use it
to set declarator->u.function.parens_loc.
(cp_parser_lambda_declarator_opt): Pass UNKNOWN_LOCATION to
make_call_declarator.
(warn_about_ambiguous_parse): New function.
(cp_parser_init_declarator): Call warn_about_ambiguous_parse.
(cp_parser_declarator): Set *parenthesized_p to false rather than to
true.
(cp_parser_direct_declarator): Create a location for the function's
parentheses and pass it to make_call_declarator.
(cp_parser_parameter_declaration_clause): Return explicit_void_list_node
for (void).
(cp_parser_parameter_declaration_list): Set PARENTHESIZED_LIST_P
in the parameters tree.

gcc/ChangeLog:

PR c++/25814
* doc/invoke.texi: Document -Wvexing-parse.

gcc/testsuite/ChangeLog:

PR c++/25814
* g++.dg/cpp2a/fn-template16.C: Add a dg-warning.
* g++.dg/cpp2a/fn-template7.C: Likewise.
* g++.dg/lookup/pr80891-5.C: Likewise.
* g++.dg/lto/pr79050_0.C: Add extern.
* g++.dg/lto/pr84805_0.C: Likewise.
* g++.dg/parse/pr58898.C: Add a dg-warning.
* g++.dg/template/scope5.C: Likewise.
* g++.old-deja/g++.brendan/recurse.C: Likewise.
* g++.old-deja/g++.jason/template4.C: Likewise.
* g++.old-deja/g++.law/arm4.C: Likewise.
* g++.old-deja/g++.mike/for2.C: Likewise.
* g++.old-deja/g++.other/local4.C: Likewise.
* g++.old-deja/g++.pt/crash3.C: Likewise.
* g++.dg/warn/Wvexing-parse.C: New test.
* g++.dg/warn/Wvexing-parse2.C: New test.
* g++.dg/warn/Wvexing-parse3.C: New test.
* g++.dg/warn/Wvexing-parse4.C: New test.
* g++.dg/warn/Wvexing-parse5.C: New test.
* g++.dg/warn/Wvexing-parse6.C: New test.
* g++.dg/warn/Wvexing-parse7.C: New test.

libstdc++-v3/ChangeLog:

PR c++/25814
* testsuite/20_util/reference_wrapper/lwg2993.cc: Add a dg-warning.
* testsuite/25_algorithms/generate_n/87982_neg.cc: Likewise.

4 years agoPass multi-range from range_query::value_* routines
Andrew MacLeod [Thu, 5 Nov 2020 18:59:45 +0000 (13:59 -0500)]
Pass multi-range from range_query::value_*  routines

fix range-ops equal/not_equal to not reuse the result range as intermediary.
value_query::value routines should pasa multi-range in as some other rangeop
routines build into this result, so we may need better precision.

gcc/
PR tree-optimization/97725
* range-op.cc (operator_equal::fold_range): Use new tmp value.
(operator_not_equal::fold_range): Ditto.
* value-query.cc (range_query::value_of_expr): Use int_range_max
not a value_range.
(range_query::value_on_edge): Ditto.
(range_query::value_of_stmt): Ditto.
gcc/testsuite/
* gcc.dg/pr97725.c: New.

4 years agolibstdc++: Fix typo in ChangeLog entry
Jonathan Wakely [Thu, 5 Nov 2020 19:35:34 +0000 (19:35 +0000)]
libstdc++: Fix typo in ChangeLog entry

4 years agolibstdc++: Fix constraints on std::optional comparisons [PR 96269]
Jonathan Wakely [Thu, 5 Nov 2020 18:36:19 +0000 (18:36 +0000)]
libstdc++: Fix constraints on std::optional comparisons [PR 96269]

The relational operators for std::optional were using the wrong types
in the declval expressions used to constrain them. Instead of using
const lvalues they were using non-const rvalues, which meant that a type
might satisfy the constraints but then give an error when the function
body was instantiated.

libstdc++-v3/ChangeLog:

PR libstdc++/96269
* include/std/optional (operator==, operator!=, operator<)
(operator>, operator<=, operator>=): Fix types used in
SFINAE constraints.
* testsuite/20_util/optional/relops/96269.cc: New test.

4 years agoopenmp: Mark deprecated symbols in OpenMP 5.0
Kwok Cheung Yeung [Thu, 5 Nov 2020 18:11:23 +0000 (10:11 -0800)]
openmp: Mark deprecated symbols in OpenMP 5.0

2020-11-05  Ulrich Drepper  <drepper@redhat.com>
    Kwok Cheung Yeung  <kcy@codesourcery.com>

libgomp/
* Makefile.am (%.mod): Add -cpp and -fopenmp to compile flags.
* Makefile.in: Regenerate.
* fortran.c: Wrap uses of omp_set_nested and omp_get_nested with
pragmas to ignore -Wdeprecated-declarations warnings.
* icv.c: Likewise.
* omp.h.in (__GOMP_DEPRECATED_5_0): Define.
Mark omp_lock_hint_* enum values, omp_lock_hint_t, omp_set_nested,
and omp_get_nested with __GOMP_DEPRECATED_5_0.
* omp_lib.f90.in: Mark omp_get_nested and omp_set_nested as
deprecated.
* testsuite/libgomp.c++/affinity-1.C: Add -Wno-deprecated-declarations
to test options.
* testsuite/libgomp.c/affinity-1.c: Likewise.
* testsuite/libgomp.c/affinity-2.c: Likewise.
* testsuite/libgomp.c/appendix-a/a.15.1.c: Likewise.
* testsuite/libgomp.c/lib-1.c: Likewise.
* testsuite/libgomp.c/nested-1.c: Likewise.
* testsuite/libgomp.c/nested-2.c: Likewise.
* testsuite/libgomp.c/nested-3.c: Likewise.
* testsuite/libgomp.c/pr32362-1.c: Likewise.
* testsuite/libgomp.c/pr32362-2.c: Likewise.
* testsuite/libgomp.c/pr32362-3.c: Likewise.
* testsuite/libgomp.c/pr35549.c: Likewise.
* testsuite/libgomp.c/pr42942.c: Likewise.
* testsuite/libgomp.c/pr61200.c: Likewise.
* testsuite/libgomp.c/sort-1.c: Likewise.
* testsuite/libgomp.c/target-5.c: Likewise.
* testsuite/libgomp.c/target-6.c: Likewise.
* testsuite/libgomp.c/teams-1.c: Likewise.
* testsuite/libgomp.c/thread-limit-1.c: Likewise.
* testsuite/libgomp.c/thread-limit-2.c: Likewise.
* testsuite/libgomp.c/thread-limit-4.c: Likewise.
* testsuite/libgomp.fortran/affinity1.f90: Likewise.
* testsuite/libgomp.fortran/lib1.f90: Likewise.
* testsuite/libgomp.fortran/lib2.f: Likewise.
* testsuite/libgomp.fortran/nested1.f90: Likewise.
* testsuite/libgomp.fortran/teams1.f90: Likewise.

4 years agoHandle use of r18 as a TCB pointer on aarch64-vxworks
Olivier Hainque [Wed, 4 Nov 2020 08:05:06 +0000 (08:05 +0000)]
Handle use of r18 as a TCB pointer on aarch64-vxworks

Pick an alternate static chain regnum and document that
the port needs to be configured to issue -ffixed-r18 by
default.  The current definition of TARGET_OS_USES_R18 is
not honored by the common part of the back-end.

2020-11-04  Olivier Hainque  <hainque@adacore.com>

gcc/
* config/aarch64/aarch64-vxworks.h (TARGET_OS_USES_R18):
Remove definition.
(STATIC_CHAIN_REGNUM): Redefine to 9.

4 years agolibstdc++: Use non-throwing increment in recursive_directory_iterator [PR 97731]
Jonathan Wakely [Thu, 5 Nov 2020 17:26:13 +0000 (17:26 +0000)]
libstdc++: Use non-throwing increment in recursive_directory_iterator [PR 97731]

As described in the PR, the recursive_directory_iterator constructor
calls advance(ec), but ec is a pointer so it calls _Dir::advance(bool).
The intention was to either call advance() or advance(*ec) depending
whether the pointer is null or not.

This fixes the bug and renames the parameter to ecptr to make similar
mistakes less likely in future.

libstdc++-v3/ChangeLog:

PR libstdc++/97731
* src/filesystem/dir.cc (recursive_directory_iterator): Call the
right overload of _Dir::advance.
* testsuite/experimental/filesystem/iterators/97731.cc: New test.

4 years agolibstdc++: Fix multiple definitions of std::exception_ptr functions [PR 97729]
Jonathan Wakely [Thu, 5 Nov 2020 16:19:15 +0000 (16:19 +0000)]
libstdc++: Fix multiple definitions of std::exception_ptr functions [PR 97729]

This fixes some multiple definition errors caused by the changes for
PR libstdc++/90295. The previous solution for inlining the members of
std::exception_ptr but still exporting them from the library was to
suppress the 'inline' keyword on those functions when compiling
libsupc++/eh_ptr.cc, so they get defined in that file. That produces ODR
violations though, because there are now both inline and non-inline
definitions in the library, due to the use of std::exception_ptr in
other files sucg as src/c++11/future.cc.

The new solution is to define all the relevant members as 'inline'
unconditionally, but use __attribute__((used)) to cause definitions to
be emitted in libsupc++/eh_ptr.cc as before. This doesn't quite work
however, because PR c++/67453 means the attribute is ignored on
constructors and destructors. As a workaround, the old solution
(conditionally inline) is still used for those members, but they are
given the always_inline attribute so that they aren't emitted in
src/c++11/future.o as inline definitions.

libstdc++-v3/ChangeLog:

PR libstdc++/97729
* include/std/future (__basic_future::_M_get_result): Use
nullptr for null pointer constant.
* libsupc++/eh_ptr.cc (operator==, operator!=): Remove
definitions.
* libsupc++/exception_ptr.h (_GLIBCXX_EH_PTR_USED): Define
macro to conditionally add __attribute__((__used__)).
(operator==, operator!=, exception_ptr::exception_ptr())
(exception_ptr::exception_ptr(const exception_ptr&))
(exception_ptr::~exception_ptr())
(exception_ptr::operator=(const exception_ptr&))
(exception_ptr::swap(exception_ptr&)): Always define as
inline. Add macro to be conditionally "used".

4 years agolibstdc++: Export basic_stringbuf constructor [PR 97729]
Jonathan Wakely [Thu, 5 Nov 2020 13:41:40 +0000 (13:41 +0000)]
libstdc++: Export basic_stringbuf constructor [PR 97729]

libstdc++-v3/ChangeLog:

PR libstdc++/97729
* config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Add exports.
* src/c++20/sstream-inst.cc (basic_stringbuf): Instantiate
private constructor taking __xfer_bufptrs.

4 years agoAdd dg-require-effective-target fpic to gcc.dg test
Olivier Hainque [Tue, 7 Jan 2020 16:54:13 +0000 (16:54 +0000)]
Add dg-require-effective-target fpic to gcc.dg test

The test uses -fpic and doesn't query the target support
for that option otherwise, resulting in failure on configurations
not supporting -fpic such as VxWorks for kernel mode.

2020-11-03  Olivier Hainque  <hainque@adacore.com>

gcc/testsuite/
* gcc.dg/sms-12.c: Add dg-require-effective-target fpic.

4 years agoMove and adjust PROBE_STACK reg definitions for aarch64
Olivier Hainque [Fri, 13 Dec 2019 09:09:18 +0000 (09:09 +0000)]
Move and adjust PROBE_STACK reg definitions for aarch64

The change moves the definitions of PROBE_STACK_FIRST_REG
and PROBE_STACK_SECOND_REG to a more appropriate place for such
items (here, in aarch64.md as suggested by Richard), and adjusts
their value from r9/r10 to r10/r11 to free r9 for a possibly
more general purpose (e.g. as a static chain at least on targets
which have a private use of r18, such as Windows or Vxworks).

2020-11-07  Olivier Hainque  <hainque@adacore.com>

gcc/
* config/aarch64/aarch64.md: Define PROBE_STACK_FIRST_REGNUM
and PROBE_STACK_SECOND_REGNUM constants, designating r10/r11.
Replacements for the PROBE_STACK_FIRST/SECOND_REG constants in
aarch64.c.
* config/aarch64/aarch64.c (PROBE_STACK_FIRST_REG): Remove.
(PROBE_STACK_SECOND_REG): Remove.
(aarch64_emit_probe_stack_range): Adjust to the _REG -> _REGNUM
suffix update for PROBE_STACK register numbers.

4 years agoAdd fnspecs for C++ new and delete operators
Jan Hubicka [Thu, 5 Nov 2020 17:19:07 +0000 (18:19 +0100)]
Add fnspecs for C++ new and delete operators

gcc/ChangeLog:

* gimple.c (gimple_call_fnspec): Handle C++ new and delete.
* gimple.h (gimple_call_from_new_or_delete): Constify parameter.

gcc/testsuite/ChangeLog:

* g++.dg/ipa/devirt-24.C: Update template.

4 years agomiddle-end: guard slp-11b.c testcase on vec_lanes
Tamar Christina [Thu, 5 Nov 2020 16:59:30 +0000 (16:59 +0000)]
middle-end: guard slp-11b.c testcase on vec_lanes

They say third time is the charm.. It looks like the testcase
disables the cost model and so AArch64 we end up being able to
do the permute but on x86 we can't.  However when analyzing the
testcase I didn't disable the cost model hence the difference.

So I now guard the testcase on vect_load_lanes as there's not a
"can do any permute" test directive and load lanes is what I will
be fixing up next year so this should catch it.

gcc/testsuite/ChangeLog:

* gcc.dg/vect/slp-11b.c: Guard statements.

4 years agoDrop overflow from constants while building ranges in ranger.
Aldy Hernandez [Thu, 5 Nov 2020 11:40:51 +0000 (12:40 +0100)]
Drop overflow from constants while building ranges in ranger.

Sometimes the overflow flag will leak into the IL.  Drop it while
creating ranges.

There are various places we could plug this.  This patch just plugs things
at get_tree_range which is the entry point for ranges from tree expressions.
It fixes the PR, and probably fixes the ranger entirely, but we may need
to revisit this.

For example, I looked to see if there were other places that created
ranges with TREE_OVERFLOW set, and there are various.  For example,
the following code pattern appears multiple times in vr-values.c:

  else if (is_gimple_min_invariant (op0))
    vr0.set (op0);

This can pick up TREE_OVERFLOW from the IL if present.  However, the
ranger won't see them so we're good.

At some point we should audit all this.  Or perhaps just nuke all
TREE_OVERFLOW's at irange::set.

For now, this will do.

gcc/ChangeLog:

PR tree-optimization/97721
* gimple-range.cc (get_tree_range): Drop overflow from constants.

gcc/testsuite/ChangeLog:

* gcc.dg/pr97721.c: New test.

4 years agodiagnostic paths: loosen coupling between path-printing and path_summary
David Malcolm [Thu, 5 Nov 2020 15:00:17 +0000 (10:00 -0500)]
diagnostic paths: loosen coupling between path-printing and path_summary

Doing this makes followup work to add HTML path-printing cleaner.

gcc/ChangeLog:
* tree-diagnostic-path.cc (struct path_summary::event_range): Move
out of path_summary to...
(struct event_range): ...here.
(class path_summary): Convert to...
(struct path_summary): ...this.
(path_summary::m_ranges): Drop "private".
(path_summary::print): Convert to...
(print_path_summary_as_text): ...this, passing in the path_summary
explicitly.
(default_tree_diagnostic_path_printer): Update for above change.
(selftest::test_empty_path): Likewise.
(selftest::test_intraprocedural_path): Likewise.
(selftest::test_interprocedural_path_1): Likewise.
(selftest::test_interprocedural_path_2): Likewise.
(selftest::test_recursion): Likewise.

4 years agoi386: Fix PR97715
qing zhao [Thu, 5 Nov 2020 14:57:46 +0000 (15:57 +0100)]
i386: Fix PR97715

This change fixes a bug in the i386 backend when adding
-fzero-call-used-regs=all on a target that has no x87
registers.

When there is no x87 registers available, we should not
zero stack registers.

gcc/ChangeLog:

PR target/97715
* config/i386/i386.c (zero_all_st_registers): Return
earlier when the FPU is disabled.

gcc/testsuite/ChangeLog:

PR target/97715
* gcc.target/i386/zero-scratch-regs-32.c: New test.

4 years agoanalyzer: fix ICE comparing COMPLEX_CSTs [PR97668]
David Malcolm [Thu, 5 Nov 2020 14:54:58 +0000 (09:54 -0500)]
analyzer: fix ICE comparing COMPLEX_CSTs [PR97668]

gcc/analyzer/ChangeLog:
PR analyzer/97668
* svalue.cc (cmp_cst): Handle COMPLEX_CST.

gcc/testsuite/ChangeLog:
PR analyzer/97668
* gcc.dg/analyzer/pr97668.c: New test.
* gfortran.dg/analyzer/pr97668.f: New test.

4 years agoFix uninitialized memory use in ipa-modref
Jan Hubicka [Thu, 5 Nov 2020 14:25:14 +0000 (15:25 +0100)]
Fix uninitialized memory use in ipa-modref

* ipa-modref.c (parm_map_for_arg): Initialize parm_offset and
parm_offset_knonw.
(read_section): Set writes_errno to false.

4 years agolibstdc++: Fix new <sstream> constructors
Jonathan Wakely [Thu, 5 Nov 2020 12:16:13 +0000 (12:16 +0000)]
libstdc++: Fix new <sstream> constructors

- Add a missing 'explicit' to a basic_stringbuf constructor.
- Set up the get/put area pointers in the constructor from strings using
  different allocator types.
- Remove public basic_stringbuf::__sv_type alias.
- Do not construct temporary basic_string objects with a
  default-constructed allocator.

Also, change which basic_string constructor is used, as a minor
compile-time optimization. Constructing from a basic_string_view
requires more work from the compiler, so just use a pointer and length.

libstdc++-v3/ChangeLog:

* include/std/sstream (basic_stringbuf(const allocator_type&):
Add explicit.
(basic_stringbuf(const basic_string<C,T,SA>&, openmode, const A&)):
Call _M_stringbuf_init. Construct _M_string from pointer and length
to avoid constraint checks for string view.
(basic_stringbuf::view()): Make __sv_type alias local to the
function.
(basic_istringstream(const basic_string<C,T,SA>&, openmode, const A&)):
Pass string to _M_streambuf instead of constructing a temporary
with the wrong allocator.
(basic_ostringstream(const basic_string<C,T,SA>&, openmode, const A&)):
Likewise.
(basic_stringstream(const basic_string<C,T,SA>&, openmode, const A&)):
Likewise.
* src/c++20/sstream-inst.cc: Use string_view and wstring_view
typedefs in explicit instantiations.
* testsuite/27_io/basic_istringstream/cons/char/1.cc: Add more
tests for constructors.
* testsuite/27_io/basic_ostringstream/cons/char/1.cc: Likewise.
* testsuite/27_io/basic_stringbuf/cons/char/1.cc: Likewise.
* testsuite/27_io/basic_stringbuf/cons/char/2.cc: Likewise.
* testsuite/27_io/basic_stringbuf/cons/wchar_t/1.cc: Likewise.
* testsuite/27_io/basic_stringbuf/cons/wchar_t/2.cc: Likewise.
* testsuite/27_io/basic_stringstream/cons/char/1.cc: Likewise.

4 years agolibstdc++: Adjust whitespace in <sstream>
Jonathan Wakely [Wed, 4 Nov 2020 23:55:54 +0000 (23:55 +0000)]
libstdc++: Adjust whitespace in <sstream>

libstdc++-v3/ChangeLog:

* include/std/sstream: Adjust whitespace.