platform/upstream/gcc.git
3 years agoanalyzer: directly explore within static functions [PR93355,PR96374]
David Malcolm [Tue, 2 Feb 2021 02:54:11 +0000 (21:54 -0500)]
analyzer: directly explore within static functions [PR93355,PR96374]

PR analyzer/93355 tracks that -fanalyzer fails to report the FILE *
leak in read_alias_file in intl/localealias.c.

One reason for the failure is that read_alias_file is marked as
"static", and the path leading to the single call of
read_alias_file is falsely rejected as infeasible due to
PR analyzer/96374.  I have been attempting to fix that bug, but
don't have a good solution yet.

Previously, -fanalyzer only directly explored "static" functions
if they were needed for call summaries, instead forcing them to
be indirectly explored, but if we have a feasibility bug like
above, we will fail to report any issues in a function that's
only called by such a falsely infeasible path.

It now seems wrong to me to reject directly exploring static
functions: even if there is currently no way to call a function,
it seems reasonable to warn about bugs within them, since
otherwise these latent bugs are a timebomb in the code.

Hence this patch reworks toplevel_function_p to directly explore
almost all functions, working around these feasiblity issues.
It introduces a naming convention that "__analyzer_"-prefixed
function names don't get directly explored, since this is
useful in the analyzer's DejaGnu-based tests.

This workaround gets PR analyzer/93355 closer to working, but
unfortunately there is a second instance of PR analyzer/96374
within read_alias_file itself which means even with this patch
-fanalyzer falsely rejects the path as infeasible.

Still, this ought to help in other cases, and simplifies the
implementation.

gcc/analyzer/ChangeLog:
PR analyzer/93355
PR analyzer/96374
* engine.cc (toplevel_function_p): Simplify so that
we only reject functions with a "__analyzer_" prefix.
(add_any_callbacks): Delete.
(exploded_graph::build_initial_worklist): Update for
dropped param of toplevel_function_p.
(exploded_graph::build_initial_worklist): Don't bother
looking for callbacks that are reachable from global
initializers.

gcc/testsuite/ChangeLog:
PR analyzer/93355
PR analyzer/96374
* gcc.dg/analyzer/conditionals-3.c: Add "__analyzer_"
prefix to support subroutines where necessary.
* gcc.dg/analyzer/data-model-1.c: Likewise.
* gcc.dg/analyzer/feasibility-1.c (called_by_test_6a): New.
(test_6a): New.
* gcc.dg/analyzer/params.c: Add "__analyzer_" prefix to support
subroutines where necessary.
* gcc.dg/analyzer/pr96651-2.c: Likewise.
* gcc.dg/analyzer/signal-4b.c: Likewise.
* gcc.dg/analyzer/single-field.c: Likewise.
* gcc.dg/analyzer/torture/conditionals-2.c: Likewise.

3 years agoanalyzer: add more feasibility test cases [PR93355,PR96374]
David Malcolm [Tue, 2 Feb 2021 02:52:41 +0000 (21:52 -0500)]
analyzer: add more feasibility test cases [PR93355,PR96374]

This patch adds a couple more reduced test cases derived from the
integration test for PR analyzer/93355.  In both cases, the analyzer
falsely rejects the buggy code paths as being infeasible due to
PR analyzer/96374, and so the tests are marked as XFAIL for now.

gcc/testsuite/ChangeLog:
PR analyzer/93355
PR analyzer/96374
* gcc.dg/analyzer/pr93355-localealias-feasibility-2.c: New test.
* gcc.dg/analyzer/pr93355-localealias-feasibility-3.c: New test.

3 years agod: Fix junk in generated symbol on powerpc64-*-* [PR98921]
Iain Buclaw [Mon, 1 Feb 2021 23:52:49 +0000 (00:52 +0100)]
d: Fix junk in generated symbol on powerpc64-*-* [PR98921]

This adds a special formatter to OutBuffer to handle formatted printing
of integers, a common case.  The replacement is faster and safer.

In dmangle.c, it also gets rid of a number of problematic casts, as seen
on powerpc64 targets.

Reviewed-on: https://github.com/dlang/dmd/pull/12174

gcc/d/ChangeLog:

PR d/98921
* dmd/MERGE: Merge upstream dmd 5e2a81d9c.

3 years agoDaily bump.
GCC Administrator [Tue, 2 Feb 2021 00:16:23 +0000 (00:16 +0000)]
Daily bump.

3 years agoaarch64: Reimplement vrshrn* intrinsics using builtins
Kyrylo Tkachov [Mon, 1 Feb 2021 21:10:35 +0000 (21:10 +0000)]
aarch64: Reimplement vrshrn* intrinsics using builtins

This patch moves the vrshrn* intrinsics to builtins away from inline
asm.

It's a bit of code, but it's very similar to the recent vsrhn*
reimplementation except that we use an unspec rather than standard RTL
codes for the functionality.

gcc/ChangeLog:

* config/aarch64/aarch64-simd-builtins.def (rshrn, rshrn2):
Define builtins.
* config/aarch64/aarch64-simd.md (aarch64_rshrn<mode>_insn_le):
Define.
(aarch64_rshrn<mode>_insn_be): Likewise.
(aarch64_rshrn<mode>): Likewise.
(aarch64_rshrn2<mode>_insn_le): Likewise.
(aarch64_rshrn2<mode>_insn_be): Likewise.
(aarch64_rshrn2<mode>): Likewise.
* config/aarch64/aarch64.md (unspec): Add UNSPEC_RSHRN.
* config/aarch64/arm_neon.h (vrshrn_high_n_s16): Reimplement
using builtin.
(vrshrn_high_n_s32): Likewise.
(vrshrn_high_n_s64): Likewise.
(vrshrn_high_n_u16): Likewise.
(vrshrn_high_n_u32): Likewise.
(vrshrn_high_n_u64): Likewise.
(vrshrn_n_s16): Likewise.
(vrshrn_n_s32): Likewise.
(vrshrn_n_s64): Likewise.
(vrshrn_n_u16): Likewise.
(vrshrn_n_u32): Likewise.
(vrshrn_n_u64): Likewise.

gcc/testsuite/ChangeLog:

* gcc.target/aarch64/narrow_high-intrinsics.c: Adjust rshrn2
assembly scan.

3 years agoanalyzer: fix false positives with *UNKNOWN_PTR [PR98918]
David Malcolm [Mon, 1 Feb 2021 20:13:39 +0000 (15:13 -0500)]
analyzer: fix false positives with *UNKNOWN_PTR [PR98918]

PR analyzer/98918 reports various false positives and state explosions
on correct code that frees nodes and other pointers in a singly-linked
list.

The issue is that state-merger in the loop leads to UNKNOWN_VALUEs,
and these are then erroneously used to form compound symbolic values
and regions, such as;
  INIT_VAL((*UNKNOWN(struct marker *)).ref)
and:
  (*INIT_VAL((*UNKNOWN(struct marker * *))))
The malloc state machine then treats these symbolic values as
identifying specific pointers, and thus e.g. erroneously reports a
double-free when
  INIT_VAL((*UNKNOWN(struct marker *)).ref)
is freed twice (on subsequent iterations of the loop).

Similarly, the increasingly complex compound symbolic values have
sm-state which prevents state merging, and eventually lead to the
analysis hitting safety limits and stopping.

This patch makes various compound values involving UNKNOWN be
themselves UNKNOWN, resolving both the false positives and the state
explosions.

gcc/analyzer/ChangeLog:
PR analyzer/98918
* region-model-manager.cc
(region_model_manager::get_or_create_initial_value):
Fold the initial value of *UNKNOWN_PTR to an UNKNOWN value.
(region_model_manager::get_field_region): Fold the value
of UNKNOWN_PTR->FIELD to *UNKNOWN_PTR_OF_&FIELD_TYPE.

gcc/testsuite/ChangeLog:
PR analyzer/98918
* gcc.dg/analyzer/pr98918.c: New test.

3 years agolibstdc++: Make deque iterator operator- usable with value-init iterators
François Dumont [Thu, 28 Jan 2021 18:00:56 +0000 (19:00 +0100)]
libstdc++: Make deque iterator operator- usable with value-init iterators

N3644 implies that operator- can be used on value-init iterators. We now return
0 if both iterators are value initialized. If only one is value initialized we
keep the UB by returning the result of a normal computation which is a meaningless
value.

libstdc++-v3/ChangeLog:

PR libstdc++/70303
* include/bits/stl_deque.h (std::deque<>::operator-(iterator, iterator)):
Return 0 if both iterators are value-initialized.
* testsuite/23_containers/deque/70303.cc: New test.
* testsuite/23_containers/vector/70303.cc: New test.

3 years agotree-optimization/98499 - fix modref analysis on RVO statements
Sergei Trofimovich [Mon, 11 Jan 2021 18:05:57 +0000 (18:05 +0000)]
tree-optimization/98499 - fix modref analysis on RVO statements

Before the change RVO gimple statements were treated as local
stores by modres analysis. But in practice RVO escapes target.

2021-02-01  Sergei Trofimovich  <siarheit@google.com>

gcc/ChangeLog:

PR tree-optimization/98499
* ipa-modref.c (analyze_ssa_name_flags): treat RVO
conservatively and assume all possible side-effects.

gcc/testsuite/ChangeLog:

PR tree-optimization/98499
* g++.dg/pr98499.C: new test.

3 years agoaarch64: Reimplement vmovl_high_* intrinsics using builtins
Kyrylo Tkachov [Mon, 1 Feb 2021 15:29:13 +0000 (15:29 +0000)]
aarch64: Reimplement vmovl_high_* intrinsics using builtins

The vmovl_high_* intrinsics map down to the SXTL2/UXTL2 instructions
that already have appropriately-named patterns and expanders,
so it's straightforward to wire them up.

gcc/ChangeLog:

* config/aarch64/aarch64-simd-builtins.def (vec_unpacks_hi,
vec_unpacku_hi_): Define builtins.
* config/aarch64/arm_neon.h (vmovl_high_s8): Reimplement using
builtin.
(vmovl_high_s16): Likewise.
(vmovl_high_s32): Likewise.
(vmovl_high_u8): Likewise.
(vmovl_high_u16): Likewise.
(vmovl_high_u32): Likewise.

gcc/testsuite/ChangeLog:

* gcc.target/aarch64/simd/vmovl_high_1.c: New test.

3 years agoaarch64: Reimplement vabdl_* intrinsics using builtins
Kyrylo Tkachov [Mon, 1 Feb 2021 14:57:29 +0000 (14:57 +0000)]
aarch64: Reimplement vabdl_* intrinsics using builtins

Another simple set of intrinsic moved to builtins in the straightforward
way.

gcc/ChangeLog:

* config/aarch64/aarch64-simd-builtins.def (sabdl, uabdl):
Define builtins.
* config/aarch64/aarch64-simd.md (aarch64_<sur>abdl<mode>): New
pattern.
* config/aarch64/aarch64.md (unspec): Define UNSPEC_SABDL,
UNSPEC_UABDL.
* config/aarch64/arm_neon.h (vabdl_s8): Reimplemet using
builtin.
(vabdl_s16): Likewise.
(vabdl_s32): Likewise.
(vabdl_u8): Likewise.
(vabdl_u16): Likewise.
(vabdl_u32): Likewise.
* config/aarch64/iterators.md (ABDL): New int iterator.
(sur): Handle UNSPEC_SABDL, UNSPEC_UABDL.

3 years agoDocument various BLOCK macros.
Martin Sebor [Mon, 1 Feb 2021 16:17:21 +0000 (09:17 -0700)]
Document various BLOCK macros.

gcc/ChangeLog:

* tree.h (BLOCK_VARS): Add comment.
(BLOCK_SUBBLOCKS): Same.
(BLOCK_SUPERCONTEXT): Same.
(BLOCK_ABSTRACT_ORIGIN): Same.
(inlined_function_outer_scope_p): Same.

3 years agoReset front end trees before they make it into the middle end (PR middle-end/97172).
Martin Sebor [Mon, 1 Feb 2021 16:08:21 +0000 (09:08 -0700)]
Reset front end trees before they make it into the middle end (PR middle-end/97172).

gcc/ChangeLog:

PR middle-end/97172
* attribs.c (attr_access::free_lang_data): Define new function.
* attribs.h (attr_access::free_lang_data): Declare new function.

gcc/c/ChangeLog:

PR middle-end/97172
* c-decl.c (free_attr_access_data): New function.
(c_parse_final_cleanups): Call free_attr_access_data.

gcc/testsuite/ChangeLog:

PR middle-end/97172
* gcc.dg/pr97172.c: New test.

3 years agolibstdc++: Update C++17 status table for <charconv>
Jonathan Wakely [Mon, 1 Feb 2021 15:39:24 +0000 (15:39 +0000)]
libstdc++: Update C++17 status table for <charconv>

libstdc++-v3/ChangeLog:

* doc/xml/manual/status_cxx2011.xml: Update std::call_once
status.
* doc/xml/manual/status_cxx2014.xml: Likewise.
* doc/xml/manual/status_cxx2017.xml: Likewise. Update
std::from_chars and std::to_chars status. Fix formatting.
* doc/html/manual/status.html: Regenerate.

3 years agoAvoid -Wstringop-truncation.
Martin Sebor [Mon, 1 Feb 2021 15:58:31 +0000 (08:58 -0700)]
Avoid -Wstringop-truncation.

libiberty/ChangeLog:

* dyn-string.c (dyn_string_insert_cstr): Use memcpy instead of strncpy
to avoid -Wstringop-truncation.

3 years agoFix statistic accounting for auto_vec and auto_bitmap
Richard Biener [Mon, 1 Feb 2021 14:41:19 +0000 (15:41 +0100)]
Fix statistic accounting for auto_vec and auto_bitmap

This fixes accounting issues with using auto_vec and auto_bitmap
for -fmem-report.

2021-02-01  Richard Biener  <rguenther@suse.de>

* vec.h (auto_vec::auto_vec): Add memory stat parameters
and pass them on.
* bitmap.h (auto_bitmap::auto_bitmap): Likewise.

3 years agoVerify a warning for a class with a ref-qualified assignment (PR c++/98835).
Martin Sebor [Mon, 1 Feb 2021 15:42:58 +0000 (08:42 -0700)]
Verify a warning for a class with a ref-qualified assignment (PR c++/98835).

gcc/testsuite/ChangeLog:
PR c++/98835
* g++.dg/Wclass-memaccess-6.C: New test.

3 years agoc++: Fix ICE from verify_ctor_sanity [PR98295]
Patrick Palka [Mon, 1 Feb 2021 15:27:45 +0000 (10:27 -0500)]
c++: Fix ICE from verify_ctor_sanity [PR98295]

In this testcase we're crashing during constexpr evaluation of the
ARRAY_REF b[0] as part of evaluation of the lambda's by-copy capture of b
(which is encoded as a VEC_INIT_EXPR<b>).  Since A's constexpr default
constructor is not yet defined, b's initialization is not actually
constant, but because A is an empty type, evaluation of b from
cxx_eval_array_ref is successful and yields an empty CONSTRUCTOR.
And since this CONSTRUCTOR is empty, we {}-initialize the desired array
element, and end up crashing from verify_ctor_sanity during evaluation
of this initializer because we updated new_ctx.ctor without updating
new_ctx.object: the former now has type A[3] and the latter is still the
target of a TARGET_EXPR for b[0][0] created from cxx_eval_vec_init
(and so has type A).

This patch fixes this by setting new_ctx.object appropriately at the
same time that we set new_ctx.ctor from cxx_eval_array_reference.

gcc/cp/ChangeLog:

PR c++/98295
* constexpr.c (cxx_eval_array_reference): Also set
new_ctx.object when setting new_ctx.ctor.

gcc/testsuite/ChangeLog:

PR c++/98295
* g++.dg/cpp0x/constexpr-98295.C: New test.

3 years agoc++: Improve sorry for __builtin_has_attribute [PR98355]
Marek Polacek [Fri, 29 Jan 2021 16:29:25 +0000 (11:29 -0500)]
c++: Improve sorry for __builtin_has_attribute [PR98355]

__builtin_has_attribute doesn't work in templates yet (bug 92104), so
in r11-471 I added a sorry.  But that only caught type-dependent
expressions and we also want to sorry on value-dependent expressions.
This patch uses uses_template_parms, but guarded with p_t_d, because
u_t_p sets p_t_d and then v_d_e_p considers variables with reference
types value-dependent, which breaks builtin-has-attribute-6.c.

This is a regression and I also plan to apply this to gcc-10.

gcc/cp/ChangeLog:

PR c++/98355
* parser.c (cp_parser_has_attribute_expression): Use
uses_template_parms instead of type_dependent_expression_p.

gcc/testsuite/ChangeLog:

PR c++/98355
* g++.dg/ext/builtin-has-attribute2.C: New test.

3 years agoc++: alias in qualified-id in template arg [PR98570]
Jason Merrill [Wed, 27 Jan 2021 22:15:39 +0000 (17:15 -0500)]
c++: alias in qualified-id in template arg [PR98570]

template_args_equal has handled dependent alias specializations for a while,
but in this testcase the actual template argument is a SCOPE_REF, so we
called cp_tree_equal, which doesn't handle aliases specially when we get to
them.

This patch generalizes this by setting a flag so structural_comptypes will
check for template alias equivalence (if we aren't doing partial ordering).
The existing flag, comparing_specializations, was too broad; in particular,
when we're doing decls_match, we want to treat corresponding parameters as
equivalent, so we need to separate that from alias comparison.  So I
introduce the comparing_dependent_aliases flag.

From looking at other uses of comparing_specializations, it seems to me that
the new flag is what modules wants, as well.

The other use of comparing_specializations in structural_comptypes is a hack
to deal with spec_hasher::equal not calling push_to_top_level, which we
also don't want to tie to the alias comparison semantics.

This patch also changes how we get to structural comparison of aliases from
checking TYPE_CANONICAL in comptypes to marking the aliases as getting
structural comparison when they are built, which is more consistent with how
e.g. typename is handled.

As I mention in the comment for comparing_dependent_aliases, I think the
default should be to treat different dependent aliases for the same type as
distinct, only treating them as equal during deduction (particularly partial
ordering).  But that's a matter for the C++ committee, to try in stage 1.

gcc/cp/ChangeLog:

PR c++/98570
* cp-tree.h: Declare it.
* pt.c (comparing_dependent_aliases): New flag.
(template_args_equal, spec_hasher::equal): Set it.
(dependent_alias_template_spec_p): Assert that we don't
get non-types other than error_mark_node.
(instantiate_alias_template): SET_TYPE_STRUCTURAL_EQUALITY
on complex alias specializations.  Set TYPE_DEPENDENT_P here.
(tsubst_decl): Not here.
* module.cc (module_state::read_cluster): Set
comparing_dependent_aliases instead of
comparing_specializations.
* tree.c (cp_tree_equal): Remove comparing_specializations
module handling.
* typeck.c (structural_comptypes): Adjust.
(comptypes): Remove comparing_specializations handling.

gcc/testsuite/ChangeLog:

PR c++/98570
* g++.dg/cpp0x/alias-decl-targ1.C: New test.

3 years agotestsuite: aarch64: Add tests for vmlXl_high intrinsics
Jonathan Wright [Sun, 31 Jan 2021 14:47:04 +0000 (14:47 +0000)]
testsuite: aarch64: Add tests for vmlXl_high intrinsics

Add tests for vmlal_high_* and vmlsl_high_* Neon intrinsics. Since
these intrinsics are only supported for AArch64, these tests are
restricted to only run on AArch64 targets.

gcc/testsuite/ChangeLog:

2021-01-31  Jonathan Wright  <jonathan.wright@arm.com>

* gcc.target/aarch64/advsimd-intrinsics/vmlXl_high.inc:
New test template.
* gcc.target/aarch64/advsimd-intrinsics/vmlXl_high_lane.inc:
New test template.
* gcc.target/aarch64/advsimd-intrinsics/vmlXl_high_laneq.inc:
New test template.
* gcc.target/aarch64/advsimd-intrinsics/vmlXl_high_n.inc:
New test.
* gcc.target/aarch64/advsimd-intrinsics/vmlal_high.c:
New test.
* gcc.target/aarch64/advsimd-intrinsics/vmlal_high_lane.c:
New test.
* gcc.target/aarch64/advsimd-intrinsics/vmlal_high_laneq.c:
New test.
* gcc.target/aarch64/advsimd-intrinsics/vmlal_high_n.c:
New test.
* gcc.target/aarch64/advsimd-intrinsics/vmlsl_high.c:
New test.
* gcc.target/aarch64/advsimd-intrinsics/vmlsl_high_lane.c:
New test.
* gcc.target/aarch64/advsimd-intrinsics/vmlsl_high_laneq.c:
New test.
* gcc.target/aarch64/advsimd-intrinsics/vmlsl_high_n.c:
New test.

3 years agotestsuite: aarch64: Add tests for vmull_high intrinsics
Jonathan Wright [Fri, 29 Jan 2021 00:45:30 +0000 (00:45 +0000)]
testsuite: aarch64: Add tests for vmull_high intrinsics

Add tests for vmull_high_* Neon intrinsics. Since these intrinsics
are only supported for AArch64, these tests are restricted to only
run on AArch64 targets.

gcc/testsuite/ChangeLog:

2021-01-29  Jonathan Wright  <jonathan.wright@arm.com>

* gcc.target/aarch64/advsimd-intrinsics/vmull_high.c:
New test.
* gcc.target/aarch64/advsimd-intrinsics/vmull_high_lane.c:
New test.
* gcc.target/aarch64/advsimd-intrinsics/vmull_high_laneq.c:
New test.
* gcc.target/aarch64/advsimd-intrinsics/vmull_high_n.c:
New test.

3 years agoAArch64: Change canonization of smlal and smlsl in order to be able to optimize the...
Tamar Christina [Mon, 1 Feb 2021 13:50:43 +0000 (13:50 +0000)]
AArch64: Change canonization of smlal and smlsl in order to be able to optimize the vec_dup

g:87301e3956d44ad45e384a8eb16c79029d20213a and
g:ee4c4fe289e768d3c6b6651c8bfa3fdf458934f4 changed the intrinsics to be
proper RTL but accidentally ended up creating a regression because of the
ordering in the RTL pattern.

The existing RTL that combine should try to match to remove the vec_dup is
aarch64_vec_<su>mlal_lane<Qlane> and aarch64_vec_<su>mult_lane<Qlane> which
expects the select register to be the second operand of mult.

The pattern introduced has it as the first operand so combine was unable to
remove the vec_dup.  This flips the order such that the patterns optimize
correctly.

gcc/ChangeLog:

* config/aarch64/aarch64-simd.md (aarch64_<su>mlal_n<mode>,
aarch64_<su>mlsl<mode>, aarch64_<su>mlsl_n<mode>): Flip mult operands.

gcc/testsuite/ChangeLog:

* gcc.target/aarch64/advsimd-intrinsics/smlal-smlsl-mull-optimized.c: New test.

3 years agoc++: Add testcase for PR84494
Patrick Palka [Mon, 1 Feb 2021 13:48:46 +0000 (08:48 -0500)]
c++: Add testcase for PR84494

We correctly accept this testcase ever since r10-5143.

gcc/testsuite/ChangeLog:

PR c++/84494
* g++.dg/cpp1y/constexpr-84494.C: New test.

3 years agoRISC-V: Fix gcc.target/riscv/attribute-18.c
Xing GUO [Mon, 1 Feb 2021 09:33:47 +0000 (17:33 +0800)]
RISC-V: Fix gcc.target/riscv/attribute-18.c

gcc/testsuite/ChangeLog:

* gcc.target/riscv/attribute-18.c: Add -mriscv-attribute option.

3 years agortl-optimization/98863 - prune RD with LIVE in STV
Richard Biener [Mon, 1 Feb 2021 08:18:43 +0000 (09:18 +0100)]
rtl-optimization/98863 - prune RD with LIVE in STV

This sets DF_RD_PRUNE_DEAD_DEFS like all other uses of the UD/DU
chain problems which makes the RD problem consume a lot less memory.

2021-02-01  Richard Biener  <rguenther@suse.de>

PR rtl-optimization/98863
* config/i386/i386-features.c (convert_scalars_to_vector):
Set DF_RD_PRUNE_DEAD_DEFS.

3 years agotestsuite: Update pr79251 ilp32 store regex
Xionghu Luo [Mon, 1 Feb 2021 02:29:14 +0000 (20:29 -0600)]
testsuite: Update pr79251 ilp32 store regex

BE ilp32 Linux generates extra stack stwu instructions which shouldn't
be counted in, \m … \M is needed around each instruction, not just the
beginning and end of the entire pattern.

gcc/testsuite/ChangeLog:

2021-02-01  Xionghu Luo  <luoxhu@linux.ibm.com>

* gcc.target/powerpc/pr79251.p8.c: Update store count regex.
* gcc.target/powerpc/pr79251.p9.c: Likewise.

3 years agoDaily bump.
GCC Administrator [Mon, 1 Feb 2021 00:16:20 +0000 (00:16 +0000)]
Daily bump.

3 years agoAdd missing definition of SIZE_MAX
Eric Botcazou [Sun, 31 Jan 2021 22:23:31 +0000 (23:23 +0100)]
Add missing definition of SIZE_MAX

If the stdint.h system file follows the ISO C99 specification, it might
not define SIZE_MAX in C++ by default, so provide a local fallback.

gcc/
* system.h (SIZE_MAX): Define if not already defined.

3 years agotestsuite, Darwin : Skip ELF-specific tests.
Iain Sandoe [Sun, 31 Jan 2021 12:24:44 +0000 (12:24 +0000)]
testsuite, Darwin : Skip ELF-specific tests.

A number of ELF-specific tests were introduced in r11-6140, one
of which fails on all Mach-O/Darwin platforms.

On examination, the tests have no meaningful parallel for Mach-O
which dead strips at the symbol level, and does not make use of
function sections (the fact that a used and an unused symbol are
placed in the same section will not affect dead stripping).

Given that the tests do not demonstrate anything useful on Darwin,
skip them.

gcc/testsuite/ChangeLog:

* c-c++-common/attr-used-5.c: Skip for Darwin.
* c-c++-common/attr-used-6.c: Likewise.
* c-c++-common/attr-used-7.c: Likewise.
* c-c++-common/attr-used-8.c: Likewise.
* c-c++-common/attr-used-9.c: Likewise.

3 years agoDaily bump.
GCC Administrator [Sun, 31 Jan 2021 00:16:20 +0000 (00:16 +0000)]
Daily bump.

3 years agotestsuite: Update pr79251 ilp32 store counts.
David Edelsohn [Sat, 30 Jan 2021 18:31:53 +0000 (13:31 -0500)]
testsuite: Update pr79251 ilp32 store counts.

With the recent changes to vector insert optimization, the number of
expected stores for the two testcases has changed.

gcc/testsuite/ChangeLog:

* gcc.target/powerpc/pr79251.p8.c: Update ilp32 store counts.
* gcc.target/powerpc/pr79251.p9.c: Same.

3 years agoFusion patterns for logical-logical
Aaron Sawdey [Tue, 8 Dec 2020 18:07:04 +0000 (12:07 -0600)]
Fusion patterns for logical-logical

This patch adds a new function to genfusion.pl to generate patterns for
logical-logical fusion. They are enabled by default for power10 and can
be disabled by -mno-power10-fusion-2logical or -mno-power10-fusion.

gcc/ChangeLog
* config/rs6000/genfusion.pl (gen_2logical): New function to
generate patterns for logical-logical fusion.
* config/rs6000/fusion.md: Regenerated patterns.
* config/rs6000/rs6000-cpus.def: Add
OPTION_MASK_P10_FUSION_2LOGICAL.
* config/rs6000/rs6000.c (rs6000_option_override_internal):
Enable logical-logical fusion for p10.
* config/rs6000/rs6000.opt: Add -mpower10-fusion-2logical.

3 years agoaix: add periods to option explanation.
David Edelsohn [Sat, 30 Jan 2021 18:28:13 +0000 (13:28 -0500)]
aix: add periods to option explanation.

gcc/ChangeLog:

* config/rs6000/rs6000.opt: Add periods to new AIX options.

3 years agoaix: Permit use of AIX Vector extended ABI mode
David Edelsohn [Wed, 27 Jan 2021 21:47:22 +0000 (16:47 -0500)]
aix: Permit use of AIX Vector extended ABI mode

AIX only permits use of Altivec VSRs 20-31 in a Vector Extended ABI mode.
This patch explicitly enables use of the VSRs using the new -mabi=vec-extabi
command line option also implemented in LLVM for AIX.

Bootstrapped on powerpc-ibm-aix7.2.3.0 and powerpc64le-linux-gnu.

gcc/ChangeLog:

* config/rs6000/rs6000.opt (mabi=vec-extabi): New.
(mabi=vec-default): New.
* config/rs6000/rs6000-c.c (rs6000_target_modify_macros): Define
__EXTABI__ for AIX Vector extended ABI.
* config/rs6000/rs6000.c (rs6000_debug_reg_global): Print AIX Vector
extabi info.
(conditional_register_usage): If AIX vec_extabi enabled, vs20-vs31
are non-volatile.
* doc/invoke.texi (PowerPC mabi): Add AIX vec-extabi and vec-default.

3 years agolibphobos: Synchronize libdruntime bindings with upstream druntime
Iain Buclaw [Thu, 28 Jan 2021 10:18:42 +0000 (11:18 +0100)]
libphobos: Synchronize libdruntime bindings with upstream druntime

Reviewed-on: https://github.com/dlang/druntime/pull/3348

gcc/d/ChangeLog:

* typeinfo.cc (TypeInfoVisitor::visit (TypeInfoDeclaration *)): Don't
layout m_arg1 and m_arg2 fields.

libphobos/ChangeLog:

* Makefile.in: Regenerate.
* configure: Regenerate.
* libdruntime/MERGE: Merge upstream druntime e4aae28e.
* libdruntime/Makefile.am (DRUNTIME_DSOURCES): Refresh module list.
(DRUNTIME_DSOURCES_BIONIC): Add core/sys/bionic/err.d.
(DRUNTIME_DSOURCES_DARWIN): Add core/sys/darwin/err.d,
core/sys/darwin/ifaddrs.d, core/sys/darwin/mach/nlist.d,
core/sys/darwin/mach/stab.d, and core/sys/darwin/sys/attr.d.
(DRUNTIME_DSOURCES_DRAGONFLYBSD): Add core/sys/dragonflybsd/err.d.
(DRUNTIME_DSOURCES_FREEBSD): Add core/sys/freebsd/err.d.
(DRUNTIME_DSOURCES_LINUX): Add core/sys/linux/err.d.
(DRUNTIME_DSOURCES_NETBSD): Add core/sys/netbsd/err.d.
(DRUNTIME_DSOURCES_OPENBSD): Add core/sys/openbsd/err.d.
(DRUNTIME_DSOURCES_POSIX): Add core/sys/posix/locale.d,
core/sys/posix/stdc/time.d, core/sys/posix/string.d, and
core/sys/posix/strings.d.
(DRUNTIME_DSOURCES_SOLARIS): Add core/sys/solaris/err.d.
(DRUNTIME_DSOURCES_WINDOWS): Add core/sys/windows/sdkddkver.d,
and core/sys/windows/stdc/time.d
* libdruntime/Makefile.in: Regenerate.
* libdruntime/gcc/sections/elf_shared.d (sizeofTLS): New function.
* testsuite/libphobos.thread/fiber_guard_page.d: Use
__traits(getMember) to get internal fields.

3 years agoi386, df: Fix up gcc.c-torture/compile/20051216-1.c -O1 -march=cascadelake
Jakub Jelinek [Sat, 30 Jan 2021 13:58:14 +0000 (14:58 +0100)]
i386, df: Fix up gcc.c-torture/compile/20051216-1.c -O1 -march=cascadelake

>     rtl-optimization/98863 - tame i386 specific RPAD pass
>
> caused
>
> FAIL: gcc.c-torture/compile/20051216-1.c   -O1  (internal compiler error)
> FAIL: gcc.c-torture/compile/20051216-1.c   -O1  (test for excess errors)

The problem is that we don't revert the df flags back.
This patch fixes it by clearing DF_DEFER_INSN_RESCAN after
calling df_process_deferred_rescans, so that it doesn't leak into following
unprepared passes that expect non-deferred rescans.

2021-01-30  Jakub Jelinek  <jakub@redhat.com>

* config/i386/i386-features.c (remove_partial_avx_dependency): Clear
DF_DEFER_INSN_RESCAN after calling df_process_deferred_rescans.

* gcc.target/i386/20051216-1.c: New test.

3 years agotestsuite: Fix up gomp/simd-{2,3}.c tests [PR98243]
Jakub Jelinek [Sat, 30 Jan 2021 09:52:57 +0000 (10:52 +0100)]
testsuite: Fix up gomp/simd-{2,3}.c tests [PR98243]

The test (intentionally) is not gcc.dg/vect/, as it needs -fopenmp and uses
OpenMP directives other than simd and therefore can't rely on default
VECTFLAGS and so I think can't safely use vect_int effective target
either.  So, I'm just making sure it is vectorized on x86 and on aarch64 (the
latter as an example of a target that doesn't need any extra options to get
the vectorization).

2021-01-30  Jakub Jelinek  <jakub@redhat.com>

PR testsuite/98243
* gcc.dg/gomp/simd-2.c: Add -msse2 on x86.  Restrict
scan-tree-dump-times to x86 and aarch64 targets.
* gcc.dg/gomp/simd-3.c: Likewise.

3 years agoDaily bump.
GCC Administrator [Sat, 30 Jan 2021 00:16:19 +0000 (00:16 +0000)]
Daily bump.

3 years agointernal/cpu: correctly link to getsystemcfg
Clément Chigot [Fri, 29 Jan 2021 15:27:39 +0000 (16:27 +0100)]
internal/cpu: correctly link to getsystemcfg

Directly set getsystemcfg as //extern in internal/cpu instead of
trying to use the runtime as in Go toolchain.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/287932

3 years agoPR testsuite/98870: Fix IEEE 128-bit fortran test
Michael Meissner [Fri, 29 Jan 2021 22:44:54 +0000 (17:44 -0500)]
PR testsuite/98870: Fix IEEE 128-bit fortran test

This test started failing when I changed the mapping of IEEE 128-bit long
double built-in functions on 2021-01-28.  This patch fixes the test so it
uses the correct name.

gcc/testsuite/
2021-01-29  Michael Meissner  <meissner@linux.ibm.com>

PR testsuite/98870
* gcc.target/powerpc/ppc-fortran/ieee128-math.f90: Fix the
expected result.

3 years ago[PATCH, rs6000] Fix typo in gcc.target/pr91903.c dg-require stanza
Will Schmidt [Fri, 29 Jan 2021 22:24:47 +0000 (16:24 -0600)]
[PATCH, rs6000] Fix typo in gcc.target/pr91903.c dg-require stanza

Fix obvious typo in testcases dg-require stanza.

2021-01-29  Will Schmidt <will_schmidt@vnet.ibm.como>

gcc/testsuite/ChangeLog:
* gcc.target/powerpc/pr91903.c: Fix dg-require stanza.

3 years ago[PR97701] Modify test for trunk
Vladimir N. Makarov [Fri, 29 Jan 2021 21:04:03 +0000 (16:04 -0500)]
[PR97701] Modify test for trunk

Original test was for gcc-10.  The modified one for trunk.

gcc/testsuite/ChangeLog:

PR target/97701
* gcc.target/aarch64/pr97701.c: Modify.

3 years agoanalyzer: consolidate conditionals in paths
David Malcolm [Fri, 29 Jan 2021 20:12:24 +0000 (15:12 -0500)]
analyzer: consolidate conditionals in paths

This patch adds a simplification to analyzer paths for
repeated CFG edges generated from compound conditionals.
For example, it simplifies:

    |    5 |   if (a && b && c)
    |      |      ^~~~~~~~~~~~
    |      |      |  |    |
    |      |      |  |    (4) ...to here
    |      |      |  |    (5) following ‘true’ branch (when ‘c != 0’)...
    |      |      |  (2) ...to here
    |      |      |  (3) following ‘true’ branch (when ‘b != 0’)...
    |      |      (1) following ‘true’ branch (when ‘a != 0’)...
    |    6 |     __analyzer_dump_path ();
    |      |     ~~~~~~~~~~~~~~~~~~~~~~~
    |      |     |
    |      |     (6) ...to here

to:

    |    5 |   if (a && b && c)
    |      |      ^
    |      |      |
    |      |      (1) following ‘true’ branch...
    |    6 |     __analyzer_dump_path ();
    |      |     ~~~~~~~~~~~~~~~~~~~~~~~
    |      |     |
    |      |     (2) ...to here

gcc/analyzer/ChangeLog:
* checker-path.cc (event_kind_to_string): Handle
EK_START_CONSOLIDATED_CFG_EDGES and
EK_END_CONSOLIDATED_CFG_EDGES.
(start_consolidated_cfg_edges_event::get_desc): New.
(checker_path::cfg_edge_pair_at_p): New.
* checker-path.h (enum event_kind): Add
EK_START_CONSOLIDATED_CFG_EDGES and
EK_END_CONSOLIDATED_CFG_EDGES.
(class start_consolidated_cfg_edges_event): New class.
(class end_consolidated_cfg_edges_event): New class.
(checker_path::delete_events): New.
(checker_path::replace_event): New.
(checker_path::cfg_edge_pair_at_p): New decl.
* diagnostic-manager.cc (diagnostic_manager::prune_path): Call
consolidate_conditions.
(same_line_as_p): New.
(diagnostic_manager::consolidate_conditions): New.
* diagnostic-manager.h
(diagnostic_manager::consolidate_conditions): New decl.

gcc/testsuite/ChangeLog:
* gcc.dg/analyzer/combined-conditionals-1.c: New test.

3 years ago[PR97701] LRA: Don't narrow class only for REG or MEM.
Vladimir N. Makarov [Fri, 29 Jan 2021 16:51:44 +0000 (11:51 -0500)]
[PR97701] LRA: Don't narrow class only for REG or MEM.

Reload pseudos of ALL_REGS class did not narrow class from constraint
in insn (set (pseudo) (lo_sum ...)) because lo_sum is considered an
object (OBJECT_P) although the insn is not a classic move.  To permit
narrowing we are starting to use MEM_P and REG_P instead of OBJECT_P.

gcc/ChangeLog:

PR target/97701
* lra-constraints.c (in_class_p): Don't narrow class only for REG
or MEM.

gcc/testsuite/ChangeLog:

PR target/97701
* gcc.target/aarch64/pr97701.c: New.

3 years agolibgo: update to Go1.16rc1
Ian Lance Taylor [Thu, 28 Jan 2021 01:55:50 +0000 (17:55 -0800)]
libgo: update to Go1.16rc1

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/287493

3 years ago[PATCH, rs6000] improve vec_ctf invalid parameter handling.
Will Schmidt [Fri, 23 Oct 2020 22:28:17 +0000 (17:28 -0500)]
[PATCH, rs6000] improve vec_ctf invalid parameter handling.

Hi,
  Per PR91903, GCC ICEs when we attempt to pass a variable
(or out of range value) into the vec_ctf() builtin.  Per
investigation, the parameter checking exists for this
builtin with the int types, but was missing for
the long long types. This problem also occurs for the
vec_cts() builtin, which is also fixed by this patch.

This patch adds the missing CODE_FOR_* entries to the
rs6000_expand_binup_builtin to cover that scenario.
This patch also updates some existing tests to remove
calls to vec_ctf() and vec_cts() that contain negative
values.

PR target/91903

2020-01-29  Will Schmidt  <will_schmidt@vnet.ibm.com>

gcc/ChangeLog:
* config/rs6000/rs6000-call.c (rs6000_expand_binup_builtin): Add
clauses for CODE_FOR_vsx_xvcvuxddp_scale and
CODE_FOR_vsx_xvcvsxddp_scale to the parameter checking code.

gcc/testsuite/ChangeLog:
* gcc.target/powerpc/pr91903.c: New test.
* gcc.target/powerpc/builtins-1.fold.h: Update.
* gcc.target/powerpc/builtins-2.c: Update.

3 years agoc++: Fix unordered entity array [PR 98843]
Nathan Sidwell [Fri, 29 Jan 2021 16:30:40 +0000 (08:30 -0800)]
c++: Fix unordered entity array [PR 98843]

A couple of module invariants are that the modules are always
allocated in ascending order and appended to the module array.  The
entity array is likewise ordered, with each module having spans in
that array in ascending order.  Prior to header-units, this was
provided by the way import declarations were encountered.  With
header-units we need to load the preprocessor state of header units
before we parse the C++, and this can lead to incorrect ordering of
the entity array.  I had made the initialization of a module's
language state a little too lazy.  This moves the allocation of entity
array spans into the initial read of a module, thus ensuring the
ordering of those spans.  We won't be looking in them until we've
loaded the language portions of that particular module, and even if we
did, we'd find NULLs there and issue a diagnostic.

PR c++/98843
gcc/cp/
* module.cc (module_state_config): Add num_entities field.
(module_state::read_entities): The entity_ary span is
already allocated.
(module_state::write_config): Write num_entities.
(module_state::read_config): Read num_entities.
(module_state::write): Set config's num_entities.
(module_state::read_initial): Allocate the entity ary
span here.
(module_state::read_language): Do not set entity_lwm
here.
gcc/testsuite/
* g++.dg/modules/pr98843_a.C: New.
* g++.dg/modules/pr98843_b.H: New.
* g++.dg/modules/pr98843_c.C: New.

3 years agotree-optimization/98866 - Compile time hog in VRP
Andrew MacLeod [Fri, 29 Jan 2021 14:23:48 +0000 (09:23 -0500)]
tree-optimization/98866 - Compile time hog in VRP

Don't track [1, +INF] for pointer types, treat them as invariant for caching
purposes as they cannot be further refined without evaluating to UNDEFINED.

PR tree-optimization/98866
* gimple-range-gori.h (gori_compute:set_range_invariant): New.
* gimple-range-gori.cc (gori_map::set_range_invariant): New.
(gori_map::m_maybe_invariant): Rename from all_outgoing.
(gori_map::gori_map): Rename all_outgoing to m_maybe_invariant.
(gori_map::is_export_p): Ditto.
(gori_map::calculate_gori): Ditto.
(gori_compute::set_range_invariant): New.
* gimple-range.cc (gimple_ranger::range_of_stmt): Set range
invariant for pointers evaluating to [1, +INF].

3 years agortl-optimization/98863 - tame i386 specific RPAD pass
Richard Biener [Fri, 29 Jan 2021 15:02:36 +0000 (16:02 +0100)]
rtl-optimization/98863 - tame i386 specific RPAD pass

This removes analyzing DF with expensive problems which we do not
use at all and which somehow cause 5GB of memory to leak.  Instead
just do a defered rescan of added insns.

2021-01-29  Richard Biener  <rguenther@suse.de>

PR rtl-optimization/98863
* config/i386/i386-features.c (remove_partial_avx_dependency):
Do not perform DF analysis.
(pass_data_remove_partial_avx_dependency): Remove
TODO_df_finish.

3 years agoaarch64: Use RTL builtins for [su]mull_n intrinsics
Jonathan Wright [Tue, 19 Jan 2021 22:44:24 +0000 (22:44 +0000)]
aarch64: Use RTL builtins for [su]mull_n intrinsics

Rewrite [su]mull_n Neon intrinsics to use RTL builtins rather than
inline assembly code, allowing for better scheduling and
optimization.

gcc/ChangeLog:

2021-01-19  Jonathan Wright  <jonathan.wright@arm.com>

* config/aarch64/aarch64-simd-builtins.def: Add [su]mull_n
builtin generator macros.
* config/aarch64/aarch64-simd.md (aarch64_<su>mull_n<mode>):
Define.
* config/aarch64/arm_neon.h (vmull_n_s16): Use RTL builtin
instead of inline asm.
(vmull_n_s32): Likewise.
(vmull_n_u16): Likewise.
(vmull_n_u32): Likewise.

3 years agoaarch64: Reimplement vabdl_high* intrinsics using builtins
Kyrylo Tkachov [Fri, 29 Jan 2021 13:10:46 +0000 (13:10 +0000)]
aarch64: Reimplement vabdl_high* intrinsics using builtins

This patch reimplements the vabdl_high intrinsics using builtins.
It slightly cleans up the RTL pattern (the mode iterators) but nothing
interesting apart from that.

gcc/ChangeLog:

* config/aarch64/aarch64-simd-builtins.def (sabdl2, uabdl2):
Define builtins.
* config/aarch64/aarch64-simd.md (aarch64_<sur>abdl2<mode>_3):
Rename to...
(aarch64_<sur>abdl2<mode>): ... This.
(<sur>sadv16qi): Adjust use of above.
* config/aarch64/arm_neon.h (vabdl_high_s8): Reimplement using
builtin.
(vabdl_high_s16): Likewise.
(vabdl_high_s32): Likewise.
(vabdl_high_u8): Likewise.
(vabdl_high_u16): Likewise.
(vabdl_high_u32): Likewise.

3 years agoaarch64: Re-implement vabal_high* intrinsics using builtins
Kyrylo Tkachov [Fri, 29 Jan 2021 11:22:47 +0000 (11:22 +0000)]
aarch64: Re-implement vabal_high* intrinsics using builtins

This patch reimplements the vabal_high* intrinsics using RTL builtins.
It's straightforward, defining new unspecs and a new pattern.

gcc/ChangeLog:

* config/aarch64/aarch64-simd-builtins.def (sabal2): Define
builtin.
(uabal2): Likewise.
* config/aarch64/aarch64-simd.md (aarch64_<sur>abal2<mode>): New
pattern.
* config/aarch64/aarch64.md (unspec): Add UNSPEC_SABAL2 and
UNSPEC_UABAL2.
* config/aarch64/arm_neon.h (vabal_high_s8): Reimplement using
builtin.
(vabal_high_s16): Likewise.
(vabal_high_s32): Likewise.
(vabal_high_u8): Likewise.
(vabal_high_u16): Likewise.
(vabal_high_u32): Likewise.
* config/aarch64/iterators.md (ABAL2): New mode iterator.
(sur): Handle UNSPEC_SABAL2, UNSPEC_UABAL2.

3 years agoaarch64: Reimplement vabal* intrinsics using builtins
Kyrylo Tkachov [Fri, 29 Jan 2021 10:57:44 +0000 (10:57 +0000)]
aarch64: Reimplement vabal* intrinsics using builtins

This patch reimplements the vabal intrinsics with builtins.
The RTL pattern is cleaned up to emit the right .8b suffixes for the
inputs (though .16b is also accepted)
and iterate over the right modes. The pattern's only other use is
through the sadv16qi expander, which is adjusted.

I've verified that the codegen for sadv16qi is not worse off.

gcc/ChangeLog:

* config/aarch64/aarch64-simd-builtins.def (sabal): Define
builtin.
(uabal): Likewise.
* config/aarch64/aarch64-simd.md (aarch64_<sur>abal<mode>_4):
Rename to...
(aarch64_<sur>abal<mode>): ... This
(<sur>sadv16qi): Adust use of the above.
* config/aarch64/arm_neon.h (vabal_s8): Reimplement using
builtin.
(vabal_s16): Likewise.
(vabal_s32): Likewise.
(vabal_u8): Likewise.
(vabal_u16): Likewise.
(vabal_u32): Likewise.

3 years agoaarch64: Reimplement vaddlv* intrinsics using builtins
Kyrylo Tkachov [Thu, 28 Jan 2021 13:10:07 +0000 (13:10 +0000)]
aarch64: Reimplement vaddlv* intrinsics using builtins

This patch reimplements the vaddlv* intrinsics using builtins.
The vaddlv_s32 and vaddlv_u32 intrinsics actually perform a pairwise
SADDLP/UADDLP instead of a SADDLV/UADDLV but because they only use
two elements it has the same semantics.

gcc/ChangeLog:

* config/aarch64/aarch64-simd-builtins.def (saddlv, uaddlv):
Define builtins.
* config/aarch64/aarch64-simd.md (aarch64_<su>addlv<mode>):
Define.
* config/aarch64/arm_neon.h (vaddlv_s8): Reimplement using
builtin.
(vaddlv_s16): Likewise.
(vaddlv_u8): Likewise.
(vaddlv_u16): Likewise.
(vaddlvq_s8): Likewise.
(vaddlvq_s16): Likewise.
(vaddlvq_s32): Likewise.
(vaddlvq_u8): Likewise.
(vaddlvq_u16): Likewise.
(vaddlvq_u32): Likewise.
(vaddlv_s32): Likewise.
(vaddlv_u32): Likewise.
* config/aarch64/iterators.md (VDQV_L): New mode iterator.
(unspec): Add UNSPEC_SADDLV, UNSPEC_UADDLV.
(Vwstype): New mode attribute.
(Vwsuf): Likewise.
(VWIDE_S): Likewise.
(USADDLV): New int iterator.
(su): Handle UNSPEC_SADDLV, UNSPEC_UADDLV.

gcc/testsuite/ChangeLog:

* gcc.target/aarch64/simd/vaddlv_1.c: New test.

3 years agoaarch64: Use RTL builtins for [su]mlsl_lane[q] intrinsics
Jonathan Wright [Thu, 28 Jan 2021 12:46:37 +0000 (12:46 +0000)]
aarch64: Use RTL builtins for [su]mlsl_lane[q] intrinsics

Rewrite [su]mlsl_lane[q] Neon intrinsics to use RTL builtins rather
than inline assembly code, allowing for better scheduling and
optimization.

gcc/ChangeLog:

2021-01-28  Jonathan Wright  <jonathan.wright@arm.com>

* config/aarch64/aarch64-simd-builtins.def: Add [su]mlsl_lane[q]
builtin generator macros.
* config/aarch64/aarch64-simd.md (aarch64_vec_<su>mlsl_lane<Qlane>):
Define.
* config/aarch64/arm_neon.h (vmlsl_lane_s16): Use RTL builtin
instead of inline asm.
(vmlsl_lane_s32): Likewise.
(vmlsl_lane_u16): Likewise.
(vmlsl_lane_u32): Likewise.
(vmlsl_laneq_s16): Likewise.
(vmlsl_laneq_s32): Likewise.
(vmlsl_laneq_u16): Likewise.
(vmlsl_laneq_u32): Likewise.

3 years agochange unit of --param max-gcse-memory to kB
Richard Biener [Fri, 29 Jan 2021 12:58:28 +0000 (13:58 +0100)]
change unit of --param max-gcse-memory to kB

This changes it from bytes to kB since its value is limited to
2147483648.

2021-01-29  Richard Biener  <rguenther@suse.de>

* doc/invoke.texi (--param max-gcse-memory): Document unit
of size.
* gcse.c (gcse_or_cprop_is_too_expensive): Adjust.
* params.opt (--param max-gcse-memory): Adjust default and
document unit of size.

3 years agortl-optimization/98863 - fix PRE/CPROP memory usage check
Richard Biener [Fri, 29 Jan 2021 12:25:49 +0000 (13:25 +0100)]
rtl-optimization/98863 - fix PRE/CPROP memory usage check

This fixes overflow of the memory usage estimate in turn failing
to disable itself on WRF with LTO, causing a few GBs worth of
memory peak.

2021-01-29  Richard Biener  <rguenther@suse.de>

PR rtl-optimization/98863
* gcse.c (gcse_or_cprop_is_too_expensive): Use unsigned
HOST_WIDE_INT for the memory estimate.

3 years agotree-optimization/97627 - Avoid computing niters for fake edges
Richard Biener [Fri, 29 Jan 2021 10:17:42 +0000 (11:17 +0100)]
tree-optimization/97627 - Avoid computing niters for fake edges

This avoids computing niters information for fake edges.

2021-01-29  Bin Cheng  <bin.cheng@linux.alibaba.com>
    Richard Biener  <rguenther@suse.de>

PR tree-optimization/97627
* tree-ssa-loop-niter.c (number_of_iterations_exit_assumptions):
Do not analyze fake edges.

* g++.dg/pr97627.C: New testcase.

3 years agortl-optimization/98144 - tame REE memory usage
Richard Biener [Fri, 29 Jan 2021 09:23:40 +0000 (10:23 +0100)]
rtl-optimization/98144 - tame REE memory usage

This changes the REE dataflow to change the explicit all-ones
starting solution to be implicit via a visited flag, removing
the need to initially start with fully populated bitmaps for
all basic-blocks.  That reduces peak memory use when compiling
the RTL checking enabled insn-extract.c testcase from PR98144
from 6GB to less than 2GB.

2021-01-29  Richard Biener  <rguenther@suse.de>

PR rtl-optimization/98144
* df.h (df_mir_bb_info): Add con_visited member.
* df-problems.c (df_mir_alloc): Initialize con_visited,
do not fully populate IN and OUT.
(df_mir_reset): Likewise.
(df_mir_confluence_0): Set con_visited.
(df_mir_confluence_n): Properly handle implicitely
fully populated IN and OUT as designated by con_visited
and update con_visited accordingly.

3 years agoarm: Fix up -mcpu=iwmmxt ICEs [PR98849]
Jakub Jelinek [Fri, 29 Jan 2021 10:54:22 +0000 (11:54 +0100)]
arm: Fix up -mcpu=iwmmxt ICEs [PR98849]

The
https://gcc.gnu.org/r11-6707-g7432f255b70811dafaf325d94036ac580891de69
https://gcc.gnu.org/r11-6708-gbfab355012ca0f5219da8beb04f2fdaf757d34b7
changes moved the vashl/vashr/vlshr expanders from neon.md to vec-common.md
and changed their condition from TARGET_NEON to ARM_HAVE_<MODE>_ARITH,
so that they apply also for TARGET_HAVE_MVE.  But, the ARM_HAVE_<MODE>_ARITH
macros are sometimes true also for TARGET_REALLY_IWMMXT, which at least
from quick skimming of former iwmmxt*.md doesn't have such instructions,
so it seems incorrect to enable them for iwmmxt.  Furthermore, even if it
had them, iwmmxt doesn't support any way to broadcast values in those
modes (vec_duplicate and vec_init optabs) and the middle end relies on
if the vector x vector shift/rotate patterns are supported it can emit
vector x scalar shift/rotate by broadcasting the shift amount to a vector.

As the TARGET_NEON vs. TARGET_REALLY_IWMMXT vs. TARGET_HAVE_MVE never seem
to be enabled together, I think we can just write it the following way.

Note, seems iwmmxt actually does support vector x scalar shifts, but doesn't
really enable the optabs that would tell the middle-end code that it does
(and neon and mve don't seem to support those).  I'll defer that to anybody
that cares about iwmmxt (if any).

2021-01-29  Jakub Jelinek  <jakub@redhat.com>

PR target/98849
* config/arm/vec-common.md (mve_vshlq_<supf><mode>,
vashl<mode>3, vashr<mode>3, vlshr<mode>3): Add
&& !TARGET_REALLY_IWMMXT to conditions.

* gcc.c-torture/compile/pr98849.c: New test.

3 years agoexpand: Fix up find_bb_boundaries [PR98331]
Jakub Jelinek [Fri, 29 Jan 2021 09:30:09 +0000 (10:30 +0100)]
expand: Fix up find_bb_boundaries [PR98331]

When expansion emits some control flow insns etc. inside of a former GIMPLE
basic block, find_bb_boundaries needs to split it into multiple basic
blocks.
The code needs to ignore debug insns in decisions how many splits to do or
where in between some non-debug insns the split should be done, but it can
decide where to put debug insns if they can be kept and otherwise throws
them away (they can't stay outside of basic blocks).
On the following testcase, we end up in the bb from expander with
control flow insn
debug insns
barrier
some other insn
(the some other insn is effectively dead after __builtin_unreachable and
we'll optimize that out later).
Without debug insns, we'd do the split when encountering some other insn
and split after PREV_INSN (some other insn), i.e. after barrier (and the
splitting code then moves the barrier in between basic blocks).
But if there are debug insns, we actually split before the first debug insn
that appeared after the control flow insn, so after control flow insn,
and get a basic block that starts with debug insns and then has a barrier
in the middle that nothing moves it out of the bb.  This leads to ICEs and
even if it wouldn't, different behavior from -g0.
The reason for treating debug insns that way is a different case, e.g.
control flow insn
debug insns
some other insn
or even
control flow insn
barrier
debug insns
some other insn
where splitting before the first such debug insn allows us to keep them
while otherwise we would have to drop them on the floor, and in those
situations we behave the same with -g0 and -g.

So, the following patch fixes it by resetting debug_insn not just when
splitting the blocks (it is set only after seeing a control flow insn and
before splitting for it if needed), but also when seeing a barrier,
which effectively means we always throw away debug insns after a control
flow insn and before following barrier if any, but there is no way around
that, control flow insn must be the last in the bb (BB_END) and BARRIER
after it, debug insns aren't allowed outside of bb.
We still handle the other cases fine (when there is no barrier or when
debug insns appear only after the barrier).

2021-01-29  Jakub Jelinek  <jakub@redhat.com>

PR debug/98331
* cfgbuild.c (find_bb_boundaries): Reset debug_insn when seeing
a BARRIER.

* gcc.dg/pr98331.c: New test.

3 years agotestsuite: Run vec_insert case on P8 and P9 with option specified
Xionghu Luo [Fri, 29 Jan 2021 02:47:07 +0000 (20:47 -0600)]
testsuite: Run vec_insert case on P8 and P9 with option specified

Move run_test and TEST_VEC_INSERT_ALL to header file for share usage.

gcc/testsuite/ChangeLog:

2021-01-29  Xionghu Luo  <luoxhu@linux.ibm.com>

* gcc.target/powerpc/pr79251.p8.c: Move TEST_VEC_INSERT_ALL
to ...
* gcc.target/powerpc/pr79251.h: ...this.
* gcc.target/powerpc/pr79251.p9.c: Likewise.
* gcc.target/powerpc/pr79251-run.c: Move run_test to pr79251.h.
Rename to...
* gcc.target/powerpc/pr79251-run.p8.c: ...this.
* gcc.target/powerpc/pr79251-run.p9.c: New test.

3 years agoc++: Fix infinite looping with invalid operator [PR96137]
Marek Polacek [Fri, 29 Jan 2021 03:18:32 +0000 (22:18 -0500)]
c++: Fix infinite looping with invalid operator [PR96137]

My r11-86 adjusted cp_parser_class_name to do

-  scope = parser->scope;
+  scope = parser->scope ? parser->scope : parser->context->object_type;
   if (scope == error_mark_node)
     return error_mark_node;

but that caused endless looping in cp_parser_type_specifier_seq (the
while (true) loop) in this invalid test, because we never set a parser
error, therefore cp_parser_type_specifier returned error_mark_node
instead of NULL_TREE, and we never issued the "expected type-specifier"
error.

At first I thought I'd just add cp_parser_simulate_error right before
the return, but that regresses crash81.C -- we'd emit multiple errors
for "T::X".  So the next best thing seemed to revert to pre-r11-86
behavior: return early when parser->scope is bad, otherwise proceed to
get the parser error.

gcc/cp/ChangeLog:

PR c++/96137
* parser.c (cp_parser_class_name): If parser->scope is
error_mark_node, return it, otherwise continue.

gcc/testsuite/ChangeLog:

PR c++/96137
* g++.dg/parse/error63.C: New test.

3 years agoDaily bump.
GCC Administrator [Fri, 29 Jan 2021 00:16:21 +0000 (00:16 +0000)]
Daily bump.

3 years agogccgo driver: always act as though -g is passed
Ian Lance Taylor [Thu, 28 Jan 2021 23:46:59 +0000 (15:46 -0800)]
gccgo driver: always act as though -g is passed

The go1 compiler always turns on debugging, to support Go stack traces
and functions like runtime.Callers.  With the recent switch to turn on
DWARF 5 by default, this caused failures with some versions of gas,
such as 2.35.1, because the assembly code would assume DWARF 5 but the
driver would not pass --gdwarf-5 to gas.  gas would then give an
error: "file number less than one".

This change avoids that problem by having the gccgo driver spec add a
-g option to the command line if no other -g option is present.  The
newly added -g option is passed to the assembler as --gdwarf-5.

* gospec.c (lang_specific_driver): Add -g if no debugging options
were passed.

3 years agoc++: Fix -Weffc++ in templates [PR98841]
Jakub Jelinek [Thu, 28 Jan 2021 23:39:00 +0000 (00:39 +0100)]
c++: Fix -Weffc++ in templates [PR98841]

We emit a bogus warning on the following testcase, suggesting that the
operator should return *this even when it does that already.
The problem is that normally cp_build_indirect_ref_1 ensures that *this
is folded as current_class_ref, but in templates (if return type is
non-dependent, otherwise check_return_expr doesn't check it) it didn't
go through cp_build_indirect_ref_1, but just built another INDIRECT_REF.
Which means it then doesn't compare pointer-equal to current_class_ref.

The following patch fixes it by doing in build_x_indirect_ref for
*this what cp_build_indirect_ref_1 would do.

2021-01-28  Jakub Jelinek  <jakub@redhat.com>

PR c++/98841
* typeck.c (build_x_indirect_ref): For *this, return current_class_ref.

* g++.dg/warn/effc5.C: New test.

3 years agotree: Don't reuse types if TYPE_USER_ALIGN differ [PR94775]
Marek Polacek [Thu, 28 Jan 2021 21:21:50 +0000 (16:21 -0500)]
tree: Don't reuse types if TYPE_USER_ALIGN differ [PR94775]

A year ago I submitted this patch:

~~
Here we trip on the TYPE_USER_ALIGN (t) assert in strip_typedefs: it
gets "const d[0]" with TYPE_USER_ALIGN=0 but the result built by
build_cplus_array_type is "const char[0]" with TYPE_USER_ALIGN=1.

When we strip_typedefs the element of the array "const d", we see it's
a typedef_variant_p, so we look at its DECL_ORIGINAL_TYPE, which is
char, but we need to add the const qualifier, so we call
cp_build_qualified_type -> build_qualified_type
where get_qualified_type checks to see if we already have such a type
by walking the variants list, which in this case is:

  char -> c -> const char -> const char -> d -> const d

Because check_base_type only checks TYPE_ALIGN and not TYPE_USER_ALIGN,
we choose the first const char, which has TYPE_USER_ALIGN set.  If the
element type of an array has TYPE_USER_ALIGN, the array type gets it too.

So we can make check_base_type stricter.  I was afraid that it might make
us reuse types less often, but measuring showed that we build the same
amount of types with and without the patch, while bootstrapping.
~~

However, the patch broke a few tests on STRICT_ALIGNMENT platforms and
had to be reverted.  This is another try.  The original patch is kept
unchanged, but I added the finalize_type_size hunk that ought to fix the
STRICT_ALIGNMENT issues.

The problem is that finalize_type_size can clear TYPE_USER_ALIGN on the
main variant of a type, but doesn't clear it on any of the variants.
Then we end up with types which share the same TYPE_MAIN_VARIANT, but
their TYPE_CANONICAL differs and then the usual "canonical types differ
for identical types" follows.

I've created alignas19.C to exercise this scenario.  What happens is:
- when parsing the class S we create a type S in xref_tag,
- we see alignas(8) so common_handle_aligned_attribute sets T_U_A in S,
- we parse the member function fn and build_memfn_type creates a copy
  of S to add const; this variant has T_U_A set,
- we finish_struct S which calls layout_class_type -> finish_record_type
  -> finalize_size_type where we reset T_U_A in S (but const S keeps it),
- finish_non_static_data_member for arr calls maybe_dummy_object with
  type = S,
- maybe_dummy_object calls same_type_ignoring_top_level_qualifiers_p
  to check if S and TREE_TYPE (current_class_ref), which is const S,
  are the same,
- same_type_ignoring_top_level_qualifiers_p creates cv-unqualified
  versions of the passed types.  Previously we'd use our main variant
  S when stripping "const S" of const, but since the T_U_A flags don't
  match (check_base_type), we create a new variant S'.  Then we crash in
  comptypes because S and S' have the same TYPE_MAIN_VARIANT but
  different TYPE_CANONICALs.

With my patch we'll clear T_U_A for S's variants too, and then instead
of S' we'll just use S.

gcc/ChangeLog:

PR c++/94775
* stor-layout.c (finalize_type_size): If we reset TYPE_USER_ALIGN in
the main variant, maybe reset it in its variants too.
* tree.c (check_base_type): Return true only if TYPE_USER_ALIGN match.
(check_aligned_type): Check if TYPE_USER_ALIGN match.

gcc/testsuite/ChangeLog:

PR c++/94775
* g++.dg/cpp0x/alignas19.C: New test.
* g++.dg/warn/Warray-bounds15.C: New test.

3 years agolibstdc++: Fix copyright dates for simd headers and tests
Jonathan Wakely [Thu, 28 Jan 2021 18:13:03 +0000 (18:13 +0000)]
libstdc++: Fix copyright dates for simd headers and tests

libstdc++-v3/ChangeLog:

* include/experimental/bits/numeric_traits.h: Update copyright
dates.
* include/experimental/bits/simd.h: Likewise.
* include/experimental/bits/simd_builtin.h: Likewise.
* include/experimental/bits/simd_converter.h: Likewise.
* include/experimental/bits/simd_detail.h: Likewise.
* include/experimental/bits/simd_fixed_size.h: Likewise.
* include/experimental/bits/simd_math.h: Likewise.
* include/experimental/bits/simd_neon.h: Likewise.
* include/experimental/bits/simd_ppc.h: Likewise.
* include/experimental/bits/simd_scalar.h: Likewise.
* include/experimental/bits/simd_x86.h: Likewise.
* include/experimental/bits/simd_x86_conversions.h: Likewise.
* include/experimental/simd: Likewise.
* testsuite/experimental/simd/*: Likewise.

3 years agoarm: Adjust cost of vector of constant zero
Christophe Lyon [Thu, 28 Jan 2021 17:55:45 +0000 (17:55 +0000)]
arm: Adjust cost of vector of constant zero

Neon vector comparisons have a dedicated version when comparing with
constant zero: it means its cost is free.

Adjust the cost in arm_rtx_costs_internal accordingly, for Neon only,
since MVE does not support this.

2021-01-28  Christophe Lyon  <christophe.lyon@linaro.org>

gcc/
PR target/98730
* config/arm/arm.c (arm_rtx_costs_internal): Adjust cost of vector
of constant zero for comparisons.

gcc/testsuite/
PR target/98730
* gcc.target/arm/simd/vceqzq_p64.c: Update expected result.

3 years ago testsuite: Fix up a testcase to find the right ISO_Fortran_binding.h.
David Edelsohn [Thu, 28 Jan 2021 17:42:00 +0000 (12:42 -0500)]
testsuite: Fix up a testcase to find the right ISO_Fortran_binding.h.

gcc/testsuite/ChangeLog:

* gfortran.dg/ISO_Fortran_binding_18.c: Include
../../../libgfortran/ISO_Fortran_binding.h rather than
ISO_Fortran_binding.h.

3 years agoMap long double built-ins correctly with IEEE 128-bit long double.
Michael Meissner [Thu, 28 Jan 2021 16:30:46 +0000 (11:30 -0500)]
Map long double built-ins correctly with IEEE 128-bit long double.

The PowerPC has two different 128-bit long double types, one that uses a pair
of doubles to get more mantissa range, and the other using the IEEE 128-bit
754R binary floating point format.  The pair of doubles has been used as the
traditional format, and we are in the process of moving to allow an
implementation to switch to using IEEE 128-bit floating point.  The GLIBC and
LIBSTDC++ libraries have been modified to have functions using the two
different formats in their libraries with different names.

This patch goes through all of the built-in functions that either take long
double arguments or return long double, and changes the name from the
traditional name to the IEEE 128-bit name.  The minimum GLIBC version to
support IEEE 128-bit floating point is 2.32.

The names changed are:

    * <name>l is usually mapped to __<name>ieee128;
    * <extra>printf is mapped to __<extra>printfieee128; (and)
    * <extra>scanf is mapped to __isoc99_<extra>scanfieee128.

A few functions have different mappings:

    * dreml => __remainderieee128;
    * gammal => __lgammaieee128;
    * gammal_r => __lgammaieee128_r;
    * lgammal_r => __lgammaieee128_r;
    * nexttoward => __nexttoward_to_ieee128;
    * nexttowardf => __nexttowardf_to_ieee128;
    * nexttowardl => __nexttowardl_to_ieee128;
    * pow10l => __exp10ieee128;
    * scalbl => __scalbieee128;
    * significandl => __significandieee128; (and)
    * sincosl => __sincosieee128.

gcc/
2021-01-28  Michael Meissner  <meissner@linux.ibm.com>

* config/rs6000/rs6000.c (rs6000_mangle_decl_assembler_name): Add
support for mapping built-in function names for long double
built-in functions if long double is IEEE 128-bit.

gcc/testsuite/
2021-01-28  Michael Meissner  <meissner@linux.ibm.com>

* gcc.target/powerpc/float128-longdouble-math.c: New test.
* gcc.target/powerpc/float128-longdouble-stdio.c: New test.
* gcc.target/powerpc/float128-math.c: Adjust test for new name
being generated.  Add support for running test on power10.  Add
support for running if long double defaults to 64-bits.

3 years agoc++: Fix up handling of register ... asm ("...") vars in templates [PR33661, PR98847]
Jakub Jelinek [Thu, 28 Jan 2021 15:13:11 +0000 (16:13 +0100)]
c++: Fix up handling of register ... asm ("...") vars in templates [PR33661, PR98847]

As the testcase shows, for vars appearing in templates, we don't attach
the asm spec string to the pattern decls, nor pass it back to cp_finish_decl
during instantiation.

The following patch does that.

2021-01-28  Jakub Jelinek  <jakub@redhat.com>

PR c++/33661
PR c++/98847
* decl.c (cp_finish_decl): For register vars with asmspec in templates
call set_user_assembler_name and set DECL_HARD_REGISTER.
* pt.c (tsubst_expr): When instantiating DECL_HARD_REGISTER vars,
pass asmspec_tree to cp_finish_decl.

* g++.target/i386/pr98847.C: New test.

3 years agoaarch64: Use RTL builtins for [su]mlsl_n intrinsics
Jonathan Wright [Wed, 27 Jan 2021 12:23:15 +0000 (12:23 +0000)]
aarch64: Use RTL builtins for [su]mlsl_n intrinsics

Rewrite [su]mlsl_n Neon intrinsics to use RTL builtins rather than
inline assembly code, allowing for better scheduling and
optimization.

gcc/ChangeLog:

2021-01-27  Jonathan Wright  <jonathan.wright@arm.com>

* config/aarch64/aarch64-simd-builtins.def: Add [su]mlsl_n
builtin generator macros.
* config/aarch64/aarch64-simd.md (aarch64_<su>mlsl_n<mode>):
Define.
* config/aarch64/arm_neon.h (vmlsl_n_s16): Use RTL builtin
instead of inline asm.
(vmlsl_n_s32): Likewise.
(vmlsl_n_u16): Likewise.
(vmlsl_n_u32): Likewise.

3 years agoaarch64: Fix gcc.target/aarch64/narrow_high-intrinsics.c testism
Kyrylo Tkachov [Thu, 28 Jan 2021 14:10:29 +0000 (14:10 +0000)]
aarch64: Fix gcc.target/aarch64/narrow_high-intrinsics.c testism

Pushing to fix recently-updated assembly generation

gcc/testsuite/

* gcc.target/aarch64/narrow_high-intrinsics.c: Fix shrn2 scan.

3 years agoaarch64: Use RTL builtins for [su]mlal_n intrinsics
Jonathan Wright [Tue, 26 Jan 2021 23:12:46 +0000 (23:12 +0000)]
aarch64: Use RTL builtins for [su]mlal_n intrinsics

Rewrite [su]mlal_n Neon intrinsics to use RTL builtins rather than
inline assembly code, allowing for better scheduling and
optimization.

gcc/ChangeLog:

2021-01-26  Jonathan Wright  <jonathan.wright@arm.com>

* config/aarch64/aarch64-simd-builtins.def: Add [su]mlal_n
builtin generator macros.
* config/aarch64/aarch64-simd.md (aarch64_<su>mlal_n<mode>):
Define.
* config/aarch64/arm_neon.h (vmlal_n_s16): Use RTL builtin
instead of inline asm.
(vmlal_n_s32): Likewise.
(vmlal_n_u16): Likewise.
(vmlal_n_u32): Likewise.

3 years agoc++: header unit template alias merging [PR 98770]
Nathan Sidwell [Thu, 28 Jan 2021 12:48:33 +0000 (04:48 -0800)]
c++: header unit template alias merging [PR 98770]

Typedefs are streamed by streaming the underlying type, and then
recreating the typedef.  But this breaks checking a duplicate is the
same as the original when it is a template alias -- we end up checking
a template alias (eg __void_t) against the underlying type (void).
And those are not the same template alias.  This stops pretendig that
the underlying type is the typedef for that checking and tells
is_matching_decl 'you have a typedef', so it knows what to do.  (We do
not want to recreate the typedef of the duplicate, because that whole
set of nodes is going to go away.)

PR c++/98770
gcc/cp/
* module.cc (trees_out::decl_value): Swap is_typedef & TYPE_NAME
check order.
(trees_in::decl_value): Do typedef frobbing only when installing
a new typedef, adjust is_matching_decl call.  Swap is_typedef
& TYPE_NAME check.
(trees_in::is_matching_decl): Add is_typedef parm. Adjust variable
names and deal with typedef checking.
gcc/testsuite/
* g++.dg/modules/pr98770_a.C: New.
* g++.dg/modules/pr98770_b.C: New.

3 years agoaarch64: Reimplement vshrn_high_n* intrinsics using builtins
Kyrylo Tkachov [Mon, 25 Jan 2021 09:50:54 +0000 (09:50 +0000)]
aarch64: Reimplement vshrn_high_n* intrinsics using builtins

This patch reimplements the vshrn_high_n* intrinsics that generate the
SHRN2 instruction.
It is a vec_concat of the narrowing shift with the bottom part of the
destination register, so we need a little-endian and a big-endian version and an expander to
pick between them.

gcc/ChangeLog:

* config/aarch64/aarch64-simd-builtins.def (shrn2): Define
builtin.
* config/aarch64/aarch64-simd.md (aarch64_shrn2<mode>_insn_le):
Define.
(aarch64_shrn2<mode>_insn_be): Likewise.
(aarch64_shrn2<mode>): Likewise.
* config/aarch64/arm_neon.h (vshrn_high_n_s16): Reimlplement
using builtins.
(vshrn_high_n_s32): Likewise.
(vshrn_high_n_s64): Likewise.
(vshrn_high_n_u16): Likewise.
(vshrn_high_n_u32): Likewise.
(vshrn_high_n_u64): Likewise.

3 years agoaarch64: Reimplement vshrn_n* intrinsics using builtins
Kyrylo Tkachov [Fri, 22 Jan 2021 14:16:30 +0000 (14:16 +0000)]
aarch64: Reimplement vshrn_n* intrinsics using builtins

This patch reimplements the vshrn_n* intrinsics to use RTL builtins.
These perform a narrowing right shift.

Although the intrinsic generates the half-width mode (e.g. V8HI ->
V8QI), the new pattern generates a full 128-bit mode (V8HI -> V16QI) by representing the
fill-with-zeroes semantics of the SHRN instruction. The narrower (V8QI) result is extracted with a
lowpart subreg.
I found this allows the RTL optimisers to do a better job at optimising
redundant moves away in frequently-occurring SHRN+SRHN2 pairs, like in:
uint8x16_t
foo (uint16x8_t in1, uint16x8_t in2)
{
  uint8x8_t tmp = vshrn_n_u16 (in2, 7);
  uint8x16_t tmp2 = vshrn_high_n_u16 (tmp, in1, 4);
  return tmp2;
}

gcc/ChangeLog:

* config/aarch64/aarch64-simd-builtins.def (shrn): Define
builtin.
* config/aarch64/aarch64-simd.md (aarch64_shrn<mode>_insn_le):
Define.
(aarch64_shrn<mode>_insn_be): Likewise.
(aarch64_shrn<mode>): Likewise.
* config/aarch64/arm_neon.h (vshrn_n_s16): Reimplement using
builtins.
(vshrn_n_s32): Likewise.
(vshrn_n_s64): Likewise.
(vshrn_n_u16): Likewise.
(vshrn_n_u32): Likewise.
(vshrn_n_u64): Likewise.
* config/aarch64/iterators.md (vn_mode): New mode attribute.

3 years agoFix LTO bootstrap on Windows
Eric Botcazou [Thu, 28 Jan 2021 10:31:35 +0000 (11:31 +0100)]
Fix LTO bootstrap on Windows

The latest fix introduced a comparison of executables and this cannot
directly work on Windows because they are timestamped.  Moreover nobody
sets $(exeext) at top level, at least on MinGW, so you get weird behavior
because some tools add the implicit .exe suffix and others do not.

contrib/
PR lto/85574
* compare-lto: Deal with PE-COFF executables specifically.

3 years agoPR fortran/86470 - ICE with OpenMP, class(*) allocatable
Harald Anlauf [Thu, 28 Jan 2021 09:13:46 +0000 (10:13 +0100)]
PR fortran/86470 - ICE with OpenMP, class(*) allocatable

gfc_call_malloc should malloc an area of size 1 if no size given.

gcc/fortran/ChangeLog:

PR fortran/86470
* trans.c (gfc_call_malloc): Allocate area of size 1 if passed
size is NULL (as documented).

gcc/testsuite/ChangeLog:

PR fortran/86470
* gfortran.dg/gomp/pr86470.f90: New test.

3 years agoc++: Some C++20 and C++23 option help fixes
Jakub Jelinek [Thu, 28 Jan 2021 09:00:52 +0000 (10:00 +0100)]
c++: Some C++20 and C++23 option help fixes

I've noticed we still refer to C++20 as draft standard, and there is a pasto
in C++23 description.

2021-01-28  Jakub Jelinek  <jakub@redhat.com>

* c.opt (-std=c++2a, -std=c++20, -std=gnu++2a, -std=gnu++20): Remove
draft from description.
(-std=c++2b): Fix a pasto, 2020 -> 2023.

3 years agortl-optimization/80960 - avoid creating garbage RTL in DSE
Richard Biener [Wed, 27 Jan 2021 14:35:52 +0000 (15:35 +0100)]
rtl-optimization/80960 - avoid creating garbage RTL in DSE

The following avoids repeatedly turning VALUE RTXen into
sth useful and re-applying a constant offset through get_addr
via DSE check_mem_read_rtx.  Instead perform this once for
all stores to be visited in check_mem_read_rtx.  This avoids
allocating 1.6GB of garbage PLUS RTXen on the PR80960
testcase, fixing the memory usage regression from old GCC.

2021-01-27  Richard Biener  <rguenther@suse.de>

PR rtl-optimization/80960
* dse.c (check_mem_read_rtx): Call get_addr on the
offsetted address.

3 years agors6000: Fix vec insert ilp32 ICE and test failures [PR98799]
Xionghu Luo [Thu, 28 Jan 2021 02:24:03 +0000 (20:24 -0600)]
rs6000: Fix vec insert ilp32 ICE and test failures [PR98799]

UNSPEC_SI_FROM_SF is not supported when TARGET_DIRECT_MOVE_64BIT
is false for -m32, don't generate VIEW_CONVERT_EXPR(ARRAY_REF) for
variable vector insert.  Remove rs6000_expand_vector_set_var helper
function, adjust the p8 and p9 definitions position and make them
static.

The previous commit r11-6858 missed check m32, This patch is tested pass
on P7BE{m32,m64}/P8BE{m32,m64}/P8LE/P9LE with
RUNTESTFLAGS="--target_board =unix'{-m32,-m64}'" for BE targets.

gcc/ChangeLog:

2021-01-27  Xionghu Luo  <luoxhu@linux.ibm.com>
    David Edelsohn  <dje.gcc@gmail.com>

PR target/98799
* config/rs6000/rs6000-c.c (altivec_resolve_overloaded_builtin):
Don't generate VIEW_CONVERT_EXPR for fcode ALTIVEC_BUILTIN_VEC_INSERT
when -m32.
* config/rs6000/rs6000-protos.h (rs6000_expand_vector_set_var):
Delete.
* config/rs6000/rs6000.c (rs6000_expand_vector_set): Remove the
wrapper call rs6000_expand_vector_set_var for cleanup.  Call
rs6000_expand_vector_set_var_p9 and rs6000_expand_vector_set_var_p8
directly.
(rs6000_expand_vector_set_var): Delete.
(rs6000_expand_vector_set_var_p9): Make static.
(rs6000_expand_vector_set_var_p8): Make static.

gcc/testsuite/ChangeLog:

2021-01-27  Xionghu Luo  <luoxhu@linux.ibm.com>

PR target/98827
* gcc.target/powerpc/fold-vec-insert-char-p8.c: Adjust ilp32.
* gcc.target/powerpc/fold-vec-insert-char-p9.c: Likewise.
* gcc.target/powerpc/fold-vec-insert-double.c: Likewise.
* gcc.target/powerpc/fold-vec-insert-float-p8.c: Likewise.
* gcc.target/powerpc/fold-vec-insert-float-p9.c: Likewise.
* gcc.target/powerpc/fold-vec-insert-int-p8.c: Likewise.
* gcc.target/powerpc/fold-vec-insert-int-p9.c: Likewise.
* gcc.target/powerpc/fold-vec-insert-longlong.c: Likewise.
* gcc.target/powerpc/fold-vec-insert-short-p8.c: Likewise.
* gcc.target/powerpc/fold-vec-insert-short-p9.c: Likewise.
* gcc.target/powerpc/pr79251.p8.c: Likewise.
* gcc.target/powerpc/pr79251.p9.c: Likewise.
* gcc.target/powerpc/vsx-builtin-7.c: Likewise.
* gcc.target/powerpc/pr79251-run.c: Build and run with vsx
option.

3 years agoRISC-V: Fix -march option parsing when extension exists.
Xing GUO [Thu, 28 Jan 2021 03:22:40 +0000 (11:22 +0800)]
RISC-V: Fix -march option parsing when  extension exists.

This patch fixes -march option parsing when `p` extension exists,
e.g., -march=rv64imafdcp should produce

.attribute arch, "rv64i2p0_m2p0_a2p0_f2p0_d2p0_c2p0_p"

rather than

.attribute arch, "rv64i2p0_m2p0_a2p0_f2p0_d2p0_c_p"

gcc/ChangeLog:

* common/config/riscv/riscv-common.c
(riscv_subset_list::parsing_subset_version): Fix -march option parsing
when `p` extension exists.

gcc/testsuite/ChangeLog:

* gcc.target/riscv/attribute-18.c: New test.

3 years agoDaily bump.
GCC Administrator [Thu, 28 Jan 2021 00:16:56 +0000 (00:16 +0000)]
Daily bump.

3 years agoFix strides for C descriptors with stride > 2.
Harris Snyder [Wed, 27 Jan 2021 21:54:04 +0000 (22:54 +0100)]
Fix strides for C descriptors with stride > 2.

libgfortran/ChangeLog:

* runtime/ISO_Fortran_binding.c (CFI_establish): fixed
strides for rank >2 arrays.

gcc/testsuite/ChangeLog:

* gfortran.dg/ISO_Fortran_binding_18.c: New test.
* gfortran.dg/ISO_Fortran_binding_18.f90: New test.

3 years ago[PR97684] IRA: Recalculate pseudo classes if we added new pseduos since last calculat...
Vladimir N. Makarov [Wed, 27 Jan 2021 19:53:28 +0000 (14:53 -0500)]
[PR97684] IRA: Recalculate pseudo classes if we added new pseduos since last calculation before updating equiv regs

update_equiv_regs can use reg classes of pseudos and they are set up in
register pressure sensitive scheduling and loop invariant motion and in
live range shrinking.  This info can become obsolete if we add new pseudos
since the last set up.  Recalculate it again if the new pseudos were
added.

gcc/ChangeLog:

PR rtl-optimization/97684
* ira.c (ira): Call ira_set_pseudo_classes before
update_equiv_regs when it is necessary.

gcc/testsuite/ChangeLog:

PR rtl-optimization/97684
* gcc.target/i386/pr97684.c: New.

3 years agoc++: Dependent using enum [PR97874]
Jason Merrill [Wed, 27 Jan 2021 05:51:01 +0000 (00:51 -0500)]
c++: Dependent using enum [PR97874]

The handling of dependent scopes and unsuitable scopes in lookup_using_decl
was a bit convoluted; I tweaked it for a while and then eventually
reorganized much of the function to hopefully be clearer.  Along the way I
noticed a couple of ways we were mishandling inherited constructors.

The local binding for a dependent using is the USING_DECL.

Implement instantiation of a dependent USING_DECL at function scope.

gcc/cp/ChangeLog:

PR c++/97874
* name-lookup.c (lookup_using_decl): Clean up handling
of dependency and inherited constructors.
(finish_nonmember_using_decl): Handle DECL_DEPENDENT_P.
* pt.c (tsubst_expr): Handle DECL_DEPENDENT_P.

gcc/testsuite/ChangeLog:

PR c++/97874
* g++.dg/lookup/using4.C: No error in C++20.
* g++.dg/cpp0x/decltype37.C: Adjust message.
* g++.dg/template/crash75.C: Adjust message.
* g++.dg/template/crash76.C: Adjust message.
* g++.dg/cpp0x/inh-ctor36.C: New test.
* g++.dg/cpp1z/inh-ctor39.C: New test.
* g++.dg/cpp2a/using-enum-7.C: New test.

3 years agoaarch64: Fix up *aarch64_bfxilsi_uxtw [PR98853]
Jakub Jelinek [Wed, 27 Jan 2021 19:35:21 +0000 (20:35 +0100)]
aarch64: Fix up *aarch64_bfxilsi_uxtw [PR98853]

The https://gcc.gnu.org/legacy-ml/gcc-patches/2018-07/msg01895.html
patch that introduced this pattern claimed:
Would generate:

combine_balanced_int:
        bfxil   w0, w1, 0, 16
        uxtw    x0, w0
        ret

But with this patch generates:

combine_balanced_int:
        bfxil   w0, w1, 0, 16
        ret
and it is indeed what it should generate, but it doesn't do that,
it emits bfxil  x0, x1, 0, 16
instead which doesn't zero extend from 32 to 64 bits, but preserves
the bits from the destination register.

2021-01-27  Jakub Jelinek  <jakub@redhat.com>

PR target/98853
* config/aarch64/aarch64.md (*aarch64_bfxilsi_uxtw): Use
%w0, %w1 and %2 instead of %0, %1 and %2.

* gcc.c-torture/execute/pr98853-1.c: New test.
* gcc.c-torture/execute/pr98853-2.c: New test.

3 years agoCombine patterns for p10 load-cmpi fusion
Aaron Sawdey [Mon, 28 Sep 2020 16:15:46 +0000 (11:15 -0500)]
Combine patterns for p10 load-cmpi fusion

This patch adds the first batch of patterns to support p10 fusion. These
will allow combine to create a single insn for a pair of instructions
that power10 can fuse and execute. These particular fusion pairs have the
requirement that only cr0 can be used when fusing a load with a compare
immediate of -1/0/1 (if signed) or 0/1 (if unsigned), so we want combine
to put that requirement in, and if it doesn't work out the splitter
can change it back into 2 insns so scheduling can move them apart.

The patterns are generated by a script genfusion.pl and live in new file
fusion.md. This script will be expanded to generate more patterns for
fusion.

This also adds option -mpower10-fusion which defaults on for power10 and
will gate all these fusion patterns. In addition I have added an
undocumented option -mpower10-fusion-ld-cmpi (which may be removed later)
that just controls the load+compare-immediate patterns. I have made
these default on for power10 but they are not disallowed for earlier
processors because it is still valid code. This allows us to test the
correctness of fusion code generation by turning it on explicitly.

gcc/ChangeLog:

* config/rs6000/genfusion.pl: New script to generate
define_insn_and_split patterns so combine can arrange fused
instructions next to each other.
* config/rs6000/fusion.md: New file, generated fused instruction
patterns for combine.
* config/rs6000/predicates.md (const_m1_to_1_operand): New predicate.
(non_update_memory_operand): New predicate.
* config/rs6000/rs6000-cpus.def: Add OPTION_MASK_P10_FUSION and
OPTION_MASK_P10_FUSION_LD_CMPI to ISA_3_1_MASKS_SERVER and
POWERPC_MASKS.
* config/rs6000/rs6000-protos.h (address_is_non_pfx_d_or_x): Add
prototype.
* config/rs6000/rs6000.c (rs6000_option_override_internal):
Automatically set OPTION_MASK_P10_FUSION and
OPTION_MASK_P10_FUSION_LD_CMPI if target is power10.
(rs600_opt_masks): Allow -mpower10-fusion
in function attributes.
(address_is_non_pfx_d_or_x): New function.
* config/rs6000/rs6000.h: Add MASK_P10_FUSION.
* config/rs6000/rs6000.md: Include fusion.md.
* config/rs6000/rs6000.opt: Add -mpower10-fusion
and -mpower10-fusion-ld-cmpi.
* config/rs6000/t-rs6000: Add dependencies involving fusion.md.

3 years agolibstdc++: Regenerate libstdc++ HTML docs
Jonathan Wakely [Wed, 27 Jan 2021 17:52:27 +0000 (17:52 +0000)]
libstdc++: Regenerate libstdc++ HTML docs

libstdc++-v3/ChangeLog:

* doc/xml/manual/status_cxx2017.xml: Replace invalid entity.
* doc/html/*: Regenerate.

3 years agoaarch64: Use RTL builtins for [su]mlal intrinsics
Jonathan Wright [Tue, 26 Jan 2021 22:32:08 +0000 (22:32 +0000)]
aarch64: Use RTL builtins for [su]mlal intrinsics

Rewrite [su]mlal Neon intrinsics to use RTL builtins rather than
inline assembly code, allowing for better scheduling and
optimization.

gcc/ChangeLog:

2021-01-26  Jonathan Wright  <jonathan.wright@arm.com>

* config/aarch64/aarch64-simd-builtins.def: Add [su]mlal
builtin generator macros.
* config/aarch64/aarch64-simd.md (*aarch64_<su>mlal<mode>):
Rename to...
(aarch64_<su>mlal<mode>): This.
* config/aarch64/arm_neon.h (vmlal_s8): Use RTL builtin
instead of inline asm.
(vmlal_s16): Likewise.
(vmlal_s32): Likewise.
(vmlal_u8): Likewise.
(vmlal_u16): Likewise.
(vmlal_u32): Likewise.

3 years agolibstdc++: Use printf to print control characters
Jonathan Wakely [Thu, 21 Jan 2021 13:15:42 +0000 (13:15 +0000)]
libstdc++: Use printf to print control characters

Bash and GNU echo do not interpret backslash escapes by default, so use
printf when printing \n or \t in strings.

libstdc++-v3/ChangeLog:

* testsuite/experimental/simd/generate_makefile.sh: Use printf
instead of echo when printing escape characters.

3 years agolibstdc++: Add simd testsuite
Matthias Kretz [Thu, 21 Jan 2021 11:50:32 +0000 (11:50 +0000)]
libstdc++: Add simd testsuite

Add a new check-simd target to the testsuite. The new target creates a
subdirectory, generates the necessary Makefiles, and spawns submakes to
build and run the tests. Running this testsuite with defaults on my
machine takes half of the time the dejagnu testsuite required to only
determine whether to run tests. Since the simd testsuite integrated in
dejagnu increased the time of the whole libstdc++ testsuite by ~100%
this approach is a compromise for speed while not sacrificing coverage
too much. Since the test driver is invoked individually per test
executable from a Makefile, make's jobserver (-j) trivially parallelizes
testing.

Testing different flags and with simulator (or remote execution) is
possible. E.g. `make check-simd DRIVEROPTS=-q
target_list="unix{-m64,-m32}{-march=sandybridge,-march=skylake-avx512}{,-
ffast-math}"`
runs the testsuite 8 times in different subdirectories, using 8
different combinations of compiler flags, only outputs failing tests
(-q), and prints all summaries at the end. It skips most ABI tags by
default unless --run-expensive is passed to DRIVEROPTS or
GCC_TEST_RUN_EXPENSIVE is not empty.

To use a simulator, the CHECK_SIMD_CONFIG variable needs to point to a
shell script which calls `define_target <name> <flags> <simulator>` and
set target_list as needed. E.g.:
case "$target_triplet" in
x86_64-*)
  target_list="unix{-march=sandybridge,-march=skylake-avx512}
  ;;
powerpc64le-*)
  define_target power8 "-static -mcpu=power8" "/usr/bin/qemu-ppc64le -cpu
power8"
  define_target power9 -mcpu=power9 "$HOME/bin/run_on_gcc135"
  target_list="power8 power9{,-ffast-math}"
  ;;
esac

libstdc++-v3/ChangeLog:

* scripts/check_simd: New file. This script is called from the
the check-simd target. It determines a set of compiler flags and
simulator setups for calling generate_makefile.sh and passes the
information back to the check-simd target, which recurses to the
generated Makefiles.
* scripts/create_testsuite_files: Remove files below simd/tests/
from testsuite_files and place them in testsuite_files_simd.
* testsuite/Makefile.am: Add testsuite_files_simd. Add
check-simd target.
* testsuite/Makefile.in: Regenerate.
* testsuite/experimental/simd/driver.sh: New file. This script
compiles and runs a given simd test, logging its output and
status. It uses the timeout command to implement compile and
test timeouts.
* testsuite/experimental/simd/generate_makefile.sh: New file.
This script generates a Makefile which uses driver.sh to compile
and run the tests and collect the logs into a single log file.
* testsuite/experimental/simd/tests/abs.cc: New file. Tests
abs(simd).
* testsuite/experimental/simd/tests/algorithms.cc: New file.
Tests min/max(simd, simd).
* testsuite/experimental/simd/tests/bits/conversions.h: New
file. Contains functions to support tests involving conversions.
* testsuite/experimental/simd/tests/bits/make_vec.h: New file.
Support functions make_mask and make_vec.
* testsuite/experimental/simd/tests/bits/mathreference.h: New
file. Support functions to supply precomputed math function
reference data.
* testsuite/experimental/simd/tests/bits/metahelpers.h: New
file. Support code for SFINAE testing.
* testsuite/experimental/simd/tests/bits/simd_view.h: New file.
* testsuite/experimental/simd/tests/bits/test_values.h: New
file. Test functions to easily drive a test with simd objects
initialized from a given list of values and a range of random
values.
* testsuite/experimental/simd/tests/bits/ulp.h: New file.
Support code to determine the ULP distance of simd objects.
* testsuite/experimental/simd/tests/bits/verify.h: New file.
Test framework for COMPARE'ing simd objects and instantiating
the test templates with value_type and ABI tag.
* testsuite/experimental/simd/tests/broadcast.cc: New file. Test
simd broadcasts.
* testsuite/experimental/simd/tests/casts.cc: New file. Test
simd casts.
* testsuite/experimental/simd/tests/fpclassify.cc: New file.
Test floating-point classification functions.
* testsuite/experimental/simd/tests/frexp.cc: New file. Test
frexp(simd).
* testsuite/experimental/simd/tests/generator.cc: New file. Test
simd generator constructor.
* testsuite/experimental/simd/tests/hypot3_fma.cc: New file.
Test 3-arg hypot(simd,simd,simd) and fma(simd,simd,sim).
* testsuite/experimental/simd/tests/integer_operators.cc: New
file. Test integer operators.
* testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
New file. Test ldexp(simd), scalbn(simd), scalbln(simd), and
modf(simd).
* testsuite/experimental/simd/tests/loadstore.cc: New file. Test
(converting) simd loads and stores.
* testsuite/experimental/simd/tests/logarithm.cc: New file. Test
log*(simd).
* testsuite/experimental/simd/tests/mask_broadcast.cc: New file.
Test simd_mask broadcasts.
* testsuite/experimental/simd/tests/mask_conversions.cc: New
file. Test simd_mask conversions.
* testsuite/experimental/simd/tests/mask_implicit_cvt.cc: New
file. Test simd_mask implicit conversions.
* testsuite/experimental/simd/tests/mask_loadstore.cc: New file.
Test simd_mask loads and stores.
* testsuite/experimental/simd/tests/mask_operator_cvt.cc: New
file. Test simd_mask operators convert as specified.
* testsuite/experimental/simd/tests/mask_operators.cc: New file.
Test simd_mask compares, subscripts, and negation.
* testsuite/experimental/simd/tests/mask_reductions.cc: New
file. Test simd_mask reductions.
* testsuite/experimental/simd/tests/math_1arg.cc: New file. Test
1-arg math functions on simd.
* testsuite/experimental/simd/tests/math_2arg.cc: New file. Test
2-arg math functions on simd.
* testsuite/experimental/simd/tests/operator_cvt.cc: New file.
Test implicit conversions on simd binary operators behave as
specified.
* testsuite/experimental/simd/tests/operators.cc: New file. Test
simd compares, subscripts, not, unary minus, plus, minus,
multiplies, divides, increment, and decrement.
* testsuite/experimental/simd/tests/reductions.cc: New file.
Test reduce(simd).
* testsuite/experimental/simd/tests/remqo.cc: New file. Test
remqo(simd).
* testsuite/experimental/simd/tests/simd.cc: New file. Basic
sanity checks of simd types.
* testsuite/experimental/simd/tests/sincos.cc: New file. Test
sin(simd) and cos(simd).
* testsuite/experimental/simd/tests/split_concat.cc: New file.
Test split(simd) and concat(simd, simd).
* testsuite/experimental/simd/tests/splits.cc: New file. Test
split(simd_mask).
* testsuite/experimental/simd/tests/trigonometric.cc: New file.
Test remaining trigonometric functions on simd.
* testsuite/experimental/simd/tests/trunc_ceil_floor.cc: New
file. Test trunc(simd), ceil(simd), and floor(simd).
* testsuite/experimental/simd/tests/where.cc: New file. Test
masked operations using where.

3 years agolibstdc++: Add std::experimental::simd from the Parallelism TS 2
Matthias Kretz [Thu, 21 Jan 2021 11:45:15 +0000 (11:45 +0000)]
libstdc++: Add std::experimental::simd from the Parallelism TS 2

Adds <experimental/simd>.

This implements the simd and simd_mask class templates via
[[gnu::vector_size(N)]] data members. It implements overloads for all of
<cmath> for simd. Explicit vectorization of the <cmath> functions is not
finished.

The majority of functions are marked as [[gnu::always_inline]] to enable
quasi-ODR-conforming linking of TUs with different -m flags.
Performance optimization was done for x86_64.  ARM, Aarch64, and POWER
rely on the compiler to recognize reduction, conversion, and shuffle
patterns.

Besides verification using many different machine flages, the code was
also verified with different fast-math flags.

libstdc++-v3/ChangeLog:

* doc/xml/manual/status_cxx2017.xml: Add implementation status
of the Parallelism TS 2. Document implementation-defined types
and behavior.
* include/Makefile.am: Add new headers.
* include/Makefile.in: Regenerate.
* include/experimental/simd: New file. New header for
Parallelism TS 2.
* include/experimental/bits/numeric_traits.h: New file.
Implementation of P1841R1 using internal naming. Addition of
missing IEC559 functionality query.
* include/experimental/bits/simd.h: New file. Definition of the
public simd interfaces and general implementation helpers.
* include/experimental/bits/simd_builtin.h: New file.
Implementation of the _VecBuiltin simd_abi.
* include/experimental/bits/simd_converter.h: New file. Generic
simd conversions.
* include/experimental/bits/simd_detail.h: New file. Internal
macros for the simd implementation.
* include/experimental/bits/simd_fixed_size.h: New file. Simd
fixed_size ABI specific implementations.
* include/experimental/bits/simd_math.h: New file. Math
overloads for simd.
* include/experimental/bits/simd_neon.h: New file. Simd NEON
specific implementations.
* include/experimental/bits/simd_ppc.h: New file. Implement bit
shifts to avoid invalid results for integral types smaller than
int.
* include/experimental/bits/simd_scalar.h: New file. Simd scalar
ABI specific implementations.
* include/experimental/bits/simd_x86.h: New file. Simd x86
specific implementations.
* include/experimental/bits/simd_x86_conversions.h: New file.
x86 specific conversion optimizations. The conversion patterns
work around missing conversion patterns in the compiler and
should be removed as soon as PR85048 is resolved.
* testsuite/experimental/simd/standard_abi_usable.cc: New file.
Test that all (not all fixed_size<N>, though) standard simd and
simd_mask types are usable.
* testsuite/experimental/simd/standard_abi_usable_2.cc: New
file. As above but with -ffast-math.
* testsuite/libstdc++-dg/conformance.exp: Don't build simd tests
from the standard test loop. Instead use
check_vect_support_and_set_flags to build simd tests with the
relevant machine flags.

3 years agotree-optimization/98854 - avoid some PHI BB vectorization
Richard Biener [Wed, 27 Jan 2021 14:20:58 +0000 (15:20 +0100)]
tree-optimization/98854 - avoid some PHI BB vectorization

This avoids cases of PHI node vectorization that just causes us
to insert vector CTORs inside loops for values only required
outside of the loop.

2021-01-27  Richard Biener  <rguenther@suse.de>

PR tree-optimization/98854
* tree-vect-slp.c (vect_build_slp_tree_2): Also build
PHIs from scalars when the number of CTORs matches the
number of children.

* gcc.dg/vect/bb-slp-pr98854.c: New testcase.

3 years agoaarch64: Use RTL builtins for integer mls_n intrinsics
Jonathan Wright [Fri, 15 Jan 2021 15:48:59 +0000 (15:48 +0000)]
aarch64: Use RTL builtins for integer mls_n intrinsics

Rewrite integer mls_n Neon intrinsics to use RTL builtins rather than
inline assembly code, allowing for better scheduling and
optimization.

gcc/ChangeLog:

2021-01-15  Jonathan Wright  <jonathan.wright@arm.com>

* config/aarch64/aarch64-simd-builtins.def: Add mls_n builtin
generator macro.
* config/aarch64/aarch64-simd.md (*aarch64_mls_elt_merge<mode>):
Rename to...
(aarch64_mls_n<mode>): This.
* config/aarch64/arm_neon.h (vmls_n_s16): Use RTL builtin
instead of asm.
(vmls_n_s32): Likewise.
(vmls_n_u16): Likewise.
(vmls_n_u32): Likewise.
(vmlsq_n_s16): Likewise.
(vmlsq_n_s32): Likewise.
(vmlsq_n_u16): Likewise.
(vmlsq_n_u32): Likewise.

3 years agoaarch64: Use RTL builtins for integer mls intrinsics
Jonathan Wright [Mon, 11 Jan 2021 17:52:45 +0000 (17:52 +0000)]
aarch64: Use RTL builtins for integer mls intrinsics

Rewrite integer mls Neon intrinsics to use RTL builtins rather than
inline assembly code, allowing for better scheduling and
optimization.

gcc/Changelog:

2021-01-11  Jonathan Wright  <jonathan.wright@arm.com>

* config/aarch64/aarch64-simd-builtins.def: Add mls builtin
generator macro.
* config/aarch64/arm_neon.h (vmls_s8): Use RTL builtin rather
than asm.
(vmls_s16): Likewise.
(vmls_s32): Likewise.
(vmls_u8): Likewise.
(vmls_u16): Likewise.
(vmls_u32): Likewise.
(vmlsq_s8): Likewise.
(vmlsq_s16): Likewise.
(vmlsq_s32): Likewise.
(vmlsq_u8): Likewise.
(vmlsq_u16): Likewise.
(vmlsq_u32): Likewise.

3 years agolibstdc++: Optimize std::string_view::find [PR 66414]
Jonathan Wakely [Wed, 27 Jan 2021 13:21:52 +0000 (13:21 +0000)]
libstdc++: Optimize std::string_view::find [PR 66414]

This reuses the code from std::string::find, which was improved by
r244225, but string_view was not changed to match.

libstdc++-v3/ChangeLog:

PR libstdc++/66414
* include/bits/string_view.tcc
(basic_string_view::find(const CharT*, size_type, size_type)):
Optimize.

3 years agoaarch64: Use RTL builtins for integer mla_n intrinsics
Jonathan Wright [Fri, 15 Jan 2021 15:10:53 +0000 (15:10 +0000)]
aarch64: Use RTL builtins for integer mla_n intrinsics

Rewrite integer mla_n Neon intrinsics to use RTL builtins rather than
inline assembly code, allowing for better scheduling and
optimization.

gcc/ChangeLog:

2021-01-15  Jonathan Wright  <jonathan.wright@arm.com>

* config/aarch64/aarch64-simd-builtins.def: Add mla_n builtin
generator macro.
* config/aarch64/aarch64-simd.md (*aarch64_mla_elt_merge<mode>):
Rename to...
(aarch64_mla_n<mode>): This.
* config/aarch64/arm_neon.h (vmla_n_s16): Use RTL builtin
instead of asm.
(vmla_n_s32): Likewise.
(vmla_n_u16): Likewise.
(vmla_n_u32): Likewise.
(vmlaq_n_s16): Likewise.
(vmlaq_n_s32): Likewise.
(vmlaq_n_u16): Likewise.
(vmlaq_n_u32): Likewise.