platform/upstream/gcc.git
3 years agoi386: Fix ICEs due to simplify_gen_subreg returning NULL [PR99025]
Jakub Jelinek [Wed, 10 Feb 2021 18:50:11 +0000 (19:50 +0100)]
i386: Fix ICEs due to simplify_gen_subreg returning NULL [PR99025]

In these patterns, we call simplify_gen_subreg on the input operand
to create paradoxical subregs that have 2x, 4x or 8x elements as the input
operand.  That works fine if the input operand is a REG, but when it is a
SUBREG, RTL doesn't allow SUBREG of SUBREG and so relies on simplify_subreg
actually simplifying it.  And e.g. if the input operand is a SUBREG that
changes the element mode (floating vs. non-floating) and then combined with
a paradoxical subreg (i.e. different size) this can easily fail, then
simplify_gen_subreg returns NULL but we still use it in instructions.

Fixed by forcing the operands into REG.

2021-02-10  Jakub Jelinek  <jakub@redhat.com>

PR target/99025
* config/i386/sse.md (fix<fixunssuffix>_truncv2sfv2di2,
<insn>v8qiv8hi2, <insn>v8qiv8si2, <insn>v4qiv4si2, <insn>v4hiv4si2,
<insn>v8qiv8di2, <insn>v4qiv4di2, <insn>v2qiv2di2, <insn>v4hiv4di2,
<insn>v2hiv2di2, <insn>v2siv2di2): Force operands[1] into REG before
calling simplify_gen_subreg on it.

* gcc.target/i386/pr99025.c: New test.

3 years agoc++: Consider addresses of heap artificial vars always non-NULL [PR98988, PR99031]
Jakub Jelinek [Wed, 10 Feb 2021 18:31:15 +0000 (19:31 +0100)]
c++: Consider addresses of heap artificial vars always non-NULL [PR98988, PR99031]

With -fno-delete-null-pointer-checks which is e.g. implied by
-fsanitize=undefined or default on some embedded targets, the middle-end
folder doesn't consider addresses of global VAR_DECLs to be non-NULL, as one
of them could have address 0.  Still, I think malloc/operator new (at least
the nonthrowing) relies on NULL returns meaning allocation failure rather
than success.  Furthermore, the artificial VAR_DECLs we create for
constexpr new never actually live in the address space of the program,
so we can pretend they will never be NULL too.

> I'm surprised that nonzero_address has such a limited set of things it will
> actually believe have non-zero addresses with
> -fno-delete-null-pointer-checks.  But it seems that we should be able to
> arrange to satisfy
>
> >   if (definition && !DECL_EXTERNAL (decl)
>
> since these "variables" are indeed defined within the current translation
> unit.

Doing that seems to work and as added benefit it fixes another PR that has
been filed recently.  I need to create the varpool node explicitly and call
a method that sets the definition member in there, but I can also unregister
those varpool nodes at the end of constexpr processing, as the processing
ensured they don't leak outside of the processing.

2021-02-10  Jakub Jelinek  <jakub@redhat.com>

PR c++/98988
PR c++/99031
* constexpr.c: Include cgraph.h.
(cxx_eval_call_expression): Call varpool_node::finalize_decl on
heap artificial vars.
(cxx_eval_outermost_constant_expr): Remove varpool nodes for
heap artificial vars.

* g++.dg/cpp2a/constexpr-new16.C: New test.
* g++.dg/cpp2a/constexpr-new17.C: New test.

3 years agonvptx: properly use flag_patchable_function_entry
Martin Liska [Wed, 10 Feb 2021 13:15:41 +0000 (14:15 +0100)]
nvptx: properly use flag_patchable_function_entry

gcc/ChangeLog:

* config/nvptx/nvptx.c (nvptx_option_override): Use
flag_patchable_function_entry instead of the removed
function_entry_patch_area_size.

3 years agolibstdc++: Re-enable workaround for _wstat64 bug [PR 88881]
Jonathan Wakely [Wed, 10 Feb 2021 16:51:34 +0000 (16:51 +0000)]
libstdc++: Re-enable workaround for _wstat64 bug [PR 88881]

This wasn't fixed upstream for mingw-w64 so we still need the
workaround.

libstdc++-v3/ChangeLog:

PR libstdc++/88881
* src/c++17/fs_ops.cc (fs::status): Re-enable workaround.

3 years agolibstdc++: Use correct error category for Windows error codes
Jonathan Wakely [Wed, 10 Feb 2021 16:45:38 +0000 (16:45 +0000)]
libstdc++: Use correct error category for Windows error codes

When the result of GetLastError() is stored in a std::error_code it
should use std::system_category(), not std::generic_category() that is
used for POSIX errno values.

libstdc++-v3/ChangeLog:

* src/c++17/fs_ops.cc (fs::create_hard_link, fs::equivalent)
(fs::remove): Use std::system_category() for error codes from
GetLastError().
* src/filesystem/ops.cc (fs::create_hard_link, fs::remove):
Likewise.

3 years agolibstdc++: Fix spelling of __MINGW32__ macros
Jonathan Wakely [Wed, 10 Feb 2021 16:37:39 +0000 (16:37 +0000)]
libstdc++: Fix spelling of __MINGW32__ macros

libstdc++-v3/ChangeLog:

* testsuite/27_io/filesystem/operations/proximate.cc: Fix typo
in __MINGW32__ macro name.
* testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
* testsuite/27_io/filesystem/path/generation/proximate.cc:
Likewise.
* testsuite/27_io/filesystem/path/generation/relative.cc:
Likewise.
* testsuite/util/testsuite_fs.h: Likewise.

3 years agofix memory leak in optimize pragma parsing
Richard Biener [Wed, 10 Feb 2021 10:28:30 +0000 (11:28 +0100)]
fix memory leak in optimize pragma parsing

The optimize pragma/attribute parsing calls decode_cmdline_options_to_array
but doesn't free the array.  The following fixes that.

2021-02-10  Richard Biener  <rguenther@suse.de>

gcc/c-family/
* c-common.c (parse_optimize_options): Free decoded_options.

3 years agoc++: generic lambdas and local-externs from outer scopes [PR 99030]
Nathan Sidwell [Wed, 10 Feb 2021 13:29:39 +0000 (05:29 -0800)]
c++: generic lambdas and local-externs from outer scopes [PR 99030]

Lambdas can refer to local externs from their enclosing scope.  When
the lambda's generic but the containing function is not a temploid,
we'll never have tsubsted the declaring decl so won't have a local
specialization.  But in that case we can just use the decl we
tsubsting directly -- it's not dependent.

PR c++/99030
gcc/cp
* pt.c (tsubst_copy) [VAR_DECL]: For a DECL_LOCAL_DECL_P T is the
answer if there's no local specialization.
gcc/testsuite/
* g++.dg/lookup/pr99030.C: New.

3 years agoif-to-switch: fix memory leak in case merging
Martin Liska [Wed, 10 Feb 2021 08:39:54 +0000 (09:39 +0100)]
if-to-switch: fix memory leak in case merging

gcc/ChangeLog:

PR tree-optimization/99002
PR tree-optimization/99026
* gimple-if-to-switch.cc (if_chain::is_beneficial): Fix memory
leak when adjacent cases are merged.
* tree-switch-conversion.c (switch_decision_tree::analyze_switch_statement): Use
release_clusters.
(make_pass_lower_switch): Remove trailing whitespace.
* tree-switch-conversion.h (release_clusters): New.

3 years agortl-optimization/99054 - fix leak in fixup_partitions
Richard Biener [Wed, 10 Feb 2021 09:17:15 +0000 (10:17 +0100)]
rtl-optimization/99054 - fix leak in fixup_partitions

This fixes a leak of the vector retured by find_partition_fixes
by turning it into an auto_vec.

2021-02-10  Richard Biener  <rguenther@suse.de>

PR rtl-optimization/99054
* cfgrtl.c (rtl-optimization/99054): Return an auto_vec.
(fixup_partitions): Adjust.
(rtl_verify_edges): Likewise.

3 years agoopenmp: Temporarily disable into_ssa when gimplifying OpenMP reduction clauses [PR99007]
Jakub Jelinek [Wed, 10 Feb 2021 09:34:58 +0000 (10:34 +0100)]
openmp: Temporarily disable into_ssa when gimplifying OpenMP reduction clauses [PR99007]

gimplify_scan_omp_clauses was already calling gimplify_expr with false as
last argument to make sure it is not an SSA_NAME, but as the testcases show,
that is not enough, SSA_NAME temporaries created during that gimplification
can be reused too and we can't allow SSA_NAMEs to be used across OpenMP
region boundaries, as we can only firstprivatize decls.

Fixed by temporarily disabling into_ssa.

2021-02-10  Jakub Jelinek  <jakub@redhat.com>

PR middle-end/99007
* gimplify.c (gimplify_scan_omp_clauses): For MEM_REF on reductions,
temporarily disable gimplify_ctxp->into_ssa around gimplify_expr
calls.

* g++.dg/gomp/pr99007.C: New test.
* gcc.dg/gomp/pr99007-1.c: New test.
* gcc.dg/gomp/pr99007-2.c: New test.
* gcc.dg/gomp/pr99007-3.c: New test.

3 years agoipa/99029 - fix memory leak in propagate_malloc
Richard Biener [Wed, 10 Feb 2021 08:13:01 +0000 (09:13 +0100)]
ipa/99029 - fix memory leak in propagate_malloc

This makes sure to release the vec<> of callees.

2021-02-10  Richard Biener  <rguenther@suse.de>

PR ipa/99029
* ipa-pure-const.c (propagate_malloc): Use an auto_vec<>
for callees.

3 years agotree-optimization/99024 - fix leak in loop vect analysis
Richard Biener [Wed, 10 Feb 2021 08:06:26 +0000 (09:06 +0100)]
tree-optimization/99024 - fix leak in loop vect analysis

When we analyzed a loop as epilogue but later in peeling decide
we're not going to use it then in the DTOR we clear the original
loops ->aux which causes us to leak the main loop vinfo.

Fixed by only clearing aux if it is associated with the vinfo
we're destroying.

2021-02-10  Richard Biener  <rguenther@suse.de>

PR tree-optimization/99024
* tree-vect-loop.c (_loop_vec_info::~_loop_vec_info): Only
clear loop->aux if it is associated with the destroyed loop_vinfo.

3 years agoif-to-switch: fix a memory leak
Martin Liska [Tue, 9 Feb 2021 08:50:04 +0000 (09:50 +0100)]
if-to-switch: fix a memory leak

gcc/ChangeLog:

PR tree-optimization/99002
* gimple-if-to-switch.cc (find_conditions): Fix memory leak
in the function.

3 years agoICF: fix memory leak
Martin Liska [Tue, 9 Feb 2021 08:57:04 +0000 (09:57 +0100)]
ICF: fix memory leak

gcc/ChangeLog:

PR ipa/99003
* ipa-icf.c (sem_item::add_reference): Fix memory leak when
a reference exists.

3 years agodwarf2out: Don't prune static data members initialized with constants with -gdwarf...
Jakub Jelinek [Wed, 10 Feb 2021 06:54:30 +0000 (07:54 +0100)]
dwarf2out: Don't prune static data members initialized with constants with -gdwarf-5 [PR98755]

In DWARF4 and earlier, static data members were represented as DW_TAG_member and the
pruning code wouldn't prune those, but in DWARF5 they are represented as DW_TAG_variable
with the class parent and the pruning code prunes those by default unless they are
referenced from a separate definition without the class parent (out of class definition).
C++17 inline vars have the definitions in the class though and even before if the static
data member isn't ODR used, it doesn't need to be defined, so we could just never describe
those static data members in the debug info.

This change stops the pruning of DW_TAG_variable with DW_AT_const_value attribute
with a class parent for -gdwarf-5 and later.

This fixes
-FAIL: g++.dg/debug/dwarf2/constexpr-var-1.C   scan-assembler-times  DW_AT_const_expr 2
-FAIL: libstdc++-prettyprinters/80276.cc whatis p4
-FAIL: libstdc++-prettyprinters/80276.cc whatis p4
-FAIL: libstdc++-prettyprinters/libfundts.cc print as
-FAIL: libstdc++-prettyprinters/libfundts.cc print as
-FAIL: libstdc++-prettyprinters/libfundts.cc print os
-FAIL: libstdc++-prettyprinters/libfundts.cc print os

2021-02-10  Jakub Jelinek  <jakub@redhat.com>

PR debug/98755
* dwarf2out.c (prune_unused_types_walk): Mark DW_TAG_variable DIEs
at class scope for DWARF5+.

3 years agoopenacc: Add XFAILs [PR98979]
Julian Brown [Tue, 9 Feb 2021 20:00:14 +0000 (12:00 -0800)]
openacc: Add XFAILs [PR98979]

This patch adds some XFAILs for PR98979 until the patch to fix them has
been approved. See:

  https://gcc.gnu.org/pipermail/gcc-patches/2021-February/564711.html

gcc/testsuite/
PR fortran/98979
* gfortran.dg/goacc/array-with-dt-2.f90: Add expected errors.
* gfortran.dg/goacc/derived-chartypes-1.f90: Skip ICEing test.
* gfortran.dg/goacc/derived-chartypes-2.f90: Likewise.

libgomp/
PR fortran/98979
* testsuite/libgomp.oacc-fortran/array-stride-dt-1.f90: Add expected
errors.

3 years agoRevert "openacc: Allow strided arrays in update directives"
Julian Brown [Tue, 9 Feb 2021 22:09:00 +0000 (14:09 -0800)]
Revert "openacc: Allow strided arrays in update directives"

This patch reverts the non-testsuite parts of commit
9a4d32f85ccebc0ee4b24e6d9d7a4f11c04d7146 which cause ICEs without the
yet-to-be-approved patch here:

  https://gcc.gnu.org/pipermail/gcc-patches/2021-February/564711.html

gcc/fortran/

PR fortran/98979
* openmp.c (resolve_omp_clauses): Omit OpenACC update in
contiguity check and stride-specified error.

3 years agoDaily bump.
GCC Administrator [Wed, 10 Feb 2021 00:16:39 +0000 (00:16 +0000)]
Daily bump.

3 years agolibstdc++: Add unordered containers heterogeneous lookup
François Dumont [Mon, 30 Nov 2020 19:57:16 +0000 (20:57 +0100)]
libstdc++: Add unordered containers heterogeneous lookup

Add unordered containers heterogeneous lookup member functions find, count, contains and
equal_range in C++20. Those members are considered for overload resolution only if hash and
equal functors used to instantiate the container have a nested is_transparent type.

libstdc++-v3/ChangeLog:

* include/bits/stl_tree.h
(__has_is_transparent, __has_is_transparent_t): Move...
* include/bits/stl_function.h: ...here.
* include/bits/hashtable_policy.h (_Hash_code_base<>::_M_hash_code_tr): New..
(_Hashtable_base<>::_M_equals_tr): New.
* include/bits/hashtable.h (_Hashtable<>::_M_find_tr, _Hashtable<>::_M_count_tr,
_Hashtable<>::_M_equal_range_tr): New member function templates to perform
heterogeneous lookup.
(_Hashtable<>::_M_find_before_node_tr): New.
(_Hashtable<>::_M_find_node_tr): New.
* include/bits/unordered_map.h (unordered_map::find<>, unordered_map::count<>,
unordered_map::contains<>, unordered_map::equal_range<>): New member function
templates to perform heterogeneous lookup.
(unordered_multimap::find<>, unordered_multimap::count<>,
unordered_multimap::contains<>, unordered_multimap::equal_range<>): Likewise.
* include/bits/unordered_set.h  (unordered_set::find<>, unordered_set::count<>,
unordered_set::contains<>, unordered_set::equal_range<>): Likewise.
(unordered_multiset::find<>, unordered_multiset::count<>,
unordered_multiset::contains<>, unordered_multiset::equal_range<>): Likewise.
* include/debug/unordered_map
(unordered_map::find<>, unordered_map::equal_range<>): Likewise.
(unordered_multimap::find<>, unordered_multimap::equal_range<>): Likewise.
* include/debug/unordered_set
(unordered_set::find<>, unordered_set::equal_range<>): Likewise.
(unordered_multiset::find<>, unordered_multiset::equal_range<>): Likewise.
* testsuite/23_containers/unordered_map/operations/1.cc: New test.
* testsuite/23_containers/unordered_multimap/operations/1.cc: New test.
* testsuite/23_containers/unordered_multiset/operations/1.cc: New test.
* testsuite/23_containers/unordered_set/operations/1.cc: New test.

3 years agolibstdc++: Remove execution branch in deque iterator operator-
François Dumont [Thu, 4 Feb 2021 05:45:18 +0000 (06:45 +0100)]
libstdc++: Remove execution branch in deque iterator operator-

libstdc++-v3/ChangeLog:

* include/bits/stl_deque.h
(std::operator-(deque::iterator, deque::iterator)): Replace if/then with
a null pointer test.

3 years agoanalyzer: support "_IO_"-prefixed variants of FILE * fns [PR98575]
David Malcolm [Tue, 9 Feb 2021 20:54:14 +0000 (15:54 -0500)]
analyzer: support "_IO_"-prefixed variants of FILE * fns [PR98575]

PR analyzer/98575 describes an unexpected -Wanalyzer-malloc-leak false
positive from gcc.dg/analyzer/pr94851-1.c on glibc < 2.28.

The issue is that a getchar call gets inlined into a call to _IO_getc,
and "_IO_getc" is not in the set of FILE * functions the analyzer
"knows about".  This exposes a bug in memory leak detection on code
paths in which an unknown function has been called.

The memory leak bug is fixed in the prior commit, but for good
measure this patch special-cases the "_IO_"-prefixed names in glibc
so that the analyzer can reuse its knowledge about the unprefixed
variants.

gcc/analyzer/ChangeLog:
PR analyzer/98575
* sm-file.cc (is_file_using_fn_p): Support "_IO_"-prefixed
variants.

gcc/testsuite/ChangeLog:
PR analyzer/98575
* gcc.dg/analyzer/file-1.c (test_5): New.
* gcc.dg/analyzer/file-3.c: New test.

3 years agoanalyzer: treat pointers written to *UNKNOWN as escaping [PR98575]
David Malcolm [Tue, 9 Feb 2021 20:53:01 +0000 (15:53 -0500)]
analyzer: treat pointers written to *UNKNOWN as escaping [PR98575]

PR analyzer/98575 describes an unexpected -Wanalyzer-malloc-leak false
positive from gcc.dg/analyzer/pr94851-1.c on glibc < 2.28.

The issue is that a getchar call gets inlined into a call to _IO_getc,
and "_IO_getc" is not in the set of FILE * functions the analyzer
"knows about".  This leads to a global pointer
  struct buf *curbp;
being treated as UNKNOWN after the call to _IO_getc.  Later when a
malloced pointer is written to curbp->b_amark, the write is discarded
(since curbp is unknown) without noting that the pointer has escaped,
and so the pointer is erroneously treated as leaking when the function
returns.

This patch updates the handling of *UNKNOWN to treat pointers written
to them as having escaped, fixing the false positive.

The patch stops the leak warning in gcc.dg/analyzer/explode-1.c.
After merging states at the join-point after the first switch, pp has
UNKNOWN value, and so *pp is a write through UNKNOWN, which with this
patch is now treated as escaping - despite the fact that all possible
values for *pp are on the stack.  There doesn't seem to be a good way
to fix this, and the testcase is an artifically constructed one, so the
patch simply removes the dg-warning directive.

gcc/analyzer/ChangeLog:
PR analyzer/98575
* store.cc (store::set_value): Treat a pointer written to *UNKNOWN
as having escaped.

gcc/testsuite/ChangeLog:
PR analyzer/98575
* gcc.dg/analyzer/explode-1.c: Remove expected leak warning.
* gcc.dg/analyzer/pr94851-2.c: New test.
* gcc.dg/analyzer/pr98575-1.c: New test.

3 years agoFix miscompilation of Python on HP-PA/Linux
Eric Botcazou [Tue, 9 Feb 2021 18:49:18 +0000 (19:49 +0100)]
Fix miscompilation of Python on HP-PA/Linux

This is the miscompilation of Python at -O2 on HP-PA/Linux present
on the mainline and 10 branch, caused by the presence of a call to
__builtin_unreachable () in the middle of a heavily branchy code,
which confuses the reorg pass.

gcc/
PR rtl-optimization/96015
* reorg.c (skip_consecutive_labels): Minor comment tweaks.
(relax_delay_slots): When deleting a jump to the next active
instruction over a barrier, first delete the barrier if the
jump is the only way to reach the target label.

3 years agoaarch64: fix vector multiplication costs
Andre Vieira [Tue, 9 Feb 2021 18:09:19 +0000 (18:09 +0000)]
aarch64: fix vector multiplication costs

This patch introduces a vect.mul RTX cost and decouples the vector
multiplication costing from the scalar one.

gcc/ChangeLog:
2021-02-09  Andre Vieira  <andre.simoesdiasvieira@arm.com>

* config/aarch64/aarch64-cost-tables.h: Add entries for vect.mul.
* config/aarch64/aarch64.c (aarch64_rtx_mult_cost): Use vect.mul for
vector multiplies and vect.alu for SSRA.
* config/arm/aarch-common-protos.h (struct vector_cost_table): Define
vect.mul cost field.
* config/arm/aarch-cost-tables.h: Add entries for vect.mul.
* config/arm/arm.c: Likewise.

gcc/testsuite/ChangeLog:
2021-02-09  Andre Vieira  <andre.simoesdiasvieira@arm.com>

* gcc.target/aarch64/asimd-mul-to-shl-sub.c: New test.

3 years agotestsuite: aarch64: Add tests for vpaddq intrinsics
Jonathan Wright [Tue, 9 Feb 2021 15:35:16 +0000 (15:35 +0000)]
testsuite: aarch64: Add tests for vpaddq intrinsics

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

gcc/testsuite/ChangeLog:

2021-02-09  Jonathan Wright  <jonathan.wright@arm.com>

* gcc.target/aarch64/advsimd-intrinsics/vpXXXq.inc:
New test template.
* gcc.target/aarch64/advsimd-intrinsics/vpaddq.c: New test.

3 years agolibstdc++: Clear up directories created by tests
Jonathan Wakely [Tue, 9 Feb 2021 16:53:56 +0000 (16:53 +0000)]
libstdc++: Clear up directories created by tests

libstdc++-v3/ChangeLog:

* testsuite/27_io/filesystem/operations/remove_all.cc: Remove
test directory after making it writable again.
* testsuite/experimental/filesystem/operations/remove_all.cc:
Likewise.

3 years agoc++: Fix indirect partitions [PR 98944]
Nathan Sidwell [Tue, 9 Feb 2021 16:11:58 +0000 (08:11 -0800)]
c++: Fix indirect partitions [PR 98944]

The most recent reimplementation of module loading initialization
changed the behaviour of setting an import's location, and broke some
partition handling.

PR c++/98944
gcc/cp/
* module.cc (module_state::is_rooted): Rename to ...
(module_state::has_location): ... here.  Adjust callers.
(module_state::read_partitions): Adjust validity check.
Don't overwrite a known location.
gcc/testsuite/
* g++.dg/modules/pr98944_a.C: New.
* g++.dg/modules/pr98944_b.C: New.
* g++.dg/modules/pr98944_c.C: New.
* g++.dg/modules/pr98944_d.C: New.

3 years agolibstdc++: Make coroutine_handle<_Promise>::from_address() noexcept [PR 99021]
Jonathan Wakely [Tue, 9 Feb 2021 11:23:29 +0000 (11:23 +0000)]
libstdc++: Make coroutine_handle<_Promise>::from_address() noexcept [PR 99021]

The coroutine_handle<void>::from_address(void*) version is already
noexcept, and they do the same thing. Make them consistent.

libstdc++-v3/ChangeLog:

PR libstdc++/99021
* include/std/coroutine (coroutine_handle<P>::from_address): Add
noexcept.

3 years agolibstdc++: Fix build failure for targets without unistd.h
Vladimir Vishnevsky [Tue, 9 Feb 2021 10:25:38 +0000 (10:25 +0000)]
libstdc++: Fix build failure for targets without unistd.h

The patch fixes build issues occurring if build parameter
"--enable-cstdio=stdio_pure" is specified and no unistd.h is
present in the environment.

libstdc++-v3/ChangeLog:

* include/ext/stdio_sync_filebuf.h: Remove unused <unistd.h>.
* src/c++17/fs_ops.cc (fs::permissions): Qualify mode_t.

3 years agoFix O(region-size) unwind in VN
Richard Biener [Tue, 9 Feb 2021 10:59:06 +0000 (11:59 +0100)]
Fix O(region-size) unwind in VN

This fixes the currently O(region-size) unwinding of avail info
to be O(unwind-size) by tracking a linked-list stack of pushed
avails.  This reduces the compile-time spent in complete unrolling
for WRF.

2021-02-09  Richard Biener  <rguenther@suse.de>

PR tree-optimization/98863
* tree-ssa-sccvn.h (vn_avail::next_undo): Add.
* tree-ssa-sccvn.c (last_pushed_avail): New global.
(rpo_elim::eliminate_push_avail): Chain pushed avails.
(unwind_state::avail_top): Add.
(do_unwind): Rewrite unwinding of avail entries.
(do_rpo_vn): Initialize last_pushed_avail and
avail_top of the undo state.

3 years agostring: Add a workaround for -Wstringop-overread false positives [PR98465]
Jakub Jelinek [Tue, 9 Feb 2021 11:32:43 +0000 (12:32 +0100)]
string: Add a workaround for -Wstringop-overread false positives [PR98465]

In the PR there are several possibilities how to improve _M_disjunct at
least in certain cases so that the compiler can figure out at least in some
cases where __s is provably disjunct from _M_data() ... _M_data() + this->size()
but it is probably GCC 12 material.

The false positive warning is on this particular copy, which is done for
non-disjunct pointers when __len2 > __len1 and the __s >= __p + __len1,
i.e. __s used to point to the characters moved through _S_move a few lines earlier
by __len2 - __len1 characters up to make space.  That is why the
_S_copy source is __s + __len2 - __len1.  Unfortunately, when the compiler
can't prove objects are disjunct, that copying from __s + __len2 - __len1
of __len2 characters can very well mean accessing characters the source
object (if it is not disjunct) provably can't have.

The following patch works around that by making the _S_copy be a __p based
pointer instead of __s based pointer.
__s + __len2 - __len1
and
__p + (__s - __p) + (__len2 - __len1)
have the same value and the latter may seem to be uselessly longer,
but it seems at least currently in GIMPLE we keep it that way and so that is
what the warning code during expansion will see, and only actually
optimize it to __s + __len2 - __len1 during RTL when we lose information
on what is a pointer and what is a mere offset with the same mode.

So, in the end we emit exactly the same assembly, just without the false
positive warning.

2021-02-09  Jakub Jelinek  <jakub@redhat.com>

PR middle-end/98465
* include/bits/basic_string.tcc (basic_string::_M_replace): When __s
points to the characters moved by earlier _S_move, compute the source
address using expression based on the __p pointer rather than __s
pointer.

* g++.dg/warn/Wstringop-overread-1.C: New test.

3 years agocalls: Fix a memory leak in maybe_warn_rdwr_sizes [PR99004]
Jakub Jelinek [Tue, 9 Feb 2021 11:29:32 +0000 (12:29 +0100)]
calls: Fix a memory leak in maybe_warn_rdwr_sizes [PR99004]

The print_generic_expr_to_str function ends with
return xstrdup (...); and therefore expects the caller to free
the argument.

The following patch does that after it has been copied.
Instead of doing const_cast to cast away const char * to char *,
because the code uses s0 and s1 in so few places, I chose just
to change the types of the two variables so that const_cast
is not needed.  After all, it is a heap allocated string that
this function owns and so if it wanted, it could change it too.

2021-02-09  Jakub Jelinek  <jakub@redhat.com>

PR middle-end/99004
* calls.c (maybe_warn_rdwr_sizes): Change s0 and s1 type from
const char * to char * and free those pointers after use.

3 years agotree-optimization/99017 - be more forgiving in BB vect costing
Richard Biener [Tue, 9 Feb 2021 09:11:35 +0000 (10:11 +0100)]
tree-optimization/99017 - be more forgiving in BB vect costing

This works around a SLP graph partitioning or cost collecting issue
by being more forgiving in vect_bb_vectorization_profitable_p.

2021-02-09  Richard Biener  <rguenther@suse.de>

PR tree-optimization/99017
* tree-vect-slp.c (vect_bb_vectorization_profitable_p): Allow
zero vector cost entries.

3 years agoc++: consteval and explicit instantiation [PR96905]
Jason Merrill [Mon, 8 Feb 2021 22:16:14 +0000 (17:16 -0500)]
c++: consteval and explicit instantiation [PR96905]

Normally, an explicit instantiation means we want to write out the
instantiation.  But not for a consteval function.

gcc/cp/ChangeLog:

PR c++/96905
* pt.c (mark_decl_instantiated): Exit early if consteval.

gcc/testsuite/ChangeLog:

PR c++/96905
* g++.dg/cpp2a/consteval-expinst1.C: New test.

3 years agoc++: generic lambda, fn* conv, empty class [PR98326]
Jason Merrill [Mon, 8 Feb 2021 22:04:03 +0000 (17:04 -0500)]
c++: generic lambda, fn* conv, empty class [PR98326]

Here, in the thunk returned from the captureless lambda conversion to
pointer-to-function, we try to pass through invisible reference parameters
by reference, without doing a copy.  The empty class copy optimization was
messing that up.

gcc/cp/ChangeLog:

PR c++/98326
PR c++/20408
* cp-gimplify.c (simple_empty_class_p): Don't touch an invisiref
parm.

gcc/testsuite/ChangeLog:

PR c++/98326
* g++.dg/cpp1y/lambda-generic-empty1.C: New test.

3 years agoc++: constexpr, union, and no_unique_address [PR98994]
Jason Merrill [Mon, 8 Feb 2021 20:56:11 +0000 (15:56 -0500)]
c++: constexpr, union, and no_unique_address [PR98994]

My second patch for 97566 omits nested CONSTRUCTORs for empty fields, but we
do want them for empty union members.

gcc/cp/ChangeLog:

PR c++/98994
PR c++/97566
* constexpr.c (cxx_eval_store_expression): Only skip empty fields in
RECORD_TYPE.

gcc/testsuite/ChangeLog:

PR c++/98994
* g++.dg/cpp2a/no_unique_address12.C: New test.

3 years agoDaily bump.
GCC Administrator [Tue, 9 Feb 2021 00:16:30 +0000 (00:16 +0000)]
Daily bump.

3 years agoc++: cleanup function name [PR 98531]
Nathan Sidwell [Wed, 3 Feb 2021 12:44:41 +0000 (04:44 -0800)]
c++: cleanup function name [PR 98531]

The next piece of 98531 is that in some cases we need to create a
cleanup function to do the work (when the object is an array, or we're
using regular atexit).  We were not pushing that function's decl
anywhere (not giving it a context) so streaming it failed.

This is a partial fix.  You'll notice we're naming these from a per-TU
counter.  I've captured that in PR98893.

gcc/cp/
* decl.c (start_cleanup_fn): Push function into
namespace.
gcc/testsuite/
* g++.dg/modules/pr98531-2.h: New.
* g++.dg/modules/pr98531-2_a.H: New.
* g++.dg/modules/pr98531-2_b.C: New.
* g++.dg/modules/pr98531-3.h: New.
* g++.dg/modules/pr98531-3_a.H: New.
* g++.dg/modules/pr98531-3_b.C: New.

3 years agoc++: cross-module __cxa_atexit use [PR 98531]
Nathan Sidwell [Fri, 22 Jan 2021 16:48:27 +0000 (08:48 -0800)]
c++: cross-module __cxa_atexit use [PR 98531]

The compiler's use of lazily-declared library functions must insert
said functions into a symbol table, so that they can be correctly
merged across TUs at the module-level.  We have too many different
ways of declaring such library functions.  This fixes __cxa_atexit (or
its system-specific variations), pushing (or merging) the decl into
the appropriate namespace.  Because we're pushing a lazy builtin,
check_redeclaration_exception_specification needed a tweak to allow a
such a builtin's eh spec to differ from what the user may have already
declared. (I suspect no all headers declare atexit as noexcept.)

We can't test the -fno-use-cxa-atexit path with modules, as that
requires a followup patch to a closely related piece (which also
affects cxa_atexit targets in other circumstances).

PR c++/98531
gcc/cp/
* cp-tree.h (push_abi_namespace, pop_abi_namespace): Declare.
* decl.c (push_abi_namespace, pop_abi_namespace): Moved
from rtti.c, add default namespace arg.
(check_redeclaration_exception_specification): Allow a lazy
builtin's eh spec to differ from an lready-declared user
declaration.
(declare_global_var): Use push/pop_abi_namespace.
(get_atexit_node): Push the fndecl into a namespace.
* rtti.c (push_abi_namespace, pop_abi_namespace): Moved to
decl.c.
gcc/testsuite/
* g++.dg/modules/pr98531-1.h: New.
* g++.dg/modules/pr98531-1_a.H: New.
* g++.dg/modules/pr98531-1_b.C: New.
* g++.dg/abi/pr98531-1.C: New.
* g++.dg/abi/pr98531-2.C: New.
* g++.dg/abi/pr98531-3.C: New.
* g++.dg/abi/pr98531-4.C: New.

3 years agomklog: automatically fill in generated entries
Mike Frysinger [Sun, 7 Feb 2021 20:17:47 +0000 (15:17 -0500)]
mklog: automatically fill in generated entries

contrib/ChangeLog:

* mklog.py (generated_files): New set.
(generate_changelog): Add entries based on generated_files.

3 years agoc++: Fix typo in CLASSTYPE_TI_TEMPLATE comment.
Marek Polacek [Mon, 8 Feb 2021 16:34:54 +0000 (11:34 -0500)]
c++: Fix typo in CLASSTYPE_TI_TEMPLATE comment.

gcc/cp/ChangeLog:

* cp-tree.h (CLASSTYPE_TI_TEMPLATE): Fix typo.

3 years agomiddle-end/98974 - fixup after STMT_VINFO_VEC_STMTS rework
Andre Vieira [Mon, 8 Feb 2021 16:04:18 +0000 (16:04 +0000)]
middle-end/98974 - fixup after STMT_VINFO_VEC_STMTS rework

This fixes up the nvectors parameter passed to vect_get_loop_mask in
vectorizable_condition after the STMT_VINFO_VEC_STMTS rework.

gcc/ChangeLog:
2021-02-08  Andre Vieira  <andre.simoesdiasvieira@arm.com>

PR middle-end/98974
* tree-vect-stmts.c (vectorizable_condition): Remove shadow vec_num
parameter in vectorizable_condition.

gcc/testsuite/ChangeLog:
2021-02-08  Andre Vieira  <andre.simoesdiasvieira@arm.com>

PR middle-end/98974
* gfortran.dg/pr98974.F90: New test.

3 years agolto/96591 - walk VECTOR_CST elements in walk_tree
Richard Biener [Mon, 8 Feb 2021 08:52:56 +0000 (09:52 +0100)]
lto/96591 - walk VECTOR_CST elements in walk_tree

This implements walking of VECTOR_CST elements in walk_tree, mimicing
the walk of COMPLEX_CST elements.  Without this free-lang-data fails
to see some types in case they are only refered to via tree constants
used only as VECTOR_CST elements.

2021-02-08  Richard Biener  <rguenther@suse.de>

PR lto/96591
* tree.c (walk_tree_1): Walk VECTOR_CST elements.

* g++.dg/lto/pr96591_0.C: New testcase.

3 years agoopts: fix handling of -fpatchable-function-entries option
Martin Liska [Fri, 5 Feb 2021 12:11:44 +0000 (13:11 +0100)]
opts: fix handling of -fpatchable-function-entries option

gcc/ChangeLog:

PR lto/98971
* cfgexpand.c (pass_expand::execute): Parse per-function option
flag_patchable_function_entry and use it.
* common.opt: Remove function_entry_patch_area_size and
function_entry_patch_area_start global variables.
* opts.c (parse_and_check_patch_area): New function.
(common_handle_option): Use it.
* opts.h (parse_and_check_patch_area): New function.
* toplev.c (process_options): Parse and use
function_entry_patch_area_size.

3 years agoCorrect typos in attribute malloc documentation.
Martin Sebor [Mon, 8 Feb 2021 00:21:32 +0000 (17:21 -0700)]
Correct typos in attribute malloc documentation.

gcc/ChangeLog:
* doc/extend.texi (attribute malloc): Correct typos.

3 years agoDaily bump.
GCC Administrator [Mon, 8 Feb 2021 00:16:25 +0000 (00:16 +0000)]
Daily bump.

3 years agoDaily bump.
GCC Administrator [Sun, 7 Feb 2021 00:16:19 +0000 (00:16 +0000)]
Daily bump.

3 years agoDaily bump.
GCC Administrator [Sat, 6 Feb 2021 00:16:39 +0000 (00:16 +0000)]
Daily bump.

3 years agoRegenerate .pot files.
Joseph Myers [Fri, 5 Feb 2021 21:40:13 +0000 (21:40 +0000)]
Regenerate .pot files.

gcc/po/
* gcc.pot: Regenerate.

libcpp/po/
* cpplib.pot: Regenerate.

3 years agod: Remove the expansion of intrinsic and built-in codes from the DEF_D_INTRINSIC...
Iain Buclaw [Fri, 5 Feb 2021 11:47:23 +0000 (12:47 +0100)]
d: Remove the expansion of intrinsic and built-in codes from the DEF_D_INTRINSIC macro

Instead, the full name of these codes are explicitly given in
intrinsics.def, to make it clear what these values map to.

gcc/d/ChangeLog:

* d-tree.h (DEF_D_INTRINSIC): Don't insert INTRINSIC_ into the
intrinsic code name.
* intrinsics.cc (DEF_D_INTRINSIC): Don't insert INTRISIC_ and
BUILT_IN_ into the intrinsic and built-in code names.
* intrinsics.def:  Explicitly use full intrinsic and built-in
codes in all definitions.

3 years agoc++: Fix bogus -Wvolatile warning in C++20 [PR98947]
Marek Polacek [Wed, 3 Feb 2021 22:57:22 +0000 (17:57 -0500)]
c++: Fix bogus -Wvolatile warning in C++20 [PR98947]

Since most of volatile is deprecated in C++20, we are required to warn
for compound assignments to volatile variables and so on.  But here we
have

  volatile int x, y, z;
  (b ? x : y) = 1;

and we shouldn't warn, because simple assignments like x = 24; should
not provoke the warning when they are a discarded-value expression.

We warn here because when ?: is used as an lvalue, we transform it in
cp_build_modify_expr/COND_EXPR from (a ? b : c) = rhs to

  (a ? (b = rhs) : (c = rhs))

and build_conditional_expr then calls mark_lvalue_use for the new
artificial assignments, which then evokes the warning.  The calls
to mark_lvalue_use were added in r160289 to suppress warnings in
Wunused-var-10.c, but looks like they're no longer needed.

To warn on

    (b ? (x = 2) : y) = 1;
    (b ? x : (y = 5)) = 1;

I've tweaked a check in mark_use/MODIFY_EXPR.

I'd argue this is a regression because GCC 9 doesn't warn.

gcc/cp/ChangeLog:

PR c++/98947
* call.c (build_conditional_expr_1): Don't call mark_lvalue_use
on arg2/arg3.
* expr.c (mark_use) <case MODIFY_EXPR>: Don't check read_p when
issuing the -Wvolatile warning.  Only set TREE_THIS_VOLATILE if
a warning was emitted.

gcc/testsuite/ChangeLog:

PR c++/98947
* g++.dg/cpp2a/volatile5.C: New test.

3 years agoc++: Fix ICE with invalid using enum [PR96462]
Marek Polacek [Thu, 4 Feb 2021 17:53:59 +0000 (12:53 -0500)]
c++: Fix ICE with invalid using enum [PR96462]

Here we ICE in finish_nonmember_using_decl -> lookup_using_decl ->
... -> find_namespace_slot because "name" is not an IDENTIFIER_NODE.
It is a BIT_NOT_EXPR because this broken test uses

  using E::~E; // SCOPE::NAME

A using-decl can't refer to a destructor, and lookup_using_decl already
checks that in the class member case.  But in C++17, we do the "enum
scope is the enclosing scope" block, and so scope gets set to ::, and
we go into the NAMESPACE_DECL block.  In C++20 we don't do it, we go
to the ENUMERAL_TYPE block.

I resorted to hoisting the check along with a diagnostic tweak: we
don't want to print "::::~E names destructor".

gcc/cp/ChangeLog:

PR c++/96462
* name-lookup.c (lookup_using_decl): Hoist the destructor check.

gcc/testsuite/ChangeLog:

PR c++/96462
* g++.dg/cpp2a/using-enum-8.C: New test.

3 years agodriver: error for nonexistent linker inputs [PR 98943]
Nathan Sidwell [Thu, 4 Feb 2021 16:16:17 +0000 (08:16 -0800)]
driver: error for nonexistent linker inputs [PR 98943]

We used to check all unknown input files, even when passing them to a
compiler.  But that caused problems.  However, not erroring out on
non-existent would-be-linker inputs confuses configure machinery that
probes the compiler to see if it accepts various inputs.  This
restores the access check for things that are thought to be linker
input files, when we're not linking.  (If we are linking, we presume
the linker will error out on its own accord.)

PR driver/98943
gcc/
* gcc.c (driver::maybe_run_linker): Check for input file
accessibility if not linking.
gcc/testsuite/
* c-c++-common/pr98943.c: New.

3 years agotree-optimization/98855 - redo BB vectorization costing
Richard Biener [Fri, 5 Feb 2021 08:54:00 +0000 (09:54 +0100)]
tree-optimization/98855 - redo BB vectorization costing

The following attempts to account for the fact that BB vectorization
regions now can span multiple loop levels and that an unprofitable
inner loop vectorization shouldn't be offsetted by a profitable
outer loop vectorization to make it overall profitable.

For now I've implemented a heuristic based on the premise that
vectorization should be profitable even if loops may not be entered
or if they iterate any number of times.  Especially the first
assumption then requires that stmts directly belonging to loop A
need to be costed separately from stmts belonging to another loop
which also simplifies the implementation.

On x86 the added testcase has in the outer loop

t.c:38:20: note: Cost model analysis for part in loop 1:
  Vector cost: 56
  Scalar cost: 192

and the inner loop

t.c:38:20: note: Cost model analysis for part in loop 2:
  Vector cost: 132
  Scalar cost: 48

and thus the vectorization is considered not profitable
(note the same would happen in case the 2nd cost were for
a loop outer to the 1st costing).

Future enhancements may consider static knowledge of whether
a loop is always entered which would allow some inefficiency
in the vectorization of its loop header.  Likewise stmts only
reachable from a loop exit can be treated this way.

2021-02-05  Richard Biener  <rguenther@suse.de>

PR tree-optimization/98855
* tree-vectorizer.h (add_stmt_cost): New overload.
* tree-vect-slp.c (li_cost_vec_cmp): New.
(vect_bb_slp_scalar_cost): Cost individual loop regions
separately.  Account for the scalar instance root stmt.

* g++.dg/vect/slp-pr98855.cc: New testcase.

3 years agodebug: fix switch lowering debug info
Tom de Vries [Fri, 5 Feb 2021 09:36:38 +0000 (10:36 +0100)]
debug: fix switch lowering debug info

gcc/ChangeLog:

PR debug/98656
* tree-switch-conversion.c (jump_table_cluster::emit): Add loc
argument.
(bit_test_cluster::emit): Reuse location_t for newly created
gswitch statement.
(switch_decision_tree::try_switch_expansion): Preserve
location_t.
* tree-switch-conversion.h: Change function signatures.

3 years agoi386: Fix up TARGET_QIMODE_MATH for many AMD CPU tunings [PR98957]
Jakub Jelinek [Fri, 5 Feb 2021 09:39:03 +0000 (10:39 +0100)]
i386: Fix up TARGET_QIMODE_MATH for many AMD CPU tunings [PR98957]

As written in the PR, TARGET_QIMODE_MATH was meant to be set for all
tunings and it was the case for GCC <= 7, but as the number of
PROCESSOR_* enumerators grew, some AMD tunings (which are at the end
of the list) over time got enumerators with values >= 32 and
TARGET_QIMODE_MATH became disabled for them, in GCC 8 for 2
tunings, in GCC 9 for 7 tunings, in GCC 10 for 8 tunings, and
on the trunk for 11 tunings.

The following patch fixes it by using uhwis rather than uints
and gives them also symbolic names.

2021-02-05  Jakub Jelinek  <jakub@redhat.com>

PR target/98957
* config/i386/i386-options.c (m_NONE, m_ALL): Define.
* config/i386/x86-tune.def (X86_TUNE_BRANCH_PREDICTION_HINTS,
X86_TUNE_PROMOTE_QI_REGS): Use m_NONE instead of 0U.
(X86_TUNE_QIMODE_MATH): Use m_ALL instead of ~0U.

3 years agoc++: Fix ICE with structured binding initialized to incomplete array [PR97878]
Jakub Jelinek [Fri, 5 Feb 2021 09:22:07 +0000 (10:22 +0100)]
c++: Fix ICE with structured binding initialized to incomplete array [PR97878]

We ICE on the following testcase, for incomplete array a on auto [b] { a }; without
giving any kind of diagnostics, with auto [c] = a; during error-recovery.
The problem is that we get too far through check_initializer and e.g.
store_init_value -> constexpr stuff can't deal with incomplete array types.

As the type of the structured binding artificial variable is always deduced,
I think it is easiest to diagnose this early, even if they have array types
we'll need their deduced type to be complete rather than just its element
type.

2021-02-05  Jakub Jelinek  <jakub@redhat.com>

PR c++/97878
* decl.c (check_array_initializer): For structured bindings, require
the array type to be complete.

* g++.dg/cpp1z/decomp54.C: New test.

3 years agoaarch64: Reimplement vget_high* intrinsics
Kyrylo Tkachov [Fri, 5 Feb 2021 09:17:57 +0000 (09:17 +0000)]
aarch64: Reimplement vget_high* intrinsics

Similar to the vget_low* intrinsics we should just use a proper vec_select rather than
going through V2DI subregs.

gcc/ChangeLog:

* config/aarch64/aarch64-simd-builtins.def (get_high): Define builtin.
* config/aarch64/aarch64-simd.md (aarch64_get_high<mode>): Define.
* config/aarch64/arm_neon.h (__GET_HIGH): Delete.
(vget_high_f16): Reimplement using new builtin.
(vget_high_f32): Likewise.
(vget_high_f64): Likewise.
(vget_high_p8): Likewise.
(vget_high_p16): Likewise.
(vget_high_p64): Likewise.
(vget_high_s8): Likewise.
(vget_high_s16): Likewise.
(vget_high_s32): Likewise.
(vget_high_s64): Likewise.
(vget_high_u8): Likewise.
(vget_high_u16): Likewise.
(vget_high_u32): Likewise.
(vget_high_u64): Likewise.

3 years agoaarch64: Reimplement vget_low* intrinsics
Kyrylo Tkachov [Fri, 5 Feb 2021 08:14:07 +0000 (08:14 +0000)]
aarch64: Reimplement vget_low* intrinsics

We can do better on the vget_low* intrinsics.
Currently they reinterpret their argument into a V2DI vector and extract the low "lane",
reinterpreting that back into the shorter vector.
This is functionally correct and generates a sequence of subregs and a vec_select that, by itself,
gets optimised away eventually.
However it's bad when we want to use the result in a other SIMD operations.
Then the subreg-vec_select-subreg combo blocks many combine patterns.

This patch reimplements them to emit a proper low vec_select from the start.
It generates much cleaner RTL and allows for more aggressive combinations, particularly
with the patterns that Jonathan has been pushing lately.

gcc/ChangeLog:

* config/aarch64/aarch64-simd-builtins.def (get_low): Define builtin.
* config/aarch64/aarch64-simd.md (aarch64_get_low<mode>): Define.
* config/aarch64/arm_neon.h (__GET_LOW): Delete.
(vget_low_f16): Reimplement using new builtin.
(vget_low_f32): Likewise.
(vget_low_f64): Likewise.
(vget_low_p8): Likewise.
(vget_low_p16): Likewise.
(vget_low_p64): Likewise.
(vget_low_s8): Likewise.
(vget_low_s16): Likewise.
(vget_low_s32): Likewise.
(vget_low_s64): Likewise.
(vget_low_u8): Likewise.
(vget_low_u16): Likewise.
(vget_low_u32): Likewise.
(vget_low_u64): Likewise.

3 years agoPR target/98878 - Incorrect multilib list for riscv*-rtems
Kito Cheng [Thu, 28 Jan 2021 10:29:53 +0000 (18:29 +0800)]
PR target/98878 - Incorrect multilib list for riscv*-rtems

 - Multi-lib only check the default argument is appeared in the multilib
   flag list, but we didn't check the case that the flag is required but
   default argument didn't provide.

 - For example riscv*-rtems has a multilib set:

     rv32imafd/ilp32d;@march=rv32imafd@mabi=ilp32d

   And when we set the default argument of arch to rv32imafdc and ABI to
   ilp32d, gcc will check the ilp32d is matched, but it didn't check
   rv32imafd is not provided by default arguments, so it should not
   reuse default library.

 - The side effcet of this patch is csky-elf target will increase the
   number of multilib from 54 to 59, but it's because genmultilib didn't
   know the default argument for multilib, so I think it could be
   improved in future.

gcc/ChangeLog:

* gcc.c (print_multilib_info): Check all required argument is provided
by default arg.

3 years agoFix ICE: Don't generate integer mask comparision for 128/256-bits vector when op_true...
liuhongt [Thu, 7 Jan 2021 02:15:33 +0000 (10:15 +0800)]
Fix ICE: Don't generate integer mask comparision for 128/256-bits vector when op_true/op_false are NULL or constm1_rtx/const0_rtx [PR98537]

avx512vl-pr92686-vpcmp-{1,2,intelasm-1}.c are used to guard code
generation of integer mask comparison, but for vector comparison to
vector dest, integer mask comparison is disliked, so delete these
useless tests.

gcc/ChangeLog:

PR target/98537
* config/i386/i386-expand.c (ix86_expand_sse_cmp): Don't
generate integer mask comparison for 128/256-bits vector when
op_true/op_false is NULL_RTX or CONSTM1_RTX/CONST0_RTX. Also
delete redundant !maskcmp condition.
(ix86_expand_int_vec_cmp): Ditto but no redundant deletion
here.
(ix86_expand_sse_movcc): Delete definition of maskcmp, add the
condition directly to if (maskcmp), add extra check for
cmpmode, it should be MODE_INT.
(ix86_expand_fp_vec_cmp): Pass NULL to ix86_expand_sse_cmp's
parameters op_true/op_false.
(ix86_use_mask_cmp_p): New.

gcc/testsuite/ChangeLog:

PR target/98537
* g++.target/i386/avx512bw-pr98537-1.C: New test.
* g++.target/i386/avx512vl-pr98537-1.C: New test.
* g++.target/i386/avx512vl-pr98537-2.C: New test.
* gcc.target/i386/avx512vl-pr88547-1.c: Adjust testcase,
integer mask comparison should not be generated.
* gcc.target/i386/avx512vl-pr92686-vpcmp-1.c: Remove.
* gcc.target/i386/avx512vl-pr92686-vpcmp-2.c: Ditto.
* gcc.target/i386/avx512vl-pr92686-vpcmp-intelasm-1.c: Ditto.

3 years agoEnable X86_TUNE_AVX256_UNALIGNED_{LOAD,STORE}_OPTIMAL in generic tune.
liuhongt [Thu, 28 Jan 2021 06:07:00 +0000 (14:07 +0800)]
Enable X86_TUNE_AVX256_UNALIGNED_{LOAD,STORE}_OPTIMAL in generic tune.

gcc/ChangeLog:

PR target/98172
* config/i386/x86-tune.def (X86_TUNE_AVX256_UNALIGNED_LOAD_OPTIMAL):
Remove m_GENERIC from ~list.
(X86_TUNE_AVX256_UNALIGNED_STORE_OPTIMAL): Ditto.

3 years agoDaily bump.
GCC Administrator [Fri, 5 Feb 2021 00:16:23 +0000 (00:16 +0000)]
Daily bump.

3 years agoopenacc: Tests for character types in derived-type mappings
Julian Brown [Thu, 4 Feb 2021 18:13:22 +0000 (10:13 -0800)]
openacc: Tests for character types in derived-type mappings

This patch adds some tests for character types that are components of
derived types used in OpenACC data-movement clauses.

gcc/testsuite/
* gfortran.dg/goacc/derived-chartypes-1.f90: New test.
* gfortran.dg/goacc/derived-chartypes-2.f90: Likewise.
* gfortran.dg/goacc/derived-chartypes-3.f90: Likewise.
* gfortran.dg/goacc/derived-chartypes-4.f90: Likewise.

3 years agoopenacc: Allow strided arrays in update directives
Julian Brown [Tue, 2 Feb 2021 11:44:34 +0000 (03:44 -0800)]
openacc: Allow strided arrays in update directives

OpenACC 3.0 ("2.14.4. Update Directive") states:

  Noncontiguous subarrays may appear. It is implementation-specific
  whether noncontiguous regions are updated by using one transfer for
  each contiguous subregion, or whether the non-contiguous data is
  packed, transferred once, and unpacked, or whether one or more larger
  subarrays (no larger than the smallest contiguous region that contains
  the specified subarray) are updated.

This patch relaxes some conditions in the Fortran front-end so that
strided accesses are permitted for update directives.

gcc/fortran/
* openmp.c (resolve_omp_clauses): Omit OpenACC update in
contiguity check and stride-specified error.

gcc/testsuite/
* gfortran.dg/goacc/array-with-dt-2.f90: New test.

libgomp/
* testsuite/libgomp.oacc-fortran/array-stride-dt-1.f90: New test.

3 years agoopenacc: Use class_pointer instead of pointer attribute for class types
Julian Brown [Sat, 30 Jan 2021 01:18:07 +0000 (17:18 -0800)]
openacc: Use class_pointer instead of pointer attribute for class types

Elsewhere in the Fortran front-end, the class_pointer attribute is
used for BT_CLASS entities instead of the pointer attribute. This patch
follows suit for OpenACC. I couldn't actually come up with a test case
where this makes a difference (i.e., where "class_pointer" and "pointer"
have different values at this point in the code), but this may nonetheless
fix a latent bug.

gcc/fortran/
* trans-openmp.c (gfc_trans_omp_clauses): Use class_pointer attribute
for BT_CLASS.

3 years agoopenacc: Dereference BT_CLASS data pointers but not BT_DERIVED pointers
Julian Brown [Fri, 29 Jan 2021 23:37:27 +0000 (15:37 -0800)]
openacc: Dereference BT_CLASS data pointers but not BT_DERIVED pointers

The stanza in gfc_trans_omp_clauses that handles derived type members
that are themselves derived type pointers or class pointers now adds
an explicit dereference only for the latter. The former is already
dereferenced transparently in gfc_conv_component_ref.

gcc/fortran/
* trans-openmp.c (gfc_trans_omp_clauses): Fix dereferencing for
BT_DERIVED members.

gcc/testsuite/
* gfortran.dg/goacc/derived-classtypes-1.f95: New test.

3 years agotestsuite: Fix up pr25376.c on powerpc64-linux and array-quals-1.c on powerpc-linux...
Jakub Jelinek [Thu, 4 Feb 2021 22:42:09 +0000 (23:42 +0100)]
testsuite: Fix up pr25376.c on powerpc64-linux and array-quals-1.c on powerpc-linux [PR98325]

The following patch fixes the pr25376.c testcase on powerpc64-linux
and array-quals-1.c on powerpc-linux.
Previously it failed like:
FAIL: gcc.dg/array-quals-1.c scan-assembler-symbol-section symbol ^_?a1\$ (found a1) has section ^\\\\.(const|rodata|srodata)|\\\\[RO\\\\] (found .sdata)
FAIL: gcc.dg/array-quals-1.c scan-assembler-symbol-section symbol ^_?b1\$ (found b1) has section ^\\\\.(const|rodata|srodata)|\\\\[RO\\\\] (found .sdata)
FAIL: gcc.dg/array-quals-1.c scan-assembler-symbol-section symbol ^_?c1\$ (found c1) has section ^\\\\.(const|rodata|srodata)|\\\\[RO\\\\] (found .sdata)
FAIL: gcc.dg/array-quals-1.c scan-assembler-symbol-section symbol ^_?d1\$ (found d1) has section ^\\\\.(const|rodata|srodata)|\\\\[RO\\\\] (found .sdata)
FAIL: gcc.dg/array-quals-1.c scan-assembler-symbol-section symbol ^_?p\$ (found p) has section ^\\\\.(const|rodata|srodata)|\\\\[RW\\\\] (found .sdata)
FAIL: gcc.dg/array-quals-1.c scan-assembler-symbol-section symbol ^_?p1\$ (found p1) has section ^\\\\.(const|rodata|srodata)|\\\\[RW\\\\] (found .sdata)
FAIL: gcc.dg/array-quals-1.c scan-assembler-symbol-section symbol ^_?q\$ (found q) has section ^\\\\.(const|rodata|srodata)|\\\\[RW\\\\] (found .sdata)
FAIL: gcc.dg/array-quals-1.c scan-assembler-symbol-section symbol ^_?q1\$ (found q1) has section ^\\\\.(const|rodata|srodata)|\\\\[RW\\\\] (found .sdata)
FAIL: gcc.dg/array-quals-1.c scan-assembler-symbol-section symbol ^_?r\$ (found r) has section ^\\\\.(const|rodata|srodata)|\\\\[RW\\\\] (found .sdata)
FAIL: gcc.dg/array-quals-1.c scan-assembler-symbol-section symbol ^_?r1\$ (found r1) has section ^\\\\.(const|rodata|srodata)|\\\\[RW\\\\] (found .sdata)
FAIL: gcc.dg/array-quals-1.c scan-assembler-symbol-section symbol ^_?s\$ (found s) has section ^\\\\.(const|rodata|srodata)|\\\\[RW\\\\] (found .sdata)
FAIL: gcc.dg/array-quals-1.c scan-assembler-symbol-section symbol ^_?s1\$ (found s1) has section ^\\\\.(const|rodata|srodata)|\\\\[RW\\\\] (found .sdata)
FAIL: gcc.dg/array-quals-1.c scan-assembler-symbol-section symbol ^_?t\$ (found t) has section ^\\\\.(const|rodata|srodata)|\\\\[RW\\\\] (found .sdata)
FAIL: gcc.dg/array-quals-1.c scan-assembler-symbol-section symbol ^_?t1\$ (found t1) has section ^\\\\.(const|rodata|srodata)|\\\\[RW\\\\] (found .sdata)
FAIL: gcc.dg/pr25376.c scan-assembler-symbol-section symbol simple\$ (found .L.simple) has section ^\\\\.?my_named_section|simple\\\\[DS\\\\]|^\\\\"\\\\.opd\\\\" (found .opd)
FAIL: gcc.dg/pr25376.c scan-assembler-symbol-section symbol simple\$ (found simple) has section ^\\\\.?my_named_section|simple\\\\[DS\\\\]|^\\\\"\\\\.opd\\\\" (found .opd)

The problem with pr25376.c testcase are the ELFv1 function descriptors,
        .section        my_named_section,"ax",@progbits
        .align 2
        .globl simple
        .section        ".opd","aw"
        .align 3
simple:
        .quad   .L.simple,.TOC.@tocbase,0
        .previous
        .type   simple, @function
.L.simple:

so the simple symbol is found in the .opd section rather than in the
my_named_section the test attempts to verify for that symbol.
This patch deals it with two changes, the last two hunks in scanasm.exp
teach it about the behavior of .previous directive and the first hunk
for powerpc if symbol is in .opd section will try section in which the
.L.symbol label is instead.

The array-quals-1.c test fails because on powerpc-linux the symbols
are emitted into .sdata section rather than one of the expected ones.

2021-02-04  Jakub Jelinek  <jakub@redhat.com>

PR testsuite/98325
* lib/scanasm.exp (dg-scan-symbol-section): For powerpc*-*-* targets if
$section is .opd, look at .L.$symbol_name's section.
(parse_section_section_of_symbols): Handle .previous directive.
* gcc.dg/array-quals-1.c: Allow .sdata section.

3 years agod: Merge upstream dmd 46133f761, druntime 0fd4364c
Iain Buclaw [Thu, 4 Feb 2021 21:34:22 +0000 (22:34 +0100)]
d: Merge upstream dmd 46133f761, druntime 0fd4364c

D front-end changes:

 - Backported built-in function handling from upstream.

 - Added new intrinsic `byteswap(ushort)`.

Druntime changes:

 - Update intrinsic modules core.bitop, core.checkedint, core.simd,
   core.vararg, and core.volatile.

 - Backport platform-specific fixes for runtime modules core.cpuid,
   core.internal.traits, and rt.lifetime.

 - Backport openbsd fixes for core.stdc.stdio.

 - Backport solaris fixes for core.sys.posix.locale, and
   core.thread.osthread (PR98910).

gcc/d/ChangeLog:

* dmd/MERGE: Merge upstream dmd 46133f761.
* d-builtins.cc (d_build_builtins_module): Set builtins as BUILTINgcc.
(maybe_set_builtin_1): Likewise.
* d-frontend.cc (eval_builtin): Adjust condition for early return.
* intrinsics.cc (maybe_set_intrinsic): Set intrinsics as BUILTINgcc.
(maybe_expand_intrinsic): Add case for INTRINSIC_BSWAP16.
* intrinsics.def (INTRINSIC_BT): Update signature.
(INTRINSIC_BT64): Likewise.
(INTRINSIC_BSWAP16): New intrinsic.
(INTRINSIC_VLOAD8): Update module.
(INTRINSIC_VLOAD16): Likewise.
(INTRINSIC_VLOAD32): Likewise.
(INTRINSIC_VLOAD64): Likewise.
(INTRINSIC_VSTORE8): Likewise.
(INTRINSIC_VSTORE16): Likewise.
(INTRINSIC_VSTORE32): Likewise.
(INTRINSIC_VSTORE64): Likewise.
(INTRINSIC_ADDS): Update signature.
(INTRINSIC_ADDSL): Likewise.
(INTRINSIC_ADDU): Likewise.
(INTRINSIC_ADDUL): Likewise.
(INTRINSIC_SUBS): Likewise.
(INTRINSIC_SUBSL): Likewise.
(INTRINSIC_SUBU): Likewise.
(INTRINSIC_SUBUL): Likewise.
(INTRINSIC_MULS): Likewise.
(INTRINSIC_MULSL): Likewise.
(INTRINSIC_MULU): Likewise.
(INTRINSIC_MULUI): Likewise.
(INTRINSIC_MULUL): Likewise.
(INTRINSIC_NEGS): Likewise.
(INTRINSIC_NEGSL): Likewise.

libphobos/ChangeLog:

PR d/98910
* libdruntime/MERGE: Merge upstream druntime 0fd4364c.
* libdruntime/Makefile.am (DRUNTIME_DSOURCES): Add core/volatile.d.
* libdruntime/Makefile.in: Regenerate.
* testsuite/libphobos.allocations/tls_gc_integration.d: Update test.

gcc/testsuite/ChangeLog:

* gdc.dg/intrinsics.d: Update test.

3 years agoPR c/97882 - Segmentation Fault on improper redeclaration of function
Martin Sebor [Thu, 4 Feb 2021 21:50:23 +0000 (14:50 -0700)]
PR c/97882 - Segmentation Fault on improper redeclaration of function

gcc/c/ChangeLog:

PR c/97882
* c-decl.c (locate_old_decl): Add type to diagnostic output.
(diagnose_mismatched_decls): Same.
(start_function): Introduce temporaries for better readability.
* c-typeck.c (comptypes_internal): Only consider complete enum
types in comparisons with integers.

gcc/testsuite/ChangeLog:

PR c/97882
* gcc.dg/decl-8.c: Adjust text of expected diagnostic.
* gcc.dg/label-decl-4.c: Same.
* gcc.dg/mismatch-decl-1.c: Same.
* gcc.dg/old-style-then-proto-1.c: Same.
* gcc.dg/parm-mismatch-1.c: Same.
* gcc.dg/pr35445.c: Same.
* gcc.dg/redecl-11.c: Same.
* gcc.dg/redecl-12.c: Same.
* gcc.dg/redecl-13.c: Same.
* gcc.dg/redecl-15.c: Same.
* gcc.dg/tls/thr-init-1.c: Same.
* objc.dg/id-1.m: Same.
* objc.dg/tls/diag-3.m: Same.
* gcc.dg/pr97882.c: New test.
* gcc.dg/qual-return-7.c: New test.
* gcc.dg/qual-return-8.c: New test.

3 years agoc++: Empty args for variadic concept [PR98717]
Jason Merrill [Thu, 4 Feb 2021 16:46:45 +0000 (11:46 -0500)]
c++: Empty args for variadic concept [PR98717]

Nice when fixing a bug is as easy as removing incorrect checks.

gcc/cp/ChangeLog:

PR c++/98717
* constraint.cc (build_concept_check_arguments): Remove assert.
(build_concept_check): Allow empty args.

gcc/testsuite/ChangeLog:

PR c++/98717
* g++.dg/cpp2a/concepts-variadic3.C: New test.

3 years agodiagnostics: fix excessive range-printing involving macros [PR97932]
David Malcolm [Thu, 4 Feb 2021 20:20:59 +0000 (15:20 -0500)]
diagnostics: fix excessive range-printing involving macros [PR97932]

PR c/97932 describes a bug in which diagnostic_show_locus prints most
of a source file.

The issue is that it prints a range in which the start and end locations
are part of the same macro map, but the start location is for a token in
the definition of the macro, whereas the end location is for a token in
an argument of the macro.

This patch extends compatible_locations_p to require that range-printing
of macro maps requires the location to either be both for the definition
of the macro, or both for the arguments of the macro (not one of each),
fixing the issue.

gcc/ChangeLog:
PR c/97932
* diagnostic-show-locus.c (compatible_locations_p): Require
locations in the same macro map to be either both from the
macro definition, or both from the macro arguments.

gcc/testsuite/ChangeLog:
PR c/97932
* gcc.dg/pr97932.c: New test.

3 years agoCorrect date value of the __cpp_size_t_suffix macro.
emsr [Thu, 4 Feb 2021 16:41:29 +0000 (11:41 -0500)]
Correct date value of the __cpp_size_t_suffix macro.

The value of __cpp_size_t_suffix is 202011 not 202006.

gcc/c-family/ChangeLog:

* c-cppbuiltin.c (c_cpp_builtins): __cpp_size_t_suffix=202011L.

gcc/testsuite/ChangeLog:

* g++.dg/cpp23/feat-cxx2b.C: __cpp_size_t_suffix == 202011.

3 years agoc++, libcpp: Use make_signed_t<size_t> in the 1z diagnostics
Jakub Jelinek [Thu, 4 Feb 2021 17:30:45 +0000 (18:30 +0100)]
c++, libcpp: Use make_signed_t<size_t> in the 1z diagnostics

The following patch uses make_signed_t<size_t> instead of
make_signed<size_t>::type in the diagnostics, because the former is shorter.
It is true that one can't use make_signed<size_t>::type in C++11 code (which
is why I haven't changed it in the testcase which is c++11 effective
target), but the message talks about C++23 and make_signed_t is a C++14 and
later feature, so I think it is fine.

2021-02-04  Jakub Jelinek  <jakub@redhat.com>

* expr.c (cpp_classify_number): Use make_signed_t<size_t> instead of
make_signed<size_t>::type in the diagnostics.

* g++.dg/warn/Wsize_t-literals.C: Expect make_signed_t<size_t> instead
of make_signed<size_t>::type in the diagnostics.

3 years agoc++: fix string literal member initializer bug [PR90926]
Tom Greenslade (thomgree) [Wed, 3 Feb 2021 11:31:53 +0000 (11:31 +0000)]
c++: fix string literal member initializer bug [PR90926]

build_aggr_conv did not correctly handle string literal member initializers.
Extended can_convert_array to handle this case. For the additional check of
compatibility of character types, factored out code from digest_init_r into
a new function.

gcc/cp/ChangeLog:

PR c++/90926
* call.c (can_convert_array): Extend to handle all valid aggregate
initializers of an array; including by string literals, not just by
brace-init-list.
(build_aggr_conv): Call can_convert_array more often, not just in
brace-init-list case.
* typeck2.c (array_string_literal_compatible_p): New function.
(digest_init_r): call array_string_literal_compatible_p
* cp-tree.h: (array_string_literal_compatible_p): Declare.

gcc/testsuite/ChangeLog:

PR c++/90926
* g++.dg/cpp1y/nsdmi-aggr12.C: New test.

3 years agoaarch64: Use RTL builtins for [su]mull_high_lane[q] intrinsics
Jonathan Wright [Wed, 3 Feb 2021 17:01:53 +0000 (17:01 +0000)]
aarch64: Use RTL builtins for [su]mull_high_lane[q] intrinsics

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

gcc/ChangeLog:

2021-02-03  Jonathan Wright  <jonathan.wright@arm.com>

* config/aarch64/aarch64-simd-builtins.def: Add
[su]mull_hi_lane[q] builtin generator macros.
* config/aarch64/aarch64-simd.md
(aarch64_<su>mull_hi_lane<mode>_insn): Define.
(aarch64_<su>mull_hi_lane<mode>): Define.
(aarch64_<su>mull_hi_laneq<mode>_insn): Define.
(aarch64_<su>mull_hi_laneq<mode>): Define.
* config/aarch64/arm_neon.h (vmull_high_lane_s16): Use RTL
builtin instead of inline asm.
(vmull_high_lane_s32): Likewise.
(vmull_high_lane_u16): Likewise.
(vmull_high_lane_u32): Likewise.
(vmull_high_laneq_s16): Likewise.
(vmull_high_laneq_s32): Likewise.
(vmull_high_laneq_u16): Likewise.
(vmull_high_laneq_u32): Liekwise.

3 years agoaarch64: Use RTL builtins for [su]mull_high_n intrinsics
Jonathan Wright [Wed, 3 Feb 2021 14:46:00 +0000 (14:46 +0000)]
aarch64: Use RTL builtins for [su]mull_high_n intrinsics

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

gcc/ChangeLog:

2021-02-03  Jonathan Wright  <jonathan.wright@arm.com>

* config/aarch64/aarch64-simd-builtins.def: Add [su]mull_hi_n
builtin generator macros.
* config/aarch64/aarch64-simd.md
(aarch64_<su>mull_hi_n<mode>_insn): Define.
(aarch64_<su>mull_hi_n<mode>): Define.
* config/aarch64/arm_neon.h (vmull_high_n_s16): Use RTL builtin
instead of inline asm.
(vmull_high_n_s32): Likewise.
(vmull_high_n_u16): Likewise.
(vmull_high_n_u32): Likewise.

3 years agotree-optimization/98855 - fix some vectorizer cost issues
Richard Biener [Thu, 4 Feb 2021 11:08:47 +0000 (12:08 +0100)]
tree-optimization/98855 - fix some vectorizer cost issues

This fixes us not costing vectorized bswap for SLP as well as
avoiding biasing to the vectorized side when costing single-argument
PHIs.  Instead we assume coalescing here and cost them with zero cost
for both the scalar and vectorized code.

This doesn't fix the PR on its own.

2021-02-04  Richard Biener  <rguenther@suse.de>

PR tree-optimization/98855
* tree-vect-loop.c (vectorizable_phi): Do not cost
single-argument PHIs.
* tree-vect-slp.c (vect_bb_slp_scalar_cost): Likewise.
* tree-vect-stmts.c (vectorizable_bswap): Also perform
costing for SLP operation.

3 years agoFortran: OpenMP/OpenACC diagnose substring rejections better
Tobias Burnus [Thu, 4 Feb 2021 11:32:59 +0000 (12:32 +0100)]
Fortran: OpenMP/OpenACC diagnose substring rejections better

gcc/fortran/ChangeLog:

* openmp.c (resolve_omp_clauses): Explicitly diagnose
substrings as not permitted.

gcc/testsuite/ChangeLog:

* gfortran.dg/goacc/substring.f90: New test.
* gfortran.dg/gomp/substring.f90: New test.

3 years agodoc: mention -mprefer-vector-width in target attrs
Martin Liska [Wed, 3 Feb 2021 13:32:04 +0000 (14:32 +0100)]
doc: mention -mprefer-vector-width in target attrs

gcc/ChangeLog:

* doc/extend.texi: Mention -mprefer-vector-width in target
attributes.

gcc/testsuite/ChangeLog:

* gcc.target/i386/prefer-vector-width-attr.c: New test.

3 years agoc++: No aggregate CTAD with explicit dguide [PR98802]
Jason Merrill [Thu, 4 Feb 2021 02:56:59 +0000 (21:56 -0500)]
c++: No aggregate CTAD with explicit dguide [PR98802]

In my implementation of P2082R1 I missed this piece: the aggregate deduction
candidate is not generated if the class has user-written deduction guides.

gcc/cp/ChangeLog:

PR c++/98802
* pt.c (do_class_deduction): No aggregate guide if any_dguides_p.

gcc/testsuite/ChangeLog:

PR c++/98802
* g++.dg/cpp1z/class-deduction78.C: New test.

3 years agoc++: subst failure in attribute argument [PR95192]
Jason Merrill [Mon, 1 Feb 2021 22:24:05 +0000 (17:24 -0500)]
c++: subst failure in attribute argument [PR95192]

Another SFINAE issue: we weren't propagating substitution failure in
attributes back up.  And tsubst_function_decl needs to check substitution
before register_specialization.  I thought about moving the other error
returns up as well, but they aren't SFINAE cases, so they can stay where
they are.

This change caused pr84630.C to stop giving an error; this was because
partial instantiation of the lambda failed silently, and before the change
that meant error_mark_node passed to decl_attributes, which complained about
there being an argument at all.  With the change the partial instantiation
fails, but no error was ever given, because push_template_decl silently
failed if current_template_parms wasn't set.  So let's set c_t_p
appropriately.  lambda-uneval13.C is a valid testcase to exercise this.

gcc/cp/ChangeLog:

PR c++/95192
* pt.c (tsubst_attribute): Handle error.
(apply_late_template_attributes): Return false on error.
(tsubst_function_decl): Check its return value.
(tsubst_decl): Likewise.
(push_template_decl): Assert current_template_parms.
(tsubst_template_decl): Set current_template_parms.

gcc/testsuite/ChangeLog:

PR c++/95192
* g++.dg/cpp0x/pr84630.C: Call b().
* g++.dg/cpp2a/lambda-uneval13.C: New test.
* g++.dg/ext/attr-expr1.C: New test.

3 years agoDaily bump.
GCC Administrator [Thu, 4 Feb 2021 00:16:32 +0000 (00:16 +0000)]
Daily bump.

3 years agolibcpp: Fix up -fdirectives-only preprocessing [PR98882]
Jakub Jelinek [Wed, 3 Feb 2021 22:18:05 +0000 (23:18 +0100)]
libcpp: Fix up -fdirectives-only preprocessing [PR98882]

GCC 11 ICEs on all -fdirectives-only preprocessing when the files don't end
with a newline.

The problem is in the assertion, for empty TUs buffer->cur == buffer->rlimit
and so buffer->rlimit[-1] access triggers UB in the preprocessor, for
non-empty TUs it refers to the last character in the file, which can be
anything.
The preprocessor adds a '\n' character (or '\r', in particular if the
user file ends with '\r' then it adds another '\r' rather than '\n'), but
that is added after the limit, i.e. at buffer->rlimit[0].

Now, if the routine handles occassional bumping of pos to buffer->rlimit + 1,
I think it is just the assert that needs changing, usually we read from *pos
if pos < limit and then e.g. if it is '\r', look at the following character
(which could be one of those '\n' or '\r' at buffer->rlimit[0]).  There is
also the case where for '\\' before the limit we read following character
and if it is '\n', do one thing, if it is '\r' read another character.
But in that case if '\\' was the last char in the TU, the limit char will be
'\n', so we are ok.

2021-02-03  Jakub Jelinek  <jakub@redhat.com>

PR preprocessor/98882
* lex.c (cpp_directive_only_process): Don't assert that rlimit[-1]
is a newline, instead assert that rlimit[0] is either newline or
carriage return.  When seeing '\\' followed by '\r', check limit
before accessing pos[1].

* gcc.dg/cpp/pr98882.c: New test.

3 years agoFix typo in Fortran manual
Jeff Law [Wed, 3 Feb 2021 22:01:19 +0000 (15:01 -0700)]
Fix typo in Fortran manual

gcc/fortran:
* intrinsic.texi (ANINT): Fix typo.

3 years agolibphobos: Merge upstream druntime 9d0c8364, phobos 9d575282e.
Iain Buclaw [Wed, 3 Feb 2021 18:01:32 +0000 (19:01 +0100)]
libphobos: Merge upstream druntime 9d0c8364, phobos 9d575282e.

Druntime changes:

 - Add platform-specific bindings for stdlib.h and sys/syctl.h.

 - Add darwin bindings for mach/dyld.h.

 - Fix solaris bindings for locale.h (PR98910).

 - Remove deprecated bindings from the module headers.

Phobos changes:

 - Backport platform-specific fixes for std.conv, std.datetime,
   std.exception, std.experimental.allocator, std.file, std.math,
   std.parallelism, std.socket, std.stdio, and std.system.

Reviewed-on: https://github.com/dlang/druntime/pull/3363
     https://github.com/dlang/phobos/pull/7784

libphobos/ChangeLog:

PR d/98910
* libdruntime/MERGE: Merge upstream druntime 9d0c8364.
* libdruntime/Makefile.am (DRUNTIME_DSOURCES): Add
  core/internal/attributes.d
(DRUNTIME_DSOURCES_BIONIC): Add core/sys/bionic/stdlib.d.
(DRUNTIME_DSOURCES_DARWIN): Add core/sys/darwin/stdlib.d, and
core/sys/darwin/sys/sysctl.d.
(DRUNTIME_DSOURCES_DRAGONFLYBSD): Add
core/sys/dragonflybsd/stdlib.d, and
core/sys/dragonflybsd/sys/sysctl.d.
(DRUNTIME_DSOURCES_FREEBSD): Add core/sys/freebsd/stdlib.d, and
core/sys/freebsd/sys/sysctl.d.
(DRUNTIME_DSOURCES_NETBSD): Add core/sys/netbsd/stdlib.d, and
core/sys/netbsd/sys/sysctl.d.
(DRUNTIME_DSOURCES_OPENBSD): Add core/sys/openbsd/stdlib.d, and
core/sys/openbsd/sys/sysctl.d.
(DRUNTIME_DSOURCES_SOLARIS): Add core/sys/solaris/stdlib.d.
* libdruntime/Makefile.in: Regenerate.
* src/MERGE: Merge upstream phobos 9d575282e.

3 years agoc++: Mark member functions as const [PR98951]
Marek Polacek [Wed, 3 Feb 2021 16:58:13 +0000 (11:58 -0500)]
c++: Mark member functions as const [PR98951]

These member functions look like they could be marked const, since
they don't modify any (non-mutable) class members.

PR c++/98951
* call.c (struct z_candidate): Mark rewritten and reversed as const.
(struct NonPublicField): Mark operator() as const.
(struct NonTrivialField): Likewise.

3 years agoc++: Fix alias comparison [PR98926]
Jason Merrill [Wed, 3 Feb 2021 05:29:00 +0000 (00:29 -0500)]
c++: Fix alias comparison [PR98926]

The comparison of dependent aliases wasn't working here because
processing_template_decl wasn't set, so dependent_alias_template_spec_p was
always returning false.

gcc/cp/ChangeLog:

PR c++/98926
PR c++/98570
* pt.c (spec_hasher::equal): Set processing_template_decl.
* Make-lang.in (check-g++-strict-gc): Add --param
hash-table-verification-limit=10000.

gcc/testsuite/ChangeLog:

* g++.dg/cpp0x/alias-decl-dr1558.C: Pass --param
hash-table-verification-limit=10000.

3 years agoPR tree-optimization/98937 - pointer_query cache leaks
Martin Sebor [Wed, 3 Feb 2021 17:23:06 +0000 (10:23 -0700)]
PR tree-optimization/98937 - pointer_query cache leaks

gcc/ChangeLog:

PR tree-optimization/98937
* tree-ssa-strlen.c (strlen_dom_walker::~strlen_dom_walker): Define.
Flush pointer_query cache.

3 years agoc++: Implement C++23 P0330 - Literal Suffixes for ptrdiff_t and size_t.
Ed Smith-Rowland [Tue, 2 Feb 2021 21:11:57 +0000 (16:11 -0500)]
c++: Implement C++23 P0330 - Literal Suffixes for ptrdiff_t and size_t.

Integer literal suffixes for signed size ('z') and unsigned size
(some permutation od 'zu') are provided as a language addition.

gcc/c-family/ChangeLog:

* c-cppbuiltin.c (c_cpp_builtins): Define __cpp_size_t_suffix.
* c-lex.c (interpret_integer): Set node type for size literal.

libcpp/ChangeLog:

* expr.c (interpret_int_suffix): Detect 'z' integer suffix.
(cpp_classify_number): Compat warning for use of 'z' suffix.
* include/cpplib.h (struct cpp_options): New flag.
(enum cpp_warning_reason): New flag.
(CPP_N_USERDEF): Comment C++0x -> C++11.
(CPP_N_SIZE_T): New flag for cpp_classify_number.
* init.c (cpp_set_lang): Initialize new flag.

gcc/testsuite/ChangeLog:

* g++.dg/cpp0x/udlit-shadow-neg.C: Test for 'z' and 'zu' shadowing.
* g++.dg/cpp23/feat-cxx2b.C: New test.
* g++.dg/cpp23/size_t-literals.C: New test.
* g++.dg/warn/Wsize_t-literals.C: New test.

3 years agolibgo: install new 1.16 packages
Ian Lance Taylor [Wed, 3 Feb 2021 03:29:12 +0000 (19:29 -0800)]
libgo: install new 1.16 packages

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/289069

3 years agotestsuite: Add test for already fixed PR [PR97804]
Jakub Jelinek [Wed, 3 Feb 2021 16:14:40 +0000 (17:14 +0100)]
testsuite: Add test for already fixed PR [PR97804]

This testcase got fixed with the PR98463
r11-6895-g94ff4c9dd98f39280fba22d1ad0958fb25a5363b fix.

2021-02-03  Jakub Jelinek  <jakub@redhat.com>

PR c++/97804
* g++.dg/cpp2a/no_unique_address11.C: New test.

3 years agolibstdc++: Fix incorrect test for std::error_code comparisons
Jonathan Wakely [Wed, 3 Feb 2021 15:49:36 +0000 (15:49 +0000)]
libstdc++: Fix incorrect test for std::error_code comparisons

The tests for std::error_code comparisons assumed that a default
constructed object uses std::generic_category(). That's true for a
default constructed std::error_condition, but not std::error_code.

Fix the three-way comparisons to correctly depend on the result of
comparing the categories, and add another test for comparing two objects
with the same category and different values.

libstdc++-v3/ChangeLog:

* testsuite/19_diagnostics/error_code/operators/not_equal.cc:
Add comparison with same category and different values.
* testsuite/19_diagnostics/error_code/operators/less.cc:
Likewise. Fix comparison involving different categories.
* testsuite/19_diagnostics/error_code/operators/three_way.cc:
Likewise.
* testsuite/19_diagnostics/error_condition/operators/less.cc:
Add comment.
* testsuite/19_diagnostics/error_condition/operators/three_way.cc:
Likewise.

3 years agolibstdc++: Improve "find_first/last_set" for NEON
yaozhongxiao [Wed, 3 Feb 2021 15:49:30 +0000 (15:49 +0000)]
libstdc++: Improve "find_first/last_set" for NEON

The find_first_set and find_last_set method is not optimal for neon, it
needs to be improved by synthesized with horizontal adds(vaddv) which
will reduce the generated assembly code. In the following cases,
vaddvq_s16 will generate 2 instructions but vpadd_s16 will generate 4
instructions:

 # vaddvq_s16
    vaddvq_s16(__asint);
    //  addv    h0, v1.8h
    //  smov    w1, v0.h[0]
 # vpadd_s16
    vpaddq_s16(vpaddq_s16(vpaddq_s16(__asint, __zero), __zero), __zero)[0]
    // addp v1.8h,v1.8h,v2.8h
    // addp v1.8h,v1.8h,v2.8h
    // addp v1.8h,v1.8h,v2.8h
    // smov    w1, v1.h[0]
 #

libstdc++-v3/ChangeLog:

* include/experimental/bits/simd_neon.h: Replace repeated vpadd
calls with a single vaddv for aarch64.

3 years agolibstdc++: Work around test failures using -mno-tree-vrp
Matthias Kretz [Wed, 3 Feb 2021 15:49:30 +0000 (15:49 +0000)]
libstdc++: Work around test failures using -mno-tree-vrp

This is necessary to avoid failures resulting from PR98834.

libstdc++-v3/ChangeLog:

* testsuite/Makefile.am: Warn about the workaround. Add
-fno-tree-vrp to CXXFLAGS passed to the check_simd script.
Improve initial user feedback from make check-simd.
* testsuite/Makefile.in: Regenerated.

3 years agolibstc++: Implement hmin and hmax
Matthias Kretz [Wed, 3 Feb 2021 15:49:30 +0000 (15:49 +0000)]
libstc++: Implement hmin and hmax

From 9.7.4 in Parallelism TS 2. For some reason I overlooked these two
functions. Implement them via call to _S_reduce.

libstdc++-v3/ChangeLog:

* include/experimental/bits/simd.h: Add __detail::_Minimum and
__detail::_Maximum to use them as _BinaryOperation to _S_reduce.
Add hmin and hmax overloads for simd and const_where_expression.
* include/experimental/bits/simd_scalar.h
(_SimdImplScalar::_S_reduce): Make unused _BinaryOperation
parameter const-ref to allow calling _S_reduce with an rvalue.
* testsuite/experimental/simd/tests/reductions.cc: Add tests for
hmin and hmax. Since the compiler statically determined that all
tests pass, repeat the test after a call to make_value_unknown.

3 years agolibstdc++: Improve test codegen for interpreting assembly
Matthias Kretz [Wed, 3 Feb 2021 15:49:30 +0000 (15:49 +0000)]
libstdc++: Improve test codegen for interpreting assembly

In many failure cases it is helpful to inspect the instructions leading
up to the test failure. After this change the location is easier to find
and the branch after failure is easier to find.

libstdc++-v3/ChangeLog:

* testsuite/experimental/simd/tests/bits/verify.h (verify): Add
instruction pointer data member. Ensure that the `if (m_failed)`
branch is always inlined into the calling code. The body of the
conditional can still be a function call. Move the get_ip call
into the verify ctor to simplify the ctor calls.
(COMPARE): Don't mention the use of all_of for reduction of a
simd_mask. It only distracts from the real issue.

3 years agolibstdc++: Support timeout and timeout-factor options
Matthias Kretz [Wed, 3 Feb 2021 15:49:30 +0000 (15:49 +0000)]
libstdc++: Support timeout and timeout-factor options

libstdc++-v3/ChangeLog:

* testsuite/experimental/simd/driver.sh: Abstract reading test
options into read_src_option function. Read skip, only,
expensive, and xfail via read_src_option. Add timeout and
timeout-factor options and adjust timeout variable accordingly.
* testsuite/experimental/simd/tests/loadstore.cc: Set
timeout-factor 2.

3 years agolibstdc++: Abort test after 1000 lines of output
Matthias Kretz [Wed, 3 Feb 2021 15:49:30 +0000 (15:49 +0000)]
libstdc++: Abort test after 1000 lines of output

Handle overly large output by aborting the log and thus the test. This
is a similar condition to a timeout.

libstdc++-v3/ChangeLog:

* testsuite/experimental/simd/driver.sh: When handling the pipe
to log (and on verbose to stdout) count the lines. If it exceeds
1000 log the issue and exit 125, which is then handled as a
failure.