Andrew Pinski [Thu, 27 Jan 2022 10:28:28 +0000 (10:28 +0000)]
Fix aarch64/104201: branch-protection-attr.c fails after quoting difference
After the quoting changes in r12-6521-g03a1a86b5ee40d4e240, branch-protection-attr.c
fails due to expecting a different quoting type for "leaf".
This patch changes the quoting from "" to '' as that is what is used now.
Committed as obvious after a test of the testcase.
gcc/testsuite/ChangeLog:
PR target/104201
* gcc.target/aarch64/branch-protection-attr.c: Fix quoting for
the expected error message on line 5 of leaf.
Jakub Jelinek [Thu, 27 Jan 2022 09:47:00 +0000 (10:47 +0100)]
reassoc: Fix up inter-bb range optimization [PR104196]
As mentioned in the PR, reassoc1 miscompiles following testcase.
We have:
if (a.1_1 >= 0)
goto <bb 5>; [59.00%]
else
goto <bb 4>; [41.00%]
<bb 4> [local count:
440234144]:
_3 = -
2147483647 - a.1_1;
_9 = a.1_1 != -
2147479551;
_4 = _3 == 1;
_8 = _4 | _9;
if (_8 != 0)
goto <bb 5>; [34.51%]
else
goto <bb 3>; [65.49%]
and the inter-bb range test optimization treats it as:
if ((a.1_1 >= 0)
| (-
2147483647 - a.1_1 == 1)
| (a.1_1 != -
2147479551))
goto bb5;
else
goto bb3;
and recognizes that a.1_1 >= 0 is redundant with a.1_1 != -
2147479551
and so will optimize it into:
if (0
| (-
2147483647 - a.1_1 == 1)
| (a.1_1 != -
2147479551))
goto bb5;
else
goto bb3;
When merging 2 comparisons, we use update_range_test which picks one
of the comparisons as the one holding the result (currently always
the RANGE one rather than all the OTHERRANGE* ones) and adjusts the
others to be true or false.
The problem with doing that is that means the
_3 = -
2147483647 - a.1_1;
stmt with undefined behavior on overflow used to be conditional before
but now is unconditional. reassoc performs a no_side_effect_bb check
which among other checks punts on gimple_has_side_effects and
gimple_assign_rhs_could_trap_p stmts as well as ones that have uses of
their lhs outside of the same bb, but it doesn't punt for this potential
signed overflow case.
Now, for this testcase, it can be fixed in update_range_test by being
smarter and choosing the other comparison to modify. This is achieved
by storing into oe->id index of the bb with GIMPLE_COND the
comparison feeds into not just for the cases where the comparison is
the GIMPLE_COND itself, but in all cases, and then finding oe->id that
isn't dominated by others. If we find such, use that oe for the merge
test and if successful, swap range->idx and swap_with->idx.
So for the above case we optimize it into:
if ((a.1_1 != -
2147479551)
| (-
2147483647 - a.1_1 == 1)
| 0)
goto bb5;
else
goto bb3;
instead.
Unfortunately, this doesn't work in all cases,
optimize_range_tests_to_bit_test and
optimize_range_tests_cmp_bitwise optimizations use non-NULL seq
to update_range_test and they carefully choose a particular comparison
because the sequence then uses SSA_NAMEs that may be defined only in
their blocks. For that case, the patch keeps using the chosen comparison
but if the merge is successful, rewrites stmts with signed overflow behavior
into defined overflow.
For this I ran into a problem, rewrite_to_defined_overflow returns a
sequence that includes the original stmt with modified arguments, this means
it needs to be gsi_remove first. Unfortunately, gsi_remove regardless of
the remove_permanently argument creates debug temps for the lhs, which I
think is quite undesirable here. So I've added an argument (default to
false) to rewrite_to_defined_overflow to do the modification in place
without the need to remove the stmt.
2022-01-27 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/104196
* gimple-fold.h (rewrite_to_defined_overflow): Add IN_PLACE argument.
* gimple-fold.cc (rewrite_to_defined_overflow): Likewise. If true,
return NULL and emit needed stmts before and after stmt.
* tree-ssa-reassoc.cc (update_range_test): For inter-bb range opt
pick as operand_entry that will hold the merged test the one feeding
earliest condition, ensure that by swapping range->idx with some
other range's idx if needed. If seq is non-NULL, don't actually swap
it but instead rewrite stmts with undefined overflow in between
the two locations.
(maybe_optimize_range_tests): Set ops[]->id to bb->index with the
corresponding condition even if they have non-NULL ops[]->op.
Formatting fix.
* gcc.c-torture/execute/pr104196.c: New test.
Tobias Burnus [Thu, 27 Jan 2022 08:39:01 +0000 (09:39 +0100)]
libgomp.texi: Update OpenMP implementation status
libgomp/
* libgomp.texi (OpenMP 5.0): Update implementation status.
GCC Administrator [Thu, 27 Jan 2022 00:16:29 +0000 (00:16 +0000)]
Daily bump.
Jakub Jelinek [Wed, 26 Jan 2022 21:55:11 +0000 (22:55 +0100)]
rs6000: Fix up *intrin.h for C89 [PR104239]
When writing testcases for the previously posted patch, I have noticed
that 3 of the headers aren't valid C89 (I didn't have any dg-options
so -ansi -pedantic-errors was implied and these errors were reported).
The following patch fixes those, ok for trunk?
Note, as can be seen even in this patch, seems older rs6000/*intrin.h
headers uglify not just argument names (__A instead of A etc.), but also
automatic variable names and other local identifiers, while e.g. emmintrin.h
or bmi2intrin.h clearly uglify only the argument names and not local
variables. I think that should be fixed but don't have time for that myself
(libstdc++ or e.g. the x86 headers uglify everything; this is so that one
can
#define result a + b
#include <x86intrin.h>
etc.).
2022-01-26 Jakub Jelinek <jakub@redhat.com>
PR target/104239
* config/rs6000/emmintrin.h (_mm_sad_epu8): Use __asm__ instead of
asm.
* config/rs6000/smmintrin.h (_mm_minpos_epu16): Declare iterator
before for loop instead of for init clause.
* config/rs6000/bmi2intrin.h (_pext_u64): Likewise.
* gcc.target/powerpc/pr104239-3.c: New test.
Jakub Jelinek [Wed, 26 Jan 2022 21:07:29 +0000 (22:07 +0100)]
rs6000: Fix up #include <immintrin.h> or <x86gprintrin.h> [PR104239]
r12-4717-g7d37abedf58d66 added immintrin.h and x86gprintrin.h headers
to rs6000, these headers are on x86 standalone headers that various
programs include directly rather than including them through
<x86intrin.h>.
Unfortunately, for that change the bmiintrin.h and bmi2intrin.h
headers haven't been adjusted, so the effect is that if one includes them
(without including also x86intrin.h first) #error will trigger.
Furthermore, when including such headers conditionally as some real-world
packages do, this means a regression.
The following patch fixes it and matches what the x86 bmi{,2}intrin.h
headers do.
2022-01-26 Jakub Jelinek <jakub@redhat.com>
PR target/104239
* config/rs6000/bmiintrin.h: Test _X86GPRINTRIN_H_INCLUDED instead of
_X86INTRIN_H_INCLUDED and adjust #error wording.
* config/rs6000/bmi2intrin.h: Likewise.
* gcc.target/powerpc/pr104239-1.c: New test.
* gcc.target/powerpc/pr104239-2.c: New test.
Jason Merrill [Wed, 26 Jan 2022 17:44:31 +0000 (12:44 -0500)]
c++: vector compound literal [PR104206]
My patch for PR101072 removed the specific VECTOR_TYPE handling here, which
broke pr72747-2.c on PPC; this patch restores it.
PR c++/104206
PR c++/101072
gcc/cp/ChangeLog:
* semantics.cc (finish_compound_literal): Restore VECTOR_TYPE check.
Jakub Jelinek [Wed, 26 Jan 2022 18:42:31 +0000 (19:42 +0100)]
dwarf2out: For ppc64le IEEE quad long double, emit DW_TAG_typedef to _Float128 [PR104194]
On Mon, Jan 24, 2022 at 11:26:27PM +0100, Jakub Jelinek via Gcc-patches wrote:
> Yet another short term solution might be not use DW_TAG_base_type
> for the IEEE quad long double, but instead pretend it is a DW_TAG_typedef
> with DW_AT_name "long double" to __float128 DW_TAG_base_type.
> I bet gdb would even handle it without any changes, but of course, it would
> be larger than the other proposed changes.
Here it is implemented.
Testcases I've played with are e.g.:
__ibm128 a;
long double b;
_Complex long double c;
static __attribute__((noinline)) int
foo (long double d)
{
long double e = d + 1.0L;
return 0;
}
int
main ()
{
a = 1.0;
b = 2.0;
c = 5.0 + 6.0i;
return foo (7.0L);
}
and
real(kind=16) :: a
complex(kind=16) :: b
a = 1.0
b = 2.0
end
Printing the values of the variables works well,
p &b or p &c shows pointer to the correct type, just
ptype b or ptype c prints _Float128 instead of
long double or complex _Float128 instead of complex long double.
Even worse in fortran where obviously _Float128 or
complex _Float128 aren't valid types, but as GDB knows them by name,
it is just ptype that is weird.
2022-01-26 Jakub Jelinek <jakub@redhat.com>
PR debug/104194
* dwarf2out.cc (long_double_as_float128): New function.
(modified_type_die): For powerpc64le IEEE 754 quad long double
and complex long double emit those as DW_TAG_typedef to
_Float128 or complex _Float128 base type.
Jakub Jelinek [Wed, 26 Jan 2022 18:40:29 +0000 (19:40 +0100)]
c++: Fix up handling of vector CONSTRUCTORs with vectors in it in constexpr.cc [PR104226]
The middle-end uses sometimes VECTOR_TYPE CONSTRUCTORs that contain
some other VECTOR_TYPE elements in it (should be with compatible element
size and smaller number of elements, e.g. a V8SImode vector can be
constructed as { V4SImode_var_1, V4SImode_var_2 }), and expansion of
__builtin_shufflevector emits these early, so constexpr.cc can see those
too.
constexpr.cc already has special cases for NULL index which is typical
for VECTOR_TYPE CONSTRUCTORs, and for VECTOR_TYPE CONSTRUCTORs that
contain just scalar elts that works just fine - init_subob_ctx just
returns on non-aggregate elts and get_or_insert_ctor_field has
if (TREE_CODE (type) == VECTOR_TYPE && index == NULL_TREE)
{
CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (ctor), index, NULL_TREE);
return &CONSTRUCTOR_ELTS (ctor)->last();
}
handling for it. But for the vector in vector case init_subob_ctx would
try to create a sub-CONSTRUCTOR and even didn't handle the NULL index
case well, so instead of creating the sub-CONSTRUCTOR after the elts already
in it overwrote the first one. So
(V8SImode) { { 0, 0, 0, 0 }, { 0, 0, 0, 0 } }
became
(V8SImode) { 0, 0, 0, 0 }
The following patch fixes it by not forcing a sub-CONSTRUCTOR for this
vector in vector case.
2022-01-26 Jakub Jelinek <jakub@redhat.com>
PR c++/104226
* constexpr.cc (init_subob_ctx): For vector ctors containing
vector elements, ensure appending to the same ctor instead of
creating another one.
* g++.dg/cpp0x/constexpr-104226.C: New test.
Marek Polacek [Tue, 25 Jan 2022 20:12:51 +0000 (15:12 -0500)]
warn-access: Prevent -Wuse-after-free on ARM [PR104213]
Here, -Wuse-after-free warns about using 'this' which, on ARM, cdtors
return, as mandated by the EABI. To be entirely correct, it only
requires it for C1 and C2 ctors and D2 and D1 dtors, but I don't feel
like changing that now and possibly running into issues later on.
This patch uses suppress_warning on 'this' for certain cdtor_returns_this
cases in the C++ FE, and then warn_invalid_pointer makes use of this
information and doesn't warn.
In my first attempt I tried suppress_warning the MODIFY_EXPR or RETURN_EXPR
we build in build_delete_destructor_body, but the complication is that
the suppress_warning bits don't always survive gimplification; see e.g.
gimplify_modify_expr where we do
6130 if (COMPARISON_CLASS_P (*from_p))
6131 copy_warning (assign, *from_p);
but here we're not dealing with a comparison. Removing that check
regresses uninit-pr74762.C. Adding copy_warning (assign, *expr_p)
regresses c-c++-common/uninit-17.c.
PR target/104213
gcc/cp/ChangeLog:
* decl.cc (finish_constructor_body): Suppress -Wuse-after-free.
(finish_destructor_body): Likewise.
* optimize.cc (build_delete_destructor_body): Likewise.
gcc/ChangeLog:
* gimple-ssa-warn-access.cc (pass_waccess::warn_invalid_pointer): Don't
warn when the SSA_NAME_VAR of REF has supressed -Wuse-after-free.
gcc/testsuite/ChangeLog:
* g++.dg/warn/Wuse-after-free2.C: New test.
* g++.dg/warn/Wuse-after-free3.C: New test.
Jason Merrill [Wed, 26 Jan 2022 15:40:42 +0000 (10:40 -0500)]
c++: ->template and using-decl [PR104235]
cp_parser_template_id wasn't prepared to handle getting a USING_DECL back
from cp_parser_template_name. Let's defer that case to instantiation time,
as well.
PR c++/104235
gcc/cp/ChangeLog:
* parser.cc (cp_parser_template_name): Repeat lookup of USING_DECL.
gcc/testsuite/ChangeLog:
* g++.dg/parse/template-keyword2.C: New test.
Martin Liska [Wed, 26 Jan 2022 13:56:01 +0000 (14:56 +0100)]
IPA mod-ref: fix usage of --param names in dump messages.
gcc/ChangeLog:
* ipa-modref-tree.cc (modref_access_node::update):
Remove "--param param=foo" with "--param foo".
(modref_access_node::insert): Likewise.
(modref_access_node::insert_kill): Likewise.
* ipa-modref-tree.h (struct modref_ref_node): Likewise.
(struct modref_base_node): Likewise.
(struct modref_tree): Likewise.
gcc/testsuite/ChangeLog:
* gcc.dg/tree-ssa/modref-7.c: Update scanned patterns.
* gcc.dg/tree-ssa/modref-8.c: Likewise.
Raoni Fassina Firmino [Wed, 26 Jan 2022 15:05:54 +0000 (12:05 -0300)]
rtl: builtins: Fix builtins feclearexcept and feraiseexcept operand check [PR94193]
Commit
4343f5e25679 ("rtl: builtins: (not just) rs6000: Add builtins
for fegetround, feclearexcept and feraiseexcept [PR94193]") broke gcc
bootstra when building with --enable-checking=rtl[1].
The function expand_builtin_feclear_feraise_except was failing to
proper validate op0 predicate before emit_insn leading to the mismatch
type failure.
[1] https://gcc.gnu.org/pipermail/gcc-patches/2022-January/589186.html
2022-01-26 Raoni Fassina Firmino <raoni@linux.ibm.com>
gcc/
PR target/94193
* builtins.cc (expand_builtin_feclear_feraise_except): Add op0
predicate check.
Signed-off-by: Raoni Fassina Firmino <raoni@linux.ibm.com>
David Malcolm [Tue, 25 Jan 2022 19:10:46 +0000 (14:10 -0500)]
analyzer: fix missing uninit warning on args to stdio builtins [PR104224]
We were failing to check for uninitialized arguments to stdio builtins,
such as when passing local "go" to the call to "printf" in "main" in
the testcase.
gcc/analyzer/ChangeLog:
PR analyzer/104224
* region-model.cc (region_model::check_call_args): New.
(region_model::on_call_pre): Call it when ignoring stdio builtins.
* region-model.h (region_model::check_call_args): New decl
gcc/testsuite/ChangeLog:
PR analyzer/104224
* gcc.dg/analyzer/pr104224.c: New test.
Signed-off-by: David Malcolm <dmalcolm@redhat.com>
David Malcolm [Tue, 25 Jan 2022 16:35:24 +0000 (11:35 -0500)]
analyzer: fix sense in range::add_bound [PR94362]
Mikael Morin spotted that I got the sense wrong when discarding
redundant constraints in
r12-6782-gc4b8f3730a80025192fdb485ad2535c165340e41.
Fixed as follows, which also moves the rejection of contradictory
constraints in range::add_bound to earlier, so that this code can
be self-tested.
gcc/analyzer/ChangeLog:
PR analyzer/94362
* constraint-manager.cc (range::add_bound): Fix tests for
discarding redundant constraints. Perform test for rejecting
unsatisfiable constraints earlier so that they don't update
the object on failure.
(selftest::test_range): New.
(selftest::test_constant_comparisons): Add test coverage for
existing constraints becoming narrower until they are
unsatisfiable.
(selftest::run_constraint_manager_tests): Call test_range.
Signed-off-by: David Malcolm <dmalcolm@redhat.com>
Jakub Jelinek [Wed, 26 Jan 2022 10:58:27 +0000 (11:58 +0100)]
testsuite: Fix up pr104188.c testcase for i686-linux [PR104188]
On i686-linux this new testcase FAILs with:
cc1: warning: SSE instruction set disabled, using 387 arithmetics
FAIL: gcc.target/i386/pr104188.c (test for excess errors)
Excess errors:
cc1: warning: SSE instruction set disabled, using 387 arithmetics
This is because it uses -mfpmath=sse, but -msse2 isn't on. Fixed
by adding -msse2 to dg-options and requiring sse2_runtime effective
target.
2022-01-26 Jakub Jelinek <jakub@redhat.com>
PR target/104188
* gcc.target/i386/pr104188.c: Add dg-require-effective-target
sse2_runtime. Add -msse2 to dg-options.
Francois-Xavier Coudert [Wed, 26 Jan 2022 09:20:21 +0000 (10:20 +0100)]
Fortran: fix bootstrap on SPARC/Solaris
libgfortran/ChangeLog:
PR libfortran/104233
* ieee/issignaling_fallback.h: Check GFC_REAL_16_IS_FLOAT128
instead of __FLT128_IS_IEC_60559__.
Jason Merrill [Tue, 25 Jan 2022 20:12:16 +0000 (15:12 -0500)]
c++: alias template and typename [PR103057]
Usually we handle DR1558 substitution near the top of tsubst, but in this
case while substituting TYPENAME_TYPE we were passing an alias
specialization to tsubst_aggr_type, which ignored its aliasness.
PR c++/103057
gcc/cp/ChangeLog:
* pt.cc (tsubst_aggr_type): Call tsubst for alias template
specialization.
gcc/testsuite/ChangeLog:
* g++.dg/cpp0x/alias-decl-void1.C: New test.
GCC Administrator [Wed, 26 Jan 2022 00:16:38 +0000 (00:16 +0000)]
Daily bump.
Francois-Xavier Coudert [Tue, 25 Jan 2022 20:54:03 +0000 (21:54 +0100)]
Fortran: fix issignaling() implementation
libgfortran/ChangeLog:
* ieee/issignaling_fallback.h: Fix GCC-specific preprocessor
macros.
Martin Sebor [Tue, 25 Jan 2022 21:20:51 +0000 (14:20 -0700)]
Avoid recomputing PHI results after failure (PR104203).
Resolves:
PR tree-optimization/104203 - huge compile-time regression in pointer_query
gcc/ChangeLog:
PR tree-optimization/104203
* gimple-ssa-warn-access.cc (pass_data pass_data_waccess): Use
TV_WARN_ACCESS.
* pointer-query.cc (access_ref::merge_ref): Change return type.
Convert failure to a conservative success.
(access_ref::get_ref): Adjust to the change above. Short-circuit
PHI evaluation after first failure turned into conservative success.
* pointer-query.h (access_ref::merge_ref): Change return type.
* timevar.def (TV_WARN_ACCESS): New timer variable.
Jonathan Wakely [Tue, 25 Jan 2022 10:22:42 +0000 (10:22 +0000)]
libstdc++: Avoid some more warnings [PR104019]
With -fno-exceptions we get a -Wmisleading-indentation warning for:
if (cond)
__try {}
__catch (...) {}
This is because the __catch(...) expands to if (false), but is indented
as though it is controlled by the preceding 'if'. Surround it in braces.
The new make_shared<T[]> code triggers a bogus warning due to PR 61596,
which can be disabled with a pragma.
libstdc++-v3/ChangeLog:
PR libstdc++/104019
* include/bits/istream.tcc (basic_istream::sentry): Add braces
around try-block.
* include/bits/shared_ptr_base.h (_Sp_counted_array_base::_M_init):
Add pragmas to disable bogus warnings from PR 61596.
Jonathan Wakely [Tue, 25 Jan 2022 10:11:36 +0000 (10:11 +0000)]
libstdc++: Define _GNU_SOURCE for secure_getenv on Cygwin [PR104217]
For GNU/Linux G++ defines _GNU_SOURCE automatically, but not for Cygwin.
This means secure_getenv is not declared by Cygwin's <stdlib.h>, even
though autoconf detected it is present in the library. Define it in the
source files that want to use secure_getenv.
libstdc++-v3/ChangeLog:
PR libstdc++/104217
* src/c++17/fs_ops.cc (_GNU_SOURCE): Define.
* src/filesystem/dir.cc (_GNU_SOURCE): Define.
* src/filesystem/ops.cc (_GNU_SOURCE): Define.
Jonathan Wakely [Sun, 23 Jan 2022 21:45:16 +0000 (21:45 +0000)]
libstdc++: Avoid symlink race in filesystem::remove_all [PR104161]
This adds a new internal flag to the filesystem::directory_iterator
constructor that makes it fail if the path is a symlink that resolves to
a directory. This prevents filesystem::remove_all from following a
symlink to a directory, rather than deleting the symlink itself.
We can also use that new flag in recursive_directory_iterator to ensure
that we don't follow symlinks if the follow_directory_symlink option is
not set.
This also moves an error check in filesystem::remove_all after the while
loop, so that errors from the directory_iterator constructor are
reproted, instead of continuing to the filesystem::remove call below.
libstdc++-v3/ChangeLog:
PR libstdc++/104161
* acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for
fdopendir.
* config.h.in: Regenerate.
* configure: Regenerate.
* src/c++17/fs_dir.cc (_Dir): Add nofollow flag to constructor
and pass it to base class constructor.
(directory_iterator): Pass nofollow flag to _Dir constructor.
(fs::recursive_directory_iterator::increment): Likewise.
* src/c++17/fs_ops.cc (do_remove_all): Use nofollow option for
directory_iterator constructor. Move error check outside loop.
* src/filesystem/dir-common.h (_Dir_base): Add nofollow flag to
constructor and when it's set use ::open with O_NOFOLLOW and
O_DIRECTORY.
* src/filesystem/dir.cc (_Dir): Add nofollow flag to constructor
and pass it to base class constructor.
(directory_iterator): Pass nofollow flag to _Dir constructor.
(fs::recursive_directory_iterator::increment): Likewise.
* src/filesystem/ops.cc (remove_all): Use nofollow option for
directory_iterator constructor. Move error check outside loop.
Harald Anlauf [Tue, 25 Jan 2022 20:56:39 +0000 (21:56 +0100)]
Fortran: MOLD argument to TRANSFER intrinsic having storage size zero
gcc/fortran/ChangeLog:
PR fortran/104227
* check.cc (gfc_calculate_transfer_sizes): Fix checking of arrays
passed as MOLD argument to the TRANSFER intrinsic for having
storage size zero.
gcc/testsuite/ChangeLog:
PR fortran/104227
* gfortran.dg/transfer_check_6.f90: New test.
Harald Anlauf [Mon, 24 Jan 2022 20:40:41 +0000 (21:40 +0100)]
Fortran: optional argument DIM for intrinsics NORM2, PARITY must be scalar
gcc/fortran/ChangeLog:
PR fortran/104212
* check.cc (gfc_check_norm2): Check that optional argument DIM is
scalar.
(gfc_check_parity): Likewise.
gcc/testsuite/ChangeLog:
PR fortran/104212
* gfortran.dg/argument_checking_26.f90: New test.
Patrick Palka [Tue, 25 Jan 2022 20:04:49 +0000 (15:04 -0500)]
c++: deleted fn and noexcept inst [PR101532, PR104225]
Here when attempting to use B's implicitly deleted default constructor,
mark_used rightfully returns false, but for the wrong reason: it
tries to instantiate the synthesized noexcept specifier which then only
silently fails because get_defaulted_eh_spec suppresses diagnostics
for deleted functions. This lack of diagnostics causes us to crash on
the first testcase below (thanks to the assert in finish_expr_stmt), and
silently accept the second testcase.
To fix this, this patch makes mark_used avoid attempting to instantiate
the noexcept specifier of a deleted function, so that we'll instead
directly reject (and diagnose) the function due to its deletedness.
PR c++/101532
PR c++/104225
gcc/cp/ChangeLog:
* decl2.cc (mark_used): Don't consider maybe_instantiate_noexcept
on a deleted function.
gcc/testsuite/ChangeLog:
* g++.dg/cpp0x/nsdmi-template21.C: New test.
* g++.dg/cpp0x/nsdmi-template21a.C: New test.
Jason Merrill [Mon, 24 Jan 2022 05:01:40 +0000 (00:01 -0500)]
c++: assignment to temporary [PR59950]
Given build_this of a TARGET_EXPR, cp_build_fold_indirect_ref returns the
TARGET_EXPR. But that's the wrong value category for the result of the
defaulted class assignment operator, which returns an lvalue, so we need to
actually build the INDIRECT_REF.
PR c++/59950
gcc/cp/ChangeLog:
* call.cc (build_over_call): Use cp_build_indirect_ref.
gcc/testsuite/ChangeLog:
* g++.dg/init/assign2.C: New test.
Thomas Schwinge [Tue, 25 Jan 2022 17:44:02 +0000 (18:44 +0100)]
Revert "Fix PR 67102: Add libstdc++ dependancy to libffi" [PR67102]
This reverts commit
db1a65d9364fe72c2fff65fb2dec051728b6f3fa.
On 2021-09-17T01:01:39-0700, Andrew Pinski via Gcc-patches <gcc-patches@gcc.gnu.org> wrote:
> On Fri, Sep 17, 2021 at 12:46 AM Thomas Schwinge <thomas@codesourcery.com> wrote:
>> On 2021-09-15T13:56:37-0700, apinski--- via Gcc-patches <gcc-patches@gcc.gnu.org> wrote:
>> > The error message is obvious -funconfigured-libstdc++-v3 is used
>> > on the g++ command line. So we just add the dependancy.
>>
>> > --- a/Makefile.def
>> > +++ b/Makefile.def
>> > @@ -592,6 +592,7 @@ dependencies = { module=configure-target-fastjar; on=configure-target-zlib; };
>> > dependencies = { module=all-target-fastjar; on=all-target-zlib; };
>> > dependencies = { module=configure-target-libgo; on=configure-target-libffi; };
>> > dependencies = { module=configure-target-libgo; on=all-target-libstdc++-v3; };
>> > +dependencies = { module=configure-target-libffi; on=all-target-libstdc++-v3; };
>> > dependencies = { module=all-target-libgo; on=all-target-libbacktrace; };
>> > dependencies = { module=all-target-libgo; on=all-target-libffi; };
>> > dependencies = { module=all-target-libgo; on=all-target-libatomic; };
>>
>> I'm confused, because given that this 'Makefile.def' change only has the
>> following effect:
>>
>> > --- a/Makefile.in
>> > +++ b/Makefile.in
>> > @@ -61261,6 +61261,7 @@ all-bison: maybe-all-intl
>> > all-flex: maybe-all-intl
>> > all-m4: maybe-all-intl
>> > configure-target-libgo: maybe-all-target-libstdc++-v3
>> > +configure-target-libffi: maybe-all-target-libstdc++-v3
>> > configure-target-liboffloadmic: maybe-configure-target-libgomp
>> > all-target-liboffloadmic: maybe-all-target-libgomp
>> > configure-target-newlib: maybe-all-binutils
>>
>> ... isn't that actually a no-op, because we already had such a dependency
>> listed? Now twice:
>>
>> $ grep -n -F 'configure-target-libffi: maybe-all-target-libstdc++-v3' -- Makefile.in
>> 61264:configure-target-libffi: maybe-all-target-libstdc++-v3
>> 61372:configure-target-libffi: maybe-all-target-libstdc++-v3
>>
>> Compared to the existing one, the one you've added is additionally
>> restricted by '@unless gcc-bootstrap'.
>>
>> I noticed this as I remembered that on our og[...] development branches
>> we have a patch in the opposite direction: get rid of this dependency via
>> removing 'lang_env_dependencies = { module=libffi; cxx=true; };' from
>> 'Makefile.def'. See
>> <http://mid.mail-archive.com/alpine.DEB.2.21.9999.
1812201344250.99920@build7-trusty-cs.sje.mentorg.com>
>> "Disable libstdc++ dependency for libffi". (Maciej CCed in case you have
>> any further thoughts on that.)
>
> Oh, I see what happened now, the old bug was actually fixed by r6-5415
> which added cxx=true.
> So yes my patch is actually not needed and can be reverted.
> I tried to look to see if there was a dependency was there but for
> some reason I did not see it.
David Edelsohn [Tue, 25 Jan 2022 15:18:28 +0000 (10:18 -0500)]
aix: AIX is not GLIBC.
A recent patch added tests for OPTION_GLIBC that is defined in
linux.h and linux64.h. This broke bootstrap for non-Linux rs6000
configurations. This patch defines OPTION_GLIBC as 0.
* config/rs6000/aix.h (OPTION_GLIBC): Define as 0.
Jakub Jelinek [Tue, 25 Jan 2022 11:48:35 +0000 (12:48 +0100)]
libfortran: Provide fallback __issignalingl for IBM extended long double
On Mon, Jan 17, 2022 at 12:11:59AM +0100, FX via Gcc-patches wrote:
> This patch is the third in my “signaling NaN” series.
> For targets with IEEE support but without the issignaling macro in libc
> (i.e., everywhere except glibc), this allows us to provide a fallback
> implementation.
This doesn't seem to handle the powerpc* IBM double double long double.
__LDBL_IS_IEC_60559__ isn't defined for this type, because it is far from
an IEEE754 type, but it has signaling NaNs - as can be seen in glibc
libc/sysdeps/ieee754/ldbl-128ibm/s_issignalingl.c
the type is a pair of doubles and whether it is a sNaN or qNaN is determined
by whether the first double is a sNaN or qNaN.
2022-01-25 Jakub Jelinek <jakub@redhat.com>
* ieee/issignaling_fallback.h (__issignalingl): Define for
IBM extended long double are returning __issignaling on the
first double.
Richard Biener [Tue, 25 Jan 2022 10:55:28 +0000 (11:55 +0100)]
tree-optimization/104214 - amend PR100740 fix for pointer compares
When we have a pointer relational compare we have stronger guarantees
about overflow, in particular rewriting BASE0 + STEP0 cmp BASE1 + STEP1
as BASE0 + STEP0 - STEP1 cmp BASE1 is always valid and the new IV0
does not overflow. The patch basically reverts the previous change
when pointers are involved, keeping only the more conservative handling
for equality compares which can involve comparing different object
addresses.
2022-01-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/104214
* tree-ssa-loop-niter.cc (number_of_iterations_cond): Use
stronger guarantees for relational pointer compares when
rewriting BASE0 + STEP0 cmp BASE1 + STEP1 as
BASE0 + STEP0 - STEP1 cmp BASE1.
* gcc.dg/vect/pr81196-2.c: New variant testcase only
requiring vect_int.
Florian Weimer [Tue, 25 Jan 2022 11:09:56 +0000 (12:09 +0100)]
libgcc: Fix _Unwind_Find_FDE for missing unwind data with glibc 2.35
_dl_find_object returns success even if no unwind information has been
found, and dlfo_eh_frame is NULL.
libgcc/ChangeLog:
PR libgcc/104207
* unwind-dw2-fde-dip.c (_Unwind_Find_FDE): Add NULL check.
Francois-Xavier Coudert [Tue, 25 Jan 2022 10:35:56 +0000 (11:35 +0100)]
Fortran: fix preprocessor condition
libgfortran/ChangeLog:
* ieee/issignaling_fallback.h: fix preprocessor condition.
Francois-Xavier Coudert [Tue, 25 Jan 2022 08:07:19 +0000 (09:07 +0100)]
Fortran: do not run signaling testsuite on 32-bit x86/x86_64
gcc/testsuite/ChangeLog:
* gfortran.dg/ieee/signaling_3.f90: Skip test on 32-bit x86/x86_64.
Francois-Xavier Coudert [Tue, 25 Jan 2022 07:59:52 +0000 (08:59 +0100)]
Fortran: fix typo in signaling NaN testcase
gcc/testsuite/ChangeLog:
* gfortran.dg/ieee/signaling_1.f90: Fix test.
Jakub Jelinek [Tue, 25 Jan 2022 04:49:05 +0000 (05:49 +0100)]
rs6000: Remove GCC 8.1 U10__float128 mangling compatibility [PR104172]
In GCC 7.x and earlier, while it had -mabi=ieeelongdouble option, that option
was undocumented and unsupported.
In GCC 8.1 that option got documented and -mabi=ieeelongdouble long double started
to be mangled as U10__float128.
In GCC 9 and backported to before 8.2 release, that mangling changed to
u9__ieee128 and a support for emitting compatibility mangling aliases have
been added.
Unfortunately, as mentioned in the PR, those don't really work well in many
cases, the free_lang_data pass throws away important trees, so e.g. with
-flto -ffat-lto-objects the compiler often ICEs on templates that involve
IEEE quad long double arguments etc. because the mangling was done too late
(at final time).
Furthermore, lto1's mangler is not the C++ mangler, so with -flto it would
often emit as "mangled identifiers" something that wasn't a valid assembler
identifier, e.g. operator+ etc.
While it is possible to do such mangling earlier, e.g. at the same time when
the C++ FE emits its mangling aliases and untested proof of concept is in
the PR, there seems to be agreement that we shouldn't bother with this
ABI compatibility with something that probably nobody really used.
GCC 8.2 already uses the new mangling, it was just a few months, but more
importantly, libstdc++ support for IEEE quad long double on
powerpc64le-linux was only added in GCC 11, and glibc support for that some
weeks after 8.2 got released.
So, the following patch just drops those aliases.
2022-01-25 Jakub Jelinek <jakub@redhat.com>
PR target/104172
gcc/
* config/rs6000/rs6000-internal.h (rs6000_passes_ieee128): Don't
declare.
* config/rs6000/rs6000.cc (rs6000_passes_ieee128,
ieee128_mangling_gcc_8_1): Remove.
(TARGET_ASM_GLOBALIZE_DECL_NAME): Don't redefine.
(rs6000_mangle_type): Return "u9__ieee128" instead of
ieee128_mangling_gcc_8_1 ? "U10__float128" : "u9__ieee128".
(rs6000_globalize_decl_name): Remove.
* config/rs6000/rs6000-call.cc (init_cumulative_args,
rs6000_function_arg_advance_1): Don't set rs6000_passes_ieee128.
GCC Administrator [Tue, 25 Jan 2022 00:16:27 +0000 (00:16 +0000)]
Daily bump.
Martin Sebor [Mon, 24 Jan 2022 23:02:05 +0000 (16:02 -0700)]
Remove duplicate code block.
gcc/ChangeLog:
* pointer-query.cc (pointer_query::dump): Remove duplicate
block.
Marek Polacek [Thu, 20 Jan 2022 00:05:22 +0000 (19:05 -0500)]
preprocessor: -Wbidi-chars and UCNs [PR104030]
Stephan Bergmann reported that our -Wbidi-chars breaks the build
of LibreOffice because we warn about UCNs even when their usage
is correct: LibreOffice constructs strings piecewise, as in:
aText = u"\u202D" + aText;
and warning about that is overzealous. Since no editor (AFAIK)
interprets UCNs to show them as Unicode characters, there's less
risk in misinterpreting them, and so perhaps we shouldn't warn
about them by default. However, identifiers containing UCNs or
programs generating other programs could still cause confusion,
so I'm keeping the UCN checking. To turn it on, you just need
to use -Wbidi-chars=unpaired,ucn or -Wbidi-chars=any,ucn.
The implementation is done by using the new EnumSet feature.
PR preprocessor/104030
gcc/c-family/ChangeLog:
* c.opt (Wbidi-chars): Mark as EnumSet. Also accept =ucn.
gcc/ChangeLog:
* doc/invoke.texi: Update documentation for -Wbidi-chars.
libcpp/ChangeLog:
* include/cpplib.h (enum cpp_bidirectional_level): Add
bidirectional_ucn. Set values explicitly.
* internal.h (cpp_reader): Adjust warn_bidi_p.
* lex.cc (maybe_warn_bidi_on_close): Don't warn about UCNs
unless UCN checking is on.
(maybe_warn_bidi_on_char): Likewise.
gcc/testsuite/ChangeLog:
* c-c++-common/Wbidi-chars-10.c: Turn on UCN checking.
* c-c++-common/Wbidi-chars-11.c: Likewise.
* c-c++-common/Wbidi-chars-14.c: Likewise.
* c-c++-common/Wbidi-chars-16.c: Likewise.
* c-c++-common/Wbidi-chars-17.c: Likewise.
* c-c++-common/Wbidi-chars-4.c: Likewise.
* c-c++-common/Wbidi-chars-5.c: Likewise.
* c-c++-common/Wbidi-chars-6.c: Likewise.
* c-c++-common/Wbidi-chars-7.c: Likewise.
* c-c++-common/Wbidi-chars-8.c: Likewise.
* c-c++-common/Wbidi-chars-9.c: Likewise.
* c-c++-common/Wbidi-chars-ranges.c: Likewise.
* c-c++-common/Wbidi-chars-18.c: New test.
* c-c++-common/Wbidi-chars-19.c: New test.
* c-c++-common/Wbidi-chars-20.c: New test.
* c-c++-common/Wbidi-chars-21.c: New test.
* c-c++-common/Wbidi-chars-22.c: New test.
* c-c++-common/Wbidi-chars-23.c: New test.
Francois-Xavier Coudert [Mon, 17 Jan 2022 11:46:48 +0000 (12:46 +0100)]
Fortran: provide a fallback implementation of issignaling
For targets with IEEE support but without the issignaling macro in libc
(currently, everywhere except glibc), this allows us to provide a fallback
implementation. In order to keep the code in ieee_helper.c relatively
readable, I've put that new implementation in a separate file,
issignaling_fallback.h.
libgfortran/ChangeLog:
* ieee/issignaling_fallback.h: New file.
* ieee/ieee_helper.c: Include issignaling_fallback.h when target
does not define issignaling macro.
gcc/testsuite/ChangeLog:
* gfortran.dg/ieee/signaling_1.f90: Do not require issignaling.
* gfortran.dg/ieee/signaling_2.f90: Add comment.
* gfortran.dg/ieee/signaling_3.f90: New test.
Raoni Fassina Firmino [Thu, 13 Jan 2022 17:08:53 +0000 (14:08 -0300)]
rtl: builtins: (not just) rs6000: Add builtins for fegetround, feclearexcept and feraiseexcept [PR94193]
This optimizations were originally in glibc, but was removed
and suggested that they were a good fit as gcc builtins[1].
feclearexcept and feraiseexcept were extended (in comparison to the
glibc version) to accept any combination of the accepted flags, not
limited to just one flag bit at a time anymore.
The builtin expanders needs knowledge of the target libc's FE_*
values, so they are limited to expand only to suitable libcs.
[1] https://sourceware.org/legacy-ml/libc-alpha/2020-03/msg00047.html
https://sourceware.org/legacy-ml/libc-alpha/2020-03/msg00080.html
2020-08-13 Raoni Fassina Firmino <raoni@linux.ibm.com>
gcc/
PR target/94193
* builtins.cc (expand_builtin_fegetround): New function.
(expand_builtin_feclear_feraise_except): New function.
(expand_builtin): Add cases for BUILT_IN_FEGETROUND,
BUILT_IN_FECLEAREXCEPT and BUILT_IN_FERAISEEXCEPT.
* config/rs6000/rs6000.md (fegetroundsi): New pattern.
(feclearexceptsi): New Pattern.
(feraiseexceptsi): New Pattern.
* doc/extend.texi: Add a new introductory paragraph about the
new builtins.
* doc/md.texi: (fegetround@var{m}): Document new optab.
(feclearexcept@var{m}): Document new optab.
(feraiseexcept@var{m}): Document new optab.
* optabs.def (fegetround_optab): New optab.
(feclearexcept_optab): New optab.
(feraiseexcept_optab): New optab.
gcc/testsuite/
PR target/94193
* gcc.target/powerpc/builtin-feclearexcept-feraiseexcept-1.c: New test.
* gcc.target/powerpc/builtin-feclearexcept-feraiseexcept-2.c: New test.
* gcc.target/powerpc/builtin-fegetround.c: New test.
Signed-off-by: Raoni Fassina Firmino <raoni@linux.ibm.com>
Patrick Palka [Mon, 24 Jan 2022 16:47:13 +0000 (11:47 -0500)]
c++: Fix non-portable default argument of make_auto_1 [PR104197]
Avoid using the macro current_template_depth, which expands to an
expression that uses __FUNCTION__, within the signature of a function.
PR c++/104197
gcc/cp/ChangeLog:
* pt.cc (make_auto_1): Use -1 as a placeholder default argument
for level.
Patrick Palka [Mon, 24 Jan 2022 14:17:35 +0000 (09:17 -0500)]
c++: value category of compound object expr [PR104173]
Here the call to (the &&-qualified) toLower() is incorrectly rejected
during overload resolution because the object expression is encoded as
an lvalue when it's really a prvalue. The object expression,
instance()->applicationName(), is encoded as an INDIRECT_REF of a
COMPOUND_EXPR
*(*instance ();, &TARGET_EXPR <D.2383, QCoreApplication::applicationName ()>;);
which lvalue_kind deems an lvalue.
This issue is similar to PR88103 except that here the original compound
object expression is a prvalue rather than an xvalue. The fix there was to
adjust the result of unary_complex_lvalue in build_class_member_access_expr
so that xvalueness of the original expression is preserved. This patch
extends that fix so that rvalueness is preserved more generally.
PR c++/104173
gcc/cp/ChangeLog:
* typeck.cc (build_class_member_access_expr): Extend
unary_complex_lvalue result adjustment to preserve all
rvalues, not just xvalues.
gcc/testsuite/ChangeLog:
* g++.dg/cpp0x/ref-qual21.C: New test.
Martin Liska [Mon, 24 Jan 2022 12:03:01 +0000 (13:03 +0100)]
gcc-changelog: Be stricter for top-level dir.
contrib/ChangeLog:
* gcc-changelog/git_commit.py: New files in toplev must
be explicitly marked as "New file".
* gcc-changelog/test_email.py: Test.
* gcc-changelog/test_patches.txt: Add test.
Richard Biener [Mon, 24 Jan 2022 10:50:06 +0000 (11:50 +0100)]
tree-optimization/102131 - fix niter analysis wrt overflow
This fixes the overflow issues seen with analyzing
BASE0 + STEP0 cmp BASE1 + STEP1 as BASE0 + STEP0 - STEP1 cmp BASE1
by following the logic we have when simplifying comparisons.
2022-01-24 Richard Biener <rguenther@suse.de>
Jiufu Guo <guojiufu@linux.ibm.com>
PR tree-optimization/100740
PR tree-optimization/101508
PR tree-optimization/101972
PR tree-optimization/102131
* tree-ssa-loop-niter.cc (number_of_iterations_cond): Properly
constrain BASE0 + STEP0 cmp BASE1 + STEP1 to
BASE0 + STEP0 - STEP1 cmp BASE1 transform.
* gcc.dg/torture/pr100740.c: New testcase.
* gcc.dg/torture/pr101508.c: Likewise.
* gcc.dg/torture/pr101972.c: Likewise.
* gcc.dg/torture/pr102131-1.c: Likewise.
* gcc.dg/torture/pr102131-2.c: Likewise.
* gcc.dg/torture/pr102131-3.c: Likewise.
* gcc.dg/torture/pr102131-4.c: Likewise.
Martin Liska [Mon, 24 Jan 2022 10:40:52 +0000 (11:40 +0100)]
acinclude.m4: Remove duplicite AC_DEFUN.
libatomic/ChangeLog:
* acinclude.m4: Remove duplicate
LIBAT_CHECK_LINKER_FEATURES.
* configure: Regenerate.
Jakub Jelinek [Mon, 24 Jan 2022 10:53:08 +0000 (11:53 +0100)]
options: Add EnumBitSet property support [PR104158]
On Sat, Jan 22, 2022 at 01:47:08AM +0100, Jakub Jelinek via Gcc-patches wrote:
> I think with the 2) patch I achieve what we want for Fortran, for 1)
> the only behavior from gcc 11 is that
> -fsanitize-coverage=trace-cmp,trace-cmp is now rejected.
> This is mainly from the desire to disallow
> -fconvert=big-endian,little-endian or -Wbidi-chars=bidirectional,any
> etc. where it would be confusing to users what exactly it means.
> But it is the only from these options that actually acts as an Enum
> bit set, each enumerator can be specified with all the others.
> So one option would be stop requiring the EnumSet implies Set properties
> must be specified and just require that either they are specified on all
> EnumValues, or on none of them; the latter case would be for
> -fsanitize-coverage= and the non-Set case would mean that all the
> EnumValues need to have disjoint Value bitmasks and that they can
> be all specified and unlike the Set case also repeated.
> Thoughts on this?
Here is an incremental patch to the first two patches of the series
that implements EnumBitSet that fully restores the -fsanitize-coverage
GCC 11 behavior.
2022-01-24 Jakub Jelinek <jakub@redhat.com>
PR sanitizer/104158
* opt-functions.awk (var_set): Handle EnumBitSet property.
* optc-gen.awk: Don't disallow RejectNegative if EnumBitSet is
specified.
* opts.h (enum cl_enum_var_value): New type.
* opts-common.cc (decode_cmdline_option): Use CLEV_* values.
Handle CLEV_BITSET.
(cmdline_handle_error): Handle CLEV_BITSET.
* opts.cc (test_enum_sets): Also test EnumBitSet requirements.
* doc/options.texi (EnumBitSet): Document.
* common.opt (fsanitize-coverage=): Use EnumBitSet instead of
EnumSet.
(trace-pc, trace-cmp): Drop Set properties.
* gcc.dg/sancov/pr104158-7.c: Adjust for repeating of arguments
being allowed.
Jakub Jelinek [Mon, 24 Jan 2022 10:52:30 +0000 (11:52 +0100)]
fortran: Extend -fconvert= option for ppc64le r16_ieee and r16_ibm
This patch on top of the previously posted option handling changes patch
allows specifying -fconvert=swap,r16_ieee etc. (but will error on it
when not on powerpc64le because in the library such swapping is only
implemented for HAVE_REAL_17).
2022-01-24 Jakub Jelinek <jakub@redhat.com>
* lang.opt (fconvert=): Add EnumSet property and mention also
r16_ieee and r16_ibm arguments.
(big-endian, little-endian, native, swap): Add Set(1) property.
(r16_ieee, r16_ibm): New EnumValue entries with Set(2) property.
* trans-types.cc (gfc_init_kinds): Emit gfc_fatal_error for
-fconvert=r16_ieee or -fconvert=r16_ibm when R16_IEEE <=> R16_IBM
conversions aren't supported.
Jakub Jelinek [Mon, 24 Jan 2022 10:51:49 +0000 (11:51 +0100)]
options: Fix up -fsanitize-coverage= [PR104158]
This is incremental patch to fix up -fsanitize-coverage= option
handling, allow -fno-sanitize-coverage= again, allow both
options together in one option or make
-fsanitize-coverage=trace-pc -fsanitize-coverage=trace-cmp
actually enable both suboptions rather than the last one.
2022-01-24 Jakub Jelinek <jakub@redhat.com>
PR sanitizer/104158
* common.opt (flag_sanitize_coverage): Remove Variable entry.
(fsanitize-coverage=): Remove RejectNegative property, add
Var(flag_sanitize_coverage) and EnumSet properties.
(trace-pc): Add Set(1) property.
(trace-cmp): Add Set(2) property.
* opts.cc (common_handle_option): Don't handle
OPT_fsanitize_coverage_.
* gcc.dg/spellcheck-options-24.c: New test.
* gcc.dg/sancov/pr104158-1.c: New test.
* gcc.dg/sancov/pr104158-2.c: New test.
* gcc.dg/sancov/pr104158-3.c: New test.
* gcc.dg/sancov/pr104158-4.c: New test.
* gcc.dg/sancov/pr104158-5.c: New test.
* gcc.dg/sancov/pr104158-6.c: New test.
* gcc.dg/sancov/pr104158-7.c: New test.
Jakub Jelinek [Mon, 24 Jan 2022 10:50:15 +0000 (11:50 +0100)]
options: Add EnumSet and Set property support [PR104158]
The following patch is infrastructure support for at least 3 different
options that need changes:
1) PR104158 talks about a regression with the -fsanitizer-coverage=
option; in GCC 11 and older and on trunk prior to r12-1177, this
option behaved similarly to -f{,no-}sanitizer{,-recover}= options,
namely that the option allows negative and argument of the option
is a list of strings, each of them has some enumerator and
-fsanitize-coverage= enabled those bits in the underlying
flag_sanitize_coverage, while -fno-sanitize-coverage= disabled them.
So, -fsanitize-coverage=trace-pc,trace-cmp was equivalent to
-fsanitize-coverage=trace-pc -fsanitize-coverage=trace-cmp and both
set flag_sanitize_coverage to
(SANITIZE_COV_TRACE_PC | SANITIZE_COV_TRACE_CMP)
Also, e.g.
-fsanitize-coverage=trace-pc,trace-cmp -fno-sanitize-coverage=trace-pc
would in the end set flag_sanitize_coverage to
SANITIZE_COV_TRACE_CMP (first set both bits, then subtract one)
The r12-1177 change, I think done to improve argument misspelling
diagnostic, changed the option incompatibly in multiple ways,
-fno-sanitize-coverage= is now rejected, only a single argument
is allowed, not multiple and
-fsanitize-coverage=trace-pc -fsanitize-coverage=trace-cmp
enables just SANITIZE_COV_TRACE_CMP and not both (each option
overrides the previous value)
2) Thomas Koenig wants to extend Fortran -fconvert= option for the
ppc64le real(kind=16) swapping support; currently the option
accepts -fconvert={native,swap,big-endian,little-endian} and the
intent is to add support for -fconvert=r16_ibm and -fconvert=r16_ieee
(that alone is just normal Enum), but also to handle
-fconvert=swap,r16_ieee or -fconvert=r16_ieee,big-endian but not
-fconvert=big-endian,little-endian - the
native/swap/big-endian/little-endian are one mutually exclusive set
and r16_ieee/r16_ibm another one.
See https://gcc.gnu.org/pipermail/gcc-patches/2022-January/587943.html
and thread around that.
3) Similarly Marek Polacek wants to extend the -Wbidi-chars= option,
such that it will handle not just the current
-Wbidi-chars={none,bidirectional,any}, but also -Wbidi-chars=ucn
and bidirectional,ucn and ucn,any etc. Again two separate sets,
one none/bidirectional/any and another one ucn.
See https://gcc.gnu.org/pipermail/gcc-patches/2022-January/588960.html
The following patch adds framework for this and I'll post incremental
patches for 1) and 2).
As I've tried to document, such options are marked by additional
EnumSet property on the option and in that case all the EnumValues
in the Enum referenced from it must use a new Set property with set
number (initially I wanted just mark last enumerator in each mutually
exclusive set, but optionlist is sorted and so it doesn't really work
well). So e.g. for the Fortran -fconvert=, one specifies:
fconvert=
Fortran RejectNegative Joined Enum(gfc_convert) EnumSet Var(flag_convert) Init(GFC_FLAG_CONVERT_NATIVE)
-fconvert=<big-endian|little-endian|native|swap|r16_ieee|r16_ibm> The endianness used for unformatted files.
Enum
Name(gfc_convert) Type(enum gfc_convert) UnknownError(Unrecognized option to endianness value: %qs)
EnumValue
Enum(gfc_convert) String(big-endian) Value(GFC_FLAG_CONVERT_BIG) Set(1)
EnumValue
Enum(gfc_convert) String(little-endian) Value(GFC_FLAG_CONVERT_LITTLE) Set(1)
EnumValue
Enum(gfc_convert) String(native) Value(GFC_FLAG_CONVERT_NATIVE) Set(1)
EnumValue
Enum(gfc_convert) String(swap) Value(GFC_FLAG_CONVERT_SWAP) Set(1)
EnumValue
Enum(gfc_convert) String(r16_ieee) Value(GFC_FLAG_CONVERT_R16_IEEE) Set(2)
EnumValue
Enum(gfc_convert) String(r16_ibm) Value(GFC_FLAG_CONVERT_R16_IBM) Set(2)
and this says to the option handling code that
1) if only one arg is specified to one instance of the option, it can be any
of those 6
2) if two args are specified, one has to be from the first 4 and another
from the last 2, in any order
3) at most 2 args may be specified (there are just 2 sets)
There is a requirement on the Value values checked in self-test, the
values from one set ored together must be disjunct from values from
another set ored together. In the Fortran case, the first 4 are 0-3
so mask is 3, and the last 2 are 4 and 8, so mask is 12.
When say -fconvert=big-endian is specified, it sets the first set
to GFC_FLAG_CONVERT_BIG (2) but doesn't modify whatever value the
other set had, so e.g.
-fconvert=big-endian -fconvert=r16_ieee
-fconvert=r16_ieee -fconvert=big-endian
-fconvert=r16_ieee,big_endian
-fconvert=big_endian,r16_ieee
all behave the same.
Also, with the EnumSet support, it is now possible to allow
not specifying RejectNegative - we can set some set's value and
then clear it and set it again to some other value etc.
I think with the 2) patch I achieve what we want for Fortran, for 1)
the only behavior from gcc 11 is that
-fsanitize-coverage=trace-cmp,trace-cmp is now rejected.
This is mainly from the desire to disallow
-fconvert=big-endian,little-endian or -Wbidi-chars=bidirectional,any
etc. where it would be confusing to users what exactly it means.
But it is the only from these options that actually acts as an Enum
bit set, each enumerator can be specified with all the others.
So one option would be stop requiring the EnumSet implies Set properties
must be specified and just require that either they are specified on all
EnumValues, or on none of them; the latter case would be for
-fsanitize-coverage= and the non-Set case would mean that all the
EnumValues need to have disjoint Value bitmasks and that they can
be all specified and unlike the Set case also repeated.
Thoughts on this?
2022-01-24 Jakub Jelinek <jakub@redhat.com>
PR sanitizer/104158
* opt-functions.awk (var_set): Handle EnumSet property.
* optc-gen.awk: Don't disallow RejectNegative if EnumSet is
specified.
* opt-read.awk: Handle Set property.
* opts.h (CL_ENUM_SET_SHIFT, CL_ERR_ENUM_SET_ARG): Define.
(struct cl_decoded_option): Mention enum in value description.
Add mask member.
(set_option): Add mask argument defaulted to 0.
* opts.cc (test_enum_sets): New function.
(opts_cc_tests): Call it.
* opts-common.cc (enum_arg_to_value): Change return argument
from bool to int, on success return index into the cl_enum_arg
array, on failure -1. Add len argument, if non-0, use strncmp
instead of strcmp.
(opt_enum_arg_to_value): Adjust caller.
(decode_cmdline_option): Handle EnumSet represented as
CLVC_ENUM with non-zero var_value. Initialize decoded->mask.
(decode_cmdline_options_to_array): CLear opt_array[0].mask.
(handle_option): Pass decoded->mask to set_options last argument.
(generate_option): Clear decoded->mask.
(generate_option_input_file): Likewise.
(cmdline_handle_error): Handle CL_ERR_ENUM_SET_ARG.
(set_option): Add mask argument, use it for CLVC_ENUM.
(control_warning_option): Adjust enum_arg_to_value caller.
* doc/options.texi: Document Set and EnumSet properties.
Jakub Jelinek [Mon, 24 Jan 2022 10:13:39 +0000 (11:13 +0100)]
properly disable -fsplit-stack on non-glibc targets [PR104170]
On Sat, Jan 22, 2022 at 10:32:21AM +0100, Martin Liška wrote:
> I've just noticed the patch broke a few cross compilers:
>
> s390x-ibm-tpf:
>
> /home/marxin/buildworker/zen2-cross-compilers/build/gcc/common/config/s390/s390-common.cc: In function ‘bool s390_supports_split_stack(bool, gcc_options*)’:
> /home/marxin/buildworker/zen2-cross-compilers/build/gcc/common/config/s390/s390-common.cc:126:13: error: ‘struct gcc_options’ has no member named ‘x_linux_libc’
> 126 | if (opts->x_linux_libc == LIBC_GLIBC)
> | ^~~~~~~~~~~~
>
> i686-kopensolaris-gnu, i686-symbolics-gnu
>
> /home/marxin/buildworker/zen2-cross-compilers/build/gcc/common/config/i386/i386-common.cc: In function ‘bool ix86_supports_split_stack(bool, gcc_options*)’:
> /home/marxin/buildworker/zen2-cross-compilers/build/gcc/common/config/i386/i386-common.cc:1721:13: error: ‘struct gcc_options’ has no member named ‘x_linux_libc’
> 1721 | if (opts->x_linux_libc != LIBC_GLIBC)
> | ^~~~~~~~~~~~
> make[1]: *** [Makefile:2418: i386-common.o] Error 1
>
> Can you please take a look? Btw. do you have a bugzilla account?
I bet instead of opts->x_linux_libc != LIBC_GLIBC it needs to use
#ifdef OPTION_GLIBC
if (!OPTION_GLIBC)
#endif
or so. I think the first committed patch actually used that
but used it in #if directive, which is wrong because it is something
that needs to be evaluated at runtime.
That doesn't work well either, because the *supports_split_stack
hooks have opts argument and OPTION_GLIBC doesn't take that.
So, here is a patch that introduces OPTION_*_P macros that take opts
as an argument and redefines OPTION_* using those (similarly to how
the option scripts create TARGET_*_P and TARGET_* macros).
2022-01-24 Jakub Jelinek <jakub@redhat.com>
PR bootstrap/104170
* config/linux.h (OPTION_GLIBC_P, OPTION_UCLIBC_P,
OPTION_BIONIC_P, OPTION_MUSL_P): Define.
(OPTION_GLIBC, OPTION_UCLIBC, OPTION_BIONIC, OPTION_MUSL): Redefine
using OPTION_*_P macros.
* config/alpha/linux.h (OPTION_GLIBC_P, OPTION_UCLIBC_P,
OPTION_BIONIC_P, OPTION_MUSL_P): Define.
(OPTION_GLIBC, OPTION_UCLIBC, OPTION_BIONIC, OPTION_MUSL): Redefine
using OPTION_*_P macros.
* config/rs6000/linux.h (OPTION_GLIBC_P, OPTION_UCLIBC_P,
OPTION_BIONIC_P, OPTION_MUSL_P): Define.
(OPTION_GLIBC, OPTION_UCLIBC, OPTION_BIONIC, OPTION_MUSL): Redefine
using OPTION_*_P macros.
* config/rs6000/linux64.h (OPTION_GLIBC_P, OPTION_UCLIBC_P,
OPTION_BIONIC_P, OPTION_MUSL_P): Define.
(OPTION_GLIBC, OPTION_UCLIBC, OPTION_BIONIC, OPTION_MUSL): Redefine
using OPTION_*_P macros.
* config/fuchsia.h (OPTION_MUSL_P): Redefine.
* config/glibc-stdint.h (OPTION_MUSL_P): Define if not defined.
* common/config/s390/s390-common.cc (s390_supports_split_stack): Re-add
ATTRIBUTE_UNUSED to opts parameter. If OPTION_GLIBC_P is defined, use
OPTION_GLIBC_P (opts) as condition, otherwise assume if (false).
* common/config/i386/i386-common.cc (ix86_supports_split_stack): If
OPTION_GLIBC_P is defined use !OPTION_GLIBC_P (opts) as condition,
otherwise assume if (true).
Kito Cheng [Mon, 24 Jan 2022 09:40:45 +0000 (17:40 +0800)]
RISC-V: Fix testcase after bump isa spec version
Extension version might be different among different ISA spec version,
add explicitly isa-spec version to prevent that might fail when build
GCC with different default ISA version.
gcc/testsuite/ChangeLog
* gcc.target/riscv/attribute-19.c: Add -misa-spec=2.2
Kito Cheng [Mon, 24 Jan 2022 07:46:10 +0000 (15:46 +0800)]
RISC-V: Do not emit zcisr and zifencei if i-ext is 2.0
I-ext 2.0 already included zicsr and zifencei, skip that prevent
confusing binutils.
gcc/ChangeLog
* common/config/riscv/riscv-common.cc (riscv_subset_list::to_string):
Skip zicsr and zifencei if I-ext is 2.0.
Jia-Wei Chen [Tue, 18 Jan 2022 02:34:24 +0000 (10:34 +0800)]
RISC-V: Change default ISA version into
20191213
Bump default ISA spec to newer version
20191213, current default ISA spec
is 2.2, but it's already out of date for a long time, sync with binutils
ISA version, convention in toolchain use.
gcc/ChangeLog:
* config.gcc: Modify default isa_spec version.
Jiufu Guo [Fri, 21 Jan 2022 09:03:50 +0000 (17:03 +0800)]
Update the type of control.base after changed
This patch correct the type of niter->control.base, when it is updated
as a PLUS expr.
During build PLUS expr, the result type should align with the type of
the operands.
PR tree-optimization/102087
gcc/ChangeLog:
* tree-ssa-loop-niter.cc (number_of_iterations_until_wrap):
Correct PLUS result type.
gcc/testsuite/ChangeLog:
* gcc.dg/pr102087_1.c: New test.
LiaoShihua [Wed, 19 Jan 2022 09:15:25 +0000 (17:15 +0800)]
RISC-V: Update testcases info with new implement info
After commit
591b6e00d1bfe12932ca31530d5859f95db8a35a " riscv: fix -Wformat-diag errors ", some strings in implement was changed.
This patch update the check info in testcases to sync with it.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/arch-9.c: Update the check info.
* gcc.target/riscv/arch-10.c: Ditto.
* gcc.target/riscv/arch-12.c: Ditto.
David Edelsohn [Sat, 22 Jan 2022 23:25:06 +0000 (18:25 -0500)]
testsuite: Ignore pr104159 psabi warning.
gcc/testsuite/ChangeLog:
* gcc.dg/analyzer/torture/pr104159.c: Ignore psabi warning.
H.J. Lu [Sat, 22 Jan 2022 20:04:30 +0000 (12:04 -0800)]
x86: Also check mode of memory broadcast in bcst_mem_operand
Return false for invalid mode on memory broadcast in bcst_mem_operand:
(vec_duplicate:V16SF (mem/j:V4SF (reg/v/f:DI 109 [ b ])))
gcc/
PR target/104188
* config/i386/predicates.md (bcst_mem_operand): Also check mode
of memory broadcast.
gcc/testsuite/
PR target/104188
* gcc.target/i386/pr104188.c: New test.
GCC Administrator [Mon, 24 Jan 2022 00:16:28 +0000 (00:16 +0000)]
Daily bump.
Jonathan Wakely [Sun, 23 Jan 2022 21:55:57 +0000 (21:55 +0000)]
libstdc++: Fix std::spanstream move assignment [PR104032]
libstdc++-v3/ChangeLog:
PR libstdc++/104032
* include/std/spanstream (basic_spanbuf(basic_spanbuf&&)): Use
mem-initializer for _M_buf.
(basic_spanbuf::Operator=(basic_spanbuf&&)): Fix ill-formed
member access.
* testsuite/27_io/spanstream/2.cc: New test.
Jonathan Wakely [Fri, 21 Jan 2022 15:33:13 +0000 (15:33 +0000)]
libstdc++: Use fast_float for long double if it uses binary64 format
We can use the new from_chars implementation when long double and double
have the same representation.
libstdc++-v3/ChangeLog:
* src/c++17/floating_from_chars.cc (USE_STRTOD_FOR_FROM_CHARS):
Define macro for case where std::from_chars is implemented in
terms of strtod, strtof or strtold.
(buffer_resource, valid_fmt, find_end_of_float, pattern)
(from_chars_impl, make_result, reserve_string): Do not define
unless USE_STRTOD_FOR_FROM_CHARS is defined.
(from_chars): Define when at least one of USE_LIB_FAST_FLOAT and
USE_STRTOD_FOR_FROM_CHARS is defined, instead of
_GLIBCXX_HAVE_USELOCALE. Use fast_float for long double when it
is binary64.
Jonathan Wakely [Sat, 22 Jan 2022 00:35:45 +0000 (00:35 +0000)]
libstdc++: Restore support for unordered_map<const T, ...> [PR104174]
I broke this unintentionally in r12-4259.
libstdc++-v3/ChangeLog:
PR libstdc++/104174
* include/bits/hashtable_policy.h (_Map_base): Add partial
specialization for maps with const key types.
* testsuite/23_containers/unordered_map/104174.cc: New test.
Jonathan Wakely [Fri, 21 Jan 2022 12:08:20 +0000 (12:08 +0000)]
libstdc++: Fix aliasing violation in std::shared_ptr [PR104019]
The non-atomic store that sets both reference counts to zero uses a
type-punned pointer, which has undefined behaviour. We could use memset
to write 8 bytes, but we don't actually need it to be a single store
anyway. No other thread can observe the values, that's why it's safe to
use non-atomic stores in the first place. So we can just set each count
to zero.
With -fstore-merging (which is enabled by default at -O2) GCC produces
the same code for this as for memset or the type punned store. Clang
does that store merging even at -O1.
libstdc++-v3/ChangeLog:
PR libstdc++/104019
* include/bits/shared_ptr_base.h (_Sp_counted_base<>::_M_release):
Set members to zero without type punning.
Will Wray [Sat, 15 Jan 2022 00:28:53 +0000 (19:28 -0500)]
c++: designated init of char array by string constant [PR55227]
There are two underlying bugs in the designated initialization of char array
fields by string literals that cause:
(1) Rejection of valid cases with:
(a) brace-enclosed string literal initializer (of any valid size), or
(b) unbraced string literal shorter than the target char array field.
(2) Acceptance of invalid cases with designators appearing within the braces
of a braced string literal, in which case the bogus 'designator' was
being entirely ignored and the string literal treated as a positional
initializer.
The fixes above allow to address a FIXME in cp_complete_array_type:
/* FIXME: this code is duplicated from reshape_init.
Probably we should just call reshape_init here? */
I believe that this was obstructed by the designator bugs (see comment here
https://patchwork.ozlabs.org/project/gcc/list/?series=199783)
PR c++/55227
gcc/cp/ChangeLog:
* decl.cc (reshape_init_r): Only call has_designator_check when
first_initializer_p or for the inner constructor element.
(cp_complete_array_type): Call reshape_init on braced-init-list.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/desig21.C: New test.
Andrew Pinski [Mon, 10 Jan 2022 07:39:31 +0000 (23:39 -0800)]
[aarch64/64821]: Simplify __builtin_aarch64_sqrt* into internal function .SQRT.
This is a simple patch which simplifies the __builtin_aarch64_sqrt* builtins
into the internal function SQRT which allows for constant folding and other
optimizations at the gimple level. It was originally suggested we do to
__builtin_sqrt just for __builtin_aarch64_sqrtdf when -fno-math-errno
but since r6-4969-g686ee9719a4 we have the internal function SQRT which does
the same so it makes we don't need to check -fno-math-errno either now.
Applied as approved after bootstrapped and tested on aarch64-linux-gnu with no regressions.
PR target/64821
gcc/ChangeLog:
* config/aarch64/aarch64-builtins.cc
(aarch64_general_gimple_fold_builtin): Handle
__builtin_aarch64_sqrt* and simplify into SQRT internal
function.
gcc/testsuite/ChangeLog:
* gcc.target/aarch64/vsqrt-1.c: New test.
* gcc.target/aarch64/vsqrt-2.c: New test.
Martin Liska [Sun, 23 Jan 2022 09:52:41 +0000 (10:52 +0100)]
contrib: filter out one more Clang warning.
contrib/ChangeLog:
* filter-clang-warnings.py: Filter out one another warning
for sse.md.
Jason Merrill [Sat, 22 Jan 2022 22:11:54 +0000 (17:11 -0500)]
c++: array temporary at file scope [PR104182]
This is the same issue as PR104031, but that patch doesn't fix this
testcase because in this case, current_function_decl isn't set when we get
to cp_genericize_target_expr. But there seems to be no need for
is_local_temp to check for function scope; !TREE_STATIC should be enough.
PR c++/104182
gcc/cp/ChangeLog:
* cp-gimplify.cc (cp_genericize_target_expr): Make sure nothing
has set DECL_INITIAL on a TARGET_EXPR slot.
* tree.cc (is_local_temp): Don't check DECL_CONTEXT.
gcc/testsuite/ChangeLog:
* g++.dg/cpp0x/initlist127.C: New test.
Jason Merrill [Thu, 20 Jan 2022 10:45:02 +0000 (05:45 -0500)]
c++: constexpr and -fno-elide-constructors [PR101072]
We've been trying for a while to avoid TARGET_EXPRs in template code, but
there were still a few that snuck through, and the one in this case broke
the code that tried to handle it. Fixed by using IMPLICIT_CONV_EXPR, as we
have done elsewhere.
I also noticed that finish_compound_literal was assuming that all T{init}
were for aggregate T, and we got a few more TARGET_EXPRs from that. Fixed
by only messing with TARGET_EXPR if we actually have an aggregate init.
PR c++/101072
gcc/cp/ChangeLog:
* cp-tree.h (build_implicit_conv_flags): Declare.
* call.cc (build_implicit_conv_flags): Split out from...
(perform_implicit_conversion_flags): ...here.
* decl.cc (check_initializer): Use it.
* pt.cc (tsubst_copy_and_build): Remove TARGET_EXPR handling.
* semantics.cc (finish_compound_literal): Don't treat
scalar values like CONSTRUCTORs.
gcc/testsuite/ChangeLog:
* g++.dg/cpp0x/constexpr-empty14a.C: New test.
GCC Administrator [Sun, 23 Jan 2022 00:16:24 +0000 (00:16 +0000)]
Daily bump.
Jakub Jelinek [Sat, 22 Jan 2022 18:04:41 +0000 (19:04 +0100)]
ootstrap: Fix bootstrap with --disable-plugin [PR104176]
With --disable-plugin, bootstrap fails on x86_64-linux or probably
all other targets with:
../../gcc/opts-global.cc: In function ‘void handle_common_deferred_options()’:
../../gcc/opts-global.cc:420:62: error: unquoted option name ‘--enable-plugin’ in format [-Werror=format-diag]
420 | error ("plugin support is disabled; configure with --enable-plugin");
| ^~~~~~~~~~~~~~~
../../gcc/opts-global.cc:428:62: error: unquoted option name ‘--enable-plugin’ in format [-Werror=format-diag]
428 | error ("plugin support is disabled; configure with --enable-plugin");
| ^~~~~~~~~~~~~~~
The following patch fixes that.
2022-01-22 Jakub Jelinek <jakub@redhat.com>
PR other/104176
* opts-global.cc (handle_common_deferred_options): Quote
--enable-plugin in diagnostics to avoid -Werror=format-diag.
David Malcolm [Fri, 21 Jan 2022 21:50:11 +0000 (16:50 -0500)]
testsuite: guard usage of _Float16 in analyzer test [PR104150]
gcc/testsuite/ChangeLog:
PR analyzer/104150
* gcc.dg/analyzer/pr104089.c: Add "dg-add-options float16"
and "dg-require-effective-target float16" directives.
Signed-off-by: David Malcolm <dmalcolm@redhat.com>
David Malcolm [Fri, 21 Jan 2022 14:56:56 +0000 (09:56 -0500)]
analyzer: fix ICE on vector casts [PR104159]
PR analyzer/104159 describes an ICE attempting to convert a vector_cst,
which occurs when symbolically executing within a recursive call on:
_4 = BIT_FIELD_REF <w_3(D), 32, 0>;
_1 = VIEW_CONVERT_EXPR<T>(_4);
where the BIT_FIELD_REF leads to a get_or_create_cast from
VEC<long, 8> to VEC<unsigned 4>
which get_code_for_cast erroneously picks NOP_EXPR for the cast, leading
to a bogus input to the VIEW_CONVERT_EXPR.
This patch fixes the issue by giving up on attempts to cast symbolic
values of vector types, treating the result of such casts as unknowable.
gcc/analyzer/ChangeLog:
PR analyzer/104159
* region-model-manager.cc
(region_model_manager::get_or_create_cast): Bail out if the types
are the same. Don't attempt to handle casts involving vector
types.
gcc/testsuite/ChangeLog:
PR analyzer/104159
* gcc.dg/analyzer/torture/pr104159.c: New test.
Signed-off-by: David Malcolm <dmalcolm@redhat.com>
Harald Anlauf [Thu, 20 Jan 2022 21:36:50 +0000 (22:36 +0100)]
Fortran: fix simplification of TRANSFER for zero-sized character array result
gcc/fortran/ChangeLog:
PR fortran/104127
* simplify.cc (gfc_simplify_transfer): Ensure that the result
typespec is set up for TRANSFER with MOLD of type CHARACTER
including character length even if the result is a zero-sized
array.
gcc/testsuite/ChangeLog:
PR fortran/104127
* gfortran.dg/transfer_simplify_11.f90: Fix logic.
* gfortran.dg/transfer_simplify_13.f90: New test.
Jakub Jelinek [Sat, 22 Jan 2022 11:03:14 +0000 (12:03 +0100)]
toplevel: Remove accedentally checked in file
This has been added in r12-6342-ge7a7dbb5ca5dd69689f1a probably
by accident.
2022-01-22 Jakub Jelinek <jakub@redhat.com>
PR other/104181
* build.log: Remove.
Michael Meissner [Sat, 22 Jan 2022 02:36:18 +0000 (21:36 -0500)]
Fix fold-vec-splat-floatdouble testsuite failure on power10
When I added support for generating XXSPLTIDP on December 15th, 2021, I
missed updating the fold-vec-splat-floatdouble.c test to add to the regex
for the instructions generated. This patch fixes that.
2022-01-20 Michael Meissner <meissner@the-meissners.org>
gcc/testsuite/
PR testsuite/103763
* gcc.target/powerpc/fold-vec-splat-floatdouble.c: Fix insn regex
on power10.
GCC Administrator [Sat, 22 Jan 2022 00:16:26 +0000 (00:16 +0000)]
Daily bump.
Michael Meissner [Fri, 21 Jan 2022 23:08:50 +0000 (18:08 -0500)]
Mark XXSPLTIW/XXSPLTIDP as prefixed -- PR 104136
If you compile module_advect_em.F90 with -Ofast -mcpu=power10, one module
is large enough that we can't use a single conditional jump to span the
function. Instead, GCC has to reverse the condition, and do a conditional
jump around an unconditional branch. It turns out when xxspltiw and
xxspltdp instructions were generated, they were not marked as being
prefixed (i.e. length of 12 bytes instead of 4 bytes). This meant the
calculations for the branch length were off, which in turn meant the
assembler raised an error because it couldn't do the conditional jump.
The fix is to explicitly set the prefixed attribute when we are loading up
vector constants with the xxspltiw or xxspltidp instructions.
I have removed the code that sets the prefixed attribute for xxspltiw,
xxspltidp, and xxsplti32dx instructions, since it no longer will be invoked.
I have also explicitly set the prefixed attribute for load SF and DF mode
constants with xxsplitw and xxspltidp. Previously, it was not set on these
insns, but when the insn was split to get the XXSPLTIW/XXSPLTIDP forms, those
forms already had the prefixed attribute set.
2022-01-21 Michael Meissner <meissner@the-meissners.org>
gcc/
PR target/104136
* config/rs6000/rs6000-protos.h (prefixed_xxsplti_p): Delete.
* config/rs6000/rs6000.cc (prefixed_xxsplti_p): Delete.
* config/rs6000/rs6000.md (prefixed attribute): Delete section
that sets the prefixed attribute for xxspltiw, xxspltidp, and
xxsplti32dx instructions.
(movsf_hardfloat): Explicitly set the prefixed attribute
when xxspltiw and xxspltidp instructions are generated.
(mov<mode>_hardfloat32): Likewise.
(mov<mode>_hardfloat64): Likewise.
* config/rs6000/vsx.md (vsx_mov<mode>_64bit): Explicitly set the
prefixed attribute for xxspltiw and xxspltidp instructions.
(vsx_mov<mode>_32bit): Likewise.
H.J. Lu [Fri, 21 Jan 2022 21:24:00 +0000 (13:24 -0800)]
x86: Properly disable -fsplit-stack support on non-glibc targets
Revert x86 changes in
commit
c163647ffbc9a20c8feb6e079dbecccfe016c82e
Author: Soren Tempel <soeren@soeren-tempel.net>
Date: Fri Jan 21 19:22:46 2022 +0000
Disable -fsplit-stack support on non-glibc targets
and change ix86_supports_split_stack to return true only on glibc.
PR bootstrap/104170
* common/config/i386/i386-common.cc (ix86_supports_split_stack):
Return true only on glibc.
* config/i386/gnu-user-common.h (STACK_CHECK_STATIC_BUILTIN):
Revert commit
c163647ffbc.
* config/i386/gnu.h (TARGET_LIBC_PROVIDES_SSP): Likewise.
Jakub Jelinek [Fri, 21 Jan 2022 21:44:53 +0000 (22:44 +0100)]
c-family: Fix up a -Wformat regression [PR104148]
As can be seen on the testcase, GCC 11 no longer warns if the format
string is wrapped inside of ()s.
This regressed with r11-2457-gdf5cf47a978, which added
if (TREE_NO_WARNING (param)) return;
to check_function_arguments_recurse. That function is used with a callback
for two cases, for -Wformat and for -Wnonnull. For the latter it is
desirable to not warn in parameters or their subexpressions where that
warning is suppressed, but for -Wformat the function is used solely
to discover the string literals if any so that the c-format.cc code can
diagnose them. I believe no warning suppression should stand in the
way of that, -Wformat* warnings should be decided from warning suppression
on the CALL_EXPR only.
In the PR Martin argued that now that we have specialized
warning_suppressed_p we should use it, so instead of adding a bool
arg to check_function_arguments_recurse I've added opt_code to the
function, but will defer the warning_suppressed_p change to him.
For OPT_Wformat_ we don't want to call it anyway at all (as I said,
I think there should be no suppression for it during the string discovery,
there isn't just one -Wformat= option, there are many and
warning_suppression_p even with no_warnings actually tests the
TREE_NO_WARNING bit).
Initially, I thought I'd restrict also call to fn with format_arg attribute
handling in check_function_arguments_recurse to OPT_Wformat_ only, but
after looking around, it perhaps is intentional that way, most functions
with format_arg attribute don't have nonnull attribute for that arg too,
various gettext implementations handle NULL argument by passing it through,
but when result of gettext (NULL) etc. is passed to non-NULL argument, it
makes sense to warn.
2022-01-21 Jakub Jelinek <jakub@redhat.com>
PR c++/104148
* c-common.h (check_function_arguments_recurse): Add for_format
arg.
* c-common.cc (check_function_nonnull): Pass false to
check_function_arguments_recurse's last argument.
(check_function_arguments_recurse): Add for_format argument,
if true, don't stop on warning_suppressed_p.
* c-format.cc (check_format_info): Pass true to
check_function_arguments_recurse's last argument.
* c-c++-common/Wformat-pr104148.c: New test.
Jason Merrill [Fri, 21 Jan 2022 16:03:26 +0000 (11:03 -0500)]
c++: explain failing static_assert
While looking at another bug I wanted the compiler to tell me what the two
unequal values were.
gcc/cp/ChangeLog:
* semantics.cc (find_failing_clause): Return expr if not
decomposable.
(finish_static_assert): Show constant values in failing
comparison.
gcc/testsuite/ChangeLog:
* g++.dg/template/explicit-args6.C: Add expected message.
Jason Merrill [Fri, 21 Jan 2022 17:49:03 +0000 (12:49 -0500)]
c++: class array new checking [PR104084]
My patch for PR20040 made us stop exiting early from build_new_1 in
cases of trivial initialization if there's a class operator delete; as a
result, code later in the function needs to handle this case properly.
PR c++/104084
PR c++/20040
gcc/cp/ChangeLog:
* init.cc (build_new_1): Only pull out TARGET_EXPR_INITIAL if
alloc_expr is a TARGET_EXPR.
gcc/testsuite/ChangeLog:
* g++.dg/init/new50.C: New test.
Sören Tempel [Fri, 21 Jan 2022 19:22:46 +0000 (19:22 +0000)]
Disable -fsplit-stack support on non-glibc targets
The -fsplit-stack option requires the pthread_t TCB definition in the
libc to provide certain struct fields at specific hardcoded offsets. As
far as I know, only glibc provides these fields at the required offsets.
Most notably, musl libc does not have these fields. However, since gcc
accesses the fields using a fixed offset, this does not cause a
compile-time error, but instead results in a silent memory corruption at
run-time with musl libc. For example, on s390x libgcc's
__stack_split_initialize CTOR will overwrite the cancel field in the
pthread_t TCB on musl.
The -fsplit-stack option is used within the gcc code base itself by
gcc-go (if available). On musl-based systems with split-stack support
(i.e. s390x or x86) this causes Go programs compiled with gcc-go to
misbehave at run-time.
This patch fixes gcc-go on musl by disabling -fsplit-stack in gcc itself
since it is not supported on non-glibc targets anyhow. This is achieved
by checking if gcc targets a glibc-based system. This check has been
added for x86 and s390x, the rs6000 config already checks for
TARGET_GLIBC_MAJOR. Other architectures do not have split-stack
support. With this patch applied, the gcc-go configure script will
detect that -fsplit-stack support is not available and will not use it.
See https://www.openwall.com/lists/musl/2012/10/16/12
This patch was written under the assumption that glibc is the only libc
implementation which supports the required fields at the required
offsets in the pthread_t TCB. The patch has been tested on Alpine Linux
Edge on the s390x and x86 architectures by bootstrapping Google's Go
implementation with gcc-go.
Signed-off-by: Sören Tempel <soeren@soeren-tempel.net>
gcc/ChangeLog:
* common/config/s390/s390-common.cc (s390_supports_split_stack):
Only support split-stack on glibc targets.
* config/i386/gnu-user-common.h (STACK_CHECK_STATIC_BUILTIN): Ditto.
* config/i386/gnu.h (defined): Ditto.
Bill Schmidt [Fri, 21 Jan 2022 19:13:11 +0000 (13:13 -0600)]
rs6000: Support vector float/double for vec_sldw
2022-01-21 Bill Schmidt <wschmidt@linux.ibm.com>
gcc/
* config/rs6000/rs6000-overload.def (VEC_SLDW): Add instances for
vector float and vector double.
gcc/testsuite/
* gcc.target/powerpc/builtins-4.c: Add two test variants. Adjust
assembler counts.
Bill Seurer [Fri, 21 Jan 2022 19:04:38 +0000 (13:04 -0600)]
rs6000: Fix bootstrap
Fix a compilation issue in stage2 bootstrap. Fixed as obvious (re:
discussion with Bill Schmidt).
2022-01-21 Bill Seurer <seurer@gcc.gnu.org>
gcc/
* config/rs6000/rs6000.cc (rs6000_get_function_versions_dispatcher):
Fix mention of ifunc in string.
Roger Sayle [Fri, 21 Jan 2022 18:42:30 +0000 (18:42 +0000)]
PR middle-end/104140: bootstrap ICE on riscv.
This patch resolves the P1 "ice-on-valid-code" regression boostrapping
GCC on risv-unknown-linux-gnu caused by my recent MULT_HIGHPART_EXPR
functionality. RISC-V differs from x86_64 and many targets by
supporting a usmusidi3 instruction, basically a widening multiply
where one operand is signed and the other is unsigned. Alas the
final version of my patch to recognize MULT_HIGHPART_EXPR didn't
sufficiently defend against the operands of WIDEN_MULT_EXPR having
different signedness. This is fixed by the two-line change to
tree-ssa-math-opts.cc's convert_mult_to_highpart in the patch below.
The majority of the rest of the patch is to the documentation
(in tree.def and generic.texi). It turns out that WIDEN_MULT_EXPR
wasn't previously documented in generic.texi, let alone the slightly
unusual semantics of allowing mismatched (signed vs unsigned) operands.
This also clarifies that MULT_HIGHPART_EXPR currently requires the
signedness of operands to match [but this might change in a future
release of GCC to support targets with usmul<mode>3_highpart].
The one final chunk of this patch (that is hopefully sufficiently
close to obvious for stage 4) is a similar (NULL pointer) sanity
check in riscv_cpu_cpp_builtins. Currently running cc1 from the
command line (or from gdb) without specifying -march results in a
segmentation fault (ICE). This is a minor annoyance tracking down
issues (in cross compilers) for riscv, and trivially fixed as below.
2022-01-22 Roger Sayle <roger@nextmovesoftware.com>
gcc/ChangeLog
PR middle-end/104140
* tree-ssa-math-opts.cc (convert_mult_to_highpart): Check that the
operands of the widening multiplication are either both signed or
both unsigned, and abort the conversion if mismatched.
* doc/generic.texi (WIDEN_MULT_EXPR): Describe expression node.
(MULT_HIGHPART_EXPR): Clarify that operands must have the same
signedness.
* tree.def (MULT_HIGHPART_EXPR): Document both operands must have
integer types with the same precision and signedness.
(WIDEN_MULT_EXPR): Document that operands must have integer types
with the same precision, but possibly differing signedness.
* config/riscv/riscv-c.cc (riscv_cpu_cpp_builtins): Defend against
riscv_current_subset_list returning a NULL pointer (empty list).
gcc/testsuite/ChangeLog
PR middle-end/104140
* gcc.target/riscv/pr104140.c: New test case.
Vladimir N. Makarov [Fri, 21 Jan 2022 18:34:32 +0000 (13:34 -0500)]
[PR103676] LRA: Calculate and exclude some start hard registers for reload pseudos
LRA and old reload pass uses only one register class for reload pseudos even if
operand constraints contain more one register class. Let us consider
constraint 'lh' for thumb arm which means low and high thumb registers.
Reload pseudo for such constraint will have general reg class (union of
low and high reg classes). Assigning the last low register to the reload
pseudo is wrong if the pseudo is of DImode as it requires two hard regs.
But it is considered OK if we use general reg class. The following patch
solves this problem for LRA.
gcc/ChangeLog:
PR target/103676
* ira.h (struct target_ira): Add member
x_ira_exclude_class_mode_regs.
(ira_exclude_class_mode_regs): New macro.
* lra.h (lra_create_new_reg): Add arg exclude_start_hard_regs and
move from here ...
* lra-int.h: ... to here.
(lra_create_new_reg_with_unique_value): Add arg
exclude_start_hard_regs.
(class lra_reg): Add member exclude_start_hard_regs.
* lra-assigns.cc (find_hard_regno_for_1): Setup
impossible_start_hard_regs from exclude_start_hard_regs.
* lra-constraints.cc (get_reload_reg): Add arg exclude_start_hard_regs and pass
it lra_create_new_reg[_with_unique_value].
(match_reload): Ditto.
(check_and_process_move): Pass NULL
exclude_start_hard_regs to lra_create_new_reg_with_unique_value.
(goal_alt_exclude_start_hard_regs): New static variable.
(process_addr_reg, simplify_operand_subreg): Pass NULL
exclude_start_hard_regs to lra_create_new_reg_with_unique_value
and get_reload_reg.
(process_alt_operands): Setup goal_alt_exclude_start_hard_regs.
Use this_alternative_exclude_start_hard_regs additionally to find
winning operand alternative.
(base_to_reg, base_plus_disp_to_reg, index_part_to_reg): Pass NULL
exclude_start_hard_regs to lra_create_new_reg.
(process_address_1, emit_inc): Ditto.
(curr_insn_transform): Pass exclude_start_hard_regs value to
lra_create_new_reg, get_reload_reg, match_reload.
(inherit_reload_reg, split_reg): Pass NULL exclude_start_hard_regs
to lra_create_new_reg.
(process_invariant_for_inheritance): Ditto.
* lra-remat.cc (update_scratch_ops): Ditto.
* lra.cc (lra_create_new_reg_with_unique_value): Add arg
exclude_start_hard_regs. Setup the corresponding member of
lra reg info.
(lra_create_new_reg): Add arg exclude_start_hard_regs and pass it
to lra_create_new_reg_with_unique_value.
(initialize_lra_reg_info_element): Initialize member
exclude_start_hard_regs.
(get_scratch_reg): Pass NULL to lra_create_new_reg.
* ira.cc (setup_prohibited_class_mode_regs): Rename to
setup_prohibited_and_exclude_class_mode_regs and calculate
ira_exclude_class_mode_regs.
gcc/testsuite/ChangeLog:
PR target/103676
* g++.target/arm/pr103676.C: New.
Marek Polacek [Fri, 14 Jan 2022 22:41:49 +0000 (17:41 -0500)]
c++: ICE with noexcept and canonical types [PR101715]
This is a "canonical types differ for identical types" ICE, which started
with r11-4682. It's a bit tricky to explain. Consider:
template <typename T> struct S {
S<T> bar() noexcept(T::value); // #1
S<T> foo() noexcept(T::value); // #2
};
template <typename T> S<T> S<T>::foo() noexcept(T::value) {} // #3
We ICE because #3 and #2 have the same type, but their canonical types
differ: TYPE_CANONICAL (#3) == #2 but TYPE_CANONICAL (#2) == #1.
The member functions #1 and #2 have the same type. However, since their
noexcept-specifier is deferred, when parsing them, we create a variant for
both of them, because DEFERRED_PARSE cannot be compared. In other words,
build_cp_fntype_variant's
tree v = TYPE_MAIN_VARIANT (type);
for (; v; v = TYPE_NEXT_VARIANT (v))
if (cp_check_qualified_type (v, type, type_quals, rqual, raises, late))
return v;
will *not* find an existing variant when creating a method_type for #2, so we
have to create a new one.
But then we perform delayed parsing and call fixup_deferred_exception_variants
for #1 and #2. f_d_e_v will replace TYPE_RAISES_EXCEPTIONS with the newly
parsed noexcept-specifier. It also sets TYPE_CANONICAL (#2) to #1. Both
noexcepts turned out to be the same, so now we have two equivalent variants in
the list! I.e.,
+-----------------+ +-----------------+ +-----------------+
| main | | #2 | | #1 |
| S S::<T379>(S*) |----->| S S::<T37c>(S*) |----->| S S::<T37a>(S*) |----->NULL
| - | | noex(T::value) | | noex(T::value) |
+-----------------+ +-----------------+ +-----------------+
Then we get to #3. As for #1 and #2, grokdeclarator calls build_memfn_type,
which ends up calling build_cp_fntype_variant, which will use the loop
above to look for an existing variant. The first one that matches
cp_check_qualified_type will be used, so we use #2 rather than #1, and the
TYPE_CANONICAL mismatch follows. Hopefully that makes sense.
As for the fix, I didn't think I could rewrite the method_type #2 with #1
because the type may have escaped via decltype. So my approach is to
elide #2 from the list, so when looking for a matching variant, we always
find #1 (#2 remains live though, which admittedly sounds sort of dodgy).
PR c++/101715
gcc/cp/ChangeLog:
* tree.cc (fixup_deferred_exception_variants): Remove duplicate
variants after parsing the exception specifications.
gcc/testsuite/ChangeLog:
* g++.dg/cpp0x/noexcept72.C: New test.
* g++.dg/cpp0x/noexcept73.C: New test.
Thomas Schwinge [Fri, 21 Jan 2022 11:48:28 +0000 (12:48 +0100)]
Strengthen a few OpenACC test cases
Rather than rubber-stamp whatever requested vs. actual device kernel launch
configuration happens, actually (again) verify the requested values (modulo
expected variations).
This better highlights that "AMD GCN has an upper limit of 'num_workers(16)'",
and the deficiency that "AMD GCN uses the autovectorizer for the vector
dimension: the use of a function call in vector-partitioned code [...] is not
currently supported".
And, this removes several instances of race conditions, where variables are
concurrently written to in OpenACC gang-redundant mode.
libgomp/
* testsuite/libgomp.oacc-c-c++-common/loop-gwv-1.c: Strengthen.
* testsuite/libgomp.oacc-c-c++-common/loop-gwv-2.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/loop-red-gwv-1.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/loop-red-v-1.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/loop-red-v-2.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/loop-red-w-1.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/loop-red-w-2.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/loop-red-wv-1.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/loop-v-1.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/loop-w-1.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/loop-wv-1.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/routine-gwv-1.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/routine-v-1.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/routine-w-1.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/routine-wv-1.c: Likewise.
Jason Merrill [Fri, 21 Jan 2022 16:16:49 +0000 (11:16 -0500)]
c++: [[no_unique_address]] and virtual base [PR104139]
Fixing a thinko in my patch for 103681: when computing the size of a virtual
base, it would help to use its binfo instead of the one for the derived
class.
PR c++/104139
PR c++/103681
gcc/cp/ChangeLog:
* class.cc (end_of_class): Use base_binfo.
gcc/testsuite/ChangeLog:
* g++.dg/abi/no_unique_address2.C: Adjust to detect this on x86-64.
Jonathan Wakely [Fri, 21 Jan 2022 15:00:49 +0000 (15:00 +0000)]
libstdc++: Fix typo in comment
libstdc++-v3/ChangeLog:
* testsuite/20_util/shared_ptr/cons/array.cc: Fix comment.
Jonathan Wakely [Fri, 21 Jan 2022 14:22:23 +0000 (14:22 +0000)]
libstdc++: Ensure all feature test macros have type long [PR87193]
This defines all the __cpp_lib_xxx macros as type long, as required by
the standard. We had an inconsistent mix of int and long, sometimes even
for the same macro name.
The __cpp_lib_experimental_xxx macros are left as type int, because
that's what it says in the relevant TS specs.
libstdc++-v3/ChangeLog:
PR libstdc++/87193
PR libstdc++/104019
* include/bits/alloc_traits.h (__cpp_lib_allocator_traits_is_always_equal):
Define as type long.
* include/bits/allocator.h (__cpp_lib_incomplete_container_elements):
Likewise.
* include/bits/basic_string.h (__cpp_lib_string_udls): Likewise.
* include/bits/chrono.h (__cpp_lib_chrono): Likewise.
(__cpp_lib_chrono_udls): Likewise.
* include/bits/move.h (__cpp_lib_addressof_constexpr): Likewise.
* include/bits/node_handle.h (__cpp_lib_node_extract): Likewise.
* include/bits/range_access.h (__cpp_lib_nonmember_container_access):
Likewise.
* include/bits/shared_ptr.h (__cpp_lib_enable_shared_from_this):
Likewise.
* include/bits/stl_algo.h (__cpp_lib_clamp): Likewise.
(__cpp_lib_sample): Likewise.
* include/bits/stl_algobase.h (__cpp_lib_robust_nonmodifying_seq_ops):
Likewise.
* include/bits/stl_function.h (__cpp_lib_transparent_operators):
Likewise.
* include/bits/stl_iterator.h (__cpp_lib_make_reverse_iterator):
Likewise.
* include/bits/stl_map.h (__cpp_lib_map_try_emplace):
Likewise.
* include/bits/stl_tree.h (__cpp_lib_generic_associative_lookup):
Likewise.
* include/bits/unique_ptr.h (__cpp_lib_make_unique):
Likewise.
* include/bits/unordered_map.h (__cpp_lib_unordered_map_try_emplace):
Likewise.
* include/c_global/cmath (__cpp_lib_hypot): Likewise.
* include/c_global/cstddef (__cpp_lib_byte): Likewise.
* include/std/atomic (__cpp_lib_atomic_is_always_lock_free):
Likewise.
* include/std/complex (__cpp_lib_complex_udls): Likewise.
* include/std/filesystem (__cpp_lib_filesystem): Likewise.
* include/std/functional (__cpp_lib_not_fn): Likewise.
(__cpp_lib_boyer_moore_searcher): Likewise.
* include/std/iomanip (__cpp_lib_quoted_string_io): Likewise.
* include/std/mutex (__cpp_lib_scoped_lock): Likewise.
* include/std/numeric (__cpp_lib_gcd_lcm): Likewise.
(__cpp_lib_gcd, __cpp_lib_lcm): Likewise.
* include/std/tuple (__cpp_lib_apply): Likewise.
(__cpp_lib_make_from_tuple): Likewise.
* include/std/type_traits (__cpp_lib_integral_constant_callable)
(__cpp_lib_bool_constant, __cpp_lib_logical_traits)
(__cpp_lib_is_null_pointer, __cpp_lib_transformation_trait_aliases)
(__cpp_lib_result_of_sfinae, __cpp_lib_void_t)
(__cpp_lib_is_swappable, __cpp_lib_is_invocable)
(__cpp_lib_has_unique_object_representations)
(__cpp_lib_is_aggregate): Likewise.
* include/std/version: Likewise.
* libsupc++/new (__cpp_lib_launder): Likewise.
Jonathan Wakely [Fri, 21 Jan 2022 14:56:08 +0000 (14:56 +0000)]
libstdc++: Fix condition for __cpp_lib_shared_ptr_arrays
I changed the preprocessor condition from <= to < in r12-6574 which
meant the macro was not defined by <version> for C++17.
libstdc++-v3/ChangeLog:
* include/std/version (__cpp_lib_shared_ptr_arrays): Fix
condition for C++17 definition.
Martin Liska [Fri, 21 Jan 2022 13:52:55 +0000 (14:52 +0100)]
Enable configure detection of ld.mold.
gcc/ChangeLog:
* configure.ac: Detect ld_is_mold and use it for
comdat_group=yes and gcc_cv_ld_hidden=yes.
* configure: Regenerate.
Richard Biener [Fri, 21 Jan 2022 12:29:06 +0000 (13:29 +0100)]
tree-optimization/100089 - BB vectorization of if-converted loop bodies
The PR complains that when we only partially BB vectorize an
if-converted loop body that this can leave unvectorized code
unconditionally executed and thus effectively slow down code.
For -O2 we already mitigated the issue by not doing BB vectorization
when not all if-converted stmts were covered but the issue is
present with -O3 as well. Thus the following simply extends the
fix to cover all but the unlimited cost models. It is after all
very likely that we vectorize some stmts, if only a single
paired store.
2022-01-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/100089
* tree-vect-slp.cc (vect_slp_region): Reject BB vectorization
of if-converted loops with unvectorized COND_EXPRs for
all but the unlimited cost models.
Jonathan Wakely [Fri, 21 Jan 2022 11:55:22 +0000 (11:55 +0000)]
libstdc++: Fix constexpr constructor for atomic<shared_ptr<T>>
libstdc++-v3/ChangeLog:
* include/bits/shared_ptr_atomic.h (_Sp_atomic::_Atomic_count):
Add constexpr.
(_Sp_atomic::_M_ptr): Add default member-initializer.
* testsuite/20_util/shared_ptr/atomic/atomic_shared_ptr.cc:
Check constant initialization.
* testsuite/20_util/weak_ptr/atomic_weak_ptr.cc: Likewise.
Richard Biener [Fri, 21 Jan 2022 12:57:12 +0000 (13:57 +0100)]
sanitizer/99673 - bad -Wstringop-overread diagnostic with asan
The testcase got fixed by lowering of &MEM[ptr + CST] to ptr + CST.
2022-01-21 Richard Biener <rguenther@suse.de>
PR sanitizer/99673
* gcc.dg/asan/pr99673.c: New testcase.
Ard Biesheuvel [Fri, 21 Jan 2022 12:09:34 +0000 (12:09 +0000)]
[ARM] Add support for TLS register based stack protector canary access
Add support for accessing the stack canary value via the TLS register,
so that multiple threads running in the same address space can use
distinct canary values. This is intended for the Linux kernel running in
SMP mode, where processes entering the kernel are essentially threads
running the same program concurrently: using a global variable for the
canary in that context is problematic because it can never be rotated,
and so the OS is forced to use the same value as long as it remains up.
Using the TLS register to index the stack canary helps with this, as it
allows each CPU to context switch the TLS register along with the rest
of the process, permitting each process to use its own value for the
stack canary.
gcc/ChangeLog:
* config/arm/arm-opts.h (enum stack_protector_guard): New.
* config/arm/arm-protos.h (arm_stack_protect_tls_canary_mem):
New.
* config/arm/arm.cc (TARGET_STACK_PROTECT_GUARD): Define.
(arm_option_override_internal): Handle and put in error checks.
for stack protector guard options.
(arm_option_reconfigure_globals): Likewise.
(arm_stack_protect_tls_canary_mem): New.
(arm_stack_protect_guard): New.
* config/arm/arm.md (stack_protect_set): New.
(stack_protect_set_tls): Likewise.
(stack_protect_test): Likewise.
(stack_protect_test_tls): Likewise.
(reload_tp_hard): Likewise.
* config/arm/arm.opt (-mstack-protector-guard): New
(-mstack-protector-guard-offset): New.
* doc/invoke.texi: Document new options.
gcc/testsuite/ChangeLog:
* gcc.target/arm/stack-protector-7.c: New test.
* gcc.target/arm/stack-protector-8.c: New test.
Richard Earnshaw [Fri, 21 Jan 2022 11:29:40 +0000 (11:29 +0000)]
aarch64: Adjust spellcheck tests for recent quotation-mark changes
Adjust tests for quotation-mark and punctuation changes.
gcc/testsuite:
* gcc.target/aarch64/spellcheck_1.c: Adjust tests for new output.
* gcc.target/aarch64/spellcheck_2.c: Likewise.
* gcc.target/aarch64/spellcheck_3.c: Likewise.
* gcc.target/aarch64/spellcheck_7.c: Likewise.
Richard Biener [Fri, 21 Jan 2022 09:19:58 +0000 (10:19 +0100)]
tree-optimization/104156 - fix unswitching compare-debug issue
When hoisting guards the unswitching pass does not properly ignore
debug stmts when looking for uses outside of the loop of defs
produced in the skipped region. The following rectifies this
by instead collecting them and resetting them after the transform.
2022-01-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/104156
* tree-ssa-loop-unswitch.cc (tree_unswitch_outer_loop):
Collect and reset debug stmts with out-of-loop uses when
hoisting guards.
(find_loop_guard): Adjust.
(empty_bb_without_guard_p): Likewise. Ignore debug stmts.
(used_outside_loop_p): Push debug uses to a vector of
debug stmts to reset.
(hoist_guard): Adjust -fopt-info category.
* gcc.dg/loop-unswitch-6.c: New testcase.