As the testcase shows, calling cp_build_bit_cast in tsubst_copy doesn't seem
to be a good idea, because tsubst_copy might not really make the operand
non-dependent, but as processing_template_decl can be 0,
type_dependent_expression_p will return false and then cp_build_bit_cast
assumes the type is non-NULL and non-dependent.
So, this patch just follows what is done e.g. for NOP_EXPR etc. and just
builds some tree in tsubst_copy, and only calls the semantics.c function
from tsubst_copy_and_build.
2021-01-07 Jakub Jelinek <jakub@redhat.com>
PR c++/98329
* pt.c (tsubst_copy) <case BIT_CAST_EXPR>: Don't call
cp_build_bit_cast here, instead just build_min a BIT_CAST_EXPR and set
its location.
(tsubst_copy_and_build): Handle BIT_CAST_EXPR.
* g++.dg/cpp2a/bit-cast10.C: New test.
This fixes a thinko in my r11-2085 patch: when I said "But only give the
!late_return_type errors when funcdecl_p, to accept e.g. auto (*fp)() = f;
in C++11" I should've done this, otherwise we give bogus errors mentioning
"function with trailing return type" when there is none.
gcc/cp/ChangeLog:
PR c++/98441
* decl.c (grokdeclarator): Move the !funcdecl_p check inside the
!late_return_type block.
gcc/testsuite/ChangeLog:
PR c++/98441
* g++.dg/cpp0x/auto55.C: New test.
Discussing the 98469 patch and class prvalues with Jakub led me to
double-check our handling of TARGET_EXPR in constexpr.c, and add a note
about why we don't strip them in parameter initialization. And another to
clarify that we're handling an INIT_EXPR in a place we do strip them.
gcc/cp/ChangeLog:
* constexpr.c (cxx_bind_parameters_in_call): Add comment.
(cxx_eval_store_expression): Add comment.
Another change I was working on revealed that for complex numbers we were
building a ck_identity with build_conv, leading to the wrong active member
in the union being set. Rather than add another enumeration of the
appropriate conversion codes, I factored that out.
gcc/cp/ChangeLog:
* call.c (has_next): Factor out from...
(next_conversion): ...here.
(strip_standard_conversion): And here.
(is_subseq): And here.
(build_conv): Check it.
(standard_conversion): Don't call build_conv
for ck_identity.
lto-streamer-out.c's get_symbol_initial_value can return error_mark_node
rather than DECL_INITIAL as an optimization to avoid extra sections for
simple scalar values.
Add a check to the analyzer to handle such cases gracefully.
gcc/analyzer/ChangeLog:
PR analyzer/98580
* region.cc (decl_region::get_svalue_for_initializer): Gracefully
handle when LTO writes out DECL_INITIAL as error_mark_node.
gcc/testsuite/ChangeLog:
PR analyzer/98580
* gcc.dg/analyzer/pr98580-a.c: New test.
* gcc.dg/analyzer/pr98580-b.c: New test.
The testcase was failing to compile on some targets due to its use of
the non-standard functions nextupl and nextdownl. This patch makes the
testcase instead use the C99 function nexttowardl in an equivalent way.
libstdc++-v3/ChangeLog:
PR libstdc++/98384
* testsuite/20_util/to_chars/long_double.cc: Use nexttowardl
instead of the non-standard nextupl and nextdownl.
2021-01-07 Paul Thomas <pault@gcc.gnu.org>
gcc/fortran
PR fortran/93701
* resolve.c (find_array_spec): Put static prototype for
resolve_assoc_var before this function and call for associate
variables.
gcc/testsuite/
PR fortran/93701
* gfortran.dg/associate_54.f90: New test.
* gfortran.dg/associate_55.f90: New test.
* gfortran.dg/associate_56.f90: New test.
Adds support for using user-defined attributes on function arguments and
single-parameter alias declarations. These attributes behave analogous
to existing UDAs.
gcc/d/ChangeLog:
* dmd/MERGE: Merge upstream dmd 9038e64c5.
* d-builtins.cc (build_frontend_type): Update call to
Parameter::create.
We do not tolerate "growing" a vector to a lower size.
2021-01-07 Richard Biener <rguenther@suse.de>
gcc/c/
* gimple-parser.c (c_parser_gimple_compound_statement): Only
reallocate loop array if it is too small.
The BLSI instruction sets SF and ZF based on the result and clears OF.
CF is set to something unrelated.
The following patch optimizes BLSI followed by comparison, so we don't need
to emit a TEST insn in between.
2021-01-07 Jakub Jelinek <jakub@redhat.com>
PR target/98567
* config/i386/i386.md (*bmi_blsi_<mode>_cmp, *bmi_blsi_<mode>_ccno):
New define_insn patterns.
* gcc.target/i386/pr98567-1.c: New test.
* gcc.target/i386/pr98567-2.c: New test.
This patch extends the conditional unary integer operations
from SVE_FULL_I to SVE_I. In each case the type suffix is
taken from the element size rather than the container size:
this matters for ABS and NEG, but doesn't matter for NOT.
gcc/
* config/aarch64/aarch64-sve.md (@cond_<SVE_INT_UNARY:optab><mode>)
(*cond_<SVE_INT_UNARY:optab><mode>_2): Extend from SVE_FULL_I to SVE_I.
(*cond_<SVE_INT_UNARY:optab><mode>_any): Likewise.
gcc/testsuite/
* gcc.target/aarch64/sve/cond_unary_5.c: New test.
* gcc.target/aarch64/sve/cond_unary_5_run.c: Likewise.
* gcc.target/aarch64/sve/cond_unary_6.c: Likewise.
* gcc.target/aarch64/sve/cond_unary_6_run.c: Likewise.
* gcc.target/aarch64/sve/cond_unary_7.c: Likewise.
* gcc.target/aarch64/sve/cond_unary_7_run.c: Likewise.
* gcc.target/aarch64/sve/cond_unary_8.c: Likewise.
* gcc.target/aarch64/sve/cond_unary_8_run.c: Likewise.
This patch follows on from the previous one for the PR and
makes sure that we can handle == as well as <. Previously
we assumed without checking that IFN_VCONDEQ was available
if IFN_VCOND or IFN_VCONDU wasn't.
The patch also fixes the definition of the IFN_VCOND* functions.
The optabs are convert optabs in which the first mode is the
data mode and the second mode is the comparison or mask mode.
gcc/
PR tree-optimization/98560
* internal-fn.def (IFN_VCONDU, IFN_VCONDEQ): Use type vec_cond.
* internal-fn.c (vec_cond_mask_direct): Get the data mode from
argument 1.
(vec_cond_direct): Likewise argument 2.
(vec_condu_direct, vec_condeq_direct): Delete.
(expand_vect_cond_optab_fn): Rename to...
(expand_vec_cond_optab_fn): ...this, replacing old macro.
(expand_vec_condu_optab_fn, expand_vec_condeq_optab_fn): Delete.
(expand_vect_cond_mask_optab_fn): Rename to...
(expand_vec_cond_mask_optab_fn): ...this, replacing old macro.
(direct_vec_cond_mask_optab_supported_p): Treat the optab as a
convert optab.
(direct_vec_cond_optab_supported_p): Likewise.
(direct_vec_condu_optab_supported_p): Delete.
(direct_vec_condeq_optab_supported_p): Delete.
* gimple-isel.cc: Include internal-fn.h.
(gimple_expand_vec_cond_expr): Check that IFN_VCONDEQ is supported
before using it.
gcc/testsuite/
PR tree-optimization/98560
* gcc.dg/vect/pr98560-2.c: New test.
PR98560 is about a case in which the vectoriser initially generates:
mask_1 = a < 0;
mask_2 = mask_1 & ...;
res = VEC_COND_EXPR <mask_2, b, c>;
The vectoriser thus expects res to be calculated using vcond_mask.
However, we later manage to fold mask_2 to mask_1, leaving:
mask_1 = a < 0;
res = VEC_COND_EXPR <mask_1, b, c>;
gimple-isel then required a combined vcond to exist.
On most targets, it's not too onerous to provide all possible
(compare x select) combinations. For each data mode, you just
need to provide unsigned comparisons, signed comparisons, and
floating-point comparisons, with the data mode and type of
comparison uniquely determining the mode of the compared values.
But for targets like SVE that support “unpacked” vectors,
it's not that simple: the level of unpacking adds another
degree of freedom.
Rather than insist that the combined versions exist, I think
we should be prepared to fall back to using separate comparisons
and vcond_masks. I think that makes more sense on targets like
AArch64 and AArch32 in which compares and selects are fundementally
separate operations anyway.
gcc/
PR tree-optimization/98560
* gimple-isel.cc (gimple_expand_vec_cond_expr): If we fail to use
IFN_VCOND{,U,EQ}, fall back on IFN_VCOND_MASK.
gcc/testsuite/
PR tree-optimization/98560
* gcc.dg/vect/pr98560-1.c: New test.
As the testcase shows, bswap can match even byte-swapping or indentity
from low part of some wider SSA_NAME.
For bswap replacement other than for vector CONSTRUCTOR the code has been
using NOP_EXPR casts if the types weren't compatible, but for vectors
we need to use VIEW_CONVERT_EXPR. The problem with the latter is that
we require that it has the same size, which isn't guaranteed, so this patch
in those cases first adds a narrowing NOP_EXPR cast and only afterwards
does a VIEW_CONVERT_EXPR.
2021-01-07 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/98568
* gimple-ssa-store-merging.c (bswap_view_convert): New function.
(bswap_replace): Use it.
* g++.dg/torture/pr98568.C: New test.
gcc/testsuite/ChangeLog:
* gcc.target/i386/pr92658-avx512bw.c: Add
-mprefer-vector-width=512 to avoid impact of different default
mtune which gcc is built with.
* gcc.target/i386/pr92658-avx512bw-2.c: Ditto.
gcc/analyzer/ChangeLog:
PR analyzer/97074
* store.cc (binding_cluster::can_merge_p): Add "out_store" param
and pass to calls to binding_cluster::make_unknown_relative_to.
(binding_cluster::make_unknown_relative_to): Add "out_store"
param. Use it to mark base regions that are pointed to by
pointers that become unknown as having escaped.
(store::can_merge_p): Pass out_store to
binding_cluster::can_merge_p.
* store.h (binding_cluster::can_merge_p): Add "out_store" param.
(binding_cluster::make_unknown_relative_to): Likewise.
* svalue.cc (region_svalue::implicitly_live_p): New vfunc.
* svalue.h (region_svalue::implicitly_live_p): New vfunc decl.
gcc/testsuite/ChangeLog:
PR analyzer/97074
* gcc.dg/analyzer/pr97074.c: New test.
This pulls in the toplevel portions of these binutils-gdb commits:
1ff6de031241c59d0ff bfd, ld: add CTF section linking
87279e3cef5b2c54f4a libctf: installable libctf as a shared library
c59e30ed1727135f8ef libctf: new testsuite
* Makefile.def: Sync with binutils-gdb:
(dependencies): all-ld depends on all-libctf.
(host_modules): libctf is no longer no_install.
No longer no_check. Checking depends on all-ld.
* Makefile.in: Regenerated.
LRA can crash when a hard register was split and the same hard register
was assigned on the previous assignment sub-pass. The following
patch fixes this problem.
gcc/ChangeLog:
PR rtl-optimization/97978
* lra-int.h (lra_hard_reg_split_p): New external.
* lra.c (lra_hard_reg_split_p): New global.
(lra): Set up lra_hard_reg_split_p after splitting a hard reg.
* lra-assigns.c (lra_assign): Don't check allocation correctness
after hard reg splitting.
gcc/testsuite/ChangeLog:
PR rtl-optimization/97978
* gcc.target/i386/pr97978.c: New.
Where possible (i.e. where that doesn't alter the intent of a test) we
use a suspend_always as the final suspend and a test that the coroutine
was 'done' to check that the state machine had terminated correctly.
Sometimes, filed PRs have 'suspend_never' as the final suspend expression
and that needs to be changed to match the testsuite style. This is one
I missed and means that the call to 'done()' on the handle is made to an
already-destructed coroutine. Surprisngly, thAt didn't actually trigger
a failure until glibc 2-32.
Fixed by changing the final suspend to be 'suspend_always'.
gcc/testsuite/ChangeLog:
PR c++/96504
* g++.dg/coroutines/torture/pr95519-05-gro.C: Use suspend_always
as the final suspend point so that we can check that the state
machine has reached the expected point.
The error recovery after an invalid reference to an undefined CLASS
during a TYPE declaration lead to an invalid access. Add a check.
gcc/fortran/ChangeLog:
* resolve.c (resolve_component): Add check for valid CLASS
reference before trying to access CLASS data.
C++ sized deallocation only came in C++14, so this test wasn't
working properly in C++11, which isn't tested by default. Fixed
thus by constraining the dg-errors to C++14 only.
gcc/testsuite/ChangeLog:
PR testsuite/98566
* g++.dg/warn/Wmismatched-dealloc.C: Use target c++14 in
dg-error.
2021-01-06 John David Anglin <danglin@gcc.gnu.org>
libcody/ChangeLog:
PR bootstrap/98506
* resolver.cc: Only use fstatat when _POSIX_C_SOURCE >= 200809L.
In g++.dg/opt/store-merging-2.C, the natural alignment of types T and
S is a single byte, so we shouldn't expect store merging on
strict-alignment platforms. Indeed, without something like the
adjust-alignment pass to bump up the alignment of the automatic
variable, as in GCC 10, the optimization does not occur.
This patch adjusts the test so that the required alignment is
expressly stated, and so we don't rely on its accidentally being there
to get the desired optimization.
for gcc/testsuite/ChangeLog
* g++.dg/opt/store-merging-2.C: Add the required alignment.
The glimits.h overriding used in gcc/config/t-vxworks was fragile: the
intermediate file would already be there in a rebuild, and so the
adjustments would not be made, so the generated limits.h would miss
them, causing limits-width-[12] tests to fail on that target.
While changing it, I also replaced the modern $(cmd) shell syntax with
the more portable `cmd` construct.
for gcc/ChangeLog
* Makefile.in (T_GLIMITS_H): New.
(stmp-int-hdrs): Depend on it, use it.
* config/t-vxworks (T_GLIMITS_H): Override it.
(vxw-glimits.h): New.
This adds __attribute__((signed_bool_precision(precision))) to be able
to construct nonstandard boolean types which for the included testcase
is needed to simulate Ada and LTO interaction (Ada uses a 8 bit
precision boolean_type_node). This will also be useful for vector
unit testcases where we need to produce vector types with
non-standard precision signed boolean type components.
2021-01-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/95582
gcc/c-family/
* c-attribs.c (c_common_attribute_table): Add entry for
signed_bool_precision.
(handle_signed_bool_precision_attribute): New.
gcc/testsuite/
* gcc.dg/pr95582.c: New testcase.
This fixes a premature optimization in the range intersection code
which assumes earlier branches have to be taken, not taking into
account that for symbolic ranges we cannot always compare endpoints.
The fix is to instantiate the compare deemed redundant (which then
fails as undecidable for the testcase).
2021-01-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/98513
* value-range.cc (intersect_ranges): Compare the upper bounds
for the expected relation.
* gcc.dg/tree-ssa/pr98513.c: New testcase.
contrib/ChangeLog:
* gcc-changelog/git_commit.py: Add decode_path function.
* gcc-changelog/git_email.py: Use it in order to solve
utf8 encoding filename issues.
* gcc-changelog/git_repository.py: Likewise.
* gcc-changelog/test_email.py: Test it.
gcc/analyzer/ChangeLog:
PR analyzer/97072
* region-model-reachability.cc (reachable_regions::init_cluster):
Convert symbolic region handling to a switch statement. Add cases
to handle SK_UNKNOWN and SK_CONJURED.
gcc/testsuite/ChangeLog:
PR analyzer/97072
* gcc.dg/analyzer/pr97072.c: New test.
This ICE was fixed by r11-2694-g808f4dfeb3a95f50 (aka the big state
rewrite for GCC 11).
gcc/testsuite/ChangeLog:
PR analyzer/98073
* gcc.dg/analyzer/pr98073.c: New test.
The bogus leak message went away after
fcae512115 (aka "Hybrid EVRP and
testcases") due to that patch improving a phi node in the gimple input
to the analyzer.
gcc/testsuite/ChangeLog:
PR analyzer/98223
* gcc.dg/analyzer/pr94851-1.c: Remove xfail.
The HSAIL web server has reappeared after weeks, so restore the standard
reference for now while we consider further deprecation.
This reverts commit 7e999bd84f.
gcc/
2021-01-06 Gerald Pfeifer <gerald@pfeifer.com>
Revert:
2020-12-28 Gerald Pfeifer <gerald@pfeifer.com>
* doc/standards.texi (HSAIL): Remove section.
Commit 2f473f4b06 ("IBM Z: Do not run long double tests on old
machines") introduced a predicate for tests that must run only on z14+.
However, due to a syntax error, the predicate always returns false.
gcc/testsuite/ChangeLog:
2020-12-10 Ilya Leoshkevich <iii@linux.ibm.com>
* gcc.target/s390/s390.exp: Replace %% with %.
We don't use them, since we always call the C library functions which do
the right thing anyhow. And they aren't defined on all GNU/Linux variants.
Fixes PR go/98510
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/281473
Some files were missing from the libgo copy of internal/cpu, because they
used to only declare CacheLinePadSize which libgo gets from goarch.sh.
Now they also declare doinit, so copy them over. Adjust cpu_other.go.
Fix the amd64p32 build by adding a build constraint to cpu_no_name.go.
Fixes PR go/98493
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/281472
Jonathan mentioned on IRC that ISO/IEC 14882:2020 has been published
yesterday (and indeed it appears on www.iso.org for sale).
I think we should reflect that in our documentation and in cxx-status.html,
patches attached.
I understand we want to keep C++20 support experimental even in GCC 11,
though not sure if we should still talk about "almost certainly change in
incompatible ways" rather than that it might change in incompatible ways.
2021-01-05 Jakub Jelinek <jakub@redhat.com>
* doc/invoke.texi (-std=c++20): Adjust for the publication of
ISO 14882:2020 standard.
* doc/standards.texi: Likewise.
Adds the following new `__traits' to the D language.
- isDeprecated: used to detect if a function is deprecated.
- isDisabled: used to detect if a function is marked with @disable.
- isFuture: used to detect if a function is marked with @__future.
- isModule: used to detect if a given symbol represents a module, this
enhancement also adds support using `is(sym == module)'.
- isPackage: used to detect if a given symbol represents a package,
this enhancement also adds support using `is(sym == package)'.
- child: takes two arguments. The first must be a symbol or expression
and the second must be a symbol, such as an alias to a member of the
first 'parent' argument. The result is the second 'member' argument
interpreted with its 'this' context set to 'parent'. This is the
inverse of `__traits(parent, member)'.
- isReturnOnStack: determines if a function's return value is placed on
the stack, or is returned via registers.
- isZeroInit: used to detect if a type's default initializer has no
non-zero bits.
- getTargetInfo: used to query features of the target being compiled
for, the back-end can expand this to register any key to handle the
given argument, however a reliable subset exists which includes
"cppRuntimeLibrary", "cppStd", "floatAbi", and "objectFormat".
- getLocation: returns a tuple whose entries correspond to the
filename, line number, and column number of where the argument was
declared.
- hasPostblit: used to detect if a type is a struct with a postblit.
- isCopyable: used to detect if a type allows copying its value.
- getVisibility: an alias for the getProtection trait.
Reviewed-on: https://github.com/dlang/dmd/pull/12093
gcc/d/ChangeLog:
* dmd/MERGE: Merge upstream dmd a5c86f5b9.
* d-builtins.cc (d_eval_constant_expression): Handle ADDR_EXPR trees
created by build_string_literal.
* d-frontend.cc (retStyle): Remove function.
* d-target.cc (d_language_target_info): New variable.
(d_target_info_table): Likewise.
(Target::_init): Initialize d_target_info_table.
(Target::isReturnOnStack): New function.
(d_add_target_info_handlers): Likewise.
(d_handle_target_cpp_std): Likewise.
(d_handle_target_cpp_runtime_library): Likewise.
(Target::getTargetInfo): Likewise.
* d-target.h (struct d_target_info_spec): New type.
(d_add_target_info_handlers): Declare.
GCC Administrator
Jakub Jelinek
Martin Sebor
Marek Polacek
Jason Merrill
Thomas Rodgers
David Malcolm
Ian Lance Taylor
Joseph Myers
Patrick Palka
Paul Thomas
Iain Buclaw
Richard Biener
Richard Sandiford
Uros Bizjak
Hongyu Wang
Nick Alcock
Vladimir N. Makarov
Iain Sandoe
Harald Anlauf
John David Anglin
Alexandre Oliva
Martin Liska
Gerald Pfeifer
Samuel Thibault
Ilya Leoshkevich
Steve Kargl
Ed Smith-Rowland