Thomas Schwinge [Mon, 7 Jun 2021 14:17:06 +0000 (16:17 +0200)]
Revert PR80547 workaround in 'libgomp.oacc-c-c++-common/parallel-dims.c'
This problem has been fixed long ago, in r267934 (commit
d41d952c9bbdffe6fd2badc9c4f2c18d241ce412) "[nvptx] Handle assignment to
gang-level reduction variable".
libgomp/
* testsuite/libgomp.oacc-c-c++-common/parallel-dims.c: Revert
PR80547 workaround.
Thomas Schwinge [Sat, 5 Jun 2021 20:01:48 +0000 (22:01 +0200)]
[nvptx] Update comment in 'libgomp.oacc-c-c++-common/parallel-dims.c'
Small fix-up for r267889 (commit
2b9d9e393766d2fa6e2dd5f361d0db14872cf261)
"[nvptx] Enable large vectors":
> * testsuite/libgomp.oacc-c-c++-common/parallel-dims.c: Expect vector
> length 2097152 to be reduced to 1024 instead of 32.
libgomp/
* testsuite/libgomp.oacc-c-c++-common/parallel-dims.c
<acc_device_nvidia>: Update comment.
Richard Biener [Mon, 7 Jun 2021 18:08:13 +0000 (20:08 +0200)]
middle-end/100951 - make sure to generate VECTOR_CST in lowering
When vector lowering creates piecewise ops make sure to create
VECTOR_CSTs instead of CONSTRUCTORs when possible.
gcc/
2021-06-07 Richard Biener <rguenther@suse.de>
PR middle-end/100951
* tree-vect-generic.c (expand_vector_piecewise): Build a
VECTOR_CST if all elements are constant.
(expand_vector_condition): Likewise.
(lower_vec_perm): Likewise.
(expand_vector_conversion): Likewise.
gcc/testsuite/
2021-06-07 H.J. Lu <hjl.tools@gmail.com>
PR middle-end/100951
* gcc.target/i386/pr100951.c: New test.
Jakub Jelinek [Tue, 8 Jun 2021 08:06:13 +0000 (10:06 +0200)]
testsuite: Add -Wno-psabi -w to pr100887.c test [PR100943]
On x86 the test is using -mavx512f and so never reports the various
-Wpsabi notes/warnings, but on other targets it can.
2021-06-08 Jakub Jelinek <jakub@redhat.com>
PR target/100887
PR testsuite/100943
* gcc.dg/pr100887.c: Add -Wno-psabi -w to dg-options.
Tobias Burnus [Tue, 8 Jun 2021 07:51:09 +0000 (09:51 +0200)]
Fortran/OpenMP: Fix clause splitting for target/parallel/teams [PR99928]
PR middle-end/99928
gcc/fortran/ChangeLog:
* trans-openmp.c (gfc_add_clause_implicitly): New.
(gfc_split_omp_clauses): Use it.
(gfc_free_split_omp_clauses): New.
(gfc_trans_omp_do_simd, gfc_trans_omp_parallel_do,
gfc_trans_omp_parallel_do_simd, gfc_trans_omp_distribute,
gfc_trans_omp_teams, gfc_trans_omp_target, gfc_trans_omp_taskloop,
gfc_trans_omp_master_taskloop, gfc_trans_omp_parallel_master): Use it.
gcc/testsuite/ChangeLog:
* gfortran.dg/gomp/openmp-simd-6.f90: Update scan-tree-dump.
* gfortran.dg/gomp/scan-5.f90: Likewise.
* gfortran.dg/gomp/loop-1.f90: Likewise; remove xfail.
* gfortran.dg/gomp/pr99928-1.f90: Remove xfail.
* gfortran.dg/gomp/pr99928-2.f90: Likewise.
* gfortran.dg/gomp/pr99928-3.f90: Likewise.
* gfortran.dg/gomp/pr99928-8.f90: Likewise.
Martin Liska [Tue, 8 Jun 2021 07:45:40 +0000 (09:45 +0200)]
docs: document evrp-sparse-threshold param
gcc/ChangeLog:
* doc/invoke.texi: Document new param evrp-sparse-threshold.
Martin Liska [Tue, 8 Jun 2021 07:42:18 +0000 (09:42 +0200)]
Fix "tailing" typo.
gcc/fortran/ChangeLog:
* intrinsic.texi: Fix typo.
* trans-expr.c (gfc_trans_pointer_assignment): Likewise.
gcc/ChangeLog:
* genautomata.c (create_automata): Fix typo.
libgfortran/ChangeLog:
* intrinsics/chmod.c (chmod_internal): Fix typo.
* io/transfer.c (read_sf): Likewise.
libquadmath/ChangeLog:
* libquadmath.texi: Fix typo.
gcc/testsuite/ChangeLog:
* gcc.dg/format/strfmon-1.c: Fix typo.
* gfortran.dg/char4-subscript.f90: Likewise.
Kewen Lin [Tue, 8 Jun 2021 03:10:33 +0000 (22:10 -0500)]
predcom: Enabled by loop vect at O2 [PR100794]
As PR100794 shows, in the current implementation PRE bypasses
some optimization to avoid introducing loop carried dependence
which stops loop vectorizer to vectorize the loop. At -O2,
there is no downstream pass to re-catch this kind of opportunity
if loop vectorizer fails to vectorize that loop.
This patch follows Richi's suggestion in the PR, if predcom flag
isn't set and loop vectorization will enable predcom without any
unrolling implicitly. The Power9 SPEC2017 evaluation showed it
can speed up 521.wrf_r 3.30% and 554.roms_r 1.08% at very-cheap
cost model, no remarkable impact at cheap cost model, the build
time and size impact is fine (see the PR for the details).
By the way, I tested another proposal to guard PRE not skip the
optimization for cheap and very-cheap vect cost models, the
evaluation results showed it's fine with very cheap cost model,
but it can degrade some bmks like 521.wrf_r -9.17% and
549.fotonik3d_r -2.07% etc.
Bootstrapped/regtested on powerpc64le-linux-gnu P9,
x86_64-redhat-linux and aarch64-linux-gnu.
gcc/ChangeLog:
PR tree-optimization/100794
* tree-predcom.c (tree_predictive_commoning_loop): Add parameter
allow_unroll_p and only allow unrolling when it's true.
(tree_predictive_commoning): Add parameter allow_unroll_p and
adjust for it.
(run_tree_predictive_commoning): Likewise.
(pass_predcom::gate): Check flag_tree_loop_vectorize and
global_options_set.x_flag_predictive_commoning.
(pass_predcom::execute): Adjust for allow_unroll_p.
gcc/testsuite/ChangeLog:
PR tree-optimization/100794
* gcc.dg/tree-ssa/pr100794.c: New test.
Kewen Lin [Tue, 8 Jun 2021 03:10:03 +0000 (22:10 -0500)]
predcom: Adjust some unnecessary update_ssa calls
As Richi suggested in PR100794, this patch is to remove
some unnecessary update_ssa calls with flag
TODO_update_ssa_only_virtuals, also do some refactoring.
Bootstrapped/regtested on powerpc64le-linux-gnu P9,
x86_64-redhat-linux and aarch64-linux-gnu, built well
on Power9 ppc64le with --with-build-config=bootstrap-O3,
and passed both P8 and P9 SPEC2017 full build with
{-O3, -Ofast} + {,-funroll-loops}.
gcc/ChangeLog:
* tree-predcom.c (execute_pred_commoning): Remove update_ssa call.
(tree_predictive_commoning_loop): Factor some cleanup stuffs into
lambda function cleanup, remove scev_reset call, and adjust return
value.
(tree_predictive_commoning): Adjust for different changed values,
only set flag TODO_update_ssa_only_virtuals if changed.
(pass_data pass_data_predcom): Remove TODO_update_ssa_only_virtuals
from todo_flags_finish.
Jason Merrill [Fri, 16 Apr 2021 17:52:02 +0000 (13:52 -0400)]
c++: preserve BASELINK from lookup [PR91706]
In the earlier patch for PR91706 I fixed the BASELINK built by
baselink_for_fns, but since we already had one from lookup, we should keep
that one around instead of stripping it. The removed hunk in
get_class_binding was a wierdly large amount of code to decide whether to
pull out BASELINK_FUNCTIONS.
gcc/cp/ChangeLog:
PR c++/91706
* name-lookup.c (get_class_binding): Keep a BASELINK.
(set_inherited_value_binding_p): Adjust.
* lambda.c (is_lambda_ignored_entity): Adjust.
* pt.c (lookup_template_function): Copy a BASELINK before
modifying it.
Jason Merrill [Fri, 16 Apr 2021 15:13:40 +0000 (11:13 -0400)]
c++: alias with same name as base fn [PR91706]
This is a bit complex. Looking up c<T> in the definition of D::c finds
C::c, OK. Looking up c in the definition of E finds D::c, OK. Since the
alias is not dependent, we strip it from the template argument, leaving
using E = A<decltype(c<T>())>;
where 'c' still refers to C::c. But instantiating E looks up 'c' again and
finds D::c, which isn't a function, and sadness ensues.
I think the bug here is looking up 'c' in D at instantiation time; the
declaration we found before is not dependent. This seems to happen because
baselink_for_fns gets BASELINK_BINFO wrong; it is supposed to be the base
where lookup found the functions, C in this case.
gcc/cp/ChangeLog:
PR c++/91706
* semantics.c (baselink_for_fns): Fix BASELINK_BINFO.
gcc/testsuite/ChangeLog:
PR c++/91706
* g++.dg/template/lookup17.C: New test.
Jason Merrill [Mon, 7 Jun 2021 21:51:24 +0000 (17:51 -0400)]
c++: fix modules binfo merging
My coming fix for PR91706 caused some regressions in the modules testsuite.
This turned out to be because the change to properly use the base subobject
BINFO as BASELINK_BINFO hit problems with the code for merging binfos. The
tree reader needed a typo fix. The duplicate_hash function was crashing on
the BINFO for a variadic base in <variant>. I started fixing the hash
function, but then noticed that there's no ::equal function defined;
duplicate_hash just uses pointer equality, so we might as well also
use the normal pointer hash for the moment.
gcc/cp/ChangeLog:
* module.cc (duplicate_hash::hash): Comment out.
(trees_in::tree_value): Adjust loop counter.
Jason Merrill [Mon, 31 May 2021 16:56:34 +0000 (12:56 -0400)]
c++: alias member template [PR100102]
Patrick already fixed the primary cause of this bug. But while I was
looking at this testcase I noticed that with the qualified name k::o we
ended up with a plain FUNCTION_DECL, whereas without the k:: we got a
BASELINK. There seems to be no good reason not to return the BASELINK
in this case as well.
PR c++/100102
gcc/cp/ChangeLog:
* init.c (build_offset_ref): Return the BASELINK for a static
member function.
gcc/testsuite/ChangeLog:
* g++.dg/cpp0x/alias-decl-73.C: New test.
GCC Administrator [Tue, 8 Jun 2021 00:16:44 +0000 (00:16 +0000)]
Daily bump.
Andrew MacLeod [Mon, 7 Jun 2021 17:18:55 +0000 (13:18 -0400)]
Implement a sparse bitmap representation for Rangers on-entry cache.
Use a sparse representation for the on entry cache, and utilize it when
the number of basic blocks in the function exceeds param_evrp_sparse_threshold.
PR tree-optimization/PR100299
* gimple-range-cache.cc (class sbr_sparse_bitmap): New.
(sbr_sparse_bitmap::sbr_sparse_bitmap): New.
(sbr_sparse_bitmap::bitmap_set_quad): New.
(sbr_sparse_bitmap::bitmap_get_quad): New.
(sbr_sparse_bitmap::set_bb_range): New.
(sbr_sparse_bitmap::get_bb_range): New.
(sbr_sparse_bitmap::bb_range_p): New.
(block_range_cache::block_range_cache): initialize bitmap obstack.
(block_range_cache::~block_range_cache): Destruct obstack.
(block_range_cache::set_bb_range): Decide when to utilze the
sparse on entry cache.
* gimple-range-cache.h (block_range_cache): Add bitmap obstack.
* params.opt (-param=evrp-sparse-threshold): New.
Andrew MacLeod [Mon, 7 Jun 2021 17:12:01 +0000 (13:12 -0400)]
Implement multi-bit aligned accessors for sparse bitmap.
Provide set/get routines to allow sparse bitmaps to be treated as an array
of multiple bit values. Only chunk sizes that are powers of 2 are supported.
* bitmap.c (bitmap_set_aligned_chunk): New.
(bitmap_get_aligned_chunk): New.
(test_aligned_chunk): New.
(bitmap_c_tests): Call test_aligned_chunk.
* bitmap.h (bitmap_set_aligned_chunk, bitmap_get_aligned_chunk): New.
Uros Bizjak [Mon, 7 Jun 2021 20:58:15 +0000 (22:58 +0200)]
i386: Add init pattern for V4QI vectors [PR100637]
2021-06-07 Uroš Bizjak <ubizjak@gmail.com>
gcc/
PR target/100637
* config/i386/i386-expand.c (ix86_expand_vector_init_duplicate):
Handle V4QI mode.
(ix86_expand_vector_init_one_nonzero): Ditto.
(ix86_expand_vector_init_one_var): Ditto.
(ix86_expand_vector_init_general): Ditto.
* config/i386/mmx.md (vec_initv4qiqi): New expander.
gcc/testsuite/
PR target/100637
* gcc.target/i386/pr100637-5b.c: New test.
* gcc.target/i386/pr100637-5w.c: Ditto.
H.J. Lu [Mon, 7 Jun 2021 18:43:25 +0000 (11:43 -0700)]
x86: Don't compile pr82735-[345].c for x32
Since -mabi=ms isn't compatible with x32, skip pr82735-[345].c for x32.
PR target/82735
* gcc.target/i386/pr82735-3.c: Don't compile for x32.
* gcc.target/i386/pr82735-4.c: Likewise.
* gcc.target/i386/pr82735-5.c: Likewise.
Eric Botcazou [Mon, 7 Jun 2021 16:17:31 +0000 (18:17 +0200)]
Fix old thinko in warning on pointer for storage order purposes
gcc/c
PR c/100920
* c-typeck.c (convert_for_assignment): Test fndecl_built_in_p to
spot built-in functions.
gcc/testsuite/
* gcc.dg/sso-14.c: Adjust.
Patrick Palka [Mon, 7 Jun 2021 16:02:08 +0000 (12:02 -0400)]
c++: access of dtor named by qualified template-id [PR100918]
Here, when resolving the destructor named by Inner<int>::~Inner<int>
(which is valid until C++20) we end up in cp_parser_lookup_name called
indirectly from cp_parser_template_id to look up the name Inner from
the scope Inner<int>. The lookup naturally finds the injected-class-name,
and because the flag is_template is true, we adjust this lookup result
to the TEMPLATE_DECL Inner. We then check access of this adjusted
lookup result. But this access check fails because the lookup scope is
Inner<int> and the context_for_name_lookup for the TEMPLATE_DECL is
Outer (whereas for the injected-class-name it's also Inner<int>).
The simplest fix seems to be to check access of the original lookup
result (the injected-class-name) instead of the adjusted result (the
TEMPLATE_DECL). So this patch moves the access check in
cp_parser_lookup_name to before the injected-class-name adjustment.
PR c++/100918
gcc/cp/ChangeLog:
* parser.c (cp_parser_lookup_name): Check access of the lookup
result before we potentially adjust an injected-class-name to
its TEMPLATE_DECL.
gcc/testsuite/ChangeLog:
* g++.dg/template/access38.C: New test.
Avi Kivity [Mon, 7 Jun 2021 15:19:05 +0000 (11:19 -0400)]
libstdc++: add missing typename for dependent type in ranges::elements_view [PR100900]
Clang complains about the missing typename. I believe it's not required
in a more complete implementation of C++, but it's nicer to support
less complete implementations.
PR libstdc++/100900
libstdc++-v3/ChangeLog:
* include/std/ranges (elements_view::__iter_cat::_S_iter_cat):
Add missing typename.
H.J. Lu [Mon, 7 Jun 2021 14:29:31 +0000 (07:29 -0700)]
x86: Update g++.target/i386/pr100885.C
Since long is 32 bits for x32, update g++.target/i386/pr100885.C to cast
__m64 to long long for x32.
PR target/100885
* g++.target/i386/pr100885.C (_mm_set_epi64): Cast __m64 to long
long.
Jonathan Wakely [Mon, 7 Jun 2021 12:02:15 +0000 (13:02 +0100)]
libstdc++: Constrain three-way comparison for std::optional [PR 98842]
The operator<=>(const optional<T>&, const U&) operator is supposed to be
constrained with three_way_comparable_with<U, T> so that it can only be
used when T and U are weakly-equality-comparable and also three-way
comparable.
Adding that constrain completely breaks std::optional comparisons,
because it causes constraint recursion. To avoid that, an additional
check that U is not a specialization of std::optional is needed. That
appears to be a defect in the standard and should be reported to LWG.
Signed-off-by: Jonathan Wakely <jwakely@redhat.com>
libstdc++-v3/ChangeLog:
PR libstdc++/98842
* include/std/optional (operator<=>(const optional<T>& const U&)):
Add missing constraint and add workaround for template
recursion.
* testsuite/20_util/optional/relops/three_way.cc: Check that
type without equality comparison cannot be compared when wrapped
in std::optional.
Jeff Law [Sun, 6 Jun 2021 04:44:13 +0000 (00:44 -0400)]
Use moves to eliminate redundant test/compare instructions
gcc/
* config/h8300/movepush.md: Change most _clobber_flags
patterns to instead use <cczn> subst.
(movsi_cczn): New pattern with usable CC cases split out.
(movsi_h8sx_cczn): Likewise.
Martin Liska [Fri, 4 Jun 2021 12:28:11 +0000 (14:28 +0200)]
Reformat target.def for better parsing.
gcc/c-family/ChangeLog:
* c-target.def: Split long lines and replace them
with '\n\'.
gcc/ChangeLog:
* common/common-target.def: Split long lines and replace them
with '\n\'.
* target.def: Likewise.
* doc/tm.texi: Re-generated.
Bernd Edlinger [Fri, 28 May 2021 04:54:13 +0000 (06:54 +0200)]
For obj-c stage-final re-use the checksum from the previous stage
This silences the stage compare.
gcc/objc:
2021-06-07 Bernd Edlinger <bernd.edlinger@softing.com>
* Make-lang.in (cc1obj-checksum.c): For stage-final re-use
the checksum from the previous stage.
gcc/objcp:
2021-06-07 Bernd Edlinger <bernd.edlinger@softing.com>
* Make-lang.in (cc1objplus-checksum.c): For stage-final re-use
the checksum from the previous stage.
Jakub Jelinek [Mon, 7 Jun 2021 07:28:31 +0000 (09:28 +0200)]
fold-const: Fix up fold_read_from_vector [PR100887]
The callers of fold_read_from_vector expect that the index they pass is
an index of an element in the vector and the function does that most of the
time. But we allow CONSTRUCTORs with VECTOR_TYPE to have VECTOR_TYPE
elements and in that case every CONSTRUCTOR element represents not just one
index (with the exception of V1 vectors), but multiple.
So returning zero vector if i >= CONSTRUCTOR_NELTS or returning some
CONSTRUCTOR_ELT's value might not be what the callers expect.
Fixed by punting if the first element has vector type.
Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
In theory we could instead recurse (and assert that for CONSTRUCTORs of
vector elements we have always all elements specified like tree-cfg.c
verifies?) after adjusting the index appropriately.
2021-06-07 Jakub Jelinek <jakub@redhat.com>
PR target/100887
* fold-const.c (fold_read_from_vector): Return NULL if trying to
read from a CONSTRUCTOR with vector type elements.
* gcc.dg/pr100887.c: New test.
Jakub Jelinek [Mon, 7 Jun 2021 07:25:37 +0000 (09:25 +0200)]
tree-inline: Fix up __builtin_va_arg_pack handling [PR100898]
The following testcase ICEs, because gimple_call_arg_ptr (..., 0)
asserts that there is at least one argument, while we were using
it even if we didn't copy anything just to get a pointer from/to which
the zero arguments should be copied.
Fixed by guarding the memcpy calls. Also, the code was calling
gimple_call_num_args too many times - 5 times instead of 2, so the patch
adds two temporaries for those.
2021-06-07 Jakub Jelinek <jakub@redhat.com>
PR middle-end/100898
* tree-inline.c (copy_bb): Only use gimple_call_arg_ptr if memcpy
should copy any arguments. Don't call gimple_call_num_args
on id->call_stmt or call_stmt more than once.
* g++.dg/ext/va-arg-pack-3.C: New test.
liuhongt [Thu, 3 Jun 2021 08:38:32 +0000 (16:38 +0800)]
Fix ICE of insn does not satisfy its constraints.
evex encoding vpmovzxbx needs both AVX512BW and AVX512VL which means
constraint "Yw" should be used instead of constraint "v".
gcc/ChangeLog:
PR target/100885
* config/i386/sse.md (*sse4_1_zero_extendv8qiv8hi2_3): Refine
constraints.
(<insn>v4siv4di2): Delete constraints for define_expand.
gcc/testsuite/ChangeLog:
PR target/100885
* g++.target/i386/pr100885.C: New test.
liuhongt [Tue, 1 Jun 2021 01:09:44 +0000 (09:09 +0800)]
Fix _mm256_zeroupper by representing the instructions as call_insns in which the call has a special vzeroupper ABI.
When __builtin_ia32_vzeroupper is called explicitly, the corresponding
vzeroupper pattern does not carry any CLOBBERS or SETs before LRA,
which leads to incorrect optimization in pass_reload. In order to
solve this problem, this patch refine instructions as call_insns in
which the call has a special vzeroupper ABI.
gcc/ChangeLog:
PR target/82735
* config/i386/i386-expand.c (ix86_expand_builtin): Remove
assignment of cfun->machine->has_explicit_vzeroupper.
* config/i386/i386-features.c
(ix86_add_reg_usage_to_vzerouppers): Delete.
(ix86_add_reg_usage_to_vzeroupper): Ditto.
(rest_of_handle_insert_vzeroupper): Remove
ix86_add_reg_usage_to_vzerouppers, add df_analyze at the end
of the function.
(gate): Remove cfun->machine->has_explicit_vzeroupper.
* config/i386/i386-protos.h (ix86_expand_avx_vzeroupper):
Declared.
* config/i386/i386.c (ix86_insn_callee_abi): New function.
(ix86_initialize_callee_abi): Ditto.
(ix86_expand_avx_vzeroupper): Ditto.
(ix86_hard_regno_call_part_clobbered): Adjust for vzeroupper
ABI.
(TARGET_INSN_CALLEE_ABI): Define as ix86_insn_callee_abi.
(ix86_emit_mode_set): Call ix86_expand_avx_vzeroupper
directly.
* config/i386/i386.h (struct GTY(()) machine_function): Delete
has_explicit_vzeroupper.
* config/i386/i386.md (enum unspec): New member
UNSPEC_CALLEE_ABI.
(ABI_DEFAULT,ABI_VZEROUPPER,ABI_UNKNOWN): New
define_constants for insn callee abi index.
* config/i386/predicates.md (vzeroupper_pattern): Adjust.
* config/i386/sse.md (UNSPECV_VZEROUPPER): Deleted.
(avx_vzeroupper): Call ix86_expand_avx_vzeroupper.
(*avx_vzeroupper): Rename to ..
(avx_vzeroupper_callee_abi): .. this, and adjust pattern as
call_insn which has a special vzeroupper ABI.
(*avx_vzeroupper_1): Deleted.
gcc/testsuite/ChangeLog:
PR target/82735
* gcc.target/i386/pr82735-1.c: New test.
* gcc.target/i386/pr82735-2.c: New test.
* gcc.target/i386/pr82735-3.c: New test.
* gcc.target/i386/pr82735-4.c: New test.
* gcc.target/i386/pr82735-5.c: New test.
liuhongt [Tue, 1 Jun 2021 01:00:57 +0000 (09:00 +0800)]
CALL_INSN may not be a real function call.
Use "used" flag for CALL_INSN to indicate it's a fake call. If it's a
fake call, it won't have its own function stack.
gcc/ChangeLog
PR target/82735
* df-scan.c (df_get_call_refs): When call_insn is a fake call,
it won't use stack pointer reg.
* final.c (leaf_function_p): When call_insn is a fake call, it
won't affect caller as a leaf function.
* reg-stack.c (callee_clobbers_any_stack_reg): New.
(subst_stack_regs): When call_insn doesn't clobber any stack
reg, don't clear the arguments.
* rtl.c (shallow_copy_rtx): Don't clear flag used when orig is
a insn.
* shrink-wrap.c (requires_stack_frame_p): No need for stack
frame for a fake call.
* rtl.h (FAKE_CALL_P): New macro.
GCC Administrator [Mon, 7 Jun 2021 00:16:23 +0000 (00:16 +0000)]
Daily bump.
Eric Botcazou [Sun, 6 Jun 2021 21:54:24 +0000 (23:54 +0200)]
Reimplement LEAF_REG_REMAP macro for the SPARC
The current implementation as an array of chars is indeed a bit awkward
so this reimplements it as a function taking and returning an int.
gcc/
* config/sparc/sparc-protos.h (order_regs_for_local_alloc): Rename
to...
(sparc_order_regs_for_local_alloc): ...this.
(sparc_leaf_reg_remap): Declare.
* config/sparc/sparc.h (ADJUST_REG_ALLOC_ORDER): Adjust.
(LEAF_REG_REMAP): Reimplement as call to sparc_leaf_reg_remap.
* config/sparc/sparc.c (leaf_reg_remap): Delete.
(order_regs_for_local_alloc): Rename to...
(sparc_order_regs_for_local_alloc): ...this.
(sparc_leaf_reg_remap): New function.
(sparc_conditional_register_usage): Do not modify leaf_reg_remap.
David Edelsohn [Wed, 2 Jun 2021 17:32:45 +0000 (13:32 -0400)]
aix: Use assemble_name to output BSS section name.
The code to emit BSS CSECT needs to support user assembler name.
* config/rs6000/rs6000.c (rs6000_xcoff_asm_output_aligned_decl_common):
Use assemble_name to output BSS section name.
Uros Bizjak [Sun, 6 Jun 2021 20:07:05 +0000 (22:07 +0200)]
i386: Clean up constraints.md
No functional changes.
2021-06-06 Uroš Bizjak <ubizjak@gmail.com>
gcc/
* config/i386/constraints.md (Bs):
Remove boolean operators from match_test RTX.
(Bw): Ditto.
(L): Ditto.
(M): Use "mode" variable instead of GET_MODE (op) in match_test RTX.
(Wz): Ditto.
Jakub Jelinek [Sun, 6 Jun 2021 17:38:41 +0000 (19:38 +0200)]
openmp: Add testcase for scan directive with nested functions
> In convert_nonlocal_omp_clauses, the following clauses are
> missing: OMP_CLAUSE_AFFINITY, OMP_CLAUSE_DEVICE_TYPE,
> OMP_CLAUSE_EXCLUSIVE, OMP_CLAUSE_INCLUSIVE.
OMP_CLAUSE_{EXCLUSIVE,INCLUSIVE} isn't needed, because we don't
walk the clauses at all for GIMPLE_OMP_SCAN. It would be a bug
if we used the exclusive/inclusive operands after gimplification,
but we apparently don't do that, all we check is whether the
OMP_CLAUSE_KIND of the first clause (all should be the same) is
OMP_CLAUSE_EXCLUSIVE or OMP_CLAUSE_INCLUSIVE, nothing else.
That said, I think we should have a testcase.
2021-06-06 Jakub Jelinek <jakub@redhat.com>
* gcc.dg/gomp/scan-1.c: New test.
Jakub Jelinek [Sun, 6 Jun 2021 17:37:06 +0000 (19:37 +0200)]
openmp: Call c_omp_adjust_map_clauses even for combined target [PR100902]
When looking at in_reduction support for target, I've noticed that
c_omp_adjust_map_clauses is not called for the combined target case.
The following patch fixes it.
Unfortunately, there are other issues.
One is (also mentioned in the PR) that currently the pointer attachment
stuff seems to be clause ordering dependent (the standard says that clause
ordering on the same construct does not matter), the baz and qux cases
in the PR are rejected while when swapped it is accepted.
Note, the order of clauses in GCC really is treated as insignificant
initially and only later on the compiler can adjust the ordering (e.g. when
we sort map clauses based on what they refer to etc.) and in particular,
clauses from parsing is reverse of the order in user code, while
c_omp_split_clauses performed for combined/composite constructs typically
reverses that ordering, i.e. makes it follow the user code ordering.
And another one is I'm slightly afraid c_omp_adjust_map_clauses might
misbehave in templates, though haven't tried to verify it with testcases.
When processing_template_decl, the non-dependent clauses will be handled
usually the same as when not in a template, but dependent clauses aren't
processed or only limited processing is done there, and rest is deferred
till later. From quick skimming of c_omp_adjust_map_clauses, it seems
it might not be very happy about non-processed map clauses that might
still have the TREE_LIST representation of array sections, or might
not have finalized decls or base decls etc.
So, for this I wonder if cp_parser_omp_target (and other cp/parser.c
callers of c_omp_adjust_map_clauses) shouldn't call it only
if (!processing_template_decl) - perhaps you could add
cp_omp_adjust_map_clauses wrapper that would be
if (!processing_template_decl)
c_omp_adjust_map_clauses (...);
- and call c_omp_adjust_map_clauses from within pt.c after the clauses
are tsubsted and finish_omp_clauses is called again.
2021-06-06 Jakub Jelinek <jakub@redhat.com>
PR c/100902
* c-parser.c (c_parser_omp_target): Call c_omp_adjust_map_clauses
even when target is combined with other constructs.
* parser.c (cp_parser_omp_target): Call c_omp_adjust_map_clauses
even when target is combined with other constructs.
* c-c++-common/gomp/pr100902-1.c: New test.
Martin Liska [Sun, 6 Jun 2021 15:29:44 +0000 (17:29 +0200)]
docs: Add missing @headitem for tables.
gcc/ChangeLog:
* doc/extend.texi: Add missing @headitem.
* doc/invoke.texi: Likewise.
* doc/objc.texi: Likewise.
Martin Liska [Fri, 4 Jun 2021 11:12:02 +0000 (13:12 +0200)]
genhooks: remove dead code
gcc/ChangeLog:
* genhooks.c (emit_findices): Remove unused function.
(emit_documentation): Do not call emit_findices
and do not search for @Fcode directives.
Martin Liska [Sun, 6 Jun 2021 14:56:18 +0000 (16:56 +0200)]
docs: remove extra character.
gcc/ChangeLog:
* doc/invoke.texi: Remove extra character.
Eric Botcazou [Sun, 6 Jun 2021 09:37:45 +0000 (11:37 +0200)]
Fix thinko in new warning on type punning for storage order purposes
In C, unlike in Ada, the storage order of arrays is that of their component
type, so you need to look at it when deciding to warn. And the PR complains
about a bogus warning on the assignment of a pointer returned by alloca or
malloc, so this also fixes that.
gcc/c
PR c/100920
* c-decl.c (finish_struct): Fix thinko in previous change.
* c-typeck.c (convert_for_assignment): Do not warn on pointer
assignment and initialization for storage order purposes if the
RHS is a call to a DECL_IS_MALLOC function.
gcc/testsuite/
* gcc.dg/sso-14.c: New test.
GCC Administrator [Sun, 6 Jun 2021 00:16:22 +0000 (00:16 +0000)]
Daily bump.
John David Anglin [Sat, 5 Jun 2021 15:48:04 +0000 (15:48 +0000)]
Use libiberty snprintf and vsnprintf on hppa*-*-hpux*.
libiberty/ChangeLog:
PR target/100734
* configure.ac: Use libiberty snprintf and vsnprintf on
hppa*-*-hpux*.
* configure: Regenerate.
Jeff Law [Sat, 5 Jun 2021 13:53:31 +0000 (09:53 -0400)]
Fix maintainers-verify.sh
* MAINTAINERS: Adjust my entry in the DCO section so that it does
not trigger testsuite failures.
Kewen Lin [Fri, 28 May 2021 05:21:14 +0000 (00:21 -0500)]
sh: Update unexpected empty split condition
gcc/ChangeLog:
* config/sh/sh.md (doloop_end_split): Fix empty split condition.
Kewen Lin [Fri, 28 May 2021 05:21:18 +0000 (00:21 -0500)]
sparc: Update unexpected empty split condition
gcc/ChangeLog:
* config/sparc/sparc.md (*snedi<W:mode>_zero_vis3,
*neg_snedi<W:mode>_zero_subxc, *plus_snedi<W:mode>_zero,
*plus_plus_snedi<W:mode>_zero, *minus_snedi<W:mode>_zero,
*minus_minus_snedi<W:mode>_zero): Fix empty split condition.
Kewen Lin [Fri, 28 May 2021 05:21:11 +0000 (00:21 -0500)]
or1k: Update unexpected empty split condition
gcc/ChangeLog:
* config/or1k/or1k.md (*movdi): Fix empty split condition.
Kewen Lin [Fri, 28 May 2021 05:21:07 +0000 (00:21 -0500)]
mips: Update unexpected empty split condition
gcc/ChangeLog:
* config/mips/mips.md (<anonymous>, bswapsi2, bswapdi2): Fix empty
split condition.
Kewen Lin [Fri, 28 May 2021 05:21:04 +0000 (00:21 -0500)]
m68k: Update unexpected empty split condition
gcc/ChangeLog:
* config/m68k/m68k.md (*zero_extend_inc, *zero_extend_dec,
*zero_extendsidi2): Fix empty split condition.
José Rui Faustino de Sousa [Sat, 5 Jun 2021 11:12:50 +0000 (11:12 +0000)]
Fortran: Fix some issues with pointers to character.
gcc/fortran/ChangeLog:
PR fortran/100120
PR fortran/100816
PR fortran/100818
PR fortran/100819
PR fortran/100821
* trans-array.c (gfc_get_array_span): rework the way character
array "span" was calculated.
(gfc_conv_expr_descriptor): improve handling of character sections
and unlimited polymorphic objects.
* trans-expr.c (gfc_get_character_len): new function to calculate
character string length.
(gfc_get_character_len_in_bytes): new function to calculate
character string length in bytes.
(gfc_conv_scalar_to_descriptor): add call to set the "span".
(gfc_trans_pointer_assignment): set "_len" and antecipate the
initialization of the deferred character length hidden argument.
* trans-intrinsic.c (gfc_conv_associated): set "force_no_tmp" to
avoid the creation of a temporary.
* trans-types.c (gfc_get_dtype_rank_type): rework type detection
so that unlimited polymorphic objects get proper type infomation,
also important for bind(c).
(gfc_get_dtype): add argument to pass the rank if necessary.
(gfc_get_array_type_bounds): cosmetic change to have character
arrays called character instead of unknown.
* trans-types.h (gfc_get_dtype): modify prototype.
* trans.c (get_array_span): rework the way character array "span"
was calculated.
* trans.h (gfc_get_character_len): new prototype.
(gfc_get_character_len_in_bytes): new prototype.
Add "unlimited_polymorphic" flag to "gfc_se" type to signal when
expression carries an unlimited polymorphic object.
libgfortran/ChangeLog:
PR fortran/100120
* intrinsics/associated.c (associated): have associated verify if
the "span" matches insted of the "elem_len".
* libgfortran.h (GFC_DESCRIPTOR_SPAN): add macro to retrive the
descriptor "span".
gcc/testsuite/ChangeLog:
PR fortran/100120
* gfortran.dg/PR100120.f90: New test.
PR fortran/100816
PR fortran/100818
PR fortran/100819
PR fortran/100821
* gfortran.dg/character_workout_1.f90: New test.
* gfortran.dg/character_workout_4.f90: New test.
Jonathan Wakely [Sat, 5 Jun 2021 10:42:01 +0000 (11:42 +0100)]
libstdc++: Fix return type of ranges::ssize for 128-bit integer [PR 100824]
Signed-off-by: Jonathan Wakely <jwakely@redhat.com>
libstdc++-v3/ChangeLog:
PR libstdc++/100824
* include/bits/ranges_base.h (_SSize): Return signed type.
* testsuite/std/ranges/access/ssize.cc: Check with __int128.
Jeff Law [Sat, 5 Jun 2021 05:35:02 +0000 (01:35 -0400)]
* MAINTAINERS: Add myself to DCO section with both email addresses.
Jeff Law [Sat, 5 Jun 2021 05:27:02 +0000 (01:27 -0400)]
Fix split conditions in H8/300 port
gcc/
* config/h8300/addsub.md: Fix split condition in define_insn_and_split
patterns.
* config/h8300/bitfield.md: Likewise.
* config/h8300/combiner.md: Likewise.
* config/h8300/divmod.md: Likewise.
* config/h8300/extensions.md: Likewise.
* config/h8300/jumpcall.md: Likewise.
* config/h8300/movepush.md: Likewise.
* config/h8300/multiply.md: Likewise.
* config/h8300/other.md: Likewise.
* config/h8300/shiftrotate.md: Likewise.
* config/h8300/logical.md: Likewise. Fix split pattern to use
code iterator that somehow slipped through.
GCC Administrator [Sat, 5 Jun 2021 00:16:29 +0000 (00:16 +0000)]
Daily bump.
Jonathan Wakely [Fri, 4 Jun 2021 19:28:04 +0000 (20:28 +0100)]
libstdc++: Implement LWG 3403 for std::ranges::ssize
I already changed the constraints for ranges::ssize to use ranges::size,
this implements the rest of LWG 3403, so that the returned type is the
signed type corresponding to the result of ranges::size.
Signed-off-by: Jonathan Wakely <jwakely@redhat.com>
libstdc++-v3/ChangeLog:
* include/bits/ranges_base.h (_SSize): Return the result of
ranges::size converted to the wider of make-signed-like-t<S> and
ptrdiff_t, rather than the ranges different type.
* testsuite/std/ranges/access/ssize.cc: Adjust expected result
for an iota_view that uses an integer class type for its
difference_type.
Jonathan Wakely [Fri, 4 Jun 2021 19:25:39 +0000 (20:25 +0100)]
libstdc++: Fix helper concept for ranges::data [PR 100824]
We need to decay the result of t.data() before checking if it's a
pointer.
Signed-off-by: Jonathan Wakely <jwakely@redhat.com>
libstdc++-v3/ChangeLog:
PR libstdc++/100824
* include/bits/ranges_base.h (__member_data): Use __decay_copy.
* testsuite/std/ranges/access/data.cc: Add testcase from PR.
Tobias Burnus [Fri, 4 Jun 2021 18:52:33 +0000 (20:52 +0200)]
OpenMP: Handle bind clause in tree-nested.c [PR100905]
PR middle-end/100905
gcc/ChangeLog:
* tree-nested.c (convert_nonlocal_omp_clauses,
convert_local_omp_clauses): Handle OMP_CLAUSE_BIND.
gcc/testsuite/ChangeLog:
* gfortran.dg/gomp/loop-3.f90: New test.
Iain Buclaw [Fri, 4 Jun 2021 17:38:26 +0000 (19:38 +0200)]
d: Fix ICE in gimplify_var_or_parm_decl, at gimplify.c:2755 (PR100882)
Constructor calls for temporaries were reusing the TARGET_EXPR_SLOT of a
TARGET_EXPR for an assignment, which later got passed to `build_assign',
which stripped away the outer TARGET_EXPR, leaving a reference to a lone
temporary with no declaration.
This stripping away of the TARGET_EXPR also discarded any cleanups that
may have been assigned to the expression as well.
So now the reuse of TARGET_EXPR_SLOT has been removed, and
`build_assign' now constructs assignments inside the TARGET_EXPR_INITIAL
slot. This has also been extended to `return_expr', to deal with
possibility of a TARGET_EXPR being returned.
gcc/d/ChangeLog:
PR d/100882
* d-codegen.cc (build_assign): Construct initializations inside
TARGET_EXPR_INITIAL.
(compound_expr): Remove intermediate expressions that have no
side-effects.
(return_expr): Construct returns inside TARGET_EXPR_INITIAL.
* expr.cc (ExprVisitor::visit (CallExp *)): Remove useless assignment
to TARGET_EXPR_SLOT.
gcc/testsuite/ChangeLog:
PR d/100882
* gdc.dg/pr100882a.d: New test.
* gdc.dg/pr100882b.d: New test.
* gdc.dg/pr100882c.d: New test.
* gdc.dg/torture/pr100882.d: New test.
Patrick Palka [Fri, 4 Jun 2021 18:08:26 +0000 (14:08 -0400)]
c++: top-level cv-quals on type of NTTP [PR100893]
Here, we're rejecting the specialization of g<T,F> with T=A, F=&f in
param4.C below due to a spurious constness mismatch between the type of
the template argument &f and the substituted type of the parm F (the
latter has a top-level const). Note that this mismatch doesn't occur
with object pointers because in that case a call to
perform_qualification_conversions from convert_nontype_argument
implicitly adds a top-level const to the argument (via a cast) to match.
This however seems to be a manifestation of a more general conformance
issue: we're not dropping top-level cv-quals on the substituted
type of an NTTP as per [temp.param]/6 (we only do so at parse time in
process_template_parm). So this patch makes convert_template_argument
drop top-level cv-quals accordingly.
PR c++/100893
gcc/cp/ChangeLog:
* pt.c (convert_template_argument): Strip top-level cv-quals
on the substituted type of a non-type template parameter.
gcc/testsuite/ChangeLog:
* g++.dg/template/param4.C: New test.
* g++.dg/template/param5.C: New test.
* g++.dg/cpp1z/nontype-auto19.C: New test.
* g++.dg/cpp2a/concepts-decltype.C: Don't expect that the
deduced type of a decltype(auto) NTTP has top-level cv-quals.
Patrick Palka [Fri, 4 Jun 2021 17:46:53 +0000 (13:46 -0400)]
c++: tsubst_function_decl and excess arg levels [PR100102]
Here, when instantiating the dependent alias template
duration::__is_harmonic with args={{T,U},{int}}, we find ourselves
substituting the function decl _S_gcd. Since we have more arg levels
than _S_gcd has parm levels, an old special case in tsubst_function_decl
causes us to unwantedly reduce args to its innermost level, yielding
args={int}, which leads to a nonsensical substitution into the decl
context and eventually a crash.
The comment for this special case refers to three examples for which we
ought to see more arg levels than parm levels here, but none of the
examples actually demonstrate this. In the first example, when
defining S<int>::f(U) parms_depth is 2 and args_depth is 1, and
later when instantiating say S<int>::f<char> both depths are 2. In the
second example, when substituting the template friend declaration
parms_depth is 2 and args_depth is 1, and later when instantiating f
both depths are 1. Finally, the third example is invalid since we can't
specialize a member template of an unspecialized class template like
that.
Given that this reduction code seems no longer relevant for its
documented purpose and that it causes problems as in the PR, this patch
just removes it. Note that as far as bootstrap/regtest is concerned,
this code is dead; the below two tests would be the first to reach it.
PR c++/100102
gcc/cp/ChangeLog:
* pt.c (tsubst_function_decl): Remove old code for reducing
args when it has excess levels.
gcc/testsuite/ChangeLog:
* g++.dg/cpp0x/alias-decl-72.C: New test.
* g++.dg/cpp0x/alias-decl-72a.C: New test.
Harald Anlauf [Fri, 4 Jun 2021 17:23:48 +0000 (19:23 +0200)]
Fortran - ICE in inline_matmul_assign
Restrict inlining of matmul to those cases where assignment to the
result array does not need special treatment.
gcc/fortran/ChangeLog:
PR fortran/99839
* frontend-passes.c (inline_matmul_assign): Do not inline matmul
if the assignment to the resulting array if it is not of canonical
type (real/integer/complex/logical).
gcc/testsuite/ChangeLog:
PR fortran/99839
* gfortran.dg/inline_matmul_25.f90: New test.
Martin Sebor [Fri, 4 Jun 2021 17:21:51 +0000 (11:21 -0600)]
PR c/100783 - ICE on -Wnonnull and erroneous type
gcc/c-family/ChangeLog:
PR c/100783
* c-attribs.c (positional_argument): Bail on erroneous types.
gcc/c/ChangeLog:
PR c/100783
* c-objc-common.c (print_type): Handle erroneous types.
gcc/testsuite/ChangeLog:
PR c/100783
* gcc.dg/nonnull-6.c: New test.
Tobias Burnus [Fri, 4 Jun 2021 16:51:35 +0000 (18:51 +0200)]
Fortran/OpenMP: Fix -fdump-parse-tree for 'omp loop'
gcc/fortran/ChangeLog
* dump-parse-tree.c (show_code_node): Handle
EXEC_OMP_(TARGET_)(,PARALLEL_,TEAMS_)LOOP.
Martin Sebor [Fri, 4 Jun 2021 16:49:06 +0000 (10:49 -0600)]
PR middle-end/100732 - ICE on sprintf %s with integer argument
gcc/ChangeLog:
PR middle-end/100732
* gimple-fold.c (gimple_fold_builtin_sprintf): Avoid folding calls
with either source or destination argument of invalid type.
* tree-ssa-uninit.c (maybe_warn_pass_by_reference): Avoid checking
calls with arguments of invalid type.
gcc/testsuite/ChangeLog:
PR middle-end/100732
* gcc.dg/tree-ssa/builtin-snprintf-11.c: New test.
* gcc.dg/tree-ssa/builtin-snprintf-12.c: New test.
* gcc.dg/tree-ssa/builtin-sprintf-28.c: New test.
* gcc.dg/tree-ssa/builtin-sprintf-29.c: New test.
* gcc.dg/uninit-pr100732.c: New test.
Martin Sebor [Fri, 4 Jun 2021 16:35:27 +0000 (10:35 -0600)]
PR c/100719 - missing -Wvla-parameter on a mismatch in second parameter
gcc/ChangeLog:
* attribs.c (init_attr_rdwr_indices): Use VLA bounds in the expected
order.
(attr_access::vla_bounds): Also handle VLA bounds.
gcc/c-family/ChangeLog:
* c-warn.c (warn_parm_array_mismatch): Check TREE_PURPOSE to test
for element presence.
gcc/testsuite/ChangeLog:
* gcc.dg/Wvla-parameter-10.c: New test.
* gcc.dg/Wvla-parameter-11.c: New test.
Uros Bizjak [Fri, 4 Jun 2021 15:51:05 +0000 (17:51 +0200)]
i386: Convert a couple of predicates to use match_code RTXes.
No functional changes.
2021-06-04 Uroš Bizjak <ubizjak@gmail.com>
gcc/
* config/i386/predicates.md (GOT_memory_operand):
Implement using match_code RTXes.
(GOT32_symbol_operand): Ditto.
Tobias Burnus [Fri, 4 Jun 2021 15:43:59 +0000 (17:43 +0200)]
Fortran: Fix OpenMP/OpenACC continue-line parsing
gcc/fortran/ChangeLog:
* scanner.c (skip_fixed_omp_sentinel): Set openacc_flag if
this is not an (OpenMP) continuation line.
(skip_fixed_oacc_sentinel): Likewise for openmp_flag and OpenACC.
(gfc_next_char_literal): gfc_error_now to force error for mixed OMP/ACC
continuation once per location and return '\n'.
gcc/testsuite/ChangeLog:
* gfortran.dg/goacc/omp-fixed.f: Re-add test item changed in previous
commit in addition - add more dg-errors and '... end ...' due to changed
parsing.
* gfortran.dg/goacc/omp.f95: Likewise.
* gfortran.dg/goacc-gomp/mixed-1.f: New test.
Uros Bizjak [Fri, 4 Jun 2021 15:37:15 +0000 (17:37 +0200)]
i386: Add init pattern for V2HI vectors [PR100637]
2021-06-03 Uroš Bizjak <ubizjak@gmail.com>
gcc/
PR target/100637
* config/i386/i386-expand.c (ix86_expand_vector_init_duplicate):
Handle V2HI mode.
(ix86_expand_vector_init_general): Ditto.
Use SImode instead of word_mode for logic operations
when GET_MODE_SIZE (mode) < UNITS_PER_WORD.
(expand_vec_perm_even_odd_1): Assert that V2HI mode should be
implemented by expand_vec_perm_1.
(expand_vec_perm_broadcast_1): Assert that V2HI and V4HI modes
should be implemented using standard shuffle patterns.
(ix86_vectorize_vec_perm_const): Handle V2HImode. Add V4HI and
V2HI modes to modes, implementable with shuffle for one operand.
* config/i386/mmx.md (*punpckwd): New insn_and_split pattern.
(*pshufw_1): New insn pattern.
(*vec_dupv2hi): Ditto.
(vec_initv2hihi): New expander.
gcc/testsuite/
PR target/100637
* gcc.dg/vect/slp-perm-9.c (dg-final): Adjust dumps for vect32 targets.
Jonathan Wakely [Fri, 4 Jun 2021 14:59:38 +0000 (15:59 +0100)]
libstdc++: Fix value categories used by ranges access CPOs [PR 100824]
The implementation of P2091R0 was incomplete, so that some range access
CPOs used perfect forwarding where they should not. This fixes it by
consistently operating on lvalues.
Some additional changes that are not necessary to fix the bug:
Modify the __as_const helper to simplify its usage. Instead of deducing
the value category from its argument, and requiring callers to forward
the argument as the correct category, add a non-deduced template
parameter which is used for the value category and accept the argument
as an lvalue. This means callers say __as_const<T>(t) instead of
__as_const(std::forward<T>(t)).
Always use an lvalue reference type as the template argument for the
_S_noexcept helpers, so that we only instantiate one specialization for
lvalues and rvalues of the same type.
Move some helper concepts and functions from namespace std::__detail
to ranges::__cust_access, to be consistent with the ranges::begin CPO.
This ensures that the __adl_begin concept and the _Begin::operator()
function are in the same namespace, so unqualified lookup is consistent
and the poison pills for begin are visible to both.
Simplified static assertions for arrays, because the expression a+0 is
already ill-formed for an array of incomplete type.
Signed-off-by: Jonathan Wakely <jwakely@redhat.com>
libstdc++-v3/ChangeLog:
PR libstdc++/100824
* include/bits/iterator_concepts.h (__detail::__decay_copy)
(__detail::__member_begin, __detail::__adl_begin): Move to
namespace ranges::__cust_access.
(__detail::__ranges_begin): Likewise, and rename to __begin.
Remove redundant static assertion.
* include/bits/ranges_base.h (_Begin, _End, _RBegin, _REnd):
Use lvalue in noexcept specifier.
(__as_const): Add non-deduced parameter for value category.
(_CBegin, _CEnd, _CRBegin, _CREnd, _CData): Adjust uses of
__as_const.
(__member_size, __adl_size, __member_empty, __size0_empty):
(__eq_iter_empty, __adl_data): Use lvalue objects in
requirements.
(__sentinel_size): Likewise. Add check for conversion to
unsigned-like.
(__member_data): Allow non-lvalue types to satisfy the concept,
but use lvalue object in requirements.
(_Size, _SSize): Remove forwarding to always use an lvalue.
(_Data): Likewise. Add static assertion for arrays.
* testsuite/std/ranges/access/cdata.cc: Adjust expected
behaviour for rvalues. Add negative tests for ill-formed
expressions.
* testsuite/std/ranges/access/data.cc: Likewise.
* testsuite/std/ranges/access/empty.cc: Adjust expected
behaviour for rvalues.
* testsuite/std/ranges/access/size.cc: Likewise.
Tim Adye [Fri, 4 Jun 2021 14:59:38 +0000 (15:59 +0100)]
libstdc++: Optimize std::any_cast by replacing indirect call
This significantly improves the performance of std::any_cast, by
avoiding an indirect call to the _S_manage function through a function
pointer. Before we make that indirect call we've already established
that the contained value has the expected type, which means we also know
the manager type, and so can call one of its members directly.
We also know the precise type in the any::emplace functions, because
we've just constructed that type, so we can use the new member there
too. That doesn't seem to affect performance, but we might as well use
the new _S_access function anyway.
Signed-off-by: Tim Adye <Tim.Adye@cern.ch>
Signed-off-by: Jonathan Wakely <jwakely@redhat.com>
libstdc++-v3/ChangeLog:
* include/std/any (any::_Manager::_S_access): New static
function to access the contained value.
(any::emplace, __any_caster): Use _S_access member of the
manager type.
Jonathan Wakely [Fri, 4 Jun 2021 14:59:37 +0000 (15:59 +0100)]
libstdc++: Add feature test macro for heterogeneous lookup in unordered containers
Also update the C++20 status docs.
Signed-off-by: Jonathan Wakely <jwakely@redhat.com>
libstdc++-v3/ChangeLog:
* doc/xml/manual/status_cxx2020.xml:
* doc/html/*: Regenerate.
* include/bits/hashtable.h (__cpp_lib_generic_unordered_lookup):
Define.
* include/std/version (__cpp_lib_generic_unordered_lookup):
Define.
* testsuite/23_containers/unordered_map/operations/1.cc: Check
feature test macro.
* testsuite/23_containers/unordered_set/operations/1.cc:
Likewise.
Tobias Burnus [Fri, 4 Jun 2021 11:26:40 +0000 (13:26 +0200)]
gfortran.dg/gomp/pr99928-5.f90: Use proper iteration var
gcc/testsuite/ChangeLog:
* gfortran.dg/gomp/pr99928-5.f90: Really use the
proper iteration variable.
Tobias Burnus [Fri, 4 Jun 2021 11:10:57 +0000 (13:10 +0200)]
gfortran.dg/gomp/pr99928-*.f90: Use implicit none, remove one xfail
gcc/testsuite/ChangeLog:
* gfortran.dg/gomp/pr99928-1.f90: Add 'implicit none'.
* gfortran.dg/gomp/pr99928-11.f90: Likewise.
* gfortran.dg/gomp/pr99928-4.f90: Likewise.
* gfortran.dg/gomp/pr99928-6.f90: Likewise.
* gfortran.dg/gomp/pr99928-8.f90: Likewise.
* gfortran.dg/gomp/pr99928-2.f90: Likewise. Add missing decl.
* gfortran.dg/gomp/pr99928-5.f90: Add implicit none;
fix loop-variable and remove xfail.
Kewen Lin [Fri, 28 May 2021 05:20:49 +0000 (00:20 -0500)]
arm: Update unexpected empty split condition
gcc/ChangeLog:
* config/arm/vfp.md (no_literal_pool_df_immediate,
no_literal_pool_sf_immediate): Fix empty split condition.
Kewen Lin [Fri, 28 May 2021 05:21:00 +0000 (00:21 -0500)]
i386: Update unexpected empty split condition
gcc/ChangeLog:
* config/i386/i386.md (*load_tp_x32_zext, *add_tp_x32_zext,
*tls_dynamic_gnu2_combine_32): Fix empty split condition.
* config/i386/sse.md (*<sse2_avx2>_pmovmskb_lt,
*<sse2_avx2>_pmovmskb_zext_lt, *sse2_pmovmskb_ext_lt,
*<sse4_1_avx2>_pblendvb_lt): Likewise.
Tobias Burnus [Fri, 4 Jun 2021 10:14:14 +0000 (12:14 +0200)]
Fortran/OpenMP: omp loop's BIND clause - fix typo
Missed a 'git add' after fixing this typo pointed out during review.
PR middle-end/99928
gcc/fortran/ChangeLog:
* openmp.c (gfc_match_omp_clauses): Fix typo in error message.
gcc/testsuite/ChangeLog:
* gfortran.dg/gomp/loop-2.f90: Update for typo fix.
Tobias Burnus [Fri, 4 Jun 2021 10:06:59 +0000 (12:06 +0200)]
Fortran/OpenMP: Add omp loop [PR99928]
PR middle-end/99928
gcc/fortran/ChangeLog:
* dump-parse-tree.c (show_omp_clauses): Handle bind clause.
(show_omp_node): Handle loop directive.
* frontend-passes.c (gfc_code_walker): Likewise.
* gfortran.h (enum gfc_statement): Add
ST_OMP_(END_)(TARGET_)(|PARALLEL_|TEAMS_)LOOP.
(enum gfc_omp_bind_type): New.
(gfc_omp_clauses): Use it.
(enum gfc_exec_op): Add EXEC_OMP_(TARGET_)(|PARALLEL_|TEAMS_)LOOP.
* match.h (gfc_match_omp_loop, gfc_match_omp_parallel_loop,
gfc_match_omp_target_parallel_loop, gfc_match_omp_target_teams_loop,
gfc_match_omp_teams_loop): New.
* openmp.c (enum omp_mask1): Add OMP_CLAUSE_BIND.
(gfc_match_omp_clauses): Handle it.
(OMP_LOOP_CLAUSES, gfc_match_omp_loop, gfc_match_omp_teams_loop,
gfc_match_omp_target_teams_loop, gfc_match_omp_parallel_loop,
gfc_match_omp_target_parallel_loop): New.
(resolve_omp_clauses, resolve_omp_do, omp_code_to_statement,
gfc_resolve_omp_directive): Handle omp loop.
* parse.c (decode_omp_directive case_exec_markers, gfc_ascii_statement,
parse_omp_do, parse_executable): Likewise.
(parse_omp_structured_block): Remove ST_ which use parse_omp_do.
* resolve.c (gfc_resolve_blocks): Add omp loop.
* st.c (gfc_free_statement): Likewise.
* trans-openmp.c (gfc_trans_omp_clauses): Handle bind clause.
(gfc_trans_omp_do, gfc_trans_omp_parallel_do, gfc_trans_omp_distribute,
gfc_trans_omp_teams, gfc_trans_omp_target, gfc_trans_omp_directive):
Handle loop directive.
(gfc_split_omp_clauses): Likewise; fix firstprivate/lastprivate
and (in_)reduction for taskloop.
* trans.c (trans_code): Handle omp loop directive.
gcc/testsuite/ChangeLog:
* gfortran.dg/gomp/pr99928-3.f90: Add 'default(none)', following
C/C++ version of the patch.
* gfortran.dg/gomp/loop-1.f90: New test.
* gfortran.dg/gomp/loop-2.f90: New test.
* gfortran.dg/gomp/pr99928-1.f90: New test; based on C/C++ test.
* gfortran.dg/gomp/pr99928-11.f90: Likewise.
* gfortran.dg/gomp/pr99928-2.f90: Likewise.
* gfortran.dg/gomp/pr99928-4.f90: Likewise.
* gfortran.dg/gomp/pr99928-5.f90: Likewise.
* gfortran.dg/gomp/pr99928-6.f90: Likewise.
* gfortran.dg/gomp/pr99928-8.f90: Likewise.
* gfortran.dg/goacc/omp.f95: Use 'acc kernels loops' instead
of 'acc loops' to hide unrelated bug for now.
* gfortran.dg/goacc/omp-fixed.f: Likewise
Jakub Jelinek [Fri, 4 Jun 2021 09:20:02 +0000 (11:20 +0200)]
x86: Fix ix86_expand_vector_init for V*TImode [PR100887]
We have vec_initv4tiv2ti and vec_initv2titi patterns which call
ix86_expand_vector_init and assume it works for those modes. For the
case of construction from two half-sized vectors, the code assumes it
will always succeed, but we have only insn patterns with SImode and DImode
element types. QImode and HImode element types are already handled
by performing it with same sized vectors with SImode elements and the
following patch extends that to V*TImode vectors.
2021-06-04 Jakub Jelinek <jakub@redhat.com>
PR target/100887
* config/i386/i386-expand.c (ix86_expand_vector_init): Handle
concatenation from half-sized modes with TImode elements.
* gcc.target/i386/pr100887.c: New test.
Jakub Jelinek [Fri, 4 Jun 2021 09:17:05 +0000 (11:17 +0200)]
c++: Fix up attribute handling in methods in templates [PR100872]
The following testcase FAILs because a dependent (late) attribute is never
tsubsted. While the testcase is OpenMP, I think it is a generic C++ FE problem
that could affect any other dependent attribute.
apply_late_template_attributes documents that it relies on
/* save_template_attributes puts the dependent attributes at the beginning of
the list; find the non-dependent ones. */
The "operator binding" attributes that are sometimes added are added to the
head of DECL_ATTRIBUTES list though and because it doesn't have
ATTR_IS_DEPENDENT set it violates this requirement.
The following patch fixes it by adding that attribute after all
ATTR_IS_DEPENDENT attributes. I'm not 100% sure if DECL_ATTRIBUTES can't be
shared by multiple functions (e.g. the cdtor clones), but the code uses
later remove_attribute which could break that too.
Other option would be to copy_list the ATTR_IS_DEPENDENT portion of the
DECL_ATTRIBUTES list if we need to do this, that would be the same as this
patch but replace that *ap = op_attr; at the end with
*ap = NULL_TREE;
DECL_ATTRIBUTES (cfn) = chainon (copy_list (DECL_ATTRIBUTES (cfn)),
op_attr);
Or perhaps set ATTR_IS_DEPENDENT on the "operator bindings" attribute,
though it would need to be studied what would it try to do with the
attribute during tsubst.
2021-06-04 Jakub Jelinek <jakub@redhat.com>
PR c++/100872
* name-lookup.c (maybe_save_operator_binding): Add op_attr after all
ATTR_IS_DEPENDENT attributes in the DECL_ATTRIBUTES list rather than
to the start.
* g++.dg/gomp/declare-simd-8.C: New test.
Claudiu Zissulescu [Fri, 4 Jun 2021 07:12:32 +0000 (10:12 +0300)]
arc: Don't allow millicode thunks with reduced register set CPUs.
The millicode thunks are not reduced register set safe. Disable them
for CPUs having this option on.
gcc/
2021-06-04 Claudiu Zissulescu <claziss@synopsys.com>
* config/arc/arc.c (arc_override_options): Disable millicode
thunks when RF16 is on.
Signed-off-by: Claudiu Zissulescu <claziss@synopsys.com>
Haochen Gui [Fri, 4 Jun 2021 06:38:53 +0000 (14:38 +0800)]
rs6000: Disable mode promotion for pseudos
rs6000 has instructions that can do almost everything 32 bit
at least as efficiently as corresponding 64 bit things. The
mode promotion can be defered to when a wide mode is necessary.
So it helps a lot not promote mode for pseudos. SPECint test
shows that the overall performance improvement (by geomean) is
more than 2% with this patch.
testsuite/gcc.target/powerpc/not-promote-mode.c illustrates how
the patch eliminates the redundant extensions and do further
optimization by disabling mode promotion for pseduos.
gcc/ChangeLog
* config/rs6000/rs6000.h (PROMOTE_MODE): Remove.
gcc/testsuite/ChangeLog:
* gcc.target/powerpc/not-promote-mode.c: New.
Haochen Gui [Fri, 4 Jun 2021 03:04:31 +0000 (11:04 +0800)]
rs6000: Expand PROMOTE_MODE marco in rs6000_promote_function_mode
This patch prepares for the patch which disables mode
promotion of pseudos on rs6000.
gcc/ChangeLog:
* config/rs6000/rs6000-call.c (rs6000_promote_function_mode):
Replace PROMOTE_MODE marco with its content.
GCC Administrator [Fri, 4 Jun 2021 00:16:24 +0000 (00:16 +0000)]
Daily bump.
Kewen Lin [Wed, 2 Jun 2021 05:04:54 +0000 (07:04 +0200)]
cris: Update unexpected empty split condition
gcc/ChangeLog:
* config/cris/cris.md (*addi_reload): Fix empty split condition.
Jim Wilson [Thu, 3 Jun 2021 20:50:34 +0000 (13:50 -0700)]
RISC-V: Enable riscv attributes by default for all riscv targets.
These were only enabled for embedded elf originally because that was
the safe option, and linux had no obvious use for them. But now that
we have new extensions coming like V that affect process state and ABIs,
the attributes are expected to be useful for linux, and may be required
by the psABI. clang already emits them for all riscv targets.
gcc/
* config.gcc (riscv*-*-*): If --with-riscv-attribute not used,
turn it on for all riscv targets.
Uros Bizjak [Thu, 3 Jun 2021 18:05:31 +0000 (20:05 +0200)]
i386: Add insert and extract patterns for 4-byte vectors [PR100637]
The patch introduces insert and extract patterns for 4-byte vectors.
It effectively only emits PINSR and PEXTR instructions when available,
otherwise falls back to generic code that emulates these instructions
via inserts, extracts, logic operations and shifts in integer registers.
Please note that generic fallback produces better code than the current
approach of constructing new vector in memory (due to store forwarding stall)
so also enable QImode 8-byte vector inserts only with TARGET_SSE4_1.
2021-06-03 Uroš Bizjak <ubizjak@gmail.com>
gcc/
PR target/100637
* config/i386/i386-expand.c (ix86_expand_vector_set):
Handle V2HI and V4QI modes.
(ix86_expand_vector_extract): Ditto.
* config/i386/mmx.md (*pinsrw): New insn pattern.
(*pinsrb): Ditto.
(*pextrw): Ditto.
(*pextrw_zext): Ditto.
(*pextrb): Ditto.
(*pextrb_zext): Ditto.
(vec_setv2hi): New expander.
(vec_extractv2hihi): Ditto.
(vec_setv4qi): Ditto.
(vec_extractv4qiqi): Ditto.
(vec_setv8qi): Enable only for TARGET_SSE4_1.
(vec_extractv8qiqi): Ditto.
gcc/testsuite/
PR target/100637
* gcc.target/i386/vperm-v2hi.c: New test.
* gcc.target/i386/vperm-v4qi.c: Ditto.
Aaron Sawdey [Thu, 3 Jun 2021 03:54:08 +0000 (22:54 -0500)]
Fix operand order to subf for p10 fusion.
This certainly causes a bootstrap miscompare, and might also be
responsible for PR/100820. The operands to subf were reversed
in the logical-add/sub fusion patterns, and I screwed up my
bootstrap test which is how it ended up getting committed.
gcc/ChangeLog
* config/rs6000/genfusion.pl (gen_logical_addsubf): Fix input
order to subf instruction.
* config/rs6000/fusion.md: Regenerate.
Patrick Palka [Thu, 3 Jun 2021 16:30:29 +0000 (12:30 -0400)]
libstdc++: Avoid hard error in ranges::unique_copy [PR100770]
Here, in the constexpr if condition within ranges::unique_copy, when
input_iterator<_Out> isn't satisfied we must avoid substituting into
iter_value_t<_Out> because the latter isn't necessarily well-formed
then. To that end, this patch factors out the condition into a concept
and uses it throughout.
This patch also makes the definition of our testsuite
output_iterator_wrapper more minimal by setting its value_type, pointer
and reference member types to void. This means our existing tests for
unique_copy already exercise the fix for this bug, so we don't need
to add another test. The only other fallout of this testsuite iterator
change appears in std/ranges/range.cc, where the use of range_value_t
on a test_output_range is now ill-formed.
libstdc++-v3/ChangeLog:
* include/bits/ranges_algo.h (__detail::__can_reread_output):
Factor out this concept from ...
(__unique_copy_fn::operator()): ... here. Use the concept
throughout.
* testsuite/std/ranges/range.cc: Remove now ill-formed use
of range_value_t on an output_range.
* testsuite/util/testsuite_iterators.h (output_iterator_wrapper):
Define value_type, pointer and reference member types to void.
Eric Botcazou [Thu, 3 Jun 2021 15:54:45 +0000 (17:54 +0200)]
Fix issue for nested record types with -fdump-ada-spec
Ada does not support anonymous record declarations nested in other record
declarations so -fdump-ada-spec needs to unnest them, and this contains a
few fixes for this machinery.
gcc/c-family/
* c-ada-spec.c (dump_ada_macros): Minor tweaks.
(dump_ada_decl_name): Likewise.
(dump_anonymous_type_name): Remove parent parameter and adjust.
(dump_sloc): Minor tweak.
(dump_ada_array_type): Remove type parameter and adjust.
(dump_ada_enum_type): Remove parent parameter and adjust.
(dump_ada_node): Adjust calls to above functions.
(dumped_anonymous_types): New global variable.
(dump_nested_types_1): Rename into...
(dump_nested_types): ...this.
(dump_nested_type): Remove parent and dumped_types parameters.
<ARRAY_TYPE>: Replace dumped_types with dumped_anonymous_types.
Adjust calls to dump_anonymous_type_name and dump_ada_array_type.
(dump_ada_specs): Initialize and free dumped_anonymous_types.
Eric Botcazou [Thu, 3 Jun 2021 15:50:44 +0000 (17:50 +0200)]
Fix issue for external subtypes with -fdump-ada-spec
This works around an irregularity of the language whereby subtypes, unlike
types, are not visible through a limited_with clause.
gcc/c-family/
* c-ada-spec.c (pp_ada_tree_identifier): Tidy up.
(dump_ada_node) <POINTER_TYPE>: Deal specially with external subtypes.
Eric Botcazou [Thu, 3 Jun 2021 15:46:15 +0000 (17:46 +0200)]
Fix duplicate name issues in output of -fdump-ada-spec
The namespace rules are different in the C family of languages and
in Ada, and a few adjustments are further needed in -fdump-ada-spec
because of them.
gcc/c-family/
* c-ada-spec.c (dump_ada_enum_type): Dump a prefix for constants.
(htable_t): New typedef.
(overloaded_names): Use it.
(add_name): New function.
(init_overloaded_names): Use add_name to populate the table and add
special cases for sigaction and stat.
(overloaded_name_p): Rename into...
(overloading_index): ...this. Do not initialize overloaded_names table
here. Return the index or zero.
(dump_ada_declaration): Minor tweaks. Do not skip overloaded functions
but add an overloading suffix instead.
(dump_ada_specs): Initialize overloaded_names tables here.
Aldy Hernandez [Wed, 26 May 2021 06:53:07 +0000 (08:53 +0200)]
Replace uses of determine_value_range with range_of_expr.
The expression evaluator changes to the range_query API provide
everything determine_value_range does. This patch replaces all uses
with calls into the range_query API.
gcc/ChangeLog:
* calls.c (get_size_range): Use range_of_expr instead of
determine_value_range.
* tree-affine.c (expr_to_aff_combination): Same.
* tree-data-ref.c (split_constant_offset): Same.
* tree-vrp.c (determine_value_range_1): Remove.
(determine_value_range): Remove.
* tree-vrp.h (determine_value_range): Remove.
Aldy Hernandez [Wed, 26 May 2021 06:40:17 +0000 (08:40 +0200)]
Implement generic expression evaluator for range_query.
Right now, range_of_expr only works with constants, SSA names, and
pointers. Anything else gets returned as VARYING. This patch adds the
capability to deal with arbitrary expressions, inasmuch as these
tree codes are implemented in range-ops.cc.
This will give us the ability to ask for the range of any tree expression,
not just constants and SSA names, with range_of_expr().
This is a more generic implementation of determine_value_range in VRP.
A follow-up patch will remove all uses of it in favor of the
range_query API.
gcc/ChangeLog:
* function-tests.c (test_ranges): Call gimple_range_tests.
* gimple-range-cache.cc (ranger_cache::range_of_expr): Pass stmt
to get_tree_range.
* gimple-range.cc (fur_source::get_operand): Do not call
get_tree_range or gimple_range_global.
get_tree_range.
(get_tree_range): Move to value-query.cc.
Call get_arith_expr_range.
(gimple_ranger::range_of_expr): Add argument to get_tree_range.
Include gimple-range-tests.cc.
* gimple-range.h (fold_range): Add argument.
(get_tree_range): Remove.
* selftest.h (gimple_range_tests): New.
* value-query.cc (global_range_query::range_of_expr): Add
stmt argument.
(range_query::get_tree_range): Move from gimple-range.cc.
* value-query.h (class range_query): Add get_tree_range and
get_arith_expr_range. Make fur_source a friend.
* vr-values.c (vr_values::range_of_expr): Pass stmt to
get_tree_range.
* gimple-range-tests.cc: New file.
Jason Merrill [Thu, 3 Jun 2021 04:10:47 +0000 (00:10 -0400)]
MAINTAINERS: Add DCO version number.
ChangeLog:
* MAINTAINERS: Add DCO version number.
Aldy Hernandez [Tue, 1 Jun 2021 15:48:30 +0000 (17:48 +0200)]
Use known global ranges in export_global_ranges
This patch modifies export_global_ranges to take into account current
global ranges. It also handles enhances said function to export pointer
global ranges as well.
gcc/ChangeLog:
* gimple-range.cc (gimple_ranger::export_global_ranges): Call
update_global_range.
* value-query.cc (update_global_range): New.
* value-query.h (update_global_range): New.
gcc/testsuite/ChangeLog:
* gcc.dg/pr80776-1.c: XFAIL and document the reason why.
David Malcolm [Thu, 3 Jun 2021 14:37:41 +0000 (10:37 -0400)]
analyzer: remove unused prototypes
gcc/analyzer/ChangeLog:
* store.h (store::get_direct_binding): Remove unused decl.
(store::get_default_binding): Likewise.
Signed-off-by: David Malcolm <dmalcolm@redhat.com>
David Malcolm [Thu, 3 Jun 2021 14:35:27 +0000 (10:35 -0400)]
analyzer: show types for poisoned_svalue and compound_svalue
gcc/analyzer/ChangeLog:
* svalue.cc (poisoned_svalue::dump_to_pp): Dump type.
(compound_svalue::dump_to_pp): Dump any type.
Signed-off-by: David Malcolm <dmalcolm@redhat.com>
David Malcolm [Thu, 3 Jun 2021 14:32:40 +0000 (10:32 -0400)]
diagnostic-show-locus: tweak rejection logic
gcc/ChangeLog:
* diagnostic-show-locus.c (diagnostic_show_locus): Don't reject
printing the same location twice if there are fix-it hints,
multiple locations, or a label.
Signed-off-by: David Malcolm <dmalcolm@redhat.com>
Patrick Palka [Thu, 3 Jun 2021 13:49:30 +0000 (09:49 -0400)]
libstdc++: Simplify range adaptors' forwarding of bound args [PR100577]
r11-8053 rewrote the range adaptor implementation in conformance with
P2281R1, making partial application act like a SFINAE-friendly perfect
forwarding call wrapper. Making SFINAE-friendliness coexist with
perfect forwarding here requires adding fallback deleted operator()
overloads (as described in e.g. section 5.5 of P0847R6). But
unfortunately, as reported in PR100577, this necessary technique of
using of deleted overloads regresses diagnostics for ill-formed calls to
partially applied range adaptors in GCC.
Although GCC's diagnostics can arguably be improved here by having the
compiler explain why the other candidates weren't viable when overload
resolution selects a deleted candidate, we can also largely work around
this on the library side (and achieve more concise diagnostics than by
a frontend-side improvement alone) if we take advantage of the
observation that not all range adaptors need perfect forwarding call
wrapper semantics, in fact only views::split currently needs it, because
all other range adaptors either take no extra arguments or only
arguments that are expected to be freely/cheaply copyable, e.g. function
objects and integer-like types. (The discussion section in P2281R1 goes
into detail about why views::split is special.)
To that end, this introduces opt-in flags for denoting a range adaptor
as having "simple" extra arguments (in the case of a range adaptor
non-closure) or having a "simple" call operator (in the case of a range
adaptor closure). These flags are then used to conditionally simplify
the operator() for the generic _Partial and _Pipe class templates, down
from needing three overloads thereof (including one defined as deleted)
to just needing a single overload. The end result is that diagnostic
quality is restored for all adaptors except for views::split, and
diagnostics for the adaptors are generally made more concise since
there's only a single _Partial/_Pipe overload to diagnose instead of
three of them.
libstdc++-v3/ChangeLog:
PR libstdc++/100577
* include/std/ranges (_RangeAdaptorClosure): Document
_S_has_simple_call_op mechanism.
(_RangeAdaptor): Document _S_has_simple_extra_args mechanism.
(__closure_has_simple_call_op): New concept.
(__adaptor_has_simple_extra_args): Likewise.
(_Partial<_Adaptor, _Args...>): New partial specialization.
(_Partial<_Adaptor, _Arg>): Likewise.
(_Pipe<_Lhs, _Rhs>): Likewise.
(views::_All::_S_has_simple_call_op): Define to true.
(views::_Filter::_S_has_simple_extra_args): Likewise.
(views::_Transform::_S_has_simple_extra_args): Likewise.
(views::_Take::_S_has_simple_extra_args): Likewise.
(views::_TakeWhile::_S_has_simple_extra_args): Likewise.
(views::_Drop::_S_has_simple_extra_args): Likewise.
(views::_DropWhile::_S_has_simple_extra_args): Likewise.
(views::_Join::_S_has_simple_call_op): Likewise.
(views::_Split): Document why we don't define
_S_has_simple_extra_args to true for this adaptor.
(views::_Common::_S_has_simple_call_op): Define to true.
(views::_Reverse::_S_has_simple_call_op): Likewise.
(views::_Elements::_S_has_simple_call_op): Likewise.
* testsuite/std/ranges/adaptors/100577.cc: New test.
Patrick Palka [Thu, 3 Jun 2021 13:39:13 +0000 (09:39 -0400)]
c++: cv-qualified dependent name of alias tmpl [PR100592]
Here, the dependent template name in the return type of f() resolves to
an alias of int& after substitution, and we end up complaining about
qualifying this reference type with 'const' from cp_build_qualified_type
rather than just silently dropping the qualification as per [dcl.ref]/1.
The problem is ultimately that make_typename_type ignores the
tf_keep_type_decl flag when the dependent name is a template-id. This
in turn causes the TYPE_DECL check within tsubst <case TYPENAME_TYPE>
to fail, and so we end up not passing tf_ignore_bad_quals to
cp_build_qualified_type. This patch fixes this by making
make_typename_type respect the tf_keep_type_decl flag in this situation.
PR c++/100592
gcc/cp/ChangeLog:
* decl.c (make_typename_type): After calling
lookup_template_class, adjust the result to its TYPE_NAME and
then consider the tf_keep_type_decl flag.
gcc/testsuite/ChangeLog:
* g++.dg/cpp0x/alias-decl-71.C: New test.