Andrew Pinski [Fri, 24 Nov 2023 02:55:30 +0000 (18:55 -0800)]
Fix contracts-tmpl-spec2.C on targets where plain char is unsigned by default
Since contracts-tmpl-spec2.C is just testing contracts, I thought it would be better
to just add `-fsigned-char` to the options rather than change the testcase to support
both cases.
Committed after testing on aarch64-linux-gnu.
gcc/testsuite/ChangeLog:
PR testsuite/108321
* g++.dg/contracts/contracts-tmpl-spec2.C: Add -fsigned-char
to options.
Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>
Andrew Pinski [Wed, 22 Nov 2023 02:25:24 +0000 (18:25 -0800)]
Fix gcc.target/aarch64/movk.c testcase after IPA-VRP improvement for return values
The problem here is dummy_number_generator returns a constant which IPA VRP is now able
propagate that so we need to mark the funciton as noipa to stop that.
gcc/testsuite/ChangeLog:
PR testsuite/112688
* gcc.target/aarch64/movk.c: Add noipa on dummy_number_generator
and remove -fno-inline option.
Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>
Jakub Jelinek [Sat, 25 Nov 2023 09:31:55 +0000 (10:31 +0100)]
i386: Fix up *jcc_bt*_mask{,_1} [PR111408]
The following testcase is miscompiled in GCC 14 because the
*jcc_bt<mode>_mask and *jcc_bt<SWI48:mode>_mask_1 patterns have just
one argument in (match_operator 0 "bt_comparison_operator" [...])
but as bt_comparison_operator is eq,ne, we need two.
The md readers don't warn about it, after all, some checks can
be done in the predicate rather than specified explicitly, and the
behavior is that anything is accepted as the second argument.
I went through all other i386.md match_operator uses and all others
looked right (extract_operator using 3 operands, all others 2).
I think we'll want to fix this at different spots in older releases
because I think the bug was introduced already in 2008, though most
likely just latent.
2023-11-25 Jakub Jelinek <jakub@redhat.com>
PR target/111408
* config/i386/i386.md (*jcc_bt<mode>_mask,
*jcc_bt<SWI48:mode>_mask_1): Add (const_int 0) as expected
second operand of bt_comparison_operator.
Jakub Jelinek [Sat, 25 Nov 2023 09:30:39 +0000 (10:30 +0100)]
aarch64: Fix up aarch64_simd_stp<mode> [PR109977]
The aarch64_simd_stp<mode> pattern uses w constraint in one alternative and
r in another, but for the latter incorrectly uses <vw> iterator in %<vw>1 which
expands to %d1 for V2DF and %s1 for V2SF and V4SF (this one not relevant to
the pattern) and %w1 for others, so it ICEs if the alternative is selected
during final. Compared to this, <vwcore> macro has the same values for all
modes but uses w for V2DF and V2SF.
2023-11-24 Andrew Pinski <pinskia@gmail.com>
Jakub Jelinek <jakub@redhat.com>
PR target/109977
* config/aarch64/aarch64-simd.md (aarch64_simd_stp<mode>): Use <vwcore>
rather than %<vw> for alternative with r constraint on input operand.
Nathaniel Shead [Fri, 10 Nov 2023 03:28:40 +0000 (14:28 +1100)]
c++: more checks for exporting names with using-declarations
Currently only functions are directly checked for validity when
exporting via a using-declaration. This patch also checks exporting
non-external names of variables, types, and enumerators. This also
prevents ICEs with `export using enum` for internal-linkage enums.
While we're at it this patch also improves the error messages for these
cases to provide more context about what went wrong.
gcc/cp/ChangeLog:
* name-lookup.cc (check_can_export_using_decl): New.
(do_nonmember_using_decl): Use above to check if names can be
exported.
gcc/testsuite/ChangeLog:
* g++.dg/modules/using-10.C: New test.
* g++.dg/modules/using-enum-2.C: New test.
Nathaniel Shead [Mon, 13 Nov 2023 05:48:36 +0000 (16:48 +1100)]
c++: Allow exporting a typedef redeclaration [PR102341]
A typedef doesn't create a new entity, and thus should be allowed to be
exported even if it has been previously declared un-exported. See the
example in [module.interface] p6:
export module M;
struct S { int n; };
typedef S S;
export typedef S S; // OK, does not redeclare an entity
PR c++/102341
gcc/cp/ChangeLog:
* decl.cc (duplicate_decls): Allow exporting a redeclaration of
a typedef.
gcc/testsuite/ChangeLog:
* g++.dg/modules/export-1.C: Adjust test.
* g++.dg/modules/export-2_a.C: New test.
* g++.dg/modules/export-2_b.C: New test.
Lewis Hyatt [Wed, 1 Nov 2023 17:01:12 +0000 (13:01 -0400)]
preprocessor: Reinitialize frontend parser after loading a PCH [PR112319]
Since r14-2893, the frontend parser object needs to exist when running in
preprocess-only mode, because pragma_lex() is now called in that mode and
needs to make use of it. This is handled by calling c_init_preprocess() at
startup. If -fpch-preprocess is in effect (commonly, because of
-save-temps), a PCH file may be loaded during preprocessing, in which
case the parser will be destroyed, causing the issue noted in the
PR. Resolve it by reinitializing the frontend parser after loading the PCH.
gcc/c-family/ChangeLog:
PR pch/112319
* c-ppoutput.cc (cb_read_pch): Reinitialize the frontend parser
after loading a PCH.
gcc/testsuite/ChangeLog:
PR pch/112319
* g++.dg/pch/pr112319.C: New test.
* g++.dg/pch/pr112319.Hs: New test.
* gcc.dg/pch/pr112319.c: New test.
* gcc.dg/pch/pr112319.hs: New test.
Martin Jambor [Fri, 24 Nov 2023 16:32:35 +0000 (17:32 +0100)]
sra: SRA of non-escaped aggregates passed by reference to calls
PR109849 shows that a loop that heavily pushes and pops from a stack
implemented by a C++ std::vec results in slow code, mainly because the
vector structure is not split by SRA and so we end up in many loads
and stores into it. This is because it is passed by reference
to (re)allocation methods and so needs to live in memory, even though
it does not escape from them and so we could SRA it if we
re-constructed it before the call and then separated it to distinct
replacements afterwards.
This patch does exactly that, first relaxing the selection of
candidates to also include those which are addressable but do not
escape and then adding code to deal with the calls. The
micro-benchmark that is also the (scan-dump) testcase in this patch
runs twice as fast with it than with current trunk. Honza measured
its effect on the libjxl benchmark and it almost closes the
performance gap between Clang and GCC while not requiring excessive
inlining and thus code growth.
The patch disallows creation of replacements for such aggregates which
are also accessed with a precision smaller than their size because I
have observed that this led to excessive zero-extending of data
leading to slow-downs of perlbench (on some CPUs). Apart from this
case I have not noticed any regressions, at least not so far.
Gimple call argument flags can tell if an argument is unused (and then
we do not need to generate any statements for it) or if it is not
written to and then we do not need to generate statements loading
replacements from the original aggregate after the call statement.
Unfortunately, we cannot symmetrically use flags that an aggregate is
not read because to avoid re-constructing the aggregate before the
call because flags don't tell which what parts of aggregates were not
written to, so we load all replacements, and so all need to have the
correct value before the call.
This version of the patch also takes care to avoid attempts to modify
abnormal edges, something which was missing in the previosu version.
gcc/ChangeLog:
2023-11-23 Martin Jambor <mjambor@suse.cz>
PR middle-end/109849
* tree-sra.cc (passed_by_ref_in_call): New.
(sra_initialize): Allocate passed_by_ref_in_call.
(sra_deinitialize): Free passed_by_ref_in_call.
(create_access): Add decl pool candidates only if they are not
already candidates.
(build_access_from_expr_1): Bail out on ADDR_EXPRs.
(build_access_from_call_arg): New function.
(asm_visit_addr): Rename to scan_visit_addr, change the
disqualification dump message.
(scan_function): Check taken addresses for all non-call statements,
including phi nodes. Process all call arguments, including the static
chain, build_access_from_call_arg.
(maybe_add_sra_candidate): Relax need_to_live_in_memory check to allow
non-escaped local variables.
(sort_and_splice_var_accesses): Disallow smaller-than-precision
replacements for aggregates passed by reference to functions.
(sra_modify_expr): Use a separate stmt iterator for adding satements
before the processed statement and after it.
(enum out_edge_check): New type.
(abnormal_edge_after_stmt_p): New function.
(sra_modify_call_arg): New function.
(sra_modify_assign): Adjust calls to sra_modify_expr.
(sra_modify_function_body): Likewise, use sra_modify_call_arg to
process call arguments, including the static chain.
Tobias Burnus [Fri, 24 Nov 2023 14:31:08 +0000 (15:31 +0100)]
OpenMP: Add -Wopenmp and use it
The new warning has two purposes: First, it makes clearer to the
user that it is about OpenMP and, secondly and more importantly,
it permits to use -Wno-openmp.
The newly added -Wopenmp is enabled by default and replaces the
'0' (always warning) in several OpenMP-related warning calls.
For code shared with OpenACC, it only uses OPT_Wopenmp for
'flag_openmp | flag_openmp_simd'.
* lang.opt (Wopenmp): Add, enabled by dafault and documented in C.
* openmp.cc (gfc_match_omp_declare_target, resolve_positive_int_expr,
resolve_nonnegative_int_expr, resolve_omp_clauses,
gfc_resolve_omp_do_blocks): Use OPT_Wopenmp with gfc_warning{,_now}.
Richard Earnshaw [Mon, 20 Nov 2023 14:04:17 +0000 (14:04 +0000)]
arm: libgcc: provide implementations of __sync_synchronize
Prior to Armv6 there was no architected method to synchronize data
across processors. Armv6 saw the first introduction of
multi-processor support, using a CP15 operation; but this was
deprecated in Armv7 and is not supported on m-profile devices of any
form. Armv7 (and armv6-m) and later support data synchronization via
the DMB instruction.
This all leads to difficulties when linking programs as the user
generally needs to know which synchronization method is needed, but
there seems no easy way around this, when there are no OS-related
primitives available.
I've addressed this by adding multiple variants of __sync_synchronize
to libgcc, one for each of the above use cases. I've named these
__sync_synchronize_none, __sync_synchronize_cp15dmb and
__sync_synchronize_dmb. I've also added three specs files that can be
used to direct the linker to pick the appropriate implementation.
Using specs fragments for this is preferable to directing the user to
directly use --defsym as the latter has to be placed at the correct
position on the command line to be effective and the spec rule ensures
this automatically.
I've also added a default implementation of __sync_synchronize. The
default implementation will use DMB if that is available in the target
ISA, or fall back to a nul-implementation if it isn't. In the latter
case it will cause the linker (GNU LD) to emit a warning that
specifies how to pick a specific implementation. I've chosen not to
permit this default to use the CP15 solution as that has been
deprecated.
libgcc:
* config.host (arm*-*-eabi* | arm*-*-rtems*):
Add arm/t-sync to the makefile rules.
* config/arm/lib1funcs.S (__sync_synchronize_none)
(__sync_synchronize_cp15dmb, __sync_synchronize_dmb)
(__sync_synchronize): New functions.
* config/arm/t-sync: New file.
* config/arm/sync-none.specs: Likewise.
* config/arm/sync-dmb.specs: Likewise.
* config/arm/sync-cp15dmb.specs: Likewise.
Tobias Burnus [Fri, 24 Nov 2023 14:10:49 +0000 (15:10 +0100)]
OpenMP: Accept argument to depobj's destroy clause
Since OpenMP 5.2, the destroy clause takes an depend argument as argument;
for the depobj directive, it the new argument is optional but, if present,
it must be identical to the directive's argument.
gcc/c/ChangeLog:
* c-parser.cc (c_parser_omp_depobj): Accept optionally an argument
to the destroy clause.
gcc/cp/ChangeLog:
* parser.cc (cp_parser_omp_depobj): Accept optionally an argument
to the destroy clause.
gcc/fortran/ChangeLog:
* openmp.cc (gfc_match_omp_depobj): Accept optionally an argument
to the destroy clause.
libgomp/ChangeLog:
* libgomp.texi (5.2 Impl. Status): An argument to the destroy clause
is now supported.
gcc/testsuite/ChangeLog:
* c-c++-common/gomp/depobj-3.c: New test.
* gfortran.dg/gomp/depobj-3.f90: New test.
By [basic.link] p3.2.1, a non-template non-volatile const-qualified
variable is not necessarily internal linkage in a module declaration,
and rather may have module linkage (or external linkage if it is
exported, see p4.8).
PR c++/99232
gcc/cp/ChangeLog:
* decl.cc (grokvardecl): Don't mark variables attached to
modules as internal.
gcc/testsuite/ChangeLog:
* g++.dg/modules/pr99232_a.C: New test.
* g++.dg/modules/pr99232_b.C: New test.
Juzhe-Zhong [Fri, 24 Nov 2023 08:34:28 +0000 (16:34 +0800)]
RISC-V: Fix inconsistency among all vectorization hooks
This patches 200+ ICEs exposed by testing with rv64gc_zve64d.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112694
The rootcause is we disallow poly (1,1) size vectorization in preferred_simd_mode.
with this following code:
- if (TARGET_MIN_VLEN < 128 && TARGET_MAX_LMUL < RVV_M2)
- return word_mode;
However, we allow poly (1,1) size in hook:
TARGET_VECTORIZE_RELATED_MODE
TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES
And also enables it in all vectorization patterns.
I was adding this into preferred_simd_mode because poly (1,1) size mode will cause
ICE in can_duplicate_and_interleave_p.
So, the alternative approach we need to block poly (1,1) size in both TARGET_VECTORIZE_RELATED_MODE
and TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES hooks and all vectorization patterns.
which is ugly approach and too much codes change.
Now, after investivation, I find it's nice that loop vectorizer can automatically block poly (1,1)
size vector in interleave vectorization with this commit:
https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=730909fa858bd691095bc23655077aa13b7941a9
So, we don't need to worry about ICE in interleave vectorization and allow poly (1,1) size vector
in vectorization which fixes 200+ ICEs in zve64d march.
Our system.h and configure.ac try to accommodate valgrind-3.1, but it is
more than 15 years old at this point. As Valgrind-based checking is a
developer-oriented feature, drop the compatibility stuff and streamline
the detection.
When top-level configure has either --enable-checking=valgrind or
--enable-valgrind-annotations, we want to activate a couple of workarounds
in libcpp. They do not use anything from the Valgrind API, so just
delete all detection.
Jakub Jelinek [Fri, 24 Nov 2023 11:12:20 +0000 (12:12 +0100)]
i386: Fix ICE during cbranchv16qi4 expansion [PR112681]
The following testcase ICEs, because cbranchv16qi4 expansion calls
ix86_expand_branch with op1 being a pre-AVX unaligned memory and
ix86_expand_branch emits a xorv16qi3 instruction without making sure
the operand predicates are satisfied.
While I could manually check if the argument (or both?) doesn't
match vector_operand predicate (apparently this one or bcst_vector_operand
is used in all integral 16+ bytes *xorv*3 instructions) force it into a
register, but as all gen_xorv*3 expanders call
ix86_expand_vector_logical_operator, it seems easier to just call that
function which ensures the right thing happens. Calling the individual
gen_xorv*3 functions would mean ugly switch on the modes and using high
level expand_simple_binop here seems too high level to me.
2023-11-24 Jakub Jelinek <jakub@redhat.com>
PR target/112681
* config/i386/i386-expand.cc (ix86_expand_branch): Use
ix86_expand_vector_logical_operator to expand vector XOR rather than
gen_rtx_SET on gen_rtx_XOR.
Alex Coplan [Wed, 1 Nov 2023 21:45:39 +0000 (21:45 +0000)]
rtl-ssa: Add some helpers for removing accesses
This adds some helpers to access-utils.h for removing accesses from an
access_array. This is needed by the upcoming aarch64 load/store pair
fusion pass.
gcc/ChangeLog:
* rtl-ssa/access-utils.h (filter_accesses): New.
(remove_regno_access): New.
(check_remove_regno_access): New.
* rtl-ssa/accesses.cc (rtl_ssa::remove_note_accesses_base): Use
new filter_accesses helper.
Alex Coplan [Sat, 16 Sep 2023 08:23:52 +0000 (09:23 +0100)]
rtl-ssa: Support for inserting new insns
The upcoming aarch64 load pair pass needs to form store pairs, and can
re-order stores over loads when alias analysis determines this is safe.
In the case that both mem defs have uses in the RTL-SSA IR, and both
stores require re-ordering over their uses, we represent that as
(tentative) deletion of the original store insns and creation of a new
insn, to prevent requiring repeated re-parenting of uses during the
pass. We then update all mem uses that require re-parenting in one go
at the end of the pass.
To support this, RTL-SSA needs to handle inserting new insns (rather
than just changing existing ones), so this patch adds support for that.
New insns (and new accesses) are temporaries, allocated above a temporary
obstack_watermark, such that the user can easily back out of a change without
awkward bookkeeping.
gcc/ChangeLog:
* rtl-ssa/accesses.cc (function_info::create_set): New.
* rtl-ssa/accesses.h (access_info::is_temporary): New.
* rtl-ssa/changes.cc (move_insn): Handle new (temporary) insns.
(function_info::finalize_new_accesses): Handle new/temporary
user-created accesses.
(function_info::apply_changes_to_insn): Ensure m_is_temp flag
on new insns gets cleared.
(function_info::change_insns): Handle new/temporary insns.
(function_info::create_insn): New.
* rtl-ssa/changes.h (class insn_change): Make function_info a
friend class.
* rtl-ssa/functions.h (function_info): Declare new entry points:
create_set, create_insn. Declare new change_alloc helper.
* rtl-ssa/insns.cc (insn_info::print_full): Identify temporary insns in
dump.
* rtl-ssa/insns.h (insn_info): Add new m_is_temp flag and accompanying
is_temporary accessor.
* rtl-ssa/internals.inl (insn_info::insn_info): Initialize m_is_temp to
false.
* rtl-ssa/member-fns.inl (function_info::change_alloc): New.
* rtl-ssa/movement.h (restrict_movement_for_defs_ignoring): Add
handling for temporary defs.
Jakub Jelinek [Fri, 24 Nov 2023 10:32:28 +0000 (11:32 +0100)]
match.pd: Avoid simplification into invalid BIT_FIELD_REFs [PR112673]
The following testcase is lowered by the bitint lowering pass, then
vectorizer vectorizes one of the loops in it, so we have
vect__18.6_34 = VIEW_CONVERT_EXPR<vector(4) unsigned long>(x_35(D));
_8 = BIT_FIELD_REF <vect__18.6_34, 64, 0>;
...
_18 = BIT_FIELD_REF <vect__18.6_34, 64, 64>;
etc. where x_35(D) is _BitInt(256) argument. That is valid BIT_FIELD_REF,
the first argument is a vector and it extracts the vector elements from it.
Then comes forwprop4 and simplifies that using match.pd into
_8 = (unsigned long) x_35(D);
...
_18 = BIT_FIELD_REF <x_35(D), 64, 64>;
and tree-cfg verification ICEs on the latter (though, even the first cast
is kind of undesirable after bitint lowering, we want large/huge bitints
lowered). The ICE is because if BIT_FIELD_REFs first argument has
INTEGRAL_TYPE_P, we require type_has_mode_precision_p, but that is not the
case of _BitInt(256), it has BLKmode.
The following patch fixes it by doing the BIT_FIELD_REF with VCE to
BIT_FIELD_REF simplification only if the result is valid.
2023-11-24 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/112673
* match.pd (bit_field_ref (vce @0) -> bit_field_ref @0): Only simplify
if either @0 doesn't have scalar integral type or if it has mode
precision.
Jakub Jelinek [Fri, 24 Nov 2023 10:30:30 +0000 (11:30 +0100)]
lower-bitint: Lower FLOAT_EXPR from BITINT_TYPE INTEGER_CST [PR112679]
The bitint lowering pass only does something if it sees BITINT_TYPE (medium,
large, huge) SSA_NAMEs. In the past I've already ran into one special case
where the above doesn't work well, if there is a store of medium/large/huge
BITINT_TYPE INTEGER_CST into memory, there might not be any BITINT_TYPE
SSA_NAMEs in the function, yet we need to lower. This has been solved by
also checking for SSA_NAME_IS_VIRTUAL_OPERAND if at the vdef there isn't
such a store (the whole intent is make the pass as cheap as possible in the
currently very likely case that the IL doesn't have any BITINT_TYPEs at
all).
And the following testcase shows a similar problem. With -frounding-math
we don't fold some of FLOAT_EXPRs with INTEGER_CST operands, and if those
INTEGER_CSTs are medium/large/huge BITINT_TYPEs, we need to either cast
the INTEGER_CST to corresponding INTEGER_TYPE (for medium) or lower to
internal fn call which is later turned into libgcc call (for large/huge).
The following patch does that, but of course admittedly this discovery
of stores and FLOAT_EXPRs means we already look through quite a few
SSA_NAME_DEF_STMTs even when BITINT_TYPEs never appear.
2023-11-23 Jakub Jelinek <jakub@redhat.com>
PR middle-end/112679
* gimple-lower-bitint.cc (gimple_lower_bitint): Also stop first loop on
floating point SSA_NAME set in FLOAT_EXPR assignment from BITINT_TYPE
INTEGER_CST. Set has_large_huge for those if that BITINT_TYPE is large
or huge. Set kind to such FLOAT_EXPR assignment rhs1 BITINT_TYPE's kind.
Haochen Gui [Fri, 24 Nov 2023 09:14:46 +0000 (17:14 +0800)]
Clean up by_pieces_ninsns
The by pieces compare can be implemented by overlapped operations. So
it should be taken into consideration when doing the adjustment for
overlap operations. The mode returned from
widest_fixed_size_mode_for_size is already checked with mov_optab in
by_pieces_mode_supported_p called by widest_fixed_size_mode_for_size.
So it is no need to check mov_optab again in by_pieces_ninsns. The
patch fixes these issues.
gcc/
* expr.cc (by_pieces_ninsns): Include by pieces compare when
do the adjustment for overlap operations. Replace mov_optab
checks with gcc assertion.
Jakub Jelinek [Fri, 24 Nov 2023 07:54:40 +0000 (08:54 +0100)]
lower-bitint: Fix up -fnon-call-exceptions bit-field load lowering [PR112668]
As the following testcase shows, there are some bugs in the
-fnon-call-exceptions bit-field load lowering. In particular, there
is a case where we want to emit a load early in the initialization
(before m_init_gsi) and because that load might throw exception, need
to split block after the load so that it has an EH edge.
Now, across this splitting, we have m_init_gsi, save_gsi (something
we put back into m_gsi afterwards) statement iterators and m_preheader_bb
which is used to determine the pre-header edge of a loop (if any).
As the testcase shows, both of these statement iterators and m_preheader_bb
as well need adjustments if the block was split. If the stmt iterators
refer to a statement, they need to be updated so that if the statement is
in the bb after the split gsi_bb and gsi_seq is updated, otherwise they
ought to be the start of the new (second) bb.
Similarly, m_preheader_bb should be updated to the second bb if it was
the first before. Other spots where we insert something before m_init_gsi
don't split blocks in there and are fine.
The m_gsi iterator is normal iterator to insert statements before it,
so gsi_end_p means insert statements at the end of basic block.
m_init_gsi is on the other side an iterator after which statements should be
inserted (so gsi_end_p means insert statements at the start of basic block
after labels), but the whole pass is written for insertion of statements before
iterators, so when in 3 spots it wants to insert something after m_init_gsi,
it saves current iterator to save_gsi and sets m_gsi to gsi_after_labels
if m_init_gsi was gsi_end_p, or to the next statement. But it actually wasn't
updating m_init_gsi back when switching to normal iterator, this patch changes
that such that further statements after m_init_gsi will appear after the
set of statements inserted before m_init_gsi.
Finally, the pass had a couple of places where it wanted to create a gsi_end_p
iterator for a particular basic block, instead of doing
m_gsi = gsi_last_bb (bb); if (!gsi_end_p (m_gsi)) gsi_next (&m_gsi);
the pass now uses new m_gsi = gsi_end_bb (bb) function.
2023-11-24 Jakub Jelinek <jakub@redhat.com>
PR middle-end/112668
* gimple-iterator.h (gsi_end, gsi_end_bb): New inline functions.
* gimple-lower-bitint.cc (bitint_large_huge::handle_cast): After
temporarily adding statements after m_init_gsi, update m_init_gsi
such that later additions after it will be after the added statements.
(bitint_large_huge::handle_load): Likewise. When splitting
gsi_bb (m_init_gsi) basic block, update m_preheader_bb if needed
and update saved m_gsi as well if needed.
(bitint_large_huge::lower_mergeable_stmt,
bitint_large_huge::lower_comparison_stmt,
bitint_large_huge::lower_mul_overflow,
bitint_large_huge::lower_bit_query): Use gsi_end_bb.
Jakub Jelinek [Fri, 24 Nov 2023 07:44:28 +0000 (08:44 +0100)]
tree: Fix up try_catch_may_fallthru [PR112619]
The following testcase ICEs with -std=c++98 since r14-5086 because
block_may_fallthru is called on a TRY_CATCH_EXPR whose second operand
is a MODIFY_EXPR rather than STATEMENT_LIST, which try_catch_may_fallthru
apparently expects.
I've been wondering whether that isn't some kind of FE bug and whether
there isn't some unwritten rule that second operand of TRY_CATCH_EXPR
must be a STATEMENT_LIST. Looking at the FEs, the C++ FE uses mostly its
own trees, TRY_BLOCK (TRY_CATCH_EXPR replacement) with HANDLER in it (CATCH_EXPR
replacement) - but HANDLER can be immediate second operand rather than nested
in STATEMENT_LIST, EH_SPEC_BLOCK (this one stands for both TRY_CATCH_EXPR
and EH_FILTER_EXPR in its second argument); both of these are only replaced
by the generic trees during gimplification though, so will unlikely be seen
by block_may_fallthru; and then CLEANUP_STMT, which is genericized
into TRY_CATCH_EXPR with non-CATCH_EXPR/EH_FILTER_EXPR in its body (this is
the one that causes the ICE on this testcase).
The Go and Rust FEs create TRY_CATCH_EXPR with CATCH_EXPR immediately in its
second argument (but either are unlucky that block_may_fallthru isn't called
or the body can always fallthru, or latent ICE), while the D FE most likely
hit this ICE and attempts to work around it, by checking at TRY_CATCH_EXPR
creation time if the second argument from pop_stmt_list is STATEMENT_LIST and
if not, forcefully wraps it into a STATEMENT_LIST.
Unfortunately, I don't see an easy way to create an artificial tree iterator
from just a single tree statement, so the patch duplicates what the loops
later do (after all, it is very simple, just didn't want to duplicate
also the large comments explaning it, so the 3 See below. comments).
2023-11-24 Jakub Jelinek <jakub@redhat.com>
PR c++/112619
* tree.cc (try_catch_may_fallthru): If second operand of
TRY_CATCH_EXPR is not a STATEMENT_LIST, handle it as if it was a
STATEMENT_LIST containing a single statement.
Richard Biener [Thu, 23 Nov 2023 08:49:59 +0000 (09:49 +0100)]
tree-optimization/112344 - relax final value-replacement fix
The following tries to reduce the number of cases we use an unsigned
type for the addition when we know the original signed increment was
OK which is when the total unsigned increment computed fits the signed
type as well.
This fixes the observed testsuite fallout.
PR tree-optimization/112344
* tree-chrec.cc (chrec_apply): Only use an unsigned add
when the overall increment doesn't fit the signed type.
Nathaniel Shead [Mon, 13 Nov 2023 09:11:15 +0000 (20:11 +1100)]
c++: Support lambdas in static template member initialisers [PR107398]
The testcase noted in the PR fails because the context of the lambda is
not in namespace scope, but rather in class scope. This patch removes
the assertion that the context must be a namespace and ensures that
lambdas in class scope still get the correct merge_kind.
PR c++/107398
gcc/cp/ChangeLog:
* module.cc (trees_out::get_merge_kind): Handle lambdas in class
scope.
(maybe_key_decl): Remove assertion and fix whitespace.
gcc/testsuite/ChangeLog:
* g++.dg/modules/lambda-6_a.C: New test.
* g++.dg/modules/lambda-6_b.C: New test.
Haochen Jiang [Thu, 23 Nov 2023 02:03:17 +0000 (10:03 +0800)]
i386: Fix AVX512 and AVX10 option issues
gcc/ChangeLog:
PR target/112643
* config/i386/driver-i386.cc (check_avx10_avx512_features):
Renamed to ...
(check_avx512_features): this and remove avx10 check.
(host_detect_local_cpu): Never append -mno-avx10.1-{256,512} to
avoid emitting warnings when building GCC with native arch.
* config/i386/i386-builtin.def (BDESC): Add missing AVX512VL for
128/256 bit builtin for AVX512VP2INTERSECT.
* config/i386/i386-options.cc (ix86_option_override_internal):
Also check whether the AVX512 flags is set when trying to reset.
* config/i386/i386.h
(PTA_SKYLAKE_AVX512): Add missing PTA_EVEX512.
(PTA_ZNVER4): Ditto.
Nathaniel Shead [Sun, 12 Nov 2023 11:49:45 +0000 (22:49 +1100)]
c++: check mismatching exports for class tags [PR98885]
Checks for exporting a declaration that was previously declared as not
exported is implemented in 'duplicate_decls', but this doesn't handle
declarations of classes. This patch adds these checks and slightly
adjusts the associated error messages for clarity.
PR c++/98885
gcc/cp/ChangeLog:
* decl.cc (duplicate_decls): Adjust error message.
(xref_tag): Adjust error message. Check exporting decl that is
already declared as non-exporting.
gcc/testsuite/ChangeLog:
* g++.dg/modules/export-1.C: Adjust error messages. Remove
xfails for working case. Add new test case.
Tests with keys that match both PASS, FAIL (or now
optionally XPASS), count as fail. XPASSes were previously
ignored. Handling them as FAIL seems the most useful
alternative, but not counting XPASSes may be deliberate.
It's also a matter of compatibility, so make it optional.
Attempts to use --handle-xpass-as-fail was previously
flagged as a usage error. If you pass it now, on state with
previous mixed XPASS and PASS results but doesn't change in
this run, the XPASS is discovered as a (new) regression.
For new XPASSing tests, it's handled as a new FAIL.
* btest-gcc.sh (--handle-xpass-as-fail): New option.
This is a long-standing bug: passing "-j --add-passes-despite-regression"
or "--add-passes-despite-regression -j" caused the second option to be
treated as TARGET; the first non-option parameter.
Iain Sandoe [Thu, 23 Nov 2023 09:44:55 +0000 (09:44 +0000)]
testsuite, lib: Re-allow mulitple function start labels.
The change applied in r14-5760-g2a46e0e7e20 changed the behaviour of
functions with assembly like:
bar:
__acle_se_bar:
Where both bar and __acle_se_bar are globals refering to the same
function body. The old behaviour overrides 'bar' with '__acle_se_bar'
and the scan tests for that label.
The change here re-allows the override.
Case like this are not legal Mach-O (where two global symbols cannot
have the same address in the assembler output). However, given the
constraints on the Mach-O scanning, it does not seem that it is
necessary to skip the change (any incorrect case should be easily
evident in the assembler).
gcc/testsuite/ChangeLog:
* lib/scanasm.exp: Allow multiple function start symbols,
taking the last as the function name.
Harald Anlauf [Wed, 22 Nov 2023 19:57:59 +0000 (20:57 +0100)]
Fortran: restrictions on integer arguments to SYSTEM_CLOCK [PR112609]
Fortran 2023 added restrictions on integer arguments to SYSTEM_CLOCK to
have a decimal exponent range at least as large as a default integer,
and that all integer arguments have the same kind type parameter.
gcc/fortran/ChangeLog:
PR fortran/112609
* check.cc (gfc_check_system_clock): Add checks on integer arguments
to SYSTEM_CLOCK specific to F2023.
* error.cc (notify_std_msg): Adjust to handle new features added
in F2023.
* gfortran.texi (_gfortran_set_options): Document GFC_STD_F2023_DEL,
remove obsolete option GFC_STD_F2008_TS and fix enumeration values.
* libgfortran.h (GFC_STD_F2023_DEL): Add and use in GFC_STD_OPT_F23.
* options.cc (set_default_std_flags): Add GFC_STD_F2023_DEL.
Jonathan Wakely [Tue, 19 Sep 2023 12:23:13 +0000 (13:23 +0100)]
libstdc++: Define std::ranges::to for C++23 (P1206R7) [PR111055]
This adds the std::ranges::to functions for C++23. The rest of P1206R7
is not yet implemented, i.e. the new constructors taking the
std::from_range tag, and the new insert_range, assign_range, etc. member
functions. std::ranges::to works with the standard containers even
without the new constructors, so this is useful immediately.
The __cpp_lib_ranges_to_container feature test macro can be defined now,
because that only indicates support for the changes in <ranges>, which
are implemented by this patch. The __cpp_lib_containers_ranges macro
will be defined once all containers support the new member functions.
libstdc++-v3/ChangeLog:
PR libstdc++/111055
* include/bits/ranges_base.h (from_range_t): Define new tag
type.
(from_range): Define new tag object.
* include/bits/version.def (ranges_to_container): Define.
* include/bits/version.h: Regenerate.
* include/std/ranges (ranges::to): Define.
* testsuite/std/ranges/conv/1.cc: New test.
* testsuite/std/ranges/conv/2_neg.cc: New test.
* testsuite/std/ranges/conv/version.cc: New test.
Jonathan Wakely [Thu, 23 Nov 2023 14:34:59 +0000 (14:34 +0000)]
libstdc++: Fix access error in __gnu_test::uneq_allocator
The operator== function is only a friend of the LHS argument, so cannot
access the private member of the RHS argument. Use the public accessor
instead.
libstdc++-v3/ChangeLog:
* testsuite/util/testsuite_allocator.h (uneq_allocator): Fix
equality operator for heterogeneous comparisons.
Marek Polacek [Tue, 1 Aug 2023 21:30:13 +0000 (17:30 -0400)]
gcc: Introduce -fhardened
In <https://gcc.gnu.org/pipermail/gcc-patches/2023-August/628748.html>
I proposed -fhardened, a new umbrella option that enables a reasonable set
of hardening flags. The read of the room seems to be that the option
would be useful. So here's a patch implementing that option.
-fhardened will not override options that were specified on the command line
(before or after -fhardened). For example,
-D_FORTIFY_SOURCE=1 -fhardened
means that _FORTIFY_SOURCE=1 will be used. Similarly,
-fhardened -fstack-protector
will not enable -fstack-protector-strong.
Currently, -fhardened is only supported on GNU/Linux.
In DW_AT_producer it is reflected only as -fhardened; it doesn't expand
to anything. This patch provides -Whardened, enabled by default, which
warns when -fhardened couldn't enable a particular option. I think most
often it will say that _FORTIFY_SOURCE wasn't enabled because optimization
were not enabled.
gcc/c-family/ChangeLog:
* c-opts.cc: Include "target.h".
(c_finish_options): Maybe cpp_define _FORTIFY_SOURCE
and _GLIBCXX_ASSERTIONS.
gcc/ChangeLog:
* common.opt (Whardened, fhardened): New options.
* config.in: Regenerate.
* config/bpf/bpf.cc: Include "opts.h".
(bpf_option_override): If flag_stack_protector_set_by_fhardened_p, do
not inform that -fstack-protector does not work.
* config/i386/i386-options.cc (ix86_option_override_internal): When
-fhardened, maybe enable -fcf-protection=full.
* config/linux-protos.h (linux_fortify_source_default_level): Declare.
* config/linux.cc (linux_fortify_source_default_level): New.
* config/linux.h (TARGET_FORTIFY_SOURCE_DEFAULT_LEVEL): Redefine.
* configure: Regenerate.
* configure.ac: Check if the linker supports '-z now' and '-z relro'.
Check if -fhardened is supported on $target_os.
* doc/invoke.texi: Document -fhardened and -Whardened.
* doc/tm.texi: Regenerate.
* doc/tm.texi.in (TARGET_FORTIFY_SOURCE_DEFAULT_LEVEL): Add.
* gcc.cc (driver_handle_option): Remember if any link options or -static
were specified on the command line.
(process_command): When -fhardened, maybe enable -pie and
-Wl,-z,relro,-z,now.
* opts.cc (flag_stack_protector_set_by_fhardened_p): New global.
(finish_options): When -fhardened, enable
-ftrivial-auto-var-init=zero and -fstack-protector-strong.
(print_help_hardened): New.
(print_help): Call it.
* opts.h (flag_stack_protector_set_by_fhardened_p): Declare.
* target.def (fortify_source_default_level): New target hook.
* targhooks.cc (default_fortify_source_default_level): New.
* targhooks.h (default_fortify_source_default_level): Declare.
* toplev.cc (process_options): When -fhardened, enable
-fstack-clash-protection. If flag_stack_protector_set_by_fhardened_p,
do not warn that -fstack-protector not supported for this target.
Don't enable -fhardened when !HAVE_FHARDENED_SUPPORT.
gcc/testsuite/ChangeLog:
* gcc.misc-tests/help.exp: Test -fhardened.
* c-c++-common/fhardened-1.S: New test.
* c-c++-common/fhardened-1.c: New test.
* c-c++-common/fhardened-10.c: New test.
* c-c++-common/fhardened-11.c: New test.
* c-c++-common/fhardened-12.c: New test.
* c-c++-common/fhardened-13.c: New test.
* c-c++-common/fhardened-14.c: New test.
* c-c++-common/fhardened-15.c: New test.
* c-c++-common/fhardened-2.c: New test.
* c-c++-common/fhardened-3.c: New test.
* c-c++-common/fhardened-4.c: New test.
* c-c++-common/fhardened-5.c: New test.
* c-c++-common/fhardened-6.c: New test.
* c-c++-common/fhardened-7.c: New test.
* c-c++-common/fhardened-8.c: New test.
* c-c++-common/fhardened-9.c: New test.
* gcc.target/i386/cf_check-6.c: New test.
Jose E. Marchesi [Wed, 22 Nov 2023 14:32:17 +0000 (15:32 +0100)]
libgcc: mark __hardcfr_check_fail as always_inline
The function __hardcfr_check_fail in hardcfr.c is internal and static
inline. It receives many arguments, which require more than five
registers to be passed in bpf-none-unknown targets. BPF is limited to
that number of registers to pass arguments, and therefore libgcc fails
to build in that target. This patch marks the function with the
always_inline attribute, fixing the bpf build.
Tested in bpf-unknown-none target and x86_64-linux-gnu host.
libgcc/ChangeLog:
* hardcfr.c (__hardcfr_check_fail): Mark as always_inline.
testsuite: Fix subexpressions with `scan-assembler-times'
We have an issue with `scan-assembler-times' handling expressions using
subexpressions as produced by capturing parentheses `()' in an odd way,
and one that is inconsistent with `scan-assembler', `scan-assembler-not',
etc. The problem comes from calling `regexp' with `-inline -all', which
causes a list to be returned that would otherwise be placed in match
variables.
in a test case and there is a lone `foo' present in output being matched,
then our invocation of `regexp -inline -all' in `scan-assembler-times'
will return:
{ foo } foo
and that in turn will confuse our match count calculation as `llength'
will return 2 rather than 1, making the test fail even though `foo' was
only actually matched once.
It seems unclear why we chose to call `regexp' in such an odd way in the
first place just to figure out the number of matches. The first version
of TCL that supports the `-all' option to `regexp' is 8.3, and according
to its documentation[1][2] `regexp' already returns the number of matches
found whenever `-all' has been used *unless* `-inline' has also been used.
Remove the `-inline' option then along with the `llength' invocation.
Christophe Lyon [Thu, 23 Nov 2023 14:30:10 +0000 (14:30 +0000)]
arm: [MVE intrinsics] Add default clause to full_width_access::memory_vector_mode
My recent commit 0c2037d9d93a8f768cb11698ff794278246bb31f added a
switch statement lacking a default clause, leading to warnings or
errors when building with --enable-werror-always.
Uros Bizjak [Thu, 23 Nov 2023 14:45:59 +0000 (15:45 +0100)]
i386: Fix ICE with -mforce-indirect-call and -fsplit-stack [PR89316]
With the above two options, use a temporary register regno (as returned
from split_stack_prologue_scratch_regno) as an indirect call scratch
register to hold __morestack function address. On 64-bit targets, two
temporary registers are always available, so load the function addres in
%r11 and call __morestack_large_model with its one-argument-register value
rn %r10. On 32-bit targets, bail out with a "sorry" if the temporary
register can not be obtained.
On 32-bit targets, also emit PIC sequence that re-uses the obtained indirect
call scratch register before moving the function address to it. We can
not set up %ebx PIC register in this case, but __morestack is prepared
for this situation and sets it up by itself.
PR target/89316
gcc/ChangeLog:
* config/i386/i386.cc (ix86_expand_split_stack_prologue): Obtain
scratch regno when flag_force_indirect_call is set. On 64-bit
targets, call __morestack_large_model when flag_force_indirect_call
is set and on 32-bit targets with -fpic, manually expand PIC sequence
to call __morestack. Move the function address to an indirect
call scratch register.
gcc/testsuite/ChangeLog:
* g++.target/i386/pr89316.C: New test.
* gcc.target/i386/pr112605-1.c: New test.
* gcc.target/i386/pr112605-2.c: New test.
* gcc.target/i386/pr112605.c: New test.
Juergen Christ [Mon, 20 Nov 2023 08:13:10 +0000 (09:13 +0100)]
s390: implement flags output
Implement flags output for inline assemblies. Only use one output constraint
that captures the whole condition code. No breakout into different condition
codes is allowed. Also, only one condition code variable is allowed.
Add further logic to canonicalize various cases where we combine different
cases of possible condition codes.
Juergen Christ [Mon, 20 Nov 2023 08:12:18 +0000 (09:12 +0100)]
s390: Fix ICE in testcase pr89233
When using GNU vector extensions, an access outside of the vector size
caused an ICE on s390. Fix this by aligning with the vec_extract
builtin, i.e., computing constant index modulo number of lanes.
Di Zhao [Thu, 9 Nov 2023 07:06:37 +0000 (15:06 +0800)]
swap ops in reassoc to reduce cross backedge FMA
Previously for ops.length >= 3, when FMA is present, we don't
rank the operands so that more FMAs can be preserved. But this
brings more FMAs with loop dependency, which lead to worse
performance on some targets.
Rank the oprands (set width=2) when:
1. avoid_fma_max_bits is set.
2. And loop dependent FMA sequence is found.
In this way, we don't have to discard all the FMA candidates
in the bad shaped sequence in widening_mul, instead we can keep
fewer FMAs without loop dependency.
With this patch, there's about 2% improvement in 510.parest_r
1-copy run on ampere1 (with "-Ofast -mcpu=ampere1 -flto
--param avoid-fma-max-bits=512").
PR tree-optimization/110279
gcc/ChangeLog:
* tree-ssa-reassoc.cc (get_reassociation_width): check
for loop dependent FMAs.
(reassociate_bb): For 3 ops, refine the condition to call
swap_ops_for_binary_stmt.
void foo (void *out, void *in, int64_t a, int64_t b)
{
v1024b v = {a,a,a,a,a,a,a,a,a,a,a,a,a,a,a,a};
v1024b v2 = {b,b,b,b,b,b,b,b,b,b,b,b,b,b,b,b};
v1024b index = *(v1024b*)in;
v1024b v3 = __builtin_shuffle (v, v2, index);
__riscv_vse64_v_i64m1 (out, (vint64m1_t)v3, 10);
}
Incorrect ASM:
foo:
li a5,31
vsetivli zero,10,e64,m1,ta,mu
vmv.v.x v2,a5
vl1re64.v v1,0(a1)
vmv.v.x v4,a2
vand.vv v1,v1,v2
vmv.v.x v3,a3
vmsgeu.vi v0,v1,16
vrgather.vv v2,v4,v1 --> AVL = VLMAX according to codes.
vadd.vi v1,v1,-16
vrgather.vv v2,v3,v1,v0.t --> AVL = VLMAX according to codes.
vse64.v v2,0(a0) --> AVL = 10 according to codes.
ret
For vrgather dest, source, index instruction, when index may has the value > the following store AVL
that is index value > 10. In this situation, the codes above will end up with:
The source vector of vrgather has undefined value on index >= AVL (which is 10 in this case).
So disable AVL propagation for vrgather instruction.
PR target/112599
PR target/112670
gcc/ChangeLog:
* config/riscv/riscv-avlprop.cc (alv_can_be_propagated_p): New function.
(vlmax_ta_p): Disable vrgather AVL propagation.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/rvv/autovec/pr112599-1.c: New test.
Jakub Jelinek [Thu, 23 Nov 2023 11:59:54 +0000 (12:59 +0100)]
expr: Fix &bitint_var handling in initializers [PR112336]
As the following testcase shows, we ICE when trying to emit ADDR_EXPR of
a bitint variable which doesn't have mode width.
The problem is in the EXTEND_BITINT stuff which makes sure we treat the
padding bits on memory reads from user bitint vars as undefined.
When expanding ADDR_EXPR on such vars inside outside of initializers,
expand_expr_addr* uses EXPAND_CONST_ADDRESS modifier and EXTEND_BITINT
does nothing, but in initializers it keeps using EXPAND_INITIALIZER
modifier. So, we need to treat EXPAND_INITIALIZER the same as
EXPAND_CONST_ADDRESS for this regard.
2023-11-23 Jakub Jelinek <jakub@redhat.com>
PR middle-end/112336
* expr.cc (EXTEND_BITINT): Don't call reduce_to_bit_field_precision
if modifier is EXPAND_INITIALIZER.
Jonathan Wakely [Wed, 22 Nov 2023 21:24:08 +0000 (21:24 +0000)]
c++: Require C++11 for g++.dg/opt/pr110879.C [PR110879]
The _M_realloc_insert member does not have the trivial relocation
optimization for C++98, which seems to be why the _M_end_of_storage
member does not get optimized away. Make this test unsupported for
C++98.
gcc/testsuite/ChangeLog:
PR libstdc++/110879
* g++.dg/opt/pr110879.C: Require C++11 or later.
Jakub Jelinek [Thu, 23 Nov 2023 09:12:30 +0000 (10:12 +0100)]
c: Add __builtin_stdc_* builtins
As discussed in the
https://sourceware.org/pipermail/libc-alpha/2023-November/152756.html
thread, including e.g.
https://sourceware.org/pipermail/libc-alpha/2023-November/152795.html
patch, while one can use the new __builtin_{clz,ctz,popcount}g builtins
to implement the stdbit.h type-generic macros, there are certain problems
with that implementation if those macros must be usable outside of
function bodies (e.g. int a = sizeof (stdc_bit_floor (0ULL));), must not
evaluate their arguments multiple times and especially for deep stdc_*
macro nesting don't expand the argument more than once. Plus ideally are
usable in constant expressions for all the types if they have constant
arguments. The above second URL satisfies it all but the last two (the
last one satisfies for many of them). While we could get away with just
adding __biultin_stdc_bit_{ceil,floor,width} which are complicated and
2 further extensions (some way to say that __builtin_c{l,t}zg should
imply bit precision of the first argument for the second argument without
using __builtin_popcountg ((__typeof (x)) -1) in there because that
causes another expansion of the macro argument and say __builtin_bit_complement
type-generic builtin which would be like (__typeof (x)) ~(x)), it was decided
we want to implement builtins for all the stdc type-generic macros.
As we are close to running out of 8-bit enum rid (when adding the 14 new
RID_* we have 7 too many), this patch implements those 14 keywords using
a single RID_BUILTIN_STDC and simply in the rare case this is being
parsed check values of 1-2 characters from the builtin names to see which
one it is.
Richard Biener [Thu, 23 Nov 2023 07:54:56 +0000 (08:54 +0100)]
middle-end/32667 - document cpymem and memcpy exact overlap requirement
The following amends the cpymem documentation to mention that exact
overlap needs to be handled gracefully, also noting that the target
runtime is expected to behave the same way where -ffreestanding
docs mention the set of routines required.
PR middle-end/32667
* doc/md.texi (cpymem): Document that exact overlap of source
and destination needs to work.
* doc/standards.texi (ffreestanding): Mention memcpy is required
to handle the exact overlap case.
The following patch implements the user generated static_assert messages next
to string literals.
As I wrote already in the PR, in addition to looking through the paper
I looked at the clang++ testcase for this feature implemented there from
paper's author and on godbolt played with various parts of the testcase
coverage below, and there are some differences between what the patch
implements and what clang++ implements.
The first is that clang++ diagnoses if M.size () or M.data () methods
are present, but aren't constexpr; while the paper introduction talks about
that, the standard wording changes don't seem to require that, all they say
is that those methods need to exist (assuming accessible and the like)
and be implicitly convertible to std::size_t or const char *, but rest is
only if the static assertion fails. If there is intent to change that
wording, the question is how far to go, e.g. while M.size () could be
constexpr, they could e.g. return some class object which wouldn't have
constexpr conversion operator to size_t/const char * and tons of other
reasons why the constant evaluation could fail. Without actually evaluating
it I don't see how we could guarantee anything for non-failed static_assert.
The second difference is that
static_assert (false, "foo"_myd);
in the testcase is normal failed static assertion and
static_assert (true, "foo"_myd);
would be accepted, while clang++ rejects it. IMHO
"foo"_myd doesn't match the syntactic requirements of unevaluated-string
as mentioned in http://eel.is/c++draft/dcl.pre#10 , and because
a constexpr udlit operator can return something which is valid, it shouldn't
be rejected just in case.
Last is clang++ ICEs on non-static data members size/data.
The first version of this support had a difference where M.data () was not
a constant expression but a core constant expression, but if M.size () != 0
M.data ()[0] ... M.data ()[M.size () - 1] were integer constant expressions.
We don't have any routine to test whether an expression is a core constant
expression, so what the code does is try silently whether M.data () is
a constant expression (maybe_constant_value), if it is, nice, we can use
that result to attempt to optimize the extraction of the message from it
if it is some recognized form involving a STRING_CST and just to double-check
try to constant evaluate M.data ()[0] and M.data ()[M.size () - 1] expressions
as boundaries but not anything in between. If M.data () is not a constant
expression, we don't fail, but use a slower method of evaluating M.data ()[i]
for i 0, 1, ... M.size () - 1. And if M.size () == 0, the above wouldn't
evaluate anything, so we try to constant evaluate (M.data (), 0) as constant
expression, which should succeed if M.data () is a core constant expression
and fail otherwise.
The patch assumes that these expressions are manifestly constant evaluated.
The patch implements what I see in the paper, because it is unclear what
further changes will be voted in (and the changes can be done at that
point).
The initial patch used tf_none in 6 spots so that just the static_assert
specific errors were emitted and not others, but during review this has been
changed, so that we emit both the more detailed errors why something wasn't
found or wasn't callable or wasn't convertible and diagnostics that
static_assert second argument needs to satisfy some of the needed properties.
2023-11-23 Jakub Jelinek <jakub@redhat.com>
PR c++/110348
gcc/
* doc/invoke.texi (-Wno-c++26-extensions): Document.
gcc/c-family/
* c.opt (Wc++26-extensions): New option.
* c-cppbuiltin.cc (c_cpp_builtins): For C++26 predefine
__cpp_static_assert to 202306L rather than 201411L.
gcc/cp/
* parser.cc: Implement C++26 P2741R3 - user-generated static_assert
messages.
(cp_parser_static_assert): Parse message argument as
conditional-expression if it is not a pure string literal or
several of them concatenated followed by closing paren.
* semantics.cc (finish_static_assert): Handle message which is not
STRING_CST. For condition with bare parameter packs return early.
* pt.cc (tsubst_expr) <case STATIC_ASSERT>: Also tsubst_expr
message and make sure that if it wasn't originally STRING_CST, it
isn't after tsubst_expr either.
gcc/testsuite/
* g++.dg/cpp26/static_assert1.C: New test.
* g++.dg/cpp26/feat-cxx26.C (__cpp_static_assert): Expect
202306L rather than 201411L.
* g++.dg/cpp0x/udlit-error1.C: Expect different diagnostics for
static_assert with user-defined literal.
Manolis Tsamis [Tue, 21 Nov 2023 09:05:02 +0000 (10:05 +0100)]
ifcvt: remove obsolete SUBREG handling in noce_convert_multiple_sets
This code used to handle SUBREG for register replacement when ifcvt
was doing the replacements manually. This special handling is not
needed anymore because simplify_replace_rtx is used for the
replacements and it properly handles these cases.
gcc/ChangeLog:
* ifcvt.cc (noce_convert_multiple_sets_1): Remove old code.
Signed-off-by: Philipp Tomsich <philipp.tomsich@vrull.eu>
Pan Li [Mon, 13 Nov 2023 03:22:37 +0000 (11:22 +0800)]
DSE: Allow vector type for get_stored_val when read < store
Update in v4:
* Merge upstream and removed some independent changes.
Update in v3:
* Take known_le instead of known_lt for vector size.
* Return NULL_RTX when gap is not equal 0 and not constant.
Update in v2:
* Move vector type support to get_stored_val.
Original log:
This patch would like to allow the vector mode in the
get_stored_val in the DSE. It is valid for the read
rtx if and only if the read bitsize is less than the
stored bitsize.
Given below example code with
--param=riscv-autovec-preference=fixed-vlmax.
Before this patch:
test:
lui a5,%hi(.LANCHOR0)
addi sp,sp,-32
addi a5,a5,%lo(.LANCHOR0)
li a3,32
vl2re64.v v2,0(a5)
vsetvli zero,a3,e8,m1,ta,ma
vs2r.v v2,0(sp) <== Unnecessary store to stack
vle8.v v1,0(sp) <== Ditto
vs1r.v v1,0(a0)
addi sp,sp,32
jr ra
After this patch:
test:
lui a5,%hi(.LANCHOR0)
addi a5,a5,%lo(.LANCHOR0)
li a4,32
addi sp,sp,-32
vsetvli zero,a4,e8,m1,ta,ma
vle8.v v1,0(a5)
vs1r.v v1,0(a0)
addi sp,sp,32
jr ra
Below tests are passed within this patch:
* The risc-v regression test.
* The x86 bootstrap and regression test.
* The aarch64 regression test.
PR target/111720
gcc/ChangeLog:
* dse.cc (get_stored_val): Allow vector mode if read size is
less than or equal to stored size.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/rvv/base/pr111720-0.c: New test.
* gcc.target/riscv/rvv/base/pr111720-1.c: New test.
* gcc.target/riscv/rvv/base/pr111720-10.c: New test.
* gcc.target/riscv/rvv/base/pr111720-2.c: New test.
* gcc.target/riscv/rvv/base/pr111720-3.c: New test.
* gcc.target/riscv/rvv/base/pr111720-4.c: New test.
* gcc.target/riscv/rvv/base/pr111720-5.c: New test.
* gcc.target/riscv/rvv/base/pr111720-6.c: New test.
* gcc.target/riscv/rvv/base/pr111720-7.c: New test.
* gcc.target/riscv/rvv/base/pr111720-8.c: New test.
* gcc.target/riscv/rvv/base/pr111720-9.c: New test.
Costas Argyris [Mon, 20 Nov 2023 17:58:16 +0000 (17:58 +0000)]
mingw: Exclude utf8 manifest [PR111170, PR108865]
Make the utf8 manifest optional (on by default and
explicitly off with --disable-win32-utf8-manifest)
in the mingw hosts.
Also eliminate duplication between the 32-bit and
64-bit mingw hosts by putting them both in the
same branch and special-case only the 64-bit long
long setting.
PR mingw/111170
PR mingw/108865
Signed-off-by: Costas Argyris <costas.argyris@gmail.com> Signed-off-by: Jonathan Yong <10walls@gmail.com>
gcc/Changelog:
* configure.ac: Handle new --enable-win32-utf8-manifest
option.
* config.host: allow win32 utf8 manifest to be disabled
by user.
* configure: Regenerate.
I made a mistake in the previous change to integer_store_memory_operand.
There is no support pa_emit_move sequence to handle secondary reloads of
integer REG+D instructions. Further, the Q constraint is used for some
non-simple instructions (movb and addib). Thus, we need to return true
when reload is in progress.
2023-11-22 John David Anglin <danglin@gcc.gnu.org>
gcc/ChangeLog:
PR target/112617
* config/pa/predicates.md (integer_store_memory_operand): Return
true for REG+D addresses when reload_in_progress is true.
Patrick Palka [Wed, 22 Nov 2023 18:54:29 +0000 (13:54 -0500)]
c++: alias template of non-template class [PR112633]
The entering_scope adjustment in tsubst_aggr_type assumes if an alias is
dependent, then so is the aliased type (and therefore it has template info)
but that's not true for the dependent alias template specialization ty1<T>
below which aliases the non-template class A. In this case no adjustment
is needed anyway, so we can just punt.
PR c++/112633
gcc/cp/ChangeLog:
* pt.cc (tsubst_aggr_type): Handle empty TYPE_TEMPLATE_INFO
in the entering_scope adjustment.
Iain Sandoe [Tue, 21 Nov 2023 10:19:29 +0000 (10:19 +0000)]
testsuite: Update path to intl include.
When we are building libintl in-tree, we need to pass the path
to the generated libintl.h include to the plugin tests. This
path has changed with the use of gettext directly.
gcc/testsuite/ChangeLog:
* lib/plugin-support.exp: Update the expected path to an
in-tree build of libintl.
Iain Sandoe [Thu, 26 Oct 2023 08:52:04 +0000 (09:52 +0100)]
testsuite, Darwin: Add support for Mach-O function body scans.
We need to process the source slightly differently from ELF, especially
in that we have __USER_LABEL_PREFIX__ and there are no function start
and end assembler directives. This means we cannot delineate functions
when frame output is switched off.
TODO: consider adding -mtest-markers or something similar to inject
assembler comments that can be scanned for.
gcc/testsuite/ChangeLog:
* lib/scanasm.exp: Initial handling for Mach-O function body scans.
Signed-off-by: Iain Sandoe <iain@sandoe.co.uk> Co-authored-by: Richard Sandiford <richard.sandiford@arm.com>
Richard Biener [Wed, 22 Nov 2023 10:10:41 +0000 (11:10 +0100)]
tree-optimization/112344 - wrong final value replacement
When performing final value replacement chrec_apply that's used to
compute the overall effect of niters to a CHREC doesn't consider that
the overall increment of { -2147483648, +, 2 } doesn't fit in
a signed integer when the loop iterates until the value of the IV
of 20. The following fixes this mistake, carrying out the multiply
and add in an unsigned type instead, avoiding undefined overflow
and thus later miscompilation by path range analysis.
PR tree-optimization/112344
* tree-chrec.cc (chrec_apply): Perform the overall increment
calculation and increment in an unsigned type.
Andrew Stubbs [Wed, 22 Nov 2023 13:46:12 +0000 (13:46 +0000)]
amdgcn: Fix vector TImode reload loop
I've only observed the problem on the devel/omp/gcc-13 branch, but this
could theoretically affect mainline also. The mov insns for the other modes
already have '$', so this completes the set.
gcc/ChangeLog:
* config/gcn/gcn-valu.md (*mov<mode>_4reg): Disparage AVGPR use when a
reload is required.
[IRA]: Fix using undefined dump file in IRA code during insn scheduling
Part of IRA code is used for register pressure sensitive insn
scheduling and live range shrinkage. Numerous changes of IRA resulted
in that this IRA code uses dump file passed by the scheduler and
internal ira dump file (in called functions) which can be undefined or
freed by the scheduler during compiling previous functions. The patch
fixes this problem. To reproduce the error valgrind should be used
and GCC should be compiled with valgrind annotations. Therefor the
patch does not contain the test case.
gcc/ChangeLog:
PR rtl-optimization/112610
* ira-costs.cc: (find_costs_and_classes): Remove arg.
Use ira_dump_file for printing.
(print_allocno_costs, print_pseudo_costs): Ditto.
(ira_costs): Adjust call of find_costs_and_classes.
(ira_set_pseudo_classes): Set up and restore ira_dump_file.
Florian Weimer [Wed, 22 Nov 2023 13:26:53 +0000 (14:26 +0100)]
gcc.misc-tests/linkage-y.c: Compatibility with C99+ system compilers
This program is compiled with an installed "cc" compiler, not the
built GCC compiler, so it should be as compatible as possible across a
wide range of compilers.
gcc/testsuite/
* gcc.misc-tests/linkage-y.c (puts): Declare.
(main): Add int return type and return 0.
Juzhe-Zhong [Wed, 22 Nov 2023 10:53:22 +0000 (18:53 +0800)]
RISC-V: Fix incorrect use of vcompress in permutation auto-vectorization
This patch fixes following FAILs on zvl512b of RV32 system:
FAIL: gcc.target/riscv/rvv/autovec/struct/struct_vect_run-12.c execution test
FAIL: gcc.target/riscv/rvv/autovec/struct/struct_vect_run-9.c execution test
The root cause is that for permutation indice = {0,3,7,0} use vcompress optimization
which is incorrect. Fix vcompress optimization bug.
The stray line defining enable_darwin_at_rpath outside of the scope of
_LT_DARWIN_LINKER_FEATURES is a mistake and should be removed. It leads
to a wrong line in fixincludes/ChangeLog because there is no $1 argument
at that point.
Christophe Lyon [Wed, 22 Nov 2023 09:50:11 +0000 (09:50 +0000)]
arm: [MVE intrinsics] Fix typo
In commt 0c2037d9d93a8f768cb11698ff794278246bb31f (Add support for
contiguous loads and stores), I added a spurious line which broke
bootstrap because of an unused variable error.
Xi Ruoyao [Sat, 18 Nov 2023 22:12:22 +0000 (06:12 +0800)]
LoongArch: Optimize LSX vector shuffle on floating-point vector
The vec_perm expander was wrongly defined. GCC internal says:
Operand 3 is the “selector”. It is an integral mode vector of the same
width and number of elements as mode M.
But we made operand 3 in the same mode as the shuffled vectors, so it
would be a FP mode vector if the shuffled vectors are FP mode.
With this mistake, the generic code manages to work around and it ends
up creating some very nasty code for a simple __builtin_shuffle (a, b,
c) where a and b are V4SF, c is V4SI:
This is obviously stupid. Fix the expander definition and adjust
loongarch_expand_vec_perm to handle it correctly.
gcc/ChangeLog:
* config/loongarch/lsx.md (vec_perm<mode:LSX>): Make the
selector VIMODE.
* config/loongarch/loongarch.cc (loongarch_expand_vec_perm):
Use the mode of the selector (instead of the shuffled vector)
for truncating it. Operate on subregs in the selector mode if
the shuffled vector has a different mode (i. e. it's a
floating-point vector).
Hongyu Wang [Fri, 17 Nov 2023 07:30:16 +0000 (15:30 +0800)]
[APX PUSH2POP2] Adjust operand order for PUSH2POP2
The push2/pop2 operand order does not match the binutils implementation
for AT&T syntax that it will first push operands[2] then operands[1].
Correct it by reverse operand order for AT&T syntax.
gcc/ChangeLog:
* config/i386/i386.md (push2_di): Adjust operand order for AT&T
syntax.
(pop2_di): Likewise.
(push2p_di): Likewise.
(pop2p_di): Likewise.
projects / thirdparty / gcc.git / log
