tree-optimization/87984 - hard register assignments not preserved

The following disables redundant store elimination to hard register
variables which isn't valid.

PR tree-optimization/87984
* tree-ssa-dom.cc (dom_opt_dom_walker::optimize_stmt): Do
not perform redundant store elimination to hard register
variables.
* tree-ssa-sccvn.cc (eliminate_dom_walker::eliminate_stmt):
Likewise.

* gcc.target/i386/pr87984.c: New testcase.

middle-end/66279 - gimplification clobbers shared asm constraints

When the C++ frontend clones a CTOR we do not copy ASM_EXPR constraints
fully as walk_tree does not recurse to TREE_PURPOSE of TREE_LIST nodes.
At this point doing that seems too dangerous so the following instead
avoids gimplification of ASM_EXPRs to clobber the shared constraints
and unshares it there, like it also unshares TREE_VALUE when it
re-writes a "+" output constraint to separate "=" output and matching
input constraint.

PR middle-end/66279
* gimplify.cc (gimplify_asm_expr): Copy TREE_PURPOSE before
rewriting it for "+" processing.

* g++.dg/pr66279.C: New testcase.

testsuite: Remove -m32 from another i386/ test

I found another test which uses -m32 in gcc.target/i386/ .  Similarly
to the previously posted test, the test ought to be tested during i686-linux
testing or x86_64-linux test with --target_board=unix\{-m32,-m64\}
There is nothing ia32 specific on the test, so I've just dropped the -m32.

2025-02-28  Jakub Jelinek  <jakub@redhat.com>

* gcc.target/i386/strub-pr118006.c: Remove -m32 from dg-options.

testsuite: Fix up gcc.target/i386/pr118940.c test [PR118940]

The testcase uses -m32 in dg-options, something we try hard not to do,
if something should be tested only for -m32, it is { target ia32 } test,
if it can be tested for -m64/-mx32 too, just some extra options are
needed for ia32, it should have dg-additional-options with ia32 target.

Also, the test wasn't reduced, so I've reduced it using cvise and manual
tweaks and verified the test still FAILs before r15-7700 and succeeds
with current trunk.

2025-02-28  Jakub Jelinek  <jakub@redhat.com>

PR target/118940
* gcc.target/i386/pr118940.c: Drop -w, -g and -m32 from dg-options, move
-march=i386 -mregparm=3 to dg-additional-options for ia32 and -fno-pie
to dg-additional-options for pie.  Reduce the test.

Fortran: Ensure finalizer is called for unreferenced variable [PR118730]

PR fortran/118730

gcc/fortran/ChangeLog:

* resolve.cc: Mark unused derived type variable with finalizers
referenced to execute finalizer when leaving scope.

gcc/testsuite/ChangeLog:

* gfortran.dg/class_array_15.f03: Remove unused variable.
* gfortran.dg/coarray_poly_7.f90: Adapt scan-tree-dump expr.
* gfortran.dg/coarray_poly_8.f90: Same.
* gfortran.dg/finalize_60.f90: New test.

MAINTAINERS: add myself to write after approval and DCO

ChangeLog:

* MAINTAINERS: Added myself as write after approval and DCO.

x86: Move TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P to i386.cc

Move the TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P target hook from
i386.h to i386.cc.

* config/i386/i386.h (TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P):
Moved to ...
* config/i386/i386.cc (TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P):
Here.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>

Daily bump.

RISC-V: Fix bug for expand_const_vector interleave [PR118931]

This patch would like to fix one bug when expanding const vector for the
interleave case.  For example, we have:

base1 = 151
step = 121

For vec_series, we will generate vector in format of v[i] = base + i * step.
Then the vec_series will have below result for HImode, and we can find
that the result overflow to the highest 8 bits of HImode.

v1.b = {151, 255, 7,  0, 119,  0, 231,  0, 87,  1, 199,  1, 55,   2, 167,   2}

Aka we expect v1.b should be:

v1.b = {151, 0, 7,  0, 119,  0, 231,  0, 87,  0, 199,  0, 55,   0, 167,   0}

After that it will perform the IOR with v2 for the base2(aka another series).

v2.b =  {0,  17, 0, 33,   0, 49,   0, 65,  0, 81,   0, 97,  0, 113,   0, 129}

Unfortunately, the base1 + i * step1 in HImode may overflow to the high
8 bits, and the high 8 bits will pollute the v2 and result in incorrect
value in const_vector.

This patch would like to perform the overflow to smode check before the
optimized interleave code generation.  If overflow or VLA, it will fall
back to the default merge approach.

The below test suites are passed for this patch.
* The rv64gcv fully regression test.

PR target/118931

gcc/ChangeLog:

* config/riscv/riscv-v.cc (expand_const_vector): Add overflow to
smode check and clean up highest bits if overflow.

gcc/testsuite/ChangeLog:

* gcc.target/riscv/rvv/base/pr118931-run-1.c: New test.

Signed-off-by: Pan Li <pan2.li@intel.com>

libphobos: Run unittest tests with dg-runtest.

Use `dg-runtest' test driver rather than `dg-test' to run the libphobos
unittest testsuite, same as all other libphobos tests.  This prevents
the tests from being ran multiple times when parallelized.

Set `libphobos_test_name' as well so that all tests get a unique name.

libphobos/ChangeLog:

* testsuite/libphobos.unittest/unittest.exp: Use `dg-runtest' rather
than `dg-test'.  Set `libphobos_test_name'.

libstdc++: Fix outdated comment in <stacktrace>

My r15-998-g2a83084ce55363 change replaced the use of nothrow
operator new with a call to __get_temporary_buffer, so update the
comment to match.

libstdc++-v3/ChangeLog:

* include/std/stacktrace (_Impl::_M_allocate): Fix outdated
comment.

gimple-fold: Fix a pasto in fold_truth_andor_for_ifcombine [PR119030]

The following testcase is miscompiled since r15-7597.
The left comparison is unsigned (x & 0x8000U) != 0) while the
right one is signed (x >> 16) >= 0 and is actually a signbit test,
so rsignbit is 64.
After debugging this and reading the r15-7597 change, I believe there
is just a pasto, the if (lsignbit) and if (rsignbit) blocks are pretty
much identical with just the first l on all variables starting with l
replaced with r (the only difference is that if (lsignbit) has a comment
explaining the sign <<= 1; stuff, while it isn't repeated in the second one.
Except the second one was using ll_unsignedp instead of rl_unsignedp
in one spot.  I think it should use the latter, the signedness of the left
comparison doesn't affect the other one, they are basically independent
with the exception that we check that after transformations they are both
EQ or both NE and later on we try to merge them together.

2025-02-27  Jakub Jelinek  <jakub@redhat.com>

PR tree-optimization/119030
* gimple-fold.cc (fold_truth_andor_for_ifcombine): Fix a pasto,
ll_unsignedp -> rl_unsignedp.

* gcc.c-torture/execute/pr119030.c: New test.

input: Fix up ICEs with --param=file-cache-files=N for N > 16 [PR118860]

The following testcase ICEs, because we first construct file_cache object
inside of *global_dc, then process options and then call file_cache::tune.
The earlier construction allocates the m_file_slots array (using new)
based on the static data member file_cache::num_file_slots, but then tune
changes it, without actually reallocating all m_file_slots arrays in already
constructed file_cache objects.

I think it is just weird to have the count be a static data member and
the pointer be non-static data member, that is just asking for issues like
this.

So, this patch changes num_file_slots into m_num_file_slots and turns tune
into a non-static member function and changes toplev.cc to call it on the
global_gc->get_file_cache () object.  And let's the tune just delete the
array and allocate it freshly if there is a change in the number of slots
or lines.

Note, file_cache_slot has similar problem, but because there are many, I
haven't moved the count into those objects; I just hope that when tune
is called there is exactly one file_cache constructed and all the
file_cache_slot objects constructed are pointed by its m_file_slots member,
so also on lines change it just deletes it and allocates again.  I think
it should be unlikely that the cache actually has any used slots by the time
it is called.

2025-02-27  Jakub Jelinek  <jakub@redhat.com>

PR middle-end/118860
* input.h (file_cache::tune): No longer static.  Rename argument
from num_file_slots_ to num_file_slots.  Formatting fix.
(file_cache::num_file_slots): Renamed to ...
(file_cache::m_num_file_slots): ... this.  No longer static.
* input.cc (file_cache_slot::tune): Change return type from void to
size_t, return previous file_cache_slot::line_record_size value.
Formatting fixes.
(file_cache::tune): Rename argument from num_file_slots_ to
num_file_slots.  Set m_num_file_slots rather than num_file_slots.
If m_num_file_slots or file_cache_slot::line_record_size changes,
delete[] m_file_slots and new it again.
(file_cache::num_file_slots): Remove definition.
(file_cache::lookup_file): Use m_num_file_slots rather than
num_file_slots.
(file_cache::evicted_cache_tab_entry): Likewise.
(file_cache::file_cache): Likewise.  Initialize m_num_file_slots
to 16.
(file_cache::dump): Use m_num_file_slots rather than num_file_slots.
(file_cache_slot::get_next_line): Formatting fixes.
(file_cache_slot::read_line_num): Likewise.
(get_source_text_between): Likewise.
* toplev.cc (toplev::main): Call global_dc->get_file_cache ().tune
rather than file_cache::tune.

* gcc.dg/pr118860.c: New test.

nvptx: '#define MAX_FIXED_MODE_SIZE 128'

... instead of 64 via 'gcc/defaults.h':

    MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)

This fixes ICEs:

    [-FAIL: c-c++-common/pr111309-1.c  -Wc++-compat  (internal compiler error: in expand_fn_using_insn, at internal-fn.cc:268)-]
    [-FAIL:-]{+PASS:+} c-c++-common/pr111309-1.c  -Wc++-compat  (test for excess errors)
    [-UNRESOLVED:-]{+PASS:+} c-c++-common/pr111309-1.c  -Wc++-compat  [-compilation failed to produce executable-]{+execution test+}

    [-FAIL: c-c++-common/pr111309-1.c  -std=gnu++17 (internal compiler error: in expand_fn_using_insn, at internal-fn.cc:268)-]
    [-FAIL:-]{+PASS:+} c-c++-common/pr111309-1.c  -std=gnu++17 (test for excess errors)
    [-UNRESOLVED:-]{+PASS:+} c-c++-common/pr111309-1.c  -std=gnu++17 [-compilation failed to produce executable-]{+execution test+}
    [-FAIL: c-c++-common/pr111309-1.c  -std=gnu++26 (internal compiler error: in expand_fn_using_insn, at internal-fn.cc:268)-]
    [-FAIL:-]{+PASS:+} c-c++-common/pr111309-1.c  -std=gnu++26 (test for excess errors)
    [-UNRESOLVED:-]{+PASS:+} c-c++-common/pr111309-1.c  -std=gnu++26 [-compilation failed to produce executable-]{+execution test+}
    [-FAIL: c-c++-common/pr111309-1.c  -std=gnu++98 (internal compiler error: in expand_fn_using_insn, at internal-fn.cc:268)-]
    [-FAIL:-]{+PASS:+} c-c++-common/pr111309-1.c  -std=gnu++98 (test for excess errors)
    [-UNRESOLVED:-]{+PASS:+} c-c++-common/pr111309-1.c  -std=gnu++98 [-compilation failed to produce executable-]{+execution test+}

    [-FAIL: gcc.dg/torture/pr116480-1.c   -O0  (internal compiler error: in expand_fn_using_insn, at internal-fn.cc:268)-]
    [-FAIL:-]{+PASS:+} gcc.dg/torture/pr116480-1.c   -O0  (test for excess errors)
    [-FAIL: gcc.dg/torture/pr116480-1.c   -O1  (internal compiler error: in expand_fn_using_insn, at internal-fn.cc:268)-]
    [-FAIL:-]{+PASS:+} gcc.dg/torture/pr116480-1.c   -O1  (test for excess errors)
    PASS: gcc.dg/torture/pr116480-1.c   -O2  (test for excess errors)
    PASS: gcc.dg/torture/pr116480-1.c   -O3 -g  (test for excess errors)
    PASS: gcc.dg/torture/pr116480-1.c   -Os  (test for excess errors)

..., where we ran into 'gcc_assert (icode != CODE_FOR_nothing);' in
'gcc/internal-fn.cc:expand_fn_using_insn' for '__int128' '__builtin_clzg' etc.:

    during RTL pass: expand
    [...]/c-c++-common/pr111309-1.c: In function 'clzI':
    [...]/c-c++-common/pr111309-1.c:69:10: internal compiler error: in expand_fn_using_insn, at internal-fn.cc:268
    0x120ec2cf internal_error(char const*, ...)
            [...]/gcc/diagnostic-global-context.cc:517
    0x102c7c5b fancy_abort(char const*, int, char const*)
            [...]/gcc/diagnostic.cc:1722
    0x109708eb expand_fn_using_insn
            [...]/gcc/internal-fn.cc:268
    0x1098114f expand_internal_call(internal_fn, gcall*)
            [...]/gcc/internal-fn.cc:5273
    0x1098114f expand_internal_call(gcall*)
            [...]/gcc/internal-fn.cc:5281
    0x10594fc7 expand_call_stmt
            [...]/gcc/cfgexpand.cc:3049
    [...]

Likewise, as of commit e8ad697a75b0870a833366daf687668a57cabb6e
"libstdc++: Use new type-generic built-ins in <bit> [PR118855]",
the libstdc++ target library build ICEd in the same way.

Additionally, this change fixes:

    [-FAIL:-]{+PASS:+} gcc.dg/pr105094.c (test for excess errors)

..., which was:

    [...]/gcc.dg/pr105094.c: In function 'foo':
    [...]/gcc.dg/pr105094.c:11:12: error: size of variable 's' is too large

And, finally, regarding 'gcc.target/nvptx/stack_frame-1.c'.  Before, in
'gcc/cfgexpand.cc': 'expand_used_vars' -> 'expand_used_vars_for_block' ->
'expand_one_var' for 'ww' -> 'gcc/function.cc:use_register_for_decl' due to
'DECL_MODE (decl) == BLKmode' did 'return false;', thus -> 'add_stack_var'
(even if 'ww' wasn't then actually living on the stack).  Now, 'ww' has
'TImode' and 'use_register_for_decl' does 'return true;', thus ->
'expand_one_register_var', and therefore no unused stack frame emitted.

gcc/
* config/nvptx/nvptx.h (MAX_FIXED_MODE_SIZE): '#define'.
gcc/testsuite/
* gcc.target/nvptx/stack_frame-1.c: Adjust.

Add 'gcc.target/nvptx/stack_frame-1.c'

gcc/testsuite/
* gcc.target/nvptx/stack_frame-1.c: New.

nvptx: Build libgfortran with '-mfake-ptx-alloca' [PR107635]

As of recent commit 8bf0ee8d62b8a08e808344d31354ab713157e15d
"Fortran: Add transfer_between_remotes [PR107635]", we've got 'alloca' usage
in 'libgfortran/caf/single.c:_gfortran_caf_transfer_between_remotes', and
the libgfortran target library fails to build for legacy configurations where
PTX 'alloca' is not available:

    ../../../../source-gcc/libgfortran/caf/single.c: In function ‘_gfortran_caf_transfer_between_remotes’:
    ../../../../source-gcc/libgfortran/caf/single.c:675:23: sorry, unimplemented: dynamic stack allocation not supported
      675 |       transfer_desc = __builtin_alloca (desc_size);
          |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
    ../../../../source-gcc/libgfortran/caf/single.c:680:20: sorry, unimplemented: dynamic stack allocation not supported
      680 |     transfer_ptr = __builtin_alloca (*opt_dst_charlen * src_size);
          |                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    make[6]: *** [Makefile:4675: caf/single.lo] Error 1

With '-mfake-ptx-alloca', libgfortran again succeeds to build, and compared
to before, we've got only a small number of regressions due to nvptx 'ld'
complaining about 'unresolved symbol __GCC_nvptx__PTX_alloca_not_supported':

    [-PASS:-]{+FAIL:+} gfortran.dg/coarray/codimension_2.f90 -fcoarray=lib  -O2  -lcaf_single (test for excess errors)

    [-PASS:-]{+FAIL:+} gfortran.dg/coarray/event_4.f08 -fcoarray=lib  -O2  -lcaf_single (test for excess errors)
    [-PASS:-]{+UNRESOLVED:+} gfortran.dg/coarray/event_4.f08 -fcoarray=lib  -O2  -lcaf_single [-execution test-]{+compilation failed to produce executable+}

    [-PASS:-]{+FAIL:+} gfortran.dg/coarray/fail_image_2.f08 -fcoarray=lib  -O2  -lcaf_single (test for excess errors)
    [-PASS:-]{+UNRESOLVED:+} gfortran.dg/coarray/fail_image_2.f08 -fcoarray=lib  -O2  -lcaf_single [-execution test-]{+compilation failed to produce executable+}

    [-PASS:-]{+FAIL:+} gfortran.dg/coarray/proc_pointer_assign_1.f90 -fcoarray=lib  -O2  -lcaf_single (test for excess errors)
    [-PASS:-]{+UNRESOLVED:+} gfortran.dg/coarray/proc_pointer_assign_1.f90 -fcoarray=lib  -O2  -lcaf_single [-execution test-]{+compilation failed to produce executable+}

    [-PASS:-]{+FAIL:+} gfortran.dg/coarray_43.f90   -O  (test for excess errors)

That's acceptable for such legacy PTX configurations.

PR target/107635
libgfortran/
* config/t-nvptx: New.
* configure.host [nvptx] (tmake_file): Add it.

nvptx: Support '-mfake-ptx-alloca'

With '-mfake-ptx-alloca' enabled, the user-visible behavior changes only
for configurations where PTX 'alloca' is not available.  Rather than a
compile-time 'sorry, unimplemented: dynamic stack allocation not supported'
in presence of dynamic stack allocation, compilation and assembly then
succeeds.  However, attempting to link in such '*.o' files then fails due
to unresolved symbol '__GCC_nvptx__PTX_alloca_not_supported'.

This is meant to be used in scenarios where large volumes of code are
compiled, a small fraction of which runs into dynamic stack allocation, but
these parts are not important for specific use cases, and we'd thus like the
build to succeed, and error out just upon actual, very rare use of the
offending '*.o' files.

gcc/
* config/nvptx/nvptx.opt (-mfake-ptx-alloca): New.
* config/nvptx/nvptx-protos.h (nvptx_output_fake_ptx_alloca):
Declare.
* config/nvptx/nvptx.cc (nvptx_output_fake_ptx_alloca): New.
* config/nvptx/nvptx.md (define_insn "@nvptx_alloca_<mode>")
[!(TARGET_PTX_7_3 && TARGET_SM52)]: Use it for
'-mfake-ptx-alloca'.
gcc/testsuite/
* gcc.target/nvptx/alloca-1-O0_-mfake-ptx-alloca.c: New.
* gcc.target/nvptx/alloca-2-O0_-mfake-ptx-alloca.c: Likewise.
* gcc.target/nvptx/alloca-4-O3_-mfake-ptx-alloca.c: Likewise.
* gcc.target/nvptx/vla-1-O0_-mfake-ptx-alloca.c: Likewise.
* gcc.target/nvptx/alloca-4-O3.c:
'dg-additional-options -mfake-ptx-alloca'.

nvptx: Delay 'sorry, unimplemented: dynamic stack allocation not supported' from expansion time to code generation

This gives the back end a chance to clean out a few more unnecessary instances
of dynamic stack allocation.  This progresses:

    PASS: gcc.dg/pr78902.c  (test for warnings, line 7)
    PASS: gcc.dg/pr78902.c  (test for warnings, line 8)
    PASS: gcc.dg/pr78902.c  (test for warnings, line 9)
    PASS: gcc.dg/pr78902.c  (test for warnings, line 10)
    PASS: gcc.dg/pr78902.c  (test for warnings, line 11)
    PASS: gcc.dg/pr78902.c  (test for warnings, line 12)
    PASS: gcc.dg/pr78902.c  (test for warnings, line 13)
    PASS: gcc.dg/pr78902.c strndup excessive bound at line 14 (test for warnings, line 13)
    [-UNSUPPORTED: gcc.dg/pr78902.c: dynamic stack allocation not supported-]
    {+PASS: gcc.dg/pr78902.c (test for excess errors)+}

    UNSUPPORTED: gcc.dg/torture/pr71901.c   -O0 : dynamic stack allocation not supported
    [-UNSUPPORTED:-]{+PASS:+} gcc.dg/torture/pr71901.c   -O1  [-: dynamic stack allocation not supported-]{+(test for excess errors)+}
    UNSUPPORTED: gcc.dg/torture/pr71901.c   -O2 : dynamic stack allocation not supported
    UNSUPPORTED: gcc.dg/torture/pr71901.c   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions : dynamic stack allocation not supported
    UNSUPPORTED: gcc.dg/torture/pr71901.c   -O3 -g : dynamic stack allocation not supported
    [-UNSUPPORTED:-]{+PASS:+} gcc.dg/torture/pr71901.c   -Os  [-: dynamic stack allocation not supported-]{+(test for excess errors)+}

    UNSUPPORTED: gcc.dg/torture/pr78742.c   -O0 : dynamic stack allocation not supported
    [-UNSUPPORTED:-]{+PASS:+} gcc.dg/torture/pr78742.c   -O1  [-: dynamic stack allocation not supported-]{+(test for excess errors)+}
    [-UNSUPPORTED:-]{+PASS:+} gcc.dg/torture/pr78742.c   -O2  [-: dynamic stack allocation not supported-]{+(test for excess errors)+}
    [-UNSUPPORTED:-]{+PASS:+} gcc.dg/torture/pr78742.c   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  [-: dynamic stack allocation not supported-]{+(test for excess errors)+}
    [-UNSUPPORTED:-]{+PASS:+} gcc.dg/torture/pr78742.c   -O3 -g  [-: dynamic stack allocation not supported-]{+(test for excess errors)+}
    UNSUPPORTED: gcc.dg/torture/pr78742.c   -Os : dynamic stack allocation not supported

    [-UNSUPPORTED:-]{+PASS:+} gfortran.dg/pr101267.f90   -O  [-: dynamic stack allocation not supported-]{+(test for excess errors)+}

    [-UNSUPPORTED:-]{+PASS:+} gfortran.dg/pr112404.f90   -O  [-: dynamic stack allocation not supported-]{+(test for excess errors)+}

gcc/
* config/nvptx/nvptx.md (define_expand "allocate_stack")
[!TARGET_SOFT_STACK]: Move
'sorry ("dynamic stack allocation not supported");'...
(define_insn "@nvptx_alloca_<mode>"): ... here.
gcc/testsuite/
* gcc.target/nvptx/alloca-1-unused-O0-sm_30.c: Adjust.

nvptx: Add test cases for dead/unused 'alloca'/VLA

gcc/testsuite/
* gcc.target/nvptx/alloca-1-dead-O0-sm_30.c: New.
* gcc.target/nvptx/alloca-1-dead-O0.c: Likewise.
* gcc.target/nvptx/alloca-1-dead-O1-sm_30.c: Likewise.
* gcc.target/nvptx/alloca-1-dead-O1.c: Likewise.
* gcc.target/nvptx/alloca-1-unused-O0-sm_30.c: Likewise.
* gcc.target/nvptx/alloca-1-unused-O0.c: Likewise.
* gcc.target/nvptx/alloca-1-unused-O1-sm_30.c: Likewise.
* gcc.target/nvptx/alloca-1-unused-O1.c: Likewise.
* gcc.target/nvptx/vla-1-dead-O0-sm_30.c: Likewise.
* gcc.target/nvptx/vla-1-dead-O0.c: Likewise.
* gcc.target/nvptx/vla-1-dead-O1-sm_30.c: Likewise.
* gcc.target/nvptx/vla-1-dead-O1.c: Likewise.
* gcc.target/nvptx/vla-1-unused-O0-sm_30.c: Likewise.
* gcc.target/nvptx/vla-1-unused-O0.c: Likewise.
* gcc.target/nvptx/vla-1-unused-O1-sm_30.c: Likewise.
* gcc.target/nvptx/vla-1-unused-O1.c: Likewise.

GCC: Documentation of -x option

This change updates information about the -x option to clarify
that it does not ensure standards compliance. Sparked by
discussions in the following PR.

PR fortran/108369

gcc/ChangeLog:

* doc/invoke.texi: Add a note to clarify. Adjust some wording.

c++: ICE with GOTO_EXPR [PR118928]

In this PR we crash in cxx_eval_constant_expression/GOTO_EXPR on:

  gcc_assert (cxx_dialect >= cxx23);

The code obviously doesn't expect to see a goto pre-C++23.  But we can
get here with the new prvalue optimization.  In this test we found
ourselves in synthesize_method for X::X().  This function calls:

 a) finish_function, which does cp_genericize -> ... -> genericize_c_loops,
    which creates the GOTO_EXPR;
 b) expand_or_defer_fn -> maybe_clone_body -> ... -> cp_fold_function
    where we reach the new maybe_constant_init call and crash on the
    goto.

Since we can validly get to that assert, I think we should just remove
it.  I don't see other similar asserts like this one.

PR c++/118928

gcc/cp/ChangeLog:

* constexpr.cc (cxx_eval_constant_expression) <case GOTO_EXPR>: Remove
an assert.

gcc/testsuite/ChangeLog:

* g++.dg/cpp0x/constexpr-prvalue5.C: New test.

Reviewed-by: Jason Merrill <jason@redhat.com>

[PR118940][LRA]: Add a test

PR115458 also solves given PR.  So the patch adds only a
test case which can be used for testing LRA work aspects different from
PR115458 test case.

gcc/testsuite/ChangeLog:

PR target/118940
* gcc.target/i386/pr118940.c: New test.

[PR116336][LRA]: Add a test

  Patch for PR116234 solves given PR116366.  So the patch adds only the test
case which is very different from PR116234 one.

gcc/testsuite/ChangeLog:

PR rtl-optimization/116336
* gcc.dg/pr116336.c: New test.

c++: too many errors with sneaky template [PR118516]

Since C++20 P0846, a name followed by a < can be treated as a template-name
even though name lookup did not find a template-name.  That happens
in this test with "i < foo ()":

  for (int id = 0; i < foo(); ++id);

and results in a raft of errors about non-constant foo().  The problem
is that the require_potential_constant_expression call in
cp_parser_template_argument emits errors even when we're parsing
tentatively.  So we repeat the error when we're trying to parse
as a nested-name-specifier, type-name, etc.

Guarding the call with !cp_parser_uncommitted_to_tentative_parse_p would
mean that require_potential_constant_expression never gets called.  But
we don't need the call at all as far as I can tell.  Stuff like

  template<int N> struct S { };
  int foo () { return 4; }
  void
  g ()
  {
    S<foo()> s;
  }

gets diagnosed in convert_nontype_argument.  In fact, with this patch,
we only emit "call to non-constexpr function" once.  (That is, in C++17
only; C++14 uses a different path.)

PR c++/118516

gcc/cp/ChangeLog:

* parser.cc (cp_parser_template_argument): Don't call
require_potential_constant_expression.

gcc/testsuite/ChangeLog:

* g++.dg/cpp2a/fn-template11.C:
* g++.dg/template/fn-template1.C: New test.
* g++.dg/template/fn-template2.C: New test.

testsuite: arm: Avoid incremental link warnings in pr61123-enum-size

This test uses incremental linking, but that can generate warnings if
the LTO step contains a mix of LTO and non-LTO object files (this can
happen when there's a testglue file that is normally included during
linking).

We don't care about the testglue, though, so just tell the LTO
optimizer to generate nolto-rel output, which is what it is falling
back to anyway.

gcc/testsuite:
* gcc.target/arm/lto/pr61123-enum-size_0.c: (dg-lto-options) Move
linker related options to ...
(dg-extra-ld-options): ... here.  Add -flinker-output=nolto-rel.

Fortran: Fix ICE on associate of pointer [PR118789]

Fix ICE when associating a pointer to void (c_ptr) by looking at the
compatibility of the type hierarchy.

PR fortran/118789

gcc/fortran/ChangeLog:

* trans-stmt.cc (trans_associate_var): Compare pointed to types when
expr to associate is already a pointer.

gcc/testsuite/ChangeLog:

* gfortran.dg/associate_73.f90: New test.

i386: Treat Granite Rapids/Granite Rapids-D/Diamond Rapids similar as Sapphire Rapids in x86-tune.def

Since GNR, GNR-D, DMR are both P-core based, we should treat them
just like SPR for now.

gcc/ChangeLog:

* config/i386/x86-tune.def
(X86_TUNE_DEST_FALSE_DEP_FOR_GLC): Add GNR, GNR-D, DMR.
(X86_TUNE_AVOID_256FMA_CHAINS): Ditto.
(X86_TUNE_AVX512_MOVE_BY_PIECES): Ditto.
(X86_TUNE_AVX512_STORE_BY_PIECES): Ditto.

gimple-range-phi: Fix comment typo

During reading of this file I've noticed a typo in the comment, which
this patch fixes.

2025-02-27  Jakub Jelinek  <jakub@redhat.com>

* gimple-range-phi.cc (phi_analyzer::process_phi): Fix comment typo,
dpoesn;t -> doesn't.

Makefile: Link in {simple,lazy}-diagnostic-path.o [PR116143]

Some of the plugin.exp tests FAIL in --enable-checking=release builds while
they succeed in --enable-checking=yes builds.
Initially I've changed some small simple out of line methods into inline ones
in the header, but the tests kept failing, just with different symbols.

The _ZN22simple_diagnostic_path9add_eventEmP9tree_nodeiPKcz symbol (and the
others too) are normally emitted in simple-diagnostic-path.o, it isn't some
fancy C++ optimization of classes with final method or LTO optimization.

The problem is that simple-diagnostic-path.o is like most objects added into
libbackend.a and we then link libbackend.a without -Wl,--whole-archive ...
-Wl,--no-whole-archive around it (and can't easily, not all system compilers
and linkers will support that).
With --enable-checking=yes simple-diagnostic-path.o is pulled in, because
selftest-run-tests.o calls simple_diagnostic_path_cc_tests and so
simple-diagnostic-path.o is linked in.
With --enable-checking=release self-tests aren't done and nothing links in
simple-diagnostic-path.o, because nothing in the compiler proper needs
anything from it, only the plugin tests.

Using -Wl,-M on cc1 linking, I see that in --enable-checking=release
build
analyzer/analyzer-selftests.o
digraph.o
dwarf2codeview.o
fibonacci_heap.o
function-tests.o
hash-map-tests.o
hash-set-tests.o
hw-doloop.o
insn-peep.o
lazy-diagnostic-path.o
options-urls.o
ordered-hash-map-tests.o
pair-fusion.o
print-rtl-function.o
resource.o
rtl-tests.o
selftest-rtl.o
selftest-run-tests.o
simple-diagnostic-path.o
splay-tree-utils.o
typed-splay-tree.o
vmsdbgout.o
aren't linked into cc1 (the *test* for obvious reasons of not doing
selftests, pair-fusion.o because it is aarch64 specific, hw-doloop.o because
x86 doesn't have doloop opts, vmsdbgout.o because not on VMS).

So, the question is if and what from digraph.o, fibinacci_heap.o,
hw-doloop.o, insn-peep.o, lazy-diagnostic-path.o, options-urls.o,
pair-fusion.o, print-rtl-function.o, resource.o, simple-diagnostic-path.o,
splay-tree-utils.o, typed-splay-tree.o are supposed to be part of the
plugin API if anything and how we arrange for those to be linked in when
plugins are enabled.

The following patch just adds unconditionally the
{simple,lazy}-diagnostic-path.o objects to the link lines before libbackend.a
so that their content is available to plugin users.

2025-02-27  Jakub Jelinek  <jakub@redhat.com>

PR testsuite/116143
* Makefile.in (EXTRA_BACKEND_OBJS): New variable.
(BACKEND): Use it before libbackend.a.

alias: Perform offset arithmetics in poly_offset_int rather than poly_int64 [PR118819]

This PR is about ubsan error on the c - cx1 + cy1 evaluation in the first
hunk.

The following patch hopefully fixes that by doing the additions/subtractions
in poly_offset_int rather than poly_int64 and then converting back to poly_int64.
If it doesn't fit, -1 is returned (which means it is unknown if there is a conflict
or not).

2025-02-27  Jakub Jelinek  <jakub@redhat.com>

PR middle-end/118819
* alias.cc (memrefs_conflict_p): Perform arithmetics on c, xsize and
ysize in poly_offset_int and return -1 if it is not representable in
poly_int64.

Daily bump.

libstdc++: Add code comment documenting LWG 4027 change [PR118083]

PR libstdc++/118083

libstdc++-v3/ChangeLog:

* include/bits/ranges_base.h
(ranges::__access::__possibly_const_range): Mention LWG 4027.

c: Assorted fixes for flexible array members in unions [PR119001]

r15-209 allowed flexible array members inside of unions, but as the
following testcase shows, not everything has been adjusted for that.
Unlike structures, in unions flexible array member (as an extension)
can be any of the members, not just the last one, as in union all
members are effectively last.
The first hunk is about an ICE on the initialization of the FAM
in union which is not the last FIELD_DECL with a string literal,
the second hunk just formatting fix, third hunk fixes a bug in which
we were just throwing away the initializers (except for with string literal)
of FAMs in unions which aren't the last FIELD_DECL, and the last hunk
is to diagnose FAM errors in unions the same as for structures, in
particular trying to initialize a FAM with non-constant or initialization
in nested context.

2025-02-26  Jakub Jelinek  <jakub@redhat.com>

PR c/119001
gcc/
* varasm.cc (output_constructor_regular_field): Don't fail
assertion if next is non-NULL and FIELD_DECL if
TREE_CODE (local->type) is UNION_TYPE.
gcc/c/
* c-typeck.cc (pop_init_level): Don't clear constructor_type
if DECL_CHAIN of constructor_fields is NULL but p->type is UNION_TYPE.
Formatting fix.
(process_init_element): Diagnose non-static initialization of flexible
array member in union or FAM in union initialization in nested context.
gcc/testsuite/
* gcc.dg/pr119001-1.c: New test.
* gcc.dg/pr119001-2.c: New test.

c: stddef.h C23 fixes [PR114870]

The stddef.h header for C23 defines __STDC_VERSION_STDDEF_H__ and
unreachable macros multiple times in some cases.
The header doesn't have normal multiple inclusion guard, because it supports
for glibc inclusion with __need_{size_t,wchar_t,ptrdiff_t,wint_t,NULL}.
While the definition of __STDC_VERSION_STDDEF_H__ and unreachable is done
solely in the #ifdef _STDDEF_H part, so they are defined only if stddef.h
is included without those __need_* macros defined.  But actually once
stddef.h is included without the __need_* macros, _STDDEF_H is then defined
and while further stddef.h includes without __need_* macros don't do
anything:
 #if (!defined(_STDDEF_H) && !defined(_STDDEF_H_) && !defined(_ANSI_STDDEF_H) \
      && !defined(__STDDEF_H__)) \
     || defined(__need_wchar_t) || defined(__need_size_t) \
     || defined(__need_ptrdiff_t) || defined(__need_NULL) \
     || defined(__need_wint_t)
if one includes whole stddef.h first and then stddef.h with some of the
__need_* macros defined, the #ifdef _STDDEF_H part is used again.
It isn't that big deal for most cases, as it uses extra guarding macros
like:
 #ifndef _GCC_MAX_ALIGN_T
 #define _GCC_MAX_ALIGN_T
 ...
 #endif
etc., but for __STDC_VERSION_STDDEF_H__/unreachable nothing like that is
used.

So, either we do what the following patch does and just don't define
__STDC_VERSION_STDDEF_H__/unreachable second time, or use #ifndef
unreachable separately for the #define unreachable() case, or use
new _GCC_STDC_VERSION_STDDEF_H macro to guard this (or two, one for
__STDC_VERSION_STDDEF_H__ and one for unreachable), or rework the initial
condition to be just
 #if !defined(_STDDEF_H) && !defined(_STDDEF_H_) && !defined(_ANSI_STDDEF_H) \
     && !defined(__STDDEF_H__)
- I really don't understand why the header should do anything at all after
it has been included once without __need_* macros.  But changing how this
behaves after 35 years might be risky for various OS/libc combinations.

2025-02-26  Jakub Jelinek  <jakub@redhat.com>

PR c/114870
* ginclude/stddef.h (__STDC_VERSION_STDDEF_H__, unreachable): Don't
redefine multiple times if stddef.h is first included without __need_*
defines and later with them.  Move nullptr_t and unreachable and
__STDC_VERSION_STDDEF_H__ definitions into the same
defined (__STDC_VERSION__) && __STDC_VERSION__ > 201710L #if block.

* gcc.dg/c23-stddef-2.c: New test.

arm: Fix up REVERSE_CONDITION macro [PR119002]

The linaro CI found my PR119002 patch broke bootstrap on arm.
Seems the problem is that it has incorrect REVERSE_CONDITION macro
definition.
All other target's REVERSE_CONDITION definitions and the default one
just use the macro's arguments, while arm.h definition uses the MODE
argument but uses code instead of CODE (the first argument).
This happens to work because before my patch the only use of the
macro was in jump.cc with
  /* First see if machine description supplies us way to reverse the
     comparison.  Give it priority over everything else to allow
     machine description to do tricks.  */
  if (GET_MODE_CLASS (mode) == MODE_CC
      && REVERSIBLE_CC_MODE (mode))
    return REVERSE_CONDITION (code, mode);
but in my patch it is used with GT rather than code.

2025-02-26  Jakub Jelinek  <jakub@redhat.com>

PR rtl-optimization/119002
* config/arm/arm.h (REVERSE_CONDITION): Use CODE - the macro
argument - in the macro rather than code.

[PR119021][LRA]: Fix rtl correctness check failure in LRA.

  Patch to fix PR115458 contained a code change in dealing with asm
errors to avoid cycling in reporting the error for asm gotos.  This
code was wrong and resulted in checking RTL correctness failure.  This
patch reverts the code change and solves cycling in asm error
reporting in a different way.

gcc/ChangeLog:

PR middle-end/119021
* lra.cc (lra_asm_insn_error): Use lra_invalidate_insn_data
instead of lra_update_insn_regno_info.
* lra-assigns.cc (lra_split_hard_reg_for): Restore old code.

[testsuite] add x86 effective target

I got tired of repeating the conditional that recognizes ia32 or
x86_64, and introduced 'x86' as a shorthand for that, adjusting all
occurrences in target-supports.exp, to set an example.  I found some
patterns that recognized i?86* and x86_64*, but I took those as likely
cut&pastos instead of trying to preserve those weirdnesses.

for  gcc/ChangeLog

* doc/sourcebuild.texi: Add x86 effective target.

for  gcc/testsuite/ChangeLog

* lib/target-supports.exp (check_effective_target_x86): New.
Replace all uses of i?86-*-* and x86_64-*-* in this file.

[testsuite] adjust expectations of x86 vect-simd-clone tests

Some vect-simd-clone tests fail when targeting ancient x86 variants,
because the expected transformations only take place with -msse4 or
higher.

So arrange for these tests to take an -msse4 option on x86, so that
the expected vectorization takes place, but decay to a compile test if
vect.exp would enable execution but the target doesn't have an sse4
runtime.  This requires the new dg-do-if to override the action on a
target while retaining the default action on others, instead of
disabling the test.

We can count on avx512f compile-time support for these tests, because
vect_simd_clones requires that on x86, and that implies sse4 support,
so we need not complicate the scan conditionals with tests for sse4,
except on the last test.

for  gcc/ChangeLog

* doc/sourcebuild.texi (dg-do-if): Document.

for  gcc/testsuite/ChangeLog

* lib/target-supports-dg.exp (dg-do-if): New.
* gcc.dg/vect/vect-simd-clone-16f.c: Use -msse4 on x86, and
skip in case execution is enabled but the runtime isn't.
* gcc.dg/vect/vect-simd-clone-17f.c: Likewise.
* gcc.dg/vect/vect-simd-clone-18f.c: Likewise.
* gcc.dg/vect/vect-simd-clone-20.c: Likewise, but only skip
the scan test.

simple-diagnostic-path: Inline two trivial methods [PR116143]

Various plugin tests fail with --enable-checking=release, because the
num_events and num_threads methods of simple_diagnostic_path are only used
inside of #if CHECKING_P code inside of GCC proper and then tested inside of
some plugin tests.  So, with --enable-checking=yes they are compiled into
cc1/cc1plus etc. binaries and plugins can call those, but with
--enable-checking=release they are optimized away (at least for LTO builds).

As they are trivial, the following patch just defines them inline, so that
the plugin tests get their definitions directly and don't have to rely
on cc1/cc1plus etc. exporting those.

2025-02-26  Jakub Jelinek  <jakub@redhat.com>

PR testsuite/116143
* simple-diagnostic-path.h (simple_diagnostic_path::num_events): Define
inline.
(simple_diagnostic_path::num_threads): Likewise.
* simple-diagnostic-path.cc (simple_diagnostic_path::num_events):
Remove out of line definition.
(simple_diagnostic_path::num_threads): Likewise.

Fortran: Remove SAVE_EXPR on lhs in assign [PR108233]

With vectorial shaped datatypes like e.g. complex numbers, fold_convert
inserts a SAVE_EXPR.  Using that on the lhs in an assignment prevented
the update of the variable, when in a coarray.

PR fortran/108233

gcc/fortran/ChangeLog:

* trans-expr.cc (gfc_trans_assignment_1): Remove SAVE_EXPR on lhs.

gcc/testsuite/ChangeLog:

* gfortran.dg/coarray/complex_1.f90: New test.

testsuite: Add pragma novector to more tests [PR118464]

These loops will now vectorize the entry finding
loops.  As such we get more failures because they
were not expecting to be vectorized.

Fixed by adding #pragma GCC novector.

gcc/testsuite/ChangeLog:

PR tree-optimization/118464
PR tree-optimization/116855
* g++.dg/ext/pragma-unroll-lambda-lto.C: Add pragma novector.
* gcc.dg/tree-ssa/gen-vect-2.c: Likewise.
* gcc.dg/tree-ssa/gen-vect-25.c: Likewise.
* gcc.dg/tree-ssa/gen-vect-32.c: Likewise.
* gcc.dg/tree-ssa/ivopt_mult_2g.c: Likewise.
* gcc.dg/tree-ssa/ivopts-5.c: Likewise.
* gcc.dg/tree-ssa/ivopts-6.c: Likewise.
* gcc.dg/tree-ssa/ivopts-7.c: Likewise.
* gcc.dg/tree-ssa/ivopts-8.c: Likewise.
* gcc.dg/tree-ssa/ivopts-9.c: Likewise.
* gcc.dg/tree-ssa/predcom-dse-1.c: Likewise.
* gcc.dg/tree-ssa/predcom-dse-10.c: Likewise.
* gcc.dg/tree-ssa/predcom-dse-11.c: Likewise.
* gcc.dg/tree-ssa/predcom-dse-12.c: Likewise.
* gcc.dg/tree-ssa/predcom-dse-2.c: Likewise.
* gcc.dg/tree-ssa/predcom-dse-3.c: Likewise.
* gcc.dg/tree-ssa/predcom-dse-4.c: Likewise.
* gcc.dg/tree-ssa/predcom-dse-5.c: Likewise.
* gcc.dg/tree-ssa/predcom-dse-6.c: Likewise.
* gcc.dg/tree-ssa/predcom-dse-7.c: Likewise.
* gcc.dg/tree-ssa/predcom-dse-8.c: Likewise.
* gcc.dg/tree-ssa/predcom-dse-9.c: Likewise.
* gcc.target/i386/pr90178.c: Likewise.

Daily bump.

libphobos: Generate test files for phobos testsuite

Extracts all public unittests from libphobos/src and emits them as
standalone tests in the testsuite using the tests_extractor script.

Compiling every module in the Phobos library with unittests included is
computationally expensive, and these tests are now only ran when
GCC_TEST_RUN_EXPENSIVE is not empty.

When instead just compiling the unittests and linking in the module
under test, this has been observed to reduce the time spent running the
testsuite by more than half.

libphobos/ChangeLog:

* testsuite/libphobos.phobos/shared/phobos-shared.exp: Require
is-effective-target run_expensive_tests.
* testsuite/libphobos.phobos/static/phobos-static.exp: Likewise.
* testsuite/libphobos.phobos/phobos.exp: New test.
* testsuite/libphobos.phobos/std_algorithm_comparison.d: New test.
* testsuite/libphobos.phobos/std_algorithm_iteration.d: New test.
* testsuite/libphobos.phobos/std_algorithm_mutation.d: New test.
* testsuite/libphobos.phobos/std_algorithm_searching.d: New test.
* testsuite/libphobos.phobos/std_algorithm_setops.d: New test.
* testsuite/libphobos.phobos/std_algorithm_sorting.d: New test.
* testsuite/libphobos.phobos/std_array.d: New test.
* testsuite/libphobos.phobos/std_ascii.d: New test.
* testsuite/libphobos.phobos/std_base64.d: New test.
* testsuite/libphobos.phobos/std_bigint.d: New test.
* testsuite/libphobos.phobos/std_bitmanip.d: New test.
* testsuite/libphobos.phobos/std_checkedint.d: New test.
* testsuite/libphobos.phobos/std_complex.d: New test.
* testsuite/libphobos.phobos/std_concurrency.d: New test.
* testsuite/libphobos.phobos/std_container_array.d: New test.
* testsuite/libphobos.phobos/std_container_binaryheap.d: New test.
* testsuite/libphobos.phobos/std_container_dlist.d: New test.
* testsuite/libphobos.phobos/std_container_rbtree.d: New test.
* testsuite/libphobos.phobos/std_container_slist.d: New test.
* testsuite/libphobos.phobos/std_container_util.d: New test.
* testsuite/libphobos.phobos/std_conv.d: New test.
* testsuite/libphobos.phobos/std_csv.d: New test.
* testsuite/libphobos.phobos/std_datetime_date.d: New test.
* testsuite/libphobos.phobos/std_datetime_interval.d: New test.
* testsuite/libphobos.phobos/std_datetime_package.d: New test.
* testsuite/libphobos.phobos/std_datetime_stopwatch.d: New test.
* testsuite/libphobos.phobos/std_datetime_systime.d: New test.
* testsuite/libphobos.phobos/std_datetime_timezone.d: New test.
* testsuite/libphobos.phobos/std_demangle.d: New test.
* testsuite/libphobos.phobos/std_digest_crc.d: New test.
* testsuite/libphobos.phobos/std_digest_hmac.d: New test.
* testsuite/libphobos.phobos/std_digest_md.d: New test.
* testsuite/libphobos.phobos/std_digest_murmurhash.d: New test.
* testsuite/libphobos.phobos/std_digest_package.d: New test.
* testsuite/libphobos.phobos/std_digest_ripemd.d: New test.
* testsuite/libphobos.phobos/std_digest_sha.d: New test.
* testsuite/libphobos.phobos/std_encoding.d: New test.
* testsuite/libphobos.phobos/std_exception.d: New test.
* testsuite/libphobos.phobos/std_experimental_allocator_building_blocks_affix_allocator.d:
New test.
* testsuite/libphobos.phobos/std_experimental_allocator_building_blocks_aligned_block_list.d:
New test.
* testsuite/libphobos.phobos/std_experimental_allocator_building_blocks_allocator_list.d:
New test.
* testsuite/libphobos.phobos/std_experimental_allocator_building_blocks_ascending_page_allocator.d:
New test.
* testsuite/libphobos.phobos/std_experimental_allocator_building_blocks_bitmapped_block.d:
New test.
* testsuite/libphobos.phobos/std_experimental_allocator_building_blocks_bucketizer.d:
New test.
* testsuite/libphobos.phobos/std_experimental_allocator_building_blocks_fallback_allocator.d:
New test.
* testsuite/libphobos.phobos/std_experimental_allocator_building_blocks_free_list.d:
New test.
* testsuite/libphobos.phobos/std_experimental_allocator_building_blocks_kernighan_ritchie.d:
New test.
* testsuite/libphobos.phobos/std_experimental_allocator_building_blocks_quantizer.d:
New test.
* testsuite/libphobos.phobos/std_experimental_allocator_building_blocks_region.d: New test.
* testsuite/libphobos.phobos/std_experimental_allocator_building_blocks_scoped_allocator.d:
New test.
* testsuite/libphobos.phobos/std_experimental_allocator_building_blocks_segregator.d:
New test.
* testsuite/libphobos.phobos/std_experimental_allocator_building_blocks_stats_collector.d:
New test.
* testsuite/libphobos.phobos/std_experimental_allocator_common.d: New test.
* testsuite/libphobos.phobos/std_experimental_allocator_gc_allocator.d: New test.
* testsuite/libphobos.phobos/std_experimental_allocator_mallocator.d: New test.
* testsuite/libphobos.phobos/std_experimental_allocator_package.d: New test.
* testsuite/libphobos.phobos/std_experimental_allocator_showcase.d: New test.
* testsuite/libphobos.phobos/std_experimental_allocator_typed.d: New test.
* testsuite/libphobos.phobos/std_file.d: New test.
* testsuite/libphobos.phobos/std_format_package.d: New test.
* testsuite/libphobos.phobos/std_format_read.d: New test.
* testsuite/libphobos.phobos/std_format_spec.d: New test.
* testsuite/libphobos.phobos/std_format_write.d: New test.
* testsuite/libphobos.phobos/std_functional.d: New test.
* testsuite/libphobos.phobos/std_getopt.d: New test.
* testsuite/libphobos.phobos/std_int128.d: New test.
* testsuite/libphobos.phobos/std_internal_cstring.d: New test.
* testsuite/libphobos.phobos/std_internal_scopebuffer.d: New test.
* testsuite/libphobos.phobos/std_json.d: New test.
* testsuite/libphobos.phobos/std_logger_core.d: New test.
* testsuite/libphobos.phobos/std_logger_nulllogger.d: New test.
* testsuite/libphobos.phobos/std_math_algebraic.d: New test.
* testsuite/libphobos.phobos/std_math_exponential.d: New test.
* testsuite/libphobos.phobos/std_math_hardware.d: New test.
* testsuite/libphobos.phobos/std_math_operations.d: New test.
* testsuite/libphobos.phobos/std_math_remainder.d: New test.
* testsuite/libphobos.phobos/std_math_rounding.d: New test.
* testsuite/libphobos.phobos/std_math_traits.d: New test.
* testsuite/libphobos.phobos/std_math_trigonometry.d: New test.
* testsuite/libphobos.phobos/std_meta.d: New test.
* testsuite/libphobos.phobos/std_mmfile.d: New test.
* testsuite/libphobos.phobos/std_numeric.d: New test.
* testsuite/libphobos.phobos/std_outbuffer.d: New test.
* testsuite/libphobos.phobos/std_package.d: New test.
* testsuite/libphobos.phobos/std_parallelism.d: New test.
* testsuite/libphobos.phobos/std_path.d: New test.
* testsuite/libphobos.phobos/std_random.d: New test.
* testsuite/libphobos.phobos/std_range_interfaces.d: New test.
* testsuite/libphobos.phobos/std_range_package.d: New test.
* testsuite/libphobos.phobos/std_range_primitives.d: New test.
* testsuite/libphobos.phobos/std_regex_package.d: New test.
* testsuite/libphobos.phobos/std_signals.d: New test.
* testsuite/libphobos.phobos/std_socket.d: New test.
* testsuite/libphobos.phobos/std_stdio.d: New test.
* testsuite/libphobos.phobos/std_string.d: New test.
* testsuite/libphobos.phobos/std_sumtype.d: New test.
* testsuite/libphobos.phobos/std_traits.d: New test.
* testsuite/libphobos.phobos/std_typecons.d: New test.
* testsuite/libphobos.phobos/std_typetuple.d: New test.
* testsuite/libphobos.phobos/std_uni_package.d: New test.
* testsuite/libphobos.phobos/std_uri.d: New test.
* testsuite/libphobos.phobos/std_utf.d: New test.
* testsuite/libphobos.phobos/std_uuid.d: New test.
* testsuite/libphobos.phobos/std_variant.d: New test.
* testsuite/libphobos.phobos/std_zlib.d: New test.

libstdc++: add support for constexpr stable_sort (P2562R1)

stable_sort has been made constexpr in C++26. Apart from plastering a
few functions with constexpr, there's an implementation challenge, that
is: stable_sort takes different codepaths in case extra memory can be
allocated. Rather than doing some major refactorings, simply use the
non-allocating path during constant evaluation. That's the same codepath
used when extra memory could not be allocated, as well as by
freestanding.

libstdc++-v3/ChangeLog:

* include/bits/algorithmfwd.h (stable_sort): Add constexpr.
* include/bits/ranges_algo.h (__stable_sort_fn): Add constexpr
to the function call operators.
* include/bits/stl_algo.h (__stable_sort): Add constexpr.
During constant evaluation, always use the non-allocating path.
(stable_sort): Add constexpr.
(__inplace_stable_sort): Likewise.
(__merge_without_buffer): Likewise.
* include/bits/version.def (constexpr_algorithms): Bump value
for C++26.
* include/bits/version.h: Regnerate.
* testsuite/25_algorithms/cpp_lib_constexpr.cc: Test the bumped
feature-testing macro.
* testsuite/25_algorithms/headers/algorithm/synopsis.cc: Adapt
the test to constexpr stable_sort.
* testsuite/25_algorithms/stable_sort/constexpr.cc: New test.

Signed-off-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>

libstdc++: add a constexpr macro for C++26

Following the precedent of _GLIBCXX20_CONSTEXPR.

It will be used to decorate some functions which have been made
constexpr in C++26 (for instance P2562R1, and maybe P3508R0, P3369R0,
...).

libstdc++-v3/ChangeLog:

* include/bits/c++config (_GLIBCXX26_CONSTEXPR): New macro.

Signed-off-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>

libstdc++: Fix typo in std::fill SFINAE constraint [PR93059]

The r15-4321-gd8ef4471cb9c9f change incorrectly used __value as the
member of the __memcpyable_integer trait, but it should have been
__width. That meant this overload was not being used for _Tp != _Up.

Also return after doing the loop for the consteval case. The missing
return wasn't causing incorrect behaviour because the consteval loop
increments the iterator until it equals the end of the range, so the
memset isn't done.  But it's still better to return and not even try
to do the memset.

libstdc++-v3/ChangeLog:

PR libstdc++/93059
* include/bits/stl_algobase.h (__fill_a1): Fix typo in SFINAE
constraint.

i386: Fix pr101950-2.c [PR115028]

So what is happening here is that after r15-268-g9dbff9c05520a7,
a move instruction still exists after combine and the register
allocator choses different register allocation order for the xor
and because the input operand of lzcntq is not the same as output
operand, there is an extra xor that happens (due to an errata).

This fixes the testcase by using loading from a pointer instead
of a function argument directly. The register allocator has more
freedom since the load has no hard register associated with it (rdi)
so it can be in eax register right away.

Tested for both -m32 and -m64 on x86_64-linux-gnu.

gcc/testsuite/ChangeLog:

PR testsuite/115028
* gcc.target/i386/pr101950-2.c: Use a pointer argument instead
of the argument directly.

Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>

libphobos: Add script for extracting unittests from phobos

This script parses all unittests annotated with three slashes (`///')
and extracts them into a standalone test case.  The intended use is for
generating inexpensive tests to be ran for the phobos testsuite.

libphobos/ChangeLog:

* scripts/.gitignore: Add tests_extractor.
* scripts/README: Document tests_extractor.d.
* scripts/tests_extractor.d: New file.

libphobos: Organize druntime and phobos tests under common directory

The druntime and druntime_shared tests are identical, save for one
compiled with `-static-libphobos' and the other `-shared-libphobos'.
Move them to libphobos.druntime/static and libphobos.druntime/shared
respectively.  This has also been done for libphobos.phobos.

libphobos/ChangeLog:

* testsuite/libphobos.druntime_shared/druntime_shared.exp: Move to...
* testsuite/libphobos.druntime/shared/druntime-shared.exp: ...here.
* testsuite/libphobos.druntime/druntime.exp: Move to...
* testsuite/libphobos.druntime/static/druntime-static.exp: ...here.
* testsuite/libphobos.phobos_shared/phobos_shared.exp: Move to...
* testsuite/libphobos.phobos/shared/phobos-shared.exp: ...here.
* testsuite/libphobos.phobos/phobos.exp: Move to...
* testsuite/libphobos.phobos/static/phobos-static.exp: ...here.

libstdc++: [_Hashtable] Fix hash code cache usage when stateful hash functor

It is wrong to reuse a cached hash code from another container when this code depends
on the state of the container's Hash functor.

Add checks that Hash functor is stateless before reusing the cached hash code.

libstdc++-v3/ChangeLog:

* include/bits/hashtable_policy.h
(_Hash_code_base::_M_copy_code, _Hash_code_base::_M_store_code): Remove.
* include/bits/hashtable.h (_M_hash_code_ext): New.
(_M_merge_multi(_Hashtable&)): Use latter.
(_M_copy_code): New.
(_M_assign): Use latter.
(_M_bucket_index_ex): New.
(_M_equals): Use latter.
(_M_store_code): New.
(_M_src_hash_code): Remove key_type parameter.
* testsuite/23_containers/unordered_map/modifiers/merge.cc (test10): New
test case.

doc: update C++98 bootstrap note

r10-11132 uses C++11 default member initializers, which breaks bootstrapping
with a C++98 compiler.

gcc/ChangeLog:

* doc/install.texi: 10.5 won't bootstrap with C++98.

[PR115458][LRA]: Run split sub-pass more times

  In this PR case LRA needs to provide too many hard regs for insn
reloads, where some reload pseudos require 8 aligned regs for
themselves.  As the last attempt, LRA tries to split live ranges of
hard regs for insn reload pseudos.  It is a very rare case.  An
inheritance pseudo involving a reload pseudo of the insn can be
spilled in the assignment sub-pass run right after splitting and we need
to run split sub-pass for the inheritance pseudo now.

gcc/ChangeLog:

PR target/115458
* lra-int.h (LRA_MAX_FAILED_SPLITS): Define and check its value.
(lra_split_hard_reg_for): Change prototype.
* lra.cc (lra): Try to split hard reg range several times after a
failure.
* lra-assigns.cc (lra_split_hard_reg_for): Add an arg, a flag of
giving up.  Report asm error and nullify the asm insn depending on
the arg value.

gcc/testsuite/ChangeLog:

PR target/115458
* g++.target/riscv/pr115458.C: New.

pru: Fix pru_pragma_ctable_entry diagnostics [PR118991]

HOST_WIDE_INT_PRINT* macros aren't supposed to be used in
gcc-internal-format format strings, we have the w modifier for HOST_WIDE_INT
in that case, the HOST_WIDE_INT_PRINT* macros might not work properly on
some hosts (e.g. mingw32 has HOST_LONG_LONG_FORMAT "I64" and that is
something pretty-print doesn't handle, while it handles "ll" for long long)
and also the use of macros in the middle of format strings breaks
translations (both that exgettext can't retrieve the string from there
and we get
 #: config/pru/pru-pragma.cc:61
 msgid "%<CTABLE_ENTRY%> index %"
 msgstr ""

 #: config/pru/pru-pragma.cc:64
 msgid "redefinition of %<CTABLE_ENTRY %"
 msgstr ""
in po/gcc.pot and also the macros are different on different hosts,
so even if exgettext extracted say "%<CTABLE_ENTRY%> index %lld is not valid"
it could be translated on some hosts but not e.g. mingw32).

So, the following patch just uses %wd instead.

Tested it before/after the
patch on
 #pragma ctable_entry 12 0x48040000
 #pragma ctable_entry 1024 0x48040000
 #pragma ctable_entry 12 0x48040001
and the result is the same.

2025-02-25  Jakub Jelinek  <jakub@redhat.com>

PR translation/118991
* config/pru/pru-pragma.cc (pru_pragma_ctable_entry): Use %wd
instead of %" HOST_WIDE_INT_PRINT "d to print a hwi in error.

libstdc++: Implement LWG 4027 change to possibly-const-range [PR118083]

LWG 4027 effectively makes the const range access CPOs ranges::cfoo behave
more consistently across C++23 and C++20 (pre-P2278R4) and also more
consistently with the std::cfoo range accessors, as the below testcase
adjustments demonstrate (which mostly consist of reverting workarounds
added by r14-3771-gf12e26f3496275 and r13-7186-g0d94c6df183375).

In passing fix PR118083 which reports that the input_range constraint on
possibly-const-range is missing in our implementation.  A consequence of
this is that the const range access CPOs now consistently reject a non-range
argument, and so in some our of tests we need to introduce otherwise
unused begin/end members.

PR libstdc++/118083

libstdc++-v3/ChangeLog:

* include/bits/ranges_base.h
(ranges::__access::__possibly_const_range): Adjust logic as per
LWG 4027.  Add missing input_range constraint.
* testsuite/std/ranges/access/cbegin.cc (test05): Verify LWG
4027 testcases.
* testsuite/std/ranges/access/cdata.cc: Adjust, simplify and
consolidate some tests after the above.
* testsuite/std/ranges/access/cend.cc: Likewise.
* testsuite/std/ranges/access/crbegin.cc: Likewise.
* testsuite/std/ranges/access/crend.cc: Likewise.
* testsuite/std/ranges/adaptors/join.cc: Likewise.
* testsuite/std/ranges/adaptors/take_while.cc: Likewise.
* testsuite/std/ranges/adaptors/transform.cc: Likewise.

Reviewed-by: Jonathan Wakely <jwakely@redhat.com>

libphobos: Add scripts to update Makefile.am after an upstream merge

These two scripts have been used for updating Makefile.am whenever
there's been a file added/removed from either Druntime or Phobos since
the start, but never included in the source tree.

libphobos/ChangeLog:

* libdruntime/Makefile.am: Update comment.
* libdruntime/Makefile.in: Regenerate.
* src/Makefile.am: Update comment.
* src/Makefile.in: Regenerate.
* scripts/.gitignore: New file.
* scripts/README: New file.
* scripts/gen_druntime_sources.d: New file.
* scripts/gen_phobos_sources.d: New file.

d/i386: Add CET TargetInfo key and predefined version [PR118654]

Adds a new i386 d_target_info_spec entry to handle requests for
`__traits(getTargetInfo, "CET")', and add predefined target version
`GNU_CET' when the option `-fcf-protecton' is used.

Both TargetInfo key and predefined version have been added to the D
front-end documentation.

In the library, `GNU_CET' replaces the existing use of the user-defined
version flag `CET' when building libphobos.

PR d/118654

gcc/ChangeLog:

* config/i386/i386-d.cc (ix86_d_target_versions): Predefine GNU_CET.
(ix86_d_handle_target_cf_protection): New.
(ix86_d_register_target_info): Add 'CET' TargetInfo key.

gcc/d/ChangeLog:

* implement-d.texi: Document CET version and traits key.

libphobos/ChangeLog:

* Makefile.in: Regenerate.
* configure: Regenerate.
* configure.ac: Remove CET_DFLAGS.
* libdruntime/Makefile.am: Replace CET_DFLAGS with CET_FLAGS.
* libdruntime/Makefile.in: Regenerate.
* libdruntime/core/thread/fiber/package.d: Replace CET with GNU_CET.
* src/Makefile.am: Replace CET_DFLAGS with CET_FLAGS.
* src/Makefile.in: Regenerate.
* testsuite/Makefile.in: Regenerate.
* testsuite/testsuite_flags.in: Replace CET_DFLAGS with CET_FLAGS.

gcc/testsuite/ChangeLog:

* gdc.dg/target/i386/i386.exp: New test.
* gdc.dg/target/i386/targetinfo_CET.d: New test.

d: Increase max parallelism of the D testsuite

It was noticed that when running the testsuite for gdc and libphobos in
parallel, this was capped at 10 simultaneous jobs each.  Increase this
limit to 128, which enables running for example `make check-d -j48` to
complete in half the time.

gcc/d/ChangeLog:

* Make-lang.in (check_gdc_parallelize): Increase to 128.

libphobos/ChangeLog:

* testsuite/Makefile.am (check_p_subno): Remove variable.
(check_p_subdirs): Increase default parallel slots to 128.
* testsuite/Makefile.in: Regenerate.

Fortran: Fix detection of descriptor arrays in coarray [PR107635]

Look at the formal arguments generated type in the function declaration
to figure if an argument is a descriptor arrays.  Fix handling of class
types while splitting coarray expressions.

PR fortran/107635

gcc/fortran/ChangeLog:

* coarray.cc (fixup_comp_refs): For class types set correct
component (class) type.
(split_expr_at_caf_ref): Provide location.
* trans-intrinsic.cc (conv_caf_send_to_remote): Look at
generated formal argument and not declared one to detect
descriptor arrays.
(conv_caf_sendget): Same.

Fortran: Use correct size when transferring between images [PR107635]

gcc/fortran/ChangeLog:

PR fortran/107635

* trans-intrinsic.cc (conv_caf_sendget): Use the size of data
transferred between the two images and not the descritor's size.

openmp: Mark OpenMP atomic write expression as read [PR119000]

The following testcase was emitting false positive warning that
the rhs of #pragma omp atomic write was stored but not read,
when the atomic actually does read it.  The following patch
fixes that by calling default_function_array_read_conversion
on it, so that it is marked as read as well as converted from
lvalue to rvalue.
Furthermore, the code had
if (code == NOP_EXPR) ... else ... if (code == NOP_EXPR) ...
with none of ... parts changing code, so I've merged the two ifs.

2025-02-25  Jakub Jelinek  <jakub@redhat.com>

PR c/119000
* c-parser.cc (c_parser_omp_atomic): For omp write call
default_function_array_read_conversion on the rhs expression.
Merge the two adjacent if (code == NOP_EXPR) blocks.

* c-c++-common/gomp/pr119000.c: New test.

openmp: Fix handling of declare target statics with array type which need destruction [PR118876]

The following testcase ICEs because it attempts to emit the __tcfa function twice,
once when handling the host destruction and once when handling nohost destruction.

This patch fixes it by using __omp_tcfa function for the nohost case and marks it
with the needed "omp declare target" and "omp declare target nohost" attributes.

2025-02-25  Jakub Jelinek  <jakub@redhat.com>

PR c++/118876
* cp-tree.h (register_dtor_fn): Add a bool argument defaulted to false.
* decl.cc (start_cleanup_fn): Add OMP_TARGET argument, use
"__omp_tcf" prefix rather than "__tcf" in that case.  Add
"omp declare target" and "omp declare target nohost" attributes
to the fndecl.
(register_dtor_fn): Add OMP_TARGET argument, pass it down to
start_cleanup_fn.
* decl2.cc (one_static_initialization_or_destruction): Add OMP_TARGET
argument, pass it down to register_dtor_fn.
(emit_partial_init_fini_fn): Pass omp_target to
one_static_initialization_or_destruction.
(handle_tls_init): Pass false to
one_static_initialization_or_destruction.

* g++.dg/gomp/pr118876.C: New test.

c++: Fix range for with PMFs [PR118923]

The following testcases segfault because the new range for -frange-for-ext-temps
temporary extension extends even the internal TARGET_EXPRs created by
get_member_function_from_ptrfunc.

The following patch fixes that by using get_internal_target_expr for those
instead of force_target_expr (similarly in cp_finish_decl and
build_comparison_op) and using force_target_expr inside of
get_internal_target_expr.

2025-02-25  Jakub Jelinek  <jakub@redhat.com>

PR c++/118923
* tree.cc (get_internal_target_expr): Use force_target_expr
instead of build_target_expr_with_type.
* typeck.cc (get_member_function_from_ptrfunc): Use
get_internal_target_expr instead of force_target_expr.
* decl.cc (cp_finish_decl): Likewise.
* method.cc (build_comparison_op): Likewise.

* g++.dg/cpp0x/pr118923.C: New test.
* g++.dg/cpp1y/pr118923.C: New test.

Daily bump.

RISC-V: Include pattern stmts for dynamic LMUL computation [PR114516].

When scanning for program points, i.e. vector statements, we're missing
pattern statements.  In PR114516 this becomes obvious as we choose
LMUL=8 assuming there are only three statements but the divmod pattern
adds another three.  Those push us beyond four registers so we need to
switch to LMUL=4.

This patch adds pattern statements to the program points which helps
calculate a better register pressure estimate.

PR target/114516

gcc/ChangeLog:

* config/riscv/riscv-vector-costs.cc (compute_estimated_lmul):
Add pattern statements to program points.

gcc/testsuite/ChangeLog:

* gcc.dg/vect/costmodel/riscv/rvv/pr114516.c: New test.

vect: Use original LHS type for gather pattern [PR118950].

In PR118950 we do not zero masked elements in a gather load.
While recognizing a gather/scatter pattern we do not use the original
type of the LHS.  This matters because the type can differ with bool
patterns (e.g. _Bool vs unsigned char) and we don't notice the need
for zeroing out the padding bytes.

This patch just uses the original LHS's type.

PR middle-end/118950

gcc/ChangeLog:

* tree-vect-patterns.cc (vect_recog_gather_scatter_pattern): Use
original LHS's type.

gcc/testsuite/ChangeLog:

* gcc.target/riscv/rvv/autovec/pr118950.c: New test.

reassoc: Fix up optimize_range_tests_to_bit_test [PR118915]

The following testcase is miscompiled due to a bug in
optimize_range_tests_to_bit_test.  It is trying to optimize
check for a in [-34,-34] or [-26,-26] or [-6,-6] or [-4,inf] ranges.
Another reassoc optimization folds the the test for the first
two ranges into (a + 34U) & ~8U in [0U,0U] range, and extract_bit_test_mask
actually has code to virtually undo it and treat that again as test
for a being -34 or -26.  The problem is that optimize_range_tests_to_bit_test
remembers in the type variable TREE_TYPE (ranges[i].exp); from the first
range.  If extract_bit_test_mask doesn't do that virtual undoing of the
BIT_AND_EXPR handling, that is just fine, the returned exp is ranges[i].exp.
But if the first range is BIT_AND_EXPR, the type could be different, the
BIT_AND_EXPR form has the optional cast to corresponding unsigned type
in order to avoid introducing UB.  Now, type was used to fill in the
max value if ranges[j].high was missing in subsequently tested range,
and so in this particular testcase the [-4,inf] range which was
signed int and so [-4,INT_MAX] was treated as [-4,UINT_MAX] instead.
And we were subtracting values of 2 different types and trying to make
sense out of that.

The following patch fixes this by using the type of the low bound
(which is always non-NULL) for the max value of the high bound instead.

2025-02-24  Jakub Jelinek  <jakub@redhat.com>

PR tree-optimization/118915
* tree-ssa-reassoc.cc (optimize_range_tests_to_bit_test): For
highj == NULL_TREE use TYPE_MAX_VALUE (TREE_TYPE (lowj)) rather
than TYPE_MAX_VALUE (type).

* gcc.c-torture/execute/pr118915.c: New test.

tree-optimization/118973 - stray abnormal edge after DCE

DCE preserves stmts performing abnormal control flow transfer but
currently has an exception for replaceable allocations and cxa_atexit
calls.  That results in a broken CFG since DCE isn't set up to prune
abnormal edges possibly hanging off those.

While we could try to add this handling, the following is the safe
fix at this point and more suitable for backporting.

PR tree-optimization/118973
* tree-ssa-dce.cc (mark_stmt_if_obviously_necessary): Calls
that alter control flow in unpredictable ways need to be
preserved.

* g++.dg/torture/pr118973.C: New testcase.

openmp: Fix diagnostics typo [PR118993]

There is a typo in one of the OpenMP gimplification diagnostics messages.
The following patch fixes that and adjusts tests which just copied that
message including typo to dg-warning regexps in 2 tests.

2025-02-24  Jakub Jelinek  <jakub@redhat.com>

PR middle-end/118993
* gimplify.cc (gimplify_scan_omp_clauses): Fix diagnostics typo,
undfined -> undefined.

* c-c++-common/gomp/allocate-18.c: Adjust dg-warning regex for
diagnostics typo fix.
* gfortran.dg/gomp/allocate-clause.f90: Likewise.

Use nonnull_if_nonzero attribute rather than nonnull on various builtins [PR117023]

On top of the
https://gcc.gnu.org/pipermail/gcc-patches/2024-November/668554.html
https://gcc.gnu.org/pipermail/gcc-patches/2024-November/668699.html
https://gcc.gnu.org/pipermail/gcc-patches/2024-November/668700.html
patches the following patch adds nonnull_if_nonzero attribute(s) to
various builtins instead of or in addition to nonnull attribute.

The patch adjusts builtins (when we have them) corresponding to the APIs
mentioned in the C2Y N3322 paper:
1) strndup and memset get one nonnull_if_nonzero attribute instead of
   nonnull
2) memcpy, memmove, strncpy, memcmp, strncmp get two nonnull_if_nonzero
   attributes instead of nonnull
3) strncat has nonnull without argument changed to nonnull (1) and
   gets one nonnull_if_nonzero for the src argument (maybe it needs
   to be clarified in C2Y, but I really think first argument to strncat
   and wcsncat shouldn't be NULL even for n == 0, because NULL doesn't
   point to NULL terminated string and one can't append anything to it;
   and various implementations in the wild including glibc will crash
   with NULL first argument (x86_64 avx+ doesn't though)

Such changes are done also to the _chk suffixed counterparts of the
builtins.

Furthermore I've changed a couple of builtins for POSIX functions which
aren't covered by ISO C, but I'd expect if/when POSIX incorporates C2Y
it would do the same changes.  In particular

4) strnlen gets one nonnull_if_nonzero instead of nonnull
5) mempcpy and stpncpy get two nonnull_if_nonzero instead of nonnull
   and lose returns_nonnull attribute; this is kind of unfortunate
   but I think in the spirit of N3322 mempcpy (NULL, src, 0) should
   return NULL (i.e. dest + n aka NULL + 0, now valid) and it is hard to
   express returns non-NULL if first argument is non-NULL or third argument
   is non-zero

I'm not really sure about fread/fwrite, N3322 doesn't mention those,
can the first argument be NULL if third argument is 0?  What about
if second argument is 0?  Can the fourth argument be NULL in such cases?

And of course, when not using builtins the glibc headers will affect stuff
too, so we'll need to wait for N3322 implementation there too (possibly
by dropping the nonnull attributes and perhaps conditionally replacing them
with this new one if the compiler supports them).

2025-02-24  Jakub Jelinek  <jakub@redhat.com>

PR c/117023
gcc/
* builtin-attrs.def (ATTR_NONNULL_IF_NONZERO): New DEF_ATTR_IDENT.
(ATTR_NOTHROW_NONNULL_IF12_LEAF, ATTR_NOTHROW_NONNULL_IF13_LEAF,
ATTR_NOTHROW_NONNULL_IF123_LEAF, ATTR_NOTHROW_NONNULL_IF23_LEAF,
ATTR_NOTHROW_NONNULL_1_IF23_LEAF, ATTR_PURE_NOTHROW_NONNULL_IF12_LEAF,
ATTR_PURE_NOTHROW_NONNULL_IF13_LEAF,
ATTR_PURE_NOTHROW_NONNULL_IF123_LEAF,
ATTR_WARN_UNUSED_RESULT_NOTHROW_NONNULL_IF12_LEAF,
ATTR_MALLOC_WARN_UNUSED_RESULT_NOTHROW_NONNULL_IF12_LEAF): New
DEF_ATTR_TREE_LIST.
* builtins.def (BUILT_IN_STRNDUP): Use
ATTR_MALLOC_WARN_UNUSED_RESULT_NOTHROW_NONNULL_IF12_LEAF instead of
ATTR_MALLOC_WARN_UNUSED_RESULT_NOTHROW_NONNULL_LEAF.
(BUILT_IN_STRNCAT, BUILT_IN_STRNCAT_CHK): Use
ATTR_NOTHROW_NONNULL_1_IF23_LEAF instead of ATTR_NOTHROW_NONNULL_LEAF.
(BUILT_IN_BCOPY, BUILT_IN_MEMCPY, BUILT_IN_MEMCPY_CHK,
BUILT_IN_MEMMOVE, BUILT_IN_MEMMOVE_CHK,  BUILT_IN_STRNCPY,
BUILT_IN_STRNCPY_CHK): Use ATTR_NOTHROW_NONNULL_IF123_LEAF instead of
ATTR_NOTHROW_NONNULL_LEAF.
(BUILT_IN_MEMPCPY, BUILT_IN_MEMPCPY_CHK, BUILT_IN_STPNCPY,
BUILT_IN_STPNCPY_CHK): Use ATTR_NOTHROW_NONNULL_IF123_LEAF instead of
ATTR_RETNONNULL_NOTHROW_LEAF.
(BUILT_IN_BZERO, BUILT_IN_MEMSET, BUILT_IN_MEMSET_CHK): Use
ATTR_NOTHROW_NONNULL_IF13_LEAF instead of ATTR_NOTHROW_NONNULL_LEAF.
(BUILT_IN_BCMP, BUILT_IN_MEMCMP, BUILT_IN_STRNCASECMP,
BUILT_IN_STRNCMP): Use ATTR_PURE_NOTHROW_NONNULL_IF123_LEAF instead of
ATTR_PURE_NOTHROW_NONNULL_LEAF.
(BUILT_IN_STRNLEN): Use ATTR_PURE_NOTHROW_NONNULL_IF12_LEAF instead of
ATTR_PURE_NOTHROW_NONNULL_LEAF.
(BUILT_IN_MEMCHR): Use ATTR_PURE_NOTHROW_NONNULL_IF13_LEAF instead of
ATTR_PURE_NOTHROW_NONNULL_LEAF.
gcc/testsuite/
* gcc.dg/builtins-nonnull.c (test_memfuncs, test_memfuncs_chk,
test_strfuncs, test_strfuncs_chk): Add if (n == 0) return; at the
start of the functions.
* gcc.dg/Wnonnull-2.c: Copy __builtin_* call statements where
appropriate 3 times, once with 0 length, once with n and once with
non-zero constant and expect warning only in the third case.
Formatting fixes.
* gcc.dg/Wnonnull-3.c: Copy __builtin_* call statements where
appropriate 3 times, once with 0 length, once with n and once with
n guarded with n != 0 and expect warning only in the third case.
Formatting fixes.
* gcc.dg/nonnull-3.c (foo): Use 16 instead of 0 in the calls added
for PR80936.
* gcc.dg/nonnull-11.c: New test.
* c-c++-common/ubsan/nonnull-1.c: Don't expect runtime diagnostics
for the __builtin_memcpy call.
* gcc.dg/tree-ssa/pr78154.c (f): Add dn argument and return early
if it is NULL.  Duplicate cases of builtins which have the first
argument changed from nonnull to nonnull_if_nonzero except stpncpy,
once with dn as first argument instead of d and once with constant
non-zero count rather than n.  Disable the stpncpy non-null check.
* gcc.dg/Wbuiltin-declaration-mismatch-14.c (test_builtin_calls):
Triplicate the strncmp calls, once with 1 last argument and expect
warning, once with n last argument and don't expect warning and
once with 0 last argument and don't expect warning.
* gcc.dg/Wbuiltin-declaration-mismatch-15.c (test_builtin_calls_fe):
Likewise.

analyzer: Handle nonnull_if_nonzero attribute [PR117023]

On top of the
https://gcc.gnu.org/pipermail/gcc-patches/2024-November/668554.html
patch which introduces the nonnull_if_nonzero attribute (because
C2Y is allowing NULL arguments on various calls like memcpy, memset,
strncpy etc. as long as the count is 0) the following patch adds just
limited handling of the attribute in the analyzer.

For nonnull attribute(s) we have the get_nonnull_args helper which
returns a bitmap, for nonnull_if_nonzero a function would need to
return a hash_map or something similar, I think it is better to
handle the attributes one by one.  This patch just handles the
non-zero INTEGER_CST (integer_nonzerop) count arguments, in other places
the above patch uses ranger to some extent, but I'm not familiar enough
with the analyzer to know if one can use the ranger, or should somehow
explain in data structures the conditional nature of the nonnull property,
the argument is nonnull only if some other argument is nonzero.

Also, analyzer uses get_nonnull_args in another spot when entering a frame,
not sure if anything can be done there (note the conditional nonnull
somehow, pass from callers if the argument is nonzero, ...).

Note, the testsuite changes aren't strictly necessary with just
the above and this patch, but will be with a patch I'm going to post
soon.

2025-02-24  Jakub Jelinek  <jakub@redhat.com>

PR c/117023
gcc/analyzer/
* sm-malloc.cc (malloc_state_machine::handle_nonnull): New private
method.
(malloc_state_machine::on_stmt): Use it for nonnull attribute arguments.
Handle also nonnull_if_nonzero attributes.
gcc/testsuite/
* c-c++-common/analyzer/call-summaries-malloc.c
(test_use_without_check): Pass 4 rather than sz to memset.
* c-c++-common/analyzer/strncpy-1.c (test_null_dst,
test_null_src): Pass 42 rather than count to strncpy.

RISC-V: Fix .cfi_offset directive when push/pop in zcmp

The incorrect cfi directive info breaks stack unwind in try/catch/cxa.

Before patch:
  cm.push {ra, s0-s2}, -16
  .cfi_offset 1, -12
  .cfi_offset 8, -8
  .cfi_offset 18, -4

After patch:
  cm.push {ra, s0-s2}, -16
  .cfi_offset 1, -16
  .cfi_offset 8, -12
  .cfi_offset 9, -8
  .cfi_offset 18, -4

gcc/ChangeLog:

* config/riscv/riscv.cc: Set multi push regs bits.

gcc/testsuite/ChangeLog:
* gcc.target/riscv/zcmp_push_gpr.c: New test.

Daily bump.

x86: Add tests for PR tree-optimization/82142

Verify that PR tree-optimization/82142 testcase is properly optimized.

PR tree-optimization/82142
* gcc.target/i386/pr82142a.c: New file.
* gcc.target/i386/pr82142b.c: Likewise.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>

Daily bump.

libstdc++: Fix bootstrap failure with --enable-vtable-verify [PR118981]

The compiler emits code with init_priority(99) for -fvtable-verify=std
and that creates a section conflict with the uses of init_priority(99)
that I recently added to src/c++20/tzdb.cc.

Change tzdb.cc to use a different priority to avoid the conflict.

libstdc++-v3/ChangeLog:

PR c++/118981
* src/c++20/tzdb.cc: Use init_priority(98) instead of
init_priority(99).

Turn test cases into UNSUPPORTED if running into 'sorry, unimplemented: dynamic stack allocation not supported'

In Subversion r217296 (Git commit e2acc079ff125a869159be45371dc0a29b230e92)
"Testsuite alloca fixes for ptx", effective-target 'alloca' was added to mark
up test cases that run into the nvptx back end's non-support of dynamic stack
allocation.  (Later, nvptx gained conditional support for that in
commit 3861d362ec7e3c50742fc43833fe9d8674f4070e
"nvptx: PTX 'alloca' for '-mptx=7.3'+, '-march=sm_52'+ [PR65181]", but on the
other hand, in commit f93a612fc4567652b75ffc916d31a446378e6613
"bpf: liberate R9 for general register allocation", the BPF back end joined
"the list of targets that do not support alloca in target-support.exp".

Manually maintaining the list of test cases requiring effective-target 'alloca'
is notoriously hard, gets out of date quickly: new test cases added to the test
suite may need to be analyzed and annotated, and over time annotations also may
need to be removed, in cases where the compiler learns to optimize out
'alloca'/VLA usage, for example.  This commit replaces (99 % of) the manual
annotations with an automatic scheme: turn test cases into UNSUPPORTED if
running into 'sorry, unimplemented: dynamic stack allocation not supported'.

gcc/testsuite/
* lib/target-supports.exp (check_effective_target_alloca):
Gracefully handle the case that we've not be called (indirectly)
from 'dg-test'.
* lib/gcc-dg.exp (proc gcc-dg-prune): Turn
'sorry, unimplemented: dynamic stack allocation not supported' into
UNSUPPORTED.
* c-c++-common/Walloca-larger-than.c: Don't
'dg-require-effective-target alloca'.
* c-c++-common/Warray-bounds-9.c: Likewise.
* c-c++-common/Warray-bounds.c: Likewise.
* c-c++-common/Wdangling-pointer-2.c: Likewise.
* c-c++-common/Wdangling-pointer-4.c: Likewise.
* c-c++-common/Wdangling-pointer-5.c: Likewise.
* c-c++-common/Wdangling-pointer.c: Likewise.
* c-c++-common/Wimplicit-fallthrough-7.c: Likewise.
* c-c++-common/Wsizeof-pointer-memaccess1.c: Likewise.
* c-c++-common/Wsizeof-pointer-memaccess2.c: Likewise.
* c-c++-common/Wstringop-truncation.c: Likewise.
* c-c++-common/Wunused-var-6.c: Likewise.
* c-c++-common/Wunused-var-8.c: Likewise.
* c-c++-common/analyzer/alloca-leak.c: Likewise.
* c-c++-common/analyzer/allocation-size-multiline-2.c: Likewise.
* c-c++-common/analyzer/allocation-size-multiline-3.c: Likewise.
* c-c++-common/analyzer/capacity-1.c: Likewise.
* c-c++-common/analyzer/capacity-3.c: Likewise.
* c-c++-common/analyzer/imprecise-floating-point-1.c: Likewise.
* c-c++-common/analyzer/infinite-recursion-alloca.c: Likewise.
* c-c++-common/analyzer/malloc-callbacks.c: Likewise.
* c-c++-common/analyzer/malloc-paths-8.c: Likewise.
* c-c++-common/analyzer/out-of-bounds-5.c: Likewise.
* c-c++-common/analyzer/out-of-bounds-diagram-11.c: Likewise.
* c-c++-common/analyzer/uninit-alloca.c: Likewise.
* c-c++-common/analyzer/write-to-string-literal-5.c: Likewise.
* c-c++-common/asan/alloca_loop_unpoisoning.c: Likewise.
* c-c++-common/auto-init-11.c: Likewise.
* c-c++-common/auto-init-12.c: Likewise.
* c-c++-common/auto-init-15.c: Likewise.
* c-c++-common/auto-init-16.c: Likewise.
* c-c++-common/builtins.c: Likewise.
* c-c++-common/dwarf2/vla1.c: Likewise.
* c-c++-common/gomp/pr61486-2.c: Likewise.
* c-c++-common/torture/builtin-clear-padding-4.c: Likewise.
* c-c++-common/torture/strub-run3.c: Likewise.
* c-c++-common/torture/strub-run4.c: Likewise.
* c-c++-common/torture/strub-run4c.c: Likewise.
* c-c++-common/torture/strub-run4d.c: Likewise.
* c-c++-common/torture/strub-run4i.c: Likewise.
* g++.dg/Walloca1.C: Likewise.
* g++.dg/Walloca2.C: Likewise.
* g++.dg/cpp0x/pr70338.C: Likewise.
* g++.dg/cpp1y/lambda-generic-vla1.C: Likewise.
* g++.dg/cpp1y/vla10.C: Likewise.
* g++.dg/cpp1y/vla2.C: Likewise.
* g++.dg/cpp1y/vla6.C: Likewise.
* g++.dg/cpp1y/vla8.C: Likewise.
* g++.dg/debug/debug5.C: Likewise.
* g++.dg/debug/debug6.C: Likewise.
* g++.dg/debug/pr54828.C: Likewise.
* g++.dg/diagnostic/pr70105.C: Likewise.
* g++.dg/eh/cleanup5.C: Likewise.
* g++.dg/eh/spbp.C: Likewise.
* g++.dg/ext/builtin_alloca.C: Likewise.
* g++.dg/ext/tmplattr9.C: Likewise.
* g++.dg/ext/vla10.C: Likewise.
* g++.dg/ext/vla11.C: Likewise.
* g++.dg/ext/vla12.C: Likewise.
* g++.dg/ext/vla15.C: Likewise.
* g++.dg/ext/vla16.C: Likewise.
* g++.dg/ext/vla17.C: Likewise.
* g++.dg/ext/vla23.C: Likewise.
* g++.dg/ext/vla3.C: Likewise.
* g++.dg/ext/vla6.C: Likewise.
* g++.dg/ext/vla7.C: Likewise.
* g++.dg/init/array24.C: Likewise.
* g++.dg/init/new47.C: Likewise.
* g++.dg/init/pr55497.C: Likewise.
* g++.dg/opt/pr78201.C: Likewise.
* g++.dg/template/vla2.C: Likewise.
* g++.dg/torture/Wsizeof-pointer-memaccess1.C: Likewise.
* g++.dg/torture/Wsizeof-pointer-memaccess2.C: Likewise.
* g++.dg/torture/pr62127.C: Likewise.
* g++.dg/torture/pr67055.C: Likewise.
* g++.dg/torture/stackalign/eh-alloca-1.C: Likewise.
* g++.dg/torture/stackalign/eh-inline-2.C: Likewise.
* g++.dg/torture/stackalign/eh-vararg-1.C: Likewise.
* g++.dg/torture/stackalign/eh-vararg-2.C: Likewise.
* g++.dg/warn/Wplacement-new-size-5.C: Likewise.
* g++.dg/warn/Wsizeof-pointer-memaccess-1.C: Likewise.
* g++.dg/warn/Wvla-1.C: Likewise.
* g++.dg/warn/Wvla-3.C: Likewise.
* g++.old-deja/g++.ext/array2.C: Likewise.
* g++.old-deja/g++.ext/constructor.C: Likewise.
* g++.old-deja/g++.law/builtin1.C: Likewise.
* g++.old-deja/g++.other/crash12.C: Likewise.
* g++.old-deja/g++.other/eh3.C: Likewise.
* g++.old-deja/g++.pt/array6.C: Likewise.
* g++.old-deja/g++.pt/dynarray.C: Likewise.
* gcc.c-torture/compile/20000923-1.c: Likewise.
* gcc.c-torture/compile/20030224-1.c: Likewise.
* gcc.c-torture/compile/20071108-1.c: Likewise.
* gcc.c-torture/compile/20071117-1.c: Likewise.
* gcc.c-torture/compile/900313-1.c: Likewise.
* gcc.c-torture/compile/parms.c: Likewise.
* gcc.c-torture/compile/pr17397.c: Likewise.
* gcc.c-torture/compile/pr35006.c: Likewise.
* gcc.c-torture/compile/pr42956.c: Likewise.
* gcc.c-torture/compile/pr51354.c: Likewise.
* gcc.c-torture/compile/pr52714.c: Likewise.
* gcc.c-torture/compile/pr55851.c: Likewise.
* gcc.c-torture/compile/pr77754-1.c: Likewise.
* gcc.c-torture/compile/pr77754-2.c: Likewise.
* gcc.c-torture/compile/pr77754-3.c: Likewise.
* gcc.c-torture/compile/pr77754-4.c: Likewise.
* gcc.c-torture/compile/pr77754-5.c: Likewise.
* gcc.c-torture/compile/pr77754-6.c: Likewise.
* gcc.c-torture/compile/pr78439.c: Likewise.
* gcc.c-torture/compile/pr79413.c: Likewise.
* gcc.c-torture/compile/pr82564.c: Likewise.
* gcc.c-torture/compile/pr87110.c: Likewise.
* gcc.c-torture/compile/pr99787-1.c: Likewise.
* gcc.c-torture/compile/vla-const-1.c: Likewise.
* gcc.c-torture/compile/vla-const-2.c: Likewise.
* gcc.c-torture/execute/20010209-1.c: Likewise.
* gcc.c-torture/execute/20020314-1.c: Likewise.
* gcc.c-torture/execute/20020412-1.c: Likewise.
* gcc.c-torture/execute/20021113-1.c: Likewise.
* gcc.c-torture/execute/20040223-1.c: Likewise.
* gcc.c-torture/execute/20040308-1.c: Likewise.
* gcc.c-torture/execute/20040811-1.c: Likewise.
* gcc.c-torture/execute/20070824-1.c: Likewise.
* gcc.c-torture/execute/20070919-1.c: Likewise.
* gcc.c-torture/execute/built-in-setjmp.c: Likewise.
* gcc.c-torture/execute/pr22061-1.c: Likewise.
* gcc.c-torture/execute/pr43220.c: Likewise.
* gcc.c-torture/execute/pr82210.c: Likewise.
* gcc.c-torture/execute/pr86528.c: Likewise.
* gcc.c-torture/execute/vla-dealloc-1.c: Likewise.
* gcc.dg/20001012-2.c: Likewise.
* gcc.dg/20020415-1.c: Likewise.
* gcc.dg/20030331-2.c: Likewise.
* gcc.dg/20101010-1.c: Likewise.
* gcc.dg/Walloca-1.c: Likewise.
* gcc.dg/Walloca-10.c: Likewise.
* gcc.dg/Walloca-11.c: Likewise.
* gcc.dg/Walloca-12.c: Likewise.
* gcc.dg/Walloca-13.c: Likewise.
* gcc.dg/Walloca-14.c: Likewise.
* gcc.dg/Walloca-15.c: Likewise.
* gcc.dg/Walloca-2.c: Likewise.
* gcc.dg/Walloca-3.c: Likewise.
* gcc.dg/Walloca-4.c: Likewise.
* gcc.dg/Walloca-5.c: Likewise.
* gcc.dg/Walloca-6.c: Likewise.
* gcc.dg/Walloca-7.c: Likewise.
* gcc.dg/Walloca-8.c: Likewise.
* gcc.dg/Walloca-9.c: Likewise.
* gcc.dg/Walloca-larger-than-2.c: Likewise.
* gcc.dg/Walloca-larger-than-3.c: Likewise.
* gcc.dg/Walloca-larger-than-4.c: Likewise.
* gcc.dg/Walloca-larger-than.c: Likewise.
* gcc.dg/Warray-bounds-22.c: Likewise.
* gcc.dg/Warray-bounds-41.c: Likewise.
* gcc.dg/Warray-bounds-46.c: Likewise.
* gcc.dg/Warray-bounds-48-novec.c: Likewise.
* gcc.dg/Warray-bounds-48.c: Likewise.
* gcc.dg/Warray-bounds-50.c: Likewise.
* gcc.dg/Warray-bounds-63.c: Likewise.
* gcc.dg/Warray-bounds-66.c: Likewise.
* gcc.dg/Wdangling-pointer.c: Likewise.
* gcc.dg/Wfree-nonheap-object-2.c: Likewise.
* gcc.dg/Wfree-nonheap-object.c: Likewise.
* gcc.dg/Wrestrict-17.c: Likewise.
* gcc.dg/Wrestrict.c: Likewise.
* gcc.dg/Wreturn-local-addr-2.c: Likewise.
* gcc.dg/Wreturn-local-addr-3.c: Likewise.
* gcc.dg/Wreturn-local-addr-4.c: Likewise.
* gcc.dg/Wreturn-local-addr-6.c: Likewise.
* gcc.dg/Wsizeof-pointer-memaccess1.c: Likewise.
* gcc.dg/Wstack-usage.c: Likewise.
* gcc.dg/Wstrict-aliasing-bogus-vla-1.c: Likewise.
* gcc.dg/Wstrict-overflow-27.c: Likewise.
* gcc.dg/Wstringop-overflow-15.c: Likewise.
* gcc.dg/Wstringop-overflow-23.c: Likewise.
* gcc.dg/Wstringop-overflow-25.c: Likewise.
* gcc.dg/Wstringop-overflow-27.c: Likewise.
* gcc.dg/Wstringop-overflow-3.c: Likewise.
* gcc.dg/Wstringop-overflow-39.c: Likewise.
* gcc.dg/Wstringop-overflow-56.c: Likewise.
* gcc.dg/Wstringop-overflow-57.c: Likewise.
* gcc.dg/Wstringop-overflow-67.c: Likewise.
* gcc.dg/Wstringop-overflow-71.c: Likewise.
* gcc.dg/Wstringop-truncation-3.c: Likewise.
* gcc.dg/Wvla-larger-than-1.c: Likewise.
* gcc.dg/Wvla-larger-than-2.c: Likewise.
* gcc.dg/Wvla-larger-than-3.c: Likewise.
* gcc.dg/Wvla-larger-than-4.c: Likewise.
* gcc.dg/Wvla-larger-than-5.c: Likewise.
* gcc.dg/analyzer/boxed-malloc-1.c: Likewise.
* gcc.dg/analyzer/call-summaries-2.c: Likewise.
* gcc.dg/analyzer/malloc-1.c: Likewise.
* gcc.dg/analyzer/malloc-reuse.c: Likewise.
* gcc.dg/analyzer/out-of-bounds-diagram-12.c: Likewise.
* gcc.dg/analyzer/pr93355-localealias.c: Likewise.
* gcc.dg/analyzer/putenv-1.c: Likewise.
* gcc.dg/analyzer/taint-alloc-1.c: Likewise.
* gcc.dg/analyzer/torture/pr93373.c: Likewise.
* gcc.dg/analyzer/torture/ubsan-1.c: Likewise.
* gcc.dg/analyzer/vla-1.c: Likewise.
* gcc.dg/atomic/stdatomic-vm.c: Likewise.
* gcc.dg/attr-alloc_size-6.c: Likewise.
* gcc.dg/attr-alloc_size-7.c: Likewise.
* gcc.dg/attr-alloc_size-8.c: Likewise.
* gcc.dg/attr-alloc_size-9.c: Likewise.
* gcc.dg/attr-noipa.c: Likewise.
* gcc.dg/auto-init-uninit-36.c: Likewise.
* gcc.dg/auto-init-uninit-9.c: Likewise.
* gcc.dg/auto-type-1.c: Likewise.
* gcc.dg/builtin-alloc-size.c: Likewise.
* gcc.dg/builtin-dynamic-alloc-size.c: Likewise.
* gcc.dg/builtin-dynamic-object-size-1.c: Likewise.
* gcc.dg/builtin-dynamic-object-size-2.c: Likewise.
* gcc.dg/builtin-dynamic-object-size-3.c: Likewise.
* gcc.dg/builtin-dynamic-object-size-4.c: Likewise.
* gcc.dg/builtin-object-size-1.c: Likewise.
* gcc.dg/builtin-object-size-2.c: Likewise.
* gcc.dg/builtin-object-size-3.c: Likewise.
* gcc.dg/builtin-object-size-4.c: Likewise.
* gcc.dg/builtins-64.c: Likewise.
* gcc.dg/builtins-68.c: Likewise.
* gcc.dg/c23-auto-2.c: Likewise.
* gcc.dg/c99-const-expr-13.c: Likewise.
* gcc.dg/c99-vla-1.c: Likewise.
* gcc.dg/fold-alloca-1.c: Likewise.
* gcc.dg/gomp/pr30494.c: Likewise.
* gcc.dg/gomp/vla-2.c: Likewise.
* gcc.dg/gomp/vla-3.c: Likewise.
* gcc.dg/gomp/vla-4.c: Likewise.
* gcc.dg/gomp/vla-5.c: Likewise.
* gcc.dg/graphite/pr99085.c: Likewise.
* gcc.dg/guality/guality.c: Likewise.
* gcc.dg/lto/pr80778_0.c: Likewise.
* gcc.dg/nested-func-10.c: Likewise.
* gcc.dg/nested-func-12.c: Likewise.
* gcc.dg/nested-func-13.c: Likewise.
* gcc.dg/nested-func-14.c: Likewise.
* gcc.dg/nested-func-15.c: Likewise.
* gcc.dg/nested-func-16.c: Likewise.
* gcc.dg/nested-func-17.c: Likewise.
* gcc.dg/nested-func-9.c: Likewise.
* gcc.dg/packed-vla.c: Likewise.
* gcc.dg/pr100225.c: Likewise.
* gcc.dg/pr25682.c: Likewise.
* gcc.dg/pr27301.c: Likewise.
* gcc.dg/pr31507-1.c: Likewise.
* gcc.dg/pr33238.c: Likewise.
* gcc.dg/pr41470.c: Likewise.
* gcc.dg/pr49120.c: Likewise.
* gcc.dg/pr50764.c: Likewise.
* gcc.dg/pr51491-2.c: Likewise.
* gcc.dg/pr51990-2.c: Likewise.
* gcc.dg/pr51990.c: Likewise.
* gcc.dg/pr59011.c: Likewise.
* gcc.dg/pr59523.c: Likewise.
* gcc.dg/pr61561.c: Likewise.
* gcc.dg/pr78468.c: Likewise.
* gcc.dg/pr78902.c: Likewise.
* gcc.dg/pr79972.c: Likewise.
* gcc.dg/pr82875.c: Likewise.
* gcc.dg/pr83844.c: Likewise.
* gcc.dg/pr84131.c: Likewise.
* gcc.dg/pr87099.c: Likewise.
* gcc.dg/pr87320.c: Likewise.
* gcc.dg/pr89045.c: Likewise.
* gcc.dg/pr91014.c: Likewise.
* gcc.dg/pr93986.c: Likewise.
* gcc.dg/pr98721-1.c: Likewise.
* gcc.dg/pr99122-2.c: Likewise.
* gcc.dg/shrink-wrap-alloca.c: Likewise.
* gcc.dg/sso-14.c: Likewise.
* gcc.dg/strlenopt-62.c: Likewise.
* gcc.dg/strlenopt-83.c: Likewise.
* gcc.dg/strlenopt-84.c: Likewise.
* gcc.dg/strlenopt-91.c: Likewise.
* gcc.dg/torture/Wsizeof-pointer-memaccess1.c: Likewise.
* gcc.dg/torture/calleesave-sse.c: Likewise.
* gcc.dg/torture/pr48953.c: Likewise.
* gcc.dg/torture/pr71881.c: Likewise.
* gcc.dg/torture/pr71901.c: Likewise.
* gcc.dg/torture/pr78742.c: Likewise.
* gcc.dg/torture/pr92088-1.c: Likewise.
* gcc.dg/torture/pr92088-2.c: Likewise.
* gcc.dg/torture/pr93124.c: Likewise.
* gcc.dg/torture/pr94479.c: Likewise.
* gcc.dg/torture/stackalign/alloca-1.c: Likewise.
* gcc.dg/torture/stackalign/inline-2.c: Likewise.
* gcc.dg/torture/stackalign/nested-3.c: Likewise.
* gcc.dg/torture/stackalign/vararg-1.c: Likewise.
* gcc.dg/torture/stackalign/vararg-2.c: Likewise.
* gcc.dg/tree-ssa/20030807-2.c: Likewise.
* gcc.dg/tree-ssa/20080530.c: Likewise.
* gcc.dg/tree-ssa/alias-37.c: Likewise.
* gcc.dg/tree-ssa/builtin-sprintf-warn-22.c: Likewise.
* gcc.dg/tree-ssa/builtin-sprintf-warn-25.c: Likewise.
* gcc.dg/tree-ssa/builtin-sprintf-warn-3.c: Likewise.
* gcc.dg/tree-ssa/loop-interchange-15.c: Likewise.
* gcc.dg/tree-ssa/pr23848-1.c: Likewise.
* gcc.dg/tree-ssa/pr23848-2.c: Likewise.
* gcc.dg/tree-ssa/pr23848-3.c: Likewise.
* gcc.dg/tree-ssa/pr23848-4.c: Likewise.
* gcc.dg/uninit-32.c: Likewise.
* gcc.dg/uninit-36.c: Likewise.
* gcc.dg/uninit-39.c: Likewise.
* gcc.dg/uninit-41.c: Likewise.
* gcc.dg/uninit-9-O0.c: Likewise.
* gcc.dg/uninit-9.c: Likewise.
* gcc.dg/uninit-pr100250.c: Likewise.
* gcc.dg/uninit-pr101300.c: Likewise.
* gcc.dg/uninit-pr101494.c: Likewise.
* gcc.dg/uninit-pr98583.c: Likewise.
* gcc.dg/vla-2.c: Likewise.
* gcc.dg/vla-22.c: Likewise.
* gcc.dg/vla-24.c: Likewise.
* gcc.dg/vla-3.c: Likewise.
* gcc.dg/vla-4.c: Likewise.
* gcc.dg/vla-stexp-1.c: Likewise.
* gcc.dg/vla-stexp-2.c: Likewise.
* gcc.dg/vla-stexp-4.c: Likewise.
* gcc.dg/vla-stexp-5.c: Likewise.
* gcc.dg/winline-7.c: Likewise.
* gcc.target/aarch64/stack-check-alloca-1.c: Likewise.
* gcc.target/aarch64/stack-check-alloca-10.c: Likewise.
* gcc.target/aarch64/stack-check-alloca-2.c: Likewise.
* gcc.target/aarch64/stack-check-alloca-3.c: Likewise.
* gcc.target/aarch64/stack-check-alloca-4.c: Likewise.
* gcc.target/aarch64/stack-check-alloca-5.c: Likewise.
* gcc.target/aarch64/stack-check-alloca-6.c: Likewise.
* gcc.target/aarch64/stack-check-alloca-7.c: Likewise.
* gcc.target/aarch64/stack-check-alloca-8.c: Likewise.
* gcc.target/aarch64/stack-check-alloca-9.c: Likewise.
* gcc.target/arc/interrupt-6.c: Likewise.
* gcc.target/i386/pr80969-3.c: Likewise.
* gcc.target/loongarch/stack-check-alloca-1.c: Likewise.
* gcc.target/loongarch/stack-check-alloca-2.c: Likewise.
* gcc.target/loongarch/stack-check-alloca-3.c: Likewise.
* gcc.target/loongarch/stack-check-alloca-4.c: Likewise.
* gcc.target/loongarch/stack-check-alloca-5.c: Likewise.
* gcc.target/loongarch/stack-check-alloca-6.c: Likewise.
* gcc.target/riscv/stack-check-alloca-1.c: Likewise.
* gcc.target/riscv/stack-check-alloca-10.c: Likewise.
* gcc.target/riscv/stack-check-alloca-2.c: Likewise.
* gcc.target/riscv/stack-check-alloca-3.c: Likewise.
* gcc.target/riscv/stack-check-alloca-4.c: Likewise.
* gcc.target/riscv/stack-check-alloca-5.c: Likewise.
* gcc.target/riscv/stack-check-alloca-6.c: Likewise.
* gcc.target/riscv/stack-check-alloca-7.c: Likewise.
* gcc.target/riscv/stack-check-alloca-8.c: Likewise.
* gcc.target/riscv/stack-check-alloca-9.c: Likewise.
* gcc.target/sparc/setjmp-1.c: Likewise.
* gcc.target/x86_64/abi/ms-sysv/ms-sysv.c: Likewise.
* gcc.c-torture/compile/20001221-1.c: Don't 'dg-skip-if'
for '! alloca'.
* gcc.c-torture/compile/20020807-1.c: Likewise.
* gcc.c-torture/compile/20050801-2.c: Likewise.
* gcc.c-torture/compile/920428-4.c: Likewise.
* gcc.c-torture/compile/debugvlafunction-1.c: Likewise.
* gcc.c-torture/compile/pr41469.c: Likewise.
* gcc.c-torture/execute/920721-2.c: Likewise.
* gcc.c-torture/execute/920929-1.c: Likewise.
* gcc.c-torture/execute/921017-1.c: Likewise.
* gcc.c-torture/execute/941202-1.c: Likewise.
* gcc.c-torture/execute/align-nest.c: Likewise.
* gcc.c-torture/execute/alloca-1.c: Likewise.
* gcc.c-torture/execute/pr22061-4.c: Likewise.
* gcc.c-torture/execute/pr36321.c: Likewise.
* gcc.dg/torture/pr8081.c: Likewise.
* gcc.dg/analyzer/data-model-1.c: Don't
'dg-require-effective-target alloca'.  XFAIL relevant
'dg-warning's for '! alloca'.
* gcc.dg/uninit-38.c: Likewise.
* gcc.dg/uninit-pr98578.c: Likewise.
* gcc.dg/compat/struct-by-value-22_main.c: Comment on
'dg-require-effective-target alloca'.
libstdc++-v3/
* testsuite/lib/prune.exp (proc libstdc++-dg-prune): Turn
'sorry, unimplemented: dynamic stack allocation not supported' into
UNSUPPORTED.

Gracefully handle the case that 'gcc/testsuite/lib/gcc-dg.exp:find-dg-do-what' has not been called (indirectly) from 'dg-test'

No change in behavior intended.

gcc/testsuite/
* lib/gcc-dg.exp (find-dg-do-what): Gracefully handle the case
that we've not be called (indirectly) from 'dg-test'.
* lib/target-supports.exp (check_effective_target_stack_size)
(check_effective_target_alloca): Catch this.

Refactor duplicated code into 'gcc/testsuite/lib/gcc-dg.exp:find-dg-do-what'

No change in behavior intended.

gcc/testsuite/
* lib/gcc-dg.exp (proc find-dg-do-what): New.
* lib/target-supports.exp (check_effective_target_stack_size)
(check_effective_target_alloca): Use it.

BPF, nvptx: Standardize on 'sorry, unimplemented: dynamic stack allocation not supported'

... instead of BPF: 'error: BPF does not support dynamic stack allocation', and
nvptx: 'sorry, unimplemented: target cannot support alloca'.

gcc/
* config/bpf/bpf.md (define_expand "allocate_stack"): Emit
'sorry, unimplemented: dynamic stack allocation not supported'.
* config/nvptx/nvptx.md (define_expand "allocate_stack")
[!TARGET_SOFT_STACK && !(TARGET_PTX_7_3 && TARGET_SM52)]: Likewise.
gcc/testsuite/
* gcc.target/bpf/diag-alloca-1.c: Adjust 'dg-message'.
* gcc.target/bpf/diag-alloca-2.c: Likewise.
* gcc.target/nvptx/alloca-1-sm_30.c: Likewise.
* gcc.target/nvptx/vla-1-sm_30.c: Likewise.
* lib/target-supports.exp (proc check_effective_target_alloca):
Adjust comment.

libgomp: Add '__attribute__((unused))' to variables used only in 'assert(...)'

Without this attribute, the building process will fail if GCC is configured
with 'CFLAGS=-DNDEBUG'.

libgomp/ChangeLog:

* oacc-mem.c (acc_unmap_data, goacc_exit_datum_1, find_group_last,
goacc_enter_data_internal): Add '__attribute__((unused))'.
* target.c (gomp_unmap_vars_internal): Likewise.

libstdc++: Remove misleading comment in __atomic_base<Int>

No conversion is needed because the type of _M_i is __int_type anyway.

libstdc++-v3/ChangeLog:

* include/bits/atomic_base.h (__atomic_base<_ITp>): Remove
misleading comment.

libstdc++: Remove redundant cast in floating_from_chars.cc

In r15-7647-g32457bc25fea80 I added a cast and also changed the type of
the variable, making the cast redundant. This removes the cast.

libstdc++-v3/ChangeLog:

* src/c++17/floating_from_chars.cc (__floating_from_chars_hex):
Remove redundant cast.

OpenMP: Silence uninitialized variable warning in C++ front end.

There's no actual problem with the code here, just a false-positive
warning emitted by some older GCC versions.

gcc/cp/ChangeLog
* parser.cc (cp_finish_omp_declare_variant): Initialize
append_args_last.

PR modula2/118978 ICE when attempting to pass an incompatible parameter

This bugfix is for a an ICE which occurs if an incompatible parameter
is passed to a procedure.  In particular if a REAL constant actual
parameter is passed to INTEGER formal parameter then M2Range is invoked
to check the type and then M2Range is called to check the value range.

The value range check causes an ICE.  The bug fix introduces range
dependencies on type checks.  If the type check fails an
error message is generated and any future range check cancelled.
These range and type checks are tightly coupled when generating
parameter quad intermediate code.

gcc/m2/ChangeLog:

PR modula2/118978
* gm2-compiler/M2Check.mod (checkConstMeta): Add check for
typed constants.
* gm2-compiler/M2Quads.mod (BoolFrame): New field RangeDep.
(CheckProcedureParameters): Call PutRangeDep to associate the
range dependency with the parameter on the quad stack.
Pass ParamCheckId to CheckParameter.
(CheckProcTypeAndProcedure): Add ParamCheckId parameter.
Pass ParamCheckId to BuildRange.
(CheckParameter): New parameter ParamCheckId.
Pass ParamCheckId to CheckProcTypeAndProcedure.
(CheckParameterOrdinals): Add extra range dep parameter to the
call of InitParameterRangeCheck.
(ConvertBooleanToVariable): Initialize RangeDep field.
(PushBacktok): Ditto.
(OperandRangeDep): New procedure.
(PutRangeDep): Ditto.
* gm2-compiler/M2Range.def (InitTypesParameterCheck): Add new
parameter depRangeId.
(InitParameterRangeCheck): Add new parameter parentRangeId.
(FoldRangeCheck): Add new parameter range.
* gm2-compiler/M2Range.mod (InitTypesParameterCheck): Add new
parameter depRangeId.
(InitParameterRangeCheck): Add new parameter parentRangeId.
(FoldRangeCheck): Add new parameter range and rewrite.
(FoldRangeCheckLower): New procedure.
(Range): New field cancelled.
New field dependantid.
(PutRangeParam): Initialize dependantid.
(PutRangeParamAssign): Ditto.
(CheckCancelled): New procedure.
(Cancel): Ditto.
(IsCancelled): New procedure function.
(FoldTypeParam): Add depRangeId parameter.
(WriteRangeCheck): Add dependent debugging.

gcc/testsuite/ChangeLog:

PR modula2/118978
* gm2/pim/fail/badparamtype.mod: New test.

Signed-off-by: Gaius Mulley <gaiusmod2@gmail.com>

Daily bump.

Append a newline in debug_edge

Append a newline in debug_edge so that we get

(gdb) call debug_edge (e)
edge (bb_9, bb_1)
(gdb)

instead of

(gdb) call debug_edge (e)
edge (bb_9, bb_1)(gdb)

* sese.cc (debug_edge): Append a newline.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>

tree-optimization/118954 - avoid UB on ref created by predcom

When predicitive commoning moves an invariant ref it makes sure to
not build a MEM_REF with a base that is negatively offsetted from
an object.  But in trying to preserve some transforms it does not
consider association of a constant offset with the address computation
in DR_BASE_ADDRESS leading to exactly this problem again.  This is
arguably a problem in data-ref analysis producing such an out-of-bound
DR_BASE_ADDRESS, but this looks quite involved to fix, so the
following avoids the association in one more case.  This fixes the
testcase while preserving the desired transform in
gcc.dg/tree-ssa/predcom-1.c.

PR tree-optimization/118954
* tree-predcom.cc (ref_at_iteration): Make sure to not
associate the constant offset with DR_BASE_ADDRESS when
that is an offsetted pointer.

* gcc.dg/torture/pr118954.c: New testcase.

Improve g++.dg/torture/pr118521.C

Alexander pointed out the way to do a dg-bogus in an included header.

PR tree-optimization/118521
* g++.dg/torture/pr118521.C: Use dg-bogus properly.

Fortran: initialize non-saved pointers with -fcheck=pointer [PR48958]

PR fortran/48958

gcc/fortran/ChangeLog:

* trans-array.cc (gfc_trans_deferred_array): Initialize the data
component of non-saved pointers when -fcheck=pointer is set.

gcc/testsuite/ChangeLog:

* gfortran.dg/pointer_init_13.f90: New test.

Fortran: Fix build on solaris [PR107635]

libgfortran/ChangeLog:

PR fortran/107635
* caf/single.c: Replace alloca with __builtin_alloca.

Fortran: Improve gfc_array_kind for assumed rank; gfc_tree_array_size on 'tree'

Improve the internal and debug representation of assumed-rank arrays by
honoring the pointer and allocatable property.

Permit obtaining the array size from only a tree (via the array descriptor)
besides obtaining it from the gfc_expr's array spec. This will be used
by a follow up OpenMP patch for mapping derived types with allocatable
components.

gcc/fortran/ChangeLog:

* trans-array.cc (gfc_full_array_size): Obtain the rank from
the array descriptor for assumed rank.
(gfc_tree_array_size): Likewise; permit expr = NULL to operate
only the tree.
(gfc_conv_descriptor_stride_get): Update for added assumed-rank
array types.
* trans-openmp.cc (gfc_omp_finish_clause): Likewise.
* trans-types.cc (gfc_build_array_type, gfc_get_derived_type,
gfc_get_array_descr_info): Likewise.
* trans.h (enum gfc_array_kind): Add
GFC_ARRAY_ASSUMED_RANK_{ALLOCATABLE,POINTER{,_CONT}}.

Daily bump.

diagnostics: add comments about global_dc

No functional change intended.

gcc/ChangeLog:
* diagnostic-core.h: Add comments making clear that these
functions implicitly use global_dc.

Signed-off-by: David Malcolm <dmalcolm@redhat.com>

sarif-replay: add testcase for empty input file

gcc/testsuite/ChangeLog:
* sarif-replay.dg/malformed-json/empty.sarif: New test.

Signed-off-by: David Malcolm <dmalcolm@redhat.com>

sarif-replay: improve error for unescaped braces in messages (§3.11.5)

Spotted via https://github.com/llvm/llvm-project/issues/128024

gcc/ChangeLog:
* libsarifreplay.cc
(sarif_replayer::make_plain_text_within_result_message): Capture
which json::string was used.  When reporting on unescaped "{" or
"}" in SARIF message strings, use that string rather than the
message object, and refer the user to §3.11.5 ("Messages with
placeholders") rather than §3.11.11 ("arguments").  Ideally we'd
place the error at the precise character, but that can't be done
without reworking json-parsing.cc's lexer::lex_string, which is
too invasive for stage 4.
(sarif_replayer::get_plain_text_from_mfms): Capture which
json::string was used.
(sarif_replayer::lookup_plain_text_within_result_message):
Likewise.

gcc/testsuite/ChangeLog:
* sarif-replay.dg/2.1.0-invalid/3.11.11-malformed-placeholder.sarif:
Rename to...
* sarif-replay.dg/2.1.0-invalid/3.11.5-unescaped-braces.sarif:
...this.  Update expected subsection in error message, and
expected underline in quoted JSON.

Signed-off-by: David Malcolm <dmalcolm@redhat.com>

doc: Drop note for Binutils pre 2.24

Binutils 2.24 was released in 2013, so this is more than 11 years old.

gcc:
PR target/69374
* doc/install.texi (Specific, aarch64*-*-*): Drop note for
Binutils pre 2.24.

aarch64: Remove old aarch64_expand_sve_vec_cmp_float code

While looking at PR118956, I noticed that we had some dead code
left over after the removal of the vcond patterns.  The can_invert_p
path is no longer used.

gcc/
* config/aarch64/aarch64-protos.h (aarch64_expand_sve_vec_cmp_float):
Remove can_invert_p argument and change return type to void.
* config/aarch64/aarch64.cc (aarch64_expand_sve_vec_cmp_float):
Likewise.
* config/aarch64/aarch64-sve.md (vec_cmp<mode><vpred>): Update call
accordingly.

testsuite: Fix sve/pcs/args_1.c failures [PR116604]

This test has been failing since r15-1619-g3b9b8d6cfdf593, which made
IRA prefer a call-clobbered register over a call-preserved register
for mem1 (the second load).  In this particular case, that just
forces the variable p3 to be allocated to a call-preserved register
instead, leading to an extra predicate move from p3 to that register.

However, it was really pot luck that this worked before.  Each argument
is used exactly once, so there isn't an obvious colouring order.
And mem0 and mem1 are passed by indirect reference, so they are not
REG_EQUIV to a stack slot in the way that some memory arguments are.

IIRC, the test was the result of some experimentation, and so I think
the best fix is to rework it to try to make it less sensitive to RA
decisions.  This patch does that by enabling scheduling for the
function and using both memory arguments in the same instruction.
This gets rid of the distracting prologue and epilogue code and
restricts the test to the PCS parts.

gcc/testsuite/
PR testsuite/116604
* gcc.target/aarch64/sve/pcs/args_1.c (callee_pred): Enable scheduling
and use both memory arguments in the same instruction.  Expect no
prologue and epilogue code.

testsuite: Fix sve/var_stride_*.c failures

gcc.target/aarch64/sve/var_stride_2.c started failing after
r15-268-g9dbff9c05520, but the change was an improvement:

@@ -36,13 +36,11 @@
  b.any .L9
  ret
 .L17:
- ubfiz x5, x3, 10, 16
- ubfiz x4, x2, 10, 16
- add x5, x1, x5
- add x4, x0, x4
- cmp x0, x5
- ccmp x1, x4, 2, ls
  uxtw x4, w2
+ add x6, x1, x3, lsl 10
+ cmp x0, x6
+ add x5, x0, x4, lsl 10
+ ccmp x1, x5, 2, ls
  ccmp w2, 0, 4, hi
  beq .L3
  cntb x7

This patch therefore changes the test to expect the new output
for var_stride_2.c.

The changes for var_stride_4.c were a wash, with both versions
having 18(!) arithmetic instructions before the alias check branch.
Both versions sign-extend the n and m arguments as part of this
sequence; the question is whether they do it first or later.

This patch therefore changes the test to accept either the old
or the new code for var_stride_4.c.

gcc/testsuite/
* gcc.target/aarch64/sve/var_stride_2.c: Expect ADD+LSL.
* gcc.target/aarch64/sve/var_stride_4.c: Accept LSL or SBFIZ.

tree-optimization/118521 - bogus diagnostic from unreachable code

When SCCP does final value replacement we end up with unfolded IL like

__result_274 = _150 + 1;
...
__new_finish_106 = __result_274 + 3;  <-- from SCCP
_115 = _150 + 4;
if (__new_finish_106 != _115)

this does only get rectified by the next full folding which happens
in forwprop4 which is after the strlen pass emitting the unwanted
diagnostic.  The following mitigates this case in a similar way as
r15-7472 did for PR118817 - by ensuring we have the IL folded.
This is done by simply folding all immediate uses of the former
PHI def that SCCP replaces.  All other more general approaches have
too much fallout at this point.

PR tree-optimization/118521
* tree-scalar-evolution.cc (final_value_replacement_loop):
Fold uses of the replaced PHI def.

* g++.dg/torture/pr118521.C: New testcase.