Harald Anlauf [Sat, 11 Mar 2023 14:37:37 +0000 (15:37 +0100)]
Fortran: fix bounds check for copying of class expressions [PR106945]
In the bounds check for copying of class expressions, the number of elements
determined from a descriptor, returned as type gfc_array_index_type (i.e. a
signed type), should be converted to the type of the passed element count,
which is of type size_type_node (i.e. unsigned), for use in comparisons.
gcc/fortran/ChangeLog:
PR fortran/106945
* trans-expr.c (gfc_copy_class_to_class): Convert element counts in
bounds check to common type for comparison.
gcc/testsuite/ChangeLog:
PR fortran/106945
* gfortran.dg/pr106945.f90: New test.
Jonathan Wakely [Thu, 2 Feb 2023 14:06:40 +0000 (14:06 +0000)]
libstdc++: Fix std::filesystem errors with -fkeep-inline-functions [PR108636]
With -fkeep-inline-functions there are linker errors when including
<filesystem>. This happens because there are some filesystem::path
constructors defined inline which call non-exported functions defined in
the library. That's usually not a problem, because those constructors
are only called by code that's also inside the library. But when the
header is compiled with -fkeep-inline-functions those inline functions
are emitted even though they aren't called. That then creates an
undefined reference to the other library internals. The fix is to just
move the private constructors into the library where they are called.
That way they are never even seen by users, and so not compiled even if
-fkeep-inline-functions is used.
Harald Anlauf [Mon, 20 Feb 2023 20:28:09 +0000 (21:28 +0100)]
Fortran: improve checking of character length specification [PR96025]
gcc/fortran/ChangeLog:
PR fortran/96025
* parse.c (check_function_result_typed): Improve type check of
specification expression for character length and return status.
(parse_spec): Use status from above.
* resolve.c (resolve_fntype): Prevent use of invalid specification
expression for character length.
gcc/testsuite/ChangeLog:
PR fortran/96025
* gfortran.dg/pr96025.f90: New test.
This is a follow-up to commit a4c6bd0821099f6b8c0f64a96ffd9d01a025c413
introducing a runtime check for alignment for 16 byte atomic
compare-exchange, load, and store.
libatomic/ChangeLog:
* config/s390/cas_n.c: New file.
* config/s390/load_n.c: New file.
* config/s390/store_n.c: New file.
Alex Coplan [Mon, 6 Feb 2023 14:32:21 +0000 (14:32 +0000)]
aarch64: Fix up bfmlal lane pattern [PR104921]
As the testcase shows, this pattern had an incorrect constraint leading
to GCC's output getting rejected by the assembler.
This patch fixes the constraint accordingly.
The test is split into two: one that can run without bf16 support from
the assembler and another that checks that the output actually assembles
when such support is available.
gcc/ChangeLog:
PR target/104921
* config/aarch64/aarch64-simd.md (aarch64_bfmlal<bt>_lane<q>v4sf):
Use correct constraint for operand 3.
gcc/testsuite/ChangeLog:
PR target/104921
* gcc.target/aarch64/pr104921-1.c: New test.
* gcc.target/aarch64/pr104921-2.c: New test.
* gcc.target/aarch64/pr104921.x: Include file for new tests.
Nelson Chu [Mon, 29 Nov 2021 12:48:20 +0000 (04:48 -0800)]
RISC-V: jal cannot refer to a default visibility symbol for shared object. [PR 108339]
This is the original binutils bugzilla report,
https://sourceware.org/bugzilla/show_bug.cgi?id=28509
And this is the first version of the proposed binutils patch,
https://sourceware.org/pipermail/binutils/2021-November/118398.html
After applying the binutils patch, I get the the unexpected error when
building libgcc,
/scratch/nelsonc/riscv-gnu-toolchain/riscv-gcc/libgcc/config/riscv/div.S:42:
/scratch/nelsonc/build-upstream/rv64gc-linux/build-install/riscv64-unknown-linux-gnu/bin/ld: relocation R_RISCV_JAL against `__udivdi3' which may bind externally can not be used when making a shared object; recompile with -fPIC
Therefore, this patch add an extra hidden alias symbol for __udivdi3, and
then use HIDDEN_JUMPTARGET to target a non-preemptible symbol instead.
The solution is similar to glibc as follows,
https://sourceware.org/git/?p=glibc.git;a=commit;h=68389203832ab39dd0dbaabbc4059e7fff51c29b
libgcc/ChangeLog:
PR target/108339
* config/riscv/div.S: Add the hidden alias symbol for __udivdi3, and
then use HIDDEN_JUMPTARGET to target it since it is non-preemptible.
* config/riscv/riscv-asm.h: Added new macros HIDDEN_JUMPTARGET and
HIDDEN_DEF.
Kewen Lin [Wed, 18 Jan 2023 08:34:19 +0000 (02:34 -0600)]
rs6000: Teach rs6000_opaque_type_invalid_use_p about gcall [PR108348]
PR108348 shows one special case that MMA opaque types are
used in function arguments and treated as pass by reference,
it results in one copying from argument to a temp variable,
since this copying happens before rs6000_function_arg check,
it can cause ICE without MMA support then. This patch is to
teach function rs6000_opaque_type_invalid_use_p to check if
any function argument in a gcall stmt has the invalid use of
MMA opaque types.
btw, I checked the handling on return value, it doesn't have
this kind of issue as its checking and error emission is quite
early, so this doesn't handle function return value.
PR target/108348
gcc/ChangeLog:
* config/rs6000/rs6000.c (rs6000_opaque_type_invalid_use_p): Add the
support for invalid uses of MMA opaque type in function arguments.
gcc/testsuite/ChangeLog:
* gcc.target/powerpc/pr108348-1.c: New test.
* gcc.target/powerpc/pr108348-2.c: New test.
Kewen Lin [Sun, 12 Feb 2023 15:35:27 +0000 (09:35 -0600)]
rs6000: Teach rs6000_opaque_type_invalid_use_p about inline asm [PR108272]
As PR108272 shows, there are some invalid uses of MMA opaque
types in inline asm statements. This patch is to teach the
function rs6000_opaque_type_invalid_use_p for inline asm,
check and error any invalid use of MMA opaque types in input
and output operands.
PR target/108272
gcc/ChangeLog:
* config/rs6000/rs6000.c (rs6000_opaque_type_invalid_use_p): Add the
support for invalid uses in inline asm, factor out the checking and
erroring to lambda function check_and_error_invalid_use.
gcc/testsuite/ChangeLog:
* gcc.target/powerpc/pr108272-1.c: New test.
* gcc.target/powerpc/pr108272-2.c: New test.
* gcc.target/powerpc/pr108272-3.c: New test.
* gcc.target/powerpc/pr108272-4.c: New test.
Harald Anlauf [Wed, 1 Feb 2023 20:01:32 +0000 (21:01 +0100)]
Fortran: error recovery on invalid array section [PR108609]
The testcase for PR108527 uncovered a latent issue with invalid array
sections that resulted in different paths being taken on different
architectures. Detect the invalid array declaration for a clean recovery.
gcc/fortran/ChangeLog:
PR fortran/108609
* expr.c (find_array_section): Add check to prevent interpreting an
mpz non-integer constant as an integer.
gcc/testsuite/ChangeLog:
PR fortran/108609
* gfortran.dg/pr108527.f90: Adjust test pattern.
Harald Anlauf [Tue, 24 Jan 2023 21:36:25 +0000 (22:36 +0100)]
Fortran: fix ICE in compare_bound_int [PR108527]
gcc/fortran/ChangeLog:
PR fortran/108527
* resolve.c (compare_bound_int): Expression to compare must be of
type INTEGER.
(compare_bound_mpz_t): Likewise.
(check_dimension): Fix comment on checks applied to array section
and clean up associated logic.
gcc/testsuite/ChangeLog:
PR fortran/108527
* gfortran.dg/pr108527.f90: New test.
Richard Biener [Fri, 2 Sep 2022 11:36:13 +0000 (13:36 +0200)]
tree-optimization/106809 - compile time hog in VN
The dominated_by_p_w_unex function is prone to high compile time.
With GCC 12 we introduced a VN run for uninit diagnostics which now
runs into a degenerate case with bison generated code. Fortunately
this case is easy to fix with a simple extra check - a more
general fix needs more work.
PR tree-optimization/106809
* tree-ssa-sccvn.c (dominaged_by_p_w_unex): Check we have
more than one successor before doing extra work.
Harald Anlauf [Mon, 23 Jan 2023 20:19:03 +0000 (21:19 +0100)]
Fortran: avoid ICE on invalid array subscript triplets [PR108501]
gcc/fortran/ChangeLog:
PR fortran/108501
* interface.c (get_expr_storage_size): Check array subscript triplets
that we actually have integer values before trying to extract with
mpz_get_si.
gcc/testsuite/ChangeLog:
PR fortran/108501
* gfortran.dg/pr108501.f90: New test.
Alex Coplan [Thu, 1 Dec 2022 17:36:02 +0000 (17:36 +0000)]
varasm: Fix type confusion bug
This patch fixes a type confusion bug in varasm.c:assemble_variable.
The problem is that the current code calls:
sect = get_variable_section (decl, false);
and then accesses sect->named.name without checking whether the section
is in fact a named section. In the surrounding else clause, we only know
that SECTION_STYLE (sect) != SECTION_NOSWITCH, so it is possible that
the section is an unnamed section.
In practice, this means that we end up doing a wild string compare
between a function pointer and the string literal ".vtable_map_vars".
This is because sect->named.name aliases sect->unnamed.callback in the
section union.
This can be seen in GDB with a simple testcase such as "int x;".
This patch fixes the issue by checking the SECTION_STYLE of the section
is in fact SECTION_NAMED before trying to do the string comparison.
We drop the existing check of whether sect->named.name is non-NULL
because this should presumably always be the case for a named section.
gcc/ChangeLog:
* varasm.c (assemble_variable): Fix type confusion bug when
checking for ".vtable_map_vars" section.
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