Usually we handle DR1558 substitution near the top of tsubst, but in this
case while substituting TYPENAME_TYPE we were passing an alias
specialization to tsubst_aggr_type, which ignored its aliasness.
PR c++/103057
gcc/cp/ChangeLog:
* pt.cc (tsubst_aggr_type): Call tsubst for alias template
specialization.
gcc/testsuite/ChangeLog:
* g++.dg/cpp0x/alias-decl-void1.C: New test.
With -fno-exceptions we get a -Wmisleading-indentation warning for:
if (cond)
__try {}
__catch (...) {}
This is because the __catch(...) expands to if (false), but is indented
as though it is controlled by the preceding 'if'. Surround it in braces.
The new make_shared<T[]> code triggers a bogus warning due to PR 61596,
which can be disabled with a pragma.
libstdc++-v3/ChangeLog:
PR libstdc++/104019
* include/bits/istream.tcc (basic_istream::sentry): Add braces
around try-block.
* include/bits/shared_ptr_base.h (_Sp_counted_array_base::_M_init):
Add pragmas to disable bogus warnings from PR 61596.
For GNU/Linux G++ defines _GNU_SOURCE automatically, but not for Cygwin.
This means secure_getenv is not declared by Cygwin's <stdlib.h>, even
though autoconf detected it is present in the library. Define it in the
source files that want to use secure_getenv.
libstdc++-v3/ChangeLog:
PR libstdc++/104217
* src/c++17/fs_ops.cc (_GNU_SOURCE): Define.
* src/filesystem/dir.cc (_GNU_SOURCE): Define.
* src/filesystem/ops.cc (_GNU_SOURCE): Define.
This adds a new internal flag to the filesystem::directory_iterator
constructor that makes it fail if the path is a symlink that resolves to
a directory. This prevents filesystem::remove_all from following a
symlink to a directory, rather than deleting the symlink itself.
We can also use that new flag in recursive_directory_iterator to ensure
that we don't follow symlinks if the follow_directory_symlink option is
not set.
This also moves an error check in filesystem::remove_all after the while
loop, so that errors from the directory_iterator constructor are
reproted, instead of continuing to the filesystem::remove call below.
libstdc++-v3/ChangeLog:
PR libstdc++/104161
* acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for
fdopendir.
* config.h.in: Regenerate.
* configure: Regenerate.
* src/c++17/fs_dir.cc (_Dir): Add nofollow flag to constructor
and pass it to base class constructor.
(directory_iterator): Pass nofollow flag to _Dir constructor.
(fs::recursive_directory_iterator::increment): Likewise.
* src/c++17/fs_ops.cc (do_remove_all): Use nofollow option for
directory_iterator constructor. Move error check outside loop.
* src/filesystem/dir-common.h (_Dir_base): Add nofollow flag to
constructor and when it's set use ::open with O_NOFOLLOW and
O_DIRECTORY.
* src/filesystem/dir.cc (_Dir): Add nofollow flag to constructor
and pass it to base class constructor.
(directory_iterator): Pass nofollow flag to _Dir constructor.
(fs::recursive_directory_iterator::increment): Likewise.
* src/filesystem/ops.cc (remove_all): Use nofollow option for
directory_iterator constructor. Move error check outside loop.
gcc/fortran/ChangeLog:
PR fortran/104227
* check.cc (gfc_calculate_transfer_sizes): Fix checking of arrays
passed as MOLD argument to the TRANSFER intrinsic for having
storage size zero.
gcc/testsuite/ChangeLog:
PR fortran/104227
* gfortran.dg/transfer_check_6.f90: New test.
Here when attempting to use B's implicitly deleted default constructor,
mark_used rightfully returns false, but for the wrong reason: it
tries to instantiate the synthesized noexcept specifier which then only
silently fails because get_defaulted_eh_spec suppresses diagnostics
for deleted functions. This lack of diagnostics causes us to crash on
the first testcase below (thanks to the assert in finish_expr_stmt), and
silently accept the second testcase.
To fix this, this patch makes mark_used avoid attempting to instantiate
the noexcept specifier of a deleted function, so that we'll instead
directly reject (and diagnose) the function due to its deletedness.
PR c++/101532
PR c++/104225
gcc/cp/ChangeLog:
* decl2.cc (mark_used): Don't consider maybe_instantiate_noexcept
on a deleted function.
gcc/testsuite/ChangeLog:
* g++.dg/cpp0x/nsdmi-template21.C: New test.
* g++.dg/cpp0x/nsdmi-template21a.C: New test.
Given build_this of a TARGET_EXPR, cp_build_fold_indirect_ref returns the
TARGET_EXPR. But that's the wrong value category for the result of the
defaulted class assignment operator, which returns an lvalue, so we need to
actually build the INDIRECT_REF.
PR c++/59950
gcc/cp/ChangeLog:
* call.cc (build_over_call): Use cp_build_indirect_ref.
gcc/testsuite/ChangeLog:
* g++.dg/init/assign2.C: New test.
This reverts commit db1a65d936.
On 2021-09-17T01:01:39-0700, Andrew Pinski via Gcc-patches <gcc-patches@gcc.gnu.org> wrote:
> On Fri, Sep 17, 2021 at 12:46 AM Thomas Schwinge <thomas@codesourcery.com> wrote:
>> On 2021-09-15T13:56:37-0700, apinski--- via Gcc-patches <gcc-patches@gcc.gnu.org> wrote:
>> > The error message is obvious -funconfigured-libstdc++-v3 is used
>> > on the g++ command line. So we just add the dependancy.
>>
>> > --- a/Makefile.def
>> > +++ b/Makefile.def
>> > @@ -592,6 +592,7 @@ dependencies = { module=configure-target-fastjar; on=configure-target-zlib; };
>> > dependencies = { module=all-target-fastjar; on=all-target-zlib; };
>> > dependencies = { module=configure-target-libgo; on=configure-target-libffi; };
>> > dependencies = { module=configure-target-libgo; on=all-target-libstdc++-v3; };
>> > +dependencies = { module=configure-target-libffi; on=all-target-libstdc++-v3; };
>> > dependencies = { module=all-target-libgo; on=all-target-libbacktrace; };
>> > dependencies = { module=all-target-libgo; on=all-target-libffi; };
>> > dependencies = { module=all-target-libgo; on=all-target-libatomic; };
>>
>> I'm confused, because given that this 'Makefile.def' change only has the
>> following effect:
>>
>> > --- a/Makefile.in
>> > +++ b/Makefile.in
>> > @@ -61261,6 +61261,7 @@ all-bison: maybe-all-intl
>> > all-flex: maybe-all-intl
>> > all-m4: maybe-all-intl
>> > configure-target-libgo: maybe-all-target-libstdc++-v3
>> > +configure-target-libffi: maybe-all-target-libstdc++-v3
>> > configure-target-liboffloadmic: maybe-configure-target-libgomp
>> > all-target-liboffloadmic: maybe-all-target-libgomp
>> > configure-target-newlib: maybe-all-binutils
>>
>> ... isn't that actually a no-op, because we already had such a dependency
>> listed? Now twice:
>>
>> $ grep -n -F 'configure-target-libffi: maybe-all-target-libstdc++-v3' -- Makefile.in
>> 61264:configure-target-libffi: maybe-all-target-libstdc++-v3
>> 61372:configure-target-libffi: maybe-all-target-libstdc++-v3
>>
>> Compared to the existing one, the one you've added is additionally
>> restricted by '@unless gcc-bootstrap'.
>>
>> I noticed this as I remembered that on our og[...] development branches
>> we have a patch in the opposite direction: get rid of this dependency via
>> removing 'lang_env_dependencies = { module=libffi; cxx=true; };' from
>> 'Makefile.def'. See
>> <http://mid.mail-archive.com/alpine.DEB.2.21.9999.1812201344250.99920@build7-trusty-cs.sje.mentorg.com>
>> "Disable libstdc++ dependency for libffi". (Maciej CCed in case you have
>> any further thoughts on that.)
>
> Oh, I see what happened now, the old bug was actually fixed by r6-5415
> which added cxx=true.
> So yes my patch is actually not needed and can be reverted.
> I tried to look to see if there was a dependency was there but for
> some reason I did not see it.
A recent patch added tests for OPTION_GLIBC that is defined in
linux.h and linux64.h. This broke bootstrap for non-Linux rs6000
configurations. This patch defines OPTION_GLIBC as 0.
* config/rs6000/aix.h (OPTION_GLIBC): Define as 0.
On Mon, Jan 17, 2022 at 12:11:59AM +0100, FX via Gcc-patches wrote:
> This patch is the third in my “signaling NaN” series.
> For targets with IEEE support but without the issignaling macro in libc
> (i.e., everywhere except glibc), this allows us to provide a fallback
> implementation.
This doesn't seem to handle the powerpc* IBM double double long double.
__LDBL_IS_IEC_60559__ isn't defined for this type, because it is far from
an IEEE754 type, but it has signaling NaNs - as can be seen in glibc
libc/sysdeps/ieee754/ldbl-128ibm/s_issignalingl.c
the type is a pair of doubles and whether it is a sNaN or qNaN is determined
by whether the first double is a sNaN or qNaN.
2022-01-25 Jakub Jelinek <jakub@redhat.com>
* ieee/issignaling_fallback.h (__issignalingl): Define for
IBM extended long double are returning __issignaling on the
first double.
When we have a pointer relational compare we have stronger guarantees
about overflow, in particular rewriting BASE0 + STEP0 cmp BASE1 + STEP1
as BASE0 + STEP0 - STEP1 cmp BASE1 is always valid and the new IV0
does not overflow. The patch basically reverts the previous change
when pointers are involved, keeping only the more conservative handling
for equality compares which can involve comparing different object
addresses.
2022-01-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/104214
* tree-ssa-loop-niter.cc (number_of_iterations_cond): Use
stronger guarantees for relational pointer compares when
rewriting BASE0 + STEP0 cmp BASE1 + STEP1 as
BASE0 + STEP0 - STEP1 cmp BASE1.
* gcc.dg/vect/pr81196-2.c: New variant testcase only
requiring vect_int.
_dl_find_object returns success even if no unwind information has been
found, and dlfo_eh_frame is NULL.
libgcc/ChangeLog:
PR libgcc/104207
* unwind-dw2-fde-dip.c (_Unwind_Find_FDE): Add NULL check.
In GCC 7.x and earlier, while it had -mabi=ieeelongdouble option, that option
was undocumented and unsupported.
In GCC 8.1 that option got documented and -mabi=ieeelongdouble long double started
to be mangled as U10__float128.
In GCC 9 and backported to before 8.2 release, that mangling changed to
u9__ieee128 and a support for emitting compatibility mangling aliases have
been added.
Unfortunately, as mentioned in the PR, those don't really work well in many
cases, the free_lang_data pass throws away important trees, so e.g. with
-flto -ffat-lto-objects the compiler often ICEs on templates that involve
IEEE quad long double arguments etc. because the mangling was done too late
(at final time).
Furthermore, lto1's mangler is not the C++ mangler, so with -flto it would
often emit as "mangled identifiers" something that wasn't a valid assembler
identifier, e.g. operator+ etc.
While it is possible to do such mangling earlier, e.g. at the same time when
the C++ FE emits its mangling aliases and untested proof of concept is in
the PR, there seems to be agreement that we shouldn't bother with this
ABI compatibility with something that probably nobody really used.
GCC 8.2 already uses the new mangling, it was just a few months, but more
importantly, libstdc++ support for IEEE quad long double on
powerpc64le-linux was only added in GCC 11, and glibc support for that some
weeks after 8.2 got released.
So, the following patch just drops those aliases.
2022-01-25 Jakub Jelinek <jakub@redhat.com>
PR target/104172
gcc/
* config/rs6000/rs6000-internal.h (rs6000_passes_ieee128): Don't
declare.
* config/rs6000/rs6000.cc (rs6000_passes_ieee128,
ieee128_mangling_gcc_8_1): Remove.
(TARGET_ASM_GLOBALIZE_DECL_NAME): Don't redefine.
(rs6000_mangle_type): Return "u9__ieee128" instead of
ieee128_mangling_gcc_8_1 ? "U10__float128" : "u9__ieee128".
(rs6000_globalize_decl_name): Remove.
* config/rs6000/rs6000-call.cc (init_cumulative_args,
rs6000_function_arg_advance_1): Don't set rs6000_passes_ieee128.
Stephan Bergmann reported that our -Wbidi-chars breaks the build
of LibreOffice because we warn about UCNs even when their usage
is correct: LibreOffice constructs strings piecewise, as in:
aText = u"\u202D" + aText;
and warning about that is overzealous. Since no editor (AFAIK)
interprets UCNs to show them as Unicode characters, there's less
risk in misinterpreting them, and so perhaps we shouldn't warn
about them by default. However, identifiers containing UCNs or
programs generating other programs could still cause confusion,
so I'm keeping the UCN checking. To turn it on, you just need
to use -Wbidi-chars=unpaired,ucn or -Wbidi-chars=any,ucn.
The implementation is done by using the new EnumSet feature.
PR preprocessor/104030
gcc/c-family/ChangeLog:
* c.opt (Wbidi-chars): Mark as EnumSet. Also accept =ucn.
gcc/ChangeLog:
* doc/invoke.texi: Update documentation for -Wbidi-chars.
libcpp/ChangeLog:
* include/cpplib.h (enum cpp_bidirectional_level): Add
bidirectional_ucn. Set values explicitly.
* internal.h (cpp_reader): Adjust warn_bidi_p.
* lex.cc (maybe_warn_bidi_on_close): Don't warn about UCNs
unless UCN checking is on.
(maybe_warn_bidi_on_char): Likewise.
gcc/testsuite/ChangeLog:
* c-c++-common/Wbidi-chars-10.c: Turn on UCN checking.
* c-c++-common/Wbidi-chars-11.c: Likewise.
* c-c++-common/Wbidi-chars-14.c: Likewise.
* c-c++-common/Wbidi-chars-16.c: Likewise.
* c-c++-common/Wbidi-chars-17.c: Likewise.
* c-c++-common/Wbidi-chars-4.c: Likewise.
* c-c++-common/Wbidi-chars-5.c: Likewise.
* c-c++-common/Wbidi-chars-6.c: Likewise.
* c-c++-common/Wbidi-chars-7.c: Likewise.
* c-c++-common/Wbidi-chars-8.c: Likewise.
* c-c++-common/Wbidi-chars-9.c: Likewise.
* c-c++-common/Wbidi-chars-ranges.c: Likewise.
* c-c++-common/Wbidi-chars-18.c: New test.
* c-c++-common/Wbidi-chars-19.c: New test.
* c-c++-common/Wbidi-chars-20.c: New test.
* c-c++-common/Wbidi-chars-21.c: New test.
* c-c++-common/Wbidi-chars-22.c: New test.
* c-c++-common/Wbidi-chars-23.c: New test.
For targets with IEEE support but without the issignaling macro in libc
(currently, everywhere except glibc), this allows us to provide a fallback
implementation. In order to keep the code in ieee_helper.c relatively
readable, I've put that new implementation in a separate file,
issignaling_fallback.h.
libgfortran/ChangeLog:
* ieee/issignaling_fallback.h: New file.
* ieee/ieee_helper.c: Include issignaling_fallback.h when target
does not define issignaling macro.
gcc/testsuite/ChangeLog:
* gfortran.dg/ieee/signaling_1.f90: Do not require issignaling.
* gfortran.dg/ieee/signaling_2.f90: Add comment.
* gfortran.dg/ieee/signaling_3.f90: New test.
This optimizations were originally in glibc, but was removed
and suggested that they were a good fit as gcc builtins[1].
feclearexcept and feraiseexcept were extended (in comparison to the
glibc version) to accept any combination of the accepted flags, not
limited to just one flag bit at a time anymore.
The builtin expanders needs knowledge of the target libc's FE_*
values, so they are limited to expand only to suitable libcs.
[1] https://sourceware.org/legacy-ml/libc-alpha/2020-03/msg00047.htmlhttps://sourceware.org/legacy-ml/libc-alpha/2020-03/msg00080.html
2020-08-13 Raoni Fassina Firmino <raoni@linux.ibm.com>
gcc/
PR target/94193
* builtins.cc (expand_builtin_fegetround): New function.
(expand_builtin_feclear_feraise_except): New function.
(expand_builtin): Add cases for BUILT_IN_FEGETROUND,
BUILT_IN_FECLEAREXCEPT and BUILT_IN_FERAISEEXCEPT.
* config/rs6000/rs6000.md (fegetroundsi): New pattern.
(feclearexceptsi): New Pattern.
(feraiseexceptsi): New Pattern.
* doc/extend.texi: Add a new introductory paragraph about the
new builtins.
* doc/md.texi: (fegetround@var{m}): Document new optab.
(feclearexcept@var{m}): Document new optab.
(feraiseexcept@var{m}): Document new optab.
* optabs.def (fegetround_optab): New optab.
(feclearexcept_optab): New optab.
(feraiseexcept_optab): New optab.
gcc/testsuite/
PR target/94193
* gcc.target/powerpc/builtin-feclearexcept-feraiseexcept-1.c: New test.
* gcc.target/powerpc/builtin-feclearexcept-feraiseexcept-2.c: New test.
* gcc.target/powerpc/builtin-fegetround.c: New test.
Signed-off-by: Raoni Fassina Firmino <raoni@linux.ibm.com>
Avoid using the macro current_template_depth, which expands to an
expression that uses __FUNCTION__, within the signature of a function.
PR c++/104197
gcc/cp/ChangeLog:
* pt.cc (make_auto_1): Use -1 as a placeholder default argument
for level.
Here the call to (the &&-qualified) toLower() is incorrectly rejected
during overload resolution because the object expression is encoded as
an lvalue when it's really a prvalue. The object expression,
instance()->applicationName(), is encoded as an INDIRECT_REF of a
COMPOUND_EXPR
*(*instance ();, &TARGET_EXPR <D.2383, QCoreApplication::applicationName ()>;);
which lvalue_kind deems an lvalue.
This issue is similar to PR88103 except that here the original compound
object expression is a prvalue rather than an xvalue. The fix there was to
adjust the result of unary_complex_lvalue in build_class_member_access_expr
so that xvalueness of the original expression is preserved. This patch
extends that fix so that rvalueness is preserved more generally.
PR c++/104173
gcc/cp/ChangeLog:
* typeck.cc (build_class_member_access_expr): Extend
unary_complex_lvalue result adjustment to preserve all
rvalues, not just xvalues.
gcc/testsuite/ChangeLog:
* g++.dg/cpp0x/ref-qual21.C: New test.
contrib/ChangeLog:
* gcc-changelog/git_commit.py: New files in toplev must
be explicitly marked as "New file".
* gcc-changelog/test_email.py: Test.
* gcc-changelog/test_patches.txt: Add test.
On Sat, Jan 22, 2022 at 01:47:08AM +0100, Jakub Jelinek via Gcc-patches wrote:
> I think with the 2) patch I achieve what we want for Fortran, for 1)
> the only behavior from gcc 11 is that
> -fsanitize-coverage=trace-cmp,trace-cmp is now rejected.
> This is mainly from the desire to disallow
> -fconvert=big-endian,little-endian or -Wbidi-chars=bidirectional,any
> etc. where it would be confusing to users what exactly it means.
> But it is the only from these options that actually acts as an Enum
> bit set, each enumerator can be specified with all the others.
> So one option would be stop requiring the EnumSet implies Set properties
> must be specified and just require that either they are specified on all
> EnumValues, or on none of them; the latter case would be for
> -fsanitize-coverage= and the non-Set case would mean that all the
> EnumValues need to have disjoint Value bitmasks and that they can
> be all specified and unlike the Set case also repeated.
> Thoughts on this?
Here is an incremental patch to the first two patches of the series
that implements EnumBitSet that fully restores the -fsanitize-coverage
GCC 11 behavior.
2022-01-24 Jakub Jelinek <jakub@redhat.com>
PR sanitizer/104158
* opt-functions.awk (var_set): Handle EnumBitSet property.
* optc-gen.awk: Don't disallow RejectNegative if EnumBitSet is
specified.
* opts.h (enum cl_enum_var_value): New type.
* opts-common.cc (decode_cmdline_option): Use CLEV_* values.
Handle CLEV_BITSET.
(cmdline_handle_error): Handle CLEV_BITSET.
* opts.cc (test_enum_sets): Also test EnumBitSet requirements.
* doc/options.texi (EnumBitSet): Document.
* common.opt (fsanitize-coverage=): Use EnumBitSet instead of
EnumSet.
(trace-pc, trace-cmp): Drop Set properties.
* gcc.dg/sancov/pr104158-7.c: Adjust for repeating of arguments
being allowed.
This patch on top of the previously posted option handling changes patch
allows specifying -fconvert=swap,r16_ieee etc. (but will error on it
when not on powerpc64le because in the library such swapping is only
implemented for HAVE_REAL_17).
2022-01-24 Jakub Jelinek <jakub@redhat.com>
* lang.opt (fconvert=): Add EnumSet property and mention also
r16_ieee and r16_ibm arguments.
(big-endian, little-endian, native, swap): Add Set(1) property.
(r16_ieee, r16_ibm): New EnumValue entries with Set(2) property.
* trans-types.cc (gfc_init_kinds): Emit gfc_fatal_error for
-fconvert=r16_ieee or -fconvert=r16_ibm when R16_IEEE <=> R16_IBM
conversions aren't supported.
This is incremental patch to fix up -fsanitize-coverage= option
handling, allow -fno-sanitize-coverage= again, allow both
options together in one option or make
-fsanitize-coverage=trace-pc -fsanitize-coverage=trace-cmp
actually enable both suboptions rather than the last one.
2022-01-24 Jakub Jelinek <jakub@redhat.com>
PR sanitizer/104158
* common.opt (flag_sanitize_coverage): Remove Variable entry.
(fsanitize-coverage=): Remove RejectNegative property, add
Var(flag_sanitize_coverage) and EnumSet properties.
(trace-pc): Add Set(1) property.
(trace-cmp): Add Set(2) property.
* opts.cc (common_handle_option): Don't handle
OPT_fsanitize_coverage_.
* gcc.dg/spellcheck-options-24.c: New test.
* gcc.dg/sancov/pr104158-1.c: New test.
* gcc.dg/sancov/pr104158-2.c: New test.
* gcc.dg/sancov/pr104158-3.c: New test.
* gcc.dg/sancov/pr104158-4.c: New test.
* gcc.dg/sancov/pr104158-5.c: New test.
* gcc.dg/sancov/pr104158-6.c: New test.
* gcc.dg/sancov/pr104158-7.c: New test.
The following patch is infrastructure support for at least 3 different
options that need changes:
1) PR104158 talks about a regression with the -fsanitizer-coverage=
option; in GCC 11 and older and on trunk prior to r12-1177, this
option behaved similarly to -f{,no-}sanitizer{,-recover}= options,
namely that the option allows negative and argument of the option
is a list of strings, each of them has some enumerator and
-fsanitize-coverage= enabled those bits in the underlying
flag_sanitize_coverage, while -fno-sanitize-coverage= disabled them.
So, -fsanitize-coverage=trace-pc,trace-cmp was equivalent to
-fsanitize-coverage=trace-pc -fsanitize-coverage=trace-cmp and both
set flag_sanitize_coverage to
(SANITIZE_COV_TRACE_PC | SANITIZE_COV_TRACE_CMP)
Also, e.g.
-fsanitize-coverage=trace-pc,trace-cmp -fno-sanitize-coverage=trace-pc
would in the end set flag_sanitize_coverage to
SANITIZE_COV_TRACE_CMP (first set both bits, then subtract one)
The r12-1177 change, I think done to improve argument misspelling
diagnostic, changed the option incompatibly in multiple ways,
-fno-sanitize-coverage= is now rejected, only a single argument
is allowed, not multiple and
-fsanitize-coverage=trace-pc -fsanitize-coverage=trace-cmp
enables just SANITIZE_COV_TRACE_CMP and not both (each option
overrides the previous value)
2) Thomas Koenig wants to extend Fortran -fconvert= option for the
ppc64le real(kind=16) swapping support; currently the option
accepts -fconvert={native,swap,big-endian,little-endian} and the
intent is to add support for -fconvert=r16_ibm and -fconvert=r16_ieee
(that alone is just normal Enum), but also to handle
-fconvert=swap,r16_ieee or -fconvert=r16_ieee,big-endian but not
-fconvert=big-endian,little-endian - the
native/swap/big-endian/little-endian are one mutually exclusive set
and r16_ieee/r16_ibm another one.
See https://gcc.gnu.org/pipermail/gcc-patches/2022-January/587943.html
and thread around that.
3) Similarly Marek Polacek wants to extend the -Wbidi-chars= option,
such that it will handle not just the current
-Wbidi-chars={none,bidirectional,any}, but also -Wbidi-chars=ucn
and bidirectional,ucn and ucn,any etc. Again two separate sets,
one none/bidirectional/any and another one ucn.
See https://gcc.gnu.org/pipermail/gcc-patches/2022-January/588960.html
The following patch adds framework for this and I'll post incremental
patches for 1) and 2).
As I've tried to document, such options are marked by additional
EnumSet property on the option and in that case all the EnumValues
in the Enum referenced from it must use a new Set property with set
number (initially I wanted just mark last enumerator in each mutually
exclusive set, but optionlist is sorted and so it doesn't really work
well). So e.g. for the Fortran -fconvert=, one specifies:
fconvert=
Fortran RejectNegative Joined Enum(gfc_convert) EnumSet Var(flag_convert) Init(GFC_FLAG_CONVERT_NATIVE)
-fconvert=<big-endian|little-endian|native|swap|r16_ieee|r16_ibm> The endianness used for unformatted files.
Enum
Name(gfc_convert) Type(enum gfc_convert) UnknownError(Unrecognized option to endianness value: %qs)
EnumValue
Enum(gfc_convert) String(big-endian) Value(GFC_FLAG_CONVERT_BIG) Set(1)
EnumValue
Enum(gfc_convert) String(little-endian) Value(GFC_FLAG_CONVERT_LITTLE) Set(1)
EnumValue
Enum(gfc_convert) String(native) Value(GFC_FLAG_CONVERT_NATIVE) Set(1)
EnumValue
Enum(gfc_convert) String(swap) Value(GFC_FLAG_CONVERT_SWAP) Set(1)
EnumValue
Enum(gfc_convert) String(r16_ieee) Value(GFC_FLAG_CONVERT_R16_IEEE) Set(2)
EnumValue
Enum(gfc_convert) String(r16_ibm) Value(GFC_FLAG_CONVERT_R16_IBM) Set(2)
and this says to the option handling code that
1) if only one arg is specified to one instance of the option, it can be any
of those 6
2) if two args are specified, one has to be from the first 4 and another
from the last 2, in any order
3) at most 2 args may be specified (there are just 2 sets)
There is a requirement on the Value values checked in self-test, the
values from one set ored together must be disjunct from values from
another set ored together. In the Fortran case, the first 4 are 0-3
so mask is 3, and the last 2 are 4 and 8, so mask is 12.
When say -fconvert=big-endian is specified, it sets the first set
to GFC_FLAG_CONVERT_BIG (2) but doesn't modify whatever value the
other set had, so e.g.
-fconvert=big-endian -fconvert=r16_ieee
-fconvert=r16_ieee -fconvert=big-endian
-fconvert=r16_ieee,big_endian
-fconvert=big_endian,r16_ieee
all behave the same.
Also, with the EnumSet support, it is now possible to allow
not specifying RejectNegative - we can set some set's value and
then clear it and set it again to some other value etc.
I think with the 2) patch I achieve what we want for Fortran, for 1)
the only behavior from gcc 11 is that
-fsanitize-coverage=trace-cmp,trace-cmp is now rejected.
This is mainly from the desire to disallow
-fconvert=big-endian,little-endian or -Wbidi-chars=bidirectional,any
etc. where it would be confusing to users what exactly it means.
But it is the only from these options that actually acts as an Enum
bit set, each enumerator can be specified with all the others.
So one option would be stop requiring the EnumSet implies Set properties
must be specified and just require that either they are specified on all
EnumValues, or on none of them; the latter case would be for
-fsanitize-coverage= and the non-Set case would mean that all the
EnumValues need to have disjoint Value bitmasks and that they can
be all specified and unlike the Set case also repeated.
Thoughts on this?
2022-01-24 Jakub Jelinek <jakub@redhat.com>
PR sanitizer/104158
* opt-functions.awk (var_set): Handle EnumSet property.
* optc-gen.awk: Don't disallow RejectNegative if EnumSet is
specified.
* opt-read.awk: Handle Set property.
* opts.h (CL_ENUM_SET_SHIFT, CL_ERR_ENUM_SET_ARG): Define.
(struct cl_decoded_option): Mention enum in value description.
Add mask member.
(set_option): Add mask argument defaulted to 0.
* opts.cc (test_enum_sets): New function.
(opts_cc_tests): Call it.
* opts-common.cc (enum_arg_to_value): Change return argument
from bool to int, on success return index into the cl_enum_arg
array, on failure -1. Add len argument, if non-0, use strncmp
instead of strcmp.
(opt_enum_arg_to_value): Adjust caller.
(decode_cmdline_option): Handle EnumSet represented as
CLVC_ENUM with non-zero var_value. Initialize decoded->mask.
(decode_cmdline_options_to_array): CLear opt_array[0].mask.
(handle_option): Pass decoded->mask to set_options last argument.
(generate_option): Clear decoded->mask.
(generate_option_input_file): Likewise.
(cmdline_handle_error): Handle CL_ERR_ENUM_SET_ARG.
(set_option): Add mask argument, use it for CLVC_ENUM.
(control_warning_option): Adjust enum_arg_to_value caller.
* doc/options.texi: Document Set and EnumSet properties.
On Sat, Jan 22, 2022 at 10:32:21AM +0100, Martin Liška wrote:
> I've just noticed the patch broke a few cross compilers:
>
> s390x-ibm-tpf:
>
> /home/marxin/buildworker/zen2-cross-compilers/build/gcc/common/config/s390/s390-common.cc: In function ‘bool s390_supports_split_stack(bool, gcc_options*)’:
> /home/marxin/buildworker/zen2-cross-compilers/build/gcc/common/config/s390/s390-common.cc:126:13: error: ‘struct gcc_options’ has no member named ‘x_linux_libc’
> 126 | if (opts->x_linux_libc == LIBC_GLIBC)
> | ^~~~~~~~~~~~
>
> i686-kopensolaris-gnu, i686-symbolics-gnu
>
> /home/marxin/buildworker/zen2-cross-compilers/build/gcc/common/config/i386/i386-common.cc: In function ‘bool ix86_supports_split_stack(bool, gcc_options*)’:
> /home/marxin/buildworker/zen2-cross-compilers/build/gcc/common/config/i386/i386-common.cc:1721:13: error: ‘struct gcc_options’ has no member named ‘x_linux_libc’
> 1721 | if (opts->x_linux_libc != LIBC_GLIBC)
> | ^~~~~~~~~~~~
> make[1]: *** [Makefile:2418: i386-common.o] Error 1
>
> Can you please take a look? Btw. do you have a bugzilla account?
I bet instead of opts->x_linux_libc != LIBC_GLIBC it needs to use
#ifdef OPTION_GLIBC
if (!OPTION_GLIBC)
#endif
or so. I think the first committed patch actually used that
but used it in #if directive, which is wrong because it is something
that needs to be evaluated at runtime.
That doesn't work well either, because the *supports_split_stack
hooks have opts argument and OPTION_GLIBC doesn't take that.
So, here is a patch that introduces OPTION_*_P macros that take opts
as an argument and redefines OPTION_* using those (similarly to how
the option scripts create TARGET_*_P and TARGET_* macros).
2022-01-24 Jakub Jelinek <jakub@redhat.com>
PR bootstrap/104170
* config/linux.h (OPTION_GLIBC_P, OPTION_UCLIBC_P,
OPTION_BIONIC_P, OPTION_MUSL_P): Define.
(OPTION_GLIBC, OPTION_UCLIBC, OPTION_BIONIC, OPTION_MUSL): Redefine
using OPTION_*_P macros.
* config/alpha/linux.h (OPTION_GLIBC_P, OPTION_UCLIBC_P,
OPTION_BIONIC_P, OPTION_MUSL_P): Define.
(OPTION_GLIBC, OPTION_UCLIBC, OPTION_BIONIC, OPTION_MUSL): Redefine
using OPTION_*_P macros.
* config/rs6000/linux.h (OPTION_GLIBC_P, OPTION_UCLIBC_P,
OPTION_BIONIC_P, OPTION_MUSL_P): Define.
(OPTION_GLIBC, OPTION_UCLIBC, OPTION_BIONIC, OPTION_MUSL): Redefine
using OPTION_*_P macros.
* config/rs6000/linux64.h (OPTION_GLIBC_P, OPTION_UCLIBC_P,
OPTION_BIONIC_P, OPTION_MUSL_P): Define.
(OPTION_GLIBC, OPTION_UCLIBC, OPTION_BIONIC, OPTION_MUSL): Redefine
using OPTION_*_P macros.
* config/fuchsia.h (OPTION_MUSL_P): Redefine.
* config/glibc-stdint.h (OPTION_MUSL_P): Define if not defined.
* common/config/s390/s390-common.cc (s390_supports_split_stack): Re-add
ATTRIBUTE_UNUSED to opts parameter. If OPTION_GLIBC_P is defined, use
OPTION_GLIBC_P (opts) as condition, otherwise assume if (false).
* common/config/i386/i386-common.cc (ix86_supports_split_stack): If
OPTION_GLIBC_P is defined use !OPTION_GLIBC_P (opts) as condition,
otherwise assume if (true).
Extension version might be different among different ISA spec version,
add explicitly isa-spec version to prevent that might fail when build
GCC with different default ISA version.
gcc/testsuite/ChangeLog
* gcc.target/riscv/attribute-19.c: Add -misa-spec=2.2
I-ext 2.0 already included zicsr and zifencei, skip that prevent
confusing binutils.
gcc/ChangeLog
* common/config/riscv/riscv-common.cc (riscv_subset_list::to_string):
Skip zicsr and zifencei if I-ext is 2.0.
Bump default ISA spec to newer version 20191213, current default ISA spec
is 2.2, but it's already out of date for a long time, sync with binutils
ISA version, convention in toolchain use.
gcc/ChangeLog:
* config.gcc: Modify default isa_spec version.
This patch correct the type of niter->control.base, when it is updated
as a PLUS expr.
During build PLUS expr, the result type should align with the type of
the operands.
PR tree-optimization/102087
gcc/ChangeLog:
* tree-ssa-loop-niter.cc (number_of_iterations_until_wrap):
Correct PLUS result type.
gcc/testsuite/ChangeLog:
* gcc.dg/pr102087_1.c: New test.
After commit 591b6e00d1 " riscv: fix -Wformat-diag errors ", some strings in implement was changed.
This patch update the check info in testcases to sync with it.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/arch-9.c: Update the check info.
* gcc.target/riscv/arch-10.c: Ditto.
* gcc.target/riscv/arch-12.c: Ditto.
libstdc++-v3/ChangeLog:
PR libstdc++/104032
* include/std/spanstream (basic_spanbuf(basic_spanbuf&&)): Use
mem-initializer for _M_buf.
(basic_spanbuf::Operator=(basic_spanbuf&&)): Fix ill-formed
member access.
* testsuite/27_io/spanstream/2.cc: New test.
We can use the new from_chars implementation when long double and double
have the same representation.
libstdc++-v3/ChangeLog:
* src/c++17/floating_from_chars.cc (USE_STRTOD_FOR_FROM_CHARS):
Define macro for case where std::from_chars is implemented in
terms of strtod, strtof or strtold.
(buffer_resource, valid_fmt, find_end_of_float, pattern)
(from_chars_impl, make_result, reserve_string): Do not define
unless USE_STRTOD_FOR_FROM_CHARS is defined.
(from_chars): Define when at least one of USE_LIB_FAST_FLOAT and
USE_STRTOD_FOR_FROM_CHARS is defined, instead of
_GLIBCXX_HAVE_USELOCALE. Use fast_float for long double when it
is binary64.
I broke this unintentionally in r12-4259.
libstdc++-v3/ChangeLog:
PR libstdc++/104174
* include/bits/hashtable_policy.h (_Map_base): Add partial
specialization for maps with const key types.
* testsuite/23_containers/unordered_map/104174.cc: New test.
The non-atomic store that sets both reference counts to zero uses a
type-punned pointer, which has undefined behaviour. We could use memset
to write 8 bytes, but we don't actually need it to be a single store
anyway. No other thread can observe the values, that's why it's safe to
use non-atomic stores in the first place. So we can just set each count
to zero.
With -fstore-merging (which is enabled by default at -O2) GCC produces
the same code for this as for memset or the type punned store. Clang
does that store merging even at -O1.
libstdc++-v3/ChangeLog:
PR libstdc++/104019
* include/bits/shared_ptr_base.h (_Sp_counted_base<>::_M_release):
Set members to zero without type punning.
There are two underlying bugs in the designated initialization of char array
fields by string literals that cause:
(1) Rejection of valid cases with:
(a) brace-enclosed string literal initializer (of any valid size), or
(b) unbraced string literal shorter than the target char array field.
(2) Acceptance of invalid cases with designators appearing within the braces
of a braced string literal, in which case the bogus 'designator' was
being entirely ignored and the string literal treated as a positional
initializer.
The fixes above allow to address a FIXME in cp_complete_array_type:
/* FIXME: this code is duplicated from reshape_init.
Probably we should just call reshape_init here? */
I believe that this was obstructed by the designator bugs (see comment here
https://patchwork.ozlabs.org/project/gcc/list/?series=199783)
PR c++/55227
gcc/cp/ChangeLog:
* decl.cc (reshape_init_r): Only call has_designator_check when
first_initializer_p or for the inner constructor element.
(cp_complete_array_type): Call reshape_init on braced-init-list.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/desig21.C: New test.
This is a simple patch which simplifies the __builtin_aarch64_sqrt* builtins
into the internal function SQRT which allows for constant folding and other
optimizations at the gimple level. It was originally suggested we do to
__builtin_sqrt just for __builtin_aarch64_sqrtdf when -fno-math-errno
but since r6-4969-g686ee9719a4 we have the internal function SQRT which does
the same so it makes we don't need to check -fno-math-errno either now.
Applied as approved after bootstrapped and tested on aarch64-linux-gnu with no regressions.
PR target/64821
gcc/ChangeLog:
* config/aarch64/aarch64-builtins.cc
(aarch64_general_gimple_fold_builtin): Handle
__builtin_aarch64_sqrt* and simplify into SQRT internal
function.
gcc/testsuite/ChangeLog:
* gcc.target/aarch64/vsqrt-1.c: New test.
* gcc.target/aarch64/vsqrt-2.c: New test.
