git.libre-soc.org Git

c++: Error recovery with erroneous DECL_INITIAL [PR94475]

Here we're ICE'ing in do_narrow during error-recovery, because ocp_convert
returns error_mark_node after it attempts to reduce a const decl to its
erroneous DECL_INITIAL via scalar_constant_value, and we later pass this
error_mark_node to fold_build2 which isn't prepared to handle error_mark_nodes.

We could fix this ICE in do_narrow by checking if ocp_convert returns
error_mark_node, but for the sake of consistency and for better error recovery
it seems it'd be preferable if ocp_convert didn't care that a const decl's
initializer is erroneous and would instead proceed as if the decl was not const,
which is the approach that this patch takes.

gcc/cp/ChangeLog:

PR c++/94475
* cvt.c (ocp_convert): If the result of scalar_constant_value is
erroneous, ignore it and use the original expression.

gcc/testsuite/ChangeLog:

PR c++/94475
* g++.dg/conversion/err-recover2.C: New test.
* g++.dg/diagnostic/pr84138.C: Remove now-bogus warning.
* g++.dg/warn/Wsign-compare-8.C: Remove now-bogus warning.

Make it possible to have different instrumented and feedback builds without copying gcda files around [pr93401]

Hi,
in GCC 8 we changed -fprofile-generate=<path> to use mangled absolute paths in
the <path> directory. This was necessary to avoid clashes of files when gcc is
executed from different directories to build different sources of same
filename.

However this made it difficult to build projects on setups where instrumented
build is done in one directory, feedback build in different and possibly
training happens in yet another directory structure.  This happens i.e. for
Firefox builds for month or two.

This patch adds -fprofile-prefix-path that can be used to inform gcc where the
root of build directory is and strip it form the gcda filenames.
This is similar to exisitng debug-prefix-map but without the map feature since
it seems useless for profile data.

We spent quite some time with Maritn Liska discussing options and found no
better solution.  I was looking how this work on LLVM and they produce single
profdata file which is then transformed into kind of simple database by
llvmprofdata tool.  This database keys functions by filename and symbol name.
If you arrane two files with same name define static variable with same symbol
name this gets messedup and result in wrong info. So I think this is not very
good solution and preffer the extra option.

Bootstrapped/regtested x86_64-linux. I plan to commit it later today if there
are no complains.

I suppose our manual could have some central section on profile feedback
explaining the whole setup at one place.

Honza

PR gcov-profile/93401
* common.opt (profile-prefix-path): New option.
* coverae.c: Include diagnostics.h.
(coverage_init): Strip profile prefix path.
* doc/invoke.texi (-fprofile-prefix-path): Document.

early-remat: Handle sets of multiple candidate regs [PR94605]

early-remat.c:process_block wasn't handling insns that set multiple
candidate registers, which led to an assertion failure at the end
of the main loop.

Instructions that set two pseudos aren't rematerialisation candidates in
themselves, but we still need to track them if another instruction that
sets the same register is a rematerialisation candidate.

2020-04-16 Richard Sandiford <richard.sandiford@arm.com>

gcc/
PR rtl-optimization/94605
* early-remat.c (early_remat::process_block): Handle insns that
set multiple candidate registers.

gcc/testsuite/
PR rtl-optimization/94605
* gcc.target/aarch64/sve/pr94605.c: New test.

cleanup graphite results

This removes { dg-final { scan-tree-dump "tiled" "graphite" } } scans
from graphite tests that pass/fail dependent on the ISL version used.
Note all scans match the actually dumped "not tiled" messages with
ISL 0.12 and not the alternative "tiled by <number>". With ISL
0.22 neither is printed because the tiling infrastructure doesn't
expect the new schedule layout (though looking at a few cases it
looks superior with more dimensions marked as permutable.

Anyway, the scans have nothing to do with interchange and just
add to testsuite noise.

2020-04-16 Richard Biener <rguenther@suse.de>

* gcc.dg/graphite/interchange-1.c: Remove scan for tiled.
* gcc.dg/graphite/interchange-10.c: Likewise.
* gcc.dg/graphite/interchange-11.c: Likewise.
* gcc.dg/graphite/interchange-3.c: Likewise.
* gcc.dg/graphite/interchange-4.c: Likewise.
* gcc.dg/graphite/interchange-7.c: Likewise.
* gcc.dg/graphite/interchange-9.c: Likewise.
* gcc.dg/graphite/uns-interchange-9.c: Likewise.
* gfortran.dg/graphite/interchange-3.f90: Likewise.

middle-end/94614 - avoid multiword moves to nothing

This adjusts emit_move_multi_word to handle moves into paradoxical
subregs parts that are not there and adjusts lower-subregs
CLOBBER resolving to deal with those as well.

2020-04-16 Richard Biener <rguenther@suse.de>

PR middle-end/94614
* expr.c (emit_move_multi_word): Do not generate code when
the destination part is undefined_operand_subword_p.
* lower-subreg.c (resolve_clobber): Look through a paradoxica
subreg.

intl: Unbreak intl build with bison 3 when no regeneration is needed [PR92008]

As Iain reported, my change broke the case when one has bison >= 3,
but make decides there is no reason to regenerate plural.c, unfortunately
that seems to be a scenario I haven't tested.  The problem is that
the pregenerated plural.c has been generated with bison 1.35, but when
config.h says HAVE_BISON3, the code assumes it is the bison3 variant.
What used to work fine is when one has bison >= 3 and plural.c has been
regenerated (e.g. do touch intl/plural.y and it will work), or when
one doesn't have any bison (then nothing is regenerated, but HAVE_BISON3
isn't defined either), or when one has bison < 3 and doesn't need to
regenerate, or when one has bison < 3 and it is regenerated.

The following patch fixes this, by killing the HAVE_BISON3 macro from
config.h, and instead remembering the fact whether plural.c has been created
with bison < 3 or bison >= 3 in a separate new plural-config.h header.
The way this works:
- user doesn't have bison
- user has bison >= 3, but intl/{plural-config.h,plural.c} aren't older than intl/plural.y
- user has bison < 3, but intl/{plural-config.h,plural.c} aren't older than intl/plural.y
pregenerated !USE_BISON3 plural.c and plural-config.h from source
dir is used, nothing in the objdir
- user has bison >= 3 and intl/plural.y is newer
Makefile generates plural.c and USE_BISON3 plural-config.h in the
objdir, which is then used in preference to srcdir copies
- user has bison < 3 and intl/plural.y is newer
Makefile generates plural.c and !USE_BISON3 plural-config.h in the
objdir, which is then used in preference to srcdir copies
I have tested all these cases and make all-yes worked in all the cases.
If one uses the unsupported ./configure where srcdir == objdir, I guess
(though haven't tested) that it should still work, just it would be nice
if such people didn't try to check in the plural{.c,-config.h} they have
regenerated.
What doesn't work, but didn't work before either (just tested gcc-9 branch
too) is when one doesn't have bison and plural.y is newer than plural.c.
Don't do that ;)

2020-04-16  Jakub Jelinek  <jakub@redhat.com>

PR bootstrap/92008
intl/
* configure.ac: Remove HAVE_BISON3 AC_DEFINE.
* Makefile.in (HEADERS): Add plural-config.h.
(.y.c): Also create plural-config.h.
(dcigettext.o loadmsgcat.o plural.o plural-exp.o): Also depend
on plural-config.h.
(plural-config.h): Depend on plural.c.
* plural-exp.h: Include plural-config.h.  Use USE_BISON3 instead
of HAVE_BISON3.
* plural.y: Use USE_BISON3 instead of HAVE_BISON3.
* configure: Regenerated.
* plural.c: Regenerated.
* config.h.in: Regenerated.
* plural-config.h: Generated.
contrib/
* gcc_update: Add intl/plural.y dependency for intl/plural-config.h.

sra: Fix access verification (PR 94598)

get_ref_base_and_extent recognizes ARRAY_REFs with variable index but
into arrays of length one as constant offset accesses.  However,
max_size in such cases is extended to span the whole element.  This
confuses SRA verification when SRA also builds its (total
scalarization) access structures to describe fields under such array -
get_ref_base_and_extent returns different size and max_size for them.

Fixed by not performing the check for total scalarization accesses.
The subsequent check then had to be changed to use size and not
max_size too, which meant it has to be skipped when the access
structure describes a genuine variable array access.

Bootstrapped and tested on x86_64-linux.

2020-04-16  Martin Jambor  <mjambor@suse.cz>

PR tree-optimization/94598
* tree-sra.c (verify_sra_access_forest): Fix verification of total
scalarization accesses under access to one-element arrays.

testsuite/
* gcc.dg/tree-ssa/pr94598.c: New test.

testsuite: Move misplaced gcc.c-torture/pr92372.c test [PR92372]

This test got committed into a spot where nothing actually tests it.
As there is no main, I assume it was meant to be gcc.c-torture/compile/
test and the test PASSes after moving there (both x86_64-linux and
i686-linux). Though, it passed before the PR92372 fixes too.

2020-04-16 Jakub Jelinek <jakub@redhat.com>

PR ipa/92372
* gcc.c-torture/pr92372.c: Move ...
* gcc.c-torture/compile/pr92372.c: ... here.

bootstrap: Fix building with GCC 4.2 [PR89494]

GCC 4.2 (but I think not the latest tip of GCC 4.2 branch) has broken value
initialization, see PR33916.  The following patch provides a workaround for
that.  Tested with GCC 4.2 on a reduced testcase I've distilled from the
assign_param_data_one class which has been miscompiled the same.

2020-04-16  Jakub Jelinek  <jakub@redhat.com>

PR bootstrap/89494
* function.c (assign_parm_find_data_types): Add workaround for
BROKEN_VALUE_INITIALIZATION compilers.

intl: Allow building both with old bison and bison >= 3 [PR92008]

bison 3 apparently made a backwards incompatible change, dropped
YYLEX_PARAM/YYPARSE_PARAM support and instead needs %param or %lex-param
and %parse-param. Furthermore, there is no easy way to conditionalize
on bison version in the *.y files.
While e.g. glibc bumped bison requirement and just has the bison 3
compatible version, Richi said there are still systems with older bison
where we want to build gcc.

So, this patch instead determines during configure bison version, and
depending on that when building plural.c (if building it at all) tweaks
what is passed over to bison if needed.

Tested with both bison 3 and bison 1.35, in each case with reconfiguring
intl and building with make all-yes (as in my setup intl isn't normally
used).

2020-04-16 Jakub Jelinek <jakub@redhat.com>

PR bootstrap/92008
* configure.ac: Add check for bison >= 3, AC_DEFINE HAVE_BISON3
and AC_SUBST BISON3_YES and BISON3_NO.
* Makefile.in (.y.c): Prefix $(YACC) invocation with @BISON3_NO@,
add @BISON3_YES@ prefixed rule to adjust the *.y source using sed
and adjust output afterwards.
* plural-exp.h (PLURAL_PARSE): If HAVE_BISON3 is defined, use
struct parse_args * type for arg instead of void *.
* plural.y: Add magic /* BISON3 ... */ comments with bison >= 3
directives.
(YYLEX_PARAM, YYPARSE_PARAM): Don't define if HAVE_BISON3 is defined.
(yylex, yyerror): Adjust prototypes and definitions if HAVE_BISON3
is defined.
* plural.c: Regenerated.
* config.h.in: Regenerated.
* configure: Regenerated.

pretty-print SSA names

This adds the SSA name version to the gdb pretty-printing of SSA names.

(gdb) p (tree)$1
$5 = <ssa_name 0x7ffff68435a0 323>

2020-04-16 Richard Biener <rguenther@suse.de>

* gdbhooks.py (TreePrinter): Print SSA_NAME_VERSION of SSA_NAME
nodes.

libstdc++: Fix -Wunused-parameter warning in test

* testsuite/20_util/unsynchronized_pool_resource/allocate.cc: Remove
name of unused parameter.

c++: Fix pasto in structured binding diagnostics [PR94571]

This snippet has been copied from the non-structured binding declaration
parsing later in the function, and while for non-structured bindings
it can be followed by comma or semicolon, structured bindings may be
only followed by semicolon.

Or, do we want to have a different message for the case when there is
a comma (and keep this corrected one only if there is something else)
that would explain better what is the bug (or add a fix-it hint)?
Marek said in the PR that clang++ reports
error: decomposition declaration must be the only declaration in its group

There is another thing Marek noted (though, something for different spot),
that diagnostic for auto x(1), [e,f] = test2; could also use a clearer
wording like the above (or a fix-it hint), but the question is if we should
assume [ after , as a structured binding or if we should do some tentative
parsing first to figure out if it looks like a structured binding.

2020-04-16 Jakub Jelinek <jakub@redhat.com>

PR c++/94571
* parser.c (cp_parser_simple_declaration): Fix up a pasto in
diagnostics.

* g++.dg/cpp1z/decomp51.C: New test.

Daily bump.

runtime: use 64 bits of hash seed on arm64

This is the same issue as #33960, but on gofrontend.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/220297

libstdc++: Add comparison operators to std::filesystem types

Some more C++20 changes from P1614R2, "The Mothership has Landed".

* include/bits/fs_dir.h (file_status): Define operator== for C++20.
(directory_entry): Define operator<=> and remove redundant comparison
operators for C++20.
* include/bits/fs_fwd.h (space_info): Define operator== for C++20.
* include/bits/fs_path.h (path): Define operator<=> and remove
redundant comparison operators for C++20.
* testsuite/27_io/filesystem/path/compare/compare.cc: Fix comment.
* testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
* testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
* testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.

Go Gcc_backend class: mark prefetch as novops

PR go/94607
* go-gcc.cc (class Gcc_backend): Define builtin_const,
builtin_noreturn, builtin_novops.
(Gcc_backend::define_builtin): Change const_p and noreturn_p
parameters to a single flags parameter. Change all callers.
(Gcc_backend::Gcc_backend): Pass novops for prefetch.

libstdc++: Add comparison operators to types from Utilities clause

Some more C++20 changes from P1614R2, "The Mothership has Landed".

This removes all redundant equality and inequality operators in the
Utilities clause, as they can be synthesized from the remaining equality
operators.

It also removes the single redundant operator in the Localization
clause, because it didn't seem worth doing in a separate commit.

* include/bits/allocator.h (operator!=): Do not define for C++20.
* include/bits/locale_classes.h (operator!=): Likewise.
* include/bits/std_function.h (operator==(nullptr_t, const function&))
(operator!=(const function&, nullptr_t))
(operator!=(nullptr_t, const function&)): Likewise.
* include/ext/bitmap_allocator.h (operator!=): Likewise.
* include/ext/debug_allocator.h (operator!=): Likewise.
* include/ext/extptr_allocator.h (operator!=): Likewise.
* include/ext/malloc_allocator.h (operator!=): Likewise.
* include/ext/mt_allocator.h (operator!=): Likewise.
* include/ext/new_allocator.h (operator!=): Likewise.
* include/ext/pool_allocator.h (operator!=): Likewise.
* include/ext/throw_allocator.h (operator!=): Likewise.
* include/std/bitset (bitset::operator!=): Likewise.
* include/std/memory_resource (operator!=): Likewise.
* include/std/scoped_allocator (operator!=): Likewise.

libstdc++: Add spaceship operator to std::type_index

Another C++20 change from P1614R2, "The Mothership has Landed".

* include/std/typeindex (operator<=>): Define for C++20.
* testsuite/20_util/typeindex/comparison_operators_c++20.cc: New test.

Simplify recently introduced check to simplify_bound.

gcc/fortran/ChangeLog:

2020-04-15 Fritz Reese <foreese@gcc.gnu.org>
Linus Koenig <link@sig-st.de>

PR fortran/94192
* simplify.c (simplify_bound): Simplify condition for error check.

i386: Require OPTION_MASK_ISA_SSE2 for __builtin_ia32_movq128 [PR94603]

PR target/94603
* config/i386/i386-builtin.def (__builtin_ia32_movq128):
Require OPTION_MASK_ISA_SSE2.

testsuite/ChangeLog:

PR target/94603
* gcc.target/i386/pr94603.c: New test.

selftest: Work around GCC 4.2 PR33916 bug by optimizing the ctor [PR89494]

GCC 4.2 due to PR33916 miscompiles temp_dump_context ctor, because it doesn't
zero initialize the whole dump_context temporary on which it runs the static
get method and during destruction of the temporary an uninitialized pointer
is deleted.

More recent GCC versions properly zero initialize it and ideally optimize away
the construction/destruction of the temporary, as it isn't used for anything,
but there is no reason to create the temporary, static member functions can
be called without an associated object.

2020-04-15 Gustavo Romero <gromero@linux.ibm.com>

PR bootstrap/89494
* dumpfile.c (selftest::temp_dump_context::temp_dump_context):
Don't construct a dump_context temporary to call static method.

aarch64: Fix valid_src_p for use of uninitialized value

2020-04-15 Andrea Corallo <andrea.corallo@arm.com>

* config/aarch64/falkor-tag-collision-avoidance.c
(valid_src_p): Check for aarch64_address_info type before
accessing base field.

Arm: MVE: Add mve vec_duplicate pattern

This patch fixes an ICE we were seeing due to a missing vec_duplicate pattern.

gcc/ChangeLog:
2020-04-15  Andre Vieira  <andre.simoesdiasvieira@arm.com>

* config/arm/mve.md (mve_vec_duplicate<mode>): New pattern.
(V_sz_elem2): Remove unused mode attribute.

gcc/testsuite/ChangeLog:
2020-04-15  Andre Vieira <andre.simoesdiasvieira@arm.com>
            Srinath Parvathaneni <srinath.parvathaneni@arm.com>

* gcc.target/arm/mve/intrinsics/mve_vec_duplicate.c: New test.

[Arm] Disallow arm_movdi when targetting MVE

Without disabling this, the pattern can try and move DImode values
between floating point registers and general registers.
The constraints on this pattern can't handle that, and reload goes into
an infinite loop.

This was the cause of a testsuite failure in cde_v_1_mve.c, which is now
gone.

A DImode move for MVE now uses the `movdi_vfp` pattern, which is the same
pattern used for such a move when MVE is not available but the target has
TARGET_HARD_FLOAT.

Testing done:
    Bootstrapped and regtested on arm-none-linux-gnueabihf
    regtested on arm-none-eabi

gcc/ChangeLog:

2020-04-15  Matthew Malcomson  <matthew.malcomson@arm.com>

* config/arm/arm.md (arm_movdi): Disallow for MVE.

aarch64: Fix bootstrap with old binutils [PR93053]

As reported in the PR, GCC 10 (and also 9.3.1 but not 9.3.0) fails to build
when using older binutils which lack LSE support, because those instructions
are used in libgcc.
Thanks to Kyrylo's hint, the following patches (hopefully) allow it to build
even with older binutils by using .inst directive if LSE support isn't
available in the assembler.

2020-04-15 Jakub Jelinek <jakub@redhat.com>

PR target/93053
* configure.ac (LIBGCC_CHECK_AS_LSE): Add HAVE_AS_LSE checking.
* config/aarch64/lse.S: Include auto-target.h, if HAVE_AS_LSE
is not defined, use just .arch armv8-a.
(B, M, N, OPN): Define.
(COMMENT): New .macro.
(CAS, CASP, SWP, LDOP): Use .inst directive if HAVE_AS_LSE is not
defined. Otherwise, move the operands right after the glue? and
comment out operands where the macros are used.
* configure: Regenerated.
* config.in: Regenerated.

openmp: Reject requires directives not at file or namespace scope [PR94593]

This change started with a bugreport about a typo in one requires testcase
(diagnosed with -Wunknown-pragmas only), but following discussion lead to
noting that we do not diagnose restriction that requires directives in
C/C++ may only appear at file or namespace scope; and several our tests
violated that.

2020-04-15 Jakub Jelinek <jakub@redhat.com>

PR c/94593
* c-parser.c (c_parser_pragma) <case PRAGMA_OMP_REQUIRES>: Reject
requires directive when not at file scope.

* parser.c (cp_parser_pragma) <case PRAGMA_OMP_REQUIRES>: Reject
requires directive when not at file or namespace scope.

* c-c++-common/gomp/requires-1.c: Fix a typo, requries -> requires.
Move directives to file scope.
(i): Remove.
* c-c++-common/gomp/requires-2.c: Move directives to file scope.
(i, foo): Remove.
* c-c++-common/gomp/requires-4.c: Move directives to file scope.
* c-c++-common/gomp/atomic-19.c: Move requires directive to file scope.
* c-c++-common/gomp/atomic-20.c: Likewise.
* c-c++-common/gomp/atomic-21.c: Likewise.
* c-c++-common/gomp/atomic-22.c: Likewise.
* gcc.dg/gomp/requires-1.c: New test.
* g++.dg/gomp/requires-1.C: New test.
* g++.dg/gomp/requires-2.C: New test.
* g++.dg/gomp/atomic-18.C: Move requires directive to file scope.

middle-end/94539 - void * aliases every other pointer

This makes same_type_for_tbaa_p conservative in the same way
get_alias_set is about void * which we allow to alias all other
pointers.

2020-04-15 Richard Biener <rguenther@suse.de>

PR middle-end/94539
* tree-ssa-alias.c (same_type_for_tbaa): Defer to
alias_sets_conflict_p for pointers.

* gcc.dg/alias-14.c: Make dg-do run.

Daily bump.

xtensa: fix PR target/94584

Patterns zero_extendhisi2, zero_extendqisi2 and extendhisi2_internal can
load value from memory, but they don't treat volatile memory correctly.
Add %v1 before load instructions to emit 'memw' instruction when
-mserialize-volatile is in effect.

2020-04-14 Max Filippov <jcmvbkbc@gmail.com>
gcc/
* config/xtensa/xtensa.md (zero_extendhisi2, zero_extendqisi2)
(extendhisi2_internal): Add %v1 before the load instructions.

gcc/testsuite/
* gcc.target/xtensa/pr94584.c: New test.

Update gcc sv.po.

* sv.po: Update.

libstdc++: Fix constraints on std::compare_three_way

My "simplification" of std::compare_three_way's constraints in commit
f214ffb336d582a66149068a2a96b7fcf395b5de was incorrect, because
std::three_way_comparable_with imposes additional restrictions beyond
the <=> expression being valid.

* libsupc++/compare (compare_three_way): Fix constraint so that
BUILTIN-PTR-THREE-WAY does not require three_way_comparable_with.
* testsuite/18_support/comparisons/object/builtin-ptr-three-way.cc:
New test.

libstdc++: Add comparison operators to std::shared_ptr (PR 94562)

This also implements the proposed resolution to LWG issue 3247, so that
the ill-formed <=> expression with nullptr is not used.

PR libstdc++/94562
* include/bits/shared_ptr.h (operator<=>): Define for C++20.
* include/bits/shared_ptr_base.h (operator<=>): Likewise.
* include/bits/unique_ptr.h (operator<=>): Add inline specifier.
* testsuite/20_util/shared_ptr/comparison/cmp_c++20.cc: New test.
* testsuite/20_util/shared_ptr/comparison/less.cc: Do not expect
std::less<A*> to be used when comparing std::shared_ptr<A> objects in
C++20.

coroutines: Fix compile error with symmetric transfers [PR94359]

For symmetric transfers to work with C++20 coroutines, it is
currently necessary to tail call the callee coroutine from resume
method of the caller coroutine. The current codegen marks these
resume calls as "MUST_TAIL_CALL" to indicate that the tail call is
required for correctness.

Unfortunately, several targets have ABI constraints that prevent
an indirect tail-call, which results in the PRs compile error.

The change here tests the target sibcall hook for the resume
expression and only marks it as requiring a tail call if that's
supported.

This doesn't fix the underlying problem; that really a solution is
needed to allow the tail-calls (or equivalent) to take place - but
that will be deferred until next stage 1.

gcc/cp/ChangeLog:

2020-04-14 Iain Sandoe <iain@sandoe.co.uk>

PR c++/94359
* coroutines.cc (build_actor_fn): Check that the target can
support the resume tailcall before mandating it.

gcc/testsuite/ChangeLog:

2020-04-14 Iain Sandoe <iain@sandoe.co.uk>

PR c++/94359
* g++.dg/coroutines/torture/symmetric-transfer-00-basic.C:
Expect a run fail for targets without arbitrary indirect
tail-calls.

libstdc++: Fix order of entries in ChangeLog

Fix for PR/94542, do not make TLS refs PC-relative

For rs6000 target, it is not valid to make PC-relative
references to TLS symbols. So addr_to_insn_form() needs
to check if things are TLS before returning PC-rel forms.

2020-04-14 Aaron Sawdey <acsawdey@linux.ibm.com>

PR target/94542
* config/rs6000/rs6000.c (address_to_insn_form): Do not attempt to
use PC-relative addressing for TLS references.

c++: Add testcase for PR c++/93207

gcc/testsuite/ChangeLog:

PR c++/93207
* g++.dg/concepts/variadic5.C: New test.

c++: "'decltype_type' not supported" in diagnostic [PR85278]

This fixes a garbled concepts diagnostic by moving the handling of DECLTYPE_TYPE
from pp_cxx_type_specifier_seq to cxx_pretty_printer::simple_type_specifier, a
move which also seems to be more consistent with the language grammar.

This patch also fixes pretty printing of rvalue reference types via
cxx_pretty_printer::type_id, which eventually calls pp_c_pointer which currently
doesn't distinguish between lvalue and rvalue references.

gcc/c-family/ChangeLog:

PR c++/85278
* c-pretty-print.c (pp_c_pointer) <case REFERENCE_TYPE>: Print a double
ampersand if it's an rvalue reference type.

gcc/cp/ChangeLog:

PR c++/85278
* cxx-pretty-print.c (cxx_pretty_printer:simple_type_specifier)
<case DECLTYPE_TYPE>: Handle DECLTYPE_TYPE here instead of ...
(pp_cxx_type_specifier_seq) <case DECLTYPE_TYPE>: ... here.
(cxx_pretty_printer::direct_abstract_declarator) <case DECLTYPE_TYPE>:
New no-op case.

gcc/testsuite/ChangeLog:

PR c++/85278
* g++.dg/concepts/diagnostic9.C: New test.

ipa-sra: Fix treatment of internal functions (PR 94434)

IPA-SRA can segfault when processing a call to an internal function
because such calls do not have corresponding call graphs and should be
treated like memory accesses anyway, which what the patch below does.

The patch makes an attempt to differentiate between reads and writes,
although for things passed by value it does not make any difference.
It treats all arguments of functions denoted with internal_store_fn_p
as written to, even though in practice only some are, but for IPA-SRA
purposes, actions needed to be taken when processing a read are also
always performed when analyzing a write, so the code is just slightly
pessimistic.  But not as pessimistic as bailing out on any internal
call immediately.

I have LTO bootstrapped and tested the patch on x86_64-linux and
normally bootstrapped and tested it on aarch64-linux, although one
which is not SVE capable.  I would appreciate testing on such machine
too - as well as a small testcase that would follow all relevant
conventions in gcc.target/aarch64/sve.

2020-04-14  Martin Jambor  <mjambor@suse.cz>

PR ipa/94434
* ipa-sra.c: Include internal-fn.h.
(enum isra_scan_context): Update comment.
(scan_function): Treat calls to internal_functions like loads or stores.

c++: Stray RESULT_DECLs in result of constexpr call [PR94034]

When evaluating the initializer of 'a' in the following example

  struct A {
    A() = default; A(const A&);
    A *p = this;
  };
  constexpr A foo() { return {}; }
  constexpr A a = foo();

the PLACEHOLDER_EXPR for 'this' in the aggregate initializer returned by foo
gets resolved to the RESULT_DECL of foo.  But due to guaranteed RVO, the 'this'
should really be resolved to '&a'.

Fixing this properly by immediately resolving 'this' and PLACEHOLDER_EXPRs to
the ultimate object under construction would in general mean that we would no
longer be able to cache constexpr calls for which RVO possibly applies, because
the result of the call may now depend on the ultimate object under construction.

So as a mostly correct stopgap solution that retains cachability of RVO'd
constexpr calls, this patch fixes this issue by rewriting all occurrences of the
RESULT_DECL in the result of a constexpr function call with the current object
under construction, after the call returns.  This means the 'this' pointer
during construction of the temporary will still point to the temporary object
instead of the ultimate object, but besides that this approach seems
functionally equivalent to the proper approach.

gcc/cp/ChangeLog:

PR c++/94034
* constexpr.c (replace_result_decl_data): New struct.
(replace_result_decl_data_r): New function.
(replace_result_decl): New function.
(cxx_eval_call_expression): Use it.
* tree.c (build_aggr_init_expr): Set the location of the AGGR_INIT_EXPR
to that of its initializer.

gcc/testsuite/ChangeLog:

PR c++/94034
* g++.dg/cpp0x/constexpr-empty15.C: New test.
* g++.dg/cpp1y/constexpr-nsdmi6a.C: New test.
* g++.dg/cpp1y/constexpr-nsdmi6b.C: New test.
* g++.dg/cpp1y/constexpr-nsdmi7a.C: New test.
* g++.dg/cpp1y/constexpr-nsdmi7b.C: New test.

testsuite: Add testcase for already fixed PR [PR94573]

2020-04-14 Jakub Jelinek <jakub@redhat.com>

PR tree-optimization/94573
* gcc.dg/store_merging_30.c: New test.

PR tree-optimization/94574 - aarch64: ICE during GIMPLE pass:ccp

In this PR the testcase ICEs because a BIT_INSERT_EXPR whose replaced bits are
not fully inside the container is generated. A size check is added to avoid
this kind of ICE.

gcc/ChangeLog:

PR tree-optimization/94574
* tree-ssa.c (non_rewritable_lvalue_p): Add size check when analyzing
whether a vector-insert is rewritable using a BIT_INSERT_EXPR.

gcc/testsuite/ChangeLog:

PR tree-optimization/94574
* gcc.dg/pr94574.c: New test.

i386: Remove mode size check in ix86_get_ssemov

Even though ix86_hard_regno_mode_ok doesn't allow xmm16-xmm31 nor
ymm16-ymm31 in 128/256 bit modes when AVX512VL is disabled, LRA can
still generate reg to reg moves with xmm16-xmm31 and ymm16-ymm31 in
128/256 bit modes. Remove mode size check in ix86_get_ssemov.

gcc/

PR target/94561
* config/i386/i386.c (ix86_get_ssemov): Remove mode size check.

gcc/testsuite/

PR target/94561
* gcc.target/i386/pr94561.c: New test.

Add myself as callgraph (IPA) reviewer

2020-04-14 Martin Jambor <mjambor@suse.cz>

* MAINTAINERS (Reviewers): Add myself as callgraph (IPA) reviewer.

[Fortran] Fix name conflict check for use-assoc (PR 92736)

* module.c (gfc_match_use): Fix name-conflict check for use-associating
the same symbol again in a submodule.

* gfortran.dg/use_rename_10.f90: New.
* gfortran.dg/use_rename_11.f90: New.

Fix PR 94270 by not warning about artifical dummy arguments.

2020-04-14 Thomas Koenig <tkoenig@gcc.gnu.org>

PR fortran/94270
* interface.c (gfc_get_formal_from_actual_arglist): Always
set artificial attribute for symbols.
* trans-decl.c (generate_local_decl): Do not warn if the
symbol is artifical.

2020-04-14 Thomas Koenig <tkoenig@gcc.gnu.org>

PR fortran/94270
* gfortran.dg/warn_unused_dummy_argument_6.f90: New test.

Add me as callgraph (IPA) reviewer.

ChangeLog:

2020-04-14 Martin Liska <mliska@suse.cz>

* MAINTAINERS: Add me as callgraph (IPA) reviewer.

libstdc++: Make comparison category comparisons noexcept (PR 94565)

PR libstdc++/94565
* libsupc++/compare (__unspec): Add noexcept-specifier to constructor.
* testsuite/18_support/comparisons/categories/94565.cc: New test.

c++: Improve redeclared parameter name diagnostic [PR94588]

While reviewing [basic.scope.param] I noticed we don't show the location
of the previous declaration when giving an error about "A parameter name
shall not be redeclared in the outermost block of the function definition".

PR c++/94588
* name-lookup.c (check_local_shadow): Add an inform call.

* g++.dg/diagnostic/redeclaration-1.C: Add dg-message.

Daily bump.

Update and correct documentation of -Wall and -Wrestrict.

gcc/ChangeLog:
* doc/extend.texi (-Wall): Mention -Wformat-overflow and
-Wformat-truncation. Move -Wzero-length-bounds last.
(-Wrestrict): Document positive form of option enabled by -Wall.

PR c/92326 - wrong bound in zero-length array diagnostics

gcc/c-family/ChangeLog:

PR c/92326
* c-pretty-print.c (c_pretty_printer::direct_abstract_declarator): Avoid
printing array bound for flexible array members.

gcc/testsuite/ChangeLog:

PR c/92326
* c-c++-common/Warray-bounds-8.c: New test.
* gcc.dg/Warray-bounds-46.c: Adjust expected format of flexible array
memebrs in diagnostics.
* gcc.dg/Warray-bounds-49.c: Same.

c++: Infinite diagnostic loop with decltype([]{}) [PR94521]

We are hitting a recursive loop when printing the signature of a function
containing a decltype([]{}) type.  The loop is

  dump_function_decl -> dump_substitution
     -> dump_template_bindings
     -> dump_type
     -> dump_aggr_type
     -> dump_scope -> dump_function_decl

and we loop because dump_template_bindings wants to print the resolved type of
decltype([]{}) (i.e. just a lambda type), so it calls dump_aggr_type, which
wants to print the function scope of the lambda type.  But the function scope of
the lambda type is the function which we're in the middle of printing.

This patch breaks the loop by passing TFF_NO_FUNCTION_ARGUMENTS to
dump_function_decl from dump_scope, so that we avoid recursing into
dump_substitution and ultimately looping.

This also means we no longer emit the "[with ...]" clause when printing a
function template scope, and we instead just emit its template argument list in
a more natural way, e.g. instead of
    foo(int, char) [with T=bool]::x
we would now print
    foo<bool>::x
which seems like an improvement on its own.

The full signature of the function 'spam' in the below testcase is now
  void spam(decltype (<lambda>)*) [with T = int; decltype (<lambda>) = spam<int>::<lambda()>]

gcc/cp/ChangeLog:

PR c++/94521
* error.c (dump_scope): Pass TFF_NO_FUNCTION_ARGUMENTS to
dump_function_decl when printing a function template instantiation as a
scope.

gcc/testsuite/ChangeLog:

PR c++/94521
* g++.dg/cpp2a/lambda-uneval12.C: New test.

c++: More self-modifying constexpr init [PR94470]

In this PR we're incorrectly rejecting a self-modifying constexpr initializer as
a consequence of the fix for PR78572.

It looks like however that the fix for PR78572 is obsoleted by the fix for
PR89336: the testcase from the former PR successfully compiles even with its fix
reverted.

But then further testing showed that the analogous testcase of PR78572 where the
array has an aggregate element type is still problematic (i.e. we ICE) even with
the fix for PR78572 applied.  The reason is that in cxx_eval_bare_aggregate we
attach a constructor_elt of aggregate type always to the end of the new
CONSTRUCTOR, but that's not necessarily correct if the CONSTRUCTOR is
self-modifying.  We should instead be using get_or_insert_ctor_field to insert
the constructor_elt in the right place.

So this patch reverts the PR78572 fix and makes the appropriate changes to
cxx_eval_bare_aggregate.  This fixes PR94470, and we now are also able to fully
reduce the initializers of 'arr' and 'arr2' in the new test array57.C to
constant initializers.

gcc/cp/ChangeLog:

PR c++/94470
* constexpr.c (get_or_insert_ctor_field): Set default value of parameter
'pos_hint' to -1.
(cxx_eval_bare_aggregate): Use get_or_insert_ctor_field instead of
assuming the the next index belongs at the end of the new CONSTRUCTOR.
(cxx_eval_store_expression): Revert PR c++/78572 fix.

gcc/testsuite/ChangeLog:

PR c++/94470
* g++.dg/cpp1y/constexpr-nsdmi8.C: New test.
* g++.dg/cpp1y/constexpr-nsdmi9.C: New test.
* g++.dg/init/array57.C: New test.

coroutines: Rename the coroutines cpp builtin.

The current standard draft (n4861) amends the cpp builtin for
coroutines to '__cpp_impl_coroutine', no other change.

gcc/c-family/ChangeLog:

2020-04-13  Iain Sandoe  <iain@sandoe.co.uk>

* c-cppbuiltin.c (c_cpp_builtins): Update coroutines builtin
define, per n4861.

gcc/testsuite/ChangeLog:

2020-04-13  Iain Sandoe  <iain@sandoe.co.uk>

* g++.dg/coroutines/coro-pre-proc.C: Update coroutines builtin
define, per n4861.
* g++.dg/coroutines/coro.h: Likewise.

libstdc++-v3/ChangeLog:

2020-04-13  Iain Sandoe  <iain@sandoe.co.uk>

* include/std/coroutine: Update coroutines builtin define,
per n4861.

Minor documentation fix

* doc/extend.texi: Add realloc to list of built-in functions
are recognized by the compiler.

Darwin, testsuite: Fix darwin-version-1.c fails with XCode 11.4.

From XCode 11.4 on 10.14/15 use of 10.6 and 10.7 is deprecated.
The tools issue diagnostics if -mmacosx-version-min= < 10.8

Adjust the testcase to avoid that usage on 10.14, 10.15 for now.

gcc/testsuite/ChangeLog:

2020-04-13 Iain Sandoe <iain@sandoe.co.uk>

* gcc.dg/darwin-version-1.c: Use -mmacosx-version-min= 10.8
for system versions 10.14 and 10.15.

Commit test case for PR 87644, which has fixed itself somehow.

2020-04-13 Thomas Koenig <tkoenig@gcc.gnu.org>

PR fortran/87644
* gfortran.dg/variable_parameter.f90: New test.

ICE on wrong code [PR94192].

The idea is not have another resolution of a pointer if an error has
occurred previously.

2020-04-13 Linus Koenig <link@sig-st.de>

PR fortran/94192
* resolve.c (resolve_fl_var_and_proc): Set flag "error" to 1 if
pointer is found to not have an assumed rank or a deferred shape.
* simplify.c (simplify_bound): If an error has been issued for a
given pointer, one should not attempt to find its bounds.

2020-04-13 Linus Koenig <link@sig-st.de>

PR fortran/94192
* gfortran.dg/bound_resolve_after_error_1.f90: New test.

c++: lambdas with internal linkage are different to no-linkage [PR94426]

My fix for 94147 was confusing no-linkage with internal linkage, at
the language level.  That's wrong. (the std is confusing here, because
it describes linkage of names (which is wrong), and lambdas have no
names)

Lambdas with extra-scope, have linkage.  However, at the
implementation-level that linkage is at least as restricted as the
linkage of the extra-scope decl.

Further, when instantiating a variable initialized by a lambda, we
must determine the visibility of the variable itself, before
instantiating its initializer.  If the template arguments are internal
(or no-linkage), the variable will have internal linkage, regardless
of the linkage of the template it is instantiated from.  We need to
know that before instantiating the lambda, so we can restrict its
linkage correctly.

* decl2.c (determine_visibility): A lambda's visibility is
affected by its extra scope.
* pt.c (instantiate_decl): Determine var's visibility before
instantiating its initializer.
* tree.c (no_linkage_check): Revert code looking at visibility of
lambda's extra scope.
` gcc/cp/
* g++.dg/cpp0x/lambda/pr94426-[12].C: New.
* g++.dg/abi/lambda-vis.C: Drop a warning.
* g++.dg/cpp0x/lambda/lambda-mangle.C: Lambda visibility on
variable changes.
* g++.dg/opt/dump1.C: Drop warnings of no import.

x86: Restore the frame pointer in word_mode

We must restore the frame pointer in word_mode for eh_return epilogues
since the upper 32 bits of RBP register can have any values.

Tested on Linux/x32 and Linux/x86-64.

PR target/94556
* config/i386/i386.c (ix86_expand_epilogue): Restore the frame
pointer in word_mode for eh_return epilogues.

MSP430: Dont add offsets to addresses when emitting asm for post_inc

Some insns, which operate on SImode operands, output assembler template
that comprise of multiple instructions using HImode operands. To access
the high word of an SImode operand, an operand selector '%H' is used to
offset the operand value by a constant amount.

When one of these HImode operands is a memory reference to a post_inc,
the address does not need to be offset, since the preceding instruction
has already offset the address to the correct value.

This fixes an ICE in change_address_1, at emit-rtl.c:2318 for
gcc.c-torture/execute/pr20527-1.c in the "-mlarge -O2 -flto
-fuse-linker-plugin -fno-fat-lto-objects" configuration.

This test generated the following insn, and the attempt to output the
high part of the post_inc address caused the ICE.
(set (reg:SI 6 R6)
     (minus:SI (reg:SI 6 R6)
               (mem:SI (post_inc:PSI (reg:PSI 10 R10)) {subsi3}

gcc/ChangeLog:

2020-04-13  Jozef Lawrynowicz  <jozef.l@mittosystems.com>

* config/msp430/msp430.c (msp430_print_operand): Don't add offsets to
memory references in %B, %C and %D operand selectors when the inner
operand is a post increment address.

MSP430: Fix memory offsets used by %C and %D asm output operand modifiers

The %C and %D operand modifiers are supposed to access the 3rd and 4th
words of a 64-bit value, so for memory references they need to offset
the given address by 4 and 6 bytes respectively.

gcc/ChangeLog:

2020-04-13 Jozef Lawrynowicz <jozef.l@mittosystems.com>

* config/msp430/msp430.c (msp430_print_operand): Offset a %C memory
reference by 4 bytes, and %D memory reference by 6 bytes.

gcc/testsuite/ChangeLog:

2020-04-13 Jozef Lawrynowicz <jozef.l@mittosystems.com>

* gcc.target/msp430/operand-modifiers.c: New test.

d: Merge update dmd 799066f49

Removes the implementation of __traits(argTypes), which only supported
x86_64 targets.  The only use of this trait is an unused va_arg()
function, this has been removed as well.

Reviewed-on: https://github.com/dlang/dmd/pull/11022

gcc/d/ChangeLog:

2020-04-13  Iain Buclaw  <ibuclaw@gdcproject.org>

* Make-lang.in (D_FRONTEND_OBJS): Remove d/argtypes.o.
* d-target.cc (Target::toArgTypes): New function.

libphobos/ChangeLog:

2020-04-13  Iain Buclaw  <ibuclaw@gdcproject.org>

* libdruntime/core/stdc/stdarg.d: Remove run-time va_list template.

Rename 'libgomp.oacc-c-c++-common/static-dynamic-lifetimes-*' to 'libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-*' [PR92843]

Fix-up for commit be9862dd96945772ae0692bc95b37ec6dbcabda0 "Test cases for
mixed structured/dynamic data lifetimes with OpenACC [PR92843]": it's
"structured", not "static" data lifetimes/reference counters.

libgomp/
PR libgomp/92843
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-1-lib.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-1-lib.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-1.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-1.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-2-lib.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-2-lib.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-2.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-2.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-3-lib.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-3-lib.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-3.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-3.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-4-lib.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-4-lib.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-4.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-4.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-5-lib.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-5-lib.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-5.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-5.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-6-lib.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-6-lib.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-6.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-6.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-7-lib.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-7-lib.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-7.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-7.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-8-lib.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-8-lib.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-8.c::
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-8.c:
... this.

Daily bump.

Added a test case from a PR that was fixed by something else.

2020-04-12 Thomas Koenig <tkoenig@gcc.gnu.org>

PR fortran/94091
* gfortran.dg/char_length_22.f90: New test.

Committed ChangeLog entry.

Darwin, testsuite: Adjust indirect thunk tests for default flags.

Darwin mandates an indirection for variables in the commmon
section.  Since the change to -fno-common, variables in some
of the thunk tests are now in the .data section where they
may be accessed directly.  Remove the indirections from the
scan-assembler matches.

gcc/testsuite/ChangeLog:

2020-04-12  Iain Sandoe  <iain@sandoe.co.uk>

* gcc.target/i386/indirect-thunk-1.c: Adjust for fno-common
change, removing indirections for vars in .data.
* gcc.target/i386/indirect-thunk-2.c: Likewise.
* gcc.target/i386/indirect-thunk-3.c: Likewise.
* gcc.target/i386/indirect-thunk-4.c: Likewise.
* gcc.target/i386/indirect-thunk-attr-1.c: Likewise.
* gcc.target/i386/indirect-thunk-attr-2.c: Likewise.
* gcc.target/i386/indirect-thunk-attr-3.c: Likewise.
* gcc.target/i386/indirect-thunk-attr-4.c: Likewise.
* gcc.target/i386/indirect-thunk-attr-5.c: Likewise.
* gcc.target/i386/indirect-thunk-attr-6.c: Likewise.
* gcc.target/i386/indirect-thunk-extern-1.c: Likewise.
* gcc.target/i386/indirect-thunk-extern-2.c: Likewise.
* gcc.target/i386/indirect-thunk-extern-3.c: Likewise.
* gcc.target/i386/indirect-thunk-extern-4.c: Likewise.
* gcc.target/i386/indirect-thunk-inline-1.c: Likewise.
* gcc.target/i386/indirect-thunk-inline-2.c: Likewise.
* gcc.target/i386/indirect-thunk-inline-3.c: Likewise.
* gcc.target/i386/indirect-thunk-inline-4.c: Likewise.

Daily bump.

c++: Add test for PR 86327.

Fixed by r264171.

PR c++/86327
* g++.dg/cpp1y/constexpr-return5.C: New test.

i386: Fix REDUC_SSE_SMINMAX_MODE mode conditions.

V4SI, V8HI and V16QI modes of redux_<code>_scal_<mode> expander
expand with SSE2 instructions (PSRLDQ and PCMPGTx) so use
TARGET_SSE2 as relevant mode iterator codition.

PR target/94494
* config/i386/sse.md (REDUC_SSE_SMINMAX_MODE): Use TARGET_SSE2
condition for V4SI, V8HI and V16QI modes.

testsuite/ChangeLog:

PR target/94494
* gcc.target/i386/pr94494.c: New test.

testsuite: Fix up pr94482.c testcase [PR94482]

The test FAILs on powerpc64-linux with -m32 due to psabi warnings.
Furthermore, the test needs really -msse2 to reproduce on x86 -m32 at -O2.

2020-04-11 Jakub Jelinek <jakub@redhat.com>

PR tree-optimization/94482
* gcc.dg/torture/pr94482.c: Add -Wno-psabi -w. Don't add -msse
and sse_runtime effective target on x86, instead only add -msse2
if target is sse2_runtime.

cselib: Mark the cselib_record_sp_cfa_base_equiv VALUE as preserved [PR94551]

Sometimes the cselib_record_sp_cfa_base_equiv makes it into the var-tracking
used VALUEs and needs to be preserved.

2020-04-11 Jakub Jelinek <jakub@redhat.com>

PR debug/94495
PR target/94551
* cselib.c (cselib_record_sp_cfa_base_equiv): Set PRESERVED_VALUE_P on
val->val_rtx.

Daily bump.

Correct PR numbers in the last Changelog.

I mistyped the PR number in the actual fix commit
r10-7682-g0666767eb4cc864f00ba34d97b9d58f8dc650bba.

coroutines: Revise await expansions [PR94528]

The expansions for await expressions were specific to particular
cases, this revises it to be more generic.

a: Revise co_await statement walkers.

We want to process the co_awaits one statement at a time.
We also want to be able to determine the insertion points for
new bind scopes needed to cater for temporaries that are
captured by reference and have lifetimes that need extension
to the end of the full expression.  Likewise, the handling of
captured references in the evaluation of conditions might
result in the need to make a frame copy.

This reorganises the statement walking code to make it easier to
extend for these purposes.

b: Factor reference-captured temp code.

We want to be able to use the code that writes a new bind expr
with vars (and their initializers) from several places, so split
that out of the maybe_promote_captured_temps() function into a
new replace_statement_captures ().  Update some comments.

c: Generalize await statement expansion.

This revises the expansion to avoid the need to expand conditionally
on the tree type.  It resolves PR 94528.

gcc/cp/ChangeLog:

2020-04-10  Iain Sandoe  <iain@sandoe.co.uk>

PR c++/94538
* coroutines.cc (co_await_expander): Remove.
(expand_one_await_expression): New.
(process_one_statement): New.
(await_statement_expander): New.
(build_actor_fn): Revise to use per-statement expander.
(struct susp_frame_data): Reorder and comment.
(register_awaits): Factor code.
(replace_statement_captures): New, factored from...
(maybe_promote_captured_temps):.. here.
(await_statement_walker): Revise to process per statement.
(morph_fn_to_coro): Use revised susp_frame_data layout.

gcc/testsuite/ChangeLog:

2020-04-10  Iain Sandoe  <iain@sandoe.co.uk>

PR c++/94538
* g++.dg/coroutines/pr94528.C: New test.

c++: make __is_constructible work with paren-init of aggrs [PR94149]

In C++20 this is well-formed:

  using T = int[2];
  T t(1, 2);

which means that std::is_constructible_v<int[2], int, int> should be true.
But constructible_expr immediately returned the error_mark_node when it
saw a list with more than one element.  To give accurate results in
C++20, we have to try initializing the aggregate from a parenthesized list of
values.

To not repeat the same mistake as in c++/93790, if there's only one
element, I'm trying {} only when () didn't succeed.  is_constructible5.C
verifies this.

In paren-init24.C std::is_nothrow_constructible_v doesn't work due to
error: invalid 'static_cast' from type 'int' to type 'int [1]'
and
error: functional cast to array type 'int [2]'

This needs to be fixed in libstdc++.

PR c++/94149
* method.c (constructible_expr): In C++20, try using parenthesized
initialization of aggregates to determine the result of
__is_constructible.

* g++.dg/cpp2a/paren-init24.C: New test.
* g++.dg/cpp2a/paren-init25.C: New test.
* g++.dg/ext/is_constructible5.C: New test.

Fix typo in gfortran.dg/asynchronous_5.f03 from last commit.

2020-04-10 Fritz Reese <foreese@gcc.gnu.org>

* gfortran.dg/asynchronous_5.f03: Fix typo in testcase and add
IMPLICIT NONE.

Fix UNRESOLVED testcase gfortran.dg/asynchronous_5.f03.

gcc/testsuite/ChangeLog:

2020-04-10 Fritz Reese <foreese@gcc.gnu.org>

* gfortran.dg/asynchronous_5.f03: Add -fdump-tree-original and fix
patterns for scan-tree-dump.

Test cases for mixed structured/dynamic data lifetimes with OpenACC [PR92843]

libgomp/
PR libgomp/92843
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-1-lib.c:
New file.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-1.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-2-lib.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-2.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-3-lib.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-3.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-4-lib.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-4.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-5-lib.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-5.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-6-lib.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-6.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-7-lib.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-7.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-8-lib.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-8.c:
Likewise.

Add 'dg-do run' to 'libgomp.fortran/target-enter-data-1.f90'

Fix-up for commit 689418b97e5eb6a221871a2439bca3e6283ac579 "libgomp – fix
handling of 'target enter data'".

libgomp/
* testsuite/libgomp.fortran/target-enter-data-1.f90: Add 'dg-do
run'.

Handle 'omp declare target' attribute set for both OpenACC and OpenMP 'target' [PR89433, PR93465]

... which as of PR89433 commit b48f44bf77a39fefc238a16cf1225c6464c82406 causes
an ICE. Not sure if this is actually supposed to be valid or invalid code.
Until the interactions between OpenACC and OpenMP 'target' get defined
properly, make this a compile-time error.

gcc/
PR middle-end/89433
PR middle-end/93465
* omp-general.c (oacc_verify_routine_clauses): Diagnose if
"#pragma omp declare target" has also been applied.
gcc/testsuite/
PR middle-end/89433
PR middle-end/93465
* c-c++-common/goacc-gomp/pr93465-1.c: New file.

libphobos: Use libdruntime as a convenience library for libphobos.

As a prerequesite for PR94304, it becomes easier to manage selectively
compiling sublibraries when there's only one library to link to.

So a druntime convenience library is built to be part of phobos, however
separate druntime library is still built and installed, to allow linking
only to the core runtime explicitly, rather than pulling in the entire
standard library with it.

The gdc driver no longer generates an '-lgdruntime' option, and the
inclusion of the libdruntime library path has been removed from the
testsuite.

gcc/d/ChangeLog:

* d-spec.cc (LIBDRUNTIME): Remove.
(LIBDRUNTIME_PROFILE): Remove.
(lang_specific_driver): Don't link in libgdruntime.

gcc/testsuite/ChangeLog:

* lib/gdc.exp (gdc_link_flags): Remove libdruntime library path.

libphobos/ChangeLog:

* d_rules.am (libdgruntime_la_LINK): Move to libdruntime/Makefile.am.
(libgphobos_la_LINK): Move to src/Makefile.am
* libdruntime/Makefile.am: Add libgdruntime_convenience library.
* libdruntime/Makefile.in: Regenerate.
* src/Makefile.am (libgphobos_la_LIBADD): Add libgdruntime_convenience
library.
(libgphobos_la_DEPENDENCIES): Likewise.
* src/Makefile.in: Regenerate.
* testsuite/lib/libphobos.exp: Remove libdruntime library paths.
* testsuite/testsuite_flags.in: Likewise.

Simplify co_await_expander.

gcc/cp
2020-04-10  Bin Cheng  <bin.cheng@linux.alibaba.com>

    * coroutines.cc (co_await_expander): Simplify.

gcc/testsuite
2020-04-10  Bin Cheng  <bin.cheng@linux.alibaba.com>

    * g++.dg/coroutines/co-await-syntax-10.C: New test.
    * g++.dg/coroutines/co-await-syntax-11.C: New test.

libgo: update to final 1.14.2 release

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/227551

compiler: look up composite literal keys in the global namespace

A composite literal key may not have a global definition, so
Gogo::define_global_names may not see it. In order to correctly
handle the case in which a predeclared identifier is used as a
composite literal key, do an explicit check of the global namespace.

Test case is https://golang.org/cl/227783.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/227784

Daily bump.

PR fortran/87923 -- fix ICE when resolving I/O tags and simplify io.c

2020-04-06  Fritz Reese  <foreese@gcc.gnu.org>

This patch reorganizes I/O checking code. Checks which were done in the
matching phase which do not affect the match result are moved to the
resolution phase. Checks which were duplicated in both the matching phase
and resolution phase have been reduced to one check in the resolution phase.

Another section of code which used a global async_io_dt flag to check for
and assign the asynchronous attribute to variables used in asynchronous I/O
has been simplified.

Furthermore, this patch improves error reporting and expands test coverage
of I/O tags:

- "TAG must be an initialization expression" reported by io.c
   (check_io_constraints) is replaced with an error from expr.c
   (gfc_reduce_init_expr) indicating _why_ the expression is not a valid
   initialization expression.

- Several distinct error messages regarding the check for scalar
   + character + default kind have been unified to one message reported by
   resolve_tag or check_*_constraints.

gcc/fortran/ChangeLog:

2020-04-09  Fritz Reese  <foreese@gcc.gnu.org>

PR fortran/87923
* gfortran.h (gfc_resolve_open, gfc_resolve_close): Add
locus parameter.
(gfc_resolve_dt): Add code parameter.
* io.c (async_io_dt, check_char_variable, is_char_type): Removed.
(resolve_tag_format): Add locus to error message regarding
zero-sized array in FORMAT tag.
(check_open_constraints, check_close_constraints): New functions
called at resolution time.
(gfc_match_open, gfc_match_close, match_io): Move checks which don't
affect the match result to new functions check_open_constraints,
check_close_constraints, check_io_constraints.
(gfc_resolve_open, gfc_resolve_close): Call new functions
check_open_constraints, check_close_constraints after all tags have
been independently resolved.  Remove duplicate constraints which are
already verified by resolve_tag. Explicitly pass locus to all error
reports.
(compare_to_allowed_values): Add locus parameter and provide
explicit locus all error reports.
(match_open_element, match_close_element, match_file_element,
match_dt_element, match_inquire_element): Remove redundant special
cases for ASYNCHRONOUS and IOMSG tags.
(gfc_resolve_dt): Remove redundant special case for format
expression.  Call check_io_constraints, forwarding an I/O list as
the io_code parameter if present.
(check_io_constraints): Change return type to bool. Pass explicit
locus to error reports. Move generic checks after tag-specific
checks, since errors are no longer buffered.  Move simplification of
format string to match_io.  Remove redundant checks which are
verified by resolve_tag.  Remove usage of async_io_dt flag and
explicitly mark symbols used in asynchronous I/O with the
asynchronous attribute.
* resolve.c (resolve_transfer, resolve_fl_namelist): Remove checks
for async_io_dt flag. This is now done in io.c
(check_io_constraints).
(gfc_resolve_code): Pass code locus to gfc_resolve_open,
gfc_resolve_close, gfc_resolve_dt.

gcc/testsuite/ChangeLog:

2020-04-09  Fritz Reese  <foreese@gcc.gnu.org>

PR fortran/87923
* gfortran.dg/f2003_io_8.f03: Fix expected error messages.
* gfortran.dg/io_constraints_8.f90: Likewise.
* gfortran.dg/iomsg_2.f90: Likewise.
* gfortran.dg/pr66725.f90: Likewise.
* gfortran.dg/pr88205.f90: Likewise.
* gfortran.dg/write_check4.f90: Likewise.
* gfortran.dg/asynchronous_5.f03: New test.
* gfortran.dg/io_constraints_15.f90: Likewise.
* gfortran.dg/io_constraints_16.f90: Likewise.
* gfortran.dg/io_constraints_17.f90: Likewise.
* gfortran.dg/io_constraints_18.f90: Likewise.
* gfortran.dg/io_tags_1.f90: Likewise.
* gfortran.dg/io_tags_10.f90: Likewise.
* gfortran.dg/io_tags_2.f90: Likewise.
* gfortran.dg/io_tags_3.f90: Likewise.
* gfortran.dg/io_tags_4.f90: Likewise.
* gfortran.dg/io_tags_5.f90: Likewise.
* gfortran.dg/io_tags_6.f90: Likewise.
* gfortran.dg/io_tags_7.f90: Likewise.
* gfortran.dg/io_tags_8.f90: Likewise.
* gfortran.dg/io_tags_9.f90: Likewise.
* gfortran.dg/write_check5.f90: Likewise.

c++: constexpr static data member instantiation [PR94523]

Here due to my recent change to store_init_value we were expanding the
initializer of aw knowing that we were initializing aw.  When
cxx_eval_call_expression finished the constructor, it wanted to look up the
value of aw to set TREE_READONLY on it, but we haven't set DECL_INITIAL yet,
so decl_constant_value tried to instantiate the initializer again.  And
infinite recursion.  Stopped by optimizing the case of asking for the value
of ctx->object, which is ctx->value.  It also would have worked to look in
the values hash table, so let's move that up before decl_constant_value as
well.

gcc/cp/ChangeLog
2020-04-09  Jason Merrill  <jason@redhat.com>

PR c++/94523
* constexpr.c (cxx_eval_constant_expression) [VAR_DECL]: Look at
ctx->object and ctx->global->values first.

libstdc++: Implement LWG 3324 for [cmp.alg] function objects (LWG 3324)

LWG 3324 changed the [cmp.alg] types to use std::compare_three_way
instead of the <=> operator, but we were still using the old
specification. In order to make the existing tests pass the N::X type
needs to be equality comparable, so that three_way_comparable is
satisfied and compare_three_way can be used.

As part of this change I noticed that the compare_three_way call
operator was unconditionally noexcept, which is incorrect.

* libsupc++/compare (compare_three_way): Fix noexcept-specifier.
(strong_order, weak_order, partial_order): Replace uses of <=> with
compare_three_way function object (LWG 3324).
* testsuite/18_support/comparisons/algorithms/partial_order.cc: Add
equality operator so that X satisfies three_way_comparable.
* testsuite/18_support/comparisons/algorithms/strong_order.cc:
Likewise.
* testsuite/18_support/comparisons/algorithms/weak_order.cc: Likewise.

libstdc++: Add comparison operators to std::unique_ptr

Some more C++20 changes from P1614R2, "The Mothership has Landed".

This includes the proposed resolution for LWG 3426 to fix the three-way
comparison with nullptr_t.

The existing tests for unique_ptr comparisons don't actually check the
results, only that the expressions compile and are convertible to bool.
This also adds a test for the results of those comparisons for C++11 and
up.

* include/bits/unique_ptr.h (operator<=>): Define for C++20.
* testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error line.
* testsuite/20_util/default_delete/void_neg.cc: Likewise.
* testsuite/20_util/unique_ptr/comparison/compare.cc: New test.
* testsuite/20_util/unique_ptr/comparison/compare_c++20.cc: New test.

MSP430: Indiciate that the epilogue_helper insn does not fallthru

This fixes an ICE in rtl_verify_fallthru, at cfgrtl.c:2970
gcc.c-torture/execute/20071210-1.c for -mcpu=msp430 at -O2
and above.

The epilogue_helper insn was treated as a regular insn which will
fallthru, so when a barrier is emitted after it, RTL verification failed
as rtl_verify_fallthru.

gcc/ChangeLog:

2020-04-09 Jozef Lawrynowicz <jozef.l@mittosystems.com>

* config/msp430/msp430.c (msp430_expand_epilogue): Use emit_jump_insn
when to emit the epilogue_helper insn.
* config/msp430/msp430.md (epilogue_helper): Add a return insn to the
RTL pattern.

cselib, var-tracking: Improve debug info after the cselib sp tracking changes [PR94495]

On the https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94495#c5
testcase GCC emits worse debug info after the PR92264 cselib.c
changes.
The difference at -O2 -g -dA in the assembly is (when ignoring debug info):
        # DEBUG g => [argp]
        # DEBUG k => [argp+0x20]
        # DEBUG j => [argp+0x18]
        # DEBUG a => di
        # DEBUG b => si
        # DEBUG c => dx
        # DEBUG d => cx
        # DEBUG h => [argp+0x8]
        # DEBUG e => r8
        # DEBUG i => [argp+0x10]
        # DEBUG f => r9
...
.LVL4:
+       # DEBUG h => [sp+0x10]
+       # DEBUG i => [sp+0x18]
+       # DEBUG j => [sp+0x20]
+       # DEBUG k => [sp+0x28]
        # DEBUG c => entry_value
# SUCC: EXIT [always]  count:1073741824 (estimated locally)
        ret
.LVL5:
+       # DEBUG k => [argp+0x20]
        # DEBUG a => bx
        # DEBUG b => si
        # DEBUG c => dx
        # DEBUG d => cx
        # DEBUG e => r8
        # DEBUG f => r9
+       # DEBUG h => [argp+0x8]
+       # DEBUG i => [argp+0x10]
+       # DEBUG j => [argp+0x18]
This means that before the changes, h, i, j, k could be all expressed
in DW_AT_location directly with DW_OP_fbreg <some_offset>, but now we need
to use a location list, where in the first part of the function and last
part of the function (everything except the ret instruction) we use that
DW_OP_fbreg <some_offset>, but for the single ret instruction we instead
say those values live in something pointed by stack pointer + offset.
It is true, but only because stack pointer + offset is equal to DW_OP_fbreg
<some_offset> at that point.

The var-tracking pass has for !frame_pointer_needed functions code to
canonicalize stack pointer uses in the insns before it hands it over
to cselib to cfa_base_rtx + offset depending on the stack depth at each
point.  The problem is that on the last epilogue pop insn (the one right
before ret) the canonicalization is sp = argp - 8 and add_stores records
a MO_VAL_SET operation for that argp - 8 value (which is the
SP_DERIVED_VALUE_P VALUE the cselib changes canonicalize sp based accesses
on) and thus var-tracking from that point onwards tracks that that VALUE
(2:2) now lives in sp.  At the end of function it of course needs to forget
it again (or it would need on any changes to sp).  But when processing
that uop, we note that the VALUE has changed and anything based on it
changed too, so emit changes for everything.  Before that var-tracking
itself doesn't track it in any register, so uses cselib and cselib knows
through the permanent equivs how to compute it using argp (i.e. what
will be DW_OP_fbreg).

The following fix has two parts.  One is it detects if cselib can compute
a certain VALUE using the cfa_base_rtx and for such VALUEs doesn't add
the MO_VAL_SET operation, as it is better to express them using cfa_base_rtx
rather than temporarily through something else.  And the other is make sure
we reuse in !frame_pointer_needed the single SP_DERIVED_VALUE_P VALUE in
other extended basic blocks too (and other VALUEs) too.  This can be done
because we have computed the stack depths at the start of each basic block
in vt_stack_adjustments and while cselib_reset_table is called at the end
of each extended bb, which throws away all hard registers (but the magic
cfa_base_rtx) and so can hint cselib.c at the start of the ebb what VALUE
the sp hard reg has.  That means fewer VALUEs during var-tracking and more
importantly that they will all have the cfa_base_rtx + offset equivalency.

I have performed 4 bootstraps+regtests (x86_64-linux and i686-linux,
each with this patch (that is the new cselib + var-tracking variant) and
once with that patch reverted as well as all other cselib.c changes from
this month; once that bootstrapped, I've reapplied the cselib.c changes and
this patch and rebuilt cc1plus, so that the content is comparable, but built
with the pre-Apr 2 cselib.c+var-tracking.c (that is the old cselib one)).

Below are readelf -WS cc1plus | grep debug_ filtered to only have debug
sections whose size actually changed, followed by dwlocstat results on
cc1plus.  This shows that there was about 3% shrink in those .debug*
sections for 32-bit and 1% shrink for 64-bit, with minor variable coverage
changes one or the other way that are IMHO insignificant.

32-bit old cselib
  [33] .debug_info       PROGBITS        00000000 29139c0 710e5fa 00      0   0  1
  [34] .debug_abbrev     PROGBITS        00000000 9a21fba 21ad6d 00      0   0  1
  [35] .debug_line       PROGBITS        00000000 9c3cd27 1a05e56 00      0   0  1
  [36] .debug_str        PROGBITS        00000000 b642b7d 7cad09 01  MS  0   0  1
  [37] .debug_loc        PROGBITS        00000000 be0d886 5792627 00      0   0  1
  [38] .debug_ranges     PROGBITS        00000000 1159fead e57218 00      0   0  1
sum 263075589B
32-bit new cselib + var-tracking
  [33] .debug_info       PROGBITS        00000000 29129c0 71065d1 00      0   0  1
  [34] .debug_abbrev     PROGBITS        00000000 9a18f91 21af28 00      0   0  1
  [35] .debug_line       PROGBITS        00000000 9c33eb9 195dffc 00      0   0  1
  [36] .debug_str        PROGBITS        00000000 b591eb5 7cace0 01  MS  0   0  1
  [37] .debug_loc        PROGBITS        00000000 bd5cb95 50185bf 00      0   0  1
  [38] .debug_ranges     PROGBITS        00000000 10d75154 e57068 00      0   0  1
sum 254515196B (8560393B smaller)
64-bit old cselib
  [33] .debug_info       PROGBITS        0000000000000000 25e64b0 84d7cc9 00      0   0  1
  [34] .debug_abbrev     PROGBITS        0000000000000000 aabe179 225e2d 00      0   0  1
  [35] .debug_line       PROGBITS        0000000000000000 ace3fa6 19a3505 00      0   0  1
  [37] .debug_loc        PROGBITS        0000000000000000 ce6e960 89707bc 00      0   0  1
  [38] .debug_ranges     PROGBITS        0000000000000000 157df11c 1c59a70 00      0   0  1
sum 342274599B
64-bit new cselib + var-tracking
  [33] .debug_info       PROGBITS        0000000000000000 25e64b0 84d8e86 00      0   0  1
  [34] .debug_abbrev     PROGBITS        0000000000000000 aabf336 225e8d 00      0   0  1
  [35] .debug_line       PROGBITS        0000000000000000 ace51c3 199ded5 00      0   0  1
  [37] .debug_loc        PROGBITS        0000000000000000 ce6a54d 85f62da 00      0   0  1
  [38] .debug_ranges     PROGBITS        0000000000000000 15460827 1c59a20 00      0   0  1
sum 338610402B (3664197B smaller)
32-bit old cselib
cov% samples cumul
0..10 1231599/48% 1231599/48%
11..20 31017/1% 1262616/49%
21..30 36495/1% 1299111/51%
31..40 35846/1% 1334957/52%
41..50 47179/1% 1382136/54%
51..60 41203/1% 1423339/56%
61..70 65504/2% 1488843/58%
71..80 59656/2% 1548499/61%
81..90 104399/4% 1652898/65%
91..100 882231/34% 2535129/100%
32-bit new cselib + var-tracking
cov% samples cumul
0..10 1230542/48% 1230542/48%
11..20 30385/1% 1260927/49%
21..30 36393/1% 1297320/51%
31..40 36053/1% 1333373/52%
41..50 47670/1% 1381043/54%
51..60 41599/1% 1422642/56%
61..70 65902/2% 1488544/58%
71..80 59911/2% 1548455/61%
81..90 104607/4% 1653062/65%
91..100 882067/34% 2535129/100%
64-bit old cselib
cov% samples cumul
0..10 1233211/48% 1233211/48%
11..20 31120/1% 1264331/49%
21..30 39230/1% 1303561/51%
31..40 38887/1% 1342448/52%
41..50 47519/1% 1389967/54%
51..60 45264/1% 1435231/56%
61..70 69431/2% 1504662/59%
71..80 62114/2% 1566776/61%
81..90 104587/4% 1671363/65%
91..100 876085/34% 2547448/100%
64-bit new cselib + var-tracking
cov% samples cumul
0..10 1233471/48% 1233471/48%
11..20 31093/1% 1264564/49%
21..30 39217/1% 1303781/51%
31..40 38851/1% 1342632/52%
41..50 47488/1% 1390120/54%
51..60 45224/1% 1435344/56%
61..70 69409/2% 1504753/59%
71..80 62140/2% 1566893/61%
81..90 104616/4% 1671509/65%
91..100 875939/34% 2547448/100%

2020-04-09  Jakub Jelinek  <jakub@redhat.com>

PR debug/94495
* cselib.h (cselib_record_sp_cfa_base_equiv,
cselib_sp_derived_value_p): Declare.
* cselib.c (cselib_record_sp_cfa_base_equiv,
cselib_sp_derived_value_p): New functions.
* var-tracking.c (add_stores): Don't record MO_VAL_SET for
cselib_sp_derived_value_p values.
(vt_initialize): Call cselib_record_sp_cfa_base_equiv at the
start of extended basic blocks other than the first one
for !frame_pointer_needed functions.

aarch64: Add support for arm_sve_vector_bits

This patch implements the "arm_sve_vector_bits" attribute, which can be
used to create fixed-length versions of an SVE type while maintaining
their "SVEness".  For example, when __ARM_FEATURE_SVE_BITS==256:

typedef svint32_t vec __attribute__((arm_sve_vector_bits(256)));

creates a 256-bit version of svint32_t.

The attribute itself is quite simple.  However, it means that we now
need to implement the full PCS rules for scalable types, whereas
previously we only needed to handle scalable types that were built
directly into the compiler.  See:

  https://github.com/ARM-software/abi-aa/blob/master/aapcs64/aapcs64.rst

for more information about these rules.

2020-04-09  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* doc/sourcebuild.texi (aarch64_sve_hw, aarch64_sve128_hw)
(aarch64_sve256_hw, aarch64_sve512_hw, aarch64_sve1024_hw)
(aarch64_sve2048_hw): Document.
* config/aarch64/aarch64-protos.h
(aarch64_sve::handle_arm_sve_vector_bits_attribute): Declare.
* config/aarch64/aarch64-c.c (aarch64_update_cpp_builtins): Define
__ARM_FEATURE_SVE_VECTOR_OPERATIONS when SVE is enabled.
* config/aarch64/aarch64-sve-builtins.cc (matches_type_p): New
function.
(find_type_suffix_for_scalar_type): Use it instead of comparing
TYPE_MAIN_VARIANTs.
(function_resolver::infer_vector_or_tuple_type): Likewise.
(function_resolver::require_vector_type): Likewise.
(handle_arm_sve_vector_bits_attribute): New function.
* config/aarch64/aarch64.c (pure_scalable_type_info): New class.
(aarch64_attribute_table): Add arm_sve_vector_bits.
(aarch64_return_in_memory_1):
(pure_scalable_type_info::piece::get_rtx): New function.
(pure_scalable_type_info::num_zr): Likewise.
(pure_scalable_type_info::num_pr): Likewise.
(pure_scalable_type_info::get_rtx): Likewise.
(pure_scalable_type_info::analyze): Likewise.
(pure_scalable_type_info::analyze_registers): Likewise.
(pure_scalable_type_info::analyze_array): Likewise.
(pure_scalable_type_info::analyze_record): Likewise.
(pure_scalable_type_info::add_piece): Likewise.
(aarch64_some_values_include_pst_objects_p): Likewise.
(aarch64_returns_value_in_sve_regs_p): Use pure_scalable_type_info
to analyze whether the type is returned in SVE registers.
(aarch64_takes_arguments_in_sve_regs_p): Likwise whether the type
is passed in SVE registers.
(aarch64_pass_by_reference_1): New function, extracted from...
(aarch64_pass_by_reference): ...here.  Use pure_scalable_type_info
to analyze whether the type is a pure scalable type and, if so,
whether it should be passed by reference.
(aarch64_return_in_msb): Return false for pure scalable types.
(aarch64_function_value_1): Fold back into...
(aarch64_function_value): ...this function.  Use
pure_scalable_type_info to analyze whether the type is a pure
scalable type and, if so, which registers it should use.  Handle
types that include pure scalable types but are not themselves
pure scalable types.
(aarch64_return_in_memory_1): New function, split out from...
(aarch64_return_in_memory): ...here.  Use pure_scalable_type_info
to analyze whether the type is a pure scalable type and, if so,
whether it should be returned by reference.
(aarch64_layout_arg): Remove orig_mode argument.  Use
pure_scalable_type_info to analyze whether the type is a pure
scalable type and, if so, which registers it should use.  Handle
types that include pure scalable types but are not themselves
pure scalable types.
(aarch64_function_arg): Update call accordingly.
(aarch64_function_arg_advance): Likewise.
(aarch64_pad_reg_upward): On big-endian targets, return false for
pure scalable types that are smaller than 16 bytes.
(aarch64_member_type_forces_blk): New function.
(aapcs_vfp_sub_candidate): Exit early for built-in SVE types.
(aarch64_short_vector_p): Return false for VECTOR_TYPEs that
correspond to built-in SVE types.  Do not rely on a vector mode
if the type includes an pure scalable type.  When returning true,
assert that the mode is not an SVE mode.
(aarch64_vfp_is_call_or_return_candidate): Do not check for SVE
built-in types here.  When returning true, assert that the type
does not have an SVE mode.
(aarch64_can_change_mode_class): Don't allow anything to change
between a predicate mode and a non-predicate mode.  Also don't
allow changes between SVE vector modes and other modes that
might be bigger than 128 bits.
(aarch64_invalid_binary_op): Reject binary operations that mix
SVE and GNU vector types.
(TARGET_MEMBER_TYPE_FORCES_BLK): Define.

gcc/testsuite/
* gcc.target/aarch64/sve/acle/general/attributes_1.c: New test.
* gcc.target/aarch64/sve/acle/general/attributes_2.c: Likewise.
* gcc.target/aarch64/sve/acle/general/attributes_3.c: Likewise.
* gcc.target/aarch64/sve/acle/general/attributes_4.c: Likewise.
* gcc.target/aarch64/sve/acle/general/attributes_5.c: Likewise.
* gcc.target/aarch64/sve/acle/general/attributes_6.c: Likewise.
* gcc.target/aarch64/sve/acle/general/attributes_7.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct.h: New file.
* gcc.target/aarch64/sve/pcs/struct_1_128.c: New test.
* gcc.target/aarch64/sve/pcs/struct_1_256.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_1_512.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_1_1024.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_1_2048.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_2_128.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_2_256.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_2_512.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_2_1024.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_2_2048.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_3_128.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_3_256.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_3_512.c: Likewise.
* lib/target-supports.exp (check_effective_target_aarch64_sve128_hw)
(check_effective_target_aarch64_sve512_hw)
(check_effective_target_aarch64_sve1024_hw)
(check_effective_target_aarch64_sve2048_hw): New procedures.

aarch64: Add a separate "SVE sizeless type" attribute

It's more convenient for a later patch if sizelessness is represented
separately from "SVEness". "SVEness" is an ABI property that carries
forward into gimple and beyond, and continues to matter during LTO.
Sizelessness is just a frontend restriction and can be ignored after
that.

2020-04-09 Richard Sandiford <richard.sandiford@arm.com>

gcc/
* config/aarch64/aarch64.c (aarch64_attribute_table): Add
"SVE sizeless type".
* config/aarch64/aarch64-sve-builtins.cc (make_type_sizeless)
(sizeless_type_p): New functions.
(register_builtin_types): Apply make_type_sizeless to the type.
(register_tuple_type): Likewise.
(verify_type_context): Use sizeless_type_p instead of builin_type_p.

[Arm] Allow the use of arm_cde.h for C++

arm_cde.h includes the arm_mve_types.h header, which declares some C++
overloaded functions.

There is a superfluous `extern "C"` statement in arm_cde.h, which
encompasses these functions.  This means that if compiling for C++, the
overloaded functions are declared, but are declared without name
mangling.  Hence all the function names are the same and we have many
conflicting declarations.

Testing Done:
  Regression tested for arm-none-eabi.

gcc/ChangeLog:

2020-04-09  Matthew Malcomson  <matthew.malcomson@arm.com>

* config/arm/arm_cde.h: Remove `extern "C"` when compiling for
C++.

gcc/testsuite/ChangeLog:

2020-04-09  Matthew Malcomson  <matthew.malcomson@arm.com>

* g++.target/arm/cde_mve.C: New test.

libphobos: Remove --enable-druntime-gc configure option.

This is yet another old option that would have been somewhat useful back
before the D front-end implementation was able to support compiling
without the Druntime library.

Now however, -fno-druntime makes the gcstub package redundant, so the
option has been removed, along with the package itself.

libphobos/ChangeLog:

* configure: Regenerate.
* libdruntime/Makefile.am (ALL_DRUNTIME_INSTALL_DSOURCES): Remove
DRUNTIME_DSOURCES_GC and DRUNTIME_DSOURCES_GCSTUB.
(DRUNTIME_DSOURCES): Add gc/*.d sources.
(DRUNTIME_DSOURCES_GC): Remove.
(DRUNTIME_DSOURCES_GCSTUB): Remove.
* libdruntime/Makefile.in: Regenerate.
* libdruntime/gcstub/gc.d: Remove.
* m4/druntime.m4 (DRUNTIME_GC): Remove.

[testsuite][arm] Fix cmse-15.c expected output

The cmse-15.c testcase fails at -Os because ICF means that we
generate
nonsecure2:
b nonsecure0

which is OK, but does not match the currently expected
nonsecure2:
...
bl __gnu_cmse_nonsecure_call

(see https://gcc.gnu.org/pipermail/gcc-patches/2020-April/543190.html)

The test has already different expectations for v8-M and v8.1-M.

This patch uses check-function-bodies to account for the
different possibilities:
- v8-M vs v8.1-M via different target selectors where needed
- code generation variants (-0?) via multiple regexps

I've tested that the test now passes with --target-board=-march=armv8-m.main
and --target-board=-march=armv8.1-m.main.

[testsuite] scanasm.exp: Fix target-selector handling in check-function-bodies

{target { ! a } } does not work because the greedy regexp extracts
"! a }" instead of "target { ! a }".

This patch replaces it with a non-greedy regexp.

2020-04-09 Christophe Lyon <christophe.lyon@linaro.org>

* lib/scanasm.exp (check-function-bodies): Use non-greedy regexp
when extracting the target selector.

Merge top-level configury changes from gdb

We recently rearranged the gdb source tree to move a common library
and gdbserver to the top-level. This made the build more uniform and
also a bit faster (due to sharing of built objects).

This patch re-syncs these changes the top-level configury back to gcc.

ChangeLog:
* configure: Rebuild.
* Makefile.in: Rebuild.
* Makefile.def (gdbsupport, gdbserver): New host modules.
(configure-gdb): Depend on all-gdbsupport.
(all-gdb): Depend on all-gdbsupport, all-libctf.
* configure.ac (host_tools): Add gdbserver.
Conditionally build gdbserver and gdbsupport.