platform/upstream/gcc.git
4 years agoFortran : ICE in gfc_conv_scalarized_array_ref PR53298
Mark Eggleston [Fri, 17 Jul 2020 13:22:48 +0000 (14:22 +0100)]
Fortran  : ICE in gfc_conv_scalarized_array_ref PR53298

When an array of characters is an argument to a subroutine and
is accessed using (:)(1:) an ICE occurs.  The upper bound of the
substring does not have an expression and such should not have
a Scalarization State structure added to the Scalarization State
chain.

2020-07-29  Mark Eggleston  <markeggleston@gcc.gnu.org>

gcc/fortran/

PR fortran/53298
* trans-array.c (gfc_walk_array_ref): If ref->ss.end is set
call gfc_get_scalar_ss.

2020-07-29  Mark Eggleston  <markeggleston@gcc.gnu.org>

gcc/testsuite/

PR fortran/53298
* gfortran.dg/pr53298.f90: New test.

4 years agolibstdc++: Fix unordered containers move constructors noexcept qualification
François Dumont [Mon, 20 Jan 2020 18:15:43 +0000 (19:15 +0100)]
libstdc++: Fix unordered containers move constructors noexcept qualification

_Hashtable move constructor is wrongly qualified as noexcept(true) regardless of
_Equal and _H1 copy constructor qualifications.
_Hashtable allocator-aware move constructor is missing its noexcept
qualification like the depending unordered containers ones.

libstdc++-v3/ChangeLog:

* include/bits/hashtable.h
(_Hashtable(_Hashtable&& __ht, __node_alloc_type&& __a, true_type)):
Add noexcept qualification.
(_Hashtable(_Hashtable&&)): Fix noexcept qualification.
(_Hashtable(_Hashtable&&, const allocator_type&)): Add noexcept
qualification.
* include/bits/unordered_map.h
(unordered_map(unordered_map&&, const allocator_type&)): Add noexcept
qualification.
(unordered_multimap(unordered_multimap&&, const allocator_type&)):
Likewise.
* include/bits/unordered_set.h
(unordered_set(unordered_set&&, const allocator_type&)): Likewise.
(unordered_multiset(unordered_multiset&&, const allocator_type&)):
Likewise.
* include/debug/unordered_map
(unordered_map(unordered_map&&, const allocator_type&)): Likewise.
(unordered_multimap(unordered_multimap&&, const allocator_type&)):
Likewise.
* include/debug/unordered_set
(unordered_set(unordered_set&&, const allocator_type&)): Likewise.
(unordered_multiset(unordered_multiset&&, const allocator_type&)):
Likewise.
* testsuite/23_containers/unordered_map/allocator/default_init.cc:
New test.
* testsuite/23_containers/unordered_map/cons/noexcept_default_construct.cc:
New test.
* testsuite/23_containers/unordered_map/cons/noexcept_move_construct.cc:
New test.
* testsuite/23_containers/unordered_map/modifiers/move_assign.cc:
New test.
* testsuite/23_containers/unordered_multimap/cons/noexcept_default_construct.cc:
New test.
* testsuite/23_containers/unordered_multimap/cons/noexcept_move_construct.cc:
New test.
* testsuite/23_containers/unordered_multiset/cons/noexcept_default_construct.cc:
New test.
* testsuite/23_containers/unordered_multiset/cons/noexcept_move_construct.cc:
New test.
* testsuite/23_containers/unordered_set/allocator/default_init.cc:
New test.
* testsuite/23_containers/unordered_set/cons/noexcept_default_construct.cc:
New test.
* testsuite/23_containers/unordered_set/cons/noexcept_move_construct.cc:
New test.

4 years agovect: Fix infinite loop while determining peeling amount
Stefan Schulze Frielinghaus [Wed, 22 Jul 2020 07:27:49 +0000 (09:27 +0200)]
vect: Fix infinite loop while determining peeling amount

This is a follow up to commit 5c9669a0e6c respectively discussion
https://gcc.gnu.org/pipermail/gcc-patches/2020-June/549132.html

In case a type has a lower alignment than its size, ensure that we
advance.  For example, on s390x we have for a long double an alignment
constraint of 8 bytes whereas the size is 16 bytes.  Increasing the loop
variable only by TARGET_ALIGN / DR_SIZE which equals zero in case of a
long double results in an infinite loop.  This is fixed by ensuring that
we advance at least by one.

gcc/ChangeLog:

* tree-vect-data-refs.c (vect_enhance_data_refs_alignment):
Ensure that loop variable npeel_tmp advances in each iteration.

4 years agoOpenMP: Add 'omp requires' to Fortran (mostly parsing)
Tobias Burnus [Wed, 29 Jul 2020 08:37:44 +0000 (10:37 +0200)]
OpenMP: Add 'omp requires' to Fortran (mostly parsing)

gcc/fortran/ChangeLog:

* gfortran.h (enum gfc_statement): Add ST_OMP_REQUIRES.
(enum gfc_omp_requires_kind): New.
(enum gfc_omp_atomic_op): Add GFC_OMP_ATOMIC_ACQ_REL.
(struct gfc_namespace): Add omp_requires and omp_target_seen.
(gfc_omp_requires_add_clause,
(gfc_check_omp_requires): New.
* match.h (gfc_match_omp_requires): New.
* module.c (enum ab_attribute, attr_bits): Add omp requires clauses.
(mio_symbol_attribute): Read/write them.
* openmp.c (gfc_check_omp_requires, (gfc_omp_requires_add_clause,
gfc_match_omp_requires): New.
(gfc_match_omp_oacc_atomic): Use requires's default mem-order.
* parse.c (decode_omp_directive): Match requires, set omp_target_seen.
(gfc_ascii_statement): Handle ST_OMP_REQUIRES.
* trans-openmp.c (gfc_trans_omp_atomic): Handle GFC_OMP_ATOMIC_ACQ_REL.

gcc/testsuite/ChangeLog:

* gfortran.dg/gomp/requires-1.f90: New test.
* gfortran.dg/gomp/requires-2.f90: New test.
* gfortran.dg/gomp/requires-3.f90: New test.
* gfortran.dg/gomp/requires-4.f90: New test.
* gfortran.dg/gomp/requires-5.f90: New test.
* gfortran.dg/gomp/requires-6.f90: New test.
* gfortran.dg/gomp/requires-7.f90: New test.
* gfortran.dg/gomp/requires-8.f90: New test.
* gfortran.dg/gomp/requires-9.f90: New test.

4 years agoconfig/mmix/mmix.h (NO_FUNCTION_CSE): Define to 1.
Hans-Peter Nilsson [Wed, 29 Jul 2020 00:46:09 +0000 (02:46 +0200)]
config/mmix/mmix.h (NO_FUNCTION_CSE): Define to 1.

The tests gcc.dg/tree-ssa/loop-1.c and gcc.dg/weak/typeof-2.c
assume this setting and are as a consequence riddled with
exceptions for targets that actually do yield better code when
calling through a register rather than repeatedly the same
symbol.  Nonetheless, defining it makes sense for MMIX.

(Even better IMHO, this macro shouldn't exist and instead rtx
costs be used or perhaps just a target-specific default of
flag_no_function_cse.)

gcc:
* config/mmix/mmix.h (NO_FUNCTION_CSE): Define to 1.

4 years agommix.h (ASM_OUTPUT_EXTERNAL): Define to default_elf_asm_output_external.
Hans-Peter Nilsson [Wed, 29 Jul 2020 00:29:54 +0000 (02:29 +0200)]
mmix.h (ASM_OUTPUT_EXTERNAL): Define to default_elf_asm_output_external.

Whoops.  When un-disabling visibility support for mmix, I missed that
some of the newly enabled tests were FAILs, for not emitting .hidden
for references to external declarations.  This takes care of
gcc.dg/visibility-14.c .. -19.c, and gcc.dg/visibility-23.c.

gcc:
* config/mmix/mmix.h (ASM_OUTPUT_EXTERNAL): Define to
default_elf_asm_output_external.

4 years agoDaily bump.
GCC Administrator [Wed, 29 Jul 2020 00:16:24 +0000 (00:16 +0000)]
Daily bump.

4 years agoipa/96291: don't crash on unoptimized lto functions
Sergei Trofimovich [Sat, 25 Jul 2020 18:26:50 +0000 (19:26 +0100)]
ipa/96291: don't crash on unoptimized lto functions

In PR ipa/96291 the test contained an SCC with one
unoptimized function. This tricked ipa-cp into NULL dereference.

has_undead_caller_from_outside_scc_p() did not take into account
that unoptimized funtions don't have IPA summary analysis. And
dereferenced NULL pointer causing an ICE.

gcc/
PR ipa/96291
* ipa-cp.c (has_undead_caller_from_outside_scc_p): Consider
unoptimized callers as undead.

gcc/testsuite/
PR ipa/96291
* gcc.dg/lto/pr96291_0.c: New testcase.
* gcc.dg/lto/pr96291_1.c: Support file.
* gcc.dg/lto/pr96291_2.c: Likewise.
* gcc.dg/lto/pr96291.h: Likewise.

4 years agomiddle-end: Parity and popcount folding optimizations.
Roger Sayle [Tue, 28 Jul 2020 21:55:12 +0000 (22:55 +0100)]
middle-end: Parity and popcount folding optimizations.

This patch implements several constant folding optimizations
for __builtin_parity and friends.  We canonicalize popcount(x)&1
as parity(x) in gimple, and potentially convert back again when
we expand to RTL.  parity(~x) is simplified to parity(x), which
is true for all integer modes with an even number of bits.
But probably most usefully, parity(x)^parity(y) can be simplified
to a parity(x^y), requiring only a single libcall or popcount.

This patch optimizes popcount and parity of an argument known to have
at most a single bit set, to be that single bit.  Hence, popcount(x&8)
is simplified to (x>>3)&1.   This generalizes the existing optimization
of popcount(x&1) being simplified to x&1, which is cleaned up with
this patch.

2020-07-28  Roger Sayle  <roger@nextmovesoftware.com>
    Richard Biener  <rguenther@suse.de>

gcc/ChangeLog
* match.pd (popcount(x)&1 -> parity(x)): New simplification.
(parity(~x) -> parity(x)): New simplification.
(parity(x)^parity(y) -> parity(x^y)): New simplification.
(parity(x&1) -> x&1): New simplification.
(popcount(x) -> x>>C): New simplification.

gcc/testsuite/ChangeLog
* gcc.dg/fold-popcount-5.c: New test.
* gcc.dg/fold-parity-1.c: Likewise.
* gcc.dg/fold-parity-2.c: Likewise.
* gcc.dg/fold-parity-3.c: Likewise.
* gcc.dg/fold-parity-4.c: Likewise.
* gcc.dg/fold-parity-5.c: Likewise.

4 years agoc++: Set more DECL_CONTEXTs
Nathan Sidwell [Tue, 28 Jul 2020 15:57:36 +0000 (08:57 -0700)]
c++: Set more DECL_CONTEXTs

I discovered we were not setting DECL_CONTEXT in a few cases, and
grokfndecl's control flow wasn't making it clear that we were doing it
in all cases.

gcc/cp/
* cp-gimplify.c (cp_genericize_r): Set IMPORTED_DECL's context.
* cp-objcp-common.c (cp_pushdecl): Set decl's context.
* decl.c (grokfndecl): Make DECL_CONTEXT setting clearer.

4 years agoc++: better fixup_type_variants
Nathan Sidwell [Tue, 28 Jul 2020 15:49:13 +0000 (08:49 -0700)]
c++: better fixup_type_variants

fixup_type_variants was almost doing all that finish_struct needs.
May as well make it do it all.

gcc/cp/
* class.c (fixup_type_variants): Copy TYPE_SIZE and
TYPE_SIZE_UINIT.
(finish_struct): Call it.

4 years agoc++: tree dump indentation
Nathan Sidwell [Tue, 28 Jul 2020 15:33:48 +0000 (08:33 -0700)]
c++: tree dump indentation

We were always forcing an indent, even if there was nothing to indent.
Fixed thusly.

gcc/cp/
* ptree.c (cxx_print_decl): Better indentation.

4 years agotestsuite: Fix spello
Nathan Sidwell [Tue, 28 Jul 2020 15:31:19 +0000 (08:31 -0700)]
testsuite: Fix spello

'Patterns' has one 'r'.

gcc/testsuite/
* lib/options.exp: Fix spello

4 years agoc++: Fix up cp_lexer_safe_previous_token [PR96328]
Jakub Jelinek [Tue, 28 Jul 2020 13:41:30 +0000 (15:41 +0200)]
c++: Fix up cp_lexer_safe_previous_token [PR96328]

The following testcase ICEs, because cp_lexer_safe_previous_token calls
cp_lexer_previous_token and that ICEs, because all tokens in the lexer
buffer before the current one (CPP_EOF) have been purged.

cp_lexer_safe_previous_token is used in the context where it is ok if it
punts, so the patch changes the function so that it doesn't assert there is
some previous token, but instead returns NULL like in other cases where it
punts.

In addition to this, in the last hunk it does a micro-optimization, don't
call the potentially expensive function if it will not need the result,
instead check the least expensive condition first.

And the middle hunk is a similar change from Mark's version of the patch,
to use the safe variant in there because it is again just about a hint
and it is better not to provide the hint than to ICE, though we don't have a
testcase that would ICE.

2020-07-28  Jakub Jelinek  <jakub@redhat.com>
    Mark Wielaard  <mark@klomp.org>

PR c++/96328
* parser.c (cp_lexer_safe_previous_token): Don't call
cp_lexer_previous_token, instead inline it by hand and return NULL
instead of failing assertion if all previous tokens until the first
one are purged.
(cp_parser_error_1): Optimize - only call cp_lexer_safe_previous_token
if token->type is CPP_NAME.  Use cp_lexer_safe_previous_token instead
of cp_lexer_previous_token for the missing_token_desc != RT_NONE
case too.

* g++.dg/diagnostic/pr96328.C: New test.

Co-Authored-By: Mark Wielaard <mark@klomp.org>
4 years agolibcpp: Fix up raw string literal parsing error-recovery [PR96323]
Jakub Jelinek [Tue, 28 Jul 2020 13:40:15 +0000 (15:40 +0200)]
libcpp: Fix up raw string literal parsing error-recovery [PR96323]

For (invalid) newline inside of the raw string literal delimiter, doing
continue means we skip the needed processing of newlines.  Instead of
duplicating that, this patch just doesn't continue for those.

2020-07-28  Jakub Jelinek  <jakub@redhat.com>

PR preprocessor/96323
* lex.c (lex_raw_string): For c == '\n' don't continue after reporting
an prefix delimiter error.

* c-c++-common/cpp/pr96323.c: New test.

4 years agonvptx: Support 16-bit shifts and extendqihi2
Tom de Vries [Tue, 28 Jul 2020 13:13:54 +0000 (15:13 +0200)]
nvptx: Support 16-bit shifts and extendqihi2

Add support for 16-bits shifts and for sign extension from 8 bits to
16 bits.

This patch has been tested on nvptx-none with no new regressions.

2020-07-28  Roger Sayle  <roger@nextmovesoftware.com>
    Tom de Vries  <tdevries@suse.de>

gcc/ChangeLog:

* config/nvptx/nvptx.md (extendqihi2): New instruction.
(ashl<mode>3, ashr<mode>3, lshr<mode>3): Support HImode.

gcc/testsuite/ChangeLog:

* gcc.target/nvptx/cvt.c: New test.
* gcc.target/nvptx/shift16.c: New test.

4 years agopreprocessor: Simplify read_main
Nathan Sidwell [Tue, 28 Jul 2020 12:49:35 +0000 (05:49 -0700)]
preprocessor: Simplify read_main

We can always use the final map to get the return value, rather than
conditionally only when there was an immediate line directive.

libcpp/
* init.c (cpp_read_main_file): Always use the last map for
the return value.

4 years agolibstdc++: Do not over-size hashtable buckets on range insertion
François Dumont [Mon, 20 Jan 2020 18:01:18 +0000 (19:01 +0100)]
libstdc++: Do not over-size hashtable buckets on range insertion

We used to consider range size on insertion but on unique keys container
not all range values might be inserted resulting in over-sizing. In this
case we just consider user reservation and if none then the container will
adapt to actually inserted elements.

libstdc++-v3/ChangeLog:

* include/bits/hashtable.h
(_Hashtable<>(_InputIterator, _InputIterator, size_t, const _H1&,
const _H2&, const _Hash&, const _Equal&, const _ExtractKey&,
const allocator_type&, true_type)): New.
(_Hashtable<>(_InputIterator, _InputIterator, size_t, const _H1&,
const _H2&, const _Hash&, const _Equal&, const _ExtractKey&,
const allocator_type&, false_type)): New.
(_Hashtable<>(_InputIterator, _InputIterator, size_t, const _H1&,
const _H2&, const _Hash&, const _Equal&, const _ExtractKey&,
const allocator_type&)): Delegate to latters.
(operator=(initializer_list<value_type>)): Rehash if too small.
(_M_insert(_Arg&&, const _NodeGenerator&, true_type)): Remove
size_t len parameter.
* include/bits/hashtable_policy.h (_Insert_base<>::_M_insert_range):
Do not try to get input range distance.
* testsuite/23_containers/unordered_set/cons/bucket_hint.cc: New test.
* testsuite/23_containers/unordered_set/modifiers/insert.cc: New test.

4 years agotestsuite: Fix up nontype-subob1.C for targets with short int, int or long long ssize_t
Jakub Jelinek [Tue, 28 Jul 2020 09:32:36 +0000 (11:32 +0200)]
testsuite: Fix up nontype-subob1.C for targets with short int, int or long long ssize_t

2020-07-28  Jakub Jelinek  <jakub@redhat.com>

* g++.dg/cpp2a/nontype-subob1.C: Allow s1, i1 or x1 instead of l1 for
targets with short, int or long long ssize_t.

4 years agoexpander: Fix ICE in maybe_warn_rdwr_sizes [PR96335]
Jakub Jelinek [Tue, 28 Jul 2020 09:08:29 +0000 (11:08 +0200)]
expander: Fix ICE in maybe_warn_rdwr_sizes [PR96335]

The following testcase ICEs in maybe_warn_rdwr_sizes.  The problem is that
the caller uses its fndecl and fntype variables to fill up rdwr_map, and
the fntype in that case is a prototype with the access attribute and all
the checks needed for that performed.  But the maybe_warn_rdwr_sizes
function tries to rediscover fndecl/fntype itself and does it differently
from how the caller did (for fndecl get_callee_fndecl and fntype from that
FUNCTION_DECL, otherwise sets fntype to CALL_EXPR_FN's type).

On the testcase, get_callee_fndecl does find a FUNCTION_DECL because
it does STRIP_NOPS in between.

Instead of trying to rediscover those, this patch just passes them down,
like is done in several other functions.

2020-07-28  Jakub Jelinek  <jakub@redhat.com>

PR middle-end/96335
* calls.c (maybe_warn_rdwr_sizes): Add FNDECL and FNTYPE arguments,
instead of trying to rediscover them in the body.
(initialize_argument_information): Adjust caller.

* gcc.dg/pr96335.c: New test.

4 years agovect: Refactor peel_iters_{pro,epi}logue cost modeling
Kewen Lin [Tue, 28 Jul 2020 02:30:26 +0000 (21:30 -0500)]
vect: Refactor peel_iters_{pro,epi}logue cost modeling

This patch is to refactor the existing peel_iters_prologue and
peel_iters_epilogue cost model handlings, by following the structure
below suggested by Richard Sandiford:

  - calculate peel_iters_prologue
  - calculate peel_iters_epilogue
  - add costs associated with peel_iters_prologue
  - add costs associated with peel_iters_epilogue
  - add costs related to branch taken/not_taken.

Bootstrapped/regtested on aarch64-linux-gnu.

gcc/ChangeLog:

* tree-vect-loop.c (vect_get_known_peeling_cost): Factor out some code
to determine peel_iters_epilogue to...
(vect_get_peel_iters_epilogue): ...this new function.
(vect_estimate_min_profitable_iters): Refactor cost calculation on
peel_iters_prologue and peel_iters_epilogue.

4 years agoDaily bump.
GCC Administrator [Tue, 28 Jul 2020 00:16:25 +0000 (00:16 +0000)]
Daily bump.

4 years agocompiler,runtime: pass only ptr and len to some runtime calls
Ian Lance Taylor [Mon, 27 Jul 2020 22:19:54 +0000 (15:19 -0700)]
compiler,runtime: pass only ptr and len to some runtime calls

This ports https://golang.org/cl/227163 to the Go frontend.
This is a step toward moving up to the go1.15rc1 release.

Original CL description:

    cmd/compile,runtime: pass only ptr and len to some runtime calls

    Some runtime calls accept a slice, but only use ptr and len.
    This change modifies most such routines to accept only ptr and len.

    After this change, the only runtime calls that accept an unnecessary
    cap arg are concatstrings and slicerunetostring.
    Neither is particularly common, and both are complicated to modify.

    Negligible compiler performance impact. Shrinks binaries a little.
    There are only a few regressions; the one I investigated was
    due to register allocation fluctuation.

    Passes 'go test -race std cmd', modulo golang/go#38265 and golang/go#38266.
    Wow, does that take a long time to run.

    file      before    after     Δ       %
    compile   19655024  19655152  +128    +0.001%
    cover     5244840   5236648   -8192   -0.156%
    dist      3662376   3658280   -4096   -0.112%
    link      6680056   6675960   -4096   -0.061%
    pprof     14789844  14777556  -12288  -0.083%
    test2json 2824744   2820648   -4096   -0.145%
    trace     11647876  11639684  -8192   -0.070%
    vet       8260472   8256376   -4096   -0.050%
    total     115163736 115118808 -44928  -0.039%

For golang/go#36890

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/245099

4 years agocompiler: for package-scope "a = b; b = x" just set "a = x"
Ian Lance Taylor [Mon, 27 Jul 2020 21:22:55 +0000 (14:22 -0700)]
compiler: for package-scope "a = b; b = x" just set "a = x"

This avoids requiring an init function to initialize the variable.
This can only be done if x is a static initializer.

The go1.15rc1 runtime package relies on this optimization.
The package has a variable "var maxSearchAddr = maxOffAddr".
The maxSearchAddr variable is used by code that runs before package
initialization is complete.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/245098

4 years agogcc.dg/torture/pr39074-2.c, pr39074.c, pta-callused-1.c: Adjust for mmix.
Hans-Peter Nilsson [Mon, 27 Jul 2020 23:41:47 +0000 (01:41 +0200)]
gcc.dg/torture/pr39074-2.c, pr39074.c, pta-callused-1.c: Adjust for mmix.

These FAILs for mmix showed up as regressions for me due to a
flaw in the btest-gcc.sh test-results-accounting: a bug was
recently fixed regarding the naming of dump-files so the names
are again correct.  To wit, parts of the tests that were
UNRESOLVED, due to missing dump-files, and ignored in the
presence of other parts (execution, excess errors) PASSing,
became FAIL, trumping the PASSing parts of the tests.

As in a recent patch, the variables are "privatized" using
ASM_PN_FORMAT for MMIX and the lines to match look like:
 y::0_1 = { i }
 y::0_1, points-to NULL, points-to vars: { D.1465 } (nonlocal, escaped)
instead of e.g. for cris-elf:
 y.0_1 = { i }
 y.0_1, points-to NULL, points-to vars: { D.1433 } (nonlocal, escaped)
Also checked that the general pattern still matches for cris-elf.

gcc/testsuite:
* gcc.dg/torture/pr39074-2.c: Adjust for mmix.
* gcc.dg/torture/pr39074.c, gcc.dg/torture/pta-callused-1.c: Ditto.

4 years agoUpdate gcc .po files.
Joseph Myers [Mon, 27 Jul 2020 22:51:58 +0000 (22:51 +0000)]
Update gcc .po files.

* be.po, da.po, de.po, el.po, es.po, fi.po, fr.po, hr.po, id.po,
ja.po, nl.po, ru.po, sr.po, sv.po, tr.po, uk.po, vi.po, zh_CN.po,
zh_TW.po: Update.

4 years agocommon: Use strcmp to compare location file names
Nathan Sidwell [Mon, 27 Jul 2020 20:05:28 +0000 (13:05 -0700)]
common: Use strcmp to compare location file names

The logic to figure out where a missing #include should be inserted
uses pointer equality to check filenames -- the routine even says so.
But cpplib makes no such guarantee.  It happens to be true for input
that it preprocesses[* see line zero below], but is not true for
source that has already been preprocessed -- all those '# ...' line
directives produce disctinct filename strings.  That renders using
-fdirectives-only as a prescanning stage (as I understand some people
do), broken.

This patch changes to string comparisons, and explicitly rejects any
line-zero location map that occurs at the beginning of a file.  The
very first map of a file has a different string to the remaining maps,
and we never tripped on that because of the pointer comparison.  The
second testcase deploys -save-temps to cause an intermediate
preprocessed output that is read back.

gcc/c-family/
* c-common.c (try_to_locate_new_include_insertion_point): Use
strcmp, not pointer equality.
gcc/testsuite/
* g++.dg/lookup/missing-std-include-10.h: New.
* g++.dg/lookup/missing-std-include-10.C: New.
* g++.dg/lookup/missing-std-include-11.C: New.

4 years agoc++: Name as_base type
Nathan Sidwell [Wed, 22 Jul 2020 19:00:02 +0000 (12:00 -0700)]
c++: Name as_base type

The as-base type never got a name.  For modules I needed to give it a
name to serialize properly, and it's useful when debugging the
compiler, so we may as well have it on trunk.  There's also a bug
where its fields can have NSDMIs from the main class.  This happens to
be silent on trunk, but can be a GC leak where we retain a deferred
parse node there. (On modules it blows up, because we're not prepared
to serialize deferred parse nodes, as they should never survive
parsing.

gcc/cp/
* cp-tree.h (enum cp_tree_index): Add CPTI_AS_BASE_IDENTIFIER.
(as_base_identifier): Define.
* decl.c (initialize_predifined_identifiers): Initialize as_base
identifier.
* class.c (layout_class_type): Name the as-base type.  Zap
NSDMI its fields may have.

4 years agoDiagnose just-past-the-end references for minor array bounds.
Martin Sebor [Mon, 27 Jul 2020 19:54:50 +0000 (13:54 -0600)]
Diagnose just-past-the-end references for minor array bounds.

Resolves:
PR tree-optimization/84079 - missing -Warray-bounds taking the address of past-the-end element of a multidimensional array

gcc/ChangeLog:

PR tree-optimization/84079
* gimple-array-bounds.cc (array_bounds_checker::check_addr_expr):
Only allow just-past-the-end references for the most significant
array bound.

gcc/testsuite/ChangeLog:

PR tree-optimization/84079
* gcc.dg/Warray-bounds-62.c: New test.

4 years agolibstdc++: Review _Hashtable count, equal_range _M_erase(false_type,) code
François Dumont [Mon, 20 Jan 2020 07:24:47 +0000 (08:24 +0100)]
libstdc++: Review _Hashtable count, equal_range _M_erase(false_type,) code

Simplify operator[] implementation using find method. Review several
_Hashtable method implementations to limit the computation of bucket index.
Introduce _M_update_bbegin to simplify code.

libstdc++-v3/ChangeLog:

* include/bits/hashtable_policy.h (_Map_base<>::at): Use
_Hashtable<>::find.
(_Hashtable_base<>::_Equal_hash_code<>::_S_node_equals):New.
(_Hashtable_base<>::_M_node_equals): New, use latter.
(_Equality<_Key, _Value, _Alloc, _ExtractKey, _Equal, _H1, _H2, _Hash,
_RehashPolicy, false>::_M_equal): Adapt to use latter.
* include/bits/hashtable.h (_Hashtable<>::_M_update_bbegin): New.
(_Hashtable<>::_M_assign): Use latter.
(_Hashtable<>::_M_move_assign): Likewise.
(_Hashtable<>(_Hashtable<>&&)): Likewise.
(_Hashtable<>(_Hashtable<>&&, const allocator_type&)): Likewise.
(_Hashtable<>::swap): Likewise.
(_Hashtable<>::find): Build iterator directly from _M_find_node result.
(_Hashtable<>::count): Use _Hashtable<>::find.
(_Hashtable<>::equal_range): Likewise.
(_Hashtable<>::_M_erase(false_type, const key_type&)): Use
_M_node_equals.

4 years agodriver: fix a problem with implementation of -falign-foo=0 [PR96247]
Hu Jiangping [Mon, 27 Jul 2020 17:22:23 +0000 (18:22 +0100)]
driver: fix a problem with implementation of -falign-foo=0 [PR96247]

This patch makes the -falign-foo=0 work as described in the
documentation. Thanks for all the suggestions.

Changelog:
2020-07-27  Hu Jiangping  <hujiangping@cn.fujitsu.com>

PR driver/96247
* opts.c (check_alignment_argument): Set the -falign-Name
on/off flag on and set the -falign-Name string value null,
when the command-line specified argument is zero.

4 years agocompiler: scan all function literals for escape analysis
Ian Lance Taylor [Sun, 26 Jul 2020 18:08:13 +0000 (11:08 -0700)]
compiler: scan all function literals for escape analysis

We were scanning only function literals with closures, but not all
function literals have closures.

Discovered because compiler failed building 1.15rc1, as there is a
function literal in the runtime package (p1 in hexdumpWords) that has
no closure and, without escape analysis, was forcing a variable to the
heap which is not permitted in the runtime.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/244802

4 years agoopenacc: Deep copy attach/detach should not affect reference counts
Julian Brown [Thu, 18 Jun 2020 12:11:08 +0000 (05:11 -0700)]
openacc: Deep copy attach/detach should not affect reference counts

Attach and detach operations are not supposed to affect structural or
dynamic reference counts for OpenACC. Previously they did so, which led to
subtle problems in some circumstances. We can avoid reference-counting
attach/detach operations by extending and slightly repurposing the
do_detach field in target_var_desc. It is now called is_attach to better
reflect its new role.

2020-07-27  Julian Brown  <julian@codesourcery.com>
    Thomas Schwinge  <thomas@codesourcery.com>

libgomp/
* libgomp.h (struct target_var_desc): Rename do_detach field to
is_attach.
* oacc-mem.c (goacc_exit_datum_1): Add assert.  Don't set finalize for
GOMP_MAP_FORCE_DETACH. Update checking to use is_attach field.
(goacc_enter_data_internal): Don't affect reference counts
for attach mappings.
(goacc_exit_data_internal): Don't affect reference counts for detach
mappings.
* target.c (gomp_map_vars_existing): Don't affect reference counts for
attach mappings.
(gomp_map_vars_internal): Set renamed is_attach flag unconditionally to
mark attach mappings.
(gomp_unmap_vars_internal): Use is_attach flag to prevent affecting
reference count for attach mappings.
* testsuite/libgomp.oacc-c-c++-common/mdc-refcount-1.c: New test.
* testsuite/libgomp.oacc-c-c++-common/mdc-refcount-2.c: New test.
* testsuite/libgomp.oacc-c-c++-common/mdc-refcount-2.c: New test.
* testsuite/libgomp.oacc-fortran/deep-copy-6-no_finalize.F90: Mark
test as shouldfail.
* testsuite/libgomp.oacc-fortran/deep-copy-6.f90: Adjust to fail
gracefully in no-finalize mode.

Co-Authored-By: Thomas Schwinge <thomas@codesourcery.com>
4 years agolibstdc++: Make std::from_chars always round to nearest
Jonathan Wakely [Mon, 27 Jul 2020 14:51:16 +0000 (15:51 +0100)]
libstdc++: Make std::from_chars always round to nearest

Also fix the tests that fail on targets without uselocale.

libstdc++-v3/ChangeLog:

* src/c++17/floating_from_chars.cc (from_chars_impl): Ensure
that FE_NEAREST is used.
* testsuite/20_util/from_chars/4.cc: Do not use if constexpr in
a { target c++14 } test.
[!_GLIBCXX_HAVE_USELOCALE]: Disable all tests.
* testsuite/20_util/from_chars/5.cc [!_GLIBCXX_HAVE_USELOCALE]:
Likewise.
* testsuite/20_util/from_chars/6.cc: New test.

4 years agoexpr: build string_constant only for a char type
Martin Liska [Mon, 27 Jul 2020 10:30:24 +0000 (12:30 +0200)]
expr: build string_constant only for a char type

gcc/ChangeLog:

PR tree-optimization/96058
* expr.c (string_constant): Build string_constant only
for a type that has same precision as char_type_node
and is an integral type.

4 years agoRemove useless backedge marking
Richard Biener [Fri, 24 Jul 2020 14:50:59 +0000 (16:50 +0200)]
Remove useless backedge marking

I didn't find anything using EDGE_DFS_BACK in RTL infrastructure
used by var-tracking or var-tracking itself, the following removes
this computation.

2020-07-24  Richard Biener  <rguenther@suse.de>

* var-tracking.c (variable_tracking_main_1): Remove call
to mark_dfs_back_edges.

4 years agoDo not expand vector comparison with VEC_COND_EXPR.
Martin Liska [Mon, 27 Jul 2020 11:55:38 +0000 (13:55 +0200)]
Do not expand vector comparison with VEC_COND_EXPR.

gcc/ChangeLog:

PR tree-optimization/96128
* tree-vect-generic.c (expand_vector_comparison): Do not expand
vector comparison with VEC_COND_EXPR.

gcc/testsuite/ChangeLog:

PR tree-optimization/96128
* gcc.target/s390/vector/pr96128.c: New test.

4 years agoLTO: Add -fcf-protection=check
H.J. Lu [Thu, 16 Jul 2020 14:03:27 +0000 (07:03 -0700)]
LTO: Add -fcf-protection=check

Mixing -fcf-protection and -fcf-protection=none objects are allowed.
Linker just merges -fcf-protection values from all input objects.

Add -fcf-protection=check for the final link with LTO.  An error is
issued if LTO object files are compiled with different -fcf-protection
values.  Otherwise, -fcf-protection=check is ignored at the compile
time.  Without explicit -fcf-protection at link time, -fcf-protection
values from LTO object files are merged at the final link.

gcc/

PR bootstrap/96203
* common.opt: Add -fcf-protection=check.
* flag-types.h (cf_protection_level): Add CF_CHECK.
* lto-wrapper.c (merge_and_complain): Issue an error for
mismatching -fcf-protection values with -fcf-protection=check.
Otherwise, merge -fcf-protection values.
* doc/invoke.texi: Document -fcf-protection=check.

gcc/testsuite/

PR bootstrap/96203
* gcc.target/i386/pr96203-1.c: New test.
* gcc.target/i386/pr96203-2.c: Likewise.

4 years ago[Ada] Revert "Revamp dump and aux output names"
Alexandre Oliva [Thu, 2 Jul 2020 07:25:26 +0000 (03:25 -0400)]
[Ada] Revert "Revamp dump and aux output names"

gcc/ada/

* switch.adb (Is_Internal_GCC_Switch): Revert accidental
reintroduction of auxbase and auxbase-strip.

4 years ago[Ada] Ada2020: AI12-0027 Access values and unaliased component
Javier Miranda [Thu, 18 Jun 2020 20:07:52 +0000 (16:07 -0400)]
[Ada] Ada2020: AI12-0027 Access values and unaliased component

gcc/ada/

* sem_res.adb (Resolve_Actuals): Restrict the check on matching
aliased components to view conversions of array types that are
not placed in an instance. In such case at runtime an object is
created.
* sem_util.ads (Is_Actual_In_Out_Parameter, Is_View_Conversion):
New subprograms.
* sem_util.adb (Is_Actual_In_Out_Parameter, Is_View_Conversion):
New subprograms.

4 years ago[Ada] Assert failure on incorrect code
Arnaud Charlet [Fri, 19 Jun 2020 13:50:34 +0000 (09:50 -0400)]
[Ada] Assert failure on incorrect code

gcc/ada/

* lib-xref.adb (Generate_Reference): Protect against malformed
tree in case of severe errors.
* sem_ch8.adb (Add_Implicit_Operator): Ditto.

4 years ago[Ada] Switch Ada_Version_Runtime to Ada 2020
Arnaud Charlet [Thu, 18 Jun 2020 09:34:17 +0000 (05:34 -0400)]
[Ada] Switch Ada_Version_Runtime to Ada 2020

gcc/ada/

* opt.ads (Ada_Version_Runtime): Set to Ada_2020.
* sem_ch3.adb (Analyze_Subtype_Declaration): Propagate
Is_Independent flag to subtypes.
* libgnarl/s-taprop__linux.adb: Adapt to Ada 2020 warning.
* libgnat/a-nbnbin.adb, libgnat/a-nbnbin.ads,
libgnat/a-nbnbin__gmp.adb, libgnat/a-nbnbre.adb,
libgnat/a-nbnbre.ads, libgnat/a-stobbu.adb,
libgnat/a-stobbu.ads, libgnat/a-stobfi.adb,
libgnat/a-stobfi.ads, libgnat/a-stoubu.adb,
libgnat/a-stoubu.ads, libgnat/a-stoufi.adb,
libgnat/a-stoufi.ads, libgnat/a-stoufo.adb,
libgnat/a-stoufo.ads, libgnat/a-stouut.adb,
libgnat/a-stouut.ads, libgnat/a-strsto.ads,
libgnat/a-ststbo.adb, libgnat/a-ststbo.ads,
libgnat/a-ststun.adb, libgnat/a-ststun.ads,
libgnat/a-stteou.ads, libgnat/s-aoinar.ads,
libgnat/s-aomoar.ads, libgnat/s-atopex.ads,
libgnat/s-putaim.adb, libgnat/s-putaim.ads,
libgnat/s-putima.adb, libgnat/s-putima.ads: Remove pragma
Ada_2020, now redundant.

4 years ago[Ada] Wrong accessibility on 'Access of formal in call
Justin Squirek [Thu, 18 Jun 2020 18:15:47 +0000 (14:15 -0400)]
[Ada] Wrong accessibility on 'Access of formal in call

gcc/ada/

* exp_ch6.adb (Expand_Call_Helper): Modify addition of the extra
accessibility parameter to take into account the extra
accessibility of formals within the calling subprogram.

4 years ago[Ada] Bug in Enum_Subtype'Image in Ada 2020 mode
Bob Duff [Thu, 18 Jun 2020 13:10:33 +0000 (09:10 -0400)]
[Ada] Bug in Enum_Subtype'Image in Ada 2020 mode

gcc/ada/

* exp_imgv.adb (Expand_Image_Attribute): Add Root_Type, so
constrained subtypes work.

4 years ago[Ada] Refactor pragma argument getters
Ghjuvan Lacambre [Thu, 18 Jun 2020 08:29:35 +0000 (10:29 +0200)]
[Ada] Refactor pragma argument getters

gcc/ada/

* exp_prag.adb (Arg1, Arg2, Arg3): Removed.
(Arg_N): New function.

4 years ago[Ada] AI12-0383 Renaming values
Arnaud Charlet [Mon, 15 Jun 2020 07:51:52 +0000 (03:51 -0400)]
[Ada] AI12-0383 Renaming values

gcc/ada/

* sem_ch8.adb (Analyze_Object_Renaming): Allow values in Ada
2020 mode.

4 years ago[Ada] AI12-0377 View conversions and out parameters revisited
Arnaud Charlet [Wed, 17 Jun 2020 08:00:47 +0000 (04:00 -0400)]
[Ada] AI12-0377 View conversions and out parameters revisited

gcc/ada/

* sem_res.adb (Resolve_Actuals): Refine 6.4.1 rules as per
AI12-0377.

4 years ago[Ada] Ada2020: wording of 'Image messages
Bob Duff [Sat, 13 Jun 2020 16:38:00 +0000 (12:38 -0400)]
[Ada] Ada2020: wording of 'Image messages

gcc/ada/

* errout.ads, errout.adb (Error_Msg_Ada_2020_Feature): New
procedure analogous to Error_Msg_Ada_2012_Feature.
* sem_attr.adb (Analyze_Image_Attribute): Use
Error_Msg_Ada_2012_Feature and Error_Msg_Ada_2020_Feature to
indicate that Object'Image is allowed in Ada 2012, and that
'Image is allowed for any type in Ada 2020.

4 years ago[Ada] Unbounded string overriding control
Dmitriy Anisimkov [Thu, 21 May 2020 12:15:40 +0000 (18:15 +0600)]
[Ada] Unbounded string overriding control

gcc/ada/

* libgnat/a-strunb.adb (Sum, Mul, Saturated_Sum, Saturated_Mul):
New routines.  Use them when resulting string size more that
length of the strings in parameters.
(Unbounded_Slice): Use "- 1" instead of "+ 1" in opposite side
of condition to avoid overflow.
* libgnat/a-strunb__shared.adb (Sum, Mul): New routines.
(Allocate): New routine with 2 parameters.  Use routine above
when resulting string size more that length of the strings in
parameters.
(Aligned_Max_Length): Do not try to align to more than Natural'Last.
(Unbounded_Slice): Use "- 1" instead of "+ 1" in opposite side
of condition to avoid overflow.

4 years ago[Ada] Remove disabled code
Arnaud Charlet [Wed, 17 Jun 2020 08:41:44 +0000 (10:41 +0200)]
[Ada] Remove disabled code

gcc/ada/

* sem_attr.adb (Resolve_Attribute): Remove dead code.

4 years ago[Ada] Use membership tests in front-end
Arnaud Charlet [Sat, 13 Jun 2020 15:33:04 +0000 (11:33 -0400)]
[Ada] Use membership tests in front-end

gcc/ada/

* aspects.adb, atree.adb, atree.ads, checks.adb, contracts.adb,
einfo.adb, errout.adb, exp_aggr.adb, exp_attr.adb, exp_cg.adb,
exp_ch11.adb, exp_ch2.adb, exp_ch3.adb, exp_ch4.adb,
exp_ch5.adb, exp_ch6.adb, exp_ch7.adb, exp_ch8.adb, exp_ch9.adb,
exp_dbug.adb, exp_disp.adb, exp_intr.adb, exp_pakd.adb,
exp_prag.adb, exp_put_image.adb, exp_smem.adb, exp_tss.adb,
exp_unst.adb, exp_util.adb, freeze.adb, ghost.adb, gnat1drv.adb,
inline.adb, lib-writ.adb, lib-xref-spark_specific.adb,
lib-xref.adb, namet.adb, namet.ads, nlists.adb, par-ch10.adb,
par-ch2.adb, par-ch3.adb, par-ch4.adb, par-ch5.adb, par-ch6.adb,
par-prag.adb, par-util.adb, par_sco.adb, pprint.adb,
repinfo.adb, restrict.adb, rtsfind.adb, scil_ll.adb, sem.adb,
sem_aggr.adb, sem_attr.adb, sem_aux.adb, sem_cat.adb,
sem_ch10.adb, sem_ch11.adb, sem_ch12.adb, sem_ch13.adb,
sem_ch3.adb, sem_ch4.adb, sem_ch5.adb, sem_ch6.adb, sem_ch7.adb,
sem_ch8.adb, sem_ch9.adb, sem_dim.adb, sem_disp.adb,
sem_dist.adb, sem_elab.adb, sem_elim.adb, sem_eval.adb,
sem_intr.adb, sem_mech.adb, sem_prag.adb, sem_res.adb,
sem_scil.adb, sem_type.adb, sem_util.adb, sem_warn.adb,
sinfo.adb, sinfo.ads, sprint.adb, styleg.adb, tbuild.adb,
treepr.adb (Nkind_In, Nam_In, Ekind_In): Removed, replaced by
membership tests.

4 years ago[Ada] AI12-0194: Language-defined aspects and entry bodies
Gary Dismukes [Tue, 16 Jun 2020 20:08:34 +0000 (16:08 -0400)]
[Ada] AI12-0194: Language-defined aspects and entry bodies

gcc/ada/

* sem_prag.adb (Analyze_Pragma, Pragma_Max_Entry_Queue_Length):
Refine error message to indicate that the pragma must apply to
an entry declaration, not just an entry.

4 years ago[Ada] Spurious error in generic dispatching constructor
Javier Miranda [Tue, 16 Jun 2020 17:49:04 +0000 (13:49 -0400)]
[Ada] Spurious error in generic dispatching constructor

gcc/ada/

* exp_ch6.adb (Make_Build_In_Place_Iface_Call_In_Allocator):
Revert previous patch, and add a missing type conversion to
displace the pointer to the allocated object to reference the
target dispatch table.

4 years ago[Ada] Ada2020: AI12-0027 Access values and unaliased component
Javier Miranda [Tue, 16 Jun 2020 09:28:54 +0000 (05:28 -0400)]
[Ada] Ada2020: AI12-0027 Access values and unaliased component

gcc/ada/

* sem_res.adb (Resolve_Actuals): Restore restrictive check on
view conversions which required matching value of
Has_Aliased_Components of formals and actuals. Required to avoid
the regression of ACATS b460005.

4 years ago[Ada] Remove obsolete special case in Switch_View
Eric Botcazou [Tue, 16 Jun 2020 07:58:09 +0000 (09:58 +0200)]
[Ada] Remove obsolete special case in Switch_View

gcc/ada/

* sem_ch12.adb (Instantiate_Package_Body): Add commentary for a
nesting issue with parent handling and private view switching.
(Switch_View): Do not skip specific private-dependent subtypes.

4 years ago[Ada] x86-lynx178elf: use a-numaux.ads instead of a-numaux__libc-x86.ads
Patrick Bernardi [Tue, 16 Jun 2020 00:42:31 +0000 (20:42 -0400)]
[Ada] x86-lynx178elf: use a-numaux.ads instead of a-numaux__libc-x86.ads

gcc/ada/

* Makefile.rtl: Remove X86_TARGET_PAIRS for x86-lynx178elf.

4 years ago[Ada] Warnings on overloays involving generic In_Parameters
Ed Schonberg [Mon, 15 Jun 2020 21:40:26 +0000 (17:40 -0400)]
[Ada] Warnings on overloays involving generic In_Parameters

gcc/ada/

* sem_ch13.adb (Analyze_Address_Specification_Clause): Do not
emit a warning when a constant declaration in a generic unit
overlays a generic In_Parameter.

4 years ago[Ada] AI12-0382: Loosen type-invariant overriding requirement of AI12-0042
Gary Dismukes [Mon, 15 Jun 2020 21:14:14 +0000 (17:14 -0400)]
[Ada] AI12-0382: Loosen type-invariant overriding requirement of AI12-0042

gcc/ada/

* sem_ch3.adb (Check_Abstract_Overriding): Remove Scope
comparison test from test related to initial implementation of
AI12-0042, plus remove the related ??? comment.
(Derive_Subprogram): Add test requiring that the type extension
appear in the visible part of its enclosing package when
checking the overriding requirement of 7.3.2(6.1/4), as
clarified by AI12-0382.

4 years ago[Ada] Add range check for GNATprove on 'Pos to Long_Integer conversion
Piotr Trojanek [Fri, 12 Jun 2020 17:06:51 +0000 (19:06 +0200)]
[Ada] Add range check for GNATprove on 'Pos to Long_Integer conversion

gcc/ada/

* exp_spark.adb (Expand_SPARK_N_Attribute_Reference) Extend
existing workaround to 'Pos.

4 years ago[Ada] Ada2020: AI12-0304 Put_Image attrs of lang-def types
Bob Duff [Fri, 12 Jun 2020 22:24:52 +0000 (18:24 -0400)]
[Ada] Ada2020: AI12-0304 Put_Image attrs of lang-def types

gcc/ada/

* libgnat/s-rannum.ads, libgnat/s-rannum.adb: Add Put_Image.
This will be inherited by the language-defined packages
Ada.Numerics.Discrete_Random and Ada.Numerics.Float_Random.
* libgnat/a-convec.ads, libgnat/a-convec.adb: Add Put_Image.
* libgnat/s-putima.ads: Add pragma Preelaborate, so this can be
imported into containers packages.
* libgnat/s-putima.adb: Move Digit to private part; otherwise
reference to Base is illegal in Preelaborate generic.
* exp_put_image.adb (Build_Record_Put_Image_Procedure): Use the
base type.

4 years agoUse vec::reserve before vec_safe_grow_cleared is called
Martin Liska [Fri, 24 Jul 2020 12:33:27 +0000 (14:33 +0200)]
Use vec::reserve before vec_safe_grow_cleared is called

gcc/ChangeLog:

PR lto/45375
* symbol-summary.h: Call vec_safe_reserve before grow is called
in order to grow to a reasonable size.
* vec.h (vec_safe_reserve): Add missing function for vl_ptr
type.

4 years agofortran/openmp.c - silence static analyzer warning
Tobias Burnus [Mon, 27 Jul 2020 07:12:15 +0000 (09:12 +0200)]
fortran/openmp.c - silence static analyzer warning

gcc/fortran/ChangeLog:

* openmp.c (gfc_resolve_omp_directive): Remove NULL check
for clauses in EXEC_OMP_CRITICAL as it no longer can be NULL.

4 years agogcc.dg/tree-ssa/vector-4.c: Adjust for mmix.
Hans-Peter Nilsson [Mon, 27 Jul 2020 01:39:16 +0000 (03:39 +0200)]
gcc.dg/tree-ssa/vector-4.c: Adjust for mmix.

Again, the variables are "privatized" using ASM_PN_FORMAT for MMIX (but
apparently not for other targets) and the line to match looks like:
  D.1427 = VEC_PERM_EXPR <a::0, b::1, { 0, 4, 1, 5 }>;

gcc/testsuite:
* gcc.dg/tree-ssa/vector-4.c: Adjust for mmix.

4 years agogcc.dg/tree-ssa/ssa-dse-26.c: Adjust for mmix.
Hans-Peter Nilsson [Mon, 27 Jul 2020 01:11:46 +0000 (03:11 +0200)]
gcc.dg/tree-ssa/ssa-dse-26.c: Adjust for mmix.

The variables are "localized" using ASM_PN_FORMAT for MMIX and the
lines to match look like:
  Deleted dead store: y::4 = y;
  Deleted dead store: x::3 = x;

gcc/testsuite:
* gcc.dg/tree-ssa/ssa-dse-26.c: Adjust for mmix.

4 years agogcc.dg/tree-ssa/ssa-dom-cse-2.c: xfail scan for mmix.
Hans-Peter Nilsson [Mon, 27 Jul 2020 00:39:34 +0000 (02:39 +0200)]
gcc.dg/tree-ssa/ssa-dom-cse-2.c: xfail scan for mmix.

Looking at the dump and the test, I guess all "64-bit targets" fail
the test for the reasons seen in the comment just above the dg-final,
whose last two lines make it to the patch context.  Maybe the xfail
target list can be shortened by removing most targets and use just
"lp64".  That doesn't cover it passing on x86_64 and s390x-zarch
though.

gcc/testsuite:
* gcc.dg/tree-ssa/ssa-dom-cse-2.c: xfail scan for mmix.

4 years agoDaily bump.
GCC Administrator [Mon, 27 Jul 2020 00:16:20 +0000 (00:16 +0000)]
Daily bump.

4 years agogcc.dg/tree-ssa/reassoc-20.c: Adjust for mmix.
Hans-Peter Nilsson [Mon, 27 Jul 2020 00:07:20 +0000 (02:07 +0200)]
gcc.dg/tree-ssa/reassoc-20.c: Adjust for mmix.

The expression of interest looks like "e_5 = a::0_1 + b::1_2;" for
mmix-knuth-mmixware, while other targets have a "." instead of the
"::".  ISTM the most useful change here is not to disable the test,
but to add an optional character in the matched expression to match
the "extra" ":".  Also checked cris-elf to assert that the expression
still passes for an "ordinary" ELF target.

gcc/testsuite:
* gcc.dg/tree-ssa/reassoc-20.c: Adjust for mmix.

4 years agommix: Don't turn off .hidden support.
Hans-Peter Nilsson [Sun, 26 Jul 2020 22:08:54 +0000 (00:08 +0200)]
mmix: Don't turn off .hidden support.

In 2012 e2769e908a915ebbc/r192344, I added the following lines, that I
now delete.  I've changed my mind: ELF-related targets based on gas,
that support only static linking, have .hidden "for free", regardless
of the visibility of the hidden object in the linked executable.  No
regressions for mmix-knuth-mmixware and "fixes":

FAIL: gcc.dg/torture/pr94947-1.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  (test for excess errors)
Excess errors:
lto1: warning: visibility attribute not supported in this configuration; ignored [-Wattributes]

...a warning which is emitted for "all" LTO tests (of which most have
warnings filtered out); LTO "thinks" all supported targets have
.hidden support.

gcc:
* configure.ac (out-of-tree linker .hidden support): Don't turn off
for mmix-knuth-mmixware.
* configure: Regenerate.

4 years agoc++: Add testcase for [PR79504]
Patrick Palka [Sun, 26 Jul 2020 17:37:26 +0000 (13:37 -0400)]
c++: Add testcase for [PR79504]

We successfully compile this testcase ever since r8-5270.

gcc/testsuite/ChangeLog:

PR c++/79504
* g++.dg/cpp0x/decltype79.C: New test.

4 years agors6000: add option -mblock-ops-unaligned-vsx
Aaron Sawdey [Fri, 24 Jul 2020 19:13:48 +0000 (14:13 -0500)]
rs6000: add option -mblock-ops-unaligned-vsx

This option is mostly being added to provide -mno-block-ops-unaligned-vsx.
The default is set the same as -mefficient-unaligned-vsx. This option will
control the use of unaligned VSX loads/stores in the inline expansion
of memcpy() and memmove(). The use case for this would be if you're
compiling code that is doing a memcpy to memory mapped device memory
that is cache-inhibited. On some powerpc processors this requires the
unaligned vsx ops to be emulated by the kernel which is very slow.

gcc/ChangeLog:

* config/rs6000/rs6000.c (rs6000_option_override_internal):
Set the default value for -mblock-ops-unaligned-vsx.
* config/rs6000/rs6000.opt: Add -mblock-ops-unaligned-vsx.
* doc/invoke.texi: Document -mblock-ops-unaligned-vsx.

4 years agolibgfortran: Skip integer-kind=16 check for amdgcn
Tobias Burnus [Sun, 26 Jul 2020 05:20:24 +0000 (07:20 +0200)]
libgfortran: Skip integer-kind=16 check for amdgcn

libgfortran/ChangeLog:

PR target/96306
* configure.ac: Add LIBGOMP_CHECKED_INT_KINDS and
LIBGOMP_CHECKED_REAL_KINDS and use it for to skip
integer kind=16 checks for amdgcn.
* Makefile.am (kinds.h, selected_int_kind.inc,
selected_real_kind.inc): Pass them on.
* mk-kinds-h.sh: Takes to-be-check kinds as argument.
* mk-sik-inc.sh: Likewise.
* mk-srk-inc.sh: Likewise.
* Makefile.in: Regenerate.
* configure: Regenerate.

4 years agogcc.dg/tree-ssa/forwprop-36.c: Adjust for mmix
Hans-Peter Nilsson [Sun, 26 Jul 2020 01:33:15 +0000 (03:33 +0200)]
gcc.dg/tree-ssa/forwprop-36.c: Adjust for mmix

The label of interest here is "b.0_2" for
e.g. x86_64-pc-linux-gnu but "b::1_2" for mmix-knuth-mmixware.
The test seems to be of some interest for mmix (hey, gcc
open-coded 128-bit integer support behind my back!) so I didn't
want to just disable it.  I also didn't want to obscure the
matching pattern by generalizing it, so instead I added a
separate matching pattern.

gcc/testsuite:
* gcc.dg/tree-ssa/forwprop-36.c: Adjust for mmix.

4 years agogcc.dg/torture/pr59330.c: Disable for mmix
Hans-Peter Nilsson [Sun, 26 Jul 2020 00:44:02 +0000 (02:44 +0200)]
gcc.dg/torture/pr59330.c: Disable for mmix

With the dejagnu status-wrapper, there's a reference to write in
each executable, which for mmix in newlib has a reference to a
variable defined in open, which for mmix in newlib has a
reference to sprintf (oops!) and the dependency-chain goes on;
ad finitum there's a reference to malloc, which in default
newlib is colocated with free; the same file
newlib/libc/stdlib/malloc.c.

Not being compiled with -ffunction-sections, they're emitted in
the same section (.text) and thus inseparable: you can't
override just one of them as in this test, or else you'll get:

<X>/pre/mmix/bin/ld: <X>/gccobj/mmix/./newlib/libc.a(lib_a-malloc.o): in function `free':
<X>/gcc/newlib/libc/stdlib/malloc.c:169: multiple definition of `free'; /tmp/ccvRA0zb.o:(.text+0x0): first defined here
collect2: error: ld returned 1 exit status
compiler exited with status 1
FAIL: gcc.dg/torture/pr59330.c   -O0  (test for excess errors)

I'm using a dg-skip-if here instead of starting a hardly
scalable dg-do target selector.  I'm not keying on
effective-target unwrapped because the dependency-chain is
target-specific rather than dejagnu status-wrapper-specific.

gcc/testsuite:
* gcc.dg/torture/pr59330.c: Disable for mmix.

4 years agoDaily bump.
GCC Administrator [Sun, 26 Jul 2020 00:16:21 +0000 (00:16 +0000)]
Daily bump.

4 years agoconfig/mmix/mmix.c (TARGET_ASM_OUTPUT_IDENT): Override.
Hans-Peter Nilsson [Sat, 25 Jul 2020 21:25:09 +0000 (23:25 +0200)]
config/mmix/mmix.c (TARGET_ASM_OUTPUT_IDENT): Override.

Funny that default_asm_output_ident_directive isn't the default...
Anyway, since dot-pseudos like .ident are treated as comments by
mmixal, there's nothing lost compatibilitywise by supporting it.
If mmix-knuth-mmixware had included elfos.h this'd have been the
default.  There might be enough reason to do that; relocatable objects
are ELF but (by default) links to produce mmo.  Fixes
c-c++-common/ident-1b.c and 2b in C and C++ testing.  Committed.

gcc:
* config/mmix/mmix.c (TARGET_ASM_OUTPUT_IDENT): Override the default
with default_asm_output_ident_directive.

4 years agoC++, testsuite: Adjust pure-virtual1.C options for Darwin.
Iain Sandoe [Sat, 25 Jul 2020 20:42:55 +0000 (21:42 +0100)]
C++, testsuite: Adjust pure-virtual1.C options for Darwin.

Darwin's static linker expects, by default, that all linkage will
be satisfied (even for weak items).  This allows the two-level
namespace to work even for weak cases.

However, there's an option to make it behave in a similar manner
to ELF.  This is needed for the pure-virtual1.C testcase to pass
on Darwin.

gcc/testsuite/ChangeLog:

* g++.dg/abi/pure-virtual1.C: Add dynamic_lookup option
for Darwin.

4 years agoFix PR c++/96310 - Ignoring -Wnonnull via pragma gcc diagnostics still produces an...
Martin Sebor [Sat, 25 Jul 2020 20:21:47 +0000 (14:21 -0600)]
Fix PR c++/96310 - Ignoring -Wnonnull via pragma gcc diagnostics still produces an unwanted note.

gcc/c-family/ChangeLog:
PR c++/96310
* c-common.c (check_nonnull_arg): Print note only when warning was
issued.

4 years agoamdgcn: Enable TImode
Andrew Stubbs [Sat, 25 Jul 2020 14:02:52 +0000 (15:02 +0100)]
amdgcn: Enable TImode

This enables types __int128 et al for move, add, subtract, and logical
operations.  At least shift, rotate, multiple, divide, and modulus are broken
so we can expect some test failures.

This is required now because libgomp no longer builds without __int128.

An additional patch will be required to unbreak the libgfortran build.

gcc/ChangeLog:

* config/gcn/gcn.c (gcn_scalar_mode_supported_p): New function.
(TARGET_SCALAR_MODE_SUPPORTED_P): New define.

4 years agoDaily bump.
GCC Administrator [Sat, 25 Jul 2020 00:16:22 +0000 (00:16 +0000)]
Daily bump.

4 years agoaix: Support GCC64 for AIX 7.1.
David Edelsohn [Fri, 24 Jul 2020 19:05:42 +0000 (15:05 -0400)]
aix: Support GCC64 for AIX 7.1.

gcc/ChangeLog:

2020-07-24  David Edelsohn  <dje.gcc@gmail.com>
    Clement Chigot  <clement.chigot@atos.net>

* config.gcc (powerpc-ibm-aix7.1): Use t-aix64 and biarch64 for
cpu_is_64bit.
* config/rs6000/aix71.h (ASM_SPEC): Remove aix64 option.
(ASM_SPEC32): New.
(ASM_SPEC64): New.
(ASM_CPU_SPEC): Remove vsx and altivec options.
(CPP_SPEC_COMMON): Rename from CPP_SPEC.
(CPP_SPEC32): New.
(CPP_SPEC64): New.
(CPLUSPLUS_CPP_SPEC): Rename to CPLUSPLUS_CPP_SPEC_COMMON..
(TARGET_DEFAULT): Use 64 bit mask if BIARCH.
(LIB_SPEC_COMMON): Rename from LIB_SPEC.
(LIB_SPEC32): New.
(LIB_SPEC64): New.
(LINK_SPEC_COMMON): Rename from LINK_SPEC.
(LINK_SPEC32): New.
(LINK_SPEC64): New.
(STARTFILE_SPEC): Add 64 bit version of crtcxa and crtdbase.
(ASM_SPEC): Define 32 and 64 bit alternatives using DEFAULT_ARCH64_P.
(CPP_SPEC): Same.
(CPLUSPLUS_CPP_SPEC): Same.
(LIB_SPEC): Same.
(LINK_SPEC): Same.
(SUBTARGET_EXTRA_SPECS): Add new 32/64 specs.
* config/rs6000/aix72.h (TARGET_DEFAULT): Use 64 bit mask if BIARCH.
* config/rs6000/defaultaix64.h: Delete.

4 years agors6000: Remove -mpower10 option (PR95907)
Segher Boessenkool [Fri, 24 Jul 2020 23:12:08 +0000 (23:12 +0000)]
rs6000: Remove -mpower10 option (PR95907)

The only way to enable or disable Power10 insns (ISA 3.1 insns) should
be via the -mcpu= switch.  This patch disables the -mpower10 options the
same way the -mdirect-move switch is neutered already.  That is not an
ideal way, but it works, it is not the first, and doing it properly is
more work, and will happen later.

2020-07-24  Segher Boessenkool  <segher@kernel.crashing.org>

* config/rs6000/rs6000.opt: Delete -mpower10.

gcc/testsuite/
* gcc.target/powerpc/pr95907.c: New.

4 years agoc-c++-common/pr56493.c: Allow ":" in label, for mmix.
Hans-Peter Nilsson [Fri, 24 Jul 2020 22:05:42 +0000 (00:05 +0200)]
c-c++-common/pr56493.c: Allow ":" in label, for mmix.

No dots in labels for MMIX: internal labels instead contain ":".

gcc/testsuite:

* c-c++-common/pr56493.c: Allow ":" in label, for mmix.

4 years agotestsuite: Adjust patchable_function tests for mmix.
Hans-Peter Nilsson [Fri, 24 Jul 2020 21:50:05 +0000 (23:50 +0200)]
testsuite: Adjust patchable_function tests for mmix.

There's no reason anyone would want to use the "patchable function"
feature for MMIX and also no reason to exclude those tests.  For MMIX,
the NOP equivalent is SWYM ("swymming" is a healthy exercise).
Text-wise, making the tests pass by adjusting the regexp, is shorter,
and it seems unlikely to both appear as a mnemonic for other targets
*and* being emitted in uppercase.

gcc/testsuite:

* c-c++-common/patchable_function_entry-decl.c,
c-c++-common/patchable_function_entry-default.c,
c-c++-common/patchable_function_entry-definition.c: Adjust for mmix.

4 years agoAdd testcase to show kernel issue got fixed by pr95237 [PR96192]
Sunil K Pandey [Fri, 24 Jul 2020 21:08:41 +0000 (14:08 -0700)]
Add testcase to show kernel issue got fixed by pr95237 [PR96192]

This test case, extracted from PR 95645, was failing because alignment
of local long long variable got lowered from 8 bytes to 4 bytes in
adjust alignment pass, which triggered assert failure.

This test case passes now because PR 95237 fix only allows lowering of
alignment of local variables in the front end.  As a result, alignment
of local long long variable no longer gets lowered in adjust alignment
pass.

gcc/testsuite/ChangeLog:

PR target/96192
* c-c++-common/pr96192-1.c: New test.

4 years agoadd offload target to testname for pass/fail message
Alexandre Oliva [Fri, 24 Jul 2020 18:38:42 +0000 (15:38 -0300)]
add offload target to testname for pass/fail message

Offload tests that scan dump files may run multiple times, once per
offload target, but the test result messages do not mention the
offload target, so we may seem to have repeated results.  Fixed by
modifying the test name so that it contains the offload target name.

Co-Authored-By: Thomas Schwinge <thomas@codesourcery.com>
for  gcc/testsuite/ChangeLog

* lib/scanoffload.exp (scoff-testname, scoff-adjust): New.
(scoff): Call them.

4 years agorevamp intelmic-mkoffload aux dump names
Alexandre Oliva [Fri, 24 Jul 2020 18:38:40 +0000 (15:38 -0300)]
revamp intelmic-mkoffload aux dump names

Rework intelmic-mkoffload into the new aux and dump file naming
semantics.  Obey -save-temps.

Co-Authored-By: Thomas Schwinge <thomas@codesourcery.com>
for  gcc/ChangeLog

* config/i386/intelmic-mkoffload.c
(generate_target_descr_file): Use dumppfx for save_temps
files.  Pass -dumpbase et al down to the compiler.
(generate_target_offloadend_file): Likewise.
(generate_host_descr_file): Likewise.
(prepare_target_image): Likewise.  Move out_obj_filename
setting...
(main): ... here.  Detect -dumpbase, set dumppfx too.

4 years ago[PR96230] some -dumpbase-ext fixes
Alexandre Oliva [Fri, 24 Jul 2020 18:38:38 +0000 (15:38 -0300)]
[PR96230] some -dumpbase-ext fixes

The initial bug report was that compiling (-c) with -dumpbase ""
-dumpbase-ext .<ext> crashes the driver.

The verification of -dumpbase-ext against -dumpbase doesn't cover the
case in which -dumpbase activates backward-compatibility mode.

I added a test for that, and for -dumpbase-ext without -dumpbase,
trying to make it work in a sensible way, as if applied to the default
-dumpbase for each file.  It turned out that this made for too much
complexity in dealing with suffixes derived from input filenames, so I
gave that up and returned to discarding -dumpbase-ext as documented,
ending up with a change identical to that in the original bug report.

I also thought I caught an off-by-one error in the initial
verification, that caused dumpbase_ext to be discarded if it was
identical to the specified dumpbase, but that turned out to be
intentional as well, so I put in comments and a test to reflect it.

Finally, an earlier version of the newly-added tests used "$var.ext"
in an expected output list, which showed me the handling of string
expansion was incorrect.  Reworked the expr into an eval to make that
work, and, absent any reliance on post-eval adjustments to so-expanded
output names, I arranged for the adjustments to be skipped after eval.

Co-Authored-By: "Zhanghaijian (A)" <z.zhanghaijian@huawei.com>
for  gcc/ChangeLog

PR driver/96230
* gcc.c (process_command): Adjust and document conditions to
reset dumpbase_ext.

for  gcc/testsuite/ChangeLog

PR driver/96230
* gcc.misc-tests/outputs.exp: Add tests with -dumpbase-ext,
with identical -dumpbase, with -dumpbase "", and without any
-dumpbase.
(outest): Fix "" expansion in expected outputs, skip
adjustments.

4 years ago[PR95720] protect gluefile and wrap_flags with -Wl too
Alexandre Oliva [Fri, 24 Jul 2020 18:38:35 +0000 (15:38 -0300)]
[PR95720] protect gluefile and wrap_flags with -Wl too

The testglue object file gets interpreted as another input file,
changing the dump and aux output names in GCC unless it is protected
by -Wl, like board file-named extra inputs.

Refactor the code that modifies the board settings so that it can be
used to modify regular variables as well, and do so.

for  gcc/testsuite/ChangeLog

PR testsuite/95720
* lib/gcc-defs.exp (gcc_adjust_linker_flags_list): Split out of...
(gcc_adjust_linker_flags): ... this.  Protect gluefile and
wrap_flags.
* gcc.misc-tests/outputs.exp: Use gcc_adjust_linker_flags_list.

4 years agoPR 93567, G edit descriptor uses E instead of F editing in rounding mode UP.
Dominique d'Humieres [Fri, 24 Jul 2020 18:27:53 +0000 (20:27 +0200)]
PR 93567, G edit descriptor uses E instead of F editing in rounding mode UP.

The switch between FMT_E and FMT_F is based on the absolute value.
Set r=0 for rounding toward zero and r = 1 otherwise.
If (exp_d - m) == 1 there is no rounding needed.

libgfortran/ChangeLog:

PR fortran/93567
* io/write_float.def (determine_en_precision): Fix switch between
FMT_E and FMT_F.

gcc/testsuite/ChangeLog:

PR fortran/93567
* gfortran.dg/round_3.f08: Add test cases.

4 years agoPR 93592 - Invalid UP/DOWN rounding with EN descriptor.
Dominique d'Humieres [Fri, 24 Jul 2020 18:07:12 +0000 (20:07 +0200)]
PR 93592 - Invalid UP/DOWN rounding with EN descriptor.

The fix is obvious (I have added a comment). The tests are probably
an overkill, but it does not hurt.

libgfortran/ChangeLog:

PR fortran/93592
* io/write_float.def (build_float_string): Do not reset
  nbefore for FMT_F and FMT_EN.

gcc/testsuite/ChangeLog:

PR fortran/93592
* gfortran.dg/fmt_en.f90: Adjust test.
* gfortran.dg/fmt_en_rd.f90: New test.
* gfortran.dg/fmt_en_rn.f90: New test.
* gfortran.dg/fmt_en_ru.f90: New test.
* gfortran.dg/fmt_en_rz.f90: New test.

4 years agoc++: Add testcase for [PR81339]
Patrick Palka [Fri, 24 Jul 2020 18:31:36 +0000 (14:31 -0400)]
c++: Add testcase for [PR81339]

We correctly reject this testcase since r11-434, i.e. since the fix for
PR c++/57943.

gcc/testsuite/ChangeLog:

PR c++/81339
* g++.dg/cpp0x/decltype78.C: New test.

4 years agoiDefine TARGET_OFFLOAD_OPTIONS for AArch64
Matthias Klose [Fri, 24 Jul 2020 14:17:44 +0000 (16:17 +0200)]
iDefine TARGET_OFFLOAD_OPTIONS for AArch64

2020-07-24  Matthias Klose  <doko@ubuntu.com>

* config/aarch64/aarch64.c (+aarch64_offload_options,
TARGET_OFFLOAD_OPTIONS): New.

4 years agoi386: Emit mfence_sse2 for -Os [PR95750]
Uros Bizjak [Fri, 24 Jul 2020 13:59:38 +0000 (15:59 +0200)]
i386: Emit mfence_sse2 for -Os [PR95750]

2020-07-24  Uroš Bizjak  <ubizjak@gmail.com>

gcc/ChangeLog:
PR target/95750
* config/i386/sync.md (mmem_thread_fence): Emit mfence_sse2 for -Os.

4 years ago[testsuite] Unset 'offload_target' after use
Thomas Schwinge [Wed, 1 Jul 2020 10:33:59 +0000 (12:33 +0200)]
[testsuite] Unset 'offload_target' after use

..., so that we don't leak this into '*.exp' files running later.

This is relevant after commit efc16503ca10bc0e934e0bace5777500e4dc757a "handle
dumpbase in offloading, adjust testsuite" -- I was confused why in a
(simplified) testing sequence as follows:

  default 'libgomp.c/c.exp'
  default 'libgomp.oacc-c/c.exp'
  '-m32' 'libgomp.c/c.exp'
  '-m32' 'libgomp.oacc-c/c.exp'

..., the "'-m32' 'libgomp.c/c.exp'" variant would not execute any offloading
dump scanning.  The reason is that the "default 'libgomp.oacc-c/c.exp'" variant
ends with 'offload_target=disable' set, so that's what the "'-m32'
'libgomp.c/c.exp'" variant would then see, in particular
'gcc/testsuite/lib/scanoffload.exp:scoff'.

libgomp/
* testsuite/libgomp.oacc-c++/c++.exp: Unset 'offload_target' after
use.
* testsuite/libgomp.oacc-c/c.exp: Likewise.
* testsuite/libgomp.oacc-fortran/fortran.exp: Likewise.

4 years ago[testsuite] Fix TCL syntax error in 'scan-dump-dem-not'
Thomas Schwinge [Tue, 30 Jun 2020 05:18:19 +0000 (07:18 +0200)]
[testsuite] Fix TCL syntax error in 'scan-dump-dem-not'

    ERROR: [...]: error executing dg-final: missing close-bracket

Bug introduced in commit 2ef1bce664881cd59dac7db6c3f3b5709d858bfe (r188996),
long ago.

gcc/testsuite/
* lib/scandump.exp (scan-dump-dem-not): Fix TCL syntax error.

4 years agoaarch64: add PAC-RET protection to libitm sjlj.S
Szabolcs Nagy [Thu, 16 Jul 2020 15:39:23 +0000 (16:39 +0100)]
aarch64: add PAC-RET protection to libitm sjlj.S

_ITM_beginTransaction is a 'returns_twice' function that saves x30
on the stack as part of gtm_jmpbuf (that is passed down to
GTM_begin_transaction), but the saved x30 is also used for return.

The return path should be protected so we don't leave an
  ldp x29, x30, [sp]
  ret
gadget in the code, so x30 is signed on function entry. This
exposes the signed address in the gtm_jmpbuf too. The jmpbuf does
not need a signed address since GTM_longjmp uses
  ldp x29, x30, [x1]
  br x30
and with BTI there is a BTI j at the _ITM_beginTransaction call site
where this jump returns. Using PAC does not hurt: the gtm_jmpbuf is
internal to libitm and its layout is only used by sjlj.S so the
signed address does not escape. Saving signed x30 into gtm_jmpbuf
provides a bit of extra protection, but more importantly it allows
adding the PAC-RET support without changing the existing code much.

In theory bti and pac-ret protection can be added unconditionally
since the instructions are in the nop space, in practice they
can cause trouble if some tooling does not understand the gnu
property note (e.g. old binutils) or some unwinder or debugger
does not understand the new dwarf op code used for pac-ret (e.g
old gdb). So the code is written to only support branch-protection
according to the code generation options.

libitm/ChangeLog:

* config/aarch64/sjlj.S: Add conditional pac-ret protection.

4 years agoaarch64: add PAC GNU property note to libgcc lse.S
Szabolcs Nagy [Thu, 16 Jul 2020 15:26:10 +0000 (16:26 +0100)]
aarch64: add PAC GNU property note to libgcc lse.S

This note is not used anywhere currently but it is supposed to mark
objects if the return address is protected with PAC on the stack.
Since lse.S only has leaf functions the return address is never
saved on the stack so we can add the note.

The note is only added if pac-ret is enabled because it can cause
problems with old linkers and we don't have checks for that. This
can be changed later to be unconditional, for now it is consistent
with how gcc generates the notes.

libgcc/ChangeLog:

* config/aarch64/lse.S: Add PAC property note.

4 years agoRestrict PR middle-end/95886 x86 test to !ia32
H.J. Lu [Fri, 24 Jul 2020 02:14:06 +0000 (19:14 -0700)]
Restrict PR middle-end/95886 x86 test to !ia32

Since gcc.target/i386/memcpy-pr95886.c requires 64-bit register, restrict
it to !ia32.

PR middle-end/95886
* gcc.target/i386/memcpy-pr95886.c: Restrict test to !ia32.

4 years agoDaily bump.
GCC Administrator [Fri, 24 Jul 2020 00:16:20 +0000 (00:16 +0000)]
Daily bump.

4 years agolibgo: add AIX FAT libraries support
Clément Chigot [Thu, 16 Jul 2020 09:29:49 +0000 (11:29 +0200)]
libgo: add AIX FAT libraries support

AIX-style libraries contains both 32 and 64 bit shared objects.
This patch follows the adding of FAT libraries support in other gcc
libraries (libgcc, listdc++, etc).

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/242957