i386: Add pass_remove_partial_avx_dependency

With -mavx, for

$ cat foo.i
extern float f;
extern double d;
extern int i;

void
foo (void)
{
  d = f;
  f = i;
}

we need to generate

vxorp[ds] %xmmN, %xmmN, %xmmN
...
vcvtss2sd f(%rip), %xmmN, %xmmX
...
vcvtsi2ss i(%rip), %xmmN, %xmmY

to avoid partial XMM register stall.  This patch adds a pass to generate
a single

vxorps %xmmN, %xmmN, %xmmN

at entry of the nearest dominator for basic blocks with SF/DF conversions,
which is in the fake loop that contains the whole function, instead of
generating one

vxorp[ds] %xmmN, %xmmN, %xmmN

for each SF/DF conversion.

NB: The LCM algorithm isn't appropriate here since it may place a vxorps
inside the loop.  Simple testcase show this:

$ cat badcase.c

extern float f;
extern double d;

void
foo (int n, int k)
{
  for (int j = 0; j != n; j++)
    if (j < k)
      d = f;
}

It generates

    ...
    loop:
      if(j < k)
        vxorps    %xmm0, %xmm0, %xmm0
        vcvtss2sd f(%rip), %xmm0, %xmm0
      ...
    loopend
    ...

This is because LCM only works when there is a certain benifit.  But for
conditional branch, LCM wouldn't move

   vxorps  %xmm0, %xmm0, %xmm0

out of loop.  SPEC CPU 2017 on Intel Xeon with AVX512 shows:

1. The nearest dominator

|RATE |Improvement|
|500.perlbench_r | 0.55% |
|538.imagick_r | 8.43% |
|544.nab_r | 0.71% |

2. LCM

|RATE |Improvement|
|500.perlbench_r | -0.76% |
|538.imagick_r | 7.96%  |
|544.nab_r | -0.13% |

Performance impacts of SPEC CPU 2017 rate on Intel Xeon with AVX512
using

-Ofast -flto -march=skylake-avx512 -funroll-loops

before

commit e739972ad6ad05e32a1dd5c29c0b950a4c4bd576
Author: uros <uros@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Thu Jan 31 20:06:42 2019 +0000

            PR target/89071
            * config/i386/i386.md (*extendsfdf2): Split out reg->reg
            alternative to avoid partial SSE register stall for TARGET_AVX.
            (truncdfsf2): Ditto.
            (sse4_1_round<mode>2): Ditto.

    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@268427 138bc75d-0d04-0410-961f-82ee72b054a4

are:

|INT RATE |Improvement|
|500.perlbench_r | 0.55% |
|502.gcc_r | 0.14% |
|505.mcf_r | 0.08% |
|523.xalancbmk_r | 0.18% |
|525.x264_r |-0.49% |
|531.deepsjeng_r |-0.04% |
|541.leela_r |-0.26% |
|548.exchange2_r |-0.3% |
|557.xz_r |BuildSame|

|FP RATE |Improvement|
|503.bwaves_r         |-0.29% |
|507.cactuBSSN_r | 0.04% |
|508.namd_r |-0.74% |
|510.parest_r |-0.01% |
|511.povray_r | 2.23% |
|519.lbm_r | 0.1% |
|521.wrf_r | 0.49% |
|526.blender_r | 0.13% |
|527.cam4_r | 0.65% |
|538.imagick_r | 8.43% |
|544.nab_r | 0.71% |
|549.fotonik3d_r | 0.15% |
|554.roms_r | 0.08% |

After commit e739972ad6ad05e32a1dd5c29c0b950a4c4bd576, on Skylake client,
impacts on 538.imagick_r with

-fno-unsafe-math-optimizations -march=native -Ofast -funroll-loops -flto

1. Size comparision:

before:

   text    data     bss     dec     hex filename
2436377    8352    4528 2449257  255f69 imagick_r

after:

   text    data     bss     dec     hex filename
2425249    8352    4528 2438129  2533f1 imagick_r

2. Number of vxorps:

before after difference
4948            4135            -19.66%

3. Performance improvement:

|RATE |Improvement|
|538.imagick_r | 5.5%  |

gcc/

2019-02-22  H.J. Lu  <hongjiu.lu@intel.com>
    Hongtao Liu  <hongtao.liu@intel.com>
    Sunil K Pandey  <sunil.k.pandey@intel.com>

PR target/87007
* config/i386/i386-passes.def: Add
pass_remove_partial_avx_dependency.
* config/i386/i386-protos.h
(make_pass_remove_partial_avx_dependency): New.
* config/i386/i386.c (make_pass_remove_partial_avx_dependency):
New function.
(pass_data_remove_partial_avx_dependency): New.
(pass_remove_partial_avx_dependency): Likewise.
(make_pass_remove_partial_avx_dependency): Likewise.
* config/i386/i386.md (avx_partial_xmm_update): New attribute.
(*extendsfdf2): Add avx_partial_xmm_update.
(truncdfsf2): Likewise.
(*float<SWI48:mode><MODEF:mode>2): Likewise.
(SF/DF conversion splitters): Disabled for TARGET_AVX.

gcc/testsuite/

2019-02-22  H.J. Lu  <hongjiu.lu@intel.com>
    Hongtao Liu  <hongtao.liu@intel.com>
    Sunil K Pandey  <sunil.k.pandey@intel.com>

PR target/87007
* gcc.target/i386/pr87007-1.c: New test.
* gcc.target/i386/pr87007-2.c: Likewise.

Co-Authored-By: Hongtao Liu <hongtao.liu@intel.com>
Co-Authored-By: Sunil K Pandey <sunil.k.pandey@intel.com>
From-SVN: r269119

re PR middle-end/85598 (Incorrect -Wformat-truncation in a loop only at -O2 and -O3)

PR middle-end/85598
* gimple-ssa-sprintf.c (pass_sprintf_length::execute): Enable loop
analysis for pass.

From-SVN: r269115

x86: (Reapply) Move AESNI generation to Skylake and Goldmont

This is a repeat of commit r263989, which commit r264052 accidentally
reverted.

2019-02-22  Thiago Macieira  <thiago.macieira@intel.com>

PR target/89444
* config/i386/i386.h (PTA_WESTMERE): Remove PTA_AES.
(PTA_SKYLAKE): Add PTA_AES.
(PTA_GOLDMONT): Likewise.

From-SVN: r269114

c-pch.c (no_checksum): Remove.

2019-02-22  Richard Biener  <rguenther@suse.de>

c-family/
* c-pch.c (no_checksum): Remove.
(pch_init): Remove assertion that executable_checksum is not
all zero.
(c_common_valid_pch): Likewise.

From-SVN: r269113

[GCC, AArch64] Fix a couple of bugs in BTI

While doing more testing I found a couple of issues with my BTI patches.
This patch fixes them:
1) Remove a reference to return address key. The original patch was written
based on a different not yet committed patch ([PATCH 3/3][GCC][AARCH64] Add
support for pointer authentication B key) and I missed out on cleaning this
up. This is hidden behind the configuration option and thus went unnoticed.
2) Add a missed case for adding the BTI instruction in thunk functions.

*** gcc/ChangeLog ***

2019-02-22  Sudakshina Das  <sudi.das@arm.com>

* config/aarch64/aarch64.c (aarch64_output_mi_thunk): Add bti
instruction if enabled.
(aarch64_override_options): Remove reference to return address key.

From-SVN: r269112

re PR tree-optimization/89440 (ICE in vect_create_epilog_for_reduction, at tree-vect-loop.c:5502)

2019-02-22  Richard Biener  <rguenther@suse.de>

PR tree-optimization/89440
* tree-vect-loop.c (vect_create_epilog_for_reduction): Remove
not necessary assert.

* gcc.dg/vect/pr89440.c: New testcase.

From-SVN: r269111

Remove unused check_effective_target_offload_nvptx

gcc/testsuite/
* lib/target-supports.exp (check_effective_target_offload_nvptx):
Remove.

From-SVN: r269110

[libgomp] In OpenACC testing, by default only build for the offload target that we're actually going to test

... to avoid compilation overhead, and to keep simple '-foffload=[...]'
handling in test cases.

libgomp/
* testsuite/libgomp.oacc-c++/c++.exp: Specify
"-foffload=$offload_target".
* testsuite/libgomp.oacc-c/c.exp: Likewise.
* testsuite/libgomp.oacc-fortran/fortran.exp: Likewise.
* testsuite/lib/libgomp.exp
(check_effective_target_openacc_nvidia_accel_configured): Remove,
as (conceptually) merged into
check_effective_target_openacc_nvidia_accel_selected.  Adjust all
users.

From-SVN: r269109

[libgomp] In OpenACC testing, cycle though all offload targets

... instead of through offload plugins.

libgomp/
* plugin/configfrag.ac: Populate and AC_SUBST offload_targets.
* testsuite/libgomp-test-support.exp.in: Adjust.
* testsuite/lib/libgomp.exp: Likewise.  Don't populate
openacc_device_types_s.
(offload_target_to_openacc_device_type): New proc.
* testsuite/libgomp.oacc-c++/c++.exp: Adjust.
* testsuite/libgomp.oacc-c/c.exp: Likewise.
* testsuite/libgomp.oacc-fortran/fortran.exp: Likewise.
* Makefile.in: Regenerate.
* configure: Likewise.
* testsuite/Makefile.in: Likewise.

From-SVN: r269108

[libgomp] Clarify difference between offload target, offload plugin, and OpenACC device type

libgomp/
* plugin/configfrag.ac: Populate and AC_SUBST offload_plugins
instead of offload_targets, and AC_DEFINE_UNQUOTED OFFLOAD_PLUGINS
instead of OFFLOAD_TARGETS.
* target.c (gomp_target_init): Adjust.
* testsuite/libgomp-test-support.exp.in: Likewise.
* testsuite/lib/libgomp.exp: Likewise.  Populate
openacc_device_types_s instead of offload_targets_s_openacc.
(check_effective_target_openacc_nvidia_accel_selected)
(check_effective_target_openacc_host_selected): Adjust.
* testsuite/libgomp.oacc-c++/c++.exp: Likewise.
* testsuite/libgomp.oacc-c/c.exp: Likewise.
* testsuite/libgomp.oacc-fortran/fortran.exp: Likewise.
* Makefile.in: Regenerate.
* config.h.in: Likewise.
* configure: Likewise.
* testsuite/Makefile.in: Likewise.

From-SVN: r269107

[libgomp] In OpenACC offloading testing, be more explicit in what is supported, and what is not, or why not

libgomp/
* testsuite/lib/libgomp.exp: Error out for unknown offload target.
* testsuite/libgomp.oacc-c++/c++.exp: Likewise.  Report if
"offloading: supported, but hardware not accessible".
* testsuite/libgomp.oacc-c/c.exp: Likewise.
* testsuite/libgomp.oacc-fortran/fortran.exp: Likewise.

From-SVN: r269106

[PR72741] Use 'oacc_build_routine_dims' for Fortran OpenACC 'routine' directives, too

... instead of having an incomplete local implementation.

With these changes in place, we can then also revert the work-around r267213
"[nvptx] Unify C/Fortran routine handling in nvptx_goacc_validate_dims".

gcc/fortran/
PR fortran/72741
* gfortran.h (oacc_routine_lop): New enum.
(symbol_attribute): Use it.
* openmp.c (gfc_oacc_routine_dims): Replace with...
(gfc_oacc_routine_lop): ... this new function.
(gfc_match_oacc_routine): Adjust.
* trans-decl.c (add_attributes_to_decl): Likewise.
gcc/
PR fortran/72741
* omp-general.c (oacc_replace_fn_attrib): Mostly split out into...
(oacc_replace_fn_attrib_attr): ... this new function.
* omp-general.h (oacc_replace_fn_attrib_attr): New prototype.
* config/nvptx/nvptx.c (nvptx_goacc_validate_dims_1): Revert workaround.
gcc/testsuite/
PR fortran/72741
* gfortran.dg/goacc/classify-routine.f95: Adjust.

Co-Authored-By: Cesar Philippidis <cesar@codesourcery.com>
From-SVN: r269105

Revert earlier OpenACC 'routine' changes

..., which were committed as part of, but logically don't belong into r261813
"Update OpenACC data clause semantics to the 2.5 behavior", and which confuse
later changes.

gcc/fortran/
* openmp.c (gfc_match_oacc_declare): Revert earlier changes.
gcc/testsuite/
* c-c++-common/goacc/routine-5.c: Revert earlier changes.
* g++.dg/goacc/template.C: Likewise.

From-SVN: r269104

Silence '-Whsa' diagnostic in 'gfortran.dg/goacc/pr78027.f90'

... which has been present (with HSA offloading configured) ever since this
test case got added.

gcc/testsuite/
PR fortran/78027
* gfortran.dg/goacc/pr78027.f90: Add 'dg-additional-options "-Wno-hsa"'.

From-SVN: r269103

[C, C++] Use correct location information for OpenACC shape and simple clauses

gcc/c/
* c-parser.c (c_parser_oacc_shape_clause): Add loc formal
parameter.  Adjust all users.
(c_parser_oacc_simple_clause): Replace parser with loc formal
parameter.  Adjust all users.
gcc/cp/
* parser.c (cp_parser_oacc_simple_clause): Remove parser formal
parameter, move loc formal parameter to the front.  Adjust all
users.
(cp_parser_oacc_shape_clause): Add loc formal parameter.  Adjust
all users.

From-SVN: r269102

[arm] Add support for Neoverse N1

This patch adds support for the Neoverse N1 [1]. This CPU was previously supported through the Ares codename.
-mcpu=ares is retained as an alias of the new -mcpu=neoverse-n1.

Bootstrapped and tested on arm-none-linux-gnueabihf.

* config/arm/arm-cpus.in (ares): Rename to...
(neoverse-n1): ... This.  Add ares as alias.
* config/arm/arm-tables.opt: Regenerate.
* config/arm/arm-tune.md: Likewise.
* doc/invoke.txt (ARM Options): Document neoverse-n1.

From-SVN: r269101

[AArch64] Add support for Neoverse E1

This patch adds -mcpu and -mtune support for the Neoverse E1 CPU [1].
The new option is -mcpu=neoverse-e1.
Bootstrapped and tested on aarch64-none-linux-gnu.

* config/aarch64/aarch64-cores.def (neoverse-e1): Define.
* config/aarch64/aarch64-tune.md: Regenerate.
* doc/invoke.texi (AArch64 Options): Document neoverse-e1 -mcpu option.

From-SVN: r269100

[AArch64] Add support for Neoverse N1

This patch adds support for the Neoverse N1 CPU [1]. This was supported in GCC earlier through the codename Ares,
which it now replaces. -mcpu=ares is still accepted as there's been a binutils release supporting it,
but the internal structures are renamed to use Neoverse N1-related identifiers.

Bootstrapped and tested on aarch64-none-linux-gnu.

* config/aarch64/aarch64.c (ares_tunings): Rename to...
(neoversen1_tunings): ... This.
* config/aarch64/aarch64-cores.def (ares): Change tuning to the above.
(neoverse-n1): New CPU.
* config/aarch64/aarch64-tune.md: Regenerate.
* doc/invoke.txt (AArch64 Options): Document neoverse-n1.

From-SVN: r269099

re PR tree-optimization/87609 (miscompilation with restrict and loop)

2019-02-22  Richard Biener  <rguenther@suse.de>

PR middle-end/87609
* cfghooks.h (dependence_hash): New typedef.
(struct copy_bb_data): New type.
(cfg_hooks::duplicate_block): Adjust to take a copy_bb_data argument.
(duplicate_block): Likewise.
* cfghooks.c (duplicate_block): Pass down copy_bb_data.
(copy_bbs): Create and pass down copy_bb_data.
* cfgrtl.c (cfg_layout_duplicate_bb): Adjust.
(rtl_duplicate_bb): Likewise.
* tree-cfg.c (gimple_duplicate_bb): If the copy_bb_data arg is not NULL
remap dependence info.

* gcc.dg/torture/restrict-7.c: New testcase.

From-SVN: r269098

re PR tree-optimization/87609 (miscompilation with restrict and loop)

2019-02-22  Richard Biener  <rguenther@suse.de>

PR tree-optimization/87609
* tree-core.h (tree_base): Document special clique values.
* tree-inline.c (remap_dependence_clique): Do not use the
special clique value of one.
(maybe_set_dependence_info): Use clique one.
(clear_dependence_clique): New callback.
(compute_dependence_clique): Clear clique one from all refs
before assigning it (again).

From-SVN: r269097

configure.host (abi_baseline_pair): Adjust for SPARC64/Linux.

* configure.host (abi_baseline_pair): Adjust for SPARC64/Linux.
* config/abi/post/sparc64-linux-gnu: New directory.
* config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: New file.
* config/abi/post/sparc64-linux-gnu/32: New directory.
* config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: New file.

From-SVN: r269096

PR c++/87685 - generic lambda 'this' capture error.

The standard says that in a generic lambda we should speculatively capture
'this' if we see a call to an overload set that contains a non-static member
function, but it seems wrong to reject the program if we can't capture,
since it might not actually be needed.

* lambda.c (lambda_expr_this_capture): Change add_capture_p to int.
(maybe_generic_this_capture): Pass -1.

From-SVN: r269095

PR c++/88394 - ICE with VLA init-capture.

We mostly use is_normal_capture_proxy to decide whether or not to use
DECL_CAPTURED_VARIABLE; we could just check whether it's set.  VLA capture
is still mostly broken, but this fixes this ICE.

* lambda.c (is_normal_capture_proxy): Check DECL_CAPTURED_VARIABLE.

From-SVN: r269094

PR c++/88869 - C++17 ICE with CTAD and explicit specialization.

The members of an explicit specialization of a class template don't have the
template parameters of that class template, so we shouldn't try to provide
arguments for them.  Only set outer_args when the class is an instantiation.

* pt.c (do_class_deduction): Don't include explicit specialization
args in outer_args.

From-SVN: r269093

Add tests for C++2a content of <atomic> header

* testsuite/29_atomics/headers/atomic/types_std_c++20.cc: New test.
* testsuite/29_atomics/headers/atomic/types_std_c++20_neg.cc: New
test.

From-SVN: r269091

P0482R5 char8_t: Updates to gdb pretty printing support

This patch adds recognition of the u8string and u8string_view type
aliases to the gdb pretty printer extension.

2019-02-22  Tom Honermann  <tom@honermann.net>

* python/libstdcxx/v6/printers.py (register_type_printers): Add type
printers for u8string and u8string_view.

From-SVN: r269090

P0482R5 char8_t: Updates to existing standard library tests

This patch augments existing tests to validate behavior for char8_t.  In
all cases, added test cases are cloned from existing tests for wchar_t
or char16_t.

A few tests required updates to line numbers for diagnostic messages.

2019-02-22  Tom Honermann  <tom@honermann.net>

* testsuite/18_support/byte/ops.cc: Validate
std::to_integer<char8_t>, std::to_integer<char16_t>, and
std::to_integer<char32_t>.
* testsuite/18_support/numeric_limits/dr559.cc: Validate
std::numeric_limits<char8_t>.
* testsuite/18_support/numeric_limits/lowest.cc: Validate
std::numeric_limits<char8_t>::lowest().
* testsuite/18_support/numeric_limits/max_digits10.cc: Validate
std::numeric_limits<char8_t>::max_digits10.
* testsuite/18_support/type_info/fundamental.cc: Validate
typeinfo for char8_t.
* testsuite/20_util/from_chars/1_c++20_neg.cc: New test, validating
std::from_chars with char8_t.
* testsuite/20_util/hash/requirements/explicit_instantiation.cc:
Validate explicit instantiation of std::hash<char8_t>.
* testsuite/20_util/is_integral/value.cc: Validate
std::is_integral<char8_t>.
* testsuite/20_util/make_signed/requirements/typedefs-4.cc:
Validate std::make_signed<char8_t>.
* testsuite/21_strings/basic_string/cons/char/deduction.cc:
Validate u8string construction from char8_t sources.
* testsuite/21_strings/basic_string/types/pmr_typedefs.cc: Validate
std::pmr::u8string.
* testsuite/21_strings/basic_string_view/operations/compare/
char/70483.cc: Validate substr operations on u8string_view.
* testsuite/21_strings/basic_string_view/typedefs.cc: Validate that
the u8string_view typedef is defined.
* testsuite/21_strings/char_traits/requirements/
constexpr_functions.cc: Validate char_traits<char8_t> constexpr
member functions.
* testsuite/21_strings/char_traits/requirements/
constexpr_functions_c++17.cc: Validate char_traits<char8_t> C++17
constexpr member functions.
* testsuite/21_strings/headers/string/types_std_c++0x.cc: Validate
that the u8string typedef is defined.
* testsuite/22_locale/locale/cons/unicode.cc: Validate the presence
of the std::codecvt<char16_t, char8_t, std::mbstate_t> and
std::codecvt<char32_t, char8_t, std::mbstate_t> facets.
* testsuite/29_atomics/atomic/cons/assign_neg.cc: Update line
numbers.
* testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
* testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
Likewise.
* testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
* testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
Validate std::atomic<char8_t>::is_always_lock_free
* testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
Update line numbers.
* testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
Likewise.
* testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
Likewise.
* testsuite/experimental/polymorphic_allocator/pmr_typedefs_string.cc:
Validate std::experimental::pmr::u8string.
* testsuite/experimental/string_view/typedefs.cc: Validate that the
u8string_view typedef is defined.
* testsuite/util/testsuite_common_types.h: Add char8_t, char16_t and
char32_t to the typelists.

From-SVN: r269089

Disambiguate __gnu_cxx::append_ partial specialization

This patch corrects ambiguous partial specializations of
typelist::detail::append_.  Previously, neither append_<chain<Hd, Tl>,
Typelist_Chain> nor append_<Typelist_Chain, null_type> was a better
match for append_<chain<Hd, Tl>, null_type>.

2019-02-22  Tom Honermann  <tom@honermann.net>

* include/ext/typelist.h: Constrain a partial specialization of
typelist::detail::append_ to only match chain<T1,T2>.

From-SVN: r269088

re PR go/89406 (Go testing leaves many temporary directories in /tmp around)

PR go/89406
    net: remove unixgram test sockets

    Backport https://golang.org/cl/163277 from the master library.

    Updates https://gcc.gnu.org/PR89406

    Reviewed-on: https://go-review.googlesource.com/c/163200

From-SVN: r269087

cmd/go: remove work directory on usage error

    Backport https://golang.org/cl/163237 from the master library:

        Ensure that cmd/go consistently calls base.Exit rather than os.Exit,
        so that we don't incorrectly leave the work directory around on exit.

        Test this by modifying the testsuite to run all the tests with TMPDIR
        set to a temporary directory, and then check that no files are left
        behind in that temporary directory. Adjust a couple of tests to make
        this approach work.

    Updates https://gcc.gnu.org/PR89406

    Reviewed-on: https://go-review.googlesource.com/c/163198

From-SVN: r269086

Daily bump.

From-SVN: r269085

extend.texi (__clear_cache): Correct signature.

gcc/ChangeLog:

* doc/extend.texi (__clear_cache): Correct signature.

libgcc/ChangeLog:

* libgcc2.h (__clear_cache): Correct signature.
* libgcc2.c (__clear_cache): Same.

gcc/testsuite/ChangeLog:

* gcc.dg/Wbuiltin-declaration-mismatch-12.c: New test.

From-SVN: r269082

PR c++/89422 - ICE with -g and lambda in default arg in template.

Here, we were trying to instantiate the default argument before setting
DECL_FRIEND_CONTEXT, so that the instantiated lambda ended up being treated
as part of the S template, which confused dwarf2out.

* pt.c (tsubst_function_decl): SET_DECL_FRIEND_CONTEXT sooner.

From-SVN: r269081

PR c++/88419 - C++17 ICE with class template arg deduction.

Just like in make_constrained_auto, we need to defer setting TYPE_CANONICAL
until we've set fields that will affect structural_comptypes.

* pt.c (make_template_placeholder): Set TYPE_CANONICAL after
CLASS_PLACEHOLDER_TEMPLATE.

From-SVN: r269080

re PR go/89170 (FAIL: net/http)

PR go/89170
* varasm.c (decode_addr_const): Call lookup_constant_def rather
than output_constant_def.
(add_constant_to_table): New static function.
(output_constant_def): Call add_constant_to_table.
(tree_output_constant_def): Likewise.

From-SVN: r269079

re PR c++/89285 (ICE after casting the this pointer in the constructor in C++17 mode)

PR c++/89285
* builtins.c (fold_builtin_arith_overflow): If first two args are
INTEGER_CSTs, set intres and ovfres to constants rather than calls
to ifn.

* constexpr.c (struct constexpr_fundef): Add parms and result members.
(retrieve_constexpr_fundef): Adjust for the above change.
(register_constexpr_fundef): Save constexpr body with copy_fn,
temporarily set DECL_CONTEXT on DECL_RESULT before that.
(get_fundef_copy): Change FUN argument to FUNDEF with
constexpr_fundef * type, grab body and parms/result out of
constexpr_fundef struct and temporarily change it for copy_fn calls
too.
(cxx_eval_builtin_function_call): For __builtin_FUNCTION temporarily
adjust current_function_decl from ctx->call context.  Test
!potential_constant_expression instead of !is_constant_expression.
(cxx_bind_parameters_in_call): Grab parameters from new_call.  Undo
convert_for_arg_passing changes for TREE_ADDRESSABLE type passing.
(cxx_eval_call_expression): Adjust get_fundef_copy caller.
(cxx_eval_conditional_expression): For IF_STMT, allow then or else
operands to be NULL.
(label_matches): Handle BREAK_STMT and CONTINUE_STMT.
(cxx_eval_loop_expr): Add support for FOR_STMT, WHILE_STMT and DO_STMT.
(cxx_eval_switch_expr): Add support for SWITCH_STMT.
(cxx_eval_constant_expression): Handle IF_STMT, FOR_STMT, WHILE_STMT,
DO_STMT, CONTINUE_STMT, SWITCH_STMT, BREAK_STMT and CONTINUE_STMT.
For SIZEOF_EXPR, recurse on the result of fold_sizeof_expr.  Ignore
DECL_EXPR with USING_DECL operand.
* lambda.c (maybe_add_lambda_conv_op): Build thisarg using
build_int_cst to make it a valid constant expression.

* g++.dg/ubsan/vptr-4.C: Expect reinterpret_cast errors.
* g++.dg/cpp1y/constexpr-84192.C (f2): Adjust expected diagnostics.
* g++.dg/cpp1y/constexpr-70265-2.C (foo): Adjust expected line of
diagnostics.
* g++.dg/cpp1y/constexpr-89285.C: New test.
* g++.dg/cpp0x/constexpr-arith-overflow.C (add, sub, mul): Ifdef out
for C++11.
(TEST_ADD, TEST_SUB, TEST_MUL): Define to Assert (true) for C++11.
* g++.dg/cpp0x/constexpr-arith-overflow2.C: New test.

From-SVN: r269078

PR libstdc++/89416 fix __is_move_insertable trait

The common base class for __is_move_insertable and __is_copy_insertable
instantiates both the copy and move tests, when only one is needed. The
unneeded one might cause errors outside the immediate context.

The solution used in this patch is to replace them with alias templates,
which will only be instantiated as needed.

PR libstdc++/89416
* include/bits/alloc_traits.h (__is_alloc_insertable_impl): Replace
class template with class. Replace move and copy member types with
member alias templates, so they are only instantiated when needed.
(__is_copy_insertable, __is_move_insertable): Adjust base class.
* testsuite/23_containers/vector/modifiers/push_back/89130.cc: Enable
test for C++11/14/17 as well.
* testsuite/23_containers/vector/modifiers/push_back/89416.cc: New
test.

From-SVN: r269075

i386: Replace -fcf-protection with -fcf-protection=branch

Since -mindirect-branch is incompatible with -fcf-protection=return and
-fcf-protection, replace -fcf-protection with -fcf-protection=branch.

PR target/87412
* gcc.target/i386/indirect-thunk-attr-14.c: Replace
-fcf-protection with -fcf-protection=branch.
* gcc.target/i386/indirect-thunk-attr-15.c: Likewise.
* gcc.target/i386/indirect-thunk-attr-16.c: Likewise.
* gcc.target/i386/indirect-thunk-extern-8.c: Likewise.
* gcc.target/i386/indirect-thunk-extern-9.c: Likewise.
* gcc.target/i386/indirect-thunk-extern-10.c: Likewise.

From-SVN: r269074

PR c++/88690 - C++17 ICE with empty base in aggregate.

Base fields for empty bases appear in initialization order, which may not be
the same as layout order.  If they also show up in a CONSTRUCTOR in that
order, output_constructor_regular_field aborts because it understandably
doesn't want to go backwards.  I also considered making o_c_r_f more
tolerant of the case where the out-of-order field has fieldsize 0, and so no
actual data needs to be emitted, but we might as well avoid adding an
element to the CONSTRUCTOR in the first place.

* typeck2.c (process_init_constructor_record): Skip trivial
initialization of an empty base.

From-SVN: r269073

Fix pr88850-2 test

Like the pr88850.c test, also fix the pr88850-2.c testcase which
was failing in hardfp environments.

Committed as obvious.

    gcc/testsuite/
* gcc.target/arm/pr88850-2.c: Block -mfloat-abi override.
* gcc.target/arm/pr88850.c: Use -mfloat-abi=softfp.

From-SVN: r269072

dump-parse-tree.c (debug): Implement for gfc_expr *, gfc_typespec *, gfc_typespec and gfc_symbol *.

2019-02-21  Thomas Koenig  <tkoenig@gcc.gnu.org>

    * dump-parse-tree.c (debug): Implement for gfc_expr *,
    gfc_typespec *, gfc_typespec and gfc_symbol *.

From-SVN: r269071

re PR fortran/86119 (Intrinsic len has wrong type if used within select type for a class(*) string)

2019-02-21  Thomas Koenig  <tkoenig@gcc.gnu.org>

    PR fortran/86119
    * class.c (gfc_get_len_component): Add argument k for kind.
    If the kind of the resulting expression is not equal to k,
    convert it.
    * gfortran.h (gfc_len_component): Adjust prototype.
    * simplify.c (gfc_simplify_len): Pass kind to
    gfc_get_len_component.

2019-02-21  Thomas Koenig  <tkoenig@gcc.gnu.org>

    PR fortran/86119
    * gfortran.dg/warn_conversion_11.f90: New test.

From-SVN: r269070

i386: Check -mindirect-branch/-mfunction-return with -fcf-protection

Issue an error when -mindirect-branch or -mfunction-return are used
with incompatible -fcf-protection.

gcc/

PR target/87412
* config/i386/i386.c (ix86_set_indirect_branch_type): Issue an
error for -mindirect-branch/-mfunction-return with incompatible
-fcf-protection.

gcc/testsuite/

PR target/87412
* gcc.target/i386/pr87412-1.c: New file.
* gcc.target/i386/pr87412-2.c: Likewise.
* gcc.target/i386/pr87412-3.c: Likewise.
* gcc.target/i386/pr87412-4.c: Likewise.

From-SVN: r269068

re PR bootstrap/88714 (bootstrap comparison failure on armv7l since r265398)

PR bootstrap/88714
* constraints.md (q): Remove.
* config/arm/ldrdstrd.md (*arm_ldrd, *arm_strd): Use rk constraint
instead of q.

From-SVN: r269067

[omp] Move NE_EXPR handling to omp_adjust_for_condition

2019-02-21  Martin Jambor  <mjambor@suse.cz>

PR hsa/89302
* omp-general.c (omp_extract_for_data): Removed a duplicate call
to omp_adjust_for_condition, moved NE_EXPR code_cond processing...
(omp_adjust_for_condition): ...here.  Added necessary parameters.
* omp-general.h (omp_adjust_for_condition): Updated declaration.
* omp-grid.c (grid_attempt_target_gridification): Adjust to pass
proper values to new parameters of omp_adjust_for_condition.

From-SVN: r269066

re PR c++/89392 (ICE in bitmap_bit_p, at bitmap.c:978)

2019-02-21  Richard Biener  <rguenther@suse.de>

PR middle-end/89392
cp/
* vtable-class-hierarchy.c (vtv_generate_init_routine): Do not
make symtab process new functions here.

From-SVN: r269065

PR c++/87921 - wrong error with inline static data member.

c_parse_final_cleanups checks DECL_IN_AGGR_P to avoid trying to emit a
static data member that has not been defined.  The inline variable patch
changed that to exempt inline variables.  But in this case we haven't
instantiated the variable yet, so we really don't have a definition.  This
patch changes inline variable handling such that DECL_IN_AGGR_P is not set
for a defined inline variable, so we can remove all the checks of
DECL_INLINE_VAR_P after DECL_IN_AGGR_P.

With that change we were failing on a static data member that had been
instantiated due to a use before we got around to processing it in
instantiate_class_template; we should detect that and avoid all the
finish_static_data_member_decl processing, which assumes that it is the
first time we're seeing the variable.

* decl2.c (finish_static_data_member_decl): Don't set DECL_IN_AGGR_P
for a non-template inline variable.  Do nothing for an
already-instantiated variable.
(c_parse_final_cleanups): Check DECL_IN_AGGR_P without
DECL_INLINE_VAR_P.
* decl.c (check_initializer): Likewise.
(make_rtl_for_nonlocal_decl): Likewise.
* pt.c (instantiate_decl): Likewise.
* typeck2.c (store_init_value): Likewise.

From-SVN: r269064

re PR go/89407 (go bootstrap failure on s390x starting with r268941)

PR go/89407
    internal/cpu: use #ifdef __s390x__ in C code

    Patch by Jakub Jelinek.

    Fixes https://gcc.gnu.org/PR89407

    Reviewed-on: https://go-review.googlesource.com/c/163297

From-SVN: r269063

Daily bump.

From-SVN: r269062

re PR c++/89403 (ICE in maybe_clone_body, at cp/optimize.c:693)

PR c++/89403
* decl2.c (c_parse_final_cleanups): Move TREE_ASM_WRITTEN setting
for flag_syntax_only from here...
* semantics.c (expand_or_defer_fn_1): ... here.

* g++.dg/cpp0x/pr89403.C: New test.

From-SVN: r269059

re PR c++/89405 (ICE in import_export_decl, at cp/decl2.c:2959)

PR c++/89405
* decl.c (maybe_commonize_var): When clearing TREE_PUBLIC and
DECL_COMMON, set DECL_INTERFACE_KNOWN.

* g++.dg/cpp1z/inline-var5.C: New test.

From-SVN: r269058

re PR middle-end/89412 (gcc ICE in simplify_subreg, at simplify-rtx.c:6273 on i686-linux-gnu)

PR middle-end/89412
* expr.c (expand_assignment): If result is a MEM, use change_address
instead of simplify_gen_subreg.

* gcc.c-torture/compile/pr89412.c: New test.

From-SVN: r269057

re PR middle-end/89091 (ICE: Segmentation fault (in tree_class_check))

PR middle-end/89091
* fold-const.c (decode_field_reference): Return NULL_TREE if
lang_hooks.types.type_for_size returns NULL.  Check it before
overwriting *exp_.  Use return NULL_TREE instead of return 0.

* gcc.dg/torture/pr89091.c: New test.

Co-Authored-By: David Malcolm <dmalcolm@redhat.com>
From-SVN: r269056

re PR tree-optimization/88074 (g++ hangs on math expression)

PR middle-end/88074
PR middle-end/89415
* toplev.c (do_compile): Double the emin/emax exponents to workaround
buggy mpc_norm.

* gcc.dg/pr88074-2.c: New test.

From-SVN: r269055

re PR target/89397 (ICE in build_call_expr_loc_array at gcc/tree.c:11563 since r229082)

PR target/89397
* config/i386/i386.c (ix86_atomic_assign_expand_fenv): Check
TARGET_SSE in addition to TARGET_SSE_MATH.

(ix86_excess_precision): Ditto.
(ix86_float_exceptions_rounding_supported_p): Ditto.
(use_rsqrt_p): Ditto.
* config/i386/sse.md (rsqrt<mode>2): Ditto.

From-SVN: r269054

linux-unwind.h (alpha_fallback_frame_state): Cast 'mcontext_t *' &rt_->uc.uc_mcontext to 'struct sigcontext *'.

* config/alpha/linux-unwind.h (alpha_fallback_frame_state):
Cast 'mcontext_t *' &rt_->uc.uc_mcontext to 'struct sigcontext *'.

From-SVN: r269053

re PR c++/89336 (internal compiler error when compiling a constexpr function)

PR c++/89336
* constexpr.c (cxx_eval_store_expression): Diagnose changing of active
union member for -std=c++17 and earlier.

* g++.dg/cpp1y/constexpr-89336-3.C: New test.

From-SVN: r269052

Fix ICE with #line directive (PR c/89410)

PR c/89410 reports various issues with #line directives with very
large numbers; one of them is an ICE inside diagnostic-show-locus.c
when emitting a diagnostic at line 0xffffffff.

The issue is that the arithmetic in layout::calculate_line_spans to
determine if two line spans are sufficiently close to consolidate
was using the unsigned 32-bit linenum_type, which was overflowing
when comparing the line for the expanded location with those of
the location range (all on line 0xffffffff), leading to it
erroneously adding two spans for the same line, leading to an
assertion failure.

This patch fixes the ICE by generalizing the use of long long in
line-map.h's comparison function for linenum_type into a new
linenum_arith_t typedef, and using it here.

Doing so uncovered a second problem: the loop to print the lines
within the line_span for this case is infinite: looping from
0xfffffff upwards, overflowing to 0, and then never becoming
greater than 0xfffffff.  The patch fixes this by using linenum_arith_t
there also.

gcc/ChangeLog:
PR c/89410
* diagnostic-show-locus.c (layout::calculate_line_spans): Use
linenum_arith_t when determining if two adjacent line spans are
close enough to merge.
(diagnostic_show_locus): Use linenum_arith_t when iterating over
lines within each line_span.

gcc/testsuite/ChangeLog:
PR c/89410
* gcc.dg/pr89410-1.c: New test.
* gcc.dg/pr89410-2.c: New test.

libcpp/ChangeLog:
PR c/89410
* include/line-map.h (linenum_arith_t): New typedef.
(compare): Use it.

From-SVN: r269050

compiler: fix a typo in comments

    Reviewed-on: https://go-review.googlesource.com/c/163097

From-SVN: r269049

PR c++/87513 - 'sorry' mangling PMF template-id.

Here build_offset_ref calls build_qualified_name to make a SCOPE_REF because
the dependent template arguments make type_dependent_expression_p (member)
true.  We could probably work hard to prevent this, but it doesn't seem
necessary, and it's easy to fix write_expression to handle the result.

* mangle.c (write_expression): Handle SCOPE_REF to BASELINK.

From-SVN: r269048

* g++.old-deja/g++.robertl/eb92.C: Handle warning as well.

From-SVN: r269047

PR c++/88380 - wrong-code with flexible array and NSDMI.

Here 'skipped' was set to -1 to force an explicit initializer for 'uninit'
before the initializer for 'initialized', and so we also tried to emit an
explicit initializer for the flexible array, for which build_zero_init
returns error_mark_node.  We should ignore flexarrays even when
skipped < 0.

* typeck2.c (process_init_constructor_record): Skip flexarrays.

From-SVN: r269046

PR c++/88572 - wrong handling of braces on scalar init.

* decl.c (reshape_init_r): Allow braces around scalar initializer
within aggregate init.  Reject double braced-init of scalar
variable.

From-SVN: r269045

target-supports.exp (check_effective_target_vect_usad_char): Add PowerPC support.

* lib/target-supports.exp (check_effective_target_vect_usad_char):
Add PowerPC support.
* gcc.dg/vect/slp-reduc-sad.c: Update scan string.
* gcc.dg/vect/vect-reduc-sad.c: Likewise.

From-SVN: r269043

libsanitizer: Restore internal_readlink for x32

Cherry-pick compiler-rt revision 354451:

r316591 has

@@ -389,13 +383,11 @@ uptr internal_dup2(int oldfd, int newfd) {
 }

 uptr internal_readlink(const char *path, char *buf, uptr bufsize) {
-#if SANITIZER_NETBSD
-  return internal_syscall_ptr(SYSCALL(readlink), path, buf, bufsize);
-#elif SANITIZER_USES_CANONICAL_LINUX_SYSCALLS
+#if SANITIZER_USES_CANONICAL_LINUX_SYSCALLS
   return internal_syscall(SYSCALL(readlinkat), AT_FDCWD,
                           (uptr)path, (uptr)buf, bufsize);
 #else
-  return internal_syscall(SYSCALL(readlink), (uptr)path, (uptr)buf, bufsize);
+  return internal_syscall_ptr(SYSCALL(readlink), path, buf, bufsize);
 #endif
 }

which dropped the (uptr) cast and broke x32.  This patch puts back the
(uptr) cast to restore x32 and fixes:

https://bugs.llvm.org/show_bug.cgi?id=40783

Differential Revision: https://reviews.llvm.org/D58413

PR sanitizer/89409
* sanitizer_common/sanitizer_linux.cc (internal_readlink):
Cherry-pick compiler-rt r354451.

From-SVN: r269042

Fix testsuite

2019-02-19  Caroline Tice <cmtice@google.com>

Fix testsuite
* testsuite/libvtv.cc/const_vtable.cc (main): Fix function signature.

From-SVN: r269041

revert: re PR target/89397 (ICE in build_call_expr_loc_array at gcc/tree.c:11563 since r229082)

Revert:
        PR target/89397
        * config/i386/i386.c (ix86_option_override_internal): Set
        opts->x_ix86_fpmath to FPMATH_387 when SSE is disabled.

        gcc/testsuite/

        PR target/89397
        * gcc.target/i386/pr89397.c: New test.

From-SVN: r269040

[GCC] PR target/86487: fix the way 'uses_hard_regs_p' handles paradoxical
subregs

gcc/ChangeLog:
2019-02-20 Andre Vieira  <andre.simoesdiasvieira@arm.com>

PR target/86487
* lra-constraints.c(uses_hard_regs_p): Fix handling of
paradoxical SUBREGS.

gcc/testsuite/ChangeLog:
2019-02-20 Andre Vieira  <andre.simoesdiasvieira@arm.com>

PR target/86487
* gcc.target/arm/pr86487.c: New.

From-SVN: r269039

Change singular to plural in gfortran.texi.

2019-02-20  Martin Liska  <mliska@suse.cz>

* gfortran.texi: Change singular to plural.

From-SVN: r269038

re PR c++/84536 (ICE with non-type template parameter)

/cp
2019-02-20  Paolo Carlini  <paolo.carlini@oracle.com>

PR c++/84536
* pt.c (tsubst_init): Diagnose an initializer expanding to an
empty list of expressions; tweak wrt dependent types.
(regenerate_decl_from_template): For VAR_DECLs call tsubst_init
instead of tsubst_expr.

/testsuite
2019-02-20  Paolo Carlini  <paolo.carlini@oracle.com>

PR c++/84536
* g++.dg/cpp1y/var-templ60.C: New.

From-SVN: r269037

Correction of ChangeLog entry, Thomas provided the code for this change.

2019-02-19  Thomas Schwinge  <thomas@codesourcery.com>

PR c/87924
* openmp.c (gfc_match_omp_clauses): Add representation of wait clause
without argument as 'wait (GOMP_ASYNC_NOVAL)'.

From-SVN: r269036

Document Fortran header directive.

2019-02-20  Martin Liska  <mliska@suse.cz>

* gfortran.texi: Document Fortran header directive.

From-SVN: r269035

re PR libstdc++/89402 (warning: ‘void _ZNKSt4hashIeEclEe()’ specifies less restrictive attribute than its target)

PR libstdc++/89402
* src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Add
_GLIBCXX_PURE to the alias declaration.

From-SVN: r269034

[rs6000] fix PR 88100, range check for vec_splat_{su}{8,16,32}

GCC revision 259524 implemented range check for the vec_splat_{su}{8,16,32}
builtins.  However, as a consequence of the implementation, the range check
is not done correctly for the expected vspltis[bhw] instructions.  The result
is that we may not get a valid error message if the valid range of the data
is exceeded.

Although the input of the function prototype of vec_splat_{su}{8,16,32} is
const int, the actual data usage range is limited to the data range of 5 bits
signed.  We should limit the int_cst.val[0] data to the 5 bit signed data range
without any modification in the input arg0 parameter.  However, the sext_hwi
function intercepts the data of TREE_INT_CST_LOW (arg0) as size bits in the
sext_hwi (TREE_INT_CST_LOW (arg0), size) statement.  This will cause some of
the excess data to fall within the range of 5 bits signed, so that the correct
diagnostic information cannot be generated, we need to remove the sext_hwi to
ensure that the input data has not been modified.

This patch fix range check for the vec_splat_s[8,16,32] builtins.  The argument
must be a 5-bit const int as specified for the vspltis[bhw] instructions.

for gcc/ChangeLog

PR target/88100
* gcc/config/rs6000/rs6000.c (rs6000_gimple_fold_builtin)
<case ALTIVEC_BUILTIN_VSPLTISB, ALTIVEC_BUILTIN_VSPLTISH,
ALTIVEC_BUILTIN_VSPLTISW>: Don't convert the operand before
range checking it.

for gcc/testsuite/ChangeLog

PR target/88100
* gcc/testsuite/gcc.target/powerpc/pr88100.c: New testcase.

From-SVN: r269033

PR c++/88368 - wrong 'use of deleted function'

Since my patch for 81359 allowed us to signal failure on return from
maybe_instantiate_noexcept, we no longer need to turn an error into
noexcept(false).  We also need to handle NSDMI instantiation errors under
synthesized_method_walk.  This change caused some instantiation context
notes to be lost in the testsuite, so I added push_tinst_level to
get_defaulted_eh_spec to restore that context.

* method.c (walk_field_subobs): Remember errors from get_nsdmi.
(get_defaulted_eh_spec): Call push_tinst_level.
* pt.c (maybe_instantiate_noexcept): Keep error_mark_node.
* typeck2.c (merge_exception_specifiers): Handle error_mark_node.

From-SVN: r269032

Daily bump.

From-SVN: r269031

* config/gcn/gcn.c (print_operand): Fix typo.

From-SVN: r269028

compiler: add debugger-callable AST dump functins

    Introduce a set debug_go_* global functions that can be used to emit
    AST dumps for Go statements and expressions from within GDB (for use
    by people developing gccgo).

    Reviewed-on: https://go-review.googlesource.com/c/162903

From-SVN: r269027

Fix pr88850 test

Fix pr88850.c testcase which was failing in hardfp environments.

Committed as obvious.

    gcc/testsuite/
* gcc.target/arm/pr88850.c: Block -mfloat-abi override.

From-SVN: r269026

Makefile.am: Avoid the -D option which is not available with the install-sh fallback.

2019-02-19  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * src/Makefile.am: Avoid the -D option which is not available
        with the install-sh fallback.  Use $(MKDIR_P) instead.
        * libdruntime/Makefile.am: Likewise.
        * src/Makefile.in: Regenerated.
        * libdruntime/Makefile.in: Regenerated.

From-SVN: r269025

re PR fortran/89384 (CONTIGUOUS dummy argument in BIND(C) interface incorrect when actual is non-contiguous)

2019-02-19  Thomas Koenig  <tkoenig@gcc.gnu.org>

PR fortran/89384
* trans-expr.c (gfc_conv_gfc_desc_to_cfi_desc): If the dummy
argument is contiguous and the actual argument may not be,
use gfc_conv_subref_array_arg.

2019-02-19  Thomas Koenig  <tkoenig@gcc.gnu.org>

PR fortran/89384
* gfortran.dg/ISO_Fortran_binding_4.f90

From-SVN: r269024

unwind-dw2.c (_Unwind_GetGR): Compare regno instead of index to DWARF_ZERO_REG.

* unwind-dw2.c (_Unwind_GetGR) [DWARF_ZERO_REG]: Compare
regno instead of index to DWARF_ZERO_REG.

From-SVN: r269021

[PR87924] OpenACC wait clauses without async-arguments: remove XFAILs

... which the recent r269016 didn't do.

gcc/testsuite/
PR c/87924
* c-c++-common/goacc/asyncwait-5.c: Remove XFAILs.
* gfortran.dg/goacc/asyncwait-5.f: Likewise.

From-SVN: r269020

re PR go/89169 (FAIL: internal/cpu)

PR go/89169
    internal/cpu: do not require POWER8

    Although the gc toolchain requires POWER8, the gccgo toolchain does not.

    Fixes https://gcc.gnu.org/PR89169

    Reviewed-on: https://go-review.googlesource.com/c/162979

From-SVN: r269019

runtime: abort stack scan in cases that we cannot unwind the stack

    In signal-triggered stack scan, if the signal is delivered at
    certain bad time (e.g. in vdso, or in the middle of setcontext?),
    the unwinder may not be able to unwind the whole stack, while it
    still reports _URC_END_OF_STACK. So we cannot rely on _URC_END_OF_STACK
    to tell if it successfully scanned the stack. Instead, we check
    the last Go frame to see it actually reached the end of the stack.
    For Go-created stack, this is runtime.kickoff. For C-created
    stack, we need to record the outermost Go frame when it enters
    the Go side.

    Also we cannot unwind the stack if the signal is delivered in the
    middle of runtime.gogo, halfway through a goroutine switch, where
    the g and the stack don't match. Give up in this case as well.

    Reviewed-on: https://go-review.googlesource.com/c/159098

From-SVN: r269018

i386: Set ix86_fpmath to FPMATH_387 without SSE

ix86_fpmath should be set to combination of FPMATH_387 and FPMATH_SSE.
When SSE is disabled, it should be set to FPMATH_387 and 387 codegen is
also controlled by -msoft-float.

gcc/

PR target/89397
* config/i386/i386.c (ix86_option_override_internal): Set
opts->x_ix86_fpmath to FPMATH_387 when SSE is disabled.

gcc/testsuite/

PR target/89397
* gcc.target/i386/pr89397.c: New test.

From-SVN: r269017

re PR c/87924 (OpenACC wait clauses without async-arguments)

2019-02-19  Chung-Lin Tang <cltang@codesourcery.com>

PR c/87924
gcc/c/
* c-parser.c (c_parser_oacc_clause_wait): Add representation of wait
clause without argument as 'wait (GOMP_ASYNC_NOVAL)', adjust comments.

gcc/cp/
* parser.c (cp_parser_oacc_clause_wait): Add representation of wait
clause without argument as 'wait (GOMP_ASYNC_NOVAL)', adjust comments.

gcc/fortran/
* openmp.c (gfc_match_omp_clauses): Add representation of wait clause
without argument as 'wait (GOMP_ASYNC_NOVAL)'.

libgomp/
* oacc-parallel.c (GOACC_parallel_keyed): Remove condition on call to
goacc_wait().
(goacc_wait): Handle ACC_ASYNC_NOVAL case, remove goacc_thread() call
and related adjustment.

Reviewed-by: Thomas Schwinge <thomas@codesourcery.com>
From-SVN: r269016

re PR tree-optimization/88074 (g++ hangs on math expression)

2019-02-19  Richard Biener  <rguenther@suse.de>

        PR middle-end/88074
* toplev.c (do_compile): Initialize mpfr's exponent range
based on available float modes.

* gcc.dg/pr88074.c: New testcase.

From-SVN: r269015

Fix libphobos.shared/load.d compile failure on Solaris

2019-02-19  Iain Buclaw  <ibuclaw@gdcproject.org>

* testsuite/libphobos.shared/load.d: Import core.sys.posix.dlfcn.
[DragonFlyBSD, FreeBSD, linux, NetBSD, OSX, Solaris]: Import only
RTLD_NOLOAD from core.sys.*.dlfcn.
Assert RTLD_NOLOAD is available.

From-SVN: r269014

rtlanal.c (get_initial_register_offset): Fall back to the estimate as long as the epilogue isn't completed.

* rtlanal.c (get_initial_register_offset): Fall back to the estimate
as long as the epilogue isn't completed.

From-SVN: r269013

Fix libphobos linking on Solaris 11

* m4/druntime/libraries.m4 (DRUNTIME_LIBRARIES_NET): New macro.
* configure.ac: Invoke it.
* configure: Regenerate.

From-SVN: r269012

re PR middle-end/89303 (memory leak with shared_ptr and enable_shared_from_this)

PR middle-end/89303
* g++.dg/torture/pr89303.C: Move everything from std namespace to my
namespace.

From-SVN: r269010

re PR c++/89387 (ICE in maybe_generic_this_capture at gcc/cp/lambda.c:945 since r268851)

PR c++/89387
* lambda.c (maybe_generic_this_capture): Don't check
DECL_NONSTATIC_MEMBER_FUNCTION_P on USING_DECLs.

* g++.dg/cpp0x/lambda/lambda-89387.C: New test.

From-SVN: r269009

re PR c++/89391 (ICE in build_target_expr_with_type, at cp/tree.c:795)

PR c++/89391
* typeck.c (build_reinterpret_cast_1): Don't handle void to
&& conversion go through build_target_expr_with_type.

* g++.dg/cpp0x/reinterpret_cast2.C: New test.

From-SVN: r269008

re PR c++/89390 (ICE in get_string, at spellcheck-tree.h:46)

PR c++/89390
* error.c (qualified_name_lookup_error): Only call
suggest_alternative_in_scoped_enum if name is IDENTIFIER_NODE.

* g++.dg/diagnostic/pr89390.C: New test.

From-SVN: r269007

Adjust C++11/C++14 tests to work with -fchar8_t

* testsuite/21_strings/basic_string/literals/types.cc
[_GLIBCXX_USE_CHAR8_T]: Adjust expected string type for u8 literal.
* testsuite/21_strings/basic_string/literals/values.cc
[_GLIBCXX_USE_CHAR8_T]: Likewise.
* testsuite/22_locale/codecvt/char16_t.cc: Adjust for u8 literals
potentially having different type.
* testsuite/22_locale/codecvt/char32_t.cc: Likewise.
* testsuite/22_locale/codecvt/codecvt_utf8/79980.cc: Cast u8 literal
to char.
* testsuite/22_locale/codecvt/codecvt_utf8/wchar_t/1.cc: Likewise.
* testsuite/22_locale/codecvt/utf8.cc: Likewise.
* testsuite/22_locale/conversions/string/2.cc: Remove u8 prefix from
string literals only using basic character set.
* testsuite/22_locale/conversions/string/3.cc: Likewise. Cast other
u8 literals to char.
* testsuite/29_atomics/headers/atomic/macros.cc [_GLIBCXX_USE_CHAR8_T]:
Test ATOMIC_CHAR8_T_LOCK_FREE.
Add missing #error to ATOMIC_CHAR16_T_LOCK_FREE test.
* testsuite/29_atomics/headers/atomic/types_std_c++0x.cc
[_GLIBCXX_USE_CHAR8_T]: Check for std::atomic_char8_t.
* testsuite/experimental/string_view/literals/types.cc
[_GLIBCXX_USE_CHAR8_T]: Adjust expected string_view type for u8
literal.
* testsuite/experimental/string_view/literals/values.cc
[_GLIBCXX_USE_CHAR8_T]: Likewise.

From-SVN: r269006

P0482R5 char8_t: New standard library tests

2019-02-19  Tom Honermann  <tom@honermann.net>

* testsuite/18_support/numeric_limits/char8_t.cc: New test cloned
from char16_32_t.cc; validates numeric_limits<char8_t>.
* testsuite/21_strings/basic_string/literals/types-char8_t.cc: New
test cloned from types.cc; validates operator""s for char8_t
returns u8string.
* testsuite/21_strings/basic_string/literals/values-char8_t.cc: New
test cloned from values.cc; validates construction and comparison
of u8string values.
* testsuite/21_strings/basic_string/requirements/
/explicit_instantiation/char8_t/1.cc: New test cloned from
char16_t/1.cc; validates explicit instantiation of
basic_string<char8_t>.
* testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
New test cloned from types.cc; validates operator""sv for char8_t
returns u8string_view.
* testsuite/21_strings/basic_string_view/literals/
values-char8_t.cc: New test cloned from values.cc; validates
construction and comparison of u8string_view values.
* testsuite/21_strings/basic_string_view/requirements/
explicit_instantiation/char8_t/1.cc: New test cloned from
char16_t/1.cc; validates explicit instantiation of
basic_string_view<char8_t>.
* testsuite/21_strings/char_traits/requirements/char8_t/65049.cc:
New test cloned from char16_t/65049.cc; validates that
char_traits<char8_t> is not vulnerable to the concerns in PR65049.
* testsuite/21_strings/char_traits/requirements/char8_t/
typedefs.cc: New test cloned from char16_t/typedefs.cc; validates
that char_traits<char8_t> member typedefs are present and correct.
* testsuite/21_strings/char_traits/requirements/
explicit_instantiation/char8_t/1.cc: New test cloned from
char16_t/1.cc; validates explicit instantiation of
char_traits<char8_t>.
* testsuite/22_locale/codecvt/char16_t-char8_t.cc: New test cloned
from char16_t.cc: validates
codecvt<char16_t, char8_t, mbstate_t>.
* testsuite/22_locale/codecvt/char32_t-char8_t.cc: New test cloned
from char32_t.cc: validates
codecvt<char32_t, char8_t, mbstate_t>.
* testsuite/22_locale/codecvt/utf8-char8_t.cc: New test cloned from
utf8.cc; validates codecvt<char16_t, char8_t, std::mbstate_t> and
codecvt<char32_t, char8_t, std::mbstate_t>.
* testsuite/27_io/filesystem/path/native/string-char8_t.cc: New
test cloned from string.cc; validates filesystem::path construction
from char8_t input.
* testsuite/experimental/feat-char8_t.cc: New test; validates that
the __cpp_lib_char8_t feature test macro is defined with the
correct value.
* testsuite/experimental/filesystem/path/native/string-char8_t.cc:
New test cloned from string.cc; validates filesystem::path
construction from char8_t input.
* testsuite/experimental/string_view/literals/types-char8_t.cc: New
test cloned from types.cc; validates operator""sv for char8_t
returns u8string_view.
* testsuite/experimental/string_view/literals/values-char8_t.cc:
New test cloned from values.cc; validates construction and
comparison of u8string_view values.
* testsuite/experimental/string_view/requirements/
explicit_instantiation/char8_t/1.cc: New test cloned from
char16_t/1.cc; validates explicit instantiation of
basic_string_view<char8_t>.
* testsuite/ext/char8_t/atomic-1.cc: New test; validates that
ATOMIC_CHAR8_T_LOCK_FREE is not defined if char8_t support is not
enabled.

From-SVN: r269005

P0482R5 char8_t: Standard library support

gcc/cp:

2019-02-19  Tom Honermann  <tom@honermann.net>

* name-lookup.c (get_std_name_hint): Added u8string as a name hint.

libstdc++:

2019-02-19  Tom Honermann  <tom@honermann.net>

P0482R5 char8_t: Standard library support
* config/abi/pre/gnu-versioned-namespace.ver (CXXABI_2.0): Add
typeinfo symbols for char8_t.
* config/abi/pre/gnu.ver: Add CXXABI_1.3.12.
(GLIBCXX_3.4.26): Add symbols for specializations of
numeric_limits and codecvt that involve char8_t.
(CXXABI_1.3.12): Add typeinfo symbols for char8_t.
* include/bits/atomic_base.h: Add atomic_char8_t.
* include/bits/basic_string.h: Add std::hash<u8string> and
operator""s(const char8_t*, size_t).
* include/bits/c++config: Define _GLIBCXX_USE_CHAR8_T and
__cpp_lib_char8_t.
* include/bits/char_traits.h: Add char_traits<char8_t>.
* include/bits/codecvt.h: Add
codecvt<char16_t, char8_t, mbstate_t>,
codecvt<char32_t, char8_t, mbstate_t>,
codecvt_byname<char16_t, char8_t, mbstate_t>, and
codecvt_byname<char32_t, char8_t, mbstate_t>.
* include/bits/cpp_type_traits.h: Add __is_integer<char8_t> to
recognize char8_t as an integral type.
* include/bits/fs_path.h: (path::__is_encoded_char): Recognize
char8_t.
(path::u8string): Return std::u8string when char8_t support is
enabled.
(path::generic_u8string): Likewise.
(path::_S_convert): Handle conversion from char8_t input.
(path::_S_str_convert): Likewise.
* include/bits/functional_hash.h: Add hash<char8_t>.
* include/bits/locale_conv.h (__str_codecvt_out): Add overloads for
char8_t.
* include/bits/locale_facets.h (_GLIBCXX_NUM_UNICODE_FACETS): Bump
for new char8_t specializations.
* include/bits/localefwd.h: Add missing declarations of
codecvt<char16_t, char, mbstate_t> and
codecvt<char32_t, char, mbstate_t>.  Add char8_t declarations
codecvt<char16_t, char8_t, mbstate_t> and
codecvt<char32_t, char8_t, mbstate_t>.
* include/bits/postypes.h: Add u8streampos
* include/bits/stringfwd.h: Add declarations of
char_traits<char8_t> and u8string.
* include/c_global/cstddef: Add __byte_operand<char8_t>.
* include/experimental/bits/fs_path.h (path::__is_encoded_char):
Recognize char8_t.
(path::u8string): Return std::u8string when char8_t support is
enabled.
(path::generic_u8string): Likewise.
(path::_S_convert): Handle conversion from char8_t input.
(path::_S_str_convert): Likewise.
* include/experimental/string: Add u8string.
* include/experimental/string_view: Add u8string_view,
hash<experimental::u8string_view>, and
operator""sv(const char8_t*, size_t).
* include/std/atomic: Add atomic<char8_t> and atomic_char8_t.
* include/std/charconv (__is_int_to_chars_type): Recognize char8_t
as a character type.
* include/std/limits: Add numeric_limits<char8_t>.
* include/std/string_view: Add u8string_view,
hash<experimental::u8string_view>, and
operator""sv(const char8_t*, size_t).
* include/std/type_traits: Add __is_integral_helper<char8_t>,
__make_unsigned<char8_t>, and __make_signed<char8_t>.
* libsupc++/atomic_lockfree_defines.h: Define
ATOMIC_CHAR8_T_LOCK_FREE.
* src/c++11/Makefile.am: Compile with -fchar8_t when compiling
codecvt.cc and limits.cc so that char8_t specializations of
numeric_limits and codecvt and emitted.
* src/c++11/Makefile.in: Likewise.
* src/c++11/codecvt.cc: Define members of
codecvt<char16_t, char8_t, mbstate_t>,
codecvt<char32_t, char8_t, mbstate_t>,
codecvt_byname<char16_t, char8_t, mbstate_t>, and
codecvt_byname<char32_t, char8_t, mbstate_t>.
* src/c++11/limits.cc: Define members of
numeric_limits<char8_t>.
* src/c++98/Makefile.am: Compile with -fchar8_t when compiling
locale_init.cc and localename.cc.
* src/c++98/Makefile.in: Likewise.
* src/c++98/locale_init.cc: Add initialization for the
codecvt<char16_t, char8_t, mbstate_t> and
codecvt<char32_t, char8_t, mbstate_t> facets.
* src/c++98/localename.cc: Likewise.
* testsuite/util/testsuite_abi.cc: Validate ABI bump.

From-SVN: r269004

PR c++/89336 - multiple stores in constexpr stmt.

If we evaluate the RHS in the context of the LHS, that evaluation might
change the LHS in ways that mess with being able to store the value later.
So for assignment or scalar values, evaluate the RHS first.

* constexpr.c (cxx_eval_store_expression): Preevaluate scalar or
assigned value.

From-SVN: r269003

Daily bump.

From-SVN: r269002