Fix failures on Solaris with -fno-common default

gcc/testsuite:
* gcc.c-torture/execute/20030913-1.c: Rename glob to g.
* gcc.c-torture/execute/960218-1.c: Rename glob to gl.
* gcc.c-torture/execute/complex-6.c: Rename err to e.
* gcc.dg/torture/ssa-pta-fn-1.c: Rename glob to g.

libgomp:
* testsuite/libgomp.c/pr39591-1.c: Rename err to e.
* testsuite/libgomp.c/pr39591-2.c: Likewise.
* testsuite/libgomp.c/pr39591-3.c: Likewise.
* testsuite/libgomp.c/private-1.c: Likewise.
* testsuite/libgomp.c/task-1.c: Likewise.
* testsuite/libgomp.c/task-5.c: Renamed err to serr.

From-SVN: r278571

PR c++/92450 - ICE with invalid nested name specifier.

* parser.c (cp_parser_member_declaration): Don't attempt to print
erroneous bit-field diagnostic if grokdeclarator returns
error_mark_node.

* g++.dg/parse/crash71.C: New test.

From-SVN: r278570

Avoid quadratic behaviour of update_callee_keys.

* ipa-inline.c (update_callee_keys): Add parameter UPDATE_SINCE.
(resolve_noninline_speculation, inline_small_functions): Avoid
redundant updates.

From-SVN: r278566

Fix global_vars_f90_init test failure

Add a missing extern to ensure the test passes with -fno-common change.
Committed as obvious.

    testsuite/
* gfortran.dg/global_vars_f90_init_driver.c: Add missing extern.

From-SVN: r278557

lra.c (lra_insn_recog_data_pool): New.

2019-11-21  Richard Biener  <rguenther@suse.de>

* lra.c (lra_insn_recog_data_pool): New.
(free_insn_recog_data): Adjust.
(finish_insn_recog_data): Release lra_insn_recog_data_pool.
(lra_set_insn_recog_data): Allocate from lra_insn_recog_data_pool.

From-SVN: r278556

re PR tree-optimization/92596 (ICE in exact_div, at poly-int.h:2162 since r278406)

2019-11-21  Richard Biener  <rguenther@suse.de>

PR tree-optimization/92596
* tree-vect-slp.c (vect_build_slp_tree): Fix pasto.

* gcc.dg/torture/pr92596-1.c: New testcase.

From-SVN: r278555

Fix previous commit.

        * ipa-prop.h (ipa_release_agg_values): Add parameter RELEASE_VECTOR.

From-SVN: r278554

ipa-fnsummary.c (evaluate_conditions_for_known_args): Be ready for some vectors to not be allocated.

* ipa-fnsummary.c (evaluate_conditions_for_known_args): Be
ready for some vectors to not be allocated.
(evaluate_properties_for_edge): Document better; make
known_vals and known_aggs caller allocated; avoid determining
values of parameters which are not used.
(ipa_merge_fn_summary_after_inlining): Pre allocate known_vals and
known_aggs.
* ipa-inline-analysis.c (do_estimate_edge_time): Likewise.
(do_estimate_edge_size): Likewise.
(do_estimate_edge_hints): Likewise.
* ipa-cp.c (ipa_get_indirect_edge_target_1): Do not early exit when
values are not known.
(ipa_release_agg_values): Add option to not release vector itself.

From-SVN: r278553

Testsuite: Fix fp-int-convert-timode-1.c testism.

The test fp-int-convert-timode-1.c uses FE_TONEAREST without
actually checking if the target has defined it.

Like the rest of the tests I now add a check to see if the target
has actually implemented it.

This fixed Arm newlib target failures.

Regtested on aarch64-none-elf and aarch64_be-none-elf and no issues.

Committed under the GCC obvious rules.

gcc/testsuite/ChangeLog:

* gcc.dg/torture/fp-int-convert-timode-1.c: Add check for FE_TONEAREST.

From-SVN: r278552

cfgloop.h (loop_iterator::~loop_iterator): Remove.

2019-11-21  Richard Biener  <rguenther@suse.de>

* cfgloop.h (loop_iterator::~loop_iterator): Remove.
(loop_iterator::to_visit): Use an auto_vec with internal storage.
(loop_iterator::loop_iterator): Adjust.
* cfganal.c (compute_dominance_frontiers_1): Fold into...
(compute_dominance_frontiers): ... this.  Hoist invariant
get_immediate_dominator call.
(compute_idf): Use a work-set instead of a work-list for more
optimal iteration order and duplicate avoidance.
* tree-into-ssa.c (mark_phi_for_rewrite): Avoid re-allocating
the vector all the time, instead pre-allocate the vector only
once.
(delete_update_ssa): Simplify.
* vec.h (va_heap::release): Disable -Wfree-nonheap-object around it.

From-SVN: r278550

[AArch64] Add -fno-vect-cost-model to sve2/whilerw_1.c

Bumping the cost of vec_to_scalar made the .s loop in
gcc.target/aarch64/sve2/whilerw_1.c use a runtime profitability check,
like the .d version already did.  Since the cost model isn't really
being tested here, the most robust fix seemed to be to disable it,
which I should really have done from the outset.

2019-11-21  Richard Sandiford  <richard.sandiford@arm.com>

gcc/testsuite/
* gcc.target/aarch64/sve2/whilerw_1.c: Add -fno-vect-cost-model.
Require x0 in the .d test too.

From-SVN: r278549

re PR tree-optimization/91355 (optimized code does not call destructor while unwinding after exception)

PR tree-optimization/91355
* tree-ssa-sink.c (select_best_block): Use >= rather than >
for early_bb scaled count with best_bb count comparison.

* g++.dg/torture/pr91355.C: New test.

From-SVN: r278548

[Darwin, testsuite] Fix fail of gnu2x-attrs-1.c.

This test fails on targets without symbol alias support, but we don't
want to skip it entirely with the usual dg-requires, thus expect the
error on the alias line.

gcc/testsuite/ChangeLog:

2019-11-21  Iain Sandoe  <iain@sandoe.co.uk>

* gcc.dg/gnu2x-attrs-1.c: Expect an error for the alias case
on Darwin.

From-SVN: r278547

ipa-fnsummary.h (enum ipa_hints_vals): Fix comment typo, preffer -> prefer.

* ipa-fnsummary.h (enum ipa_hints_vals): Fix comment typo,
preffer -> prefer.
* ipa-inline.c (edge_badness): Likewise.
* lto-streamer.h (class lto_location_cache): Likewise.
* tree-ssa-sink.c (select_best_block): Likewise.  Fix comment typos,
gratutious -> gratuitous.

From-SVN: r278546

revert: re PR tree-optimization/91790 (ICE: verify_ssa failed (error: definition in block 2 follows the use))

2019-11-21  Richard Biener  <rguenther@suse.de>

Revert
2019-09-17  Richard Biener  <rguenther@suse.de>

PR tree-optimization/91790
* tree-vect-stmts.c (vectorizable_load): For BB vectorization
use the correct DR for setting up realignment.

From-SVN: r278544

cfganal.c (pre_and_rev_post_order_compute_fn): Use an auto_bb_flag instead of an sbitmap for visited handling.

2019-11-21  Richard Biener  <rguenther@suse.de>

* cfganal.c (pre_and_rev_post_order_compute_fn): Use an
auto_bb_flag instead of an sbitmap for visited handling.
* lra.c (lra_insn_recog_data_pool): New.
(free_insn_recog_data): Adjust.
(finish_insn_recog_data): Release lra_insn_recog_data_pool.
(lra_set_insn_recog_data): Allocate from lra_insn_recog_data_pool.
* tree-ssa-structalias.c (equiv_class_hasher): Change to nofree.
(equiv_class_obstack): New.
(equiv_class_lookup_or_add): Allocate from equiv_class_obstack.
(perform_var_substitution): Initialize equiv_class_obstack.
(free_var_substitution_info): Free equiv_class_obstack.

From-SVN: r278543

Avoid quadratic behaviour of early inliner.

* ipa-inline.c (want_early_inline_function_p): Do not estimate
edge growth when callee function is very large.
* ipa-inline.h (estimate_min_edge_growth): New.

From-SVN: r278542

Incremental updating of inline summaries.

        * ipa-fnsummary.c (ipa_fn_summary::account_size_time): Allow
negative time in calls summary; correct roundoff errors
leading to negative times.
(ipa_merge_fn_summary_after_inlining): Update calls size time table
if present.
(ipa_update_overall_fn_summary): Add RESET parameter.
* ipa-fnsummary.h (ipa_update_overall_fn_summary): Update prototype.
* ipa-inline-transform.c (inline_call): Enable incremental updates.

From-SVN: r278541

re PR go/92605 (r278509 causes/reveals issue in building go library)

PR go/92605
    runtime: declare runtime_usestackmaps in stack.c, not runtime.h

    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/208161

From-SVN: r278540

mksysinfo: use type aliases for time struct field types

    Also fix a case where grep wasn't redirecting to /dev/null.

    Fixes golang/go#35713

    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/208160

From-SVN: r278539

re PR c++/90842 (ICE in poplevel, at cp/decl.c:585)

PR c++/90842
* parser.c (cp_parser_decl_specifier_seq): For concept or typedef
break early if CP_PARSER_FLAGS_ONLY_MUTABLE_OR_CONSTEXPR.
For type specifiers, set CP_PARSER_FLAGS_NO_TYPE_DEFINITIONS
if CP_PARSER_FLAGS_ONLY_MUTABLE_OR_CONSTEXPR is set.

* g++.dg/cpp1y/lambda-generic-90842.C: New test.

Co-Authored-By: Jason Merrill <jason@redhat.com>
From-SVN: r278538

Daily bump.

From-SVN: r278537

Add test for PR c++/92443.

* g++.dg/cpp0x/constexpr-92443.C: New test.

From-SVN: r278534

Restore stmt def types after scheduling two-operation SLP

2019-11-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* tree-vect-slp.c (vect_schedule_slp_instance): Restore stmt
def types for two-operation SLP.

From-SVN: r278533

Restrict bb-slp-40.c to targets with VnQI addition (PR 92366)

bb-slp-40.c fails on SPARC targets without VIS4 because it
requires addition on vectors of bytes.  There doesn't seem to be
an existing target selector for this, so I added vect_char_add.
(Wasn't sure whether to use vect_char_add, for consistency
with vect_no_int_add/vect_int_mult etc., or vect_add_char for
consistency with vect_shift_char etc.)

I took the target list from vect_int and removed targets that didn't
seem to support the operation (namely sparc*, since we don't seem to
have any test for VIS4, niagara7 or m8, and alpha*-*-*.)

2019-11-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
PR testsuite/92366
* doc/sourcebuild.texi (vect_char_add): Document.

gcc/testsuite/
PR testsuite/92366
* lib/target-supports.exp (check_effective_target_vect_char_add):
New proc.
* gcc.dg/vect/bb-slp-40.c: Require vect_char_add instead of vect_int.

From-SVN: r278532

Adjust expected output for bb-slp-21.c (PR 92527)

After r278246, we can try building the out[] store value from scalars
if the target has no multiplication support.  That's not necessarily
a good thing, but like most of vect/, this test is run with the cost
model disabled.

2019-11-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/testsuite/
PR testsuite/92527
* gcc.dg/vect/bb-slp-21.c: Expect both SLP groups to be vectorized,
regardless of whether the target supports multiplication.

From-SVN: r278531

typeck2.c (build_x_arrow): Early return if decay_conversion returns error_mark_node.

/gcc
2019-11-20  Paolo Carlini  <paolo.carlini@oracle.com>

* typeck2.c (build_x_arrow): Early return if decay_conversion
returns error_mark_node.

/testsuite
2019-11-20  Paolo Carlini  <paolo.carlini@oracle.com>

* g++.dg/parse/error43.C: Adjust expected error.

From-SVN: r278530

drop attempt to reuse cgraph callees for -fcallgraph-info

The information in cgraph callees is released long before we get to
the point in which -fcallgraph-info edges are dumped, or even
expanded.  It doesn't make sense to retain it longer: the edges
created for -fcallgraph-info are much smaller, and they don't even
coexist, so not even peak use grows.

for  gcc/ChangeLog

* function.h (CALLEE_FROM_CGRAPH_P): Remove.
* function.c (record_final_call): Record even calls that might
have been in the cgraph.
* toplev.c (dump_final_node_vcg): Skip iteration over cgraph
callees.

From-SVN: r278529

Switch gcc ftp URL's to https

The FTP protocol is getting long in the tooth, and we should emphasize
HTTPS where that is available. This patch changes various gcc.gnu.org
URL's to instead use HTTPS.

For instance, kernel.org shut down FTP access in 2017, with the
explanation:

- The protocol is inefficient and requires adding awkward kludges to
  firewalls and load-balancing daemons
- FTP servers have no support for caching or accelerators, which has
  significant performance impacts
- Most software implementations have stagnated and see infrequent
  updates

ChangeLog:

2019-11-20  Janne Blomqvist  <jb@gcc.gnu.org>

        * configure.ac: Use https for gcc.gnu.org.
        * configure: Regenerated.

gcc/ChangeLog:

2019-11-20  Janne Blomqvist  <jb@gcc.gnu.org>

        * configure.ac: Use https for gcc.gnu.org.
        * configure: Regenerated.
        * doc/install.texi: Use https for gcc.gnu.org.
        * doc/sourcebuild.texi: Likewise.

gcc/testsuite/ChangeLog:

2019-11-20  Janne Blomqvist  <jb@gcc.gnu.org>

        * README: Use https for gcc.gnu.org.

libstdc++-v3/ChangeLog:

2019-11-20  Janne Blomqvist  <jb@gcc.gnu.org>

        * doc/html/api.html: Use https for gcc.gnu.org.
        * doc/xml/api.xml: Likewise.

maintainer-scripts/ChangeLog:

2019-11-20  Janne Blomqvist  <jb@gcc.gnu.org>

        * gcc_release: Use https for gcc.gnu.org.

From-SVN: r278526

PR 92463 MPFR modernization: Revert r269139

Commit r269139 fixed an accidental dependency on MPFR 3.0. As we now
require at least MPFR 3.1.0+ we can revert it and instead use the
simpler MPFR 3.0+ code.

ChangeLog entry of the original commit was:

2019-02-23  David Malcolm  <dmalcolm@redhat.com>
            Jakub Jelinek  <jakub@redhat.com>

        PR middle-end/88074
        * simplify.c (norm2_do_sqrt, gfc_simplify_norm2): Use
        mpfr_number_p && !mpfr_zero_p instead of mpfr_regular_p.
        (norm2_add_squared): Likewise.  Use mp_exp_t rather than mpfr_exp_t.

ChangeLog for this commit:

2019-11-20  Janne Blomqvist  <jb@gcc.gnu.org>

PR fortran/92463
Revert r269139
* simplify.c (norm2_do_sqrt, gfc_simplify_norm2): Use
mpfr_regular_p instead of mpfr_number_p && !mpfr_zero_p.
(norm2_add_squared): Likewise.  Use mpfr_exp_t rather than
mp_exp_t.

From-SVN: r278525

PR 92463 MPFR modernization in GFortran

Now that we require a minimum of MPFR 3.1.0+ to build GCC, we can do
some modernization of the MPFR usage in the GFortran frontend.

This patch replaces

1) GMP_RND* with MPFR_RND*

2) mp_exp_t with mpfr_exp_t

3) mp_prec_t with mpfr_prec_t

4) mp_rnd_t with mpfr_rnd_t

gcc/fortran/ChangeLog:

2019-11-20  Janne Blomqvist  <jb@gcc.gnu.org>

PR fortran/92463
* arith.c (gfc_mpfr_to_mpz): Change mp_exp_t to mpfr_exp_t.
(gfc_check_real_range): Likewise.
* gfortran.h (GFC_RND_MODE): Change GMP_RNDN to MPFR_RNDN.
* module.c (mio_gmp_real): Change mp_exp_t to mpfr_exp_t.
* simplify.c (degrees_f): Change mp_rnd_t to mpfr_rnd_t.
(radians_f): Likewise.
(fullprec_erfc_scaled): Change mp_prec_t to mpfr_prec_t.
(asympt_erfc_scaled): Likewise.
(gfc_simplify_nearest): Change mp_exp_t to mpfr_exp_t, and
GMP_RND* to MPFR_RND*.

From-SVN: r278523

[AArch64] Fix vrbit_1.c test failure

The vrbit_1 test which was missing a flag to disable code sharing.
Committed as obvious.

    testsuite/
* gcc.target/aarch64/simd/vrbit_1.c: Add -fno-ipa-icf.

From-SVN: r278519

AMD GCN symbol output with null cfun

gcc/
* config/gcn/gcn.c (gcn_asm_output_symbol_ref): Handle null cfun.

Reviewed-by: Andrew Stubbs <ams@codesourcery.com>
From-SVN: r278518

AMD GCN libgomp plugin queue-full condition locking fix

libgomp/
* plugin/plugin-gcn.c (wait_for_queue_nonfull): Don't lock/unlock
aq->mutex here.
(queue_push_launch): Lock aq->mutex before calling
wait_for_queue_nonfull.
(queue_push_callback): Likewise.
(queue_push_asyncwait): Likewise.
(queue_push_placeholder): Likewise.

Reviewed-by: Andrew Stubbs <ams@codesourcery.com>
From-SVN: r278517

Fix host-to-device copies from rodata for AMD GCN

libgomp/
* plugin/plugin-gcn.c (hsa_memory_copy_wrapper): New.
(copy_data, GOMP_OFFLOAD_host2dev): Use above function.
(GOMP_OFFLOAD_dev2host, GOMP_OFFLOAD_dev2dev): Check hsa_memory_copy
return code.

Reviewed-by: Andrew Stubbs <ams@codesourcery.com>
From-SVN: r278516

jit: fix ICE with GCC_JIT_BOOL_OPTION_SELFCHECK_GC since r278084 (PR jit/92483)

Since r278084 (part of the params refactoring), most of libgccjit's
test suite has been ICEing.

The root cause is that jit-playback.c injects params to its fake_args
here:

  /* Aggressively garbage-collect, to shake out bugs: */
  if (get_bool_option (GCC_JIT_BOOL_OPTION_SELFCHECK_GC))
    {
      ADD_ARG ("--param");
      ADD_ARG ("ggc-min-expand=0");
      ADD_ARG ("--param");
      ADD_ARG ("ggc-min-heapsize=0");
    }

(building a vec of char * where the char * are allocated using xstrdup)

and r278084 added this logic to decode_cmdline_options_to_array:

964       /* Interpret "--param" "key=name" as "--param=key=name".  */
965       const char *needle = "--param";
966       if (i + 1 < argc && strcmp (opt, needle) == 0)
967 {
968   const char *replacement
969     = opts_concat (needle, "=", argv[i + 1], NULL);
970   argv[++i] = replacement;
971 }

Note that at line 970 it manipulates the argv in-place, inserting a
new option allocated with opts_concat, which uses opts_obstack
(itself initialized from toplev::main).

jit-playback.c cleans up its fake arguments using "free", at which
point we have a free of the middle of an obstack and an ICE.

This patch fixes the issue by using the new syntax for the params.

Fixes all 60 FAILs in jit.sum, restoring the number of PASS results
from 2033 to 10469.

gcc/jit/ChangeLog:
PR jit/92483
* jit-playback.c (gcc::jit::playback::context::make_fake_args):
Update GCC_JIT_BOOL_OPTION_SELFCHECK_GC for new --param syntax.

From-SVN: r278515

OpenACC "present" subarrays: runtime API return value and unmapping fixes

PR libgomp/92511

libgomp/
* oacc-mem.c (present_create_copy): Fix device pointer return value in
case of "present" subarray.  Use tgt->tgt_start instead of tgt->to_free
in non-present/create case.
(delete_copyout): Change error condition to fail only on copies outside
of mapped block.  Adjust error message accordingly.
* testsuite/libgomp.oacc-c-c++-common/copyin-devptr-1.c: New test.
* testsuite/libgomp.oacc-c-c++-common/copyin-devptr-2.c: New test.
* testsuite/libgomp.oacc-c-c++-common/lib-20.c: Adjust expected error
message.
* testsuite/libgomp.oacc-c-c++-common/lib-23.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/lib-22.c: Allow test to pass now.
* testsuite/libgomp.oacc-c-c++-common/lib-30.c: Likewise.

Reviewed-by: Thomas Schwinge <thomas@codesourcery.com>
From-SVN: r278514

Implement inline call summaries.

* ipa-fnsummary.c (ipa_fn_summary::account_size_time): Add CALL
parameter and update call_size_time_table.
(ipa_fn_summary::max_size_time_table_size): New constant.
(estimate_calls_size_and_time_1): Break out from ...
(estimate_calls_size_and_time): ... here; implement summary production.
(summarize_calls_size_and_time): New function.
(ipa_call_context::estimate_size_and_time): Bypass
estimate_calls_size_and_time for leaf functions.
(ipa_update_overall_fn_summary): Likewise.
* ipa-fnsummary.h (call_size_time_table): New.
(ipa_fn_summary::account_size_time): Update prototype.

From-SVN: r278513

Document -Wc11-c2x-compat.

My patch that added initial C2X support and associated command-line
options missed documenting -Wc11-c2x-compat although the other options
were properly documented.  This patch adds the missing documentation.

Tested with "make info" and "make pdf".

* doc/invoke.texi (-Wc11-c2x-compat): Document.

From-SVN: r278510

PR85678: Change default to -fno-common

GCC currently defaults to -fcommon.  As discussed in the PR, this is an ancient
C feature which is not conforming with the latest C standards.  On many targets
this means global variable accesses have a codesize and performance penalty.
This applies to C code only, C++ code is not affected by -fcommon.  It is about
time to change the default.

    gcc/
PR85678
* common.opt (fcommon): Change init to 1.
* invoke.texi (-fcommon): Update documentation.

    testsuite/
* g++.dg/lto/odr-6_1.c: Add -fcommon.
* gcc.dg/alias-15.c: Likewise.
* gcc.dg/fdata-sections-1.c: Likewise.
* gcc.dg/ipa/pr77653.c: Likewise.
* gcc.dg/lto/20090729_0.c: Likewise.
* gcc.dg/lto/20111207-1_0.c: Likewise.
* gcc.dg/lto/c-compatible-types-1_0.c: Likewise.
* gcc.dg/lto/pr55525_0.c: Likewise.
* gcc.dg/lto/pr88077_0.c: Use long to avoid alignment warning.
* gcc.dg/lto/pr88077_1.c: Add -fcommon.
* gcc.target/aarch64/sve/peel_ind_1.c: Allow ANCHOR0.
* gcc.target/aarch64/sve/peel_ind_2.c: Likewise.
* gcc.target/aarch64/sve/peel_ind_3.c: Likewise.
* gcc.target/i386/volatile-bitfields-2.c: Allow movl or movq.

From-SVN: r278509

libgomp/test: Add flags to find libatomic in build-tree testing

Add flags to find libatomic in build-tree testing, fixing a catastrophic
libgomp testsuite failure with `riscv*-*-linux*' targets, which imply
`-latomic' with the `-pthread' GCC option, implied in turn by the
`-fopenacc' and `-fopenmp' options, removing failures like:

.../bin/riscv64-linux-gnu-ld: cannot find -latomic
collect2: error: ld returned 1 exit status
compiler exited with status 1
FAIL: libgomp.c/../libgomp.c-c++-common/atomic-18.c (test for excess errors)
Excess errors:
.../bin/riscv64-linux-gnu-ld: cannot find -latomic

UNRESOLVED: libgomp.c/../libgomp.c-c++-common/atomic-18.c compilation failed to produce executable

and bringing overall test results for the `riscv64-linux-gnu' target
(here with the `x86_64-linux-gnu' host and RISC-V QEMU in the Linux user
emulation mode as the target board) from:

=== libgomp Summary ===

# of expected passes 90
# of unexpected failures 3267
# of expected failures 2
# of unresolved testcases 3247
# of unsupported tests 548

to:

=== libgomp Summary ===

# of expected passes 6834
# of unexpected failures 4
# of expected failures 4
# of unsupported tests 518

libgomp/
* testsuite/lib/libgomp.exp (libgomp_init): Add flags to find
libatomic in build-tree testing.

From-SVN: r278505

Workaround bogus warning in fibonacci_heap<K,V>::consolidate.

* fibonacci_heap.h (fibonacci_heap<K,V>::consolidate): Turn auto_vec
to ordinary array.

From-SVN: r278504

Add pool_allocator for fibonaci heaps.

* fibonacci_heap.h (fibonacci_heap<K,V>::fibonacci_heap):
Add allocator parameter.
(fibonacci_heap<K,V>::~fibonacci_heap): Optimize destruction.
(fibonacci_heap<K,V>::m_allocator): New.
(fibonacci_heap<K,V>::m_own_allocator): New.
(fibonacci_heap<K,V>::insert): Use allocator.
(fibonacci_heap<K,V>::extract_min): Likewise.
(fibonacci_heap<K,V>::union_with): Assert that both heaps share
allocator.
(fibonacci_heap<K,V>::consolidate): Allocate constant sized vector
on stack.
* fibonacci_heap.c: Include alloc-pool
(test_empty_heap): Initialize allocator.
(test_union): Likewise.
* bb-reorder.c: Include alloc-pool.h.
* tracer.c: Inlclude alloc-pool.h.

From-SVN: r278501

Update comment in libsanitizer/*/libtool-version files.

2019-11-20  Martin Liska  <mliska@suse.cz>

* libtool-version: Remove.
* lsan/libtool-version: Upate comment to not mention libmudflap.
* tsan/libtool-version: Likewise.
* ubsan/libtool-version: Likewise.

From-SVN: r278500

lto-streamer-out.c (DFS::sccstack): Turn into auto-vec.

* lto-streamer-out.c (DFS::sccstack): Turn into auto-vec.
Preallocate for 32 entries.
(DFS::worklist): Likewise.
(DFS::DFS): Do not initialize sccstack and worklist.
(DFS::~DFS): Do not release sccstack.

From-SVN: r278498

rs6000: Fix UNORDERED without NaNs, for DFP (PR92573)

This is the analogue of r278103, but for DFP.

PR target/92573
* config/rs6000/dfp.md (dfptstsfi_<code>_<mode> for DFP_TEST and DDTD):
Handle UNORDERED if !HONOR_NANS.

From-SVN: r278497

Optimize updating of badness after applying inline

        * ipa-inline.c (wrapper_heuristics_may_apply): Break out from ...
(edge_badness): ... here.
(inline_small_functions): Use monotonicity of badness calculation
to avoid redundant updates.

From-SVN: r278496

tree-vect-slp.c (vect_analyze_slp_instance): Dump constructors we are actually analyzing.

2019-11-20  Richard Biener  <rguenther@suse.de>

* tree-vect-slp.c (vect_analyze_slp_instance): Dump
constructors we are actually analyzing.
(vect_slp_check_for_constructors): Do not vectorize uniform
constuctors, do not dump here.

* gcc.dg/vect/bb-slp-42.c: Adjust.
* gcc.dg/vect/bb-slp-40.c: Likewise.

From-SVN: r278495

re PR tree-optimization/92537 (ICE in vect_slp_analyze_node_operations, at tree-vect-slp.c:2775)

2019-11-20  Richard Biener  <rguenther@suse.de>

PR tree-optimization/92537
* tree-vect-slp.c (vect_analyze_slp_instance): Move CTOR
vectorization validity check...
(vect_slp_analyze_operations): ... here.

* gfortran.dg/pr92537.f90: New testcase.

From-SVN: r278494

[testsuite][arm] Fix asm-flag-[45].c tests

In asm-flag-4.c, we need to use dg-message instead of dg-error because
we have to match "sorry, unimplemented:" rather than "error:".  In
asm-flag-5.c, fix the dg-error syntax.

2019-11-20  Christophe Lyon  <christophe.lyon@linaro.org>

* gcc.target/arm/asm-flag-4.c: Replace dg-error with dg-message.
* gcc.target/arm/asm-flag-5.c: Add quotes around dg-error
messages.

From-SVN: r278487

Remove my name from AArch64 port maintainers

* MAINTAINERS (aarch64 port): Remove my name, move to...
(Write After Approval): ...Here.

From-SVN: r278486

[ARC] Register ARC specific passes with a .def file.

New arc-passes.def to register ARC specific passes.

gcc/
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

* config/arc/arc-protos.h (make_pass_arc_ifcvt): Declare.
(make_pass_arc_predicate_delay_insns): Likewise.
* config/arc/arc.c (class pass_arc_ifcvt): Reformat text, add gate
method, remove clone.
(class pass_arc_predicate_delay_insns): Likewise.
(arc_init): Remove registering of ARC specific passes.
* config/arc/t-arc (PASSES_EXTRA): Add arc-passes.def.
* config/arc/arc-passes.def: New file.

From-SVN: r278485

re PR c++/90767 (jumbled error message with this and const)

PR c++/90767
* call.c (complain_about_no_candidates_for_method_call): If
conv->from is not a type, pass to complain_about_bad_argument
lvalue_type of conv->from.

* g++.dg/diagnostic/pr90767-1.C: New test.
* g++.dg/diagnostic/pr90767-2.C: New test.

From-SVN: r278484

re PR middle-end/90840 (ICE in simplify_subreg, at simplify-rtx.c:6441)

PR middle-end/90840
* expmed.c (store_bit_field_1): Handle the case where op0 is not a MEM
and has a mode that doesn't have corresponding integral type.

* gcc.c-torture/compile/pr90840.c: New test.

From-SVN: r278483

re PR target/90867 (Multiplication or typecast of integer and double always zero when...)

PR target/90867
* config/i386/i386-options.c (ix86_valid_target_attribute_tree): Don't
clear opts->x_ix86_isa_flags{,2} here...
(ix86_valid_target_attribute_inner_p): ... but here when seeing
arch=.  Also clear opts->x_ix86_isa_flags{,2}_explicit.

* gcc.target/i386/pr90867.c: New test.

From-SVN: r278482

re PR c/90898 (ICE in insert_clobber_before_stack_restore, at tree-ssa-ccp.c:2112)

PR c/90898
* tree-ssa-ccp.c (insert_clobber_before_stack_restore): Remove
assertion.
(insert_clobbers_for_var): Fix a typo in function comment.

* gcc.dg/pr90898.c: New test.

From-SVN: r278481

re PR middle-end/91195 (incorrect may be used uninitialized smw (272711, 273474])

PR middle-end/91195
* tree-ssa-phiopt.c (cond_store_replacement): Move lhs unsharing
earlier.  Set TREE_NO_WARNING on the rhs1 of the artificially added
load.

* gcc.dg/pr91195.c: New test.

From-SVN: r278479

Make 0-series device specs work with older versions of avr-gcc.

PR target/92545
* config/avr/specs.h (LINK_SPEC) <%(link_pm_base_address)>: Remove.
* config/avr/gen-avr-mmcu-specs.c (print_mcu)
<*link_pm_base_address>: Don't write spec.
<*link_arch>: Add --defsym=__RODATA_PM_OFFSET__= as needed.

From-SVN: r278478

re PR c/92088 (aggregates with VLAs and nested functions are broken)

2019-11-20  Richard Biener  <rguenther@suse.de>

PR c/92088
c/
* c-decl.c (grokdeclarator): Prevent inlining of nested
function with VLA arguments.

* builtins.c (compute_objsize): Deal with VLAs.

* gcc.dg/torture/pr92088-1.c: New testcase.
* gcc.dg/torture/pr92088-2.c: Likewise.

From-SVN: r278477

cvt.c (ocp_convert): Use additional warning sentinel.

/cp
2019-11-20  Paolo Carlini  <paolo.carlini@oracle.com>

* cvt.c (ocp_convert): Use additional warning sentinel.

/testsuite
2019-11-20  Paolo Carlini  <paolo.carlini@oracle.com>

* g++.dg/warn/multiple-sign-compare-warn-1.C: New.

From-SVN: r278475

Daily bump.

From-SVN: r278474

Add more pedwarns for [[]] C attributes on types.

The standard [[]] attributes currently defined in C2x are all not
valid on types not being defined at the time.

Use on such types results in a warning from attribs.c about attributes
appertaining to types (the warning that I think is bogus in general
for both C and C++, applying as it does to all [[]] attributes
including gnu:: ones that are perfectly meaningful on types not being
defined and work fine when __attribute__ syntax is used instead).  If
that warning is removed (as I intend to do in a subsequent patch),
warnings may or may not result from the attribute handlers, depending
on whether those particular attribute handlers consider the attributes
meaningful in such a context.  In C, however, the rules about where
each [[]] attribute is valid are constraints, so a pedwarn, not a
warning, is required.

Because some handlers are shared between standard and gnu::
attributes, there can be cases that are valid for the GNU attribute
variant but not for the standard one.  So in general it is not correct
to rely on the attribute handlers to give all required pedwarns
(although in some cases, a pedwarn in the attribute handler is in
appropriate way of diagnosing an invalid use); they not have the
information about whether the attribute was a gnu:: one and can
legitimately accept a wider range of uses for the gnu:: attributes.

This patch ensures appropriate diagnostics for invalid uses of C2x
standard attributes on types, and so helps pave the way for the
subsequent removal of the bogus check in attribs.c, by adding a check
run in the front end before calling decl_attributes; this check
removes the attributes from the list after calling pedwarn to avoid
subsequent duplicate warnings.

Bootstrapped with no regressions for x86_64-pc-linux-gnu.

gcc/c:
* c-decl.c (c_warn_type_attributes): New function.
(groktypename, grokdeclarator, finish_declspecs): Call
c_warn_type_attributes before applying attributes to types.
* c-tree.h (c_warn_type_attributes): Declare.

gcc/testsuite:
* gcc.dg/c2x-attr-deprecated-2.c, gcc.dg/c2x-attr-fallthrough-2.c,
gcc.dg/c2x-attr-maybe_unused-2.c: Expect errors for invalid uses
of standard attributes on types.  Add more tests of invalid uses
on types.

From-SVN: r278471

libgo: better cmd/cgo handling for '.' in pkgpath

    Updates cgo's gccgoPkgpathToSymbolNew() to bring it into
    conformance with the way that gccgo now handles package
    paths with embedded dots (see CL 200838). See also
    https://gcc.gnu.org/PR61880, a related bug. This CL is a
    copy of CL 207957 in the main Go repo.

    Updates golang/go#35623.

    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/207977

From-SVN: r278470

re PR c++/92414 (internal compiler error: tree check: expected constructor, have error_mark in cxx_eval_store_expression, at cp/constexpr.c:4009)

PR c++/92414
* constexpr.c (cxx_eval_outermost_constant_expr): If DECL_INITIAL
on object is erroneous, return t without trying to evaluate
a constexpr dtor.

* g++.dg/cpp2a/constexpr-dtor4.C: New test.

From-SVN: r278468

Consider parm types equivalence for operator rewrite tiebreaker.

The C++ committee continues to discuss how best to avoid breaking existing
code with the new rules for reversed operators.  A recent suggestion was to
base the tie-breaker on the parameter types of the candidates, which made a
lot of sense to me, so this patch implements that.

This patch also mentions that a candidate was reversed or rewritten when
printing the list of candidates, and warns about a comparison that becomes
recursive under the new rules.  There is no flag for this warning; people
can silence it by swapping the operands.

* call.c (same_fn_or_template): Change to cand_parms_match.
(joust): Adjust.
(print_z_candidate): Mark rewritten/reversed candidates.
(build_new_op_1): Warn about recursive call with reversed arguments.

From-SVN: r278465

rs6000.c (move_to_end_of_ready): New, factored out from common code.

* config/rs6000/rs6000.c (move_to_end_of_ready): New, factored out
from common code.
(power6_sched_reorder2): Factored out from rs6000_sched_reorder2,
call new function.
(power9_sched_reorder2): Call new function.
(rs6000_sched_reorder2): Likewise.

From-SVN: r278463

Move ChangeLog entry to correct file

From-SVN: r278461

Remove unused parameter PROB in ipa-fnsummary.c

        * ipa-fnsummary.c (estimate_edge_size_and_time): Drop parameter PROB.
(estimate_calls_size_and_time): Update.

From-SVN: r278460

Avoid redundant computations in edge_badness.

        * ipa-inline.c (inlining_speedup): New function.
(edge_badness): Use it.

From-SVN: r278459

[MIPS] Prevent MSA branches from being put into delay slots

 This patch tightens the instruction definitions to make sure
 that MSA branch instructions cannot be put into delay slots and have their
 delay slots eligible for being filled. Also, MSA *div*3 patterns use MSA
 branches for zero checks but are not marked as being multi instruction and
 thus could be put into delay slots. This patch fixes that.

gcc/ChangeLog:

2019-11-19  Zoran Jovanovic <zoran.jovanovic@mips.com>
Dragan Mladjenovic  <dmladjenovic@wavecomp.com>

* config/mips/mips-msa.md (msa_<msabr>_<msafmt_f>, msa_<msabr>_v_<msafmt_f>):
Mark as not having "likely" version.
* config/mips/mips.md (insn_count): The simd_div instruction with
TARGET_CHECK_ZERO_DIV consists of 3 instructions.
(can_delay): Exclude simd_branch.
(defile_delay *): Add simd_branch instructions.
They have one regular delay slot.

gcc/testsuite/ChangeLog:

2019-11-19  Dragan Mladjenovic  <dmladjenovic@wavecomp.com>

* gcc.target/mips/msa-ds.c: New test.

From-SVN: r278458

Revert r278441

To restore powerpc bootstrap.

2019-11-19  Richard Sandiford  <richard.sandiford@arm.com>
gcc/
Revert:
2019-11-18  Richard Sandiford  <richard.sandiford@arm.com>

* cse.c (cse_insn): Delete no-op register moves too.
* simplify-rtx.c (comparison_to_mask): Handle unsigned comparisons.
Take a second comparison to control the value for NE.
(mask_to_comparison): Handle unsigned comparisons.
(simplify_logical_relational_operation): Likewise.  Update call
to comparison_to_mask.  Handle AND if !HONOR_NANs.
(simplify_binary_operation_1): Call the above for AND too.

gcc/testsuite/
Revert:
2019-11-18  Richard Sandiford  <richard.sandiford@arm.com>

* gcc.target/aarch64/sve/acle/asm/ptest_pmore.c: New test.

From-SVN: r278455

[AArch64] PR79262: Adjust vector cost

PR79262 has been fixed for almost all AArch64 cpus, however the example is still
vectorized in a few cases, resulting in lower performance.  Adjust the vector
cost slightly so that so that -mcpu=cortex-a53 now has identical performance as
-mcpu=cortex-a57 on libquantum.

    gcc/
PR target/79262
* config/aarch64/aarch64.c (generic_vector_cost): Adjust
vec_to_scalar_cost.

From-SVN: r278452

re PR c++/89913 (ICE with invalid using declaration)

PR c++/89913

gcc/cp/
* pt.c (get_underlying_template): Exit loop if the original type
of the alias is null.

gcc/testsuite/
* g++.dg/cpp2a/pr89913.C: New test.

From-SVN: r278451

re PR c++/92078 (error: 'struct std::ptr<Iter>' redeclared with different access)

PR c++/92078

gcc/cp/
* pt.c (maybe_new_partial_specialization): Apply access to newly
created partial specializations. Update comment style.

gcc/testsuite/
* g++.dg/cpp2a/concepts-pr92078.C: New.
  * g++.dg/cpp2a/concepts-requires18.C: Update diagnostics.

From-SVN: r278450

Suppress diagnostics substituting into a requires-expression (PR c++/92403).

gcc/cp/
* pt.c (tsubst_copy_and_build): Perform the first substitution without
diagnostics and a second only if tsubst_requries_expr returns an error.

From-SVN: r278449

Restore init_ggc_heuristics.

2019-11-19  Martin Liska  <mliska@suse.cz>

* toplev.c (general_init): Move the call...
(toplev::main): ... here as we need init_options_struct
being called.

From-SVN: r278448

[Arm] Set Armv7-A tune to Cortex-A53

By default Armv7-A tunes for Cortex-A8. This is an ancient core
today and the settings are no longer useful for newer cores. So
switch to Cortex-A53 tuning since it works well across a wide range
of modern cores.

On SPECINT2006 the performance gain is 0.7% compared to Cortex-A8 tuning,
and codesize reduces by 0.2%.

    gcc/
* config/arm/arm-cpus.in (armv7): Set tune to Cortex-A53.
(armv7-a): Likewise.
(armv7ve): Likewise.

From-SVN: r278447

Update loop-1.c test for amdgcn

2019-11-19  Andrew Stubbs  <ams@codesourcery.com>

gcc/testsuite/
* gcc.dg/tree-ssa/loop-1.c: Change amdgcn assembler scan.

From-SVN: r278446

re PR tree-optimization/92581 (condition chains vectorized wrongly)

2019-11-19  Richard Biener  <rguenther@suse.de>

PR tree-optimization/92581
* tree-vect-loop.c (vect_create_epilog_for_reduction): For
condition reduction chains gather all conditions involved
for computing the index reduction vector.

* gcc.dg/vect/vect-cond-reduc-5.c: New testcase.

From-SVN: r278445

[AArch64] Implement Armv8.5-A memory tagging (MTE) intrinsics

2019-11-19  Dennis Zhang  <dennis.zhang@arm.com>

* config/aarch64/aarch64-builtins.c (enum aarch64_builtins): Add
AARCH64_MEMTAG_BUILTIN_START, AARCH64_MEMTAG_BUILTIN_IRG,
AARCH64_MEMTAG_BUILTIN_GMI, AARCH64_MEMTAG_BUILTIN_SUBP,
AARCH64_MEMTAG_BUILTIN_INC_TAG, AARCH64_MEMTAG_BUILTIN_SET_TAG,
AARCH64_MEMTAG_BUILTIN_GET_TAG, and AARCH64_MEMTAG_BUILTIN_END.
(aarch64_init_memtag_builtins): New.
(AARCH64_INIT_MEMTAG_BUILTINS_DECL): New macro.
(aarch64_general_init_builtins): Call aarch64_init_memtag_builtins.
(aarch64_expand_builtin_memtag): New.
(aarch64_general_expand_builtin): Call aarch64_expand_builtin_memtag.
(AARCH64_BUILTIN_SUBCODE): New macro.
(aarch64_resolve_overloaded_memtag): New.
(aarch64_resolve_overloaded_builtin_general): New. Call
aarch64_resolve_overloaded_memtag to handle overloaded MTE builtins.
* config/aarch64/aarch64-c.c (aarch64_update_cpp_builtins): Define
__ARM_FEATURE_MEMORY_TAGGING when enabled.
(aarch64_resolve_overloaded_builtin): Call
aarch64_resolve_overloaded_builtin_general.
* config/aarch64/aarch64-protos.h
(aarch64_resolve_overloaded_builtin_general): New declaration.
* config/aarch64/aarch64.h (AARCH64_ISA_MEMTAG): New macro.
(TARGET_MEMTAG): Likewise.
* config/aarch64/aarch64.md (UNSPEC_GEN_TAG): New unspec.
(UNSPEC_GEN_TAG_RND, and UNSPEC_TAG_SPACE): Likewise.
(irg, gmi, subp, addg, ldg, stg): New instructions.
* config/aarch64/arm_acle.h (__arm_mte_create_random_tag): New macro.
(__arm_mte_exclude_tag, __arm_mte_ptrdiff): Likewise.
(__arm_mte_increment_tag, __arm_mte_set_tag): Likewise.
(__arm_mte_get_tag): Likewise.
* config/aarch64/predicates.md (aarch64_memtag_tag_offset): New.
(aarch64_granule16_uimm6, aarch64_granule16_simm9): New.
* config/arm/types.md (memtag): New.
* doc/invoke.texi (-memtag): Update description.

2019-11-19  Dennis Zhang  <dennis.zhang@arm.com>

* gcc.target/aarch64/acle/memtag_1.c: New test.
* gcc.target/aarch64/acle/memtag_2.c: New test.
* gcc.target/aarch64/acle/memtag_3.c: New test.

From-SVN: r278444

arm: Fixes for asm-flags vs thumb1 and ilp32

Thumb1 cannot support asm-flags currently, because we don't expose the
flags register to the compiler.  Disable the support for that case.

Adjust the asm-flag-6 test for aarch64 ilp32 correctness.

gcc/
* config/arm/arm-c.c (arm_cpu_builtins): Use def_or_undef_macro
to define __GCC_ASM_FLAG_OUTPUTS__.
* config/arm/arm.c (thumb1_md_asm_adjust): New function.
(arm_option_params_internal): Swap out targetm.md_asm_adjust
depending on TARGET_THUMB1.
* doc/extend.texi (FlagOutputOperands): Document thumb1 restriction.

gcc/testsuite/
* testsuite/gcc.target/arm/asm-flag-3.c: Skip for thumb1.
* testsuite/gcc.target/arm/asm-flag-5.c: Likewise.
* testsuite/gcc.target/arm/asm-flag-6.c: Likewise.
* testsuite/gcc.target/arm/asm-flag-4.c: New test.

* testsuite/gcc.target/aarch64/asm-flag-6.c: Use %w for
asm inputs to cmp instruction for ILP32.

From-SVN: r278443

libstdc++: Fix declarations of variable templates

This code is invalid and rejected by other compilers (see PR 92576).

* include/bits/regex.h (ranges::__detail::__enable_view_impl): Fix
declaration.
* include/bits/stl_multiset.h (ranges::__detail::__enable_view_impl):
Likewise.
* include/bits/stl_set.h (ranges::__detail::__enable_view_impl):
Likewise.
* include/bits/unordered_set.h (ranges::__detail::__enable_view_impl):
Likewise.
* include/debug/multiset.h (ranges::__detail::__enable_view_impl):
Likewise.
* include/debug/set.h (ranges::__detail::__enable_view_impl): Likewise.
* include/debug/unordered_set (ranges::__detail::__enable_view_impl):
Likewise.

From-SVN: r278440

re PR target/92549 (Use x86 xchg instruction more)

PR target/92549
* config/i386/i386.md (peephole2 for *swap<mode>): New peephole2.

* gcc.target/i386/pr92549.c: New test.

From-SVN: r278439

re PR middle-end/91450 (__builtin_mul_overflow(A,B,R) wrong code if product < 0, *R is unsigned, and !(A&B))

PR middle-end/91450
* internal-fn.c (expand_mul_overflow): For s1 * s2 -> ur, if one
operand is negative and one non-negative, compare the non-negative
one against 0 rather than comparing s1 & s2 against 0.  Otherwise,
don't compare (s1 & s2) == 0, but compare separately both s1 == 0
and s2 == 0, unless one of them is known to be negative.  Remove
tem2 variable, use tem where tem2 has been used before.

* gcc.c-torture/execute/pr91450-1.c: New test.
* gcc.c-torture/execute/pr91450-2.c: New test.

From-SVN: r278437

* doc/invoke.texi (-gno-internal-reset-location-views): Fix typo.

From-SVN: r278434

re PR c++/92504 (ICE on gcc-9 -fopenmp: internal compiler error: tree check: expected tree that contains 'decl common' structure, have 'baselink' in get_inner_reference, at expr.c:7238)

PR c++/92504
* semantics.c (handle_omp_for_class_iterator): Don't call
cp_fully_fold on cond.

* g++.dg/gomp/pr92504.C: New test.

From-SVN: r278433

re PR tree-optimization/92557 (ICE in omp_clause_aligned_alignment, at omp-low.c:4090)

PR tree-optimization/92557
* omp-low.c (omp_clause_aligned_alignment): Punt if TYPE_MODE is not
vmode rather than asserting it always is.

* gcc.dg/gomp/pr92557.c: New test.

From-SVN: r278432

re PR tree-optimization/92554 (ICE in vect_create_epilog_for_reduction, at tree-vect-loop.c:4325)

2019-11-19  Richard Biener  <rguenther@suse.de>

PR tree-optimization/92554
* tree-vect-loop.c (vect_create_epilog_for_reduction): Look
for the actual condition stmt and deal with sign-changes.

* gcc.dg/vect/pr92554.c: New testcase.

From-SVN: r278431

re PR tree-optimization/92555 (ICE in exact_div, at poly-int.h:2162)

2019-09-19  Richard Biener  <rguenther@suse.de>

PR tree-optimization/92555
* tree-vect-loop.c (vect_update_vf_for_slp): Also scan PHIs
for non-SLP stmts.

* gcc.dg/vect/pr92555.c: New testcase.

From-SVN: r278430

Initialize a variable due to -Wmaybe-uninitialized.

2019-11-19  Martin Liska  <mliska@suse.cz>

PR bootstrap/92540
* config/riscv/riscv.c (riscv_address_insns): Initialize
addr in order to remove boostrap -Wmaybe-uninitialized
error.

From-SVN: r278429

Change some bad uses of C2x attributes into pedwarns.

Certain bad uses of C2x standard attributes (that is, attributes
inside [[]] with only a name but no namespace specified) are
constraint violations, and so should be diagnosed with a pedwarn (or
error) where GCC currently uses a warning.  This patch implements this
in some cases (not yet for attributes used on types, nor for some bad
uses of fallthrough attributes).  Specifically, this applies to
unknown standard attributes (taking care not to pedwarn for nodiscard,
which is known but not implemented for C), and to all currently
implemented standard attributes in attribute declarations (including
when mixed with fallthrough) and on statements.

Bootstrapped with no regressions on x86_64-pc-linux-gnu.

gcc/c:
* c-decl.c (c_warn_unused_attributes): Use pedwarn not warning for
standard attributes.
* c-parser.c (c_parser_std_attribute): Take argument for_tm.  Use
pedwarn for unknown standard attributes and return error_mark_node
for them.

gcc/c-family:
* c-common.c (attribute_fallthrough_p): In C, use pedwarn not
warning for standard attributes mixed with fallthrough attributes.

gcc/testsuite:
* gcc.dg/c2x-attr-fallthrough-5.c, gcc.dg/c2x-attr-syntax-5.c: New
tests.
* gcc.dg/c2x-attr-deprecated-2.c, gcc.dg/c2x-attr-deprecated-4.c,
gcc.dg/c2x-attr-fallthrough-2.c, gcc.dg/c2x-attr-maybe_unused-2.c,
gcc.dg/c2x-attr-maybe_unused-4.c: Expect errors in place of some
warnings.

From-SVN: r278428

Daily bump.

From-SVN: r278427

typeck.c (cp_build_addr_expr_1): Use cp_expr_loc_or_input_loc in three places.

/cp
2019-11-18  Paolo Carlini  <paolo.carlini@oracle.com>

* typeck.c (cp_build_addr_expr_1): Use cp_expr_loc_or_input_loc
in three places.
(cxx_sizeof_expr): Use it in one additional place.
(cxx_alignof_expr): Likewise.
(lvalue_or_else): Likewise.

/testsuite
2019-11-18  Paolo Carlini  <paolo.carlini@oracle.com>

* g++.dg/cpp0x/addressof2.C: Test locations too.
* g++.dg/cpp0x/rv-lvalue-req.C: Likewise.
* g++.dg/expr/crash2.C: Likewise.
* g++.dg/expr/lval1.C: Likewise.
* g++.dg/expr/unary2.C: Likewise.
* g++.dg/ext/lvaddr.C: Likewise.
* g++.dg/ext/lvalue1.C: Likewise.
* g++.dg/tree-ssa/pr20280.C: Likewise.
* g++.dg/warn/Wplacement-new-size.C: Likewise.
* g++.old-deja/g++.brendan/alignof.C: Likewise.
* g++.old-deja/g++.brendan/sizeof2.C: Likewise.
* g++.old-deja/g++.law/temps1.C: Likewise.

From-SVN: r278424

PR middle-end/92493 - ICE in get_origin_and_offset at gimple-ssa-sprintf.c

gcc/ChangeLog:

PR tree-optimization/92493
* gimple-ssa-sprintf.c (get_origin_and_offset): Remove spurious
assignment.

gcc/testsuite/ChangeLog:

PR tree-optimization/92493
* gcc.dg/pr92493.c: New test.

From-SVN: r278423

Refactor tree-loop-distribution.c for thread safety

This patch refactors tree-loop-distribution.c for thread safety without
use of C11 __thread feature. All global variables were moved to
`class loop_distribution` which is initialized at ::execute time.

From-SVN: r278421

re PR ipa/92508 (ICE in do_estimate_edge_time, at ipa-inline-analysis.c:223 since r278159)

PR ipa/92508
* ipa-inline.c (inline_small_functions): Add new edges after reseting
caches.
* ipa-inline-analysis.c (do_estimate_edge_time): Fix sanity check.

From-SVN: r278419

Add more C2x attributes tests.

This patch adds more tests of C2x attributes, where I found cases that
were handled correctly by my patches but missing from the original
tests.  Tests are added for -std=c11 -pedantic handling of C2x
attribute syntax and corresponding -Wc11-c2x-compat handling; for
struct [[deprecated]]; and for the [[__fallthrough__]] spelling of
[[fallthrough]] in the case of valid fallthrough attributes.

Tested for x86_64-pc-linux-gnu.

* gcc.dg/c11-attr-syntax-1.c, gcc.dg/c11-attr-syntax-2.c,
gcc.dg/c11-attr-syntax-3.c, gcc.dg/c2x-attr-syntax-4.c: New tests.
* gcc.dg/c2x-attr-deprecated-1.c: Also test struct [[deprecated]].
* gcc.dg/c2x-attr-fallthrough-1.c: Also test [[__fallthrough__]].

From-SVN: r278418

PR c++/91962 - ICE with reference binding and qualification conversion.

When fixing c++/91889 (r276251) I was assuming that we couldn't have a ck_qual
under a ck_ref_bind, and I was introducing it in the patch and so this
+   if (next_conversion (convs)->kind == ck_qual)
+     {
+       gcc_assert (same_type_p (TREE_TYPE (expr),
+                    next_conversion (convs)->type));
+       /* Strip the cast created by the ck_qual; cp_build_addr_expr
+          below expects an lvalue.  */
+       STRIP_NOPS (expr);
+     }
in convert_like_real was supposed to handle it.  But that assumption was wrong
as this test shows; here we have "(int *)f" where f is of type long int, and
we're converting it to "const int *const &", so we have both ck_ref_bind and
ck_qual.  That means that the new STRIP_NOPS strips an expression it shouldn't
have, and that then breaks when creating a TARGET_EXPR.  So we want to limit
the stripping to the new case only.  This I do by checking need_temporary_p,
which will be 0 in the new case.  Yes, we can set need_temporary_p when
binding a reference directly, but then we won't have a qualification
conversion.  It is possible to have a bit-field, convert it to a pointer,
and then convert that pointer to a more-qualified pointer, but in that case
we're not dealing with an lvalue, so gl_kind is 0, so we won't enter this
block in reference_binding:
 1747   if ((related_p || compatible_p) && gl_kind)

* call.c (convert_like_real) <case ck_ref_bind>: Check need_temporary_p.

* g++.dg/cpp0x/ref-bind7.C: New test.

From-SVN: r278416

Add testcase for already fixed PR ipa/92528

2019-11-18  Martin Jambor  <mjambor@suse.cz>

PR ipa/92528
* g++.dg/ipa/pr92528.C: New test.

From-SVN: r278415

Add optabs for accelerating RAW and WAR alias checks

This patch adds optabs that check whether a read followed by a write
or a write followed by a read can be divided into interleaved byte
accesses without changing the dependencies between the bytes.
This is one of the uses of the SVE2 WHILERW and WHILEWR instructions.
(The instructions can also be used to limit the VF at runtime,
but that's future work.)

2019-11-18  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* doc/sourcebuild.texi (vect_check_ptrs): Document.
* optabs.def (check_raw_ptrs_optab, check_war_ptrs_optab): New optabs.
* doc/md.texi: Document them.
* internal-fn.def (IFN_CHECK_RAW_PTRS, IFN_CHECK_WAR_PTRS): New
internal functions.
* internal-fn.h (internal_check_ptrs_fn_supported_p): Declare.
* internal-fn.c (check_ptrs_direct): New macro.
(expand_check_ptrs_optab_fn): Likewise.
(direct_check_ptrs_optab_supported_p): Likewise.
(internal_check_ptrs_fn_supported_p): New fuction.
* tree-data-ref.c: Include internal-fn.h.
(create_ifn_alias_checks): New function.
(create_intersect_range_checks): Use it.
* config/aarch64/iterators.md (SVE2_WHILE_PTR): New int iterator.
(optab, cmp_op): Handle it.
(raw_war, unspec): New int attributes.
* config/aarch64/aarch64.md (UNSPEC_WHILERW, UNSPEC_WHILE_WR): New
constants.
* config/aarch64/predicates.md (aarch64_bytes_per_sve_vector_operand):
New predicate.
* config/aarch64/aarch64-sve2.md (check_<raw_war>_ptrs<mode>): New
expander.
(@aarch64_sve2_while<cmp_op><GPI:mode><PRED_ALL:mode>_ptest): New
pattern.

gcc/testsuite/
* lib/target-supports.exp (check_effective_target_vect_check_ptrs):
New procedure.
* gcc.dg/vect/vect-alias-check-14.c: Expect IFN_CHECK_WAR to be
used, if available.
* gcc.dg/vect/vect-alias-check-15.c: Likewise.
* gcc.dg/vect/vect-alias-check-16.c: Likewise IFN_CHECK_RAW.
* gcc.target/aarch64/sve2/whilerw_1.c: New test.
* gcc.target/aarch64/sve2/whilewr_1.c: Likewise.
* gcc.target/aarch64/sve2/whilewr_2.c: Likewise.

From-SVN: r278414