[ARM] Fix more -Wreturn-type fallout (gcc.target/arm/pr56184.C).

2017-11-22  Christophe Lyon  <christophe.lyon@linaro.org>

* gcc.target/arm/pr56184.C: Add -Wno-return-type to dg-options.

From-SVN: r255067

re PR c++/60336 (empty struct value is passed differently in C and C++)

PR c++/60336
PR middle-end/67239
PR target/68355
* c-decl.c (grokdeclarator): Set DECL_PADDING_P on unnamed bit-fields.

* class.c (layout_class_type): Set DECL_PADDING_P on padding.
* decl.c (cxx_init_decl_processing): Set TRANSLATION_UNIT_WARN_EMPTY_P.
(grokdeclarator): Set DECL_PADDING_P on unnamed bit-fields.

* lto.c (compare_tree_sccs_1): Compare TYPE_EMPTY_P and DECL_PADDING_P.

* calls.c (initialize_argument_information): Call
warn_parameter_passing_abi target hook.
(store_one_arg): Use 0 for empty record size.  Don't push 0 size
argument onto stack.
(must_pass_in_stack_var_size_or_pad): Return false for empty types.
* common.opt: Update -fabi-version description.
* config/i386/i386.c (init_cumulative_args): Set cum->warn_empty.
(ix86_gimplify_va_arg): Call arg_int_size_in_bytes instead of
int_size_in_bytes.
(ix86_is_empty_record): New function.
(ix86_warn_parameter_passing_abi): New function.
(TARGET_EMPTY_RECORD_P): Redefine.
(TARGET_WARN_PARAMETER_PASSING_ABI): Redefine.
* config/i386/i386.h (CUMULATIVE_ARGS): Add warn_empty.
* doc/tm.texi: Regenerated.
* doc/tm.texi.in (TARGET_EMPTY_RECORD_P,
TARGET_WARN_PARAMETER_PASSING_ABI): Add.
* dwarf2out.c (get_ultimate_context): Move to tree.c.
* explow.c (hard_function_value): Call arg_int_size_in_bytes
instead of int_size_in_bytes.
* expr.c (copy_blkmode_to_reg): Likewise.
* function.c (aggregate_value_p): Return 0 for empty types.
(assign_parm_find_entry_rtl): Call warn_parameter_passing_abi target hook.
(locate_and_pad_parm): Call arg size_in_bytes instead
size_in_bytes.
* lto-streamer-out.c (hash_tree): Hash TYPE_EMPTY_P and DECL_PADDING_P.
* stor-layout.c (finalize_type_size): Set TYPE_EMPTY_P.
* target.def (empty_record_p, warn_parameter_passing_abi): New target
hooks.
* targhooks.c (hook_void_CUMULATIVE_ARGS_tree): New hook.
(std_gimplify_va_arg_expr): Skip empty records.  Call
arg_size_in_bytes instead size_in_bytes.
* targhooks.h (hook_void_CUMULATIVE_ARGS_tree): Declare.
* tree-core.h (tree_type_common): Add empty_flag.
(tree_decl_common): Update comments.
* tree-streamer-in.c (unpack_ts_decl_common_value_fields): Stream
DECL_PADDING_P.
(unpack_ts_type_common_value_fields): Stream TYPE_EMPTY_P.
* tree-streamer-out.c (pack_ts_decl_common_value_fields): Stream
DECL_PADDING_P.
(pack_ts_type_common_value_fields): Stream TYPE_EMPTY_P.
* tree.c (default_is_empty_type): New function.
(default_is_empty_record): New function.
(arg_int_size_in_bytes): New function.
(arg_size_in_bytes): New function.
(get_ultimate_context): New function.
* tree.h: Define TYPE_EMPTY_P, DECL_PADDING_P and
TRANSLATION_UNIT_WARN_EMPTY_P.
(default_is_empty_record, arg_int_size_in_bytes,
arg_size_in_bytes, get_ultimate_context): Declare.

* g++.dg/abi/empty12.C: New test.
* g++.dg/abi/empty12.h: New test.
* g++.dg/abi/empty12a.c: New test.
* g++.dg/abi/empty13.C: New test.
* g++.dg/abi/empty13.h: New test.
* g++.dg/abi/empty13a.c: New test.
* g++.dg/abi/empty14.C: New test.
* g++.dg/abi/empty14.h: New test.
* g++.dg/abi/empty14a.c: New test.
* g++.dg/abi/empty15.C: New test.
* g++.dg/abi/empty15.h: New test.
* g++.dg/abi/empty15a.c: New test.
* g++.dg/abi/empty16.C: New test.
* g++.dg/abi/empty16.h: New test.
* g++.dg/abi/empty16a.c: New test.
* g++.dg/abi/empty17.C: New test.
* g++.dg/abi/empty17.h: New test.
* g++.dg/abi/empty17a.c: New test.
* g++.dg/abi/empty18.C: New test.
* g++.dg/abi/empty18.h: New test.
* g++.dg/abi/empty18a.c: New test.
* g++.dg/abi/empty19.C: New test.
* g++.dg/abi/empty19.h: New test.
* g++.dg/abi/empty19a.c: New test.
* g++.dg/abi/empty20.C: New test.
* g++.dg/abi/empty21.C: New test.
* g++.dg/abi/empty22.C: New test.
* g++.dg/abi/empty22.h: New test.
* g++.dg/abi/empty22a.c: New test.
* g++.dg/abi/empty23.C: New test.
* g++.dg/abi/empty24.C: New test.
* g++.dg/abi/empty25.C: New test.
* g++.dg/abi/empty25.h: New test.
* g++.dg/abi/empty25a.c: New test.
* g++.dg/abi/empty26.C: New test.
* g++.dg/abi/empty26.h: New test.
* g++.dg/abi/empty26a.c: New test.
* g++.dg/abi/empty27.C: New test.
* g++.dg/abi/empty28.C: New test.
* g++.dg/abi/pr60336-1.C: New test.
* g++.dg/abi/pr60336-10.C: New test.
* g++.dg/abi/pr60336-11.C: New test.
* g++.dg/abi/pr60336-12.C: New test.
* g++.dg/abi/pr60336-2.C: New test.
* g++.dg/abi/pr60336-3.C: New test.
* g++.dg/abi/pr60336-4.C: New test.
* g++.dg/abi/pr60336-5.C: New test.
* g++.dg/abi/pr60336-6.C: New test.
* g++.dg/abi/pr60336-7.C: New test.
* g++.dg/abi/pr60336-8.C: New test.
* g++.dg/abi/pr60336-9.C: New test.
* g++.dg/abi/pr68355.C: New test.
* g++.dg/lto/pr60336_0.C: New test.

Co-Authored-By: H.J. Lu <hongjiu.lu@intel.com>
Co-Authored-By: Jason Merrill <jason@redhat.com>
From-SVN: r255066

[ARM] Factor out CMSE register clearing code

Functions cmse_nonsecure_call_clear_caller_saved and
cmse_nonsecure_entry_clear_before_return both contain very similar code
to clear registers. What's worse, they differ slightly at times so if a
bug is found in one careful thoughts is needed to decide whether the
other function needs fixing too.

This commit addresses the situation by factoring the two pieces of code
into a new function. In doing so the code generated to clear VFP
registers in cmse_nonsecure_call now uses the same sequence as
cmse_nonsecure_entry functions. Tests expectation are thus updated
accordingly.

2017-11-22  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    gcc/
    * config/arm/arm.c (cmse_clear_registers): New function.
    (cmse_nonsecure_call_clear_caller_saved): Replace register clearing
    code by call to cmse_clear_registers.
    (cmse_nonsecure_entry_clear_before_return): Likewise.

    gcc/testsuite/
    * gcc.target/arm/cmse/mainline/hard-sp/cmse-13.c: Adapt expectations
    to vmov instructions now generated.
    * gcc.target/arm/cmse/mainline/hard-sp/cmse-7.c: Likewise.
    * gcc.target/arm/cmse/mainline/hard-sp/cmse-8.c: Likewise.
    * gcc.target/arm/cmse/mainline/hard/cmse-13.c: Likewise.
    * gcc.target/arm/cmse/mainline/hard/cmse-7.c: Likewise.
    * gcc.target/arm/cmse/mainline/hard/cmse-8.c: Likewise.

From-SVN: r255065

2017-11-22  Tamar Christina  <tamar.christina@arm.com>

* config/arm/arm_neon.h (vdot_u32, vdotq_u32)
(vdot_s32, vdotq_s32): New.
(vdot_lane_u32, vdotq_lane_u32): New.
(vdot_lane_s32, vdotq_lane_s32): New.

gcc/testsuite/
2017-11-22  Tamar Christina  <tamar.christina@arm.com>

* gcc.target/arm/simd/vdot-compile.c: New.
* gcc.target/arm/simd/vect-dot-qi.h: New.
* gcc.target/arm/simd/vect-dot-s8.c: New.
* gcc.target/arm/simd/vect-dot-u8.c: New

From-SVN: r255064

target-supports.exp (check_effective_target_bswap16): Do not skip on alpha and x86 targets.

* lib/target-supports.exp (check_effective_target_bswap16):
Do not skip on alpha and x86 targets.

From-SVN: r255063

compiler: make comparison operator() methods const

    This is required for new versions of libstdc++ in C++17 mode.

    Fixes GCC PR 83102.

    Reviewed-on: https://go-review.googlesource.com/79396

From-SVN: r255062

[ARM] Fix test armv8_2-fp16-move-1.c

2017-11-22  Sudakshina Das  <sudi.das@arm.com>

* gcc.target/arm/armv8_2-fp16-move-1.c: Add -mfloat-abi=hard option.

From-SVN: r255061

PR82547: Undetected overflow for UNSIGNED wide_ints

wi::add_large and wi::sub_large weren't setting the overflow bit
correctly for unsigned operations if the result needed fewer HWIs
than the precision.

2017-11-22  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
PR middle-end/82547
* wide-int.cc (wi::add_large, wi::sub_large): Fix overflow detection
for unsigned values with fewer HWIs than the precision.
(test_overflow): New function.
(wide_int_cc_tests): Call it.

From-SVN: r255059

PR83004: Accidental change to pr81136.c for VECTOR_BITS==128

r254589 was supposed to leave tests unchanged for the default
VECTOR_BITS==128, but I must have got my sums wrong on pr81136.c.

2017-11-22  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/testsuite/
PR testsuite/83004
* gcc.dg/vect/pr81136.c: Restore previous alignment of 32
in the default case.

From-SVN: r255058

Fix calculation of ptr_mode for MODE_PARTIAL_INT Pmode

This patch fixes a regression caused by r251469, where I'd incorrectly
converted a call to mode_for_size that sometimes needs MODE_PARTIAL_INTs.

2017-11-22  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
* emit-rtl.c (init_derived_machine_modes): Make sure ptr_mode
has the same mode class as Pmode.

From-SVN: r255057

arm.c (cmse_nonsecure_call_clear_caller_saved): Get rid of padding_bits_to_clear_ptr.

2017-11-22  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    gcc/
    * config/arm/arm.c (cmse_nonsecure_call_clear_caller_saved): Get rid of
    padding_bits_to_clear_ptr.
    (cmse_nonsecure_entry_clear_before_return): Likewise.

From-SVN: r255056

[ARM] Use bitmap to control cmse_nonsecure_call register clearing

As part of r253256, cmse_nonsecure_entry_clear_before_return has been
rewritten to use auto_sbitmap instead of an integer bitfield to control
which register needs to be cleared. This commit continues this work in
cmse_nonsecure_call_clear_caller_saved.

2017-11-22  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    gcc/
    * config/arm/arm.c (cmse_nonsecure_call_clear_caller_saved): Use
    auto_sbitap instead of integer bitfield to control register needing
    clearing.

From-SVN: r255055

re PR tree-optimization/83044 (ice in contains_struct_check)

PR tree-optimization/83044
* tree-vrp.c (vrp_prop::check_array_ref): If eltsize is not
INTEGER_CST or is 0, clear up_bound{,_p1} and later ignore tests
that need the upper bound.  Subtract offset from
get_addr_base_and_unit_offset only if positive and subtract it
before division by eltsize rather than after it.

* gcc.dg/pr83044.c: New test.
* c-c++-common/Warray-bounds.c (fb): Fix up MAX value.

From-SVN: r255054

re PR fortran/79072 (ICE with class(*) pointer function result and character value)

2017-11-22  Paul Thomas  <pault@gcc.gnu.org>

PR fortran/79072
* trans-stmt.c (trans_associate_var): Weaken the over strong
condition for using the fake result decl.

2017-11-22  Paul Thomas  <pault@gcc.gnu.org>

PR fortran/79072
* gfortran.dg/class_result_6.f90: New test for comment 10 of
the PR.

From-SVN: r255053

PR go/83102 relax std::set checks for invocable comparison object

PR go/83102
* include/bits/stl_tree.h (_Rb_tree): Relax invocable checks for
comparison object pre-C++17.

From-SVN: r255052

re PR debug/83084 (-fcompare-debug failure on ppc64le)

PR debug/83084
* valtrack.c (propagate_for_debug_subst, propagate_for_debug): Reset
debug insns if they would contain UNSPEC_VOLATILE or volatile asm.
(dead_debug_insert_temp): Likewise, but also ignore even non-volatile
asm.

* g++.dg/opt/pr83084.C: New test.

From-SVN: r255051

re PR middle-end/82875 (ICE at -Os on valid code on x86_64-linux-gnu: in find_widening_optab_handler_and_mode, at optabs-query.c:414)

PR middle-end/82875
* optabs.c (expand_doubleword_mult, expand_binop): Before calling
expand_binop with *mul_widen_optab, make sure at least one of the
operands doesn't have VOIDmode.

* gcc.dg/pr82875.c: New test.
* gcc.c-torture/compile/pr82875.c: New test.

From-SVN: r255050

re PR debug/83034 (ice in mem_loc_descriptor, at dwarf2out.c :15669)

PR debug/83034
* dwarf2out.c (mem_loc_descriptor): Handle VEC_SERIES.

* gcc.dg/pr83034.c: New test.

From-SVN: r255049

re PR rtl-optimization/82044 (runtime signed integer overflow in check_mem_read_rtx() and all_positions_needed_p() in dse.c)

PR rtl-optimization/82044
PR tree-optimization/82042
* dse.c (record_store): Check for overflow.
(check_mem_read_rtx): Properly check for overflow if width == -1, call
add_wild_read instead of clear_rhs_from_active_local_stores on
overflow and log it into dump_file.

From-SVN: r255048

gimple-iterator.c (gimple_find_edge_insert_loc): Ignore fake edges to exit when looking for a place to insert.

2017-11-22  Richard Biener  <rguenther@suse.de>

* gimple-iterator.c (gimple_find_edge_insert_loc): Ignore
fake edges to exit when looking for a place to insert.
* tree-ssa-pre.c (clear_expression_ids): Inline into callers
and remove.
(insert_into_preds_of_block): Commit edge insertion immediately,
assert that doesn't require new BBs.
(fini_pre): Release expressions.
(pass_pre::execute): Shuffle things around a bit, if the fn
is too large do not compute AVAIL either as this is really the
quadratic bit.

From-SVN: r255047

PR 83070 Fix -Wsign-compare warning

2017-11-22  Janne Blomqvist  <jb@gcc.gnu.org>

        PR libfortran/83070
        * intrinsics/eoshift0.c (eoshift0): Fix -Wsign-compare warning by
        making a_ex and r_ex index_type instead of size_t.

From-SVN: r255045

re PR tree-optimization/83089 (ICE: Segmentation fault (in instantiate_scev_name))

2017-11-22  Richard Biener  <rguenther@suse.de>

PR tree-optimization/83089
* tree-if-conv.c (pass_if_conversion::execute): If anything
changed reset SCEV and free the number of iteration estimates.

* gcc.dg/pr83089.c: New testcase.

From-SVN: r255044

libgo: don't use grep -q in mksigtab.sh

    Solaris grep does not support the -q option.

    Reviewed-on: https://go-review.googlesource.com/79239

From-SVN: r255042

Daily bump.

From-SVN: r255041

C: don't suggest names that came from earlier failures (PR c/83056)

PR c/83056 reports an issue affecting trunk and gcc-7 in which
the C frontend's implementation of lookup_name_fuzzy uses undeclared
identifiers as suggestions when encountering subsequent undeclared
identifiers.

The fix is to filter out the names bound to error_mark_node
in lookup_name_fuzzy.

The C++ frontend is unaffected, as it already does this.

gcc/c/ChangeLog:
PR c/83056
* c-decl.c (lookup_name_fuzzy): Don't suggest names that came from
earlier failed lookups.

gcc/testsuite/ChangeLog:
PR c/83056
* gcc.dg/spellcheck-pr83056.c: New test case.

From-SVN: r255038

re PR tree-optimization/82945 (add warning for passing non-strings to functions that expect string arguments)

gcc/ChangeLog:

PR tree-optimization/82945
* calls.h (warn_nonstring_bound): Remove unused function.

From-SVN: r255036

PR libstdc++/48101 improve errors for invalid container specializations

PR libstdc++/48101
* include/bits/allocator.h (allocator<const _Tp>)
(allocator<volatile _Tp>, allocator<const volatile _Tp>): Add partial
specializations.
* include/bits/forward_list.h (forward_list): Add static assertions.
* include/bits/hashtable.h (__cache_default): Use
__is_nothrow_invocable instead of __is_noexcept_hash.
(_Hashtable): Add static assertions.
* include/bits/hashtable_policy.h (__is_noexcept_hash): Remove.
* include/bits/stl_deque.h (deque): Add static assertions.
* include/bits/stl_function.h (_Identity<const _Tp>): Add partial
specialization.
* include/bits/stl_list.h (list): Add static assertions.
* include/bits/stl_map.h (map): Likewise.
* include/bits/stl_multimap.h (multimap): Likewise.
* include/bits/stl_multiset.h (multiset): Likewise.
* include/bits/stl_set.h (set): Likewise.
* include/bits/stl_tree.h (_Rb_tree): Likewise.
* include/bits/stl_vector.h (vector): Likewise.
* include/bits/unordered_map.h (unordered_map, unordered_multimap):
Use typename instead of class in template-parameter-list and remove
spaces.
* include/bits/unordered_set.h (unordered_set, unordered_multiset):
Likewise.
* testsuite/23_containers/deque/48101-2_neg.cc: New test.
* testsuite/23_containers/deque/48101_neg.cc: New test.
* testsuite/23_containers/forward_list/48101-2_neg.cc: New test.
* testsuite/23_containers/forward_list/48101_neg.cc: New test.
* testsuite/23_containers/list/48101-2_neg.cc: New test.
* testsuite/23_containers/list/48101_neg.cc: New test.
* testsuite/23_containers/map/48101-2_neg.cc: New test.
* testsuite/23_containers/map/48101_neg.cc: New test.
* testsuite/23_containers/map/operations/31440.cc: Fix comparison
object to have const-qualified call operator.
* testsuite/23_containers/multimap/48101-2_neg.cc: New test.
* testsuite/23_containers/multimap/48101_neg.cc: New test.
* testsuite/23_containers/multiset/48101-2_neg.cc: New test.
* testsuite/23_containers/multiset/48101_neg.cc: New test.
* testsuite/23_containers/set/48101-2_neg.cc: New test.
* testsuite/23_containers/set/48101_neg.cc: New test.
* testsuite/23_containers/unordered_map/48101-2_neg.cc: New test.
* testsuite/23_containers/unordered_map/48101_neg.cc: New test.
* testsuite/23_containers/unordered_multimap/48101-2_neg.cc: New test.
* testsuite/23_containers/unordered_multimap/48101_neg.cc: New test.
* testsuite/23_containers/unordered_multiset/48101-2_neg.cc: New test.
* testsuite/23_containers/unordered_multiset/48101_neg.cc: New test.
* testsuite/23_containers/unordered_set/48101-2_neg.cc: New test.
* testsuite/23_containers/unordered_set/48101_neg.cc: New test.
* testsuite/23_containers/unordered_set/instantiation_neg.cc: Adjust
dg-error line number.
* testsuite/23_containers/vector/48101-2_neg.cc: New test.
* testsuite/23_containers/vector/48101_neg.cc: New test.

From-SVN: r255035

PR tree-optimization/82945 - add warning for passing non-strings to functions that expect string arguments

gcc/ChangeLog:

PR tree-optimization/82945
* builtins.c (expand_builtin_strlen): Call maybe_warn_nonstring_arg.
* calls.h (maybe_warn_nonstring_arg): Declare new function.
* calls.c (get_attr_nonstring_decl, maybe_warn_nonstring_arg): New
functions.
(initialize_argument_information): Call maybe_warn_nonstring_arg.
* calls.h (get_attr_nonstring_decl): Declare new function.
* doc/extend.texi (attribute nonstring): Update.
* gimple-fold.c (gimple_fold_builtin_strncpy): Call
get_attr_nonstring_decl and handle it.
* tree-ssa-strlen.c (maybe_diag_stxncpy_trunc): Same.  Improve
detection of nul-termination.
(strlen_to_stridx): Change to a pointer.
(handle_builtin_strlen, handle_builtin_stxncpy): Adjust.
(pass_strlen::execute): Same.

gcc/testsuite/ChangeLog:

PR tree-optimization/82945
* c-c++-common/Wstringop-truncation-2.c: New test.
* c-c++-common/Wstringop-truncation.c: Adjust.
* c-c++-common/attr-nonstring-2.c: Adjust.
* c-c++-common/attr-nonstring-3.c: New test.

From-SVN: r255031

i386-opts.h (enum prefer_vector_width): Added new enum for the new option -mprefer-vector-width=[none|128|256|512].

* config/i386/i386-opts.h (enum prefer_vector_width): Added new enum
for the new option -mprefer-vector-width=[none|128|256|512].
* config/i386/i386.c (ix86_target_string): remove old style options
-mprefer-avx256 and make -mprefer-avx128 as alias.
(ix86_option_override_internal):  Apply defaults for the
-mprefer-vector-width=[128|256] option.
* config/i386/i386.h (TARGET_PREFER_AVX128, TARGET_PREFER_AVX256):
Implement macros to work with -mprefer-vector-width=.
* config/i386/i386.opt: Implemented option
-mprefer-vector-width=[none|128|256|512].
* doc/invoke.texi: Documentation for
-mprefer-vector-width=[none|128|256|512].

gcc/testsuite/

* g++.dg/ext/pr57362.C (__attribute__): Test
prefer-vector-width=[128|256] target attribute.
* gcc.target/i386/avx512f-constant-float-return.c (dg-optioins):
Use -mprefer-vector-width=256 instead of -mprefer-avx256.
* gcc.target/i386/avx512f-prefer.c: Ditto.
* gcc.target/i386/pr82460-2.c: Ditto.

From-SVN: r255030

Add quotes for constexpr keyword.

2017-11-21  Martin Liska  <mliska@suse.cz>

* class.c (finalize_literal_type_property): Add quotes for
constexpr keyword.
(explain_non_literal_class): Likewise.
* constexpr.c (ensure_literal_type_for_constexpr_object): Likewise.
(is_valid_constexpr_fn): Likewise.
(check_constexpr_ctor_body): Likewise.
(register_constexpr_fundef): Likewise.
(explain_invalid_constexpr_fn): Likewise.
(cxx_eval_builtin_function_call): Likewise.
(cxx_eval_call_expression): Likewise.
(cxx_eval_loop_expr): Likewise.
(potential_constant_expression_1): Likewise.
* decl.c (check_previous_goto_1): Likewise.
(check_goto): Likewise.
(grokfndecl): Likewise.
(grokdeclarator): Likewise.
* error.c (maybe_print_constexpr_context): Likewise.
* method.c (process_subob_fn): Likewise.
(defaulted_late_check): Likewise.
* parser.c (cp_parser_compound_statement): Likewise.
2017-11-21  Martin Liska  <mliska@suse.cz>

* g++.dg/cpp0x/constexpr-48089.C: Add quotes for constexpr
keyword; add dg-message for 'in .constexpr. expansion of '.
* g++.dg/cpp0x/constexpr-50060.C: Likewise.
* g++.dg/cpp0x/constexpr-60049.C: Likewise.
* g++.dg/cpp0x/constexpr-70323.C: Likewise.
* g++.dg/cpp0x/constexpr-70323a.C: Likewise.
* g++.dg/cpp0x/constexpr-cast.C: Likewise.
* g++.dg/cpp0x/constexpr-diag3.C: Likewise.
* g++.dg/cpp0x/constexpr-ex1.C: Likewise.
* g++.dg/cpp0x/constexpr-generated1.C: Likewise.
* g++.dg/cpp0x/constexpr-ice16.C: Likewise.
* g++.dg/cpp0x/constexpr-ice5.C: Likewise.
* g++.dg/cpp0x/constexpr-incomplete2.C: Likewise.
* g++.dg/cpp0x/constexpr-neg1.C: Likewise.
* g++.dg/cpp0x/constexpr-recursion.C: Likewise.
* g++.dg/cpp0x/constexpr-shift1.C: Likewise.
* g++.dg/cpp1y/constexpr-70265-1.C: Likewise.
* g++.dg/cpp1y/constexpr-70265-2.C: Likewise.
* g++.dg/cpp1y/constexpr-79655.C: Likewise.
* g++.dg/cpp1y/constexpr-new.C: Likewise.
* g++.dg/cpp1y/constexpr-return2.C: Likewise.
* g++.dg/cpp1y/constexpr-shift1.C: Likewise.
* g++.dg/cpp1y/constexpr-throw.C: Likewise.
* g++.dg/cpp1z/constexpr-lambda6.C: Likewise.
* g++.dg/ext/constexpr-vla1.C: Likewise.
* g++.dg/ext/constexpr-vla2.C: Likewise.
* g++.dg/ext/constexpr-vla3.C: Likewise.
* g++.dg/cpp0x/static_assert10.C: Likewise.
* g++.dg/cpp1y/pr63996.C: Likewise.
* g++.dg/cpp1y/pr68180.C: Likewise.
* g++.dg/cpp1y/pr77830.C: Likewise.
* g++.dg/ubsan/pr63956.C: Likewise.

From-SVN: r255025

ppc-asm.h (f50, vs50): Fix values.

* config/rs6000/ppc-asm.h (f50, vs50): Fix values.

From-SVN: r255024

Fix invalid XML in libstdc++ manual

2017-11-21  Przemyslaw Wirkus  <przemyslaw.wirkus@arm.com>

* doc/xml/manual/using.xml (manual.intro.using.macros): Move
variablelist element at the end of its list.

From-SVN: r255023

Improve -Wmaybe-uninitialized documentation

* doc/invoke.texi (-Wmaybe-uninitialized): Rephrase for clarity.

From-SVN: r255022

New POINTER_DIFF_EXPR

2017-11-21  Marc Glisse  <marc.glisse@inria.fr>

gcc/c/
* c-fold.c (c_fully_fold_internal): Handle POINTER_DIFF_EXPR.
* c-typeck.c (pointer_diff): Use POINTER_DIFF_EXPR.

gcc/c-family/
* c-pretty-print.c (pp_c_additive_expression,
c_pretty_printer::expression): Handle POINTER_DIFF_EXPR.

gcc/cp/
* constexpr.c (cxx_eval_constant_expression,
potential_constant_expression_1): Handle POINTER_DIFF_EXPR.
* cp-gimplify.c (cp_fold): Likewise.
* error.c (dump_expr): Likewise.
* typeck.c (pointer_diff): Use POINTER_DIFF_EXPR.

gcc/
* doc/generic.texi: Document POINTER_DIFF_EXPR, update
POINTER_PLUS_EXPR.
* cfgexpand.c (expand_debug_expr): Handle POINTER_DIFF_EXPR.
* expr.c (expand_expr_real_2): Likewise.
* fold-const.c (const_binop, fold_addr_of_array_ref_difference,
fold_binary_loc): Likewise.
* match.pd (X-X, P+(Q-P), &D-P, (P+N)-P, P-(P+N), (P+M)-(P+N),
P-Q==0, -(A-B), X-Z<Y-Z, (X-Z)-(Y-Z), Z-X<Z-Y, (Z-X)-(Z-Y),
(A-B)+(C-A)): New transformations for POINTER_DIFF_EXPR, based on
MINUS_EXPR transformations.
* optabs-tree.c (optab_for_tree_code): Handle POINTER_DIFF_EXPR.
* tree-cfg.c (verify_expr, verify_gimple_assign_binary): Likewise.
* tree-inline.c (estimate_operator_cost): Likewise.
* tree-pretty-print.c (dump_generic_node, op_code_prio,
op_symbol_code): Likewise.
* tree-vect-stmts.c (vectorizable_operation): Likewise.
* vr-values.c (extract_range_from_binary_expr): Likewise.
* varasm.c (initializer_constant_valid_p_1): Likewise.
* tree.def: New tree code POINTER_DIFF_EXPR.

From-SVN: r255021

* config/i386/i386.md: Missing file from my previous commit.

From-SVN: r255019

re PR c++/83045 (-Wreturn-type regression in C++)

PR c++/83045
* tree-cfg.c (pass_warn_function_return::execute): Formatting fix.
Also warn if seen __builtin_unreachable () call with BUILTINS_LOCATION.
Use LOCATION_LOCUS when comparing against UNKNOWN_LOCATION.

* c-c++-common/pr61405.c (fn0, fn1): Add return stmts.
* c-c++-common/Wlogical-op-2.c (fn): Likewise.
* g++.dg/debug/pr53466.C: Add -Wno-return-type to dg-options.
* g++.dg/opt/combine.C: Likewise.
* g++.dg/ubsan/return-3.C: Likewise.
* g++.dg/pr59445.C: Likewise.
* g++.dg/pr49847.C: Likewise.
* g++.dg/ipa/pr61800.C: Likewise.
* g++.dg/ipa/pr63470.C: Likewise.
* g++.dg/ipa/pr68672-1.C: Likewise.
* g++.dg/pr58438.C: Likewise.
* g++.dg/torture/pr59265.C: Likewise.
* g++.dg/tree-ssa/ssa-dse-2.C: Likewise.
* g++.old-deja/g++.eh/catch13.C: Likewise.
* g++.old-deja/g++.eh/crash1.C: Likewise.
* g++.dg/tm/pr60004.C: Expect -Wreturn-type warning.
* g++.dg/torture/pr55740.C: Likewise.
* g++.dg/torture/pr43257.C: Likewise.
* g++.dg/torture/pr64280.C: Likewise.
* g++.dg/torture/pr54684.C: Likewise.
* g++.dg/torture/pr56694.C: Likewise.
* g++.dg/torture/pr68470.C: Likewise.
* g++.dg/torture/pr60648.C: Likewise.
* g++.dg/torture/pr71281.C: Likewise.
* g++.dg/torture/pr52772.C: Add -Wno-return-type dg-additional-options.
* g++.dg/torture/pr64669.C: Likewise.
* g++.dg/torture/pr58369.C: Likewise.
* g++.dg/torture/pr33627.C: Likewise.
* g++.dg/torture/predcom-1.C: Add
#pragma GCC diagnostic ignored "-Wreturn-type".
* g++.dg/lto/20090221_0.C: Likewise.
* g++.dg/lto/20091026-1_1.C: Likewise.
* g++.dg/lto/pr54625-1_1.C: Likewise.
* g++.dg/warn/pr83045.C: New test.

From-SVN: r255018

i386.md (*bswap<mode>2_movbe): Add integer suffix to movbe mnemonic.

* config/i386/i386.md (*bswap<mode>2_movbe): Add
integer suffix to movbe mnemonic.
(*bswaphi2_movbe): Ditto.
(bswaphi_lowpart): Merge with *bswaphi_lowpart_1.

testsuite/ChangeLog:

* gcc.target/i386/movbe-1.c: Update scan string for movbe
with integer suffix.
* gcc.target/i386/movbe-2.c: Ditto.
* gcc.target/i386/movbe-3.c: Ditto.
* gcc.target/i386/movbe-4.c: Ditto.
* gcc.target/i386/movbe-5.c: Ditto.

From-SVN: r255017

* gcc.target/i386/pr82713.c: Fix dg directive.

From-SVN: r255016

re PR c++/83020 (('17) Class template constructor call skipped with no error when substitution fails in default argument)

2017-11-21  Paolo Carlini  <paolo.carlini@oracle.com>

PR c++/83020
* g++.dg/cpp1z/pr83020.C: New.

From-SVN: r255006

Remove not needed xstrdup_for_dump.

2017-11-21  Martin Liska  <mliska@suse.cz>

* tree-inline.c (expand_call_inline):
  Remove not needed xstrdup_for_dump.

From-SVN: r255005

re PR target/82880 (gcc --help=target --help=optimizers hangs on mips)

PR target/82880
* config/mips/frame-header-opt.c (mips_register_frame_header_opt):
Remove static keyword from f variable.

* gcc.dg/opts-8.c: New test.

From-SVN: r255004

* c-common.c (get_nonnull_operand): Use tree_to_uhwi.

From-SVN: r255003

re PR tree-optimization/83086 (valgrind error in gimple-ssa-store-merging.c for recent build)

PR tree-optimization/83086
* gimple-ssa-store-merging.c
(imm_store_chain_info::try_coalesce_bswap): Test this_n.base_addr
rather than n.base_addr.

From-SVN: r255002

Fix UBSAN errors in dse.c (PR rtl-optimization/82044).

2017-11-21  Martin Liska  <mliska@suse.cz>

PR rtl-optimization/82044
PR tree-optimization/82042
* dse.c (check_mem_read_rtx): Check for overflow.

From-SVN: r255001

tree-ssa-threadbackward.c (find_jump_threads_backwards): Fix typo in comment.

* tree-ssa-threadbackward.c (find_jump_threads_backwards): Fix
typo in comment.

From-SVN: r254999

Don't split call from its call arg location.

gcc/
2017-11-21  Claudiu Zissulescu  <claziss@synopsys.com>

* cfgrtl.c (force_nonfallthru_and_redirect): Don't split a call
and its corresponding call arg location note.

testsuite/
2017-11-21  Claudiu Zissulescu  <claziss@synopsys.com>

* gcc.target/arc/loop-5.cpp: New test.

From-SVN: r254998

[ARC] Reimplement exception handling support.

2016-06-09  Claudiu Zissulescu  <claziss@synopsys.com>
    Andrew Burgess  <andrew.burgess@embecosm.com>

* config/arc/arc-protos.h (arc_compute_frame_size): Delete
declaration.
(arc_return_slot_offset): Likewise.
(arc_eh_return_address_location): New declaration.
* config/arc/arc.c (TARGET_BUILTIN_SETJMP_FRAME_VALUE): Define.
(MUST_SAVE_REGISTER): Add exception handler case.
(MUST_SAVE_RETURN_ADDR): Likewise.
(arc_frame_pointer_required): Likewise.
(arc_frame_pointer_needed): New function.
(arc_compute_frame_size): Changed.
(arc_expand_prologue): Likewise.
(arc_expand_epilogue): Likewise.
(arc_initial_elimination_offset): Likewise.
(arc_return_slot_offset): Delete.
(arc_eh_return_address_location): New function.
(arc_builtin_setjmp_frame_value): Likewise.
* config/arc/arc.h (EH_RETURN_DATA_REGNO): Use 2 registers.
(EH_RETURN_STACKADJ_RTX): Define.
(EH_RETURN_HANDLER_RTX): Likewise.
* config/arc/arc.md (eh_return): Delete.

Co-Authored-By: Andrew Burgess <andrew.burgess@embecosm.com>
From-SVN: r254997

print-tree.h (debug_vec_tree): Remove prototype.

* print-tree.h (debug_vec_tree): Remove prototype.
* gdbinit.in (pvt): Remove macro.

From-SVN: r254996

re PR tree-optimization/83047 (glibc/crypt/crypt_util.c gets miscompiled)

PR tree-optimization/83047
* gimple-ssa-store-merging.c
(imm_store_chain_info::output_merged_store): If the loads with the
same vuse are in different basic blocks, for load_gsi pick a load
location that is dominated by the other loads.

* gcc.dg/pr83047.c: New test.

From-SVN: r254992

P0428R2 - familiar template syntax for generic lambdas

P0428R2 - familiar template syntax for generic lambdas
* parser.c (cp_parser_lambda_declarator_opt): Don't pedwarn
for cxx2a and above, reword pedwarn for C++14/C++17.

* g++.dg/cpp1y/lambda-generic-x.C: Adjust warnings and limit
to c++17_down target.
* g++.dg/cpp1y/lambda-generic-dep.C: Likewise.
* g++.dg/cpp1y/lambda-generic-77914.C: Adjust error and limit
to c++17_down target.
* g++.dg/cpp2a/lambda-generic1.C: New test.
* g++.dg/cpp2a/lambda-generic2.C: New test.
* g++.dg/cpp2a/lambda-generic3.C: New test.
* g++.dg/cpp2a/lambda-generic4.C: New test.
* g++.dg/cpp2a/lambda-generic5.C: New test.

From-SVN: r254991

re PR c++/83059 (ICE on invalid C++ code: in tree_to_uhwi, at tree.c:6633)

PR c++/83059
* c-common.c (get_atomic_generic_size): Use TREE_INT_CST_LOW
instead of tree_to_uhwi, formatting fix.
* config/i386/i386.c (ix86_memmodel_check): Start
-Winvalid-memory-model diagnostics with lowercase letter.

* c-c++-common/pr83059.c: New test.

From-SVN: r254990

re PR debug/82718 (Bad DWARF5 .debug_loclists generation)

PR debug/82718
* dwarf2out.c (dw_loc_list): If crtl->has_bb_partition, temporarily
set in_cold_section_p to the partition containing loc_list->first.
When seeing loc_list->last_before_switch node, update secname and
perform range_across_switch second partition handling only after that.

* gcc.dg/debug/dwarf2/pr82718-1.c: New test.
* gcc.dg/debug/dwarf2/pr82718-2.c: New test.

From-SVN: r254989

re PR debug/82933 (valgrind error in set_cur_line_info_table with -g)

PR debug/82933
* run-rtl-passes.c: Include debug.h.
(run_rtl_passes): Call debug_hooks->assembly_start.
* dwarf2out.c (dwarf2out_assembly_start): Return early if invoked
multiple times.

* gcc.dg/rtl/x86_64/pr82933.c: New test.

From-SVN: r254987

re PR target/82981 (unnecessary __multi3 call for mips64r6 linux kernel)

PR target/82981
* internal-fn.c (expand_mul_overflow): Use OPTAB_WIDEN instead of
OPTAB_DIRECT in calls to expand_simple_binop.

From-SVN: r254986

RTEMS: Enable some libstdc++ features

libstdc++/

* acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Add rtems*.
(GLIBCXX_ENABLE_FILESYSTEM_TS): Likewise.
* configure: Regenerate.

From-SVN: r254985

libgo: fix makefile buglet

    Fix a small bug in the libgo Makefile recipe that constructs the
    directory from which to pick up libgcc_s.so ; the gccgo invocation
    with -print-libgcc-file-name was missing the flags, which meant that
    for -m32 builds we'd see the 64-bit libgcc dir.

    Reviewed-on: https://go-review.googlesource.com/78836

From-SVN: r254984

compiler: report error for ++/-- applied to a non-numeric type

    This avoids a compiler crash.

    Fixes GCC PR 83071.

    Reviewed-on: https://go-review.googlesource.com/78875

From-SVN: r254983

re PR libfortran/78549 (Very slow formatted internal file output)

2017-11-20  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

PR libgfortran/78549
* io/io.h (newunit_free): Add declaration. Clean some whitespace.
* io/transfer.c (st_read_done, st_write_done): Call newunit_free.
* io/unit.c (newunit_free): Change type from static void to void.

From-SVN: r254982

Use -Wtraditional for "would be stringified in traditional C" (PR preprocessor/81794)

libcpp/ChangeLog:

2017-03-24  Eric Gallager  <egall@gwmail.gwu.edu>

PR preprocessor/81794
* macro.c (check_trad_stringification): Have warning be controlled
by -Wtraditional.

gcc/testsuite/ChangeLog:

2017-09-17  Eric Gallager  <egall@gwmail.gwu.edu>

PR preprocessor/81794
* gcc.dg/pragma-diag-7.c: Update to include check for
stringification.

From-SVN: r254981

C/C++: more stdlib header hints (PR c/81404)

This patch extends the C frontend's "knowledge" of the C stdlib within
get_c_name_hint to cover some more macros and functions, covering
a case reported in PR c/81404 ("INT_MAX"), so that rather than printing:

  t.c:5:12: error: 'INT_MAX' undeclared here (not in a function); did you mean '__INT_MAX__'?
   int test = INT_MAX;
              ^~~~~~~
              __INT_MAX__

we instead print:

  t.c:5:12: error: 'INT_MAX' undeclared here (not in a function)
   int test = INT_MAX;
              ^~~~~~~
  t.c:5:12: note: 'INT_MAX' is defined in header '<limits.h>'; did you forget to '#include <limits.h>'?
  t.c:1:1:
  +#include <limits.h>

  t.c:5:12:
    int test = INT_MAX;
               ^~~~~~~

It also adds generalizes some of the code for this (and for the "std::"
namespace hints in the C++ frontend), moving it to a new
c-family/known-headers.cc and .h, and introducing a class known_headers.
This currently just works by scanning a hardcoded array of known
name/header associations, but perhaps in the future could be turned
into some kind of symbol database so that the compiler could record API
uses and use that to offer suggestions e.g.

foo.cc: error: 'myapi::foo' was not declared in this scope
foo.cc: note: 'myapi::foo" was declared in header 'myapi/private.h'
(included via 'myapi/public.h') when compiling 'bar.cc'; did you forget to
'#include "myapi/public.h"'?

or somesuch.

In any case, moving this to a class gives an easier way to locate the
hardcoded knowledge about the stdlib.

The patch also adds similar code to the C++ frontend covering
unqualified names in the standard library, so that rather than just
e.g.:

  t.cc:19:13: error: 'NULL' was not declared in this scope
   void *ptr = NULL;
               ^~~~

we can emit:

  t.cc:19:13: error: 'NULL' was not declared in this scope
   void *ptr = NULL;
               ^~~~
  t.cc:19:13: note: 'NULL' is defined in header '<cstddef>'; did you forget
  to '#include <cstddef>'?
  t.cc:1:1:
  +#include <cstddef>

  t.cc:19:13:
   void *ptr = NULL;
               ^~~~

(Also XFAIL for PR c++/80567 added for the C++ testcase; this is a
separate pre-existing bug exposed by the testcase for PR 81404).

gcc/ChangeLog:
PR c/81404
* Makefile.in (C_COMMON_OBJS): Add c-family/known-headers.o.

gcc/c-family/ChangeLog:
PR c/81404
* known-headers.cc: New file, based on material from c/c-decl.c.
(suggest_missing_header): Copied as-is.
(get_stdlib_header_for_name): New, based on get_c_name_hint but
heavily edited to add C++ support.  Add some knowledge about
<limits.h>, <stdint.h>, and <wchar.h>.
* known-headers.h: Likewise.

gcc/c/ChangeLog:
PR c/81404
* c-decl.c: Include "c-family/known-headers.h".
(get_c_name_hint): Rename to get_stdlib_header_for_name and move
to known-headers.cc.
(class suggest_missing_header): Move to known-header.h.
(lookup_name_fuzzy): Call get_c_stdlib_header_for_name rather
than get_c_name_hint.

gcc/cp/ChangeLog:
PR c/81404
* name-lookup.c: Include "c-family/known-headers.h"
(lookup_name_fuzzy): Call get_cp_stdlib_header_for_name and
potentially return a new suggest_missing_header hint.

gcc/testsuite/ChangeLog:
PR c/81404
* g++.dg/spellcheck-stdlib.C: New.
* gcc.dg/spellcheck-stdlib.c (test_INT_MAX): New.

From-SVN: r254980

C: hints for missing stdlib includes for macros and types

The C frontend already "knows" about many common functions in
the C standard library:

  test.c: In function 'test':
  test.c:3:3: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
     printf ("hello world\n");
     ^~~~~~
  test.c:3:3: warning: incompatible implicit declaration of built-in function 'printf'
  test.c:3:3: note: include '<stdio.h>' or provide a declaration of 'printf'

and which header file they are in.

However it doesn't know about various types and macros:

test.c:1:13: error: 'NULL' undeclared here (not in a function)
 void *ptr = NULL;
             ^~~~

This patch uses the name_hint/deferred_diagnostic machinery to
add hints for missing C standard library headers for some of the
most common type and macro names.

For example, the above becomes:
test.c:1:13: error: 'NULL' undeclared here (not in a function)
 void *ptr = NULL;
             ^~~~
test.c:1:13: note: 'NULL' is defined in header '<stddef.h>'; did you forget to '#include <stddef.h>'?

gcc/c/ChangeLog:
* c-decl.c (get_c_name_hint): New function.
(class suggest_missing_header): New class.
(lookup_name_fuzzy): Call get_c_name_hint and use it to
suggest missing headers to the user.

gcc/testsuite/ChangeLog:
* gcc.dg/spellcheck-stdlib.c: New test case.

From-SVN: r254979

C++: provide macro used-before-defined hint (PR c++/72786)

This patch uses the name_hint/deferred_diagnostic to provide
a message in the C++ frontend if a macro is used before it is defined
e.g.:

test.c:6:24: error: expected ';' at end of member declaration
   virtual void clone() const OVERRIDE { }
                        ^~~~~
                             ;
test.c:6:30: error: 'OVERRIDE' does not name a type
   virtual void clone() const OVERRIDE { }
                              ^~~~~~~~
test.c:6:30: note: the macro 'OVERRIDE' had not yet been defined
test.c:15:0: note: it was later defined here
 #define OVERRIDE override

It's possible to do it from the C++ frontend as tokenization happens
up-front (and hence the macro already exists when the above is parsed);
I attempted to do it from the C frontend, but because the C frontend only
tokenizes on-demand during parsing, the macro isn't known about until
later.

gcc/cp/ChangeLog:
PR c++/72786
* name-lookup.c (class macro_use_before_def): New class.
(lookup_name_fuzzy): Detect macro that were used before being
defined, and report them as such.

gcc/ChangeLog:
PR c++/72786
* spellcheck.h (best_match::blithely_get_best_candidate): New
accessor.

gcc/testsuite/ChangeLog:
PR c++/72786
* g++.dg/spellcheck-macro-ordering-2.C: New test case.
* g++.dg/spellcheck-macro-ordering.C: Add dg-message directives
for macro used-before-defined.

libcpp/ChangeLog:
PR c++/72786
* include/cpplib.h (cpp_macro_definition_location): New decl.
* macro.c (cpp_macro_definition): New function.

From-SVN: r254978

re PR target/81356 (__builtin_strcpy is not good for copying an empty string on aarch64)

2017-11-20  Steve Ellcey  <sellcey@cavium.com>

PR target/81356
* gfortran.dg/pr45636.f90 (aarch64*-*-*): Remove from xfail list.

From-SVN: r254977

Daily bump.

From-SVN: r254976

Avoid duplicate visibility warning.

* decl2.c (constrain_class_visibility): Don't warn about artificial
fields.

From-SVN: r254973

streambuf_iterator.h (istreambuf_iterator<>): Declare std::advance for istreambuf_iterator of char types to be friend.

2017-11-20  François Dumont  <fdumont@gcc.gnu.org>

* include/bits/streambuf_iterator.h (istreambuf_iterator<>): Declare
std::advance for istreambuf_iterator of char types to be friend.
(std::advance(istreambuf_iterator&, _Distance)): New overload.
* include/std/streambuf (basic_streambuf<>): Declare std::advance for
istreambuf_iterator of char types to be friend.
* testsuite/22_locale/money_get/get/char/9.cc: Have
istreambuf_iterator created on the fly when calling money_get<>::get.
* testsuite/22_locale/money_get/get/wchar_t/9.cc: Likewise.
* testsuite/24_iterators/istreambuf_iterator/debug/1_neg.cc: New.
* testsuite/24_iterators/istreambuf_iterator/debug/2_neg.cc: New.
* testsuite/25_algorithms/advance/istreambuf_iterators/char/1.cc: New.
* testsuite/25_algorithms/advance/istreambuf_iterators/char/1_neg.cc:
New.
* testsuite/25_algorithms/advance/istreambuf_iterators/char/2.cc: New.
* testsuite/25_algorithms/advance/istreambuf_iterators/char/2_neg.cc:
New.
* testsuite/25_algorithms/advance/istreambuf_iterators/char/3_neg.cc:
New.
* testsuite/25_algorithms/advance/istreambuf_iterators/wchar_t/1.cc:
New.
* testsuite/25_algorithms/advance/istreambuf_iterators/wchar_t/1_neg.cc:
New.
* testsuite/25_algorithms/advance/istreambuf_iterators/wchar_t/2.cc:
New.
* testsuite/25_algorithms/advance/istreambuf_iterators/wchar_t/2_neg.cc:
New.
* testsuite/25_algorithms/advance/istreambuf_iterators/wchar_t/3_neg.cc:
New.
* testsuite/25_algorithms/find/istreambuf_iterators/char/2.cc: Leverage
on std::advance overload.
* testsuite/25_algorithms/find/istreambuf_iterators/wchar_t/2.cc:
Likewise.

From-SVN: r254972

Fix failing tests caused by duplicate dg-options

* testsuite/special_functions/18_riemann_zeta/check_value.cc: Fix
duplicate dg-options directive.
* testsuite/tr1/5_numerical_facilities/special_functions/
20_riemann_zeta/check_value_neg.cc: Likewise.

From-SVN: r254971

i386.c (parse_mtune_ctrl_str): Start diagnostics with lower case letter.

* config/i386/i386.c (parse_mtune_ctrl_str): Start diagnostics
with lower case letter.

From-SVN: r254970

i386.md (bswaphi2): New expander.

* config/i386/i386.md (bswaphi2): New expander.
(*bswaphi2_movbe): New insn pattern.
(bswaphi -> rorhi pepehole2): New peephole pattern.

testsuite/ChangeLog:

* gcc.target/i386/movbe-5.c: New test.

From-SVN: r254967

re PR fortran/79072 (ICE with class(*) pointer function result and character value)

2017-11-20  Paul Thomas  <pault@gcc.gnu.org>

PR fortran/79072
* trans-expr.c (trans_class_vptr_len_assignment): Set from_len
if the temporary is unlimited polymorphic.
* trans-stmt.c (trans_associate_var): Use the fake result decl
to obtain the 'len' field from an explicit function result when
in that function scope.

2017-11-20  Paul Thomas  <pault@gcc.gnu.org>

PR fortran/79072
* gfortran.dg/class_result_5.f90: New test.

From-SVN: r254966

RISC-V: Implement __umulsidi3, umul_ppmm and __muluw3

2017-11-20  Kito Cheng  <kito.cheng@gmail.com>

        * longlong.h [__riscv] (__umulsidi3): Define.
        [__riscv] (umul_ppmm): Likewise.
        [__riscv] (__muluw3): Likewise.

From-SVN: r254965

P0329R4: Designated Initialization

P0329R4: Designated Initialization
* parser.c (cp_parser_initializer_clause): List in comment grammar
designated-initializer-list.
(cp_parser_initializer_list): Allow .identifier = without pedwarn for
C++2A, parse .identifier { ... }.  Improve location_t argument to
pedwarn.  Add pedwarn for [cst] = designators.  Diagnose ... in
designated initializer list.  Diagnose mixing designated and
non-designated initializer clauses for C++2A.  Diagnose duplicated
identifiers in designators.
* name-lookup.h (search_anon_aggr): New declaration.
* name-lookup.c (fields_linear_search): Use search_anon_aggr.
(search_anon_aggr): New function.
* typeck2.c (process_init_constructor_record): Allow designator
to skip over some non-static data members.  Handle anonymous
aggregates.  Add diagnostics for designator order not matching
member declaration order.

* g++.dg/ext/desig2.C: Adjust comment, no sorry about designator
refering to second member.
(b): New variable and associated expected diagnostic.
* g++.dg/ext/desig4.C: For C++2A expect diagnostics.
* g++.dg/ext/desig5.C: Add dg-do dg-compile and empty dg-options.
* g++.dg/ext/desig8.C: Likewise.
* g++.dg/ext/desig9.C: New test.
* g++.dg/ext/pr27019.C: Don't expect any diagnostics.
* g++.dg/init/error2.C: Adjust expected diagnostics.
* g++.dg/cpp0x/desig1.C: Add dg-options with -pedantic, expect
warning on C99 designators.
* g++.dg/cpp2a/desig1.C: New test.
* g++.dg/cpp2a/desig2.C: New test.
* g++.dg/cpp2a/desig3.C: New test.
* g++.dg/cpp2a/desig4.C: New test.
* g++.dg/cpp2a/desig5.C: New test.
* g++.dg/cpp2a/desig6.C: New test.

From-SVN: r254964

c-family: add name_hint/deferred_diagnostic

In various places we use lookup_name_fuzzy to provide a hint,
and can report messages of the form:
  error: unknown foo named 'bar'
or:
  error: unknown foo named 'bar'; did you mean 'SUGGESTION?

This patch provides a way for lookup_name_fuzzy to provide
both the suggestion above, and (optionally) additional hints
that can be printed e.g.

  note: did you forget to include <SOME_HEADER.h>?

This patch provides the mechanism and ports existing users
of lookup_name_fuzzy to the new return type.
There are no uses of such hints in this patch, but followup
patches provide various front-end specific uses of this.

gcc/c-family/ChangeLog:
* c-common.h (enum lookup_name_fuzzy_kind): Move to name-hint.h.
(lookup_name_fuzzy): Likewise.  Convert return type from
const char * to name_hint.  Add location_t param.
* name-hint.h: New header.

gcc/c/ChangeLog:
* c-decl.c: Define INCLUDE_UNIQUE_PTR before including system.h.
Include "c-family/name-hint.h"
(implicit_decl_warning): Convert "hint" from
const char * to name_hint.  Pass location to
lookup_name_fuzzy.  Suppress any deferred diagnostic if the
warning was not printed.
(undeclared_variable): Likewise for "guessed_id".
(lookup_name_fuzzy): Convert return type from const char *
to name_hint.  Add location_t param.
* c-parser.c: Define INCLUDE_UNIQUE_PTR before including system.h.
Include "c-family/name-hint.h"
(c_parser_declaration_or_fndef): Convert "hint" from
const char * to name_hint.  Pass location to lookup_name_fuzzy.
(c_parser_parameter_declaration): Likewise.

gcc/cp/ChangeLog:
* name-lookup.c: Define INCLUDE_UNIQUE_PTR before including system.h.
Include "c-family/name-hint.h"
(suggest_alternatives_for): Convert "fuzzy_name" from const char *
to name_hint, and rename to "hint".  Pass location to
lookup_name_fuzzy.
(lookup_name_fuzzy): Convert return type from const char *
to name_hint.  Add location_t param.
* parser.c: Define INCLUDE_UNIQUE_PTR before including system.h.
Include "c-family/name-hint.h"
(cp_parser_diagnose_invalid_type_name): Convert
"suggestion" from const char * to name_hint, and rename to "hint".
Pass location to lookup_name_fuzzy.

From-SVN: r254963

Makefile.in (OBJS): Add gimple-ssa-evrp-analyze.o.

* Makefile.in (OBJS): Add gimple-ssa-evrp-analyze.o.
* gimple-ssa-evrp-analyze.c: New file pulled from gimple-ssa-evrp.c.
* gimple-ssa-evrp-analyze.h: New file pulled from gimple-ssa-evrp.c.
* gimple-ssa-evrp.c: Remove bits moved into new files.  Include
gimple-ssa-evrp-analyze.h.

From-SVN: r254961

gimple-ssa-evrp.c (evrp_dom_walker::before_dom_children): Do not set BB_VISITED here.

* gimple-ssa-evrp.c (evrp_dom_walker::before_dom_children): Do not
set BB_VISITED here.
(evrp_range_analyzer::enter): Set BB_VISITED here instead.

From-SVN: r254960

[PR c++/82878] pass-by-invisiref in lambda

https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01115.html
PR c++/82878
PR c++/78495
* call.c (build_call_a): Don't set CALL_FROM_THUNK_P for inherited
ctor.
* cp-gimplify.c (cp_genericize_r): Restore THUNK dereference
inhibibition check removed in previous c++/78495 change.

PR c++/82878
* g++.dg/cpp0x/pr82878.C: New.
* g++.dg/cpp1z/inh-ctor38.C: Check moves too.

From-SVN: r254958

Implement LWG 2353

* include/bits/stl_iterator_base_funcs.h (next):
Use InputIterator instead of ForwardIterator.
* testsuite/24_iterators/operations/lwg2353.cc: New.
* testsuite/24_iterators/operations/next_neg.cc: Remove.

From-SVN: r254957

tree-predcom.c: Add general comment on Store-Store chains.

* tree-predcom.c: Add general comment on Store-Store chains.
(split_data_refs_to_components): Postpone clearing eliminate_store_p
flag in component.
(get_chain_last_ref_at): Rename into...
(get_chain_last_write_at): ...this.
(get_chain_last_write_before_load): New function.
(add_ref_to_chain): Promote type of chain from CT_STORE_LOAD to
CT_STORE_STORE when write reference is added.
(determine_roots_comp): Support load ref in CT_STORE_STORE chains.
(is_inv_store_elimination_chain): Update get_chain_last_write_at call.
(initialize_root_vars_store_elim_1): Ditto.
(initialize_root_vars_store_elim_2): Ditto.  Replace rhs once default
definition is created.
(execute_pred_commoning_chain): Support load ref in CT_STORE_STORE
chain by replacing it with dominant stored value.

gcc/testsuite
* gcc.dg/tree-ssa/predcom-dse-12.c: New test.

From-SVN: r254956

* tree-predcom.c (add_ref_to_chain): Remove check on distance.

From-SVN: r254955

VRP: x+1 and -x cannot be INT_MIN

2017-11-20  Marc Glisse  <marc.glisse@inria.fr>

gcc/
* vr-values.c (extract_range_from_binary_expr): Use a full range
for VR_VARYING.

gcc/testsuite/
PR testsuite/82951
* gcc.c-torture/execute/20040409-1.c: Move invalid tests...
* gcc.c-torture/execute/20040409-1w.c: ... here with -fwrapv.
* gcc.c-torture/execute/20040409-2.c: Move invalid tests...
* gcc.c-torture/execute/20040409-2w.c: ... here with -fwrapv.
* gcc.c-torture/execute/20040409-3.c: Move invalid tests...
* gcc.c-torture/execute/20040409-3w.c: ... here with -fwrapv.
* gcc.dg/tree-ssa/cmpmul-1.c: Tweak condition.
* gcc.dg/tree-ssa/vrp118.c: New file.

From-SVN: r254954

Add g++.dg/pr82836.C requirements

* g++.dg/pr82836.C: Require int128, __float128 support.
Add __float128 options.
(size_t): Define using __SIZE_TYPE__.

From-SVN: r254953

re PR c++/82781 (Vector extension operators return wrong result in constexpr)

PR c++/82781
* constexpr.c (cxx_eval_vector_conditional_expression): New function.
(cxx_eval_constant_expression) <case VEC_COND_EXPR>: Use it instead
of cxx_eval_conditional_expression.

* g++.dg/ext/constexpr-pr82781.C: New test.

From-SVN: r254952

re PR bootstrap/83015 (bootstrap comparison failure on ia64)

PR bootstrap/83015
* config/cr16/unwind-cr16.c (uw_install_context): Add FRAMES
parameter.
* config/xtensa/unwind-dw2-xtensa.c: Likewise
* config/ia64/unwind-ia64.c: Add frames parameter.
* unwind-sjlj.c: Likewise.

From-SVN: r254951

[ARM] Do no clobber r4 in Armv8-M nonsecure call

Expanders for Armv8-M nonsecure call unnecessarily clobber r4 despite
the libcall they perform not writing to r4.  Furthermore, the
requirement for the branch target address to be in r4 as expected by
the libcall is modeled in a convoluted way in the define_insn patterns:
the address is a register match_operand constrained by the match_dup
for the clobber which is guaranteed to be r4 due to the expander.

This patch simplifies all this by simply requiring the address to be in
r4 and removing the clobbers. Expanders are left alone because
cmse_nonsecure_call_clear_caller_saved relies on branch target memory
attributes which would be lost if expanding to reg:SI R4_REGNUM.

2017-11-20  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    gcc/
    * config/arm/arm.md (R4_REGNUM): Define constant.
    (nonsecure_call_internal): Remove r4 clobber.
    (nonsecure_call_value_internal): Likewise.
    * config/arm/thumb1.md (nonsecure_call_reg_thumb1_v5): Remove second
    clobber and resequence match_operands.
    (nonsecure_call_value_reg_thumb1_v5): Likewise.
    * config/arm/thumb2.md (nonsecure_call_reg_thumb2): Likewise.
    (nonsecure_call_value_reg_thumb2): Likewise.

From-SVN: r254950

[testsuite,arm] [Diagnostic Patch] don't print column zero

2017-11-20  Christophe Lyon  <christophe.lyon@linaro.org>

gcc/testsuite/
* gcc.target/arm/pr69180.c: Use -: for no column in expected
warnings.

From-SVN: r254949

re PR tree-optimization/78821 (GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once)

PR tree-optimization/78821
* gimple-ssa-store-merging.c (find_bswap_or_nop_load): Give up
if base is TARGET_MEM_REF.  If base is not MEM_REF, set base_addr
to the address of the base rather than the base itself.
(find_bswap_or_nop_1): Just use pointer comparison for vuse check.
(find_bswap_or_nop_finalize): New function.
(find_bswap_or_nop): Use it.
(bswap_replace): Return a tree rather than bool, change first
argument from gimple * to gimple_stmt_iterator, allow inserting
into an empty sequence, allow ins_stmt to be NULL - then emit
all stmts into gsi.  Fix up MEM_REF address gimplification.
(pass_optimize_bswap::execute): Adjust bswap_replace caller.
(struct store_immediate_info): Add N and INS_STMT non-static
data members.
(store_immediate_info::store_immediate_info): Initialize them
from newly added ctor args.
(merged_store_group::apply_stores): Formatting fixes.  Sort by
bitpos at the end.
(stmts_may_clobber_ref_p): For stores call also
refs_anti_dependent_p.
(gather_bswap_load_refs): New function.
(imm_store_chain_info::try_coalesce_bswap): New method.
(imm_store_chain_info::coalesce_immediate_stores): Use it.
(split_group): Handle LROTATE_EXPR and NOP_EXPR rhs_code specially.
(imm_store_chain_info::output_merged_store): Fail if number of
new estimated stmts is bigger or equal than old.  Handle LROTATE_EXPR
and NOP_EXPR rhs_code.
(pass_store_merging::process_store): Compute n and ins_stmt, if
ins_stmt is non-NULL and the store rhs is otherwise invalid, use
LROTATE_EXPR rhs_code.  Pass n and ins_stmt to store_immediate_info
ctor.
(pass_store_merging::execute): Calculate dominators.

* gcc.dg/store_merging_16.c: New test.

From-SVN: r254948

tree-ssa-math-opts.c (nop_stats, [...]): Moved to ...

* tree-ssa-math-opts.c (nop_stats, bswap_stats, struct symbolic_number,
BITS_PER_MARKER, MARKER_MASK, MARKER_BYTE_UNKNOWN, HEAD_MARKER, CMPNOP,
CMPXCHG, do_shift_rotate, verify_symbolic_number_p,
init_symbolic_number, find_bswap_or_nop_load, perform_symbolic_merge,
find_bswap_or_nop_1, find_bswap_or_nop, pass_data_optimize_bswap,
class pass_optimize_bswap, bswap_replace,
pass_optimize_bswap::execute): Moved to ...
* gimple-ssa-store-merging.c: ... this file.
Include optabs-tree.h.
(nop_stats, bswap_stats, do_shift_rotate, verify_symbolic_number_p,
init_symbolic_number, find_bswap_or_nop_load, perform_symbolic_merge,
find_bswap_or_nop_1, find_bswap_or_nop, bswap_replace): Put into
anonymous namespace, remove static keywords.
(pass_optimize_bswap::gate): Test BITS_PER_UNIT == 8 here...
(pass_optimize_bswap::execute): ... rather than here.  Formatting fix.

From-SVN: r254947

re PR bootstrap/83062 (Bootstrap failure: libsanitizer/tsan/tsan_rtl.h:713:44: error: inlining failed in call to always_inline ‘void __tsan::MemoryRead(__tsan::ThreadState*, __sanitizer::uptr, __sanitizer: :uptr, int)’: caller is not optimized)

PR bootstrap/83062
* ipa-inline.c (can_inline_edge_p): Fix typo in previous patch.

From-SVN: r254946

vec.h (debug_helper): New function.

* vec.h (debug_helper): New function.
(DEFINE_DEBUG_VEC): New macro.
* hash-set.h (debug_helper): New function.
(DEFINE_DEBUG_HASH_SET): New macro.
* cfg.c (debug_slim (edge)): New function.
Call DEFINE_DEBUG_VEC for edges.
Call DEFINE_DEBUG_HASH_SET for edges.
* cfghooks.c (debug_slim (basic_block)): New function.
Call DEFINE_DEBUG_VEC for basic blocks.
Call DEFINE_DEBUG_HASH_SET for basic blocks.
* print-tree.c (debug_slim): New function to handle trees.
Call DEFINE_DEBUG_VEC for trees.
Call DEFINE_DEBUG_HASH_SET for trees.
(debug (vec<tree, va_gc>) &): Remove.
(debug (<vec<tree, va_gc>) *): Remove.
* print-rtl.c (debug_slim): New function to handle const_rtx.
Call DEFINE_DEBUG_VEC for rtx_def.
Call DEFINE_DEBUG_VEC for rtx_insn.
Call DEFINE_DEBUG_HASH_SET for rtx_def.
Call DEFINE_DEBUG_HASH_SET for rtx_insn.
* sel-sched-dump.c (debug (vec<rtx_insn *> &): Remove.
(debug (vec<rtx_insn *> *ptr): Remove.
(debug_insn_vector): Remove.
* stor-layout.c (debug_rli): Call debug() instead of debug_vec_tree.

From-SVN: r254945

Fix comparison mode in simplify_ternary_operation

2017-11-20  Tom de Vries  <tom@codesourcery.com>

PR rtl-optimization/82020
* simplify-rtx.c (simplify_ternary_operation): Fix comparison mode of
IF_THEN_ELSE condition.

From-SVN: r254944

Daily bump.

From-SVN: r254943

re PR ada/83016 (gnat1: warning: command line option ‘-nostdinc++’ is valid for C++/ObjC++ but not for Ada)

PR ada/83016
* gnatlink.adb (Process_Args): Accept multiple switches for --LINK.
(Usage): Adjust.
* gcc-interface/Makefile.in (GCC_LINK): Remove $(ADA_INCLUDES).
(common-tools): Pass $(CC) as --GCC= and $(GCC_LINK) as --LINK= in
the invocations of $(GNATLINK).
(../../gnatdll$(exeext)): Likewise.
(../../vxaddr2line$(exeext)): Likewise.
(gnatmake-re): Likewise.
(gnatlink-re): Likewise.

From-SVN: r254940

re PR target/82281 (Bulldozer/Zen tuning: uses XMM for single 64-bit integer AND, even with a simple mask)

PR target/82281
* gcc.target/i386/pr82281.c: New testcase.

From-SVN: r254939

tree-ssa-dom.c (record_equivalences_from_phis): Fix handling of degenerates resulting from ignoring an edge.

        * tree-ssa-dom.c (record_equivalences_from_phis): Fix handling
        of degenerates resulting from ignoring an edge.

From-SVN: r254938

re PR ipa/81360 (ice in estimate_edge_growth, at ipa-inline.h:86)

PR ipa/81360
* ipa-inline.c (can_inline_edge_p): Also check that caller is optimized
* gcc.c-torture/compile/pr81360.c: New testcase.

From-SVN: r254937

re PR fortran/78990 (ICE when assigning polymorphic array function result)

2017-11-19  Paul Thomas  <pault@gcc.gnu.org>

PR fortran/78990
* expr.c (gfc_is_class_array_function): Renamed from
'gfc_is_alloc_class_array_function' and modified to return true
for pointers as well as allocatable results.
* gfortran.h : Change of name for prototype of above function.
* trans-array.c (gfc_add_loop_ss_code): Force finalization of
class array results.
(build_class_array_ref): Change assertion into a condition.
(build_class_array_ref): Set the se class_vptr for class array
function results.
(gfc_walk_function_expr): Reference gfc_is_class_array_function
as above.
* trans-decl.c (get_proc_result): Move it up before
gfc_trans_deferred_vars.
(gfc_trans_deferred_vars): Nullify explicit return class arrays
on entry.
* trans-expr.c (gfc_conv_class_to_class): Allow conversion of
class array functions that have an se class_vptr and use it
for the result vptr.
(gfc_conv_subref_array_arg): Rename reference to the above
function.
(gfc_conv_procedure_call): Ditto. Add the se pre block to the
loop pre block before the function is evaluated. Do not
finalize class pointer results.
(arrayfunc_assign_needs_temporary, gfc_trans_assignment_1) More
renamed references.
* trans-intrinsic.c (gfc_conv_intrinsic_size): Ditto.

2017-11-19  Paul Thomas  <pault@gcc.gnu.org>

PR fortran/78990
* gfortran.dg/class_67.f90: New test.

From-SVN: r254936

re PR ipa/83001 (ICE in edge_badness, at ipa-inline.c:1025)

PR ipa/83001
* profile-count.c (profile_count::to_sreal_scale): Fix return value
for uninitialied counts.

From-SVN: r254935

re PR ipa/60243 (IPA is slow on large cgraph tree)

PR ipa/60243
* tree-inline.c (estimate_num_insns): Set to 1 at least.

From-SVN: r254934

re PR target/82713 (ICE in ix86_builtin_vectorization_cost, at config/i386/i386.c:44475)

PR target/82713
* i386.c (ix86_builtin_vectorization_cost): Be ready for insane
types.

From-SVN: r254933

re PR c/66618 (Failure to diagnose non-constant initializer for static object with -O1)

PR c/66618
PR c/69960
c-family/
* c-common.h (c_fully_fold): Add LVAL argument defaulted to false.
c/
* c-parser.c (c_parser_omp_atomic): Pass true as LVAL to c_fully_fold
where needed.
* c-typeck.c (build_unary_op, build_modify_expr, build_asm_expr,
handle_omp_array_sections): Likewise.
(digest_init): Don't call decl_constant_value_for_optimization.
* c-tree.h (decl_constant_value_for_optimization): Removed.
* c-fold.c (c_fold_array_ref): New function.
(c_fully_fold_internal): Add LVAL argument, propagate it through
recursive calls.  For VAR_P call decl_constant_value and
unshare if not LVAL and either optimizing or IN_INIT.  Remove
decl_constant_value_for_optimization calls.  If IN_INIT and not LVAL,
fold ARRAY_REF with STRING_CST and INTEGER_CST operands.
(c_fully_fold): Add LVAL argument, pass it through to
c_fully_fold_internal.
(decl_constant_value_for_optimization): Removed.
cp/
* cp-gimplify.c (c_fully_fold): Add LVAL argument, call
cp_fold_maybe_rvalue instead of cp_fold_rvalue and pass it !LVAL.
testsuite/
* gcc.dg/pr69960.c: New test.
* gcc.dg/pr66618.c: New test.
* gcc.dg/pr66618-2.c: New test.

From-SVN: r254930