Part 3/3 for contributing PPC64LE support for X86 SSE instrisics.
This patch includes testsuite/gcc.target tests for the intrinsics
in xmmintrin.h.  For these tests I added -Wno-psabi to dg-options
to suppress warnings associated with the vector ABI change in GCC5.

From-SVN: r251357

Part 2/3 for contributing PPC64LE support for X86 SSE instrisics.

Part 2/3 for contributing PPC64LE support for X86 SSE
instrisics. This patch includes the new (for PPC) xmmintrin.h,
changes x86intrin.h to include xmmintrin.h and associated
config.gcc changes.

From-SVN: r251356

re PR target/81504 (gcc-7 regression: vec_st  in loop misoptimized)

2017-08-25  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

PR target/81504
* config/rs6000/rs6000-p8swap.c (find_alignment_op): Add reference
parameter and_insn and return it.
(recombine_lvx_pattern): Insert a copy to ensure availability of
the base register of the copied masking operation at the point of
the instruction replacement.
(recombine_stvx_pattern): Likewise.

From-SVN: r251355

rs6000.opt (-mpower9-dform-scalar): Delete undocumented switches.

[gcc]
2017-08-24  Michael Meissner  <meissner@linux.vnet.ibm.com>

* config/rs6000/rs6000.opt (-mpower9-dform-scalar): Delete
undocumented switches.
(-mpower9-dform-vector): Likewise.
(-mpower9-dform): Likewise.
* config/rs6000/rs6000-c.c (rs6000_target_modify_macros): Update
comments to delete references to -mpower9-dform* switches.
* config/rs6000/predicates.md (vsx_quad_dform_memory_operand):
Delete reference to -mpower9-dform* switches, test for
-mpower9-vector instead.
* config/rs6000/rs6000-cpus.def (ISA_3_0_MASKS_SERVER): Likewise.
(OTHER_P9_VECTOR_MASKS): Likewise.
(POWERPC_MASKS): Likewise.
* config/rs6000/rs6000.c (rs6000_setup_reg_addr_masks): Change
tests against -mpower9-dform* to -mpower9-vector.  Delete code
that checked for -mpower9-dform* consistancy with other options.
Add test for -mpower9-misc to enable other power9 switches.
(rs6000_init_hard_regno_mode_ok): Likewise.
(rs6000_option_override_internal): Likewise.
(rs6000_emit_prologue): Likewise.
(rs6000_emit_epilogue): Likewise.
(rs6000_opt_masks): Delete -mpower9-dform-{scalar,vector}.
(rs6000_disable_incompatiable_switches): Delete -mpower9-dform.
(emit_fusion_p9_load): Change tests for -mpower9-dform-scalar
-mpower9-vector.
(emit_fusion_p9_store): Likewise.
* config/rs6000/rs6000.h (TARGET_P9_DFORM_SCALAR): Delete
resetting these macros if the assembler does not support ISA 3.0
instructions.
(TARGET_P9_DFORM_VECTOR): Likewise.
* config/rs6000/rs6000.md (peepholes to optimize altivec memory):
Change to use -mpower9-vector instead of -mpower9-dform-scalar.

[gcc/testsuite]
2017-08-24  Michael Meissner  <meissner@linux.vnet.ibm.com>

* gcc.target/powerpc/dform-1.c: Delete -mpower9-dform*
options.
* gcc.target/powerpc/dform-2.c: Likewise.
* gcc.target/powerpc/dform-3.c: Likewise.
* gcc.target/powerpc/pr71656-1.c: Likewise.
* gcc.target/powerpc/pr71656-2.c: Likewise.
* gcc.target/powerpc/pr80103-1.c: Likewise.
* gcc.target/powerpc/pr80098-1.c: Likewise.

From-SVN: r251352

re PR target/81921 (Fails to always-inline intrinsics with -flto)

Retabify 2017-08-24  Richard Biener  <rguenther@suse.de>
PR target/81921

From-SVN: r251351

class.c (method_name_cmp, [...]): Method names can never be NULL.

* class.c (method_name_cmp, resort_method_name_cmp): Method names
can never be NULL.

From-SVN: r251350

PR81747, ICE in operator[]

PR rtl-optimization/81747
* cse.c (cse_extended_basic_block): Don't attempt to record
equivalences for degenerate conditional branches that branch
to their fall-through.

From-SVN: r251349

Conversion operators have a special name

Conversion operators have a special name
* cp-tree.h (CPTI_CONV_OP_MARKER, CPTI_CONV_OP_IDENTIFIER): New.
(conv_op_marker, conv_op_identifier): New.
(CLASSTYPE_FIRST_CONVERSION_SLOT): Delete.
* decl.c (initialize_predefined_identifiers): Add
conv_op_identifier.
(cxx_init_decl_processing): Create conv_op_marker.
* decl2.c (check_classfn): Lookup conv-ops by name.
* class.c (add_method): Use conv_op_identifier & conv_op_marker.
(resort_type_method_vec): Don't skip conv-ops.
(finish_struct_methods, warn_hidden): Likewise.
* name-lookup.h (lookup_all_conversions): Delete.
* name-lookup.c (lookup_conversion_operator): Replace with ...
(extract_conversion_operator): ... this.
(lookup_fnfields_slot_nolazy): Find conv-ops by name.
(lookup_all_conversions): Delete.
* pt.c (check_explicit_specialization): Find conv-ops by name.
* search.c (lookup_conversions_r): Likewise.

From-SVN: r251348

PR middle-end/81908 - FAIL: gfortran.dg/alloc_comp_auto_array_2.f90 -O3 -g -m32

gcc/ChangeLog:

PR middle-end/81908
* gimple-fold.c (size_must_be_zero_p): New function.
(gimple_fold_builtin_memory_op): Call it.

gcc/testsuite/ChangeLog:

PR middle-end/81908
* gcc.dg/tree-ssa/builtins-folding-gimple-2.c: New test.
* gcc.dg/tree-ssa/builtins-folding-gimple-3.c: New test.
* gcc.dg/tree-ssa/pr81908.c: New test.

From-SVN: r251347

Daily bump.

From-SVN: r251346

stl_list.h [!_GLIBCXX_INLINE_VERSION](_List_base<>::_S_distance): Remove.

2017-08-24  François Dumont  <fdumont@gcc.gnu.org>

* include/bits/stl_list.h
[!_GLIBCXX_INLINE_VERSION](_List_base<>::_S_distance): Remove.
(_List_impl(_Node_alloc_type&&, _List_impl&&)): New.
(_List_base(_Node_alloc_type&&, _List_base&&)): New, use latter.
[!_GLIBCXX_INLINE_VERSION](_List_base(_Node_alloc_type&&,_List_base&&)):
Remove.
(_List_base(_Node_alloc_type&&)): New.
[!_GLIBCXX_INLINE_VERSION](_List_base<>::_M_distance): Remove.
[!_GLIBCXX_INLINE_VERSION](_List_base<>::_M_node_count): Remove.
(list<>::_M_node_count): New.
(list<>::size()): Adapt to call latter.
(list<>::_S_distance(const_iterator, const_iterator)): New.
(list<>::splice(iterator, list&, const_iterator, const_iterator)):
Adapt to call latter.
(list(list&&, const allocator_type&, true_type)): New.
(list(list&&, const allocator_type&, false_type)): New.
(list(list&&, const allocator_type&)): Adapt to call latters.

From-SVN: r251342

rs6000.opt (-mpower9-dform-scalar): Delete undocumented switches.

[gcc]
2017-08-24  Michael Meissner  <meissner@linux.vnet.ibm.com>

* config/rs6000/rs6000.opt (-mpower9-dform-scalar): Delete
undocumented switches.
(-mpower9-dform-vector): Likewise.
(-mpower9-dform): Likewise.
* config/rs6000/rs6000-c.c (rs6000_target_modify_macros): Update
comments to delete references to -mpower9-dform* switches.
* config/rs6000/predicates.md (vsx_quad_dform_memory_operand):
Delete reference to -mpower9-dform* switches, test for
-mpower9-vector instead.
* config/rs6000/rs6000-cpus.def (ISA_3_0_MASKS_SERVER): Likewise.
(OTHER_P9_VECTOR_MASKS): Likewise.
(POWERPC_MASKS): Likewise.
* config/rs6000/rs6000.c (rs6000_setup_reg_addr_masks): Change
tests against -mpower9-dform* to -mpower9-vector.  Delete code
that checked for -mpower9-dform* consistancy with other options.
Add test for -mpower9-misc to enable other power9 switches.
(rs6000_init_hard_regno_mode_ok): Likewise.
(rs6000_option_override_internal): Likewise.
(rs6000_emit_prologue): Likewise.
(rs6000_emit_epilogue): Likewise.
(rs6000_opt_masks): Delete -mpower9-dform-{scalar,vector}.
(rs6000_disable_incompatiable_switches): Delete -mpower9-dform.
(emit_fusion_p9_load): Change tests for -mpower9-dform-scalar
-mpower9-vector.
(emit_fusion_p9_store): Likewise.
* config/rs6000/rs6000.h (TARGET_P9_DFORM_SCALAR): Delete
resetting these macros if the assembler does not support ISA 3.0
instructions.
(TARGET_P9_DFORM_VECTOR): Likewise.
* config/rs6000/rs6000.md (peepholes to optimize altivec memory):
Change to use -mpower9-vector instead of -mpower9-dform-scalar.

[gcc/testsuite]
2017-08-24  Michael Meissner  <meissner@linux.vnet.ibm.com>

* gcc.target/powerpc/dform-1.c: Delete -mpower9-dform*
options.
* gcc.target/powerpc/dform-2.c: Likewise.
* gcc.target/powerpc/dform-3.c: Likewise.
* gcc.target/powerpc/pr71656-1.c: Likewise.
* gcc.target/powerpc/pr71656-2.c: Likewise.
* gcc.target/powerpc/pr80103-1.c: Likewise.
* gcc.target/powerpc/pr80098-1.c: Likewise.

From-SVN: r251341

Conversion operators kept on single overload set

Conversion operators kept on single overload set
* class.c (add_method): Keep all conv-ops on one slot.
* name-lookup.c (lookup_conversion_operator): Pull the desired
conv op out of overload set.
* search.c (lookup_conversions_r): Lose template/non-template
distinction.
(lookup_conversions): Likewise.

From-SVN: r251340

Adds the powerpc equivalent mm_malloc.h header which is needed by xmmintrin.h...

Adds the powerpc equivalent mm_malloc.h header which is needed by
xmmintrin.h and cleans up some noisy warnings from the previous MMX
commit.

From-SVN: r251339

target-supports.exp: Group together target-dependant checks.

* lib/target-supports.exp: Group together target-dependant checks.

From-SVN: r251338

re PR tree-optimization/81913 (wrong code at -O1)

PR tree-optimization/81913
* tree-ssa-loop-niter.c (number_of_iterations_cond): Skip niter
analysis when either IVs in condition can wrap.

gcc/testsuite
* gcc.c-torture/execute/pr81913.c: New test.
* gcc.dg/tree-ssa/loop-niter-1.c: New test.
* gcc.dg/tree-ssa/loop-niter-2.c: New test.

From-SVN: r251337

C: fix logic within c_expr::get_location

In r251239 I added a c_expr::get_location method for use by
c_parser_expr_list for building the vec<location_t> for
an expression list, rather than using the location of the first token.

When determining whether to use the location within the tree node,
or fall back to the range in the c_expr, I used EXPR_CAN_HAVE_LOCATION,
rather than EXPR_HAS_LOCATION.  This meant that any tree nodes of kinds
that *can* have a location but which erroneously had
   EXPR_LOCATION (value) == UNKNOWN_LOCATION
had that value added to the vec<location_t>, leading to missing
location information when reporting on the issue
(seen with gcc.dg/Wtraditional-conversion-2.c for m68k).

This patch addresses this in two ways:

(a) it fixes the specific issue in this failing test case, by
    setting up the location properly on the EXCESS_PRECISION_EXPR.

(b) updating c_expr::get_location by only using the EXPR_LOCATION
    if it's sane.  Arguably this is papering over bugs, but they are
    pre-existing ones exposed by r251239, and I'd rather have this
    fix in place than play whack-a-mole on any other such "missing
    location" bugs that are lurking in the codebase.

gcc/c/ChangeLog:
* c-tree.h (c_expr::get_location) Use EXPR_HAS_LOCATION rather
than CAN_HAVE_LOCATION_P when determining whether to use the
location_t value within "value".

gcc/c-family/ChangeLog:
* c-lex.c (interpret_float): Use token location
when building an EXCESS_PRECISION_EXPR.

From-SVN: r251335

dwarf2out.c (MAX_ARTIFICIAL_LABEL_BYTES): Increase to 40.

* dwarf2out.c (MAX_ARTIFICIAL_LABEL_BYTES): Increase to 40.
* dwarf2cfi.c (MAX_ARTIFICIAL_LABEL_BYTES): Remove.

From-SVN: r251334

re PR target/81921 (Fails to always-inline intrinsics with -flto)

2017-08-23  Richard Biener  <rguenther@suse.de>

        PR target/81921
        * targhooks.c (default_target_can_inline_p): Properly
        use target_option_default_node when no DECL_FUNCTION_SPECIFIC_TARGET
        is present and always compare.
        * config/i386/i386.c (ix86_valid_target_attribute_tree): Do not
imply -mfpmath=sse from TARGET_SSE_P.
        (ix86_can_inline_p): Properly use target_option_default_node when
        no DECL_FUNCTION_SPECIFIC_TARGET is present and always compare.

* gcc.target/i386/pr81921.c: New testcase.

From-SVN: r251333

re PR debug/81936 (ICE in dwarf2out_die_ref_for_decl, at dwarf2out.c:5543)

2017-08-24  Richard Biener  <rguenther@suse.de>

PR debug/81936
* dwarf2out.c (output_die): Handle flag_generate_offload like
flag_generate_lto.
(output_comp_unit): Likewise.
(gen_array_type_die): Likewise.
(dwarf2out_early_finish): Likewise.
(note_variable_value_in_expr): Likewise.
(dwarf2out_finish): Likewise.  Adjust assert.
* cgraphunit.c (symbol_table::compile): Move setting of
flag_generate_offload earlier ...
(symbol_table::finalize_compilation_unit): ... here, before
early debug finalization.

From-SVN: r251332

i386.c: Include symbol-summary.h, ipa-prop.h and ipa-fnsummary.h.

2017-08-24  Richard Biener  <rguenther@suse.de>

* config/i386/i386.c: Include symbol-summary.h, ipa-prop.h
and ipa-fnsummary.h.
(ix86_can_inline_p): When ix86_fpmath flags do not match
check whether the callee uses FP math at all.

From-SVN: r251330

re PR middle-end/81931 (r251260 breaks many tests on powerpc64)

PR middle-end/81931
* tree-ssanames.c (get_nonzero_bits): Use element_precision
instead of TYPE_PRECISION.

From-SVN: r251328

Make more use of subreg_offset_from_lsb

This patch makes use of the subreg_offset_from_lsb function
added by an earlier patch in the SVE series.

2017-08-24  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* combine.c (make_extraction): Use subreg_offset_from_lsb.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251326

Daily bump.

From-SVN: r251325

PR target/80969 - Fix ICE with -mabi=ms -mavx512f, reduce wasted space when realigning stack.

2017-08-23  Daniel Santos  <daniel.santos@pobox.com>

* config/i386/i386.h (ix86_frame::stack_realign_allocate_offset):
Remove field.
(ix86_frame::stack_realign_allocate): New field.
(struct machine_frame_state): Modify comments.
(machine_frame_state::sp_realigned_fp_end): New field.
* config/i386/i386.c (ix86_compute_frame_layout): Rework stack frame
layout calculation.
(sp_valid_at): Add assertion to assure no attempt to access invalid
offset of a realigned stack.
(fp_valid_at): Likewise.
(choose_baseaddr): Modify comments.
(ix86_emit_outlined_ms2sysv_save): Adjust to changes in
ix86_expand_prologue.
(ix86_expand_prologue): Modify stack realignment and allocation.
(ix86_expand_epilogue): Modify comments.
* doc/sourcebuild.texi: Add documentation for target selectors avx2,
avx2_runtime, avx512f, and avx512f_runtime.

2017-08-23  Daniel Santos  <daniel.santos@pobox.com>

* gcc.target/i386/pr80969-1.c: New testcase.
* gcc.target/i386/pr80969-2a.c: Likewise.
* gcc.target/i386/pr80969-2.c: Likewise.
* gcc.target/i386/pr80969-3.c: Likewise.
* gcc.target/i386/pr80969-4a.c: Likewise.
* gcc.target/i386/pr80969-4b.c: Likewise.
* gcc.target/i386/pr80969-4.c: Likewise.
* gcc.target/i386/pr80969-4.h: New header common to pr80969-4*.c
* lib/target-supports.exp (check_avx512_os_support_available,
check_avx512f_hw_available, check_effective_target_avx512f_runtime):
New proceedures for target avx512f and avx512f_runtime selectors.
(check_avx2_hw_available): Fix breakage due NULL being undefined.

From-SVN: r251321

cp-tree.h (lookup_field_1, [...]): Move declatations to ...

* cp-tree.h (lookup_field_1, lookup_fnfields_slot,
lookup_fnfields_slot_nolazy, lookup_all_conversions): Move
declatations to ...
* name-lookup.h (lookup_field_1, lookup_fnfields_slot,
lookup_fnfields_slot_nolazy, lookup_all_conversions): ... here.
* search.c (lookup_conversion_operator,
lookup_fnfields_slot_nolazy, lookup_field_1, lookup_fnfields_slot,
lookup_all_conversions): Move to ...
* name-lookup.c (lookup_conversion_operator,
lookup_fnfields_slot_nolazy, lookup_field_1, lookup_fnfields_slot,
lookup_all_conversions): ... here.

From-SVN: r251319

semantics.c (finish_member_declaration): Move USING_DECL check earlier.

* semantics.c (finish_member_declaration): Move USING_DECL check
earlier.  Always set C++ linkage.  Commonize TYPE_FIELD and
template decl list insertion.

From-SVN: r251317

cp-tree.h (maybe_version_functions): Declare.

* cp-tree.h (maybe_version_functions): Declare.
* decl.c (decls_match): Break function versioning check to
separate function.  Call it.
(maybe_version_functions): Broken out of decls_match.
* class.c (add_method): Use maybe_version_functions.

From-SVN: r251316

cp-tree.h (print_search_statistics, [...]): Don't declare.

* cp-tree.h (print_search_statistics,
reinit_search_statistics): Don't declare.
* search.c (n_fields_searched, n_calls_lookup_field,
n_calls_lookup_field_1, n_calls_lookup_fnfields,
n_calls_lookup_fnfields_1, n_calls_get_base_type,
n_outer_fields_searched, n_contexts_saved): Delete.
(lookup_field_1, lookup_member,
lookup_fnfields_slot_nolazy): Remove stat gathering.
(print_search_statistics, reinit_search_statistics): Delete.
* tree.c (cxx_print_statistics): Don't print search stats.

From-SVN: r251315

testsuite: add param-type-mismatch.c/C testcases as a baseline

gcc/testsuite/ChangeLog:
* g++.dg/diagnostic/param-type-mismatch.C: New test acse.
* gcc.dg/param-type-mismatch.c: New test case.

From-SVN: r251312

i386.opt: Remove unneeded Init(0) initializations.

* config/i386/i386.opt: Remove unneeded Init(0) initializations.
(mstackrealign): Do not init to -1.
* config/i386/i386.c (ix86_option_override_internal):
Check opts_set, not opts when setting default value of
opts->x_ix86_force_align_arg_pointer.

From-SVN: r251311

fold-vec-perm-char.c: New.

[gcc/testsuite]

2017-08-23  Will Schmidt  <will_schmidt@vnet.ibm.com>

* gcc.target/powerpc/fold-vec-perm-char.c: New.
* gcc.target/powerpc/fold-vec-perm-double.c: New.
* gcc.target/powerpc/fold-vec-perm-float.c: New.
* gcc.target/powerpc/fold-vec-perm-int.c: New.
* gcc.target/powerpc/fold-vec-perm-longlong.c: New.
* gcc.target/powerpc/fold-vec-perm-pixel.c: New.
* gcc.target/powerpc/fold-vec-perm-short.c: New.

From-SVN: r251310

ChangeLog: Fix last entry.

2017-08-23  Richard Biener  <rguenther@suse.de>

        * testsuite/ChangeLog: Fix last entry.

From-SVN: r251309

function.c (fndecl_name): Use verbosity 1 (no arguments) for lang_hooks.decl_printable_name.

2017-08-23  Richard Biener  <rguenther@suse.de>

* function.c (fndecl_name): Use verbosity 1 (no arguments) for
lang_hooks.decl_printable_name.
* print-rtl-function.c (print_rtx_function): Likewise.
* tree-pretty-print.c (dump_function_header): Likewise.

* g++.dg/cpp1y/constexpr-instantiate.C: Adjust.
* g++.dg/tree-ssa/pr45605.C: Likewise.
* gnat.dg/noinline2.ad: Likewise.b
* gnat.dg/renaming6.ad: Likewise.b
* gnat.dg/renaming6.ad: Likewise.s
* gnat.dg/specs/noinline3.ad: Likewise.s

From-SVN: r251308

re PR lto/81940 (internal compiler error: in dwarf2out_abstract_function, at dwarf2out.c:21613)

2017-08-23  Richard Biener  <rguenther@suse.de>

PR lto/81940
* dwarf2out.c (dwarf2out_abstract_function): Handle LTO with
-g0 at compile-time.

* g++.dg/lto/pr81940_0.C: New testcase.

From-SVN: r251306

re PR middle-end/19706 (Recognize common Fortran usages of copysign.)

2017-08-23  Tamar Christina  <tamar.christina@arm.com>

PR middle-end/19706
* doc/sourcebuild.texi (Other hardware attributes):
Document xorsign.

gcc/testsuite
2017-08-23  Tamar Christina  <tamar.christina@arm.com>

PR middle-end/19706
* gcc.dg/tree-ssa/pr19706.c: New.
* lib/target-supports.exp (check_effective_target_xorsign): New.

From-SVN: r251304

re PR middle-end/19706 (Recognize common Fortran usages of copysign.)

2017-08-23  Tamar Christina  <tamar.christina@arm.com>

PR middle-end/19706
* tree-ssa-math-opts.c (convert_expand_mult_copysign):
Fix single-use check.

From-SVN: r251303

Fix broken MinGW build of gcc.c

2017-08-23  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    gcc/
    * gcc.c (execute): Only test for SIGKILL and SIGQUIT if available.

From-SVN: r251302

Daily bump.

From-SVN: r251300

Move entry to correct ChangeLog.

From-SVN: r251294

Add missing ChangeLog entry for previous commit

From-SVN: r251290

docs: Explain how to use multiple file-name patterns in RUNTESTFLAGS

* doc/install.texi: Modify to add more details on running
selected tests.

From-SVN: r251289

PR target/71958: Error on -mx32 with -mabi=ms

gcc/ChangeLog:
2017-08-11  Daniel Santos  <daniel.santos@pobox.com>

* config/i386/i386.c (ix86_option_override_internal): Error when
-mx32 is combined with -mabi=ms.
(ix86_function_type_abi): Limit errors for mixing -mx32 with
attribute ms_abi.

gcc/testsuite/ChangeLog:
2017-08-11  Daniel Santos  <daniel.santos@pobox.com>

* gcc.target/i386/pr71958.c: New test to verify error on -mx32
and -mabi=ms
  * gcc.target/i386/pr64409.c: Modify to only run on x32.
* gcc.target/i386/pr46470.c: Modify to skip x32 target.
  * gcc.target/i386/pr66275.c: Likewise.
  * gcc.target/i386/pr68018.c: Likewise.

From-SVN: r251287

re PR tree-optimization/81488 (gcc goes off the limits allocating memory in gimple-ssa-strength-reduction.c)

2017-08-22  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

PR tree-optimization/81488
* gimple-ssa-strength-reduction (struct slsr_cand_d): Add visited
and cached_basis fields.
(MAX_SPREAD): New constant.
(alloc_cand_and_find_basis): Initialize new fields.
(clear_visited): New function.
(create_phi_basis_1): Rename from create_phi_basis, set visited
and cached_basis fields.
(create_phi_basis): New wrapper function.
(phi_add_costs_1): Rename from phi_add_costs, add spread
parameter, set visited field, short-circuit when limits reached.
(phi_add_costs): New wrapper function.
(record_phi_increments_1): Rename from record_phi_increments, set
visited field.
(record_phi_increments): New wrapper function.
(phi_incr_cost_1): Rename from phi_incr_cost, set visited field.
(phi_incr_cost): New wrapper function.
(all_phi_incrs_profitable_1): Rename from
all_phi_incrs_profitable, set visited field.
(all_phi_incrs_profitable): New wrapper function.

From-SVN: r251286

Make more use of paradoxical_subreg_p

This patch makes more use of the existing paradoxical_subreg_p
predicate and also adds a version that operates on outer and
inner modes.

Some of the affected tests were based on GET_MODE_SIZE rather than
GET_MODE_PRECISION and so the patch could change the result for modes
that have the same size but different precisions.  I think in each
case the change should be a no-op or more correct, since a mode with
precision N bits can't be expected to hold all of a mode with precision
M>N bits.

The patch changes the branch taken in simplify_subreg for modes with
equal precision, but the new form matches the commentary more closely.
Both branches should be equally good in that situation.

2017-08-22  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* rtl.h (paradoxical_subreg_p): Define inline, and add a version
that takes the outer and inner modes.
* doc/rtl.texi: Use paradoxical_subreg_p instead of a GET_MODE_SIZE
comparison as the canonical test for a paradoxical subreg.
* combine.c (simplify_set): Use paradoxical_subreg_p.
(make_extraction): Likewise.
(force_to_mode): Likewise.
(rtx_equal_for_field_assignment_p): Likewise.
(gen_lowpart_for_combine): Likewise.
(simplify_comparison): Likewise.
* cse.c (equiv_constant): Likewise.
* expmed.c (store_bit_field_1): Likewise.
* final.c (alter_subreg): Likewise.
* fwprop.c (propagate_rtx): Likewise.
(forward_propagate_subreg): Likewise.
* ira-conflicts.c (ira_build_conflicts): Likewise.
* lower-subreg.c (simplify_gen_subreg_concatn): Likewise.
* lra-constraints.c (curr_insn_transform): Likewise.
(split_reg): Likewise.
* lra-eliminations.c (move_plus_up): Likewise.
(lra_eliminate_regs_1): Likewise.
* recog.c (general_operand): Likewise.
* ree.c (combine_reaching_defs): Likewise.
* reload.c (push_reload): Likewise.
(find_reloads): Likewise.
* reload1.c (elimination_effects): Likewise.
(compute_reload_subreg_offset): Likewise.
(choose_reload_regs): Likewise.
* rtlanal.c (subreg_lsb_1): Likewise.
* simplify-rtx.c (simplify_unary_operation_1): Likewise.
(simplify_subreg): Likewise.
* var-tracking.c (track_loc_p): Likewise.
* emit-rtl.c (byte_lowpart_offset): Likewise.
(paradoxical_subreg_p): Delete out-of-line definition.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251282

fold-vec-sums-int.c: New.

[gcc/testsuite]

2017-08-22  Will Schmidt  <will_schmidt@vnet.ibm.com>

* gcc.target/powerpc/fold-vec-sums-int.c: New.

From-SVN: r251281

re PR tree-optimization/81741 (Misoptimisation : replacing a constant field read access by a function call)

PR tree-optimization/81741
PR tree-optimization/71947
* tree-ssa-dom.c: Include tree-inline.h.
(record_temporary_equivalences): Only record SSA_NAME = SSA_NAME
equivalences if one is more expensive to compute than the other.
* tree-ssa-scopedtables.h (class const_or_copies): Make
record_const_or_copy_raw method private.
(class avail_exprs_stack): New method simplify_binary_operation.
* tree-ssa-scopedtables.c (avail_exprs_stack::lookup_avail_expr): Call
avail_exprs_stack::simplify_binary_operation as needed.
(avail_exprs_stack::simplify_binary_operation): New function.

PR tree-optimization/81741
PR tree-optimization/71947
* gcc.dg/tree-ssa/pr81741.c: New test.
* gcc.dg/tree-ssa/pr71947-7.c: New test.
* gcc.dg/tree-ssa/pr71947-8.c: New test.
* gcc.dg/tree-ssa/pr71947-9.c: New test.
* gcc.dg/tree-ssa/pr71941-1.c: Tweak expected output.
* gcc.dg/tree-ssa/pr71941-2.c: Tweak expected output.
* gcc.dg/tree-ssa/pr71941-3.c: Tweak expected output.
* gcc.dg/tree-ssa/20030922-2.c: xfail.

From-SVN: r251279

re PR lto/81925 (early lto debug link failure on aarch64_be)

2017-08-22  Richard Biener  <rguenther@suse.de>

PR lto/81925
* simple-object-elf.c (simple_object_elf_write_shdr): Adjust
type of sh_addralign and sh_entsize and properly write
sh_entsize as Elf_Addr.
(simple_object_elf_write_to_file): Read sh_entsize as Elf_Addr.

From-SVN: r251276

[PowerPC/RTEMS] Enable -mcmodel option

gcc/
* config.gcc (powerpc-*-rtems*): Add rs6000/linux64.opt.
* config/rs6000/rtems.h (ASM_PREFERRED_EH_DATA_FORMAT): New define.
(DOT_SYMBOLS): Likewise.
(MINIMAL_TOC_SECTION_ASM_OP): Likewise.
(RELOCATABLE_NEEDS_FIXUP): Likewise.
(RS6000_ABI_NAME): Likewise.
(TARGET_CMODEL): Likewise.
(TOC_SECTION_ASM_OP): Likewise.
(SET_CMODEL): New macro.
(SUBSUBTARGET_OVERRIDE_OPTIONS): Evaluate cmodel options.

From-SVN: r251275

tree-inline.c (remap_type_1): Change asserts on TYPE_SIZE[_UNIT] to allow for free-lang-data replacements...

2017-08-22  Richard Biener  <rguenther@suse.de>

* tree-inline.c (remap_type_1): Change asserts on TYPE_SIZE[_UNIT]
to allow for free-lang-data replacements similar to verify_type_variant.

From-SVN: r251274

re PR c++/80287 (C++ crash with __attribute((may_alias)))

2017-08-22  Yvan Roux  <yvan.roux@linaro.org>

        PR c++/80287
        * g++.dg/pr80287.C: New test.

From-SVN: r251268

[AArch64] Fix label mode

This patch fixes a case where we tried to force a VOIDmode label
into a DImode register, which led to invalid rtl that was previously
undiagnosed.

2017-08-22  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* config/aarch64/aarch64.md (casesi): Use DImode rather than
VOIDmode for the LABEL_REF.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251266

revert: asan.exp: Switch on *.cc tests.

2017-08-22  Richard Biener  <rguenther@suse.de>

Revert
2017-08-09  Slava Barinov  <v.barinov@samsung.com>

* g++.dg/asan/asan.exp: Switch on *.cc tests.

From-SVN: r251265

tree-cfg.c (gimple_split_edge): Avoid reallocating target PHI nodes.

2017-08-22  Richard Biener  <rguenther@suse.de>

* tree-cfg.c (gimple_split_edge): Avoid reallocating target
PHI nodes.

From-SVN: r251264

common.opt (feliminate-dwarf2-dups): Ignore.

2017-08-22  Richard Biener  <rguenther@suse.de>

* common.opt (feliminate-dwarf2-dups): Ignore.
* doc/invoke.texi (feliminate-dwarf2-dups): Remove documentation.
* dwarf2out.c (push_new_compile_unit, pop_compile_unit,
same_die_p_wrap, compute_section_prefix,
is_symbol_die, assign_symbol_names, break_out_includes): Remove.
(comdat_symbol_id, comdat_symbol_number): Likewise.
(cu_hash_table_entry, cu_hash_table_entry_hasher, cu_hash_type):
Likewise.
(check_duplicate_cu, record_comdat_symbol_number): Likewise.
(output_die): Mark unreachable path unreachable.
(dwarf2out_start_source_file): Do not create DW_TAG_GNU_BINCL.
(dwarf2out_end_source_file): Do not create DW_TAG_GNU_EINCL.
(dwarf2out_init): Remove code handling flag_eliminate_dwarf2_dups.
(dwarf2out_early_finish): Likewise.

* g++.dg/debug/dwarf2/dwarf2-1.C: Remove -feliminate-dwarf2-dups.
* g++.dg/debug/dwarf2/dwarf2-2.C: Likewise.
* g++.dg/debug/dwarf2/pr46123-2.C: Likewise.
* g++.dg/debug/dwarf2/typedef5.C: Likewise.
* gcc.dg/debug/dwarf2/dwarf2-3.c: Likewise.
* gcc.dg/debug/dwarf2/dwarf2-3.h: Likewise.
* gcc.dg/debug/dwarf2/dups-types.c: Remove.
* gcc.dg/debug/dwarf2/dups-types.h: Likewise.

From-SVN: r251262

* wide-int.h (hwi_with_prec::hwi_with_prec): Sign extend.

From-SVN: r251260

re PR target/81910 ([avr] ICE with "address" attribute on type)

gcc/
PR target/81910
* config/avr/avr.c (avr_handle_addr_attribute): Early return if
not VAR_P. Filter attribute warnings with OPT_Wattributes.
(avr_attribute_table) <io, io_low, address>: Initialize
.decl_required with true.

From-SVN: r251256

re PR fortran/81296 (derived type I/o problem)

2017-08-21  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

PR fortran/81296
* trans-io.c (get_dtio_proc): Add check for format label and set
formatted flag accordingly. Reorganize the code a little.

* gfortran.dg/dtio_12.f90: Update test.

From-SVN: r251254

Daily bump.

From-SVN: r251253

rs6000-cpus.def (-mvsx-scalar-float): Delete undocumented debugging options.

2017-08-21  Michael Meissner  <meissner@linux.vnet.ibm.com>

* config/rs6000/rs6000-cpus.def (-mvsx-scalar-float): Delete
undocumented debugging options.
(-mvsx-scalar-double): Likewise.
(-mallow-df-permute): Likewise.
(-mvectorize-builtins): Likewise.
* config/rs6000/rs6000.c (rs6000_init_hard_regno_mode_ok):
Likewise.
(rs6000_builtin_vectorized_function): Likewise.
(rs6000_builtin_md_vectorized_function): Likewise.
(rs6000_opt_vars): Likewise.

From-SVN: r251248

search.c (lookup_field_r): Remove obsolete code for type-named field in PoD.

* search.c (lookup_field_r): Remove obsolete code for type-named
field in PoD.

From-SVN: r251243

search.c (lookup_field_1): Assert TYPE is a class and VFIELD isn't special.

* search.c (lookup_field_1): Assert TYPE is a class and VFIELD
isn't special.
(lookup_field_fuzzy_info::fuzzy_lookup_fnfields): Delete.
(lookup_field_fuzzy_r): Adjust.

From-SVN: r251241

pr81899.C: Fix c++03.

* g++.dg/template/pr81899.C: Fix c++03.
* g++.dg/debug/debug9.C: Add -fno-reorder-blocks-and-partition"

From-SVN: r251240

C: use full locations within c_parser_expr_list's vec<location_t>

The previous patch uncovered a bug in how c_parser_expr_list builds the
vec<location_t>: it was only using the location of the first token
within each assignment-expression in the expr-list.

This shows up in e.g. this -Wformat warning, where only part of the
2nd param is underlined:

   printf("hello %i", (long)0);
                 ~^   ~
                 %li

This patch fixes c_parser_expr_list to use the full range of
each assignment-expression in the list for the vec<location_t>, so
that for the above we print:

   printf("hello %i", (long)0);
                 ~^   ~~~~~~~
                 %li

gcc/c/ChangeLog:
* c-parser.c (c_parser_expr_list): Use c_expr::get_location ()
rather than peeking the location of the first token.
* c-tree.h (c_expr::get_location): New method.

gcc/testsuite/ChangeLog:
* gcc.dg/format/diagnostic-ranges.c (test_mismatching_types):
Update expected result to show all of "(long)0" being underlined.
* gcc.dg/plugin/diagnostic-test-string-literals-1.c
(test_multitoken_macro): Update expected underlining.

From-SVN: r251239

c-family/c/c++: pass optional vec<location_t> to c-format.c

This patch passes along the vec<location_t> of argument locations
at a callsite from the C frontend to check_function_arguments and
from there to c-format.c, so that we can underline the pertinent
argument to mismatched format codes even for tree codes like decls
and constants which lack a location_t for their usage sites.

This takes e.g.:

    printf("hello %i %i %i ", foo, bar, baz);
                     ~^
                     %s

to:

    printf("hello %i %i %i ", foo, bar, baz);
                     ~^            ~~~
                     %s

which is useful for cases where there's more than one variadic argument.

gcc/c-family/ChangeLog:
* c-common.c (check_function_arguments): Add "arglogs" param; pass
it to check_function_format.
* c-common.h (check_function_arguments): Add vec<location_t> *
param.
(check_function_format): Likewise.
* c-format.c (struct format_check_context): Add field "arglocs".
(check_function_format): Add param "arglocs"; pass it to
check_format_info.
(check_format_info):  Add param "arglocs"; use it to initialize
new field of format_ctx.
(check_format_arg): Pass format_ctx->arglocs to new param of
check_format_info_main.
(class argument_parser): New field "arglocs".
(argument_parser::argument_parser): Add "arglocs_" param and use
it to initialize new field.
(argument_parser::check_argument_type): Pass new arglocs field to
check_format_types.
(check_format_info_main): Add param "arglocs", and use it when
constructing arg_parser.
(check_format_types): Add param "arglocs"; use it if non-NULL when
!EXPR_HAS_LOCATION (cur_param) to get at location information.

gcc/c/ChangeLog:
* c-typeck.c (build_function_call_vec): Pass arg_loc to call
to check_function_arguments.

gcc/cp/ChangeLog:
* call.c (build_over_call): Pass NULL for new parameter to
check_function_arguments.
* typeck.c (cp_build_function_call_vec): Likewise.

gcc/testsuite/ChangeLog:
* gcc.dg/format/diagnostic-ranges.c: Update expected results
to show underlining of all pertinent params.
* gcc.dg/format/pr72858.c: Likewise.

From-SVN: r251238

re PR target/46091 (missed optimization: x86 bt/btc/bts instructions)

PR target/46091
* config/i386/i386.md (*btsq_imm): Rename from *btsq.
(*btrq_imm): Rename from *btrq.
(*btcq_imm): Rename from *btcq.
(btsc): New code attribute.
(*<btsc><mode>): New insn pattern.
(*btr<mode>): Ditto.
(*<btsc><mode>_mask): New insn_and_split pattern.
(*btr<mode>_mask): Ditto.

testsuite/ChangeLog:

PR target/46091
* gcc.target/i386/pr46091-4.c: New test.
* gcc.target/i386/pr46091-4a.c: Ditto.
* gcc.target/i386/pr46091-5.c: Ditto.
* gcc.target/i386/pr46091-5a.c: Ditto.

From-SVN: r251235

PR libstdc++/81912 make std::__iterator_category constexpr

PR libstdc++/81912
* include/bits/stl_iterator_base_types.h (__iterator_category): Add
constexpr for C++11 and later.
* testsuite/24_iterators/container_access.cc: Add target selector.
* testsuite/24_iterators/range_access.cc: Fix clause number in
comment.
* testsuite/24_iterators/range_access_cpp14.cc: Likewise.
* testsuite/24_iterators/range_access_cpp17.cc: New.

From-SVN: r251234

Simplify pad_below implementation

This patch simplifies the alignment calculations in pad_below.
The first arm of the "if" was:

- taking GET_MODE_BITSIZE (always equal to GET_MODE_SIZE * BITS_PER_UNIT),
- rounding up to the next multiple of PARM_BOUNDARY
- converting bits to bytes and
- subtracting the GET_MODE_SIZE

so was in effect calculating the number of bytes needed to round
GET_MODE_SIZE up to (PARM_BOUNDARY / BITS_PER_UNIT).  That can be
done more directly as -size & (align - 1), which is easier to
convert to variable-sized modes.

2017-08-21  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* function.c (pad_below): Simplify padding calculation.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251233

Remove the frame size argument from function_prologue/epilogue

Later patches will add support for frame sizes that are a run-time
invariant but not a compile-time constant.  This then raised the
question of whether the frame size argument to the function_prologue/
epilogue hooks should be updated accordingly.

It turned out that only two targets actually used this argument, and
even they got other frame-related information from the cached machine
structure.  This patch therefore removes the argument and makes the two
targets use get_frame_size () instead.

2017-08-21  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* target.def (function_prologue): Remove frame size argument.
(function_epilogue): Likewise.
* doc/tm.texi: Regenerate.
* final.c (final_start_function): Update call to function_prologue.
(final_end_function): Update call to function_epilogue.
(default_function_pro_epilogue): Remove frame size argument.
* output.h (default_function_pro_epilogue): Likewise.
* config/arm/arm.c (arm_output_function_epilogue): Likewise.
(arm_output_function_prologue): Likewise.
* config/frv/frv.c (frv_function_prologue): Likewise.
(frv_function_epilogue): Likewise.
* config/i386/i386.c (ix86_output_function_epilogue): Likewise.
* config/ia64/ia64.c (ia64_output_function_prologue): Likewise.
(ia64_output_function_epilogue): Likewise.
* config/m32r/m32r.c (m32r_output_function_prologue): Likewise.
(m32r_output_function_epilogue): Likewise.
* config/microblaze/microblaze.c (microblaze_function_prologue)
(microblaze_function_epilogue): Likewise.
* config/mips/mips.c (mips_output_function_prologue): Likewise.
(mips_output_function_epilogue): Likewise.
* config/mmix/mmix.c (mmix_target_asm_function_prologue): Likewise.
(mmix_target_asm_function_epilogue): Likewise.
* config/msp430/msp430.c (msp430_start_function): Likewise.
* config/nds32/nds32.c (nds32_asm_function_prologue): Likewise.
(nds32_asm_function_epilogue): Likewise.
* config/nios2/nios2.c (nios2_asm_function_prologue): Likewise.
* config/pa/pa.c (pa_output_function_prologue): Likewise.
(pa_output_function_epilogue): Likewise.
* config/powerpcspe/powerpcspe.c (rs6000_output_function_prologue)
(rs6000_output_function_epilogue): Likewise.
* config/rl78/rl78.c (rl78_start_function): Likewise.
* config/rs6000/rs6000.c (rs6000_output_function_prologue): Likewise.
(rs6000_output_function_epilogue): Likewise.
* config/rx/rx.c (rx_output_function_prologue): Likewise.
* config/sh/sh.c (sh_output_function_epilogue): Likewise.
* config/sparc/sparc.c (sparc_asm_function_prologue): Likewise.
(sparc_asm_function_epilogue): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251232

Add a type_has_mode_precision_p helper function

...to replace instances of:

    TYPE_PRECISION (t) == GET_MODE_PRECISION (TYPE_MODE (t))

These conditions would need to be rewritten with variable-sized
modes anyway.

2017-08-21  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
* tree.h (type_has_mode_precision_p): New function.
* convert.c (convert_to_integer_1): Use it.
* expr.c (expand_expr_real_2): Likewise.
(expand_expr_real_1): Likewise.
* fold-const.c (fold_single_bit_test_into_sign_test): Likewise.
* match.pd: Likewise.
* tree-ssa-forwprop.c (simplify_rotate): Likewise.
* tree-ssa-math-opts.c (convert_mult_to_fma): Likewise.
* tree-tailcall.c (process_assignment): Likewise.
* tree-vect-loop.c (vectorizable_reduction): Likewise.
* tree-vect-patterns.c (vect_recog_vector_vector_shift_pattern)
(vect_recog_mult_pattern, vect_recog_divmod_pattern): Likewise.
* tree-vect-stmts.c (vectorizable_conversion): Likewise.
(vectorizable_assignment): Likewise.
(vectorizable_shift): Likewise.
(vectorizable_operation): Likewise.
* tree-vrp.c (register_edge_assert_for_2): Likewise.

From-SVN: r251231

This patch simplifies pow (C, x) into exp (x * C1) if C > 0, C1 = log (C).

Do this only for fast-math as accuracy is reduced.  This is much faster
since pow is more complex than exp.

    gcc/
* match.pd: Add pow (C, x) simplification

From-SVN: r251230

* de.po: Update.

From-SVN: r251228

re PR c++/81899 (ICE: Segmentation fault)

PR c++/81899
* pt.c (instantiate_class_template_1):
BOUND_TEMPLATE_TEMPLATE_PARM is never friend-injected.

PR c++/81899
* g++.dg/template/pr81899.C: New.

From-SVN: r251227

re PR tree-optimization/81900 (GCC trunk miscompiles Perl / __sigsetjmp issue)

2017-08-21  Richard Biener  <rguenther@suse.de>

PR tree-optimization/81900
* tree-ssa-pre.c (compute_antic_aux): Properly compute changed
for blocks with abnormal predecessors.
(compute_antic): Do not set visited flag prematurely.

* gcc.dg/torture/pr81900.c: New testcase.

From-SVN: r251226

re PR target/79883 (avr i18n: untranslated "interrupt" or "signal")

PR target/79883
* config/avr/avr.c (avr_set_current_function): Typo in diagnostic.

From-SVN: r251223

Tabify 2017-08-21  Richard Biener  <rguenther@suse.de> entry

From-SVN: r251222

Move vector_type_mode to tree.c

...so that it's possible to use TYPE_MODE in tree.h.

2017-08-21  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
* stor-layout.h (vector_type_mode): Move to...
* tree.h (vector_type_mode): ...here.
* stor-layout.c (vector_type_mode): Move to...
* tree.c (vector_type_mode): ...here.  Include rtl.h and regs.h.

From-SVN: r251221

re PR go/78628 (GO fails to build a translation unit decl)

2017-08-21  Richard Biener  <rguenther@suse.de>

include/
* simple-object.h (simple_object_copy_lto_debug_sections): New
function.

libiberty/
* simple-object-common.h (struct simple_object_functions): Add
copy_lto_debug_sections hook.
* simple-object.c: Include fcntl.h.
(handle_lto_debug_sections): New helper function.
(simple_object_copy_lto_debug_sections): New function copying
early LTO debug sections to regular debug sections in a new file.
(simple_object_start_write): Handle NULL segment_name.
* simple-object-coff.c (simple_object_coff_functions): Adjust
for not implemented copy_lto_debug_sections hook.
* simple-object-mach-o.c (simple_object_mach_o_functions): Likewise.
* simple-object-xcoff.c (simple_object_xcoff_functions): Likewise.
* simple-object-elf.c (SHT_NULL, SHT_SYMTAB, SHT_RELA, SHT_REL,
SHT_GROUP): Add various sectopn header types.
(SHF_EXCLUDE): Add flag.
(Elf32_External_Sym, Elf64_External_Sym): Add symbol struct.
(ELF_ST_BIND, ELF_ST_TYPE, ELF_ST_INFO): Add accessors.
(STT_OBJECT, STT_FUNC, STT_TLS, STT_GNU_IFUNC): Add Symbol types.
(STV_DEFAULT): Add symbol visibility.
(SHN_COMMON): Add special section index name.
(struct simple_object_elf_write): New.
(simple_object_elf_start_write): Adjust for new private data.
(simple_object_elf_write_shdr): Pass in values for all fields
we write.
(simple_object_elf_write_to_file): Adjust.  Copy from recorded
section headers if requested.
(simple_object_elf_release_write): Release private data.
(simple_object_elf_copy_lto_debug_sections): Copy and rename sections
as denoted by PFN and all their dependences, symbols and relocations
to the empty destination file.
(simple_object_elf_functions): Adjust for copy_lto_debug_sections hook.

        gcc/
        * debug.h (struct gcc_debug_hooks): Add die_ref_for_decl and
        register_external_die hooks.
        (debug_false_tree_charstarstar_uhwistar): Declare.
        (debug_nothing_tree_charstar_uhwi): Likewise.
        * debug.c (do_nothing_debug_hooks): Adjust.
        (debug_false_tree_charstarstar_uhwistar): New do nothing.
        (debug_nothing_tree_charstar_uhwi): Likewise.
        * dbxout.c (dbx_debug_hooks): Adjust.
        (xcoff_debug_hooks): Likewise.
        * sdbout.c (sdb_debug_hooks): Likewise.
        * vmsdbgout.c (vmsdbg_debug_hooks): Likewise.
        * dwarf2out.c (macinfo_label_base): New global.
(dwarf2out_register_external_die): New function for the
register_external_die hook.
        (dwarf2out_die_ref_for_decl): Likewise for die_ref_for_decl.
        (dwarf2_debug_hooks): Use them.
        (dwarf2_lineno_debug_hooks): Adjust.
        (struct die_struct): Add with_offset flag.
        (DEBUG_LTO_DWO_INFO_SECTION, DEBUG_LTO_INFO_SECTION,
        DEBUG_LTO_DWO_ABBREV_SECTION, DEBUG_LTO_ABBREV_SECTION,
        DEBUG_LTO_DWO_MACINFO_SECTION, DEBUG_LTO_MACINFO_SECTION,
        DEBUG_LTO_DWO_MACRO_SECTION, DEBUG_LTO_MACRO_SECTION,
        DEBUG_LTO_LINE_SECTION, DEBUG_LTO_DWO_STR_OFFSETS_SECTION,
        DEBUG_LTO_STR_DWO_SECTION, DEBUG_STR_LTO_SECTION): New macros
        defining section names for the early LTO debug variants.
(reset_indirect_string): New helper.
        (add_AT_external_die_ref): Helper for dwarf2out_register_external_die.
        (print_dw_val): Add support for offsetted symbol references.
(get_ultimate_context): Split out from is_cxx.
(is_cxx): Use get_ultimate_context.
(is_fortran): Add decl overload.
        (compute_comp_unit_symbol): Split out worker from
compute_section_prefix.
        (compute_section_prefix): Call compute_comp_unit_symbol and
set comdat_type_p here.
        (output_die): Skip DIE symbol output for the LTO added one.
        Handle DIE symbol references with offset.
        (output_comp_unit): Guard section name mangling properly.
        For LTO debug sections emit a symbol at the section beginning
        which we use to refer to its DIEs.
        (add_abstract_origin_attribute): For DIEs registered via
        dwarf2out_register_external_die directly refer to the early
        DIE rather than indirectly through the shadow one we created.
Remove obsolete call to dwarf2out_abstract_function for
non-function/block origins.
        (gen_array_type_die): When generating early LTO debug do
        not emit DW_AT_string_length.
        (gen_formal_parameter_die): Do not re-create DIEs for PARM_DECLs
        late when in LTO.  As suggested place a gcc_unreachable for
the DECL_ABSTRACT_P case.
        (gen_subprogram_die): Avoid another specification DIE
        for early built declarations/definitions for the late LTO case.
        (gen_variable_die): Add type references for late duplicated VLA dies
        when in late LTO.
        (gen_inlined_subroutine_die): Do not call dwarf2out_abstract_function,
        we have the abstract instance already.
        (process_scope_var): Adjust decl DIE contexts in LTO which
        first puts them in limbo.
        (gen_decl_die): Do not generate type DIEs late apart from
        types for VLAs or for decls we do not yet have a DIE.  Do not
call dwarf2out_abstract_function late.
        (dwarf2out_early_global_decl): Make sure to create DIEs
        for abstract instances of a decl first.
        (dwarf2out_late_global_decl): Adjust comment.
        (output_macinfo_op): With multiple macro sections use
macinfo_label_base to distinguish labels.
        (output_macinfo): Likewise.  Update macinfo_label_base.
Pass in the line info label.
(note_variable_value_in_expr): When generating LTO resolve
all variable values here by generating DIEs as needed.
        (init_sections_and_labels): Add early LTO debug flag parameter
        and generate different sections and names if set.  Add generation
        counter for the labels so we can have multiple of them.
        (reset_dies): Helper to allow DIEs to be output multiple times.
        (dwarf2out_finish): When outputting DIEs to the fat part of an
LTO object first reset DIEs.
        (dwarf2out_early_finish): Output early DIEs when generating LTO.
(modified_type_die): Check for decl_ultimate_origin being self
before recursing.
(gen_type_die_with_usage): Likewise.
(gen_typedef_die): Allow decl_ultimate_origin being self.
        (set_decl_abstract_flags): Remove.
        (set_block_abstract_flags): Likewise.
        (dwarf2out_abstract_function): Treat the early generated DIEs
        as the abstract copy and only add DW_AT_inline and
        DW_AT_artificial here and call set_decl_origin_self.
If the DIE has an abstract origin don't do anything.
* tree.c (free_lang_data): Build a dummy TRANSLATION_UNIT_DECL
if we have none yet (Go fails to build one, PR78628).
(variably_modified_type_p): Prevent endless recursion for Ada
cyclic pointer types.
        * lto-streamer-in.c: Include debug.h.
        (dref_queue): New global.
        (lto_read_tree_1): Stream in DIE references.
        (lto_input_tree): Register DIE references.
(input_function): Stream DECL_DEBUG_ARGS.
        * lto-streamer-out.c: Include debug.h.
        (lto_write_tree_1): Output DIE references.
        (DFS::DFS_write_tree_body): Follow DECL_ABSTRACT_ORIGIN.
Force a TRANSLATION_UNIT_DECL DECL_CONTEXT for file-scope decls.
(output_function): Stream DECL_DEBUG_ARGS.
        * tree-streamer-in.c (lto_input_ts_decl_common_tree_pointers):
        Stream DECL_ABSTRACT_ORIGIN.
        * tree-streamer-out.c (write_ts_decl_common_tree_pointers): Likewise.
(write_ts_decl_minimal_tree_pointers): Force a TRANSLATION_UNIT_DECL
DECL_CONTEXT for file-scope decls.
        * lto-streamer.h (struct dref_entry): Declare.
        (dref_queue): Likewise.
* cfgexpand.c (pass_expand::execute): Do not call the
outlining_inline_function hook here.
        * lto-wrapper.c (debug_obj): New global.
        (tool_cleanup): Unlink it if required.
        (debug_objcopy): New function.
        (run_gcc): Handle early debug sections in the IL files by
        extracting them to separate files, partially linkin them and
        feeding the result back as result to the linker.

        * config/darwin.h (DEBUG_LTO_INFO_SECTION, DEBUG_LTO_ABBREV_SECTION,
        DEBUG_LTO_MACINFO_SECTION, DEBUG_LTO_LINE_SECTION,
        DEBUG_STR_LTO_SECTION, DEBUG_LTO_MACRO_SECTION): Put early debug
        sections into a separate segment.
        * config/darwin.c (darwin_asm_named_section): Handle __GNU_DWARF_LTO
        segments.
        (darwin_asm_dwarf_section): Likewise.
        (darwin_asm_output_dwarf_offset): Likewise.

* config/i386/i386.c (make_resolver_func): Set DECL_IGNORED_P.

        lto/
        * lto.c (unify_scc): Truncate DIE reference queue for dropped SCCs.
        (lto_read_decls): Process TRANSLATION_UNIT_DECLs.  Remove
        TYPE_DECL debug processing, register DIE references from
        prevailing SCCs with the debug machinery.
        (lto_section_with_id): Handle LTO debug sections.

libstdc++/
* testsuite/libstdc++-prettyprinters/prettyprinters.exp: Run all
tests with -flto as well if supported.

        testsuite/
* c-c++-common/asan/global-overflow-1.c: Adjust diagnostic location
regex to handle the LTO case.
* c-c++-common/asan/heap-overflow-1.c: Likewise.
* c-c++-common/asan/misalign-1.c: Likewise.
* c-c++-common/asan/misalign-2.c: Likewise.
* c-c++-common/asan/null-deref-1.c: Likewise.
* c-c++-common/asan/stack-overflow-1.c: Likewise.
* c-c++-common/asan/strncpy-overflow-1.c: Likewise.
* c-c++-common/asan/use-after-free-1.c: Likewise.
* c-c++-common/asan/alloca_big_alignment.c: Likewise.
* c-c++-common/asan/alloca_detect_custom_size.c: Likewise.
* c-c++-common/asan/alloca_overflow_partial.c: Likewise.
* c-c++-common/asan/alloca_overflow_right.c: Likewise.
* c-c++-common/asan/alloca_underflow_left.c: Likewise.
* g++.dg/asan/large-func-test-1.C: Likewise.
* gfortran.dg/save_6.f90: Add -flto -g variant of save_5.f90.

From-SVN: r251220

Pass rtx and index to read-md.c iterator routines

The read-md.c iterator callbacks previously used a void * to record the
position at which the iterator value should be installed.  This doesn't
scale easily to the SUBREG_BYTE representation used by a later patch,
so this patch replaces the void * with both an rtx and an operand
number.  The operand number is ignored for modes and codes.

2017-08-21  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* read-md.h (md_reader::record_potential_iterator_use): Replace
pointer argument with an rtx and an index.
* read-rtl.c (iterator_group::apply_iterator): Likewise.
(apply_mode_iterator): Likewise.
(apply_code_iterator): Likewise.
(apply_int_iterator): Likewise.
(apply_subst_iterator): Likewise.
(record_iterator_use): Likewise.
(record_attribute_use): Likewise.
(md_reader::record_potential_iterator_use): Likewise.  Update calls
to record_iterator_use and apply_iterator.
(iterator_use): Replace ptr with x and index.
(attribute_use): Likewise.
(apply_attribute_uses): Update calls to apply_iterator.
(apply_iterators): Likewise.  Update initialization of iterator_use.
(rtx_reader::read_rtx_code): Update calls to record_iterator_use
and record_potential_iterator_use.
(rtx_reader::read_rtx_operand): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251219

Fix bogus CONST_WIDE_INT hash

The CONST_WIDE_INT case in const_rtx_hash_1 started the hash
with the precision of the mode, but the mode is always VOIDmode.

2017-08-21  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* varasm.c (const_rtx_hash_1): Don't hash in the mode of a
CONST_WIDE_INT.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251218

re PR tree-optimization/81884 (Invalid code generation with zero size arrays or flexible array members)

2017-08-21  Richard Biener  <rguenther@suse.de>

PR middle-end/81884
* tree-ssa-alias.c (stmt_kills_ref_p): Handle array accesses
at struct end conservatively when comparing common bases.

* g++.dg/torture/pr81884.C: New testcase.

From-SVN: r251217

tree-ssa-loop-im.c (struct lim_aux_data): Add ref index member.

2017-08-21  Richard Biener  <rguenther@suse.de>

* tree-ssa-loop-im.c (struct lim_aux_data): Add ref index member.
(mem_ref_in_stmt): Remove.
(determine_max_movement): Use ref index to get at the reference.
(invariantness_dom_walker::before_dom_children): Deal with
lim data already initialized.
(gather_mem_refs_stmt): Initialize lim data and record ref index.

From-SVN: r251216

Daily bump.

From-SVN: r251215

re PR c/81854 (weak alias of an incompatible symbol accepted)

libstdc++/ChangeLog:

PR c/81854
* src/c++98/compatibility.cc (_GLIBCXX_3_4_SYMVER): Declare alias
target as a C++ function with no prototype.
(_GLIBCXX_3_4_5_SYMVER): Ditto.

From-SVN: r251211

Fix typo.

From-SVN: r251210

re PR testsuite/81056 (FAIL: 17_intro/names.cc (test for excess errors))

PR testsuite/81056
* testsuite/17_intro/names.cc: Undef 'd' and 'r' on __hpux__

From-SVN: r251208

re PR ipa/77732 (FAIL: gcc.dg/ipa/ipcp-cstagg-7.c scan-ipa-dump-times cp "Discovered an indirect  call to a known target" 3)

PR ipa/77732
* gcc.dg/ipa/ipcp-cstagg-7.c: Xfail on 32-bit hppa.

From-SVN: r251206

Daily bump.

From-SVN: r251205

i386.h (OPTION_MASK_ISA_ROUND): Remove.

* config/i386/i386.h (OPTION_MASK_ISA_ROUND): Remove.
(TARGET_ISA_ROUND): Ditto.
(TARGET_ROUND): Ditto.
* config/i386/i386.c: Substitute TARGET_ROUND with TARGET_SSE4_1.
* config/i386/i386.md: Ditto.
* config/i386/sse.md: Ditto.
* config/i386/i386-builtin.def: Substitute OPTION_MASK_ISA_ROUND
with OPTION_MASK_ISA_SSE4_1.

From-SVN: r251201

re PR target/81894 (Typo in x86 built-in function list)

PR target/81894
* doc/extend.texi (x86 Built-in Functions): Correct the name of
__builtin_ia32_lzcnt_u16.

From-SVN: r251197

Daily bump.

From-SVN: r251196

jit: fix segfault with autovectorization (PR tree-optimization/46805)

libgccjit ran into its own version of PR tree-optimization/46805 (seen
with the Go frontend); this patch fixes it in the same way.

gcc/jit/ChangeLog:
PR tree-optimization/46805
* dummy-frontend.c (jit_langhook_parse_file): Handle vector types.

gcc/testsuite/ChangeLog:
PR tree-optimization/46805
* jit.dg/all-non-failing-tests.h: Add test-autovectorize.c.
* jit.dg/test-autovectorize.c: New test case.

From-SVN: r251192

jit: make simpler reproducers

The C reproducers generated by gcc_jit_context_dump_reproducer_to_file
contain numerous pointer values (from %p) to ensure uniqueness of the
identifiers, but this makes them less readable than they could be.

This patch updates reproducer::make_identifier so that the pointer
is only added if it's necessary for uniqueness.

gcc/jit/ChangeLog:
* jit-recording.c (class gcc::jit::reproducer): Rename field
"m_identifiers" to "m_map_memento_to_identifier".  Add field
"m_set_identifiers" and struct hash_traits for it.
(gcc::jit::reproducer::reproducer): Update for above.
(convert_to_identifier): New function.
(gcc::jit::reproducer::ensure_identifier_is_unique): New method.
(gcc::jit::reproducer::make_identifier): Avoid appending the %p
unless necessary for uniqueness.  Update for field renaming.
(gcc::jit::reproducer::get_identifier): Update for field renaming.

From-SVN: r251191

re PR target/80210 (ICE in in extract_insn, at recog.c:2311 on ppc64 for with __builtin_pow)

gcc/
PR target/80210
* config/rs6000/rs6000.c (rs6000_activate_target_options): New function.
(rs6000_set_current_function): Rewrite function to use it.

gcc/testsuite/
PR target/80210
* gcc.target/powerpc/pr80210.c: New test.

From-SVN: r251190

re PR go/81893 (compilation error in libgo starting with r251127)

PR go/81893
    runtime: only use PPC GNU/Linux register code on little endian

    Reportedly the current code builds on little endian but not big endian.

    Fixes https://gcc.gnu.org/PR81893.

    Reviewed-on: https://go-review.googlesource.com/57110

From-SVN: r251188

Simplify allocator usage in unordered containers

* include/bits/hashtable_policy.h (_ReuseOrAllocNode): Remove
__value_alloc_type and __value_alloc_traits typedefs.
(_ReuseOrAllocNode::operator()): Call construct and destroy on the
node allocator.
(_Hashtable_alloc): Simplify __value_alloc_traits typedef.
(_Hashtable_alloc<_NodeAlloc>::_M_allocate_node(_Args&&...)): Call
construct on the node allocator.
(_Hashtable_alloc<_NodeAlloc>::_M_deallocate_node(__node_type*)): Call
destroy on the node allocator.

From-SVN: r251187

C++: fix ordering of missing std #include suggestion (PR c++/81514)

gcc/cp/ChangeLog:
PR c++/81514
* name-lookup.c (maybe_suggest_missing_header): Convert return
type from void to bool; return true iff a suggestion was offered.
(suggest_alternative_in_explicit_scope): Move call to
maybe_suggest_missing_header to before use of best_match, and
return true if the former offers a suggestion.

gcc/testsuite/ChangeLog:
PR c++/81514
* g++.dg/lookup/empty.h: New file.
* g++.dg/lookup/missing-std-include-2.C: Replace include of
stdio.h with empty.h and a declaration of a "std::sprintf" not based
on a built-in.

From-SVN: r251186

PR libstdc++/81891 fix double-free in hashtable constructor

PR libstdc++/81891
* include/bits/hashtable.h (_Hashtable(_InputIterator, _InputIterator,
size_type, const _H1&, const _H2&, const _Hash&, const _Equal&,
const _ExtractKey&, const allocator_type&)): Let destructor do clean
up if an exception is thrown.
* testsuite/23_containers/unordered_map/cons/81891.cc: New.

From-SVN: r251185

misc/cgo/test: make cgo tests run on AIX

    Reviewed-on: https://go-review.googlesource.com/56910

From-SVN: r251182

c-parser.c (c_parser_postfix_expression): Remove unused code.

* c-parser.c (c_parser_postfix_expression): Remove unused code.  Update
commentary.

From-SVN: r251181