This improves the assembler output (for -dp and -fverbose-asm) in
several ways.  It always prints the insn_cost.  It does not print
"[length = NN]" but "[c=NN l=NN]", to save space.  It does not add one
to the instruction alternative number (everything else starts counting
those at 0, too).  And finally, it tries to keep things lined up in
columns a bit better.


	* final.c (output_asm_name): Print insn_cost.  Shorten output.  Print
	which_alternative instead of which_alternative + 1.
	(output_asm_insn): Print an extra tab if the template is short.

From-SVN: r255348

    
    The functions cgoCheckPointer and cgoCheckResult are called by code
    generated by cgo. That means that we need to export them using
    go:linkname, as otherwise they are local symbols. The cgo code
    currently uses weak references to only call the symbols if they are
    defined, which is why it has been working--the cgo code has not been
    doing any checks.
    
    Reviewed-on: https://go-review.googlesource.com/80295

From-SVN: r255347

    
    GCC has started emitting "control reaches end of non-void function"
    warnings. Avoid them for Go by 1) marking the builtin function panic
    and the compiler-generated function __go_runtime_error as not
    returning and 2) adding a default case to the switch used for select
    statements that simply calls __builtin_unreachable.
    
    Fixes golang/go#22767
    
    Reviewed-on: https://go-review.googlesource.com/80416

	* go-gcc.cc (Gcc_backend::Gcc_backend): Define
	__builtin_unreachable.
	(Gcc_backend::function): Add does_not_return parameter.

From-SVN: r255346

	gcc/
	* common.opt (use_gnu_debug_info_extensions): Delete DWARF_DEBUG from
	comment.
	* config/vx-common.h (DWARF_DEBUGGING_INFO): Delete undef.
	* doc/tm.texi.in (PREFERRED_DEBUGGING_TYPE): Delete DWARF_DEBUG
	reference.
	* doc/tm.texi: Regenerate.

From-SVN: r255345

From-SVN: r255344

[gcc]
2017-12-01  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/81959
	* config/rs6000/rs6000.c (rs6000_address_for_fpconvert): Check for
	whether we can allocate pseudos before trying to fix an address.
	* config/rs6000/rs6000.md (float_<mode>si2_hw): Make sure the
	memory address is indexed or indirect.
	(floatuns_<mode>si2_hw2): Likewise.

[gcct/testsuite]
2017-12-01  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/81959
	* gcc.target/powerpc/pr81959.c: New test.

From-SVN: r255341

    
    Add a new control variable to the Gogo class that stores the size
    threshold for nil checks. This value can be used to control the
    policy for deciding when a given deference operation needs a check and
    when it does not. A size threshold of -1 means that every potentially
    faulting dereference needs an explicit check (and branch to error
    call). A size threshold of K (where K > 0) means that if the size of
    the object being dereferenced is >= K, then we need a check.
    
    Reviewed-on: https://go-review.googlesource.com/80996

	* go-c.h (go_create_gogo_args): Add nil_check_size_threshold
	field.
	* go-lang.c (go_langhook_init): Set nil_check_size_threshold.

From-SVN: r255340

From-SVN: r255339

	* name-lookup.c (get_std_name_hint): Add <complex>.
	* parser.c (cp_parser_diagnose_invalid_type_name): Call
	suggest_alternative_in_explicit_scope.
	(cp_parser_namespace_name): Likewise.

From-SVN: r255336

libcpp/
	* expr.c (interpret_float_suffix): Ignore 'i' in C++14 and up.
	(interpret_int_suffix): Likewise.
gcc/cp/
	* parser.c (cp_parser_userdef_numeric_literal): Be helpful about
	'i' in C++14 and up.

From-SVN: r255335

From-SVN: r255334

Fix address printing for ILP32.  The md file uses 'a' in assembler
templates for symbolic addresses in adrp/add, which end up calling
aarch64_print_operand_address.  However in ILP32 these are not valid
memory addresses (being ptr_mode rather than Pmode), so the assert
triggers.  Since it is incorrect to use symbols in memory addresses
(besides literal pool accesses), change the 'a' to 'c' in the md file.

Skip one failing test in ILP32 which combines the 'p' modifier with the 'a'
assembler template to fake a memory reference.

    gcc/
	* config/aarch64/aarch64.md (call_insn): Use %c rather than %a.
	(call_value_insn): Likewise.
	(sibcall_insn): Likewise.
	(sibcall_value_insn): Likewise.
	(movsi_aarch64): Likewise.
	(movdi_aarch64): Likewise.
	(add_losym_): Likewise.
	(ldr_got_small_): Likewise.
	(ldr_got_small_sidi): Likewise.
	(ldr_got_small_28k_): Likewise.
	(ldr_got_small_28k_sidi): Likewise.
	* config/aarch64/aarch64.c (aarch64_print_address_internal):
	Move output_addr_const to symbolic case. Add error check.
    testsuite/
	* gcc.dg/asm-4.c: Skip on AArch64 with ILP32 as test is incorrect.

From-SVN: r255333

From-SVN: r255332

re PR fortran/83224 (creating character array from elements shorter than declared does not pad with whitespace properly and aborts)

2017-12-01  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/83224
	* frontend-passes.c (create_var): Also handle
	character arrays, handling deferred lenghts.

2017-12-01  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/83224
	* gfortran.dg/dependency_51.f90: New test.

From-SVN: r255331

	* include/experimental/string_view (basic_string_view::_S_compare):
	Use value-init so narrowing conversions are not ill-formed.
	* include/std/string_view (basic_string_view::_S_compare): Likewise.

From-SVN: r255321

	* include/bits/basic_string.h (operator""s): Add pragmas to disable
	-Wliteral-suffix warnings.
	* include/experimental/string_view (operator""sv): Likewise.
	* include/std/chrono (operator""h, operator""min, operator""s)
	(operator""ms, operator""us, operator""ns): Likewise.
	* include/std/complex (operator""if, operator""i, operator""il):
	Likewise.
	* include/std/string_view (operator""sv): Likewise.
	* testsuite/20_util/duration/literals/range.cc: Adjust dg-error.

From-SVN: r255320

Certain lengths used in an MVC instruction might disable operand
forwarding.  Split MVCs into up to 2 forwardable ones if possible.

gcc/ChangeLog:

2017-12-01  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	* config/s390/predicates.md (plus16_Q_operand): New predicate.
	* config/s390/s390.md: Disable MVC merging peephole if it would
	disable operand forwarding.
	(new peephole2): Split MVCs if it would turn them into up to 2
	forwardable MVCs.

From-SVN: r255319

	* include/bits/locale_facets_nonio.tcc (money_get::_M_extract): Add
	fallthrough comment.

From-SVN: r255318

	* include/bits/node_handle.h (_Node_handle_common::operator=)
	(_Node_handle_common::_M_swap): Add braces around debug assertions.

From-SVN: r255317

	* include/ext/ropeimpl.h (rope::_S_dump): Use const char*.

From-SVN: r255316

	* libsupc++/nested_exception.h (__throw_with_nested_impl): Add
	noreturn attribute.

From-SVN: r255315

	* include/bits/regex_executor.tcc (_Executor::_M_rep_once_more):
	Remove semi-colon after function body.
	* include/bits/uniform_int_dist.h (_Power_of_2): Likewise.

From-SVN: r255314

	* include/tr1/modified_bessel_func.tcc (__airy): Use value-init not
	list-init.

From-SVN: r255313

	* include/std/type_traits (integral_constant): Make member functions
	noexcept (LWG 2346).
	* include/std/utility (integer_sequence): Likewise.

From-SVN: r255312

2017-12-01  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/82605
	* resolve.c (get_pdt_constructor): Initialize 'cons' to NULL.
	(resolve_pdt): Correct typo in prior comment. Emit an error if
	any parameters are deferred and the object is neither pointer
	nor allocatable.

	PR fortran/82606
	* decl.c (gfc_get_pdt_instance): Continue if the parameter sym
	is not present or has no name. Select the parameter by name
	of component, rather than component order. Remove all the other
	manipulations of 'tail' when building the pdt instance.
	(gfc_match_formal_arglist): Emit and error if a star is picked
	up in a PDT decl parameter list.

	PR fortran/82622
	* trans-array.c (set_loop_bounds): If a GFC_SS_COMPONENT has an
	info->end, use it rather than falling through to
	gcc_unreachable.
	(structure_alloc_comps): Check that param->name is non-null
	before comparing with the component name.
	* trans-decl.c (gfc_get_symbol_decl): Do not use the static
	initializer for PDT symbols.
	(gfc_init_default_dt): Do nothing for PDT symbols.
	* trans-io.c (transfer_array_component): Parameterized array
	components use the descriptor ubound since the shape is not
	available.

	PR fortran/82719
	PR fortran/82720
	* trans-expr.c (gfc_conv_component_ref): Do not use the charlen
	backend_decl of pdt strings. Use the hidden component instead.
	* trans-io.c (transfer_expr): Do not do IO on "hidden" string
	lengths. Use the hidden string length for pdt string transfers
	by adding it to the se structure. When finished nullify the
	se string length.

	PR fortran/82866
	* decl.c (gfc_match_formal_arglist): If a name is not found or
	star is found, while reading a type parameter list, emit an
	immediate error.
	(gfc_match_derived_decl): On reading a PDT parameter list, on
	failure to match call gfc_error_recovery.

	PR fortran/82978
	* decl.c (build_struct): Character kind defaults to 1, so use
	kind_expr whatever is the set value.
	(gfc_get_pdt_instance): Ditto.
	* trans-array.c (structure_alloc_comps): Copy the expression
	for the PDT string length before parameter substitution. Use
	this expression for evaluation and free it after use.

2017-12-01  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/82605
	* gfortran.dg/pdt_4.f03 : Incorporate the new error.

	PR fortran/82606
	* gfortran.dg/pdt_19.f03 : New test.
	* gfortran.dg/pdt_21.f03 : New test.

	PR fortran/82622
	* gfortran.dg/pdt_20.f03 : New test.
	* gfortran.dg/pdt_22.f03 : New test.

	PR fortran/82719
	PR fortran/82720
	* gfortran.dg/pdt_23.f03 : New test.

	PR fortran/82866
	* gfortran.dg/pdt_24.f03 : New test.

	PR fortran/82978
	* gfortran.dg/pdt_10.f03 : Correct for error in coding the for
	kind 4 component and change the kind check appropriately.
	* gfortran.dg/pdt_25.f03 : New test.

From-SVN: r255311

	libgomp/
	* testsuite/libgomp.oacc-c-c++-common/data-2-lib.c: Add missing
	call to acc_wait (1).

From-SVN: r255308

re PR tree-optimization/83232 (fma3d spec2000 regression on zen with -Ofast (generic tuning) after r255268 by missed SLP oppurtunity)

2017-12-01  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/83232
	* tree-vect-data-refs.c (vect_analyze_data_ref_accesses): Fix
	detection of same access. Instead of breaking the group here
	do not consider the duplicate.  Add comment explaining real fix.

	* gfortran.dg/vect/pr83232.f90: New testcase.

From-SVN: r255307

	* doc/md.texi (Insn Splitting): Fix "central flowgraph" typo.

From-SVN: r255305

gcc/ada
	* libgnarl/s-osinte__rtems.ads (pthread_cond_t): Use correct size and
	alignment.
	(pthread_mutex_t): Likewise.
	(pthread_rwlock_t): Likewise.

From-SVN: r255302

ChangeLog entry are as follow:

*** gcc/ChangeLog ***

2017-12-01  Sudakshina Das  <sudi.das@arm.com>

	* config/arm/vfp.md (*movhf_vfp_fp16): Add conds attribute.

*** gcc/testsuite/ChangeLog ***

2017-12-01  Sudakshina Das  <sudi.das@arm.com>

	* gcc.target/arm/armv8_2-fp16-move-2.c: New test.

From-SVN: r255301

	* function.h (struct function): Remove cilk_frame_decl,
	is_cilk_function and calls_cilk_spawn fields.
	* tree-inline.h (struct copy_body_data): Remove remap_var_for_cilk
	field.
	* omp-simd-clone.c (simd_clone_clauses_extract): Don't clear
	cilk_elemental field.
	* cgraph.h (struct cgraph_simd_clone): Remove cilk_elemental field.
	* target.def: Adjust comment.
	* config/i386/i386.c (ix86_simd_clone_compute_vecsize_and_simdlen):
	Don't test cilk_elemental.
c-family/
	* c-attribs.c (c_common_attribute_table): Remove "cilk simd function"
	attribute.
	(handle_simd_attribute): Don't check for "cilk simd function"
	attribute.  Reindent, formatting changes.
cp/
	* parser.c (cp_parser_new): Don't clear cilk_simd_fn_info.
	(parsing_nsdmi): Adjust comment.
	(cp_parser_omp_for_loop_init): Likewise.
	* parser.h (struct cp_omp_declare_simd_data): Adjust comment.
	(struct cp_parser): Remove cilk_simd_fn_info field.
	* cp-tree.h (cilk_valid_spawn): Remove.

From-SVN: r255300

re PR tree-optimization/83233 (gimple-ssa-store-merging.c:183:3: warning: unnamed type with no linkage used to declare variable with linkage)

	PR tree-optimization/83233
	* gimple-ssa-store-merging.c (nop_stats, bswap_stats): Use
	bswap_stat name for the struct.

From-SVN: r255299

	PR c/79153
	* tree.h (SWITCH_BREAK_LABEL_P): Define.
	* gimplify.c (collect_fallthrough_labels): Handle GIMPLE_BIND
	starting with a GIMPLE_SWITCH and ending with GIMPLE_LABEL with
	SWITCH_BREAK_LABEL_P set on the label.
	(gimplify_switch_expr): Set SWITCH_BREAK_LABEL_P on the label
	added for default case if it was missing and not all cases covered.
	Wrap GIMPLE_SWITCH and the switch_body_seq into a GIMPLE_BIND if
	switch_body_seq ends with a GIMPLE_LABEL with SWITCH_BREAK_LABEL_P
	set on the label.
	* tree-chrec.c (evolution_function_is_univariate_p): Add return true;
	to avoid -Wimplicit-fallthrough warning.
	* config/i386/i386.c (ix86_expand_special_args_builtin): Add
	FALLTHRU comment to avoid -Wimplicit-fallthrough warning.
c/
	* c-parser.c: Include tree-iterator.h.
	(c_parser_switch_statement): Emit LABEL_EXPR for the break label
	into SWITCH_BODY instead of after it and set SWITCH_BREAK_LABEL_P
	on it.
cp/
	* cp-gimplify.c (genericize_switch_stmt): Emit LABEL_EXPR for the
	break label into SWITCH_BODY instead of after it and set
	SWITCH_BREAK_LABEL_P on it.
	* parser.c (cp_parser_objc_expression): Add FALLTHRU comment to avoid
	-Wimplicit-fallthrough warning.
fortran/
	* match.c (gfc_match): Add FALLTHRU comment to avoid
	-Wimplicit-fallthrough warning.
testsuite/
	* c-c++-common/Wimplicit-fallthrough-7.c: Adjust expected warning
	line.
	* c-c++-common/Wimplicit-fallthrough-36.c: New test.

From-SVN: r255298

	PR tree-optimization/83221
	* tree-ssa-reassoc.c (sort_by_operand_rank): Shift bb_rank
	down by 16.
	(init_reassoc): Formatting fix.

From-SVN: r255297

	PR sanitizer/81275
	* tree-cfg.c (group_case_labels_stmt): Don't optimize away
	C++ FE implicitly added __builtin_unreachable () until -Wreturn-type
	is diagnosed.

	* c-c++-common/tsan/pr81275.c: Remove dg-skip-if.

From-SVN: r255296

	PR sanitizer/83219
	* tree-cfg.c: Include asan.h.
	(gimple_seq_unreachable_p): Return false for -fsanitize=unreachable.

From-SVN: r255295

re PR fortran/83224 (creating character array from elements shorter than declared does not pad with whitespace properly and aborts)

2017-12-01  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/83224
	* frontend-passes.c (realloc_string_callback): Handle
	case for which the RHS is an array expression.

2017-12-01  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/83224
	* gfortran.dg/dependency_50.f90: New test.

From-SVN: r255294

gcc/
	* config/i386/i386.md: Fix AVX512 register width in AVX512 instruction.

From-SVN: r255293

gcc/testsuite/
	* gcc.target/i386/avx512f-vpcompressb-2.c: Fix popcnt for 64b case.

From-SVN: r255292

gcc/
	* config/i386/i386.c (standard_sse_constant_opcode): Fix wrong form for
	vpcmpeqd instruction.

From-SVN: r255291