When recursing into a directory, any errors that occur while removing a
directory entry are ignored, because the subsequent increment of the
directory iterator clears the error_code object.

This fixes that bug by checking the result of each recursive operation
before incrementing. This is a change in observable behaviour, because
previously other directory entries would still be removed even if one
(or more) couldn't be removed due to errors. Now the operation stops on
the first error, which is what the code intended to do all along. The
standard doesn't specify what happens in this case (because the order
that the entries are processed is unspecified anyway).

It also improves the error reporting so that the name of the file that
could not be removed is included in the filesystem_error exception. This
is done by introducing a new helper type for reporting errors with
additional context and a new function that uses that type. Then the
overload of std::filesystem::remove_all that throws an exception can use
the new function to ensure any exception contains the additional
information.

For std::experimental::filesystem::remove_all just fix the bug where
errors are ignored.

	PR libstdc++/93201
	* src/c++17/fs_ops.cc (do_remove_all): New function implementing more
	detailed error reporting for remove_all. Check result of recursive
	call before incrementing iterator.
	(remove_all(const path&), remove_all(const path&, error_code&)): Use
	do_remove_all.
	* src/filesystem/ops.cc (remove_all(const path&, error_code&)): Check
	result of recursive call before incrementing iterator.
	* testsuite/27_io/filesystem/operations/remove_all.cc: Check errors
	are reported correctly.
	* testsuite/experimental/filesystem/operations/remove_all.cc: Likewise.

From-SVN: r280014

2020-01-08  Joel Brobecker  <brobecker@adacore.com>
          Olivier Hainque  <hainque@adacore.com>

	testsuite/
	* g++.target/aarch64/sve/tls_2.C: Add missing
	{ dg-require-effective-target fpic } directive.
	* gcc.target/aarch64/noplt_2.c: Likewise.
	* gcc.target/aarch64/noplt_3.c: Likewise.
	* gcc.target/aarch64/pic-constantpool1.c: Likewise.
	* gcc.target/aarch64/pic-small.c: Likewise.
	* gcc.target/aarch64/pic-symrefplus.c: Likewise.
	* gcc.target/aarch64/pr66912.c: Likewise.
	* gcc.target/aarch64/sve/tls_1.c: Likewise.
	* gcc.target/aarch64/sve/tls_preserve_1.c: Likewise.
	* gcc.target/aarch64/sve/tls_preserve_2.c: Likewise.
	* gcc.target/aarch64/sve/tls_preserve_3.c: Likewise.
	* gcc.target/aarch64/tlsie_tiny_1.c: Likewise.
	* gcc.target/aarch64/tlsle12_1.c: Likewise.
	* gcc.target/aarch64/tlsle12_tiny_1.c: Likewise.
	* gcc.target/aarch64/tlsle24_1.c: Likewise.
	* gcc.target/aarch64/tlsle24_tiny_1.c: Likewise.
	* gcc.target/aarch64/tlsle32_1.c: Likewise.
	* gcc.target/aarch64/tlsle_sizeadj_small_1.c: Likewise.
	* gcc.target/aarch64/tlsle_sizeadj_tiny_1.c: Likewise.

Co-Authored-By: Olivier Hainque <hainque@adacore.com>

From-SVN: r280013

	PR target/93187
	* config/i386/i386.md (*stack_protect_set_2_<mode> peephole2,
	*stack_protect_set_3 peephole2): Also check that the second
	insns source is general_operand.

	* g++.dg/opt/pr93187.C: New test.

From-SVN: r280012

	PR target/93174
	* config/i386/i386.md (addcarry<mode>_0): Use nonimmediate_operand
	predicate for output operand instead of register_operand.
	(addcarry<mode>, addcarry<mode>_1): Likewise.  Add alternative with
	memory destination and non-memory operands[2].

	* gcc.c-torture/compile/pr93174.c: New test.

From-SVN: r280011

2020-01-06  Olivier Hainque  <hainque@adacore.com>
	Alexandre Oliva  <oliva@adacore.com>

	* gcc.target/aarch64/stack-check-alloca.h: Remove
	#include alloca.h. #define alloca __builtin_alloca
	instead.
	* gcc.target/aarch64/stack-check-alloca-1.c: Add
	{ dg-require-effective-target alloca }.
	* gcc.target/aarch64/stack-check-alloca-2.c: Likewise.
	* gcc.target/aarch64/stack-check-alloca-3.c: Likewise.
	* gcc.target/aarch64/stack-check-alloca-4.c: Likewise.
	* gcc.target/aarch64/stack-check-alloca-5.c: Likewise.
	* gcc.target/aarch64/stack-check-alloca-6.c: Likewise.
	* gcc.target/aarch64/stack-check-alloca-7.c: Likewise.
	* gcc.target/aarch64/stack-check-alloca-8.c: Likewise.
	* gcc.target/aarch64/stack-check-alloca-9.c: Likewise.
	* gcc.target/aarch64/stack-check-alloca-10.c: Likewise.

Co-Authored-By: Alexandre Oliva <oliva@adacore.com>

From-SVN: r280010

2020-01-08  Martin Liska  <mliska@suse.cz>

	* cgraph.c (cgraph_node::dump): Use ::dump_name or
	::dump_asm_name instead of (::name or ::asm_name).
	* cgraphclones.c (symbol_table::materialize_all_clones): Likewise.
	* cgraphunit.c (walk_polymorphic_call_targets): Likewise.
	(analyze_functions): Likewise.
	(expand_all_functions): Likewise.
	* ipa-cp.c (ipcp_cloning_candidate_p): Likewise.
	(propagate_bits_across_jump_function): Likewise.
	(dump_profile_updates): Likewise.
	(ipcp_store_bits_results): Likewise.
	(ipcp_store_vr_results): Likewise.
	* ipa-devirt.c (dump_targets): Likewise.
	* ipa-fnsummary.c (analyze_function_body): Likewise.
	* ipa-hsa.c (check_warn_node_versionable): Likewise.
	(process_hsa_functions): Likewise.
	* ipa-icf.c (sem_item_optimizer::merge_classes): Likewise.
	(set_alias_uids): Likewise.
	* ipa-inline-transform.c (save_inline_function_body): Likewise.
	* ipa-inline.c (recursive_inlining): Likewise.
	(inline_to_all_callers_1): Likewise.
	(ipa_inline): Likewise.
	* ipa-profile.c (ipa_propagate_frequency_1): Likewise.
	(ipa_propagate_frequency): Likewise.
	* ipa-prop.c (ipa_make_edge_direct_to_target): Likewise.
	(remove_described_reference): Likewise.
	* ipa-pure-const.c (worse_state): Likewise.
	(check_retval_uses): Likewise.
	(analyze_function): Likewise.
	(propagate_pure_const): Likewise.
	(propagate_nothrow): Likewise.
	(dump_malloc_lattice): Likewise.
	(propagate_malloc): Likewise.
	(pass_local_pure_const::execute): Likewise.
	* ipa-visibility.c (optimize_weakref): Likewise.
	(function_and_variable_visibility): Likewise.
	* ipa.c (symbol_table::remove_unreachable_nodes): Likewise.
	(ipa_discover_variable_flags): Likewise.
	* lto-streamer-out.c (output_function): Likewise.
	(output_constructor): Likewise.
	* tree-inline.c (copy_bb): Likewise.
	* tree-ssa-structalias.c (ipa_pta_execute): Likewise.
	* varpool.c (symbol_table::remove_unreferenced_decls): Likewise.
2020-01-08  Martin Liska  <mliska@suse.cz>

	* lto-partition.c (add_symbol_to_partition_1): Use ::dump_name or
	::dump_asm_name instead of (::name or ::asm_name).
	(lto_balanced_map): Likewise.
	(promote_symbol): Likewise.
	(rename_statics): Likewise.
	* lto.c (lto_wpa_write_files): Likewise.
2020-01-08  Martin Liska  <mliska@suse.cz>

	* gcc.dg/ipa/ipa-icf-1.c: Update expected scanned output.
	* gcc.dg/ipa/ipa-icf-10.c: Likewise.
	* gcc.dg/ipa/ipa-icf-11.c: Likewise.
	* gcc.dg/ipa/ipa-icf-12.c: Likewise.
	* gcc.dg/ipa/ipa-icf-13.c: Likewise.
	* gcc.dg/ipa/ipa-icf-16.c: Likewise.
	* gcc.dg/ipa/ipa-icf-18.c: Likewise.
	* gcc.dg/ipa/ipa-icf-2.c: Likewise.
	* gcc.dg/ipa/ipa-icf-20.c: Likewise.
	* gcc.dg/ipa/ipa-icf-21.c: Likewise.
	* gcc.dg/ipa/ipa-icf-23.c: Likewise.
	* gcc.dg/ipa/ipa-icf-25.c: Likewise.
	* gcc.dg/ipa/ipa-icf-26.c: Likewise.
	* gcc.dg/ipa/ipa-icf-27.c: Likewise.
	* gcc.dg/ipa/ipa-icf-3.c: Likewise.
	* gcc.dg/ipa/ipa-icf-35.c: Likewise.
	* gcc.dg/ipa/ipa-icf-36.c: Likewise.
	* gcc.dg/ipa/ipa-icf-37.c: Likewise.
	* gcc.dg/ipa/ipa-icf-38.c: Likewise.
	* gcc.dg/ipa/ipa-icf-5.c: Likewise.
	* gcc.dg/ipa/ipa-icf-7.c: Likewise.
	* gcc.dg/ipa/ipa-icf-8.c: Likewise.
	* gcc.dg/ipa/ipa-icf-merge-1.c: Likewise.
	* gcc.dg/ipa/pr64307.c: Likewise.
	* gcc.dg/ipa/pr90555.c: Likewise.
	* gcc.dg/ipa/propmalloc-1.c: Likewise.
	* gcc.dg/ipa/propmalloc-2.c: Likewise.
	* gcc.dg/ipa/propmalloc-3.c: Likewise.

From-SVN: r280009

From-SVN: r280008

From-SVN: r280007

2020-01-08  Richard Biener  <rguenther@suse.de>

	PR middle-end/93199
	* tree-eh.c (sink_clobbers): Update virtual operands for
	the first and last stmt only.  Add a dry-run capability.
	(pass_lower_eh_dispatch::execute): Perform clobber sinking
	after CFG manipulations and in RPO order to catch all
	secondary opportunities reliably.

From-SVN: r280006

	PR target/93182
	* doc/invoke.texi (AVR Options) <-nodevicespecs>: Document.

From-SVN: r280005

2020-01-08  Richard Biener  <rguenther@suse.de>

	PR testsuite/92997
	* gcc.dg/torture/ftrapv-1.c (iaddv): Use noipa attribute.

From-SVN: r280003

From-SVN: r280002

2019-01-08  Richard Biener  <rguenther@suse.de>

	PR middle-end/93199
	c/
	* gimple-parser.c (c_parser_parse_gimple_body): Remove __PHI IFN
	permanently.

	* gimple-fold.c (rewrite_to_defined_overflow): Mark stmt modified.
	* tree-ssa-loop-im.c (move_computations_worker): Properly adjust
	virtual operand, also updating SSA use.
	* gimple-loop-interchange.cc (loop_cand::undo_simple_reduction):
	Update stmt after resetting virtual operand.
	(tree_loop_interchange::move_code_to_inner_loop): Likewise.

	* gimple-iterator.c (gsi_remove): When not removing the stmt
	permanently do not delink immediate uses or mark the stmt modified.

From-SVN: r280000

2020-01-08  Martin Liska  <mliska@suse.cz>

	* ipa-fnsummary.c (dump_ipa_call_summary): Use symtab_node::dump_name.
	(ipa_call_context::estimate_size_and_time): Likewise.
	(inline_analyze_function): Likewise.
2020-01-08  Martin Liska  <mliska@suse.cz>

	* lto-partition.c (lto_balanced_map): Use symtab_node::dump_name.

From-SVN: r279999

2020-01-08  Martin Liska  <mliska@suse.cz>

	* cgraph.c (cgraph_node::dump): Use systematically
	dump_asm_name.

From-SVN: r279998

gcc/
	Add -nodevicespecs option for avr.

	PR target/93182
	* config/avr/avr.opt (-nodevicespecs): New driver option.
	* config/avr/driver-avr.c (avr_devicespecs_file): Only issue
	"-specs=device-specs/..." if that option is not set.
	* doc/invoke.texi (AVR Options) <-nodevicespecs>: Document.

From-SVN: r279995

gcc/
	PR target/92055
	* config.gcc (tm_defines) [target=avr]: Support --with-libf7,
	--with-double-comparison.
	* doc/install.texi: Document them.
	* config/avr/avr-c.c (avr_cpu_cpp_builtins)
	<WITH_LIBF7_LIBGCC, WITH_LIBF7_MATH, WITH_LIBF7_MATH_SYMBOLS>
	<WITH_DOUBLE_COMPARISON>: New built-in defines.
	* doc/invoke.texi (AVR Built-in Macros): Document them.
	* config/avr/avr-protos.h (avr_float_lib_compare_returns_bool): New.
	* config/avr/avr.c (avr_float_lib_compare_returns_bool): New function.
	* config/avr/avr.h (FLOAT_LIB_COMPARE_RETURNS_BOOL): New macro.
libgcc/
	PR target/92055
	* config.host (tmake_file) [target=avr]: Add t-libf7,
	t-libf7-math, t-libf7-math-symbols as specified by --with-libf7=.
	* config/avr/t-avrlibc: Don't copy libgcc.a if there are modules
	depending on sizeof (double) or sizeof (long double).
	* config/avr/libf7: New folder.
libgcc/config/avr/libf7/
	PR target/92055
	* t-libf7: New file.
	* t-libf7-math: New file.
	* t-libf7-math-symbols: New file.
	* libf7-common.mk: New file.
	* libf7-asm-object.mk: New file.
	* libf7-c-object.mk: New file.
	* asm-defs.h: New file.
	* libf7.h: New file.
	* libf7.c: New file.
	* libf7-asm.sx: New file.
	* libf7-array.def: New file.
	* libf7-const.def: New file.
	* libf7-constdef.h: New file.
	* f7renames.sh: New script.
	* f7wraps.sh: New script.
	* f7-renames.h: New generated file.
	* f7-wraps.h: New generated file.

From-SVN: r279994

When only the rmprofile multilibs are built, compiling for armv7-a
should select the generic v7 multilibs.  This used to work before +sec
and +mp were added to the architecture options but it was broken by
that update.  This patch fixes those variants and adds some tests to
ensure that they remain fixed ;-)

	PR target/93188
	* config/arm/t-multilib (MULTILIB_MATCHES): Add rules to match
	armv7-a{+mp,+sec,+mp+sec} to appropriate armv7 multilib variants
	when only building rm-profile multilibs.

	* gcc.target/arm/multilib.exp: Add new tests for rm-profile only.

From-SVN: r279993

From-SVN: r279989

2020-01-07  Thomas Rodgers  <trodgers@redhat.com>

	* include/std/condition_variable
	(condition_variable_any::wait_on): Rename to match current draft
	standard.
	(condition_variable_any::wait_on_until): Likewise.
	(condition_variable_any::wait_on_for): Likewise.
	* testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc:
	Adjust tests to account for renamed methods.

From-SVN: r279988

2020-01-08  Feng Xue  <fxue@os.amperecomputing.com>

        PR ipa/93084
        * ipa-cp.c (self_recursively_generated_p): Find matched aggregate
        lattice for a value to check.
        (propagate_vals_across_arith_jfunc): Add an assertion to ensure
        finite propagation in self-recursive scc.

2020-01-08  Feng Xue  <fxue@os.amperecomputing.com>

        PR ipa/93084
        * gcc.dg/ipa/ipa-clone-3.c: New test.

From-SVN: r279987

We need to revert one line of code change from r279942 due to
performance degression.

gcc/ChangeLog:

	2020-01-08  Luo Xiong Hu  <luoxhu@linux.ibm.com>

	PR middle-end/93189
	* ipa-inline.c (caller_growth_limits): Restore the AND.

From-SVN: r279986

    
    In the gc compiler, for slicing an array, its AST has an implicit
    address operation node. There isn't such node in the gofrontend
    AST. During the escape analysis, we create a fake node to mimic
    the gc compiler's behavior. For the fake node, the loopdepth was
    not tracked correctly, causing miscompilation. Since this is an
    address operation, do the same thing as we do for the address
    operator.
    
    Fixes golang/go#36404.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/213643

From-SVN: r279984

From-SVN: r279983

    
    Use specific panic functions instead, which are mostly already in the
    runtime package.
    
    Also correct "defer nil" to panic when we execute the defer, rather
    than throw when we queue it.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/213642

From-SVN: r279979

From-SVN: r279973

From-SVN: r279972

From-SVN: r279971

	* include/bits/stl_tree.h
	(_Rb_tree<>::_M_move_assign(_Rb_tree&, false_type)): Replace
	std::move_if_noexcept by std::move.
	* testsuite/23_containers/map/92124.cc: New.
	* testsuite/23_containers/set/92124.cc: New.

From-SVN: r279967

/gcc/cp
2020-01-07  Paolo Carlini  <paolo.carlini@oracle.com>

	* init.c (build_new): Add location_t parameter and use it throughout.
	(build_raw_new_expr): Likewise.
	* parser.c (cp_parser_new_expression): Pass the combined_loc.
	* pt.c (tsubst_copy_and_build): Adjust call.
	* cp-tree.h: Update declarations.

/libcc1
2020-01-07  Paolo Carlini  <paolo.carlini@oracle.com>

	* libcp1plugin.cc (plugin_build_new_expr): Update build_new call.

/gcc/testsuite
2020-01-07  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.old-deja/g++.bugs/900208_03.C: Check locations too.
	* g++.old-deja/g++.bugs/900519_06.C: Likewise.

From-SVN: r279963

    
    This avoids generating a write barrier for code that appears in the
    Go1.14beta1 runtime package in (*pageAlloc).sysGrow:
        s.summary[l] = s.summary[l][:needIdxLimit]
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/213558

From-SVN: r279962

2020-01-07  Andrew Stubbs  <ams@codesourcery.com>

	gcc/
	* config/gcn/gcn-valu.md (VEC_1REG_INT_ALT): Delete iterator.
	(VEC_ALLREG_ALT): New iterator.
	(VEC_ALLREG_INT_MODE): New iterator.
	(VCMP_MODE): New iterator.
	(VCMP_MODE_INT): New iterator.
	(vec_cmpu<mode>di): Use VCMP_MODE_INT.
	(vec_cmp<u>v64qidi): New define_expand.
	(vec_cmp<mode>di_exec): Use VCMP_MODE.
	(vec_cmpu<mode>di_exec): New define_expand.
	(vec_cmp<u>v64qidi_exec): New define_expand.
	(vec_cmp<mode>di_dup): Use VCMP_MODE.
	(vec_cmp<mode>di_dup_exec): Use VCMP_MODE.
	(vcond<VEC_ALL1REG_MODE:mode><VEC_1REG_ALT:mode>): Rename ...
	(vcond<VEC_ALLREG_MODE:mode><VEC_ALLREG_ALT:mode>): ... to this.
	(vcond<VEC_ALL1REG_MODE:mode><VEC_1REG_ALT:mode>_exec): Rename ...
	(vcond<VEC_ALLREG_MODE:mode><VEC_ALLREG_ALT:mode>_exec): ... to this.
	(vcondu<VEC_ALL1REG_MODE:mode><VEC_1REG_INT_ALT:mode>): Rename ...
	(vcondu<VEC_ALLREG_MODE:mode><VEC_ALLREG_INT_MODE:mode>): ... to this.
	(vcondu<VEC_ALL1REG_MODE:mode><VEC_1REG_INT_ALT:mode>_exec): Rename ...
	(vcondu<VEC_ALLREG_MODE:mode><VEC_ALLREG_INT_MODE:mode>_exec): ... to
	this.
	* config/gcn/gcn.c (print_operand): Fix 8 and 16 bit suffixes.
	* config/gcn/gcn.md (expander): Add sign_extend and zero_extend.

From-SVN: r279961

DECL_VISIBILITY_SPECIFIED is also true if an enclosing scope has explicit
visibility, and we don't want that to override -fvisibility-inlines-hidden.
So check for the attribute specifically on the function, like we already do
for template argument visibility restriction.

	* decl2.c (determine_visibility): -fvisibility-inlines-hidden beats
	explicit class visibility for a template.

From-SVN: r279960

2020-01-07  Andrew Stubbs  <ams@codesourcery.com>

	gcc/
	* config/gcn/constraints.md (DA): Update description and match.
	(DB): Likewise.
	(Db): New constraint.
	* config/gcn/gcn-protos.h (gcn_inline_constant64_p): Add second
	parameter.
	* config/gcn/gcn.c (gcn_inline_constant64_p): Add 'mixed' parameter.
	Implement 'Db' mixed immediate type.
	* config/gcn/gcn-valu.md (addcv64si3<exec_vcc>): Rework constraints.
	(addcv64si3_dup<exec_vcc>): Delete.
	(subcv64si3<exec_vcc>): Rework constraints.
	(addv64di3): Rework constraints.
	(addv64di3_exec): Rework constraints.
	(subv64di3): Rework constraints.
	(addv64di3_dup): Delete.
	(addv64di3_dup_exec): Delete.
	(addv64di3_zext): Rework constraints.
	(addv64di3_zext_exec): Rework constraints.
	(addv64di3_zext_dup): Rework constraints.
	(addv64di3_zext_dup_exec): Rework constraints.
	(addv64di3_zext_dup2): Rework constraints.
	(addv64di3_zext_dup2_exec): Rework constraints.
	(addv64di3_sext_dup2): Rework constraints.
	(addv64di3_sext_dup2_exec): Rework constraints.

From-SVN: r279959

gcc/testsuite/ChangeLog:
2020-01-07  Andre Vieira  <andre.simoesdiasvieira@arm.com>

	* gcc.dg/vect/vect-epilogues.c: XFAIL for arm big endian.

From-SVN: r279958

gcc/ChangeLog:
2020-01-07  Andre Vieira  <andre.simoesdiasvieira@arm.com>

	* doc/sourcebuild.texi (arm_little_endian, arm_nothumb): Documented
	existing target checks.

From-SVN: r279957

    
    These came up while building 1.14beta1 while the code was still invalid.
    The policy is to not bother committing invalid test cases that cause
    compiler crashes.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/213537

From-SVN: r279956

2020-01-07  Richard Biener  <rguenther@suse.de>

	* doc/install.texi: Bump minimal supported MPC version.

From-SVN: r279955

Normally we only create SVE ACLE functions when arm_sve.h is included.
But for LTO we need to do it at start-up, so that the functions are
already defined when streaming in the LTO objects.

One hitch with doing that is that LTO doesn't yet implement the
simulate_enum_decl langhook.  This patch adds a simple default
implementation that it can use.

2020-01-07  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* langhooks-def.h (lhd_simulate_enum_decl): Declare.
	(LANG_HOOKS_SIMULATE_ENUM_DECL): Use it.
	* langhooks.c: Include stor-layout.h.
	(lhd_simulate_enum_decl): New function.
	* config/aarch64/aarch64-sve-builtins.cc (init_builtins): Call
	handle_arm_sve_h for the LTO frontend.
	(register_vector_type): Cope with null returns from pushdecl.

gcc/testsuite/
	* gcc.target/aarch64/sve/pcs/asm_4.c: New test.

From-SVN: r279954

The SVE port needs to maintain a different type identity for
GNU vectors and "SVE vectors", since the types use different ABIs.
Until now we've done that using pointer equality between the
TYPE_MAIN_VARIANT and the built-in SVE type.

However, as Richard B noted, that doesn't work well for LTO,
where we stream both GNU and SVE types from a file instead of
creating them directly.  We need a mechanism for distinguishing
the types using streamed type information.

This patch does that using a new type attribute.  This attribute
is only meant to be used for the built-in SVE types and shouldn't
be user-visible.  The patch tries to ensure this by including a space
in the attribute name, like we already do for things like "fn spec"
and "omp declare simd".

2020-01-07  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* config/aarch64/aarch64-protos.h (aarch64_sve::svbool_type_p)
	(aarch64_sve::nvectors_if_data_type): Replace with...
	(aarch64_sve::builtin_type_p): ...this.
	* config/aarch64/aarch64-sve-builtins.cc: Include attribs.h.
	(find_vector_type): Delete.
	(add_sve_type_attribute): New function.
	(lookup_sve_type_attribute): Likewise.
	(register_builtin_types): Add an "SVE type" attribute to each type.
	(register_tuple_type): Likewise.
	(svbool_type_p, nvectors_if_data_type): Delete.
	(mangle_builtin_type): Use lookup_sve_type_attribute.
	(builtin_type_p): Likewise.  Add an overload that returns the
	number of constituent vector and predicate registers.
	* config/aarch64/aarch64.c (aarch64_sve_argument_p): Delete.
	(aarch64_returns_value_in_sve_regs_p): Use aarch64_sve::builtin_type_p
	instead of aarch64_sve_argument_p.
	(aarch64_takes_arguments_in_sve_regs_p): Likewise.
	(aarch64_pass_by_reference): Likewise.
	(aarch64_function_value_1): Likewise.
	(aarch64_return_in_memory): Likewise.
	(aarch64_layout_arg): Likewise.

gcc/testsuite/
	* g++.target/aarch64/sve/acle/general-c++/mangle_5.C: New test.
	* gcc.target/aarch64/sve/pcs/asm_1.c: Likewise.
	* gcc.target/aarch64/sve/pcs/asm_2.c: Likewise.
	* gcc.target/aarch64/sve/pcs/asm_3.c: Likewise.

From-SVN: r279953