2019-12-16  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* sem_util.adb (Is_Atomic_Or_VFA_Object): Also return true for
	components whose type is Volatile_Full_Access or which are
	subject to the aspect/pragma individually.
	* sem_util.ads (Is_Atomic_Object_Entity): Small comment fix.

From-SVN: r279420

2019-12-16  Yannick Moy  <moy@adacore.com>

gcc/ada/

	* exp_ch6.adb: Fix comment.
	* sem_res.adb (Resolve_Call): Do not check No_Recursion
	restriction or indirectly No_Secondary_Stack restriction, when
	inside an ignored ghost subprogram.

From-SVN: r279419

2019-12-16  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

	* impunit.adb: Add a-nbnbin, a-nbnbre, a-nubinu to Ada 2020
	units.
	* Makefile.rtl: Enable new file.
	* libgnat/a-nbnbin.adb, libgnat/a-nbnbin.ads,
	libgnat/a-nbnbre.adb, libgnat/a-nbnbre.ads,
	libgnat/a-nubinu.ads: New files. Provide default standalone
	implementation of Ada.Numerics.Big_Numbers.Big_* based on
	System.Generic_Bignum.
	* libgnat/a-nbnbin__gmp.adb: Alternate implementation of
	Ada.Numerics.Big_Numbers.Big_Integers based on GMP. Not enabled
	for now.
	* libgnat/s-bignum.ads, libgnat/s-bignum.adb: Now a simple
	wrapper on top of s-genbig.ads.
	* libgnat/s-genbig.ads, libgnat/s-genbig.adb: New files, making
	s-bignum generic for reuse in Ada.Numerics.Big_Numbers.

From-SVN: r279418

2019-12-16  Bob Duff  <duff@adacore.com>

gcc/ada/

	* doc/gnat_ugn/building_executable_programs_with_gnat.rst:
	Correct documentation of -gnatw_C switch
	* gnat_ugn.texi: Regenerate.

From-SVN: r279417

2019-12-16  Joel Brobecker  <brobecker@adacore.com>

gcc/ada/

	* doc/gnat_ugn/building_executable_programs_with_gnat.rst
	(_Switches_for_gnatbind): Reword the section explaining the
	impact of -minimal on debugging.
	* gnat_ugn.texi: Regenerate.

From-SVN: r279416

2019-12-16  Gary Dismukes  <dismukes@adacore.com>

gcc/ada/

	* libgnat/g-exptty.adb, libgnat/g-exptty.ads: Typo fixes and
	minor reformatting.

From-SVN: r279415

2019-12-16  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* exp_ch6.adb (Requires_Atomic_Or_Volatile_Copy): New predicate.
	(Expand_Actuals): Use it to decide whether to add call by copy
	code as per the RM C.6(19) clause.
	* fe.h (Is_Atomic_Object): Remove.
	(Is_Volatile_Object): Likewise.
	* sem_util.ads (Is_Atomic_Object): Remove WARNING note.
	(Is_Volatile_Object): Likewise.
	* gcc-interface/trans.c (atomic_or_volatile_copy_required_p): Delete.
	(Call_to_gnu): Do not implement the  RM C.6(19) clause.

From-SVN: r279414

2019-12-16  Ghjuvan Lacambre  <lacambre@adacore.com>

gcc/ada/

	* sem_ch12.adb (Validate_Access_Subprogram_Instance): Add
	Can_Never_Be_Null checks.

From-SVN: r279413

2019-12-16  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* doc/gnat_rm/implementation_defined_pragmas.rst (VFA): Document
	extension of the no-aliasing rule to any subcomponent.
	* freeze.adb (Freeze_Object_Declaration): Small comment tweak.
	(Freeze_Record_Type): Do not deal with delayed aspect
	specifications for components here but...
	(Freeze_Entity): ...here instead.
	* sem_ch12.adb (Instantiate_Object): Improve wording of errors
	given for legality rules in C.6(12) and implement the new rule
	in C.6(13).
	* sem_res.adb (Resolve_Actuals): Likewise.
	* sem_prag.adb (Check_Atomic_VFA): New procedure implementing
	the new legality rules in C.6(13).
	(Process_Atomic_Independent_Shared_Volatile): Call
	Check_Atomic_VFA to check the legality rules.  Factor out code
	marking types into...
	(Mark_Type): ...this new procedure.
	(Check_VFA_Conflicts): Do not check the legality rules here.
	(Pragma_Atomic_Components): Call Check_Atomic_VFA on component
	type.
	* sem_util.ads (Is_Subcomponent_Of_Atomic_Object): Declare.
	* sem_util.adb (Is_Subcomponent_Of_Atomic_Object): New
	predicate.
	* gnat_rm.texi: Regenerate.

From-SVN: r279412

The backend emits 16 bit memory loads for single element character
vector.  As a result the character will not be right justified in the
GPR.

gcc/ChangeLog:

2019-12-16  Andreas Krebbel  <krebbel@linux.ibm.com>

	PR target/92950
	* config/s390/vector.md ("mov<mode>" for V_8): Replace lh, lhy,
	and lhrl with llc.

gcc/testsuite/ChangeLog:

2019-12-16  Andreas Krebbel  <krebbel@linux.ibm.com>

	PR target/92950
	* gcc.target/s390/vector/pr92950.c: New test.

From-SVN: r279410

2019-12-15  Andrew Pinski  <apinski@marvell.com>

        * gcc.c-torture/compile/bitfield-1.c: New test.
        * gcc.c-torture/compile/bitfield-endian-1.c: New test.
        * gcc.c-torture/compile/bitfield-endian-2.c: New test.

From-SVN: r279409

From-SVN: r279408

From-SVN: r279402

re PR preprocessor/92919 (invalid memory access in wide_str_to_charconst when running ucn2.C testcase (caught by hwasan))

	PR preprocessor/92919
	* charset.c (wide_str_to_charconst): If str contains just the
	NUL terminator, punt quietly.

From-SVN: r279399

gcc/ChangeLog:

	* doc/extend.texi (attribute access): Correct typos.

From-SVN: r279398

	PR ipa/92357
	* ipa-fnsummary.c (ipa_fn_summary_write): Use
	lto_symtab_encoder_iterator with lsei_start_function_in_partition and
	lsei_next_function_in_partition instead of walking all cgraph nodes
	in encoder.

From-SVN: r279395

	PR tree-optimization/92930
	* ipa-pure-const.c (special_builtin_state): Don't handle
	BUILT_IN_APPLY.  Formatting fixes.
	(check_call): Formatting fixes.

	* gcc.dg/tree-ssa/pr92930.c: New test.

From-SVN: r279394

On Darwin10 it's possible to make a 32b PPC build using the
'Rosetta' emulator.  However, these builds need to make use of
Darwin9 crts (for exes, dylibs and bundles).  This adds the
change to cater for bundles.

gcc/ChangeLog:

2019-12-14  Iain Sandoe  <iain@sandoe.co.uk>

	* config/darwin.h (DARWIN_EXTRA_SPECS): Add new
	bundle spec. (DARWIN_BUNDLE1_SPEC): New.
	(STARTFILE_SPEC): Use darwin bundle spec.
	* config/rs6000/darwin.h (DARWIN_BUNDLE1_SPEC): New.
	(DARWIN_DYLIB1_SPEC): Delete duplicate.

From-SVN: r279393

PR middle-end/91582 - missing heap overflow detection for strcpy
PR middle-end/92868 - ICE: tree check: expected integer_cst, have ssa_name

gcc/ChangeLog:

	PR middle-end/91582
	PR middle-end/92868
	* builtins.c (addr_decl_size): New function.
	(gimple_call_alloc_size): Add arguments.
	(compute_objsize): Add an argument.  Set *PDECL even for allocated
	objects.
	Correct checking for negative wide_int.
	Correct handling of negative outer offsets into unknown regions
	or with unknown inner offsets.
	Extend offsets to at most sizetype precision.
	Only handle constant subobject sizes.
	* builtins.h (gimple_call_alloc_size): Add arguments.
	* tree.c (component_ref_size): Always return sizetype.
	* tree-ssa-strlen.c (strinfo::alloc): New member.
	(get_addr_stridx): Add argument.
	(get_stridx): Use ptrdiff_t.  Add argument.
	(new_strinfo): Set new member.
	(get_string_length): Handle alloca and VLA.
	(dump_strlen_info): Dump more state.
	(maybe_invalidate): Print more info.  Decrease indentation.
	(unshare_strinfo): Set new member.
	(valid_builtin_call): Handle alloca and VLA.
	(maybe_warn_overflow): Check and set no-warning bit.  Improve
	handling of offsets.  Print allocated objects.
	(handle_builtin_strlen): Handle strinfo records with null lengths.
	(handle_builtin_strcpy): Add argument.  Call maybe_warn_overflow.
	(is_strlen_related_p): Handle dynamically allocated objects.
	(get_range): Add argument.
	(handle_builtin_malloc): Rename...
	(handle_alloc): ...to this and handle all allocation functions.
	(handle_builtin_memset): Call maybe_warn_overflow.
	(count_nonzero_bytes): Handle more MEM_REF forms.
	(strlen_check_and_optimize_call): Call handle_alloc_call.  Pass
	arguments to more callees.
	(handle_integral_assign): Add argument.  Create strinfo entries
	for MEM_REF assignments.
	(check_and_optimize_stmt): Handle more MEM_REF forms.

gcc/testsuite/ChangeLog:

	PR middle-end/91582
	* c-c++-common/Wrestrict.c: Adjust expected warnings.
	* gcc/testsuite/c-c++-common/Wstringop-truncation-4.c: Enable more
	warnings.
	* gcc/testsuite/c-c++-common/Wstringop-truncation.c: Remove an xfail.
	* gcc.dg/Warray-bounds-46.c: Disable -Wstringop-overflow.
	* gcc.dg/Warray-bounds-47.c: Same.
	* gcc.dg/Warray-bounds-52.c: New test.
	* gcc.dg/Wstringop-overflow-27.c: New test.
	* gcc.dg/Wstringop-overflow-28.c: New test.
	* gcc.dg/Wstringop-overflow-29.c: New test.
	* gcc.dg/attr-alloc_size.c (test): Disable -Warray-bounds.
	* gcc.dg/attr-copy-2.c: Adjust expected warnings.
	* gcc.dg/builtin-stringop-chk-5.c: Adjust text of expected messages.
	* gcc.dg/strlenopt-86.c: Relax test.
	* gcc.target/i386/pr82002-1.c: Prune expected warnings.

From-SVN: r279392

From-SVN: r279391

	PR libgomp/92881

	libgomp/
	* libgomp.h (gomp_remove_var_async): Add prototype.
	* oacc-mem.c (delete_copyout): Call gomp_remove_var_async instead of
	gomp_remove_var.
	* target.c (gomp_unref_tgt): Change return type to bool, indicating
	whether target_mem_desc was unmapped.
	(gomp_unref_tgt_void): New.
	(gomp_remove_var): Reimplement in terms of...
	(gomp_remove_var_internal): ...this new helper function.
	(gomp_remove_var_async): New, implemented using above helper function.
	(gomp_unmap_vars_internal): Use gomp_unref_tgt_void instead of
	gomp_unref_tgt.

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

From-SVN: r279388

On Darwin10 it's possible to make a 32b PPC build using the
'Rosetta' emulator.  However, these builds need to make use of
Darwin9 crts (for exes and dylibs).  This adds the change to
cater for dylibs.

gcc/ChangeLog:

2019-12-13  Iain Sandoe  <iain@sandoe.co.uk>

	* config/rs6000/darwin.h (DARWIN_DYLIB1_SPEC): New.

From-SVN: r279381

	* dwarf.c (struct attr): Add val field.
	(enum attr_val_encoding): Add ATTR_VAL_ADDDRESS_INDEX,
	ATTR_VAL_STRING_INDEX, ATTR_VAL_RNGLISTS_INDEX.
	(struct line_header): Add addrsize field.
	(struct line_header_format): Define.
	(struct unit): Add str_offsets_base, addr_base, and rnglists_base
	fields.
	(read_uint24): New static function.
	(read_attribute): Add implicit_val parameter.  Replace dwarf_str
	and dwarf_str_size parameters with dwarf_sections parameter.  Add
	support for new DWARF 5 forms.  Change all callers.
	(resolve_string): New static function.
	(resolve_addr_index): Likewise.
	(read_abbrevs): Support DW_FORM_implicit_const.
	(struct pcrange): Add lowpc_is_addr_index, highpc_is_addr_Index,
	and ranges_is_index fields.
	(update_pcrange): Support DWARF 5 encodings.
	(add_high_low_range): New static function, split out of
	add_ranges.
	(add_ranges_from_ranges): Likewise.
	(add_ranges_from_rnglists): New static function.
	(add_ranges): Just call new helper functions.
	(find_address_ranges): Use resolve_string for strings, after
	reading all attributes.  Handle new DWARF 5 attributes.
	(build_address_map): Support DWARF 5 compilation units.
	(read_v2_paths): New static function, split out of
	read_line_header.
	(read_lnct): New static	function.
	(read_line_header_format_entries): Likewise.
	(read_line_header): Add ddata parameter.  Support DWARF 5 line
	headers.  Call new helper functions.  Change all callers.
	(read_line_program): Use addrsize from line program header.  Don't
	special case directory index 0 for DWARF 5.
	(read_referenced_name): Use resolve_string.
	(read_function_entry): Handle DWARF 5 encodings.  Use
	resolve_string.
	* internal.h (enum dwarf_section): Add DEBUG_ADDR,
	DEBUG_STR_OFFSETS, DEBUG_LINE_STR, DEBUG_RNGLISTS.
	* elf.c (dwarf_section_names): Add new section names.
	* pecoff.c (dwarf_section_names): Likewise.
	* xcoff.c (xcoff_add): Clear dwarf_sections before setting
	fields.
	* configure.ac: Define HAVE_DWARF5 automake conditional.
	* Makefile.am (dwarf5_SOURCES): New variable if HAVE_DWARF5.
	(dwarf5_CFLAGS, dwarf5_LDADD): Likewise.
	(dwarf5_alloc_SOURCES, dwarf5_alloc_CFLAGS): Likewise.
	(dwarf5_alloc_LDADD): Likewise.
	(BUILDTESTS): Add dwarf5 tests if HAVE_DWARF5.
	(CLEANFILES, clean-local): Define.

From-SVN: r279380

	* lto-streamer-in.c (input_function): Add node parameter.
	(lto_read_body_or_constructor): Use it.

From-SVN: r279379

2019-12-13  Andrew Stubbs  <ams@codesourcery.com>

	libgomp/
	* testsuite/libgomp.oacc-c-c++-common/acc_prof-init-1.c: Handle gcn.
	* testsuite/libgomp.oacc-c-c++-common/acc_prof-kernels-1.c: Likewise.
	* testsuite/libgomp.oacc-c-c++-common/acc_prof-parallel-1.c: Likewise.
	* testsuite/libgomp.oacc-c-c++-common/asyncwait-nop-1.c: Likewise.
	* testsuite/libgomp.oacc-c-c++-common/function-not-offloaded.c:
	Likewise.
	* testsuite/libgomp.oacc-c-c++-common/async_queue-1.c: Disable on GCN.
	* testsuite/libgomp.oacc-c-c++-common/tile-1.c: Likewise.

From-SVN: r279378

	PR rtl-optimization/92591
	* modulo-sched.c (ps_add_node_check_conflicts): Improve checking
	for history > 0 case.

testsuite:

	PR rtl-optimization/92591
	* gcc.dg/pr92951-1.c: New test.
	* gcc.dg/pr92951-2.c: New test.

From-SVN: r279377

	* modulo-sched.c (sms_schedule): Use param_sms_max_ii_factor
	value instead of macro.  Adjust comment.
	(sms_schedule_by_order): Use parameter value without macro.
	* params.opt: Add ranges for modulo scheduler parameters,
	set param_sms_max_ii_factor = 2 by default.

From-SVN: r279376

	PR rtl-optimization/90001
	* ddg.c (create_ddg): Init max_dist array for each node.
	(free_ddg): Free max_dist array.
	(create_ddg_edge): Use bool field instead of aux union.
	(set_recurrence_length): Use prepared max_dist information instead
	of calling longest_simple_path.
	(create_scc): Remove graph argument, fill node's aux.count with
	SCC id, and move set_recurrence_length call to...
	(create_ddg_all_sccs): ...here, after filling all max_dist arrays
	using Floyd–Warshall-like algorithm.
	(update_dist_to_successors): Remove the whole function.
	(longest_simple_path): Likewise.
	* ddg.h (struct ddg_node): Add max_dist pointer.
	(struct ddg_edge): Use bool field instead of unused aux union.

From-SVN: r279375

2019-12-13  Andrew Stubbs  <ams@codesourcery.com>

	gcc/
	* config/gcn/gcn-valu.md (mulv64si3<exec>): Rename to ...
	(mul<mode>3<exec>): ... this, and implement sub-dword patterns.
	(mulv64si3_dup<exec>): Rename to ...
	(mul<mode>3_dup<exec>): ... this, and implement sub-dword patterns.

From-SVN: r279374

	* ipa-utils.c (ipa_merge_profiles): Improve dumping; merge common
	targets.

From-SVN: r279373

2019-12-13  Andrew Stubbs  <ams@codesourcery.com>

	gcc/
	* config/gcn/gcn-valu.md (sdwa): New mode attribute.
	(VCVT_FROM_MODE): Rename to ...
	(VCVT_MODE): ... this.
	(VCVT_TO_MODE): Delete mode iterator.
	(VCVT_FMODE): New mode iterator.
	(VCVT_IMODE): Likewise.
	(<cvt_name><VCVT_FROM_MODE:mode><VCVT_TO_MODE:mode>2<exec>): Change ...
	(<cvt_name><VCVT_MODE:mode><VCVT_FMODE:mode>2<exec>): ... to this.
	(<cvt_name><VCVT_FMODE:mode><VCVT_IMODE:mode>2<exec>): New.
	(zero_convert): New code iterator.
	(convop): New code attribute.
	(<convop><VEC_ALL1REG_INT_ALT:mode><VEC_ALL1REG_INT_MODE:mode>2<exec>)
	: New.
	(extend<VEC_ALL1REG_INT_ALT:mode><VEC_ALL1REG_INT_MODE:mode>2<exec>)
	: New.
	(vec_truncatev64div64si): Rename to ...
	(truncv64di<mode>2): ... this and implement sub-dword patterns.
	(vec_truncatev64div64si_exec): Rename to ...
	(truncv64di<mode>2_exec): ... this and implement sub-dword patterns.
	(<convop><mode>v64di2): New insn_and_split.
	(<convop><mode>v64di2_exec): Likewise.
	(mask_gather_load<mode>): Update truncate names.
	(mask_scatter_store<mode>): Likewise.
	* config/gcn/gcn.c (gcn_expand_scaled_offsets): Update truncate names.

From-SVN: r279372

2019-12-13  Dennis Zhang  <dennis.zhang@arm.com>

gcc/
	* config/aarch64/aarch64-arches.def (armv8.6-a): New.
	* config/aarch64/aarch64-c.c (aarch64_update_cpp_builtins): Define
	__ARM_FEATURE_MATMUL_INT8, __ARM_FEATURE_BF16_VECTOR_ARITHMETIC and
	__ARM_FEATURE_BF16_SCALAR_ARITHMETIC when enabled.
	* config/aarch64/aarch64-option-extensions.def (i8mm, bf16): New.
	(fp): Disabling fp also disables i8mm and bf16.
	(simd): Disabling simd also disables i8mm.
	* config/aarch64/aarch64.h (AARCH64_FL_V8_6): New macro.
	(AARCH64_FL_I8MM, AARCH64_FL_BF16, AARCH64_FL_FOR_ARCH8_6): Likewise.
	(AARCH64_ISA_V8_6, AARCH64_ISA_I8MM, AARCH64_ISA_BF16): Likewise.
	(TARGET_I8MM, TARGET_BF16_FP, TARGET_BF16_SIMD): Likewise.
	* doc/invoke.texi (armv8.6-a, i8mm, bf16): Document new options
	and add a new table to list permissible values for ARCH.

gcc/testsuite/
	* gcc.target/aarch64/pragma_cpp_predefs_2.c: Add tests for i8mm
	and bf16 features.

From-SVN: r279370

	PR target/92908
	* simplify-rtx.c (simplify_relational_operation): Punt for vector
	cmp_mode and scalar mode, if simplify_relational_operation returned
	const_true_rtx.
	(simplify_const_relational_operation): Change VOID_mode in function
	comment to VOIDmode.

	* gcc.target/i386/avx512bw-pr92908.c: New test.

From-SVN: r279369

2019-12-13  Gary Dismukes  <dismukes@adacore.com>

gcc/ada/

	* doc/gnat_rm/implementation_defined_pragmas.rst: Minor
	rewording of one sentence.
	* gnat_rm.texi: Regenerate.

From-SVN: r279368

2019-12-13  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

	* exp_unst.adb (Unnest_Subprogram): Account for trees produced
	by Annex E constructs.

From-SVN: r279367

2019-12-13  Ghjuvan Lacambre  <lacambre@adacore.com>

gcc/ada/

	* doc/gnat_rm/implementation_defined_pragmas.rst: Update
	Initialize_Scalars documentation.
	* gnat_rm.texi: Regenerate.

From-SVN: r279366

2019-12-13  Javier Miranda  <miranda@adacore.com>

gcc/ada/

	* sem_ch13.adb (Analyze_Aspect_Specification): Processing a
	precondition, if the expression is of the form A and then B, do
	not generate separate Pre/Post aspects for the separate clases
	when we are processing a generic unit. Required to avoid
	reporting spurious visibility errors on the instantiations.

From-SVN: r279365

2019-12-13  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* sem_res.adb (Resolve_Actuals): Give canonical error for
	illegal case of atomic/volatile parameter also if the formal is
	aliased.

From-SVN: r279364

2019-12-13  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* sem_util.ads (Is_Atomic_Object): Mention relevant RM clauses.
	* sem_util.adb (Is_Atomic_Object): For an indexed component,
	only look at the Has_Atomic_Components aspect of the prefix and
	do not recurse on it; for a selected component, do not look at
	the prefix.
	(Is_Atomic_Or_VFA_Object): Minor tweak.

From-SVN: r279363

2019-12-13  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

	* libgnat/a-calfor.ads, libgnat/a-calfor.adb (Split_Duration):
	New procedure.
	(Split, Image): Use Split_Duration. Update Image spec.

From-SVN: r279362