C11 DR#444 dealt with how C11 intended to allow alignment specifiers
on struct and union members, but failed to include that in the syntax.
The final resolution of that DR also allows alignment specifiers in
type names in compound literals (in order to apply an increased
alignment to the unnamed object created by the compound literal), but
not other cases of type names.

This patch implements allowing alignment specifiers in compound
literals and adds tests for the resolution of the DR (including that
they are allowed on struct and union members, which GCC already
implemented).  Because the parser has to parse the parenthesized type
name of a compound literal before it can tell that it's a compound
literal (rather than, depending on the context, a cast expression or
sizeof (type-name) or _Alignof (type-name)), this means _Alignas
specifiers are allowed syntactically in those contexts and then an
error is given once it's known to be an invalid use (whereas _Alignas
specifiers are disallowed syntactically in other contexts where type
names can occur and a compound literal is not possible).

Bootstrapped with no regressions on x86_64-pc-linux-gnu.

gcc/c:
	* c-decl.c (build_compound_literal): Add parameter alignas_align
	and set alignment of decl if nonzero.
	* c-parser.c (c_keyword_starts_typename): Allow RID_ALIGNAS.
	(c_parser_declspecs): Allow RID_ALIGNAS to follow a type, like a
	qualifier.
	(c_parser_struct_declaration): Update syntax comment.
	(c_parser_type_name): Add alignas_ok argument and pass it to
	c_parser_declspecs.
	(c_parser_cast_expression): Pass true to c_parser_type_name and
	give error if a cast used an _Alignas specifier.
	(c_parser_sizeof_expression): Pass true to c_parser_type_name and
	give error if sizeof (type-name) used an _Alignas specifier.
	(c_parser_alignof_expression): Pass true to c_parser_type_name and
	give error if _Alignof (type-name) used an _Alignas specifier.
	(c_parser_postfix_expression_after_paren_type): Check specified
	alignment for a compound literal and pass it to
	build_compound_literal.
	* c-parser.h (c_parser_type_name): Update prototype.
	* c-tree.h (build_compound_literal): Update prototype.

gcc/testsuite:
	* gcc.dg/c11-align-7.c, gcc.dg/c11-align-8.c,
	gcc.dg/c11-align-9.c, gcc.dg/gnu11-align-1.c: New tests.
	* gcc.dg/c11-align-5.c (test): Update expected error for sizeof
	case.

From-SVN: r255482

Three related regression fixes:

- We can't use asserts like:

    gcc_assert (GET_MODE_SIZE (mode) == 16);

  in aarch64_print_operand because it could trigger for invalid user input.

- The output_operand_lossage in aarch64_print_address_internal:

    output_operand_lossage ("invalid operand for '%%%c'", op);

  wasn't right because "op" is an rtx_code enum rather than the
  prefix character.

- aarch64_print_operand_address shouldn't call output_operand_lossage
  (because it doesn't have a prefix code) but instead fall back to
  output_addr_const.

2017-12-05  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* config/aarch64/aarch64.c (aarch64_print_address_internal): Return
	a bool success value.  Don't call output_operand_lossage here.
	(aarch64_print_ldpstp_address): Return a bool success value.
	(aarch64_print_operand_address): Call output_addr_const if
	aarch64_print_address_internal fails.
	(aarch64_print_operand): Don't assert that the mode is 16 bytes for
	'y'; call output_operand_lossage instead.  Call output_operand_lossage
	if aarch64_print_ldpstp_address fails.

gcc/testsuite/
	* gcc.target/aarch64/asm-2.c: New test.
	* gcc.target/aarch64/asm-3.c: Likewise.

From-SVN: r255481

This patch makes various bits of code operate directly on the new
VECTOR_CST encoding, instead of using VECTOR_CST_ELT on all elements
of the vector.

Previous patches handled operations that produce a new VECTOR_CST,
while this patch handles things like predicates.  It also makes
print_node dump the encoding instead of the full vector that
the encoding represents.

2017-12-07  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* tree-vector-builder.h
	(tree_vector_builder::binary_encoded_nelts): Declare.
	* tree-vector-builder.c
	(tree_vector_builder::binary_encoded_nelts): New function.
	* fold-const.c (negate_expr_p): Likewise.
	(operand_equal_p, fold_checksum_tree): Likewise.
	* tree-loop-distribution.c (const_with_all_bytes_same): Likewise.
	* tree.c (integer_zerop, integer_onep, integer_all_onesp, real_zerop)
	(real_onep, real_minus_onep, add_expr, initializer_zerop): Likewise.
	(uniform_vector_p): Likewise.
	* varasm.c (const_hash_1, compare_constant): Likewise.
	* tree-ssa-ccp.c: Include tree-vector-builder.h.
	(valid_lattice_transition): Operate directly on the VECTOR_CST
	encoding.
	* ipa-icf.c: Include tree-vector-builder.h.
	(sem_variable::equals): Operate directly on the VECTOR_CST encoding.
	* print-tree.c (print_node): Print encoding of VECTOR_CSTs.

From-SVN: r255480

The only remaining uses of build_vector are in the selftests in tree.c.
This patch makes it static and moves it to the selftest part of the file.

2017-12-07  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* tree.c (build_vector): Delete.
	* tree.h (build_vector): Make static and move into the self-testing
	block.

From-SVN: r255479

This patch changes gimple_build_vector so that it takes a
tree_vector_builder instead of a size and a vector of trees.

2017-12-07  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* vector-builder.h (vector_builder::derived): New const overload.
	(vector_builder::elt): New function.
	* tree-vector-builder.h (tree_vector_builder::type): New function.
	(tree_vector_builder::apply_step): Declare.
	* tree-vector-builder.c (tree_vector_builder::apply_step): New
	function.
	* gimple-fold.h (tree_vector_builder): Declare.
	(gimple_build_vector): Take a tree_vector_builder instead of a
	type and vector of elements.
	* gimple-fold.c (gimple_build_vector): Likewise.
	* tree-vect-loop.c (get_initial_def_for_reduction): Update call
	accordingly.
	(get_initial_defs_for_reduction): Likewise.
	(vectorizable_induction): Likewise.

From-SVN: r255478

This patch makes fold-const.c operate directly on the VECTOR_CST
encoding when folding an operation that has two VECTOR_CST inputs.

2017-12-07  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* tree-vector-builder.h
	(tree_vector_builder::new_binary_operation): Declare.
	* tree-vector-builder.c
	(tree_vector_builder::new_binary_operation): New function.
	* fold-const.c (fold_relational_const): Use it.
	(const_binop): Likewise.  Check that both input vectors have
	the same number of elements, thus excluding things like WIDEN_SUM.
	Check whether it is possible to operate directly on the encodings
	of stepped inputs.

From-SVN: r255477

This patch makes fold-const.c operate directly on the VECTOR_CST
encoding when folding an operation that has a single VECTOR_CST input.

2017-12-07  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* fold-const.c (fold_negate_expr_1): Use tree_vector_builder and
	new_unary_operation, operating only on the encoded elements.
	(const_unop): Likewise.
	(exact_inverse): Likewise.
	(distributes_over_addition_p): New function.
	(const_binop): Use tree_vector_builder and new_unary_operation
	for combinations of VECTOR_CST and INTEGER_CST.  Operate only
	on the encoded elements unless the encoding is strided and the
	operation does not distribute over addition.
	(fold_convert_const):  Use tree_vector_builder and
	new_unary_operation.  Operate only on the encoded elements
	for truncating integer conversions, or for non-stepped encodings.

From-SVN: r255476

This patch switches most build_vector calls over to tree_vector_builder,
using explicit encodings where appropriate.  Later patches handle
the remaining uses of build_vector.

2017-12-07  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* config/sparc/sparc.c: Include tree-vector-builder.h.
	(sparc_fold_builtin): Use tree_vector_builder instead of build_vector.
	* expmed.c: Include tree-vector-builder.h.
	(make_tree): Use tree_vector_builder instead of build_vector.
	* fold-const.c: Include tree-vector-builder.h.
	(const_binop): Use tree_vector_builder instead of build_vector.
	(const_unop): Likewise.
	(native_interpret_vector): Likewise.
	(fold_vec_perm): Likewise.
	(fold_ternary_loc): Likewise.
	* gimple-fold.c: Include tree-vector-builder.h.
	(gimple_fold_stmt_to_constant_1): Use tree_vector_builder instead
	of build_vector.
	* tree-ssa-forwprop.c: Include tree-vector-builder.h.
	(simplify_vector_constructor): Use tree_vector_builder instead
	of build_vector.
	* tree-vect-generic.c: Include tree-vector-builder.h.
	(add_rshift): Use tree_vector_builder instead of build_vector.
	(expand_vector_divmod): Likewise.
	(optimize_vector_constructor): Likewise.
	* tree-vect-loop.c: Include tree-vector-builder.h.
	(vect_create_epilog_for_reduction): Use tree_vector_builder instead
	of build_vector.  Explicitly use a stepped encoding for
	{ 1, 2, 3, ... }.
	* tree-vect-slp.c: Include tree-vector-builder.h.
	(vect_get_constant_vectors): Use tree_vector_builder instead
	of build_vector.
	(vect_transform_slp_perm_load): Likewise.
	(vect_schedule_slp_instance): Likewise.
	* tree-vect-stmts.c: Include tree-vector-builder.h.
	(vectorizable_bswap): Use tree_vector_builder instead of build_vector.
	(vect_gen_perm_mask_any): Likewise.
	(vectorizable_call): Likewise.  Explicitly use a stepped encoding.
	* tree.c: (build_vector_from_ctor): Use tree_vector_builder instead
	of build_vector.
	(build_vector_from_val): Likewise.  Explicitly use a duplicate
	encoding.

From-SVN: r255475

This patch uses a simple compression scheme to represent the contents
of a VECTOR_CST using its leading elements.  There are three formats:

1) a repeating sequence of N values.  This is encoded using the first
   N elements.

2) a "foreground" sequence of N values inserted at the beginning of
   a "background" repeating sequence of N values, such as:
   { 1, 2, 0, 0, 0, 0, ... }.  This is encoded using the first 2*N
   elements.

2) a "foreground" sequence of N values inserted at the beginning of
   a "background" repeating sequence of N interleaved linear series,
   such as: { 0, 0, 8, 10, 9, 11, 10, 12, ... }.  This is encoded
   using the first 3*N elements.  In practice the foreground values
   are often part of the same series as the background values,
   such as: { 1, 11, 2, 12, 3, 13, ... }.

This reduces the amount of work involved in processing simple
vector constants and means that the encoding extends naturally
to variable-length vectors.

2017-12-07  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* doc/generic.texi (VECTOR_CST): Describe new representation of
	vector constants.
	* vector-builder.h: New file.
	* tree-vector-builder.h: Likewise.
	* tree-vector-builder.c: Likewise.
	* Makefile.in (OBJS): Add tree-vector-builder.o.
	* tree.def (VECTOR_CST): Update comment to refer to generic.texi.
	* tree-core.h (tree_base): Add a vector_cst field to the u union.
	(tree_vector): Change the number of elements to
	vector_cst_encoded_nelts.
	* tree.h (VECTOR_CST_NELTS): Redefine using TYPE_VECTOR_SUBPARTS.
	(VECTOR_CST_ELTS): Delete.
	(VECTOR_CST_ELT): Redefine using vector_cst_elt.
	(VECTOR_CST_LOG2_NPATTERNS, VECTOR_CST_NPATTERNS): New macros.
	(VECTOR_CST_NELTS_PER_PATTERN, VECTOR_CST_DUPLICATE_P): Likewise.
	(VECTOR_CST_STEPPED_P, VECTOR_CST_ENCODED_ELTS): Likewise.
	(VECTOR_CST_ENCODED_ELT): Likewise.
	(vector_cst_encoded_nelts): New function.
	(make_vector): Take the values of VECTOR_CST_LOG2_NPATTERNS and
	VECTOR_CST_NELTS_PER_PATTERN as arguments.
	(vector_cst_int_elt, vector_cst_elt): Declare.
	* tree.c: Include tree-vector-builder.h.
	(tree_code_size): Abort if passed VECTOR_CST.
	(tree_size): Update for new VECTOR_CST layout.
	(make_vector): Take the values of VECTOR_CST_LOG2_NPATTERNS and
	VECTOR_CST_NELTS_PER_PATTERN as arguments.
	(build_vector): Use tree_vector_builder.
	(vector_cst_int_elt, vector_cst_elt): New functions.
	(drop_tree_overflow): For VECTOR_CST, drop the TREE_OVERFLOW from the
	encoded elements and then create the vector in the canonical form.
	(check_vector_cst, check_vector_cst_duplicate, check_vector_cst_fill)
	(check_vector_cst_stepped, test_vector_cst_patterns): New functions.
	(tree_c_tests): Call test_vector_cst_patterns.
	* lto-streamer-out.c (DFS::DFS_write_tree_body): Handle the new
	VECTOR_CST fields.
	(hash_tree): Likewise.
	* tree-streamer-out.c (write_ts_vector_tree_pointers): Likewise.
	(streamer_write_tree_header): Likewise.
	* tree-streamer-in.c (lto_input_ts_vector_tree_pointers): Likewise.
	(streamer_alloc_tree): Likewise.  Update call to make_vector.
	* fold-const.c (fold_ternary_loc): Avoid using VECTOR_CST_ELTS.

gcc/lto/
	* lto.c (compare_tree_sccs_1): Compare the new VECTOR_CST flags.

From-SVN: r255474

Allows functions doing selftests to take parameters with names like
"actual".

2017-12-07  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* selftest.h (ASSERT_TRUE_AT, ASSERT_FALSE_AT, ASSERT_EQ_AT)
	(ASSERT_NE, ASSERT_PRED1): Add underscores to local variable names
	* selftest-rtl.h (ASSERT_RTX_EQ, ASSERT_RTX_PTR_EQ): Likewise.

From-SVN: r255473

	PR tree-optimization/81303
	* Makefile.in (gimple-loop-interchange.o): New object file.
	* common.opt (floop-interchange): Reuse the option from graphite.
	* doc/invoke.texi (-floop-interchange): Ditto.  New document for
	-floop-interchange and mention it for -O3.
	* opts.c (default_options_table): Enable -floop-interchange at -O3.
	* gimple-loop-interchange.cc: New file.
	* params.def (PARAM_LOOP_INTERCHANGE_MAX_NUM_STMTS): New parameter.
	(PARAM_LOOP_INTERCHANGE_STRIDE_RATIO): New parameter.
	* passes.def (pass_linterchange): New pass.
	* timevar.def (TV_LINTERCHANGE): New time var.
	* tree-pass.h (make_pass_linterchange): New declaration.
	* tree-ssa-loop-ivcanon.c (create_canonical_iv): Change to external
	interchange.  Record IV before/after increment in new parameters.
	* tree-ssa-loop-ivopts.h (create_canonical_iv): New declaration.
	* tree-vect-loop.c (vect_is_simple_reduction): Factor out reduction
	path check into...
	(check_reduction_path): ...New function here.
	* tree-vectorizer.h (check_reduction_path): New declaration.

	gcc/testsuite
	* gcc.dg/tree-ssa/loop-interchange-1.c: New test.
	* gcc.dg/tree-ssa/loop-interchange-1b.c: New test.
	* gcc.dg/tree-ssa/loop-interchange-2.c: New test.
	* gcc.dg/tree-ssa/loop-interchange-3.c: New test.
	* gcc.dg/tree-ssa/loop-interchange-4.c: New test.
	* gcc.dg/tree-ssa/loop-interchange-5.c: New test.
	* gcc.dg/tree-ssa/loop-interchange-6.c: New test.
	* gcc.dg/tree-ssa/loop-interchange-7.c: New test.
	* gcc.dg/tree-ssa/loop-interchange-8.c: New test.
	* gcc.dg/tree-ssa/loop-interchange-9.c: New test.
	* gcc.dg/tree-ssa/loop-interchange-10.c: New test.
	* gcc.dg/tree-ssa/loop-interchange-11.c: New test.
	* gcc.dg/tree-ssa/loop-interchange-12.c: New test.
	* gcc.dg/tree-ssa/loop-interchange-13.c: New test.

Co-Authored-By: Richard Biener <rguenther@suse.de>

From-SVN: r255472

2017-12-07  Vladimir Makarov  <vmakarov@redhat.com>

	PR target/83252
	PR rtl-optimization/80818
	* lra.c (add_regs_to_insn_regno_info): Make a hard reg in CLOBBER
	always early clobbered.
	* lra-lives.c (process_bb_lives): Check input hard regs for early
	clobbered non-operand hard reg.

From-SVN: r255471

	PR middle-end/83164
	* tree-cfg.c (verify_gimple_assign_binary): Don't require
	types_compatible_p, just that TYPE_MODE is the same.

	* gcc.c-torture/compile/pr83164.c: New test.

From-SVN: r255470

PR c/81544 - attribute noreturn and warn_unused_result on the same function accepted
PR c/81566 - invalid attribute aligned accepted on functions

gcc/ada/ChangeLog:

	PR c/81544
	* gcc-interface/utils.c (gnat_internal_attribute_table): Initialize
	new member of struct attribute_spec.

gcc/c/ChangeLog:

	PR c/81544
	* c-decl.c (c_decl_attributes): Look up existing declaration and
	pass it to decl_attributes.

gcc/c-family/ChangeLog:

	PR c/81544
	PR c/81566
	* c-attribs.c (attr_aligned_exclusions): New array.
	(attr_alloc_exclusions, attr_cold_hot_exclusions): Same.
	(attr_common_exclusions, attr_const_pure_exclusions): Same.
	(attr_gnu_inline_exclusions, attr_inline_exclusions): Same.
	(attr_noreturn_exclusions, attr_returns_twice_exclusions): Same.
	(attr_warn_unused_result_exclusions): Same.
	(handle_hot_attribute, handle_cold_attribute): Simplify.
	(handle_const_attribute): Warn on function returning void.
	(handle_pure_attribute): Same.
	(handle_aligned_attribute): Diagnose conflicting attribute
	specifications.
	* c-warn.c (diagnose_mismatched_attributes): Simplify.

gcc/cp/ChangeLog:

	PR c/81544
	* cp-tree.h (decls_match): Add default argument.
	* decl.c (decls_match): Avoid calling into the target back end
	and triggering an error.
	* decl2.c (cplus_decl_attributes): Look up existing declaration and
	pass it to decl_attributes.
	* tree.c (cxx_attribute_table): Initialize new member of struct
	attribute_spec.

gcc/fortran/ChangeLog:

	PR c/81544
	* f95-lang.c (gfc_attribute_table): Initialize new member of struct
	attribute_spec.

gcc/lto/ChangeLog:

	PR c/81544
	* lto-lang.c (lto_attribute_table): Initialize new member of struct
	attribute_spec.

gcc/ChangeLog:

	PR c/81544
	* attribs.c (empty_attribute_table): Initialize new member of
	struct attribute_spec.
	(decl_attributes): Add argument.  Handle mutually exclusive
	combinations of attributes.
	(selftests::test_attribute_exclusions): New function.
	(selftests::attribute_c_tests): Ditto.
	* attribs.h (decl_attributes): Add default argument.
	* selftest.h (attribute_c_tests): Declare.
	* selftest-run-tests.c (selftest::run_tests): Call attribute_c_tests.
	* tree-core.h (attribute_spec::exclusions, exclude): New type and
	member.
	* doc/extend.texi (Common Function Attributes): Update const and pure.

gcc/testsuite/ChangeLog:

	PR c/81544
	* c-c++-common/Wattributes-2.c: New test.
	* c-c++-common/Wattributes.c: New test.
	* c-c++-common/attributes-3.c: Adjust.
	* gcc.dg/Wattributes-6.c: New test.
	* gcc.dg/Wattributes-7.c: New test.
	* gcc.dg/attr-noinline.c
	* gcc.dg/pr44964.c: Same.
	* gcc.dg/torture/pr42363.c: Same.
	* gcc.dg/tree-ssa/ssa-ccp-2.c: Same.

From-SVN: r255469

re PR target/82641 (Unable to enable crc32 for a certain function with target attribute on ARM (aarch32))

2017-12-07  Tamar Christina  <tamar.christina@arm.com>

	PR target/82641
	* config/arm/arm.c (INCLUDE_STRING): Define.
	(arm_last_printed_arch_string, arm_last_printed_fpu_string): New.
	(arm_declare_function_name): Conservatively emit .arch, .arch_extensions
	and .fpu.

gcc/testsuite/
2017-12-07  Tamar Christina  <tamar.christina@arm.com>

	PR target/82641
	* gcc.target/arm/pragma_arch_attribute_2.c: New.
	* gcc.target/arm/pragma_arch_attribute_2.c: New.
	* gcc.target/arm/pragma_arch_attribute_3.c: New.
	* gcc.target/arm/pragma_fpu_attribute.c: New.
	* gcc.target/arm/pragma_fpu_attribute_2.c: New.

From-SVN: r255468

	* gimple-loop-jam.c: New file.
	* Makefile.in (OBJS): Add gimple-loop-jam.o.
	* common.opt (funroll-and-jam): New option.
	* opts.c (default_options_table): Add unroll-and-jam at -O3.
	* params.def (PARAM_UNROLL_JAM_MIN_PERCENT): New param.
	(PARAM_UNROLL_JAM_MAX_UNROLL): Ditto.
	* passes.def: Add pass_loop_jam.
	* timevar.def (TV_LOOP_JAM): Add.
	* tree-pass.h (make_pass_loop_jam): Declare.
	* cfgloop.c (flow_loop_tree_node_add): Add AFTER argument.
	* cfgloop.h (flow_loop_tree_node_add): Adjust declaration.
	* cfgloopmanip.c (duplicate_loop): Add AFTER argument, adjust call
	to flow_loop_tree_node_add.
	(duplicate_subloops, copy_loops_to): Append to sibling list.
	* cfgloopmanip.h: (duplicate_loop): Adjust declaration.
	* doc/invoke.texi (-funroll-and-jam): Document new option.
	(unroll-jam-min-percent, unroll-jam-max-unroll): Document new params.

testsuite/
	* gcc.dg/unroll-and-jam.c: New test.

From-SVN: r255467

2017-12-07  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/83296
	PR tree-optimization/67769
	* tree-ssa-phiopt.c (conditional_replacement): Do not reset
	flow sensitive info in an unrelated BB.
	(value_replacement): Use reset_flow_sensitive_info.
	(minmax_replacement): Reset flow sensitive info on the def
	we move.  Do not reset flow sensitive info in the whole BB
	we move the stmt to.
	(abs_replacement): Likewise.

	* g++.dg/warn/Wstringop-overflow-1.C: New testcase.

From-SVN: r255466

Finally, set rs6000_cpu based not on -mtune=, but only -mcpu= and the
defaults.


	PR target/43871
	* config/rs6000/rs6000.c (rs6000_option_override_internal): Set
	rs6000_cpu to the given -mcpu=, or to the default processor.

From-SVN: r255464

In some places in the code we currently use rs6000_cpu_attr, although
that is a cast from rs6000_tune.  This patch changes things to be more
regular and clearer.  Now rs6000_cpu_attr is not used any more, and
it is deleted.


	* config/rs6000/rs6000.h (rs6000_cpu_attr): Delete.
	* config/rs6000/rs6000.c (rs6000_variable_issue_1): Use rs6000_tune
	instead of rs6000_cpu_attr.
	(rs6000_adjust_cost): Ditto.
	(is_microcoded_insn): Ditto.
	(rs6000_adjust_priority): Ditto.
	(rs6000_issue_rate): Ditto.
	(rs6000_use_sched_lookahead): Ditto.
	(rs6000_use_sched_lookahead_guard): Ditto.
	(rs6000_sched_reorder): Ditto.
	(force_new_group): Ditto.
	* config/rs6000/rs6000.md (cpu attribute): Ditto.
	(group_ending_nop): Ditto.

From-SVN: r255463

This splits rs6000_cpu into rs6000_cpu and rs6000_tune.  Both are still
initialised identically, so there is no behaviour change.

Now rs6000_cpu should be set by -mcpu=, and rs6000_tune by -mtune= (but
both still are set by -mtune=, fixed in a later patch in the series).

Also change rs6000_cpu to rs6000_tune in the appropriate cases (i.e.
most, but not those that enable using new insns).


	* config/rs6000/rs6000.opt (rs6000_tune): New variable.
	* config/rs6000/rs6000.c (rs6000_option_override_internal): Also set
	rs6000_tune.  Use rs6000_tune instead of rs6000_cpu where appropriate.
	(rs6000_loop_align): Use rs6000_tune instead of rs6000_cpu where
	appropriate.
	(rs6000_reassociation_width): Ditto.
	(rs6000_emit_epilogue): Ditto.
	(rs6000_adjust_cost): Ditto.
	(is_microcoded_insn): Ditto.
	(is_cracked_insn): Ditto.
	(rs6000_adjust_priority): Ditto.
	(rs6000_sched_reorder): Ditto.
	(rs6000_sched_reorder2): Ditto.
	(insn_must_be_first_in_group): Ditto.
	(insn_must_be_last_in_group): Ditto.
	(rs6000_register_move_cost): Ditto.
	* config/rs6000/rs6000.h (rs6000_cpu_attr): Use rs6000_tune instead of
	rs6000_cpu.

From-SVN: r255462

gcc/
	* config.gcc: Add vaesintrin.h.
	* config/i386/i386-builtin-types.def (V64QI_FTYPE_V64QI_V64QI): New type.
	* config/i386/i386-builtin.def (__builtin_ia32_vaesdec_v16qi,
	__builtin_ia32_vaesdec_v32qi, __builtin_ia32_vaesdec_v64qi): New builtins.
	* config/i386/i386.c (ix86_expand_args_builtin): Handle new type.
	* config/i386/immintrin.h: Include vaesintrin.h.
	* config/i386/sse.md (vaesdec_<mode>): New pattern.
	* config/i386/vaesintrin.h (_mm256_aesdec_epi128, _mm512_aesdec_epi128,
	_mm_aesdec_epi128): New intrinsics.

gcc/testsuite/
	* gcc.target/i386/avx512-check.h: Handle bit_VAES.
	* gcc.target/i386/avx512f-aesdec-2.c: New test.
	* gcc.target/i386/avx512fvl-vaes-1.c: Ditto.
	* gcc.target/i386/avx512vl-aesdec-2.c: Ditto.
	* gcc.target/i386/i386.exp (check_effective_target_avx512vaes): New.

From-SVN: r255461

From-SVN: r255460

	PR tree-optimization/69224
	PR tree-optimization/80907
	PR tree-optimization/82286
	* gcc.dg/pr69224.c: New test.
	* gcc.dg/pr80907.c: New test.
	* gcc.dg/pr82286.c: New test.

From-SVN: r255457

	PR c++/80259
	* decl2.c (grokfield): Diagnose = delete redefinition of a friend.

	* g++.dg/cpp0x/pr80259.C: New test.

From-SVN: r255456

	* call.c (convert_for_arg_passing): Pass NULL_TREE to
	targetm.calls.promote_prototypes.
	(type_passed_as): Likewise.

From-SVN: r255455

	* pt.c (value_dependent_expression_p): Add lval parameter.  Don't
	consider DECL_INITIAL if it's true.

From-SVN: r255454

gcc/c-family/ChangeLog:
	PR c/83236
	* c-common.c (selftest::c_family_tests): Call
	selftest::c_spellcheck_cc_tests.
	* c-common.h (selftest::c_spellcheck_cc_tests): New decl.
	* c-spellcheck.cc: Include "selftest.h".
	(name_reserved_for_implementation_p): New function.
	(should_suggest_as_macro_p): New function.
	(find_closest_macro_cpp_cb): Move the check for NT_MACRO to
	should_suggest_as_macro_p and call it.
	(selftest::test_name_reserved_for_implementation_p): New function.
	(selftest::c_spellcheck_cc_tests): New function.
	* c-spellcheck.h (name_reserved_for_implementation_p): New decl.

gcc/c/ChangeLog:
	PR c/83236
	* c-decl.c (lookup_name_fuzzy): Don't suggest names that are
	reserved for use by the implementation.

gcc/cp/ChangeLog:
	PR c/83236
	* name-lookup.c (consider_binding_level): Don't suggest names that
	are reserved for use by the implementation.

gcc/testsuite/ChangeLog:
	PR c/83236
	* c-c++-common/spellcheck-reserved.c: New test case.

From-SVN: r255453

The code for spellchecking macros really belongs in c-family, rather
than in gcc/spellcheck-tree.c, so this patch moves it there.

gcc/ChangeLog:
	* Makefile.in (C_COMMON_OBJS): Add c-family/c-spellcheck.o.
	* spellcheck-tree.c (find_closest_macro_cpp_cb): Move to
	c-family/c-spellcheck.cc.
	(best_macro_match::best_macro_match): Likewise.
	* spellcheck-tree.h
	(struct edit_distance_traits<cpp_hashnode *>): Move to
	c-family/c-spellcheck.h.
	(class best_macro_match): Likewise.

gcc/c-family/ChangeLog:
	* c-spellcheck.cc: New file, taken from macro-handling code in
	spellcheck-tree.c.
	* c-spellcheck.h: New file, taken from macro-handling code in
	spellcheck-tree.h.

gcc/c/ChangeLog:
	* c-decl.c: Include "c-family/c-spellcheck.h".

gcc/cp/ChangeLog:
	* name-lookup.c: Include "c-family/c-spellcheck.h".

From-SVN: r255452

	PR tree-optimization/83293
	* gimple-ssa-strength-reduction.c (insert_initializers): Use
	GSI_NEW_STMT instead of GSI_SAME_STMT in gsi_insert_after that
	might insert into empty bb.

	* g++.dg/torture/pr83293.C: New test.

From-SVN: r255451

PR testsuite/83303 - FAIL: g++.dg/opt/new1.C on arm-none-eabi
(extra -Walloc-size-larger-than warning

	* g++.dg/opt/new1.C: Prune warning from test output.

From-SVN: r255450

	PR sanitizer/81281
	* match.pd ((T)(P + A) - (T)P -> (T) A): Split into separate
	simplify for plus with :c added, and pointer_plus without that.
	((T)P - (T)(P + A) -> -(T) A): Likewise.  If type is integral
	with undefined overflow and the conversion is not widening,
	perform negation in utype and only convert to type afterwards.
	((T)(P + A) - (T)(P + B) -> (T)A - (T)B): Split into separate
	simplify for plus with :c added, and pointer_plus without that.
	If type is integral with undefined overflow and the conversion is
	not widening, perform minus in utype and only convert to type
	afterwards.  Move the last pointer_diff_expr simplify into the
	two outermost ifs.

	* gcc.c-torture/execute/pr81281.c: New test.
	* gcc.dg/pr81281-1.c: New test.
	* gcc.dg/pr81281-2.c: New test.
	* g++.dg/ubsan/pr81281.C: New test.
	* g++.dg/ubsan/pr81281-aux.cc: New test.

From-SVN: r255449

PR tree-optimization/82646 - bogus -Wstringop-overflow with -D_FORTIFY_SOURCE=2 on strncpy with range to a member array

gcc/ChangeLog:

	PR tree-optimization/82646
	* builtins.c (maybe_emit_chk_warning): Use size as the bound for
	strncpy, not maxlen.

gcc/testsuite/ChangeLog:

	PR tree-optimization/82646
	* gcc.dg/builtin-stringop-chk-1.c: Adjust.
	* gcc.dg/builtin-stringop-chk-9.c: New test.
	* g++.dg/ext/strncpy-chk1.C: Adjust.

From-SVN: r255448

gcc/ChangeLog:

	* doc/invoke.texi (-Wstringop-truncation): Mention attribute
	nonstring.

From-SVN: r255447

gcc/ChangeLog:

	PR tree-optimization/83075
	* tree-ssa-strlen.c (handle_builtin_stxncpy): Avoid assuming
	strncat/strncpy don't change length of source string.

gcc/testsuite/ChangeLog:

	PR tree-optimization/83075
	* gcc.dg/tree-ssa/strncat.c: New test.
	* gcc.dg/tree-ssa/strncpy-2.c: Same.

From-SVN: r255446

    
    Remove -fplan9-extensions from the CFLAGS used for libgo (no
    longer needed since the runtime was converted from C to Go).
    
    Reviewed-on: https://go-review.googlesource.com/82177

From-SVN: r255445

	gcc/testsuite
	* g++.dg/graphite/pr41305.C: Refine test option.
	* gcc.dg/graphite/pr42205-1.c: Ditto.
	* gcc.dg/graphite/pr42205-2.c: Ditto.
	* gcc.dg/graphite/pr42211.c: Ditto.
	* gcc.dg/graphite/pr46185.c: Ditto.
	* gcc.dg/graphite/pr46966.c: Ditto.
	* gcc.dg/graphite/pr59817-1.c: Ditto.
	* gcc.dg/graphite/pr59817-2.c: Ditto.
	* gcc.dg/graphite/pr60740.c: Ditto.
	* gcc.dg/graphite/pr60785.c: Ditto.
	* gcc.dg/graphite/pr68715-2.c: Ditto.
	* gcc.dg/graphite/pr68715.c: Ditto.
	* gcc.dg/graphite/pr70045.c: Ditto.
	* gfortran.dg/graphite/pr14741.f90: Ditto.
	* gfortran.dg/graphite/pr40982.f90: Ditto.
	* gfortran.dg/graphite/pr42285.f90: Ditto.
	* gfortran.dg/graphite/pr42334-1.f: Ditto.
	* gfortran.dg/graphite/pr42334.f90: Ditto.
	* gfortran.dg/graphite/pr43349.f: Ditto.
	* gfortran.dg/graphite/pr59817.f: Ditto.

From-SVN: r255444

gcc/testsuite/ChangeLog:

<date>  Charles Baylis  <charles.baylis@linaro.org>

	* gcc.target/arm/addr-modes-float.c: Place dg-add-options after
       	dg-require-effective-target.
       	(ATTR): New define.
       	(POST_STORE): Pass ATTR as 2nd argument.
       	(POST_LOAD): Likewise.
       	(POST_STORE_VEC): Likewise.
       	* gcc.target/arm/addr-modes-int.c (ATTR): New define.
       	(PRE_STORE): Pass ATTR as 2nd argument.
       	(POST_STORE): Likewise.
       	(PRE_LOAD): Likewise.
       	(POST_LOAD): Likewise.
       	* gcc.target/arm/addr-modes.h:  (PRE_STORE): New parameter.
       	(POST_STORE): Likewise.
       	(POST_STORE_VEC): Likewise.
       	(PRE_LOAD): Likewise.
       	(POST_LOAD): Likewise.
       	(POST_LOAD_VEC): Likewise.

From-SVN: r255443

    
    Change the code in Unary_expression::do_get_backend that introduces
    explicit nil checks for dereference operations to special case
    set-and-use-temporary expressions. For this case it is better to
    generate an explicit reference of the temp in the final conditional
    (avoids introducing tree sharing).
    
    Reviewed-on: https://go-review.googlesource.com/81915

From-SVN: r255442

re PR ada/66205 (gnatbind generates invalid code when finalization is enabled in restricted runtime)

	PR ada/66205
	* bindgen.adb (Gen_AdaFinal): If the restriction No_Task_Termination is
	set, generate a null body.

From-SVN: r255441

	2017-11-29  Martin Aberg  <maberg@gaisler.com>

	* config/sparc/sparc.md (divdf3_fix): Add NOP and adjust length
	to prevent b2bst errata sequence.
	(sqrtdf2_fix): Likewise.

From-SVN: r255439