This patch changes GET_MODE_PRECISION from an unsigned short
to a poly_uint16.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* machmode.h (mode_precision): Change from unsigned short to
	poly_uint16_pod.
	(mode_to_precision): Return a poly_uint16 rather than an unsigned
	short.
	(GET_MODE_PRECISION): Return a constant if ONLY_FIXED_SIZE_MODES,
	or if measurement_type is not polynomial.
	(HWI_COMPUTABLE_MODE_P): Turn into a function.  Optimize the case
	in which the mode is already known to be a scalar_int_mode.
	* genmodes.c (emit_mode_precision): Change the type of mode_precision
	from unsigned short to poly_uint16_pod.  Use ZERO_COEFFS for the
	initializer.
	* lto-streamer-in.c (lto_input_mode_table): Use bp_unpack_poly_value
	for GET_MODE_PRECISION.
	* lto-streamer-out.c (lto_write_mode_table): Use bp_pack_poly_value
	for GET_MODE_PRECISION.
	* combine.c (update_rsp_from_reg_equal): Treat GET_MODE_PRECISION
	as polynomial.
	(try_combine, find_split_point, combine_simplify_rtx): Likewise.
	(expand_field_assignment, make_extraction): Likewise.
	(make_compound_operation_int, record_dead_and_set_regs_1): Likewise.
	(get_last_value): Likewise.
	* convert.c (convert_to_integer_1): Likewise.
	* cse.c (cse_insn): Likewise.
	* expr.c (expand_expr_real_1): Likewise.
	* lra-constraints.c (simplify_operand_subreg): Likewise.
	* optabs-query.c (can_atomic_load_p): Likewise.
	* optabs.c (expand_atomic_load): Likewise.
	(expand_atomic_store): Likewise.
	* ree.c (combine_reaching_defs): Likewise.
	* rtl.h (partial_subreg_p, paradoxical_subreg_p): Likewise.
	* rtlanal.c (nonzero_bits1, lsb_bitfield_op_p): Likewise.
	* tree.h (type_has_mode_precision_p): Likewise.
	* ubsan.c (instrument_si_overflow): Likewise.

gcc/ada/
	* gcc-interface/misc.c (enumerate_modes): Treat GET_MODE_PRECISION
	as polynomial.

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

From-SVN: r256198

This patch changes TYPE_VECTOR_SUBPARTS to a poly_uint64.  The value is
encoded in the 10-bit precision field and was previously always stored
as a simple log2 value.  The challenge was to use this 10 bits to
encode the number of elements in variable-length vectors, so that
we didn't need to increase the size of the tree.

In practice the number of vector elements should always have the form
N + N * X (where X is the runtime value), and as for constant-length
vectors, N must be a power of 2 (even though X itself might not be).
The patch therefore uses the low 8 bits to encode log2(N) and bit
8 to select between constant-length and variable-length vectors.
Targets without variable-length vectors continue to use the old scheme.

A new valid_vector_subparts_p function tests whether a given number
of elements can be encoded.  This is false for the vector modes that
represent an LD3 or ST3 vector triple (which we want to treat as arrays
of vectors rather than single vectors).

Most of the patch is mechanical; previous patches handled the changes
that weren't entirely straightforward.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* tree.h (TYPE_VECTOR_SUBPARTS): Turn into a function and handle
	polynomial numbers of units.
	(SET_TYPE_VECTOR_SUBPARTS): Likewise.
	(valid_vector_subparts_p): New function.
	(build_vector_type): Remove temporary shim and take the number
	of units as a poly_uint64 rather than an int.
	(build_opaque_vector_type): Take the number of units as a
	poly_uint64 rather than an int.
	* tree.c (build_vector_from_ctor): Handle polynomial
	TYPE_VECTOR_SUBPARTS.
	(type_hash_canon_hash, type_cache_hasher::equal): Likewise.
	(uniform_vector_p, vector_type_mode, build_vector): Likewise.
	(build_vector_from_val): If the number of units is variable,
	use build_vec_duplicate_cst for constant operands and
	VEC_DUPLICATE_EXPR otherwise.
	(make_vector_type): Remove temporary is_constant ().
	(build_vector_type, build_opaque_vector_type): Take the number of
	units as a poly_uint64 rather than an int.
	(check_vector_cst): Handle polynomial TYPE_VECTOR_SUBPARTS and
	VECTOR_CST_NELTS.
	* cfgexpand.c (expand_debug_expr): Likewise.
	* expr.c (count_type_elements, categorize_ctor_elements_1): Likewise.
	(store_constructor, expand_expr_real_1): Likewise.
	(const_scalar_mask_from_tree): Likewise.
	* fold-const-call.c (fold_const_reduction): Likewise.
	* fold-const.c (const_binop, const_unop, fold_convert_const): Likewise.
	(operand_equal_p, fold_vec_perm, fold_ternary_loc): Likewise.
	(native_encode_vector, vec_cst_ctor_to_array): Likewise.
	(fold_relational_const): Likewise.
	(native_interpret_vector): Likewise.  Change the size from an
	int to an unsigned int.
	* gimple-fold.c (gimple_fold_stmt_to_constant_1): Handle polynomial
	TYPE_VECTOR_SUBPARTS.
	(gimple_fold_indirect_ref, gimple_build_vector): Likewise.
	(gimple_build_vector_from_val): Use VEC_DUPLICATE_EXPR when
	duplicating a non-constant operand into a variable-length vector.
	* hsa-brig.c (hsa_op_immed::emit_to_buffer): Handle polynomial
	TYPE_VECTOR_SUBPARTS and VECTOR_CST_NELTS.
	* ipa-icf.c (sem_variable::equals): Likewise.
	* match.pd: Likewise.
	* omp-simd-clone.c (simd_clone_subparts): Likewise.
	* print-tree.c (print_node): Likewise.
	* stor-layout.c (layout_type): Likewise.
	* targhooks.c (default_builtin_vectorization_cost): Likewise.
	* tree-cfg.c (verify_gimple_comparison): Likewise.
	(verify_gimple_assign_binary): Likewise.
	(verify_gimple_assign_ternary): Likewise.
	(verify_gimple_assign_single): Likewise.
	* tree-pretty-print.c (dump_generic_node): Likewise.
	* tree-ssa-forwprop.c (simplify_vector_constructor): Likewise.
	(simplify_bitfield_ref, is_combined_permutation_identity): Likewise.
	* tree-vect-data-refs.c (vect_permute_store_chain): Likewise.
	(vect_grouped_load_supported, vect_permute_load_chain): Likewise.
	(vect_shift_permute_load_chain): Likewise.
	* tree-vect-generic.c (nunits_for_known_piecewise_op): Likewise.
	(expand_vector_condition, optimize_vector_constructor): Likewise.
	(lower_vec_perm, get_compute_type): Likewise.
	* tree-vect-loop.c (vect_determine_vectorization_factor): Likewise.
	(get_initial_defs_for_reduction, vect_transform_loop): Likewise.
	* tree-vect-patterns.c (vect_recog_bool_pattern): Likewise.
	(vect_recog_mask_conversion_pattern): Likewise.
	* tree-vect-slp.c (vect_supported_load_permutation_p): Likewise.
	(vect_get_constant_vectors, vect_transform_slp_perm_load): Likewise.
	* tree-vect-stmts.c (perm_mask_for_reverse): Likewise.
	(get_group_load_store_type, vectorizable_mask_load_store): Likewise.
	(vectorizable_bswap, simd_clone_subparts, vectorizable_assignment)
	(vectorizable_shift, vectorizable_operation, vectorizable_store)
	(vectorizable_load, vect_is_simple_cond, vectorizable_comparison)
	(supportable_widening_operation): Likewise.
	(supportable_narrowing_operation): Likewise.
	* tree-vector-builder.c (tree_vector_builder::binary_encoded_nelts):
	Likewise.
	* varasm.c (output_constant): Likewise.

gcc/ada/
	* gcc-interface/utils.c (gnat_types_compatible_p): Handle
	polynomial TYPE_VECTOR_SUBPARTS.

gcc/brig/
	* brigfrontend/brig-to-generic.cc (get_unsigned_int_type): Handle
	polynomial TYPE_VECTOR_SUBPARTS.
	* brigfrontend/brig-util.h (gccbrig_type_vector_subparts): Likewise.

gcc/c-family/
	* c-common.c (vector_types_convertible_p, c_build_vec_perm_expr)
	(convert_vector_to_array_for_subscript): Handle polynomial
	TYPE_VECTOR_SUBPARTS.
	(c_common_type_for_mode): Check valid_vector_subparts_p.
	* c-pretty-print.c (pp_c_initializer_list): Handle polynomial
	VECTOR_CST_NELTS.

gcc/c/
	* c-typeck.c (comptypes_internal, build_binary_op): Handle polynomial
	TYPE_VECTOR_SUBPARTS.

gcc/cp/
	* constexpr.c (cxx_eval_array_reference): Handle polynomial
	VECTOR_CST_NELTS.
	(cxx_fold_indirect_ref): Handle polynomial TYPE_VECTOR_SUBPARTS.
	* call.c (build_conditional_expr_1): Likewise.
	* decl.c (cp_finish_decomp): Likewise.
	* mangle.c (write_type): Likewise.
	* typeck.c (structural_comptypes): Likewise.
	(cp_build_binary_op): Likewise.
	* typeck2.c (process_init_constructor_array): Likewise.

gcc/fortran/
	* trans-types.c (gfc_type_for_mode): Check valid_vector_subparts_p.

gcc/lto/
	* lto-lang.c (lto_type_for_mode): Check valid_vector_subparts_p.
	* lto.c (hash_canonical_type): Handle polynomial TYPE_VECTOR_SUBPARTS.

gcc/go/
	* go-lang.c (go_langhook_type_for_mode): Check valid_vector_subparts_p.

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

From-SVN: r256197

The GET_MODE_NUNITS patch made vect_grouped_store_supported and
vect_grouped_load_supported check for a constant number of elements,
so vect_permute_store_chain and vect_permute_load_chain can assert
for that.  This patch adds commentary to that effect; the actual
asserts will be added by a later, more mechanical, patch.

The patch also reorganises the function so that the asserts
are linked specifically to code that builds permute vectors
element-by-element.  This allows a later patch to add support
for some variable-length permutes.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* tree-vect-data-refs.c (vect_permute_store_chain): Reorganize
	so that both the length == 3 and length != 3 cases set up their
	own permute vectors.  Add comments explaining why we know the
	number of elements is constant.
	(vect_permute_load_chain): Likewise.

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

From-SVN: r256196

This patch changes GET_MODE_NUNITS from unsigned char
to poly_uint16, although it remains a macro when compiling
target code with NUM_POLY_INT_COEFFS == 1.

We can handle permuted loads and stores for variable nunits if
the number of statements is a power of 2, but not otherwise.

The to_constant call in make_vector_type goes away in a later patch.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* machmode.h (mode_nunits): Change from unsigned char to
	poly_uint16_pod.
	(ONLY_FIXED_SIZE_MODES): New macro.
	(pod_mode::measurement_type, scalar_int_mode::measurement_type)
	(scalar_float_mode::measurement_type, scalar_mode::measurement_type)
	(complex_mode::measurement_type, fixed_size_mode::measurement_type):
	New typedefs.
	(mode_to_nunits): Return a poly_uint16 rather than an unsigned short.
	(GET_MODE_NUNITS): Return a constant if ONLY_FIXED_SIZE_MODES,
	or if measurement_type is not polynomial.
	* genmodes.c (ZERO_COEFFS): New macro.
	(emit_mode_nunits_inline): Make mode_nunits_inline return a
	poly_uint16.
	(emit_mode_nunits): Change the type of mode_nunits to poly_uint16_pod.
	Use ZERO_COEFFS when emitting initializers.
	* data-streamer.h (bp_pack_poly_value): New function.
	(bp_unpack_poly_value): Likewise.
	* lto-streamer-in.c (lto_input_mode_table): Use bp_unpack_poly_value
	for GET_MODE_NUNITS.
	* lto-streamer-out.c (lto_write_mode_table): Use bp_pack_poly_value
	for GET_MODE_NUNITS.
	* tree.c (make_vector_type): Remove temporary shim and make
	the real function take the number of units as a poly_uint64
	rather than an int.
	(build_vector_type_for_mode): Handle polynomial nunits.
	* dwarf2out.c (loc_descriptor, add_const_value_attribute): Likewise.
	* emit-rtl.c (const_vec_series_p_1): Likewise.
	(gen_rtx_CONST_VECTOR): Likewise.
	* fold-const.c (test_vec_duplicate_folding): Likewise.
	* genrecog.c (validate_pattern): Likewise.
	* optabs-query.c (can_vec_perm_var_p, can_mult_highpart_p): Likewise.
	* optabs-tree.c (expand_vec_cond_expr_p): Likewise.
	* optabs.c (expand_vector_broadcast, expand_binop_directly): Likewise.
	(shift_amt_for_vec_perm_mask, expand_vec_perm_var): Likewise.
	(expand_vec_cond_expr, expand_mult_highpart): Likewise.
	* rtlanal.c (subreg_get_info): Likewise.
	* tree-vect-data-refs.c (vect_grouped_store_supported): Likewise.
	(vect_grouped_load_supported): Likewise.
	* tree-vect-generic.c (type_for_widest_vector_mode): Likewise.
	* tree-vect-loop.c (have_whole_vector_shift): Likewise.
	* simplify-rtx.c (simplify_unary_operation_1): Likewise.
	(simplify_const_unary_operation, simplify_binary_operation_1)
	(simplify_const_binary_operation, simplify_ternary_operation)
	(test_vector_ops_duplicate, test_vector_ops): Likewise.
	(simplify_immed_subreg): Use GET_MODE_NUNITS on a fixed_size_mode
	instead of CONST_VECTOR_NUNITS.
	* varasm.c (output_constant_pool_2): Likewise.
	* rtx-vector-builder.c (rtx_vector_builder::build): Only include the
	explicit-encoded elements in the XVEC for variable-length vectors.

gcc/ada/
	* gcc-interface/misc.c (enumerate_modes): Handle polynomial
	GET_MODE_NUNITS.

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

From-SVN: r256195

Use partial_subreg_p in code that was added since the initial patch
that introduced this function.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* lra-constraints.c (curr_insn_transform): Use partial_subreg_p.

From-SVN: r256194

This patch adds a POD version of fixed_size_mode.  The only current use
is for storing the __builtin_apply and __builtin_result register modes,
which were made fixed_size_modes by the previous patch.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* coretypes.h (fixed_size_mode): Declare.
	(fixed_size_mode_pod): New typedef.
	* builtins.h (target_builtins::x_apply_args_mode)
	(target_builtins::x_apply_result_mode): Change type to
	fixed_size_mode_pod.
	* builtins.c (apply_args_size, apply_result_size, result_vector)
	(expand_builtin_apply_args_1, expand_builtin_apply)
	(expand_builtin_return): Update accordingly.

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

From-SVN: r256193

This patch makes some pieces of code operate directly on the new
CONST_VECTOR encoding.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* cse.c (hash_rtx_cb): Hash only the encoded elements.
	* cselib.c (cselib_hash_rtx): Likewise.
	* expmed.c (make_tree): Build VECTOR_CSTs directly from the
	CONST_VECTOR encoding.

From-SVN: r256192

	PR target/83641
	* config/i386/i386.c (ix86_adjust_stack_and_probe_stack_clash): For
	noreturn probe, use gen_pop instead of ix86_emit_restore_reg_using_pop,
	only set RTX_FRAME_RELATED_P on both the push and pop if cfa_reg is sp
	and add REG_CFA_ADJUST_CFA notes in that case to both insns.

	PR target/83641
	* config/i386/i386.c (ix86_adjust_stack_and_probe_stack_clash): Do not
	explicitly probe *sp in a noreturn function if there were any callee
	register saves or frame pointer is needed.

	PR target/83641
	* gcc.target/i386/stack-check-17.c: New test.
	* gcc.target/i386/stack-check-12.c: Drop unnecessary asm.

From-SVN: r256191

	PR debug/83621
	* cfgexpand.c (expand_debug_expr): Return NULL if mode is
	BLKmode for ternary, binary or unary expressions.

	* gcc.dg/pr83621.c: New test.

From-SVN: r256190

	PR debug/83645
	* var-tracking.c (delete_vta_debug_insn): New inline function.
	(delete_vta_debug_insns): Add USE_CFG argument, if true, walk just
	insns from get_insns () to NULL instead of each bb separately.
	Use delete_vta_debug_insn.  No longer static.
	(vt_debug_insns_local, variable_tracking_main_1): Adjust
	delete_vta_debug_insns callers.
	* rtl.h (delete_vta_debug_insns): Declare.
	* final.c (rest_of_handle_final): Call delete_vta_debug_insns
	instead of variable_tracking_main.

	* gcc.dg/pr83645.c: New test.

From-SVN: r256189

PR c/83559 - -Wsuggest-attribute=const conflicts with -Wattributes warning about const attribute on function returning void

gcc/ChangeLog:

	PR c/83559
	* doc/extend.texi (attribute const): Fix a typo.
	* ipa-pure-const.c ((warn_function_const, warn_function_pure): Avoid
	issuing -Wsuggest-attribute for void functions.

gcc/testsuite/ChangeLog:

	PR c/83559
	* gcc.dg/const-2.c: New test.
	* gcc.dg/pure-3.c: New test.

From-SVN: r256188

gimple-ssa-warn-restrict.c (builtin_memref::builtin_memref): Use offset_int::from instead of wide_int::to_shwi.


gcc/ChangeLog:

	* gimple-ssa-warn-restrict.c (builtin_memref::builtin_memref): Use
	offset_int::from instead of wide_int::to_shwi.
	(maybe_diag_overlap): Remove assertion.
	Use HOST_WIDE_INT_PRINT_DEC instead of %lli.
	* gimple-ssa-sprintf.c (format_directive): Same.
	(parse_directive): Same.
	(sprintf_dom_walker::compute_format_length): Same.
	(try_substitute_return_value): Same.

gcc/testsuite/ChangeLog:

	* gcc.dg/Wrestrict-3.c: New test.

From-SVN: r256187

	PR c++/83555
	* typeck.c (build_static_cast_1): For static casts to reference types,
	call build_base_path with flag_delete_null_pointer_checks as nonnull
	instead of always false.  When -fsanitize=null, call
	ubsan_maybe_instrument_reference on the NULL reference INTEGER_CST.
	* cp-gimplify.c (cp_genericize_r): Don't walk subtrees of UBSAN_NULL
	call if the first argument is INTEGER_CST with REFERENCE_TYPE.

	* g++.dg/opt/pr83555.C: New test.
	* g++.dg/ubsan/pr83555.C: New test.

From-SVN: r256186

* include/std/optional: Use the feature macro.

From-SVN: r256185

gcc/testsuite/ChangeLog:
	* gcc.dg/plugin/expensive-selftests-1.c: Update regexp to handle
	the !CHECKING_P case by expecting a note.
	* gcc.dg/plugin/expensive_selftests_plugin.c (plugin_init): Issue
	a note for the !CHECKING_P case, and move the return statement
	outside of #if CHECKING_P guard.

From-SVN: r256183

re PR middle-end/83654 (-fstack-clash-protection probes below the stack pointer for VLA with constant size)

	PR middle-end/83654
	* explow.c (anti_adjust_stack_and_probe_stack_clash): Test a
	non-constant residual for zero at runtime and avoid probing in
	that case.  Reorganize code for trailing problem to mirror handling
	of the residual.

	PR middle-end/83654
	* gcc.target/i386/stack-check-18.c: New test.
	* gcc.target/i386/stack-check-19.c: New test.

From-SVN: r256182

gcc/testsuite/ChangeLog:
	* c-c++-common/Warray-bounds-3.c: Remove xfail.

From-SVN: r256181

2018-01-03  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>

	PR tree-optimization/83501
	* tree-ssa-strlen.c (get_string_cst): New.
	(handle_char_store): Call get_string_cst.

testsuite/
	* gcc.dg/tree-ssa/pr83501.c: New test.

From-SVN: r256180

https://gcc.gnu.org/ml/gcc-patches/2018-01/msg00148.html
	PR c++/83667
	* method.c (make_alias_for): Copy DECL_CONTEXT.

	PR c++/83667
	* g++.dg/ipa/pr83667.C: New.

From-SVN: r256179

2018-01-03  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/83593
	* tree-ssa-strlen.c: Include tree-cfg.h.
	(strlen_check_and_optimize_stmt): Add new argument cleanup_eh.
	(strlen_dom_walker): Add new member variable m_cleanup_cfg.
	(strlen_dom_walker::strlen_dom_walker): Initialize m_cleanup_cfg
	to false.
	(strlen_dom_walker::before_dom_children): Call
	gimple_purge_dead_eh_edges. Dump tranformation with details
	dump flags.
	(strlen_dom_walker::before_dom_children): Update call by adding
	new argument cleanup_eh.
	(pass_strlen::execute): Return TODO_cleanup_cfg if needed.
2018-01-03  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/83593
	* gcc.dg/pr83593.c: New test.

From-SVN: r256178

2018-01-03  Martin Liska  <mliska@suse.cz>

	PR ipa/83549
	* cif-code.def (VARIADIC_THUNK): New enum value.
	* ipa-fnsummary.c (compute_fn_summary): Do not inline variadic
	thunks.
2018-01-03  Martin Liska  <mliska@suse.cz>

	PR ipa/83549
	* g++.dg/ipa/pr83549.C: New test.

From-SVN: r256177

	PR c++/83592
	* decl.c (grokdeclarator): Don't warn about MVP in typename context.

	* g++.dg/warn/mvp2.C: New test.

From-SVN: r256176

	PR preprocessor/83602
	* name-lookup.c (lookup_name_fuzzy): Don't use macro_use_before_def
	for builtin macros.

	* g++.dg/cpp/pr83602.C: New test.

From-SVN: r256175

	PR c++/83634
	* cp-gimplify.c (cp_fold) <case NOP_EXPR>: If the operand folds to
	error_mark_node, return error_mark_node.

	* g++.dg/parse/pr83634.C: New test.

From-SVN: r256174

2018-01-03  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/83664
	* check.c (gfc_check_eoshift): Error for missing boundary if array
	is not one of the standard types.

2018-01-03  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/83664
	* gfortran.dg/eoshift_7.f90: New test.

From-SVN: r256171

Simply mirror the MODE_XI logic of handling unaligned operands in
mov<mode>_internal into MODE_TI / MODE_OI handling.

gcc/
2018-01-03  Jan Beulich  <jbeulich@suse.com>

	* sse.md (mov<mode>_internal): Tighten condition for when to use
	vmovdqu<ssescalarsize> for TI and OI modes.

gcc/testsuite/
2018-01-03  Jan Beulich  <jbeulich@suse.com>

	* gcc.target/i386/avx512vl-no-vmovdqu8.c,
	gcc.target/i386/avx512vl-no-vmovdqu16.c: New.

From-SVN: r256170

From-SVN: r256169

From-SVN: r256168

2018-01-03  Martin Liska  <mliska@suse.cz>

	PR ipa/83594
	* ipa-visibility.c (function_and_variable_visibility): Skip
	functions with noipa attribure.
2018-01-03  Martin Liska  <mliska@suse.cz>

	PR ipa/83594
	* gcc.dg/ipa/pr83594.c: New test.

From-SVN: r256167

gcc/
	* gcc.c (process_command): Update copyright notice dates.
	* gcov-dump.c (print_version): Ditto.
	* gcov.c (print_version): Ditto.
	* gcov-tool.c (print_version): Ditto.
	* gengtype.c (create_file): Ditto.
	* doc/cpp.texi: Bump @copying's copyright year.
	* doc/cppinternals.texi: Ditto.
	* doc/gcc.texi: Ditto.
	* doc/gccint.texi: Ditto.
	* doc/gcov.texi: Ditto.
	* doc/install.texi: Ditto.
	* doc/invoke.texi: Ditto.
gcc/fortran/
	* gfortranspec.c (lang_specific_driver): Update copyright notice
	dates.
	* gfc-internals.texi: Bump @copying's copyright year.
	* gfortran.texi: Ditto.
	* intrinsic.texi: Ditto.
	* invoke.texi: Ditto.
gcc/ada/
 	* gnat_ugn.texi: Bump @copying's copyright year.
 	* gnat_rm.texi: Likewise.
gcc/go/
	* gccgo.texi: Bump @copyrights-go year.
libitm/
	* libitm.texi: Bump @copying's copyright year.
libgomp/
	* libgomp.texi: Bump @copying's copyright year.
libquadmath/
	* libquadmath.texi: Bump @copying's copyright year.

From-SVN: r256166

This patch changes the number of elements in a vector being built
by a vector_builder from unsigned int to poly_uint64.  The case
in which it isn't a constant is the one that motivated adding
the vector encoding in the first place.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* vector-builder.h (vector_builder::m_full_nelts): Change from
	unsigned int to poly_uint64.
	(vector_builder::full_nelts): Update prototype accordingly.
	(vector_builder::new_vector): Likewise.
	(vector_builder::encoded_full_vector_p): Handle polynomial full_nelts.
	(vector_builder::operator ==): Likewise.
	(vector_builder::finalize): Likewise.
	* int-vector-builder.h (int_vector_builder::int_vector_builder):
	Take the number of elements as a poly_uint64 rather than an
	unsigned int.
	* vec-perm-indices.h (vec_perm_indices::m_nelts_per_input): Change
	from unsigned int to poly_uint64.
	(vec_perm_indices::vec_perm_indices): Update prototype accordingly.
	(vec_perm_indices::new_vector): Likewise.
	(vec_perm_indices::length): Likewise.
	(vec_perm_indices::nelts_per_input): Likewise.
	(vec_perm_indices::input_nelts): Likewise.
	* vec-perm-indices.c (vec_perm_indices::new_vector): Take the
	number of elements per input as a poly_uint64 rather than an
	unsigned int.  Use the original encoding for variable-length
	vectors, rather than clamping each individual element.
	For the second and subsequent elements in each pattern,
	clamp the step and base before clamping their sum.
	(vec_perm_indices::series_p): Handle polynomial element counts.
	(vec_perm_indices::all_in_range_p): Likewise.
	(vec_perm_indices_to_tree): Likewise.
	(vec_perm_indices_to_rtx): Likewise.
	* tree-vect-stmts.c (vect_gen_perm_mask_any): Likewise.
	* tree-vector-builder.c (tree_vector_builder::new_unary_operation)
	(tree_vector_builder::new_binary_operation): Handle polynomial
	element counts.  Return false if we need to know the number
	of elements at compile time.
	* fold-const.c (fold_vec_perm): Punt if the number of elements
	isn't known at compile time.

From-SVN: r256165

This patch changes the vec_perm_indices element type from HOST_WIDE_INT
to poly_int64, so that it can represent indices into a variable-length
vector.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* vec-perm-indices.h (vec_perm_builder): Change element type
	from HOST_WIDE_INT to poly_int64.
	(vec_perm_indices::element_type): Update accordingly.
	(vec_perm_indices::clamp): Handle polynomial element_types.
	* vec-perm-indices.c (vec_perm_indices::series_p): Likewise.
	(vec_perm_indices::all_in_range_p): Likewise.
	(tree_to_vec_perm_builder): Check for poly_int64 trees rather
	than shwi trees.
	* vector-builder.h (vector_builder::stepped_sequence_p): Handle
	polynomial vec_perm_indices element types.
	* int-vector-builder.h (int_vector_builder::equal_p): Likewise.
	* fold-const.c (fold_vec_perm): Likewise.
	* optabs.c (shift_amt_for_vec_perm_mask): Likewise.
	* tree-vect-generic.c (lower_vec_perm): Likewise.
	* tree-vect-slp.c (vect_transform_slp_perm_load): Likewise.
	* config/aarch64/aarch64.c (aarch64_evpc_tbl): Cast d->perm
	element type to HOST_WIDE_INT.

From-SVN: r256164

The xsize and ysize arguments to memrefs_conflict_p are encode such
that:

- 0 means the size is unknown
- >0 means the size is known
- <0 means that the negative of the size is a worst-case size after
  alignment

In other words, the sign effectively encodes a boolean; it isn't
meant to be taken literally.  With poly_ints these correspond to:

- must_eq (..., 0)
- may_gt (..., 0)
- may_lt (..., 0)

respectively.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* alias.c (addr_side_effect_eval): Take the size as a poly_int64
	rather than an int.  Use plus_constant.
	(memrefs_conflict_p): Take the sizes as poly_int64s rather than ints.
	Take the offset "c" as a poly_int64 rather than a HOST_WIDE_INT.

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

From-SVN: r256163

This patch makes calls.c treat struct_value_size (one of the
operands to a call pattern) as polynomial.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* calls.c (emit_call_1, expand_call): Change struct_value_size from
	a HOST_WIDE_INT to a poly_int64.

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

From-SVN: r256162

This patch makes load_register_parameters cope with polynomial sizes.
The requirement here is that any register parameters with non-constant
sizes must either have a specific mode (e.g. a variable-length vector
mode) or must be represented with a PARALLEL.  This is in practice
already a requirement for parameters passed in vector registers,
since the default behaviour of splitting parameters into words doesn't
make sense for them.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* calls.c (load_register_parameters): Cope with polynomial
	mode sizes.  Require a constant size for BLKmode parameters
	that aren't described by a PARALLEL.  If BLOCK_REG_PADDING
	forces a parameter to be padded at the lsb end in order to
	fill a complete number of words, require the parameter size
	to be ordered wrt UNITS_PER_WORD.

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

From-SVN: r256161

This patch makes alter_reg cope with polynomial mode sizes.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* reload1.c (spill_stack_slot_width): Change element type
	from unsigned int to poly_uint64_pod.
	(alter_reg): Treat mode sizes as polynomial.

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

From-SVN: r256160

This patch splits out a condition that is common to both push_reload
and reload_inner_reg_of_subreg.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* reload.c (complex_word_subreg_p): New function.
	(reload_inner_reg_of_subreg, push_reload): Use it.

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

From-SVN: r256159

This patch makes process_alt_operands check that the mode sizes
are ordered, so that match_reload can validly treat them as subregs
of one another.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* lra-constraints.c (process_alt_operands): Reject matched
	operands whose sizes aren't ordered.
	(match_reload): Refer to this check here.

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

From-SVN: r256158

This patch makes the mode size assumptions in
expand_ifn_atomic_compare_exchange_into_call a bit more
explicit, so that a later patch can add a to_constant () call.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* builtins.c (expand_ifn_atomic_compare_exchange_into_call): Assert
	that the mode size is in the set {1, 2, 4, 8, 16}.

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

From-SVN: r256157

This patch makes the var-tracking.c handling of autoinc addresses
cope with polynomial mode sizes.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* var-tracking.c (adjust_mems): Treat mode sizes as polynomial.
	Use plus_constant instead of gen_rtx_PLUS.

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

From-SVN: r256156