The frame code uses a mixture of gen_rtx_MEM and gen_frame_mem for
callee-saves.  Callee-saves never alias with local variables, so using
gen_frame_mem is best.

    gcc/
	* config/aarch64/aarch64.c (aarch64_pushwb_single_reg):
	Use gen_frame_mem.
	(aarch64_pop_regs): Likewise.
	(aarch64_gen_load_pair): Likewise.
	(aarch64_save_callee_saves): Likewise.
	(aarch64_restore_callee_saves): Likewise.

From-SVN: r250919

Build only if pre-increment is supported.  Given there is no config test,
add a list of targets which have HAVE_PRE_INCREMENT set.

    testsuite/
	PR middle-end/46932
	* gcc.dg/pr46932.c: Compile on targets with pre-increment.

From-SVN: r250918

From-SVN: r250917

When there is no stack access, there is no need to use frame pointer
even if -fno-omit-frame-pointer is used.

gcc/

	PR target/81736
	* config/i386/i386.c (ix86_finalize_stack_realign_flags): Renamed
	to ...
	(ix86_finalize_stack_frame_flags): This.  Also clear
	frame_pointer_needed if -fno-omit-frame-pointer is used without
	stack access.
	(ix86_expand_prologue): Replace ix86_finalize_stack_realign_flags
	with ix86_finalize_stack_frame_flags.
	(ix86_expand_epilogue): Likewise.
	(ix86_expand_split_stack_prologue): Likewise.

gcc/testsuite/

	PR target/81736
	* gcc.target/i386/pr81736-1.c: New test.
	* gcc.target/i386/pr81736-2.c: Likewise.
	* gcc.target/i386/pr81736-3.c: Likewise.
	* gcc.target/i386/pr81736-4.c: Likewise.

From-SVN: r250916

The difference between Nehalem and Westmere is AES.  We should set
priority to P_AES for Westmere, not P_PROC_SSE4_2 which is for Nehalem.
Otherwise, we will pick Nehalem implementation on Westmere.  Tested on
Westmere.

	PR target/81743
	* config/i386/i386.c (get_builtin_code_for_version): Set priority
	to P_AES for Westmere.

From-SVN: r250915

This patch is in use by Cygwin for years, upstream to GCC.

	* gcc/config/i386/mingw.opt (fset-stack-executable): Removed.
	* gcc/config/i386/cygming.opt (fset-stack-executable): Moved
	from mingw.opt.
	* gcc/config/i386/cygwin.h: Define CHECK_EXECUTE_STACK_ENABLED.
	* ligcc/config.host (*-cygwin): Include file from mingw
	config/i386/enable-execute-stack-mingw32.c

From-SVN: r250914

Slim RTL dumps print the RTL code NOT as !, but that is misleading:
its semantics are like the C operator ~.  This fixes it.


	* print-rtl.c (print_exp): Print NOT as "~" instead of as "!".

From-SVN: r250913

	PR middle-end/81737
	* fold-const.c (fold_indirect_ref_1): Check type_domain.

	* gcc.dg/pr81737.c: New test.

From-SVN: r250912

2017-08-07  Martin Liska  <mliska@suse.cz>

	* attribs.h (canonicalize_attr_name): New function.
	(cmp_attribs): Move from c-format.c and adjusted.
	(is_attribute_p): Moved from tree.h.
	* tree-inline.c: Add new includes.
	* tree.c (cmp_attrib_identifiers): Use cmp_attribs.
	(private_is_attribute_p): Remove.
	(private_lookup_attribute): Likewise.
	(private_lookup_attribute_by_prefix): Simplify.
	(remove_attribute): Use is_attribute_p.
	* tree.h: Remove removed declarations.
2017-08-07  Martin Liska  <mliska@suse.cz>

	* array-notation-common.c: Add new includes.
	* c-format.c( handle_format_attribute): Canonicalize a format
	function name.
	* c-lex.c (c_common_has_attribute): Canonicalize name of an
	attribute.
	* c-pretty-print.c: Add new include.
2017-08-07  Martin Liska  <mliska@suse.cz>

	* parser.c (cp_parser_gnu_attribute_list): Canonicalize name of an
	attribute.
	(cp_parser_std_attribute): Likewise.
	* tree.c: Add new include.
2017-08-07  Martin Liska  <mliska@suse.cz>

	* c-parser.c (c_parser_attributes): Canonicalize name of an
	attribute.
2017-08-07  Martin Liska  <mliska@suse.cz>

	* go-gcc.cc (Gcc_backend::function): Look up for no_split_stack
	and not __no_split_stack__.
2017-08-07  Martin Liska  <mliska@suse.cz>

	* g++.dg/cpp0x/pr65558.C: Update scanned pattern.
	* gcc.dg/parm-impl-decl-1.c: Likewise.
	* gcc.dg/parm-impl-decl-3.c: Likewise.
	* gcc.dg/Wattributes-5.c: New test.

From-SVN: r250911

From-SVN: r250910

	PR middle-end/81698
	* stmt.c (emit_case_dispatch_table): Add DEFAULT_EDGE argument,
	instead of computing it in the function.  Formatting fix.
	(expand_case): Don't rely on default_edge being the first edge,
	clear it if removing it, pass default_edge to
	emit_case_dispatch_table.
	(expand_sjlj_dispatch_table): Pass NULL as DEFAULT_EDGE, formatting
	fix.

From-SVN: r250909

From-SVN: r250908

2017-08-06  Andrew Pinski  <apinski@cavium.com>

        * gcc.target/aarch64/target_attr_10.c: Add -mcpu=generic.
        * gcc.target/aarch64/target_attr_13.c: LIkewise.
        * gcc.target/aarch64/target_attr_15.c: LIkewise.
        * gcc.target/aarch64/target_attr_4.c: Likewise.
        * gcc.target/aarch64/target_attr_1.c: Add -march=armv8-a.
        * gcc.target/aarch64/target_attr_2.c: Likewise.
        * gcc.target/aarch64/target_attr_7.c: Likewise.
        * gcc.target/aarch64/target_attr_crypto_ice_1.c: Likewise.
        * gcc.target/aarch64/target_attr_crypto_ice_2.c: Likewise.
        * gcc.target/aarch64/target_attr_3.c: Add -mcpu=generic -march=armv8-a.

From-SVN: r250904

2017-08-06  Andrew Pinski  <apinski@cavium.com>

        * gcc.target/aarch64/atomic_cmp_exchange_zero_reg_1.c: Pass
        -march=armv8-a+nolse, skip if -mcpu= is passed.
        * gcc.target/aarch64/atomic_cmp_exchange_zero_strong_1.c: Likewise.

From-SVN: r250903

2017-08-06  Andrew Pinski  <apinski@cavium.com>

        * gcc.target/aarch64/_Float16_1.c: Skip if supplied a -mcpu= option.
        * gcc.target/aarch64/_Float16_2.c: Likewise.
        * gcc.target/aarch64/_Float16_3.c: Likewise.

From-SVN: r250902

	* config/alpha/alpha.c (alpha_reorg): If trap is the last active
	insn in the function, emit NOP after the insn.

From-SVN: r250901

 ;;   basic block 11, loop depth 2, freq 0, maybe hot
 ;;    prev block 22, next block 23, flags: (NEW, REACHABLE)
 ;;    pred:       22 (TRUE_VALUE)
 ;;                24 (TRUE_VALUE)
   ...
   if (.e_offset.15D.1971 < .e_bound.14D.1972)
-    goto <bb 23>; [100.00%] [count: INV]
+    goto <bb 23>; [80.01%] [count: INV]
   else
-    goto <bb 24>; [INV] [count: INV]
+    goto <bb 24>; [19.99%] [count: INV]

 ;;   basic block 23, loop depth 3, freq 0, maybe hot
 ;;    prev block 11, next block 24, flags: (NEW)
 ;;    pred:       11 [always]  (TRUE_VALUE)
 ;;                23 (TRUE_VALUE)
   ixD.1974 = .outer.4D.1967 + .e_offset.15D.1971;
   .e_offset.15D.1971 = .e_offset.15D.1971 + .e_step.16D.1973;
   if (.e_offset.15D.1971 < .e_bound.14D.1972)
-    goto <bb 23>; [INV] [count: INV]
+    goto <bb 23>; [80.01%] [count: INV]
   else
-    goto <bb 24>; [100.00%] [count: INV]
+    goto <bb 24>; [19.99%] [count: INV]

2017-08-06  Tom de Vries  <tom@codesourcery.com>

	* omp-expand.c (expand_oacc_for): Add missing edge probability for tile
	and element loops.

From-SVN: r250900

 ;;   basic block 10, loop depth 1, freq 0, maybe hot
 ;;    prev block 9, next block 19, flags: (NEW, REACHABLE)
 ;;    pred:       18 (FALSE_VALUE)
 ;;                9 (FALSE_VALUE)
   GIMPLE_NOP
   .chunk_no.7D.1948 = .chunk_no.7D.1948 + 1;
   if (.chunk_no.7D.1948 < .chunk_max.6D.1949)
-    goto <bb 18>; [INV] [count: INV]
+    goto <bb 18>; [80.01%] [count: INV]
   else
-    goto <bb 19>; [100.00%] [count: INV]
+    goto <bb 19>; [19.99%] [count: INV]

2017-08-06  Tom de Vries  <tom@codesourcery.com>

	* omp-expand.c (expand_oacc_for): Add missing edge probability for chunk
	loop.

From-SVN: r250899

2017-08-06  Tom de Vries  <tom@codesourcery.com>

	* gcc.dg/pr78582.c: Require effective target nonlocal_goto.

From-SVN: r250898

2017-08-06  Tom de Vries  <tom@codesourcery.com>

	* gcc.c-torture/execute/builtins/memops-asm-lib.c (my_memmove):  Fix return
	type.  Add missing return.

From-SVN: r250897

2017-08-06  Tom de Vries  <tom@codesourcery.com>

	PR testsuite/81731
	* gcc.dg/torture/pr78218.c (struct v): New type, factored type out of
	variable 'a' definition.
	(b): Remove unused variable.
	(gp): New variable.
	(check): Add parameter corresponding to call in main, and handle.

From-SVN: r250896

From-SVN: r250894

	* c-ada-spec.c (has_static_fields): Look only into variables.
	(print_constructor): Add TYPE parameter and use it for the name.
	(print_destructor): Likewise.
	(print_ada_declaration): Adjust to new constructor/destructor names.
	Adjust calls to print_constructor and print_destructor.
	(print_ada_struct_decl): Do not test TREE_STATIC on FIELD_DECL.
	Look only into variables in the final loop.

From-SVN: r250890

From-SVN: r250889

gcc/po:
	* gcc.pot: Regenerate.

libcpp/po:
	* cpplib.pot: Regenerate.

From-SVN: r250885

/cp
2017-08-04  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/79790
	* pt.c (do_class_deduction): Handle the case of no viable implicit
	deduction guides; simplify the code generating implicit deduction
	guides.

/testsuite
2017-08-04  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/79790
	* g++.dg/cpp1z/class-deduction42.C: New.

From-SVN: r250883

/cp
2017-08-04  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/79790
	* pt.c (do_class_deduction): Handle the case of no viable implicit
	deduction guides; simplify the code generating implicit deduction
	guides.

/testsuite
2017-08-04  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/79790
	* g++.dg/cpp1z/class-deduction42.C: New.

From-SVN: r250882

2017-08-04  Yury Gribov  <tetra2005@gmail.com>

	PR tree-optimization/57371

gcc/
	* match.pd: New pattern.

gcc/testsuite/
	* c-c++-common/pr57371-1.c: New test.
	* c-c++-common/pr57371-2.c: New test.
	* c-c++-common/pr57371-3.c: New test.
	* c-c++-common/pr57371-4.c: New test.
	* gcc.dg/pr57371-5.c: New test.

From-SVN: r250877

gcc/testsuite/ChangeLog:

2017-08-04  Carl Love  <cel@us.ibm.com>

	* gcc.target/powerpc/builtins-3.c: Remove ISA 3.0 word variant
	builtin test cases for vec_mule, and vec_mulo.
	* gcc.target/powerpc/builtins-3-p8.c: Add  ISA 3.0 word variant
	builtin test cases for vec_mule, and vec_mulo.

From-SVN: r250876

Add a new file, avx512-check.h, to check all AVX512 features.  The test
is skipped if any requested AVX512 features are unavailable.

	PR target/81590
	* gcc.target/i386/avx512-check.h: New file.
	* gcc.target/i386/avx5124fmaps-check.h: Removed.
	* gcc.target/i386/avx5124vnniw-check.h: Likewise.
	* gcc.target/i386/avx512cd-check.h: Likewise.
	* gcc.target/i386/avx512ifma-check.h: Likewise.
	* gcc.target/i386/avx512vbmi-check.h: Likewise.
	* gcc.target/i386/avx512vpopcntdq-check.h: Likewise.
	* gcc.target/i386/avx512bw-check.h: Rewrite.
	* gcc.target/i386/avx512dq-check.h: Likewise.
	* gcc.target/i386/avx512er-check.h: Likewise.
	* gcc.target/i386/avx512f-check.h: Likewise.
	* gcc.target/i386/avx512vl-check.h: Likewise.
	* gcc.target/i386/avx512f-helper.h: Include "avx512-check.h"
	only.
	(test_512): Removed.
	(avx512*_test): Likewise.
	* gcc.target/i386/avx512f-pr71559.c (TEST): Undef.

From-SVN: r250875

Fix PR 81713
 * brigfrontend/brig-basic-inst-handler.cc: replace build_int_cst with
   bitsize_int in building BIT_FIELD_REF.
 * brigfrontend/brig-code-entry-handler.cc: likewise.

From-SVN: r250874

    
    Patch from Uros Bizjak.
    
    Reviewed-on: https://go-review.googlesource.com/53350

From-SVN: r250873

	PR middle-end/81695
	* fold-const.c (fold_indirect_ref_1): For ((int *)&a + 4 -> a[1],
	perform the computation in offset_int.

	* gcc.dg/pr81695.c: New test.

From-SVN: r250871

This patch is a follow-on to the fix for PR81136.  The testcase for that
PR shows that we can (correctly) calculate different base alignments
for two data_references but still tell that their misalignments wrt the
vector size are equal.  This is because we calculate the base alignments
for each dr individually, without looking at the other drs, and in
general the alignment we calculate is only guaranteed if the dr's DR_REF
actually occurs.

This is working as designed, but it does expose a missed opportunity.
We know that if a vectorised loop is reached, all statements in that
loop execute at least once, so it should be safe to pool the alignment
information for all the statements we're vectorising.  The only catch is
that DR_REFs for masked loads and stores only occur if the mask value is
nonzero.  For example, in:

    struct s __attribute__((aligned(32))) {
      int misaligner;
      int array[N];
    };

    int *ptr;
    for (int i = 0; i < n; ++i)
      ptr[i] = c[i] ? ((struct s *) (ptr - 1))->array[i] : 0;

we can only guarantee that ptr points to a "struct s" if at least
one c[i] is true.

This patch adds a DR_IS_CONDITIONAL_IN_STMT flag to record whether
the DR_REF is guaranteed to occur every time that the statement
executes to completion.  It then pools the alignment information
for references that aren't conditional in this sense.

2017-08-04  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	PR tree-optimization/81136
	* tree-vectorizer.h: Include tree-hash-traits.h.
	(vec_base_alignments): New typedef.
	(vec_info): Add a base_alignments field.
	(vect_record_base_alignments): Declare.
	* tree-data-ref.h (data_reference): Add an is_conditional_in_stmt
	field.
	(DR_IS_CONDITIONAL_IN_STMT): New macro.
	(create_data_ref): Add an is_conditional_in_stmt argument.
	* tree-data-ref.c (create_data_ref): Likewise.  Use it to initialize
	the is_conditional_in_stmt field.
	(data_ref_loc): Add an is_conditional_in_stmt field.
	(get_references_in_stmt): Set the is_conditional_in_stmt field.
	(find_data_references_in_stmt): Update call to create_data_ref.
	(graphite_find_data_references_in_stmt): Likewise.
	* tree-ssa-loop-prefetch.c (determine_loop_nest_reuse): Likewise.
	* tree-vect-data-refs.c (vect_analyze_data_refs): Likewise.
	(vect_record_base_alignment): New function.
	(vect_record_base_alignments): Likewise.
	(vect_compute_data_ref_alignment): Adjust base_addr and aligned_to
	for nested statements even if we fail to compute a misalignment.
	Use pooled base alignments for unconditional references.
	(vect_find_same_alignment_drs): Compare base addresses instead
	of base objects.
	(vect_analyze_data_refs_alignment): Call vect_record_base_alignments.
	* tree-vect-slp.c (vect_slp_analyze_bb_1): Likewise.

gcc/testsuite/
	PR tree-optimization/81136
	* gcc.dg/vect/pr81136.c: Add scan test.

From-SVN: r250870

This patch uses new, delete, constructors and desctructors to manage
vec_info.  This includes making ~vec_info free all the data shared
by bb_vec_info and loop_vec_info, whereas previously the code was
duplicated in destroy_bb_vec_info and destroy_loop_vec_info.  This
in turn meant changing the order of:

  FOR_EACH_VEC_ELT (slp_instances, i, instance)
    vect_free_slp_instance (instance);

and:

  gimple_set_uid (stmt, -1);

in destroy_bb_vec_info/~_bb_vec_info, so that now vect_free_slp_instance
could see a uid of -1 as well as 0.  The patch updates vinfo_for_stmt
so that it returns NULL for a uid of -1.

2017-08-04  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* tree-vectorizer.h (vec_info): Add a constructor and destructor.
	Add an explicit name for the enum.  Use auto_vec for slp_instances
	and grouped_stores.
	(_loop_vec_info): Add a constructor and destructor.  Use auto_vec
	for all vectors.
	(_bb_vec_info): Add a constructor and destructor.
	(vinfo_for_stmt): Return NULL for uids of -1 as well.
	(destroy_loop_vec_info): Delete.
	(vect_destroy_datarefs): Likewise.
	* tree-vectorizer.c (vect_destroy_datarefs): Delete.
	(vec_info::vec_info): New function.
	(vec_info::~vec_info): Likewise.
	(vectorize_loops): Use delete instead of destroy_loop_vec_info.
	* tree-parloops.c (gather_scalar_reductions): Use delete instead of
	destroy_loop_vec_info.
	* tree-vect-loop.c (new_loop_vec_info): Replace with...
	(_loop_vec_info::_loop_vec_info): ...this.
	(destroy_loop_vec_info): Replace with...
	(_loop_vec_info::~_loop_vec_info): ...this.  Unconditionally delete
	the stmt_vec_infos.  Leave handling of vec_info information to its
	destructor.  Remove explicit vector releases.
	(vect_analyze_loop_form): Use new instead of new_loop_vec_info.
	(vect_analyze_loop): Use delete instead of destroy_loop_vec_info.
	* tree-vect-slp.c (new_bb_vec_info): Replace with...
	(_bb_vec_info::_bb_vec_info): ...this.  Don't reserve space in
	BB_VINFO_GROUPED_STORES or BB_VINFO_SLP_INSTANCES.
	(destroy_bb_vec_info): Replace with...
	(_bb_vec_info::~_bb_vec_info): ...this.  Leave handling of vec_info
	information to its destructor.
	(vect_slp_analyze_bb_1): Use new and delete instead of
	new_bb_vec_info and destroy_bb_vec_info.
	(vect_slp_bb): Replace 2 calls to destroy_bb_vec_info with a
	single delete.

From-SVN: r250869

This patch checks whether two data references x and y cannot
partially overlap and so are independent whenever &x != &y.
We can then use this in the vectoriser to optimise alias checks.

gcc/
2016-08-04  Richard Sandiford  <richard.sandiford@linaro.org>

	* hash-traits.h (pair_hash): New struct.
	* tree-data-ref.h (data_dependence_relation): Add object_a and
	object_b fields.
	(DDR_OBJECT_A, DDR_OBJECT_B): New macros.
	* tree-data-ref.c (initialize_data_dependence_relation): Initialize
	DDR_OBJECT_A and DDR_OBJECT_B.
	* tree-vectorizer.h (vec_object_pair): New type.
	(_loop_vec_info): Add a check_unequal_addrs field.
	(LOOP_VINFO_CHECK_UNEQUAL_ADDRS): New macro.
	(LOOP_REQUIRES_VERSIONING_FOR_ALIAS): Return true if there is an
	entry in check_unequal_addrs.  Check comp_alias_ddrs instead of
	may_alias_ddrs.
	* tree-vect-loop.c (destroy_loop_vec_info): Release
	LOOP_VINFO_CHECK_UNEQUAL_ADDRS.
	(vect_analyze_loop_2): Likewise, when restarting.
	(vect_estimate_min_profitable_iters): Estimate the cost of
	LOOP_VINFO_CHECK_UNEQUAL_ADDRS.
	* tree-vect-data-refs.c: Include tree-hash-traits.h.
	(vect_prune_runtime_alias_test_list): Try to handle conflicts
	using LOOP_VINFO_CHECK_UNEQUAL_ADDRS, if the data dependence allows.
	Count such tests in the final summary.
	* tree-vect-loop-manip.c (chain_cond_expr): New function.
	(vect_create_cond_for_align_checks): Use it.
	(vect_create_cond_for_unequal_addrs): New function.
	(vect_loop_versioning): Call it.

gcc/testsuite/
	* gcc.dg/vect/vect-alias-check-6.c: New test.

From-SVN: r250868

This patch tries to calculate conservatively-correct distance
vectors for two references whose base addresses are not the same.
It sets a new flag DDR_COULD_BE_INDEPENDENT_P if the dependence
isn't guaranteed to occur.

The motivating example is:

  struct s { int x[8]; };
  void
  f (struct s *a, struct s *b)
  {
    for (int i = 0; i < 8; ++i)
      a->x[i] += b->x[i];
  }

in which the "a" and "b" accesses are either independent or have a
dependence distance of 0 (assuming -fstrict-aliasing).  Neither case
prevents vectorisation, so we can vectorise without an alias check.

I'd originally wanted to do the same thing for arrays as well, e.g.:

  void
  f (int a[][8], struct b[][8])
  {
    for (int i = 0; i < 8; ++i)
      a[0][i] += b[0][i];
  }

I think this is valid because C11 6.7.6.2/6 says:

  For two array types to be compatible, both shall have compatible
  element types, and if both size specifiers are present, and are
  integer constant expressions, then both size specifiers shall have
  the same constant value.

So if we access an array through an int (*)[8], it must have type X[8]
or X[], where X is compatible with int.  It doesn't seem possible in
either case for "a[0]" and "b[0]" to overlap when "a != b".

However, as the comment above "if (same_base_p)" explains, GCC is more
forgiving: it supports arbitrary overlap of arrays and allows arrays to
be accessed with different dimensionality.  There are examples of this
in PR50067.  The patch therefore only handles references that end in a
structure field access.

There are two ways of handling these dependences in the vectoriser:
use them to limit VF, or check at runtime as before.  I've gone for
the approach of checking at runtime if we can, to avoid limiting VF
unnecessarily, but falling back to a VF cap when runtime checks aren't
allowed.

The patch tests whether we queued an alias check with a dependence
distance of X and then picked a VF <= X, in which case it's safe to
drop the alias check.  Since vect_prune_runtime_alias_check_list
can be called twice with different VF for the same loop, it's no
longer safe to clear may_alias_ddrs on exit.  Instead we should use
comp_alias_ddrs to check whether versioning is necessary.

2017-08-04  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* tree-data-ref.h (subscript): Add access_fn field.
	(data_dependence_relation): Add could_be_independent_p.
	(SUB_ACCESS_FN, DDR_COULD_BE_INDEPENDENT_P): New macros.
	(same_access_functions): Move to tree-data-ref.c.
	* tree-data-ref.c (ref_contains_union_access_p): New function.
	(access_fn_component_p): Likewise.
	(access_fn_components_comparable_p): Likewise.
	(dr_analyze_indices): Add a reference to access_fn_component_p.
	(dump_data_dependence_relation): Use SUB_ACCESS_FN instead of
	DR_ACCESS_FN.
	(constant_access_functions): Likewise.
	(add_other_self_distances): Likewise.
	(same_access_functions): Likewise.  (Moved from tree-data-ref.h.)
	(initialize_data_dependence_relation): Use XCNEW and remove
	explicit zeroing of DDR_REVERSED_P.  Look for a subsequence
	of access functions that have the same type.  Allow the
	subsequence to end with different bases in some circumstances.
	Record the chosen access functions in SUB_ACCESS_FN.
	(build_classic_dist_vector_1): Replace ddr_a and ddr_b with
	a_index and b_index.  Use SUB_ACCESS_FN instead of DR_ACCESS_FN.
	(subscript_dependence_tester_1): Likewise dra and drb.
	(build_classic_dist_vector): Update calls accordingly.
	(subscript_dependence_tester): Likewise.
	* tree-ssa-loop-prefetch.c (determine_loop_nest_reuse): Check
	DDR_COULD_BE_INDEPENDENT_P.
	* tree-vectorizer.h (LOOP_REQUIRES_VERSIONING_FOR_ALIAS): Test
	comp_alias_ddrs instead of may_alias_ddrs.
	* tree-vect-data-refs.c (vect_analyze_possibly_independent_ddr):
	New function.
	(vect_analyze_data_ref_dependence): Use it if
	DDR_COULD_BE_INDEPENDENT_P, but fall back to using the recorded
	distance vectors if that fails.
	(dependence_distance_ge_vf): New function.
	(vect_prune_runtime_alias_test_list): Use it.  Don't clear
	LOOP_VINFO_MAY_ALIAS_DDRS.

gcc/testsuite/
	* gcc.dg/vect/vect-alias-check-3.c: New test.
	* gcc.dg/vect/vect-alias-check-4.c: Likewise.
	* gcc.dg/vect/vect-alias-check-5.c: Likewise.

From-SVN: r250867

2017-08-04  Richard Biener  <rguenther@suse.de>

	PR middle-end/81705
	* fold-const.c (fold_binary_loc): Properly restrict
	minus_var0 && minus_var1 case when associating undefined overflow
	entities.

	* c-c++-common/ubsan/pr81705.c: New testcase.

From-SVN: r250866

Currently we generate an if with probability set on only one of the two edges:
  <bb 5> [0.00%] [count: INV]:
  _5 = mask.3[iter.6_3];
  if (_5 == 0)
    goto <bb 6>; [INV] [count: INV]
  else
    goto <bb 2>; [100.00%] [count: INV]

Add the missing edge probability, and set the split to unlikely/likely:
  if (_5 == 0)
    goto <bb 6>; [19.99%] [count: INV]
  else
    goto <bb 2>; [80.01%] [count: INV]

2017-08-04  Tom de Vries  <tom@codesourcery.com>

	* omp-simd-clone.c (simd_clone_adjust): Add missing edge probability.

From-SVN: r250865

From-SVN: r250864