2017-07-03  Martin Liska  <mliska@suse.cz>

	* asan.c (asan_emit_stack_protection): Unpoison just red zones
	and shadow memory of auto variables which are subject of
	use-after-scope sanitization.
	(asan_expand_mark_ifn): Add do set only when is_poison.

From-SVN: r249900

2016-07-03  Richard Biener  <rguenther@suse.de>

	* tree-vect-loop.c (vect_analyze_loop_operations): Also analyze
	reduction PHIs.
	(vect_force_simple_reduction): Record reduction def -> phi mapping.
	(vectorizable_reduction): Perform reduction PHI creation when
	visiting a reduction PHI and adjust and simplify code generation
	phase of the reduction op.  Cache dts, use fold_binary, not fold_build2.
	(vect_transform_loop): Visit reduction PHIs.
	* tree-vect-slp.c (vect_get_and_check_slp_defs): Record reduction
	defs into the SLP tree.
	(vect_build_slp_tree): Reduction defs terminate the recursion.
	* tree-vect-stmts.c (vect_get_vec_def_for_operand_1): Allow lookup
	of reduction defs.
	(vect_get_vec_defs_for_stmt_copy): Export.
	(vect_get_vec_defs): Likewise.
	* tree-vectorizer.h (struct _stmt_vec_info): Amend reduc_def
	purpose.
	(vect_get_vec_defs_for_stmt_copy): Declare.
	(vect_get_vec_defs): Likewise.

From-SVN: r249897

dr_analyze_innermost had a "struct loop *nest" parameter that acted
like a boolean.  This was added in r179161, with the idea that a
null nest selected BB-level analysis rather than loop analysis.

The handling seemed strange though.  If the DR was part of a loop,
we still tried to express the base and offset values as IVs, potentially
giving a nonzero step.  If that failed for any reason, we'd revert to
using the original base and offset, just as we would if we hadn't asked
for an IV in the first place.

It seems more natural to use the !in_loop handling whenever nest is null
and always set the step to zero.  This actually enables one more SLP
opportunity in bb-slp-pr65935.c.

I checked out r179161 and tried the patch there.  The test case added
in that revision still passes, so I don't think there was any particular
need to check simple_iv.

2017-06-28  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* tree-data-ref.c (dr_analyze_innermost): Replace the "nest"
	parameter with a "loop" parameter and use it instead of the
	loop containing DR_STMT.  Don't check simple_iv when doing
	BB analysis.  Describe the two analysis modes in the comment.

gcc/testsuite/
	* gcc.dg/vect/bb-slp-pr65935.c: Expect SLP to be used in main
	as well.

From-SVN: r249896

2017-07-03  Tom de Vries  <tom@codesourcery.com>

	PR tree-optimization/69468
	* tree-ssa-tail-merge.c (ignore_edge_flags): New constant.
	(find_same_succ_bb): Handle ignore_edge_flags.

	* gcc.dg/pr81192.c: Update.

From-SVN: r249895

2017-07-03  Tom de Vries  <tom@codesourcery.com>

	PR tree-optimization/81192
	* tree-ssa-tail-merge.c (same_succ_hash): Use bb->loop_father->num in
	hash.
	(same_succ::equal): Don't find bbs to be equal if bb->loop_father
	differs.
	(find_same_succ_bb): Remove obsolete test on bb->loop_father->latch.

	* gcc.dg/pr81192.c: Update.

From-SVN: r249894

2017-07-03  Tom de Vries  <tom@codesourcery.com>

	PR tree-optimization/81192
	* tree-ssa-tail-merge.c (same_succ_flush_bb): Handle
	BB_SAME_SUCC (bb) == NULL.

	* gcc.dg/pr81192.c: New test.

From-SVN: r249893

From-SVN: r249892

	* cfgrtl.c (rtl_verify_edges): Enable checking of profile_probability
	consistency.

From-SVN: r249888

	* dumpfile.c: Include profile-count.h
	* tree-cfg.c (gimple_duplicate_sese_tail): Drop UNUSED attributes; update
	profile.
	(insert_cond_bb): Update profile.
	* tree-cfg.h (insert_cond_bb): Update prototype.
	* tree-chkp-opt.c (chkp_optimize_string_function_calls): Update.
	* tree-dump.c: Do not include tree-cfg.

From-SVN: r249887

From-SVN: r249886

	* expect.c (dw2_build_landing_pads): Update profile of the landing pad
	bb.

From-SVN: r249885

From-SVN: r249884

2017-07-02  Jan Kratochvil  <jan.kratochvil@redhat.com>

        * dwarf2.def (DW_IDX_compile_unit, DW_IDX_type_unit, DW_IDX_die_offset)
        (DW_IDX_parent, DW_IDX_type_hash, DW_IDX_lo_user, DW_IDX_hi_user)
        (DW_IDX_GNU_internal, DW_IDX_GNU_external): New.
        * dwarf2.h (DW_IDX, DW_IDX_DUP, DW_FIRST_IDX, DW_END_IDX): New.
        (enum dwarf_name_index_attribute): Remove.
        (get_DW_IDX_name): New declaration.

libiberty/ChangeLog
2017-07-02  Jan Kratochvil  <jan.kratochvil@redhat.com>

        * dwarfnames.c (DW_FIRST_IDX, DW_END_IDX, DW_IDX, DW_IDX_DUP): New.

From-SVN: r249883

2017-07-02  Thomas Koenig  <tkoenig@gcc.gnu.org>

	* intrinsics/eoshift0.c:  For contiguous arrays, use
	block algorithm.  Use memcpy where possible.

2017-07-02  Thomas Koenig  <tkoenig@gcc.gnu.org>

	* gfortran/eoshift_3.f90:  New test.

From-SVN: r249882

This patch splits the auto-generated inline functions out of
insn-modes.h and puts them in a new header file, insn-modes-inline.h.
It also makes coretypes.h include these files directly, rather than
indirectly via machmode.h.  This in turn allows insn-modes-inline.h
and machmode.h to come later in the include list, after wide-int.h.
This is useful for later patches.

insn-modes.h itself still needs to come first, since it provides
configuration information like MAX_BITSIZE_MODE_ANY_INT, which is
used to control the size of a wide_int.

The patch also makes the generator files include machmode.h
via coretypes.h.  Previously they did it by more indirect means.

Finally, the patch makes wide-int-print.h available via coretypes.h
too.  There didn't seem to be any reason to force only the print
routines to be included directly, and it would be painful to extend
that approach to the SVE patches.


[Based on the code ARM contributed in branches/ARM/sve-branch@242100]

2017-07-02  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

contrib/header-tools/
	* graph-header-logs (ignore): Update coretypes.h header list.

gcc/
	* Makefile.in (MACHMODE_H): Remove insn-modes.h
	(CORETYPES_H): New define.
	(MOSTLYCLEANFILES): Add insn-modes-inline.h.
	(insn-modes-inline.h, s-modes-inline-h): New rules.
	(generated_files): Add insn-modes-inline.h.
	(RTL_BASE_H, TREE_CORE_H): Use CORETYPES_H instead of coretypes.h.
	(build/gensupport.o, build/ggc-none.o, build/print-rtl.o): Likewise.
	(build/read-md.o, build/read-rtl.o, build/rtl.o): Likewise.
	(build/vec.o, build/hash-table.o, build/inchash.o): Likewise.
	(build/gencondmd.o, build/genattr.o, build/genattr-common.o): Likewise.
	(build/genattrtab.o, build/genautomata.o, build/gencheck.o): Likewise.
	(build/gencodes.o, build/genconditions.o): Likewise.
	(build/genconfig.o, build/genconstants.o, build/genemit.o): Likewise.
	(build/genenums.o, build/genextract.o, build/genflags.o): Likewise.
	(build/gentarget-def.o, build/genmddeps.o, build/genopinit.o)
	(build/genoutput.o, build/genpeep.o, build/genpreds.o): Likewise.
	(build/genrecog.o, build/genmddump.o, build/genmatch.o): Likewise.
	(build/gencfn-macros.o, build/gcov-iov.o): Likewise.
	* coretypes.h: Include everything up to real.h for generators.
	Include insn-modes.h first.  Include wide-int-print.h after
	wide-int.h.  Include insn-modes-inline.h and then machmode.h.
	* machmode.h: Don't include insn-modes.h here.
	* function-tests.c: Remove includes of signop.h, machmode.h,
	double-int.h and wide-int.h.
	* rtl.h: Likewise.
	* gcc-rich-location.c: Remove includes of machmode.h, double-int.h
	and wide-int.h.
	* optc-save-gen.awk: Likewise.
	* gencheck.c (BITS_PER_UNIT): Delete dummy definition.
	* godump.c: Remove include of wide-int-print.h.
	* pretty-print.h: Likewise.
	* wide-int-print.cc: Likewise.
	* wide-int.cc: Likewise.
	* hash-map-tests.c: Remove include of signop.h.
	* hash-set-tests.c: Likewise.
	* rtl-tests.c: Likewise.
	* mkconfig.sh: Remove include of machmode.h.
	* genmodes.c (emit_insn_modes_h): Split emission of inline functions
	into...
	(emit_insn_modes_inline_h): ...this new function.  Emit the code
	into an insn-modes-inline.h header file, adding appropriate
	include guards and end comments.
	(emit_insn_modes_c_header): Remove include of machmode.h.
	(emit_min_insn_modes_c_header): Include coretypes.h rather than
	machmode.h.
	(main): Handle -i flag and call emit_insn_modes_inline_h when
	it is passed.

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

From-SVN: r249881

tree-ssa-strlen.c looks for cases in which a string is built up using
operations like:

    memcpy (a, "foo", 4);
    memcpy (a + 3, "bar", 4);
    int x = strlen (a);

As a side-effect, it optimises the non-final memcpys so that they don't
include the nul terminator.

However, after removing some "& ~0x1"s from tree-ssa-dse.c, the DSE pass
does this optimisation itself (because it can tell that later memcpys
overwrite the terminators).  The strlen pass wasn't able to handle these
pre-optimised calls in the same way as the unoptimised ones.

This patch adds support for tracking unterminated strings.

[Based on the code ARM contributed in branches/ARM/sve-branch@246236]

2017-07-02  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* tree-ssa-strlen.c (strinfo): Rename the length field to
	nonzero_chars.  Add a full_string_p field.
	(compare_nonzero_chars, zero_length_string_p): New functions.
	(get_addr_stridx): Add an offset_out parameter.
	Use compare_nonzero_chars.
	(get_stridx): Update accordingly.  Use compare_nonzero_chars.
	(new_strinfo): Update after above changes to strinfo.
	(set_endptr_and_length): Set full_string_p.
	(get_string_length): Update after above changes to strinfo.
	(unshare_strinfo): Update call to new_strinfo.
	(maybe_invalidate): Likewise.
	(get_stridx_plus_constant): Change off to unsigned HOST_WIDE_INT.
	Use compare_nonzero_chars and zero_string_p.  Treat nonzero_chars
	as a uhwi instead of an shwi.  Update after above changes to
	strinfo and new_strinfo.
	(zero_length_string): Assert that chainsi contains full strings.
	Use zero_length_string_p.  Update call to new_strinfo.
	(adjust_related_strinfos): Update after above changes to strinfo.
	Copy full_string_p from origsi.
	(adjust_last_stmt): Use zero_length_string_p.
	(handle_builtin_strlen): Update after above changes to strinfo and
	new_strinfo.  Install the lhs as the string length if the previous
	entry didn't describe a full string.
	(handle_builtin_strchr): Update after above changes to strinfo
	and new_strinfo.
	(handle_builtin_strcpy): Likewise.
	(handle_builtin_strcat): Likewise.
	(handle_builtin_malloc): Likewise.
	(handle_pointer_plus): Likewise.
	(handle_builtin_memcpy): Likewise.  Track nonzero characters
	that aren't necessarily followed by a nul terminator.
	(handle_char_store): Likewise.

gcc/testsuite/
	* gcc.dg/strlenopt-32.c: New testcase.
	* gcc.dg/strlenopt-33.c: Likewise.
	* gcc.dg/strlenopt-33g.c: Likewise.
	* gcc.dg/strlenopt-34.c: Likewise.
	* gcc.dg/strlenopt-35.c: Likewise.

From-SVN: r249880

In this testcase, we (correctly) record after:

  strcpy (p1, "abcde");
  char *p2 = strchr (p1, '\0');
  strcpy (p2, q);

that the length of p1 and p2 can be calculated by converting the
second strcpy to:

  tmp = stpcpy (p2, q)

and then doing tmp - p1 for p1 and tmp - p2 for p2.  This is delayed
until we know whether we actually need it.  Then:

  char *p3 = strchr (p2, '\0');

forces us to calculate the length of p2 in this way.  At this point
we had three related strinfos:

  p1: delayed length, calculated from tmp = stpcpy (p2, q)
  p2: known length, tmp - p2
  p3: known length, 0

After:

  memcpy (p3, "x", 2);

we use adjust_related_strinfos to add 1 to each length.  However,
that didn't do anything for delayed lengths because:

	  else if (si->stmt != NULL)
	    /* Delayed length computation is unaffected.  */
	    ;

So after the memcpy we had:

  p1: delayed length, calculated from tmp = stpcpy (p2, q)
  p2: known length, tmp - p2 + 1
  p3: known length, 1

where the length of p1 was no longer correct.

2017-05-16  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	PR tree-optimization/80769
	* tree-ssa-strlen.c (strinfo): Document that "stmt" is also used
	for malloc and calloc.  Document the new invariant that all related
	strinfos have delayed lengths or none do.
	(verify_related_strinfos): Move earlier in file.
	(set_endptr_and_length): New function, split out from...
	(get_string_length): ...here.  Also set the lengths of related
	strinfos.
	(zero_length_string): Assert that chainsi has known (rather than
	delayed) lengths.
	(adjust_related_strinfos): Likewise.

gcc/testsuite/
	PR tree-optimization/80769
	* gcc.dg/strlenopt-31.c: New test.
	* gcc.dg/strlenopt-31g.c: Likewise.

From-SVN: r249879

The test case triggered this assert in vect_update_misalignment_for_peel:

      gcc_assert (DR_MISALIGNMENT (dr) / dr_size ==
                  DR_MISALIGNMENT (dr_peel) / dr_peel_size);

The problem was that:

- one memory reference guaranteed a high base alignment, when considering
  that reference in isolation.  This meant that we could calculate the
  vector misalignment for its DR at compile time.

- the other memory reference only guaranteed a low base alignment,
  when considering that reference in isolation.  We therefore couldn't
  calculate the vector misalignment for its DR at compile time.

- when looking at the values of the two addresses as a pair (rather
  than the memory references), it was obvious that they had the same
  misalignment, whatever that misalignment happened to be.

This is working as designed, so the patch restricts the assert to cases
in which both addresses have a compile-time misalignment.

In the test case this looks like a missed opportunity.  Both references
are unconditional, so it should be possible to use the highest of the
available base alignment guarantees when analyzing each reference.
A later patch does this, but the problem would still remain for
conditional references.

2017-07-02  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	PR tree-optimization/81136
	* tree-vect-data-refs.c (vect_update_misalignment_for_peel): Only
	assert that two references with the same misalignment have the same
	compile-time misalignment if those compile-time misalignments
	are known.

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

From-SVN: r249878

A tree type dump currently doesn't print the attributes. Since we have
so many now and they do many interesting things dumping them can be
useful. So dump them by default for tree type dumps.

gcc/:

2017-07-01  Andi Kleen  <ak@linux.intel.com>

        * print-tree.c (print_node): Print all attributes.

From-SVN: r249877

From-SVN: r249876

	* cfg.c (scale_bbs_frequencies): New function.
	* cfg.h (scale_bbs_frequencies): Declare it.
	* cfgloopanal.c (single_likely_exit): Cleanup.
	* cfgloopmanip.c (scale_loop_frequencies): Take profile_probability
	as parameter.
	(scale_loop_profile): Likewise.
	(loop_version): Likewise.
	(create_empty_loop_on_edge): Update.
	* cfgloopmanip.h (scale_loop_frequencies, scale_loop_profile,
	scale_loop_frequencies, scale_loop_profile, loopify,
	loop_version): Update prototypes.
	* modulo-sched.c (sms_schedule): Update.
	* predict.c (unlikely_executed_edge_p): Also check probability.
	(probably_never_executed_edge_p): Fix typo.
	* tree-if-conv.c (version_loop_for_if_conversion): Update.
	* tree-parloops.c (gen_parallel_loop): Update.
	* tree-ssa-loop-ivcanon.c (try_peel_loop): Update.
	* tree-ssa-loop-manip.c (tree_transform_and_unroll_loop): Update.
	* tree-ssa-loop-split.c (split_loop): Update.
	* tree-ssa-loop-unswitch.c (tree_unswitch_loop): Update.
	* tree-vect-loop-manip.c (vect_do_peeling): Update.
	(vect_loop_versioning): Update.
	* tree-vect-loop.c (scale_profile_for_vect_loop): Update.

From-SVN: r249872

From-SVN: r249871

	* tree-if-conv.c (combine_blocks): Use make_single_succ_edge
	to keep profile consistent.

From-SVN: r249870

	* cfgrtl.c (rtl_flow_call_edges_add): Update profile.
	* tree-cfg.c (gimple_flow_call_edges_add): Likewise.
	* profile-count.h (max_safe_multiplier): Make unsigned.
	(profile_count::guessed_zero): New.

From-SVN: r249869

bb-reorder.c (fix_up_crossing_landing_pad, [...]): Use make_single_succ_edge to keep profile consistent.

	* bb-reorder.c (fix_up_crossing_landing_pad,
	fix_crossing_conditional_branches): Use make_single_succ_edge
	to keep profile consistent.

From-SVN: r249868

	* tree-vect-loop.c (optimize_mask_stores): Use make_single_succ_edge
	to update profile.

From-SVN: r249867

	PR sanitizer/81262
	* bb-reorder.c (fix_up_fall_thru_edges): Move variable declarations to
	the right scopes, make sure cond_jump isn't preserved between multiple
	iterations.  Search for fallthru edge whenever there are 3+ edges and
	use find_fallthru_edge for it.

From-SVN: r249866

	PR sanitizer/81262
	* bb-reorder.c (fix_up_fall_thru_edges): Move variable declarations to
	the right scopes, make sure cond_jump isn't preserved between multiple
	iterations.  Search for fallthru edge whenever there are 3+ edges and
	use find_fallthru_edge for it.

	* gcc.c-torture/compile/pr81262.c: New test.
	* g++.dg/ubsan/pr81262.C: New test.

From-SVN: r249865

	Patch by Alexander Monakov <amonakov@ispras.ru>
	* sel-sched-ir.c (compute_succs_info): Handle uninitialized
	probabilities consistently.

From-SVN: r249864

	* sel-sched-ir.c (compute_succs_info): Handle uninitialized
	probabilities consistently.

From-SVN: r249863

	* pa.c (pa_expand_compare_and_swap_loop): Update call of
	emit_cmp_and_jump_insns.

From-SVN: r249862

From-SVN: r249861

	PR ipa/81261
	* tree-inline.c (expand_call_inline): Combine profile statuses.

From-SVN: r249856

	PR c++/54769 - wrong lookup of dependent template-name.
	* parser.c (cp_parser_template_name): Revert part of last change.

From-SVN: r249855

2017-06-30  Andrew Pinski  <apinski@cavium.com>

        * tree-if-conv.c (predicate_scalar_phi): Update new_stmt if
        fold_stmt returned true.
2017-06-30  Andrew Pinski  <apinski@cavium.com>

        * gcc.dg/torture/pr81245.c: New testcase.

From-SVN: r249854

	* config-lang.in (gtfiles): Add cp/lex.c.
	* cp-tree.h (mangle_convop_name_for_type): Rename ...
	(make_conv_op_name): ... here.  Move to lex.
	* lambda.c (maybe_add_lambda_conv_op): Update.
	* parser.c (cp_parser_conversion_function_id): Update.
	* pt.c (tsubst_decl, tsubst_baselink, tsubst_copy,
	tsubst_copy_and_build): Update.
	* semantics.c (apply_deduced_return_type): Update.
	* mangle.c (conv_type_hasher, conv_type_names,
	mangle_conv_op_name_for_type): Move to ...
	* lex.c (conv_type_hasher, conv_type_names, make_convop_name):
	... here.  Rename.

	* libcp1plugin.cc (plugin_build_decl): Use make_conv_op_name.
	(plugin_build_dependent_expr): Likewise.

From-SVN: r249852

	* ggc.h (empty_string): Delete.
	* cfgexpand.c (expand_asm_stmt): Use plain "".
	* optabs.c (expand_asm_memory_barrier): Likewise.
	* stringpool.c (empty_string): Delete.
	(digit_vector, digit_string): Delete.
	(ggc_alloc_string): Use plain "", don't optimize single digit
	strings.  Use ggc_alloc_atomic.

From-SVN: r249851

    
Many parallel set insns are of the form of a single set that also sets
the condition code flags.  In this case the cost of such an insn is
normally the cost of the part that doesn't set the flags, since
updating the condition flags is simply a side effect.

At present all such insns are treated as having unknown cost (ie 0)
and combine assumes that such insns are infinitely more expensive than
any other insn sequence with a non-zero cost.

This patch addresses this problem by allowing insn_rtx_cost to ignore
the condition setting part of a PARALLEL iff there is exactly one
comparison set and one non-comparison set.  If the only set operation
is a comparison we still use that as the basis of the insn cost.

	* rtlanal.c (insn_rtx_cost): If a parallel contains exactly one
	comparison set and one other set, use the cost of the non-comparison
	set.

Bootstrapped on aarch64-none-linuxgnu

From-SVN: r249850

	* ggc.h: Replace all 'static inline' with plain 'inline'.  Fix
	some formatting.

From-SVN: r249848

	* tree-cfg.c (group_case_labels_stmt): Merge scanning and compressing
	loops.  Remove now unneeded calls to gimple_switch_set_label() that
	just set removed labels to NULL_TREE.

From-SVN: r249847