2017-07-03 Richard Biener <rguenther@suse.de>
* tree-vect-loop.c (vect_create_epilog_for_reduction): Revert
back to using VIEW_CONVERT_EXPR.
From-SVN: r249902
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
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/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
2017-07-02 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
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
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
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
* 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
* tree-ssanames.c (set_range_info_raw): Abstract from ...
(set_range_info): ...here. Only call set_range_info_raw if domain
is useful.
(set_nonzero_bits): Call set_range_info_raw.
* tree-ssanames.h (set_range_info_raw): New.
testsuite/
* gcc.dg/Walloca-14.c: Adapt test to recognize new complaint of
unbounded use.
From-SVN: r249846
PR target/81225
* config/i386/sse.md (vec_extract_lo_<mode><mask_name>): For
V8FI, V16FI and VI8F_256 iterators, use <store_mask_predicate> instead
of nonimmediate_operand and <store_mask_constraint> instead of m for
the input operand. For V8FI iterator, always split if input is a MEM.
For V16FI and V8SF_256 iterators, don't test if both operands are MEM
if <mask_applied>. For VI4F_256 iterator, use <store_mask_predicate>
instead of register_operand and <store_mask_constraint> instead of v for
the input operand. Make sure both operands aren't MEMs for if not
<mask_applied>.
* gcc.target/i386/pr81225.c: New test.
From-SVN: r249844
2017-06-30 Martin Liska <mliska@suse.cz>
PR ipa/81214
* gcc.target/i386/pr81214.c: New test.
2017-06-30 Martin Liska <mliska@suse.cz>
PR ipa/81214
* multiple_target.c (create_dispatcher_calls): Make ifunc
also for function that don't have calls or are not referenced.
From-SVN: r249840
2017-06-30 Richard Biener <rguenther@suse.de>
* tree-vect-slp.c (vect_slp_analyze_node_operations): Only
analyze the first scalar stmt. Move vector type computation
for the BB case here from ...
* tree-vect-stmts.c (vect_analyze_stmt): ... here. Guard
live operation processing in the SLP case properly.
From-SVN: r249839
