[Bug tree-optimization/63666] New: [5.0 regression] FAIL: gcc.dg/vect/pr45752.c (internal compiler error)

["schwab@linux-m68k.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63666

            Bug ID: 63666
           Summary: [5.0 regression] FAIL: gcc.dg/vect/pr45752.c (internal
                    compiler error)
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
                CC: rguenther at suse dot de
            Target: ia64-*-*

Broken by r216728.

$ gcc/xgcc -Bgcc/ ../gcc/testsuite/gcc.dg/vect/pr45752.c -ftree-vectorize
-fno-vect-cost-model -fno-common -O2 -fdump-tree-vect-details -lm -o
./pr45752.exe
../gcc/testsuite/gcc.dg/vect/pr45752.c: In function ‘foo’:
../gcc/testsuite/gcc.dg/vect/pr45752.c:38:6: internal compiler error: in
ia64_vectorize_vec_perm_const_ok, at config/ia64/ia64.c:11728
 void foo (unsigned int *__restrict__ pInput,
      ^
0x4000000001069d9f ia64_vectorize_vec_perm_const_ok
        ../../gcc/config/ia64/ia64.c:11728
0x400000000090272f can_vec_perm_p(machine_mode, bool, unsigned char const*)
        ../../gcc/optabs.c:6611
0x4000000000f387df vect_transform_slp_perm_load(_slp_tree*, vec<tree_node*,
va_heap, vl_ptr>, gimple_stmt_iterator*, int, _slp_instance*, bool)
        ../../gcc/tree-vect-slp.c:3049
0x4000000000f3c99f vect_supported_load_permutation_p
        ../../gcc/tree-vect-slp.c:1349
0x4000000000f3c99f vect_analyze_slp_instance
        ../../gcc/tree-vect-slp.c:1677
0x4000000000f3d28f vect_analyze_slp(_loop_vec_info*, _bb_vec_info*, unsigned
int)
        ../../gcc/tree-vect-slp.c:1747
0x4000000000f1674f vect_analyze_loop_2
        ../../gcc/tree-vect-loop.c:1762
0x4000000000f1674f vect_analyze_loop(loop*)
        ../../gcc/tree-vect-loop.c:1875
0x4000000000f4659f vectorize_loops()
        ../../gcc/tree-vectorizer.c:442
0x4000000000d77abf execute
        ../../gcc/tree-ssa-loop.c:290
>From gcc-bugs-return-465118-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 28 10:27:18 2014
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Subject: [Bug tree-optimization/63666] [5.0 regression] FAIL: gcc.dg/vect/pr45752.c (internal compiler error)
Date: Tue, 28 Oct 2014 10:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idc666

Jiong Wang <jiwang at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jiwang at gcc dot gnu.org

--- Comment #1 from Jiong Wang <jiwang at gcc dot gnu.org> ---
I noticed this on aarch64 platform also and I suspect it's caused by

commit f619ecaed41d1487091098a0f4fdf4d6ed1fa379
Author: rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Mon Oct 27 11:30:23 2014 +0000

    2014-10-27  Richard Biener  <rguenther@suse.de>

        * tree-ssa-forwprop.c: Include tree-cfgcleanup.h and tree-into-ssa.h.
        (lattice): New global.
        (fwprop_ssa_val): New function.
        (fold_all_stmts): Likewise.
        (pass_forwprop::execute): Finally fold all stmts.

        * gcc.dg/tree-ssa/forwprop-6.c: Scan ccp1 dump instead.
        * gcc.dg/strlenopt-8.c: Adjust and XFAIL for non_strict_align
        target due to memcpy inline-expansion.


    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@216728
138bc75d-0d04-0410-961f-82ee72b054a4