[Bug tree-optimization/70948] New: [7 Regression] r235622 caused gcc.c-torture/execute/va-arg-pack-1.c execution failure AArch64

[jiwang at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70948

            Bug ID: 70948
           Summary: [7 Regression] r235622 caused
                    gcc.c-torture/execute/va-arg-pack-1.c execution
                    failure AArch64
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jiwang at gcc dot gnu.org
                CC: rguenth at gcc dot gnu.org
  Target Milestone: ---
            Target: aarch64*

Noticed the following regression on aarch64 after r235622

2016-04-29  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/13962
        PR tree-optimization/65686
        * tree-ssa-alias.h (ptrs_compare_unequal): Declare.
        * tree-ssa-alias.c (ptrs_compare_unequal): New function
        using PTA to compare pointers.
        * match.pd: Add pattern for pointer equality compare simplification
        using ptrs_compare_unequal.



make check RUNTESTFLAGS="execute.exp=va-arg-pack-1.c"

FAIL: gcc.c-torture/execute/va-arg-pack-1.c   -O2  execution test
FAIL: gcc.c-torture/execute/va-arg-pack-1.c   -O3 -g  execution test
FAIL: gcc.c-torture/execute/va-arg-pack-1.c   -O2 -flto -fno-use-linker-plugin
-flto-partition=none  execution test
FAIL: gcc.c-torture/execute/va-arg-pack-1.c   -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects  execution test