[Bug tree-optimization/58653] [4.7/4.8/4.9 Regression] wrong code (segfaults) at -O3 on x86_64-linux-gnu in 64-bit mode (affecting gcc 4.6 to trunk)

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58653

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov  6 15:00:16 2013
New Revision: 204458

URL: http://gcc.gnu.org/viewcvs?rev=204458&root=gcc&view=rev
Log:
2013-11-06  Richard Biener  <rguent...@suse.de>

    PR tree-optimization/58653
    * tree-predcom.c (ref_at_iteration): Rewrite to generate
    a MEM_REF.
    (prepare_initializers_chain): Adjust.

    * gcc.dg/tree-ssa/predcom-6.c: New testcase.
    * gcc.dg/tree-ssa/predcom-7.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/predcom-6.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/predcom-7.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-predcom.c