[Bug tree-optimization/50763] [4.7 Regression] ICE: verify_gimple failed: missing PHI def with -ftree-tail-merge

[vries at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50763

--- Comment #14 from vries at gcc dot gnu.org 2011-10-26 09:33:52 UTC ---
Author: vries
Date: Wed Oct 26 09:33:49 2011
New Revision: 180518

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=180518
Log:
2011-10-26  Tom de Vries  <tom@codesourcery.com>

    PR tree-optimization/50763
    * tree-ssa-tail-merge.c (replace_block_by): Update vops if phi_vuse1 or
    phi_vuse2 is NULL_TREE only if bb1 dominates or is dominated by bb2.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-tail-merge.c