[Bug tree-optimization/51042] [4.5/4.6/4.7 Regression] endless recursion in phi_translate

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51042

--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-11-10 
15:29:01 UTC ---
Author: rguenth
Date: Thu Nov 10 15:28:57 2011
New Revision: 181256

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=181256
Log:
2011-11-10  Richard Guenther  <rguent...@suse.de>

    PR tree-optimization/51042
    * tree-ssa-pre.c (phi_translate_1): Avoid recursing on
    self-referential expressions.  Refactor code to avoid duplication.

    * gcc.dg/torture/pr51042.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr51042.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-pre.c