[Bug middle-end/56559] [4.8 Regression] ICE in propagate_op_to_single_use, at tree-ssa-reassoc.c:1057

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56559

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-03-07 14:34:23 UTC ---
Author: jakub
Date: Thu Mar  7 14:34:15 2013
New Revision: 196520

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=196520
Log:
    PR tree-optimization/56559
    * tree-ssa-reassoc.c (zero_one_operation): When looking at rhs2,
    check that it has only a single use.

    * gcc.dg/tree-ssa/reassoc-26.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/reassoc-26.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-reassoc.c