[Bug tree-optimization/47155] [4.6 Regression] ccp caused miscompilation

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47155

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-03 
21:01:18 UTC ---
Author: jakub
Date: Mon Jan  3 21:01:14 2011
New Revision: 168440

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=168440
Log:
    PR tree-optimization/47155
    * tree-ssa-ccp.c (bit_value_binop_1): Use r1type instead of type
    when computing uns.

    * gcc.c-torture/execute/pr47155.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr47155.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-ccp.c