[Bug tree-optimization/47538] [4.6 Regression] GNU Scientific Library miscompiled by gcc 4.6

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47538

--- Comment #17 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-31 
16:52:27 UTC ---
Author: jakub
Date: Mon Jan 31 16:52:22 2011
New Revision: 169441

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=169441
Log:
    PR tree-optimization/47538
    * tree-ssa-ccp.c (bit_value_binop_1): For uns computation use
    type instead of r1type, except for comparisons.  For right
    shifts and comparisons punt if there are mismatches in
    sizetype vs. non-sizetype types.

    * gcc.c-torture/execute/pr47538.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr47538.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-ccp.c