[Bug middle-end/54219] [4.8 Regression] __builtin_shuffle mask reversed

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54219

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-08-10 
13:35:40 UTC ---
Author: rguenth
Date: Fri Aug 10 13:35:34 2012
New Revision: 190297

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=190297
Log:
2012-08-10  Richard Guenther  <rguent...@suse.de>

    PR middle-end/54219
    * fold-const.c (fold_ternary_loc): Do not reverse the mask
    when canonicalizing it when folding VEC_PERM_EXPR.

    * gcc.dg/torture/vector-shuffle1.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/vector-shuffle1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog