[Bug tree-optimization/48377] [4.6/4.7 regression] miscompilation at -O3

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48377

--- Comment #36 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-04-08 
11:38:23 UTC ---
Author: jakub
Date: Fri Apr  8 11:38:19 2011
New Revision: 172172

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=172172
Log:
    PR tree-optimization/48377
    * tree-vect-data-refs.c (vector_alignment_reachable_p): Set
    is_packed to true even for types with smaller TYPE_ALIGN than
    TYPE_SIZE.

    * gcc.dg/vect/pr48377.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/vect/pr48377.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-data-refs.c