[Bug c/52577] __builtin_shuffle -Wunused-but-set-* false positives

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52577

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-03-13 08:59:11 UTC ---
Created attachment 26884
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26884
gcc47-pr52577.patch

Untested fix.