[Bug tree-optimization/52285] [4.7 Regression] libgcrypt _gcry_burn_stack slowdown

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52285

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-02-16 
18:25:24 UTC ---
While it will slow down this exact testcase even more, I think tailr/tailc
passes should ignore CLOBBER stmts.