------- Comment #9 from bonzini at gnu dot org 2010-08-16 13:29 ------- The bug seems to be that an instruction clobbering the flags is inserted after the unspec.
140 {r127:SI=[r62:SI];[r62:SI]=unspec/v[[r62:SI],r128:SI,r129:SI] 11;flags:CCZ=cmp(unspec/v[[r62:SI],r128:SI,r129:SI] 11,r128:SI);} 141 {sp:SI=sp:SI+0x10;clobber flags:CC;} 142 r130:QI=flags:CCZ==0 -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45292