http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46519
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> 2010-11-18 00:26:18 UTC --- Created attachment 22437 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22437 A testcase With -O3 -funroll-loops -ffast-math -mavx: movl Token_Id(%rip), %eax vmovapd 32(%rsp), %ymm0 cmpl $1, %eax je .L4 cmpl $2, %eax je .L5 testl %eax, %eax jne .L464 leaq 124(%rsp), %rsi leaq 64(%rsp), %rdi call _Z16Parse_Rel_FactorPdPi <<<< Missing vzeroupper movl 124(%rsp), %esi .L856: vmovapd %ymm0, 32(%rsp) call _Z9Get_Tokenv <<<< Missing vzeroupper movl Token_Id(%rip), %eax vmovapd 32(%rsp), %ymm0 ... .L491: leaq 252(%rsp), %rsi leaq 64(%rsp), %rdi vmovapd %ymm0, 32(%rsp) call _ZL14Parse_Rel_TermPdPi <<<< Missing vzeroupper movl 252(%rsp), %esi movl 224(%rsp), %edx vmovapd 32(%rsp), %ymm0 cmpl %edx, %esi
