http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46295
Summary: Missing vzeroupper
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: hjl.to...@gmail.com
CC: ubiz...@gmail.com
[...@gnu-6 969]$ cat z.i
typedef double VECTOR[3];
typedef double EXPRESS[5];
void Parse_Rel_Factor (EXPRESS Express,int *Terms);
void Parse_Vector (VECTOR Vector)
{
EXPRESS Express;
int Terms;
for (Terms = 0; Terms < 5; Terms++)
Express[Terms] = 0.0;
Parse_Rel_Factor(Express,&Terms);
}
[...@gnu-6 969]$ make z.s
/export/build/gnu/gcc-avx256/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc-avx256/build-x86_64-linux/gcc/ -O3 -funroll-loops
-ffast-math -mavx -S z.i
[...@gnu-6 969]$ cat z.s
.file "z.i"
.text
.p2align 4,,15
.globl Parse_Vector
.type Parse_Vector, @function
Parse_Vector:
.LFB0:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
vxorpd %xmm0, %xmm0, %xmm0
movq %rsp, %rbp
.cfi_def_cfa_register 6
andq $-32, %rsp
subq $64, %rsp
leaq 60(%rsp), %rsi
movq %rsp, %rdi
vmovapd %ymm0, (%rsp)
movq $0, 32(%rsp)
movl $5, 60(%rsp)
call Parse_Rel_Factor
leave
.cfi_def_cfa 7, 8
ret
.cfi_endproc
.LFE0:
.size Parse_Vector, .-Parse_Vector
.ident "GCC: (GNU) 4.6.0 20101103 (experimental)"
.section .note.GNU-stack,"",@progbits
[...@gnu-6 969]$
