https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88496
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
From PR 90202:
[hjl@gnu-cfl-1 pr90202]$ cat x.ii
struct v {
int val[16];
};
struct v test(struct v a, struct v b) {
struct v res;
for (int i = 0; i < 16; i++)
res.val[i] = a.val[i] + b.val[i];
return res;
}
[hjl@gnu-cfl-1 pr90202]$ make CC=gcc
gcc -O3 -march=skylake -S x.ii
[hjl@gnu-cfl-1 pr90202]$ cat x.s
.file "x.ii"
.text
.p2align 4,,15
.globl _Z4test1vS_
.type _Z4test1vS_, @function
_Z4test1vS_:
.LFB0:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rdi, %rax
movq %rsp, %rbp
.cfi_def_cfa_register 6
vmovdqu 16(%rbp), %ymm1
vmovdqu 48(%rbp), %ymm2
vpaddd 80(%rbp), %ymm1, %ymm0
vmovdqu %ymm0, (%rdi)
vpaddd 112(%rbp), %ymm2, %ymm0
vmovdqu %ymm0, 32(%rdi)
vzeroupper
popq %rbp
.cfi_def_cfa 7, 8
ret
.cfi_endproc
