https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87743
Bug ID: 87743
Summary: Vectorizer doesn't support conversion of different
sizes
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
[hjl@gnu-efi-2 prpr87317]$ cat x.c
#define MAX 4
long long int dst[MAX];
int src[MAX];
void
foo (void)
{
int i;
for (i = 0; i < MAX; i++)
dst[i] = src[i];
}
[hjl@gnu-efi-2 prpr87317]$ gcc -S -O3 -march=haswell x.c
[hjl@gnu-efi-2 prpr87317]$ cat x.s
.file "x.c"
.text
.p2align 4,,15
.globl foo
.type foo, @function
foo:
.LFB0:
.cfi_startproc
movslq src(%rip), %rax
movslq src+8(%rip), %rcx
movslq src+12(%rip), %rdx
vmovq %rax, %xmm0
movslq src+4(%rip), %rax
vmovq %rcx, %xmm1
vpinsrq $1, %rdx, %xmm1, %xmm1
vpinsrq $1, %rax, %xmm0, %xmm0
vinserti128 $0x1, %xmm1, %ymm0, %ymm0
vmovdqu %ymm0, dst(%rip)
vzeroupper
ret
.cfi_endproc
.LFE0:
.size foo, .-foo
.comm src,16,16
.comm dst,32,32
.ident "GCC: (GNU) 8.2.1 20181011 (Red Hat 8.2.1-4)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-efi-2 prpr87317]$
