https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89229
--- Comment #9 from H.J. Lu <hjl.tools at gmail dot com> ---
[hjl@gnu-4 i386]$ cat pr89229-2.c
/* { dg-do compile } */
/* { dg-options "-O2 -march=skylake-avx512" } */
typedef __int128 __m128t __attribute__ ((__vector_size__ (16), __may_alias__));
__m128t
foo (void)
{
register __int128 xmm16 __asm ("xmm16") = (__int128) -1;
asm volatile ("" : "+v" (xmm16));
return (__m128t) xmm16;
}
/* { dg-final { scan-assembler-not "%zmm\[0-9\]+" } } */
[hjl@gnu-4 i386]$ gcc -O2 -march=skylake-avx512 -S pr89229-2.c -o /tmp/x.s
[hjl@gnu-4 i386]$ cat /tmp/x.s
.file "pr89229-2.c"
.text
.p2align 4,,15
.globl foo
.type foo, @function
foo:
.LFB0:
.cfi_startproc
vpternlogd $0xFF, %zmm16, %zmm16, %zmm16 <<<<<<< Should be xmm16
vmovdqa64 %xmm16, %xmm0
ret
.cfi_endproc
.LFE0:
.size foo, .-foo
.ident "GCC: (GNU) 8.2.1 20190209 (Red Hat 8.2.1-8)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-4 i386]$
