x86: Compile avx2-vpcmpgtq-1.c with -fno-fuse-ops-with-volatile-access

When -march=cascadelake is added, we generate

	vmovdqa	x(%rip), %ymm0
	vpcmpq	$1, x(%rip), %ymm0, %k0
	vpmovm2q	%k0, %ymm0
	vmovdqa	%ymm0, x(%rip)

instead of

	vmovdqa	x(%rip), %ymm1
	vmovdqa	x(%rip), %ymm0
	vpcmpgtq	%ymm1, %ymm0, %ymm0
	vmovdqa	%ymm0, x(%rip)

Compile avx2-vpcmpgtq-1.c with -fno-fuse-ops-with-volatile-access to
generate vpcmpgtq instead of vpcmpq.

	PR target/122343
	* gcc.target/i386/avx2-vpcmpgtq-1.c: Compile with
	-fno-fuse-ops-with-volatile-access.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>

diff --git a/gcc/testsuite/gcc.target/i386/avx2-vpcmpgtq-1.c b/gcc/testsuite/gcc.target/i386/avx2-vpcmpgtq-1.c
index 7a983808b10c0b7d15a8dc9ad4d0ef917f730cb2..5e6f43105170a6576aed9cc5e19d12cfea0612b0 100644 (file)
--- a/gcc/testsuite/gcc.target/i386/avx2-vpcmpgtq-1.c
+++ b/gcc/testsuite/gcc.target/i386/avx2-vpcmpgtq-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-mavx2 -O2" } */
+/* { dg-options "-mavx2 -O2 -fno-fuse-ops-with-volatile-access" } */
 /* { dg-final { scan-assembler "vpcmpgtq\[ \\t\]+\[^\n\]*%ymm\[0-9\]" } } */
 
 #include <immintrin.h>