From: H.J. Lu <hjl.tools@gmail.com>
Date: Mon, 8 Dec 2025 05:32:55 +0000 (+0800)
Subject: x86: Compile avx2-vpcmpgtq-1.c with -fno-fuse-ops-with-volatile-access
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bde7cf998666c449f353d928c9cb70de776c7555;p=thirdparty%2Fgcc.git

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 7a983808b10..5e6f4310517 100644
--- 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>