These 2 testcases were originally designed for the default -march= of
x86_64 so if you pass -march=native (on a target with AVX512 enabled),
they will fail. It fix this, we add `-mno-sse3 -mprefer-vector-width=512`
to the options to force a specific arch to the testcase.

Tested on a skylake-avx512 machine with -march=native.

        PR testsuite/120643
gcc/testsuite/ChangeLog:

        * gcc.target/i386/vect-pragma-target-1.c: Add `-mno-sse3 
-mprefer-vector-width=512`
        to the options.
        * gcc.target/i386/vect-pragma-target-2.c: Likewise.

Signed-off-by: Andrew Pinski <quic_apin...@quicinc.com>
---
 gcc/testsuite/gcc.target/i386/vect-pragma-target-1.c | 2 +-
 gcc/testsuite/gcc.target/i386/vect-pragma-target-2.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/testsuite/gcc.target/i386/vect-pragma-target-1.c 
b/gcc/testsuite/gcc.target/i386/vect-pragma-target-1.c
index f5e71e453ec..8f7d3d9b63d 100644
--- a/gcc/testsuite/gcc.target/i386/vect-pragma-target-1.c
+++ b/gcc/testsuite/gcc.target/i386/vect-pragma-target-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target { i?86-*-* x86_64-*-* } } }                 */
-/* { dg-options "-O0" }                                                 */
+/* { dg-options "-O0 -mno-sse3 -mprefer-vector-width=512" }             */
 /* { dg-final { scan-assembler-times "paddd.+xmm\[0-9]+"        1 } }   */
 /* { dg-final { scan-assembler-times "vfmadd132ps.+ymm\[0-9]+"  1 } }   */
 /* { dg-final { scan-assembler-times "vpaddw.+zmm\[0-9]+"       1 } }   */
diff --git a/gcc/testsuite/gcc.target/i386/vect-pragma-target-2.c 
b/gcc/testsuite/gcc.target/i386/vect-pragma-target-2.c
index 349680453a4..925d662b02b 100644
--- a/gcc/testsuite/gcc.target/i386/vect-pragma-target-2.c
+++ b/gcc/testsuite/gcc.target/i386/vect-pragma-target-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target { i?86-*-* x86_64-*-* } } }                 */
-/* { dg-options "-O0" }                                                 */
+/* { dg-options "-O0 -mno-sse3 -mprefer-vector-width=512" }             */
 /* { dg-final { scan-assembler-times "paddd.+xmm\[0-9]+"        1 } }   */
 /* { dg-final { scan-assembler-times "vfmadd132ps.+ymm\[0-9]+"  1 } }   */
 /* { dg-final { scan-assembler-times "vpaddw.+zmm\[0-9]+"       1 } }   */
-- 
2.43.0

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