[gcc r14-8445] LoongArch: testsuite:Added additional vectorization "-mlsx" option.

[gcc r14-8445] LoongArch: testsuite:Added additional vectorization "-mlsx" option.

[LuluCheng]

https://gcc.gnu.org/g:9e7947a66737c43cdec026b1f9c8149c5eba6c40

commit r14-8445-g9e7947a66737c43cdec026b1f9c8149c5eba6c40
Author: chenxiaolong <chenxiaolong@loongson.cn>
Date:   Fri Jan 26 14:22:31 2024 +0800

    LoongArch: testsuite:Added additional vectorization "-mlsx" option.
    
    gcc/testsuite/ChangeLog:
    
            * gcc.dg/signbit-2.c: Added additional "-mlsx" compilation options.
            * gfortran.dg/graphite/vect-pr40979.f90: Dito.
            * gfortran.dg/vect/fast-math-mgrid-resid.f: Dito.

Diff:
---
 gcc/testsuite/gcc.dg/signbit-2.c                       | 1 +
 gcc/testsuite/gfortran.dg/graphite/vect-pr40979.f90    | 1 +
 gcc/testsuite/gfortran.dg/vect/fast-math-mgrid-resid.f | 1 +
 3 files changed, 3 insertions(+)

diff --git a/gcc/testsuite/gcc.dg/signbit-2.c b/gcc/testsuite/gcc.dg/signbit-2.c
index 62bb4047d742..5511bb781498 100644
--- a/gcc/testsuite/gcc.dg/signbit-2.c
+++ b/gcc/testsuite/gcc.dg/signbit-2.c
@@ -5,6 +5,7 @@
 /* { dg-additional-options "-msse2 -mno-avx512f" { target { i?86-*-* x86_64-*-* } } } */
 /* { dg-additional-options "-march=armv8-a" { target aarch64_sve } } */
 /* { dg-additional-options "-maltivec" { target powerpc_altivec_ok } } */
+/* { dg-additional-options "-mlsx" { target loongarch_sx } } */
 /* { dg-skip-if "no fallback for MVE" { arm_mve } } */
 
 #include <stdint.h>
diff --git a/gcc/testsuite/gfortran.dg/graphite/vect-pr40979.f90 b/gcc/testsuite/gfortran.dg/graphite/vect-pr40979.f90
index a42290948c4e..6f2ad1166a4e 100644
--- a/gcc/testsuite/gfortran.dg/graphite/vect-pr40979.f90
+++ b/gcc/testsuite/gfortran.dg/graphite/vect-pr40979.f90
@@ -1,6 +1,7 @@
 ! { dg-do compile }
 ! { dg-require-effective-target vect_double }
 ! { dg-additional-options "-msse2" { target { { i?86-*-* x86_64-*-* } && ilp32 } } }
+! { dg-additional-options "-mlsx" { target { loongarch*-*-* } } }
 
 module mqc_m
 integer, parameter, private :: longreal = selected_real_kind(15,90)
diff --git a/gcc/testsuite/gfortran.dg/vect/fast-math-mgrid-resid.f b/gcc/testsuite/gfortran.dg/vect/fast-math-mgrid-resid.f
index 08965cc5e202..97b888217310 100644
--- a/gcc/testsuite/gfortran.dg/vect/fast-math-mgrid-resid.f
+++ b/gcc/testsuite/gfortran.dg/vect/fast-math-mgrid-resid.f
@@ -2,6 +2,7 @@
 ! { dg-require-effective-target vect_double }
 ! { dg-options "-O3 --param vect-max-peeling-for-alignment=0 -fpredictive-commoning -fdump-tree-pcom-details -std=legacy" }
 ! { dg-additional-options "-mprefer-avx128" { target { i?86-*-* x86_64-*-* } } }
+! { dg-additional-options "-mlsx" { target { loongarch*-*-* } } }
 ! { dg-additional-options "-mzarch" { target { s390*-*-* } } }
 
 ******* RESID COMPUTES THE RESIDUAL:  R = V - AU