[gcc r14-3962] LoongArch: Add tests for ASX xvldrepl/xvstelm instruction generation.

[gcc r14-3962] LoongArch: Add tests for ASX xvldrepl/xvstelm instruction generation.

[LuluCheng]

https://gcc.gnu.org/g:efba540049550ea72cb5d89cc4e213a5b9b2bf48

commit r14-3962-gefba540049550ea72cb5d89cc4e213a5b9b2bf48
Author: Xiaolong Chen <chenxiaolong@loongson.cn>
Date:   Tue Sep 12 16:00:48 2023 +0800

    LoongArch: Add tests for ASX xvldrepl/xvstelm instruction generation.
    
    gcc/testsuite/ChangeLog:
    
            * gcc.target/loongarch/vector/lasx/lasx-xvldrepl.c: New test.
            * gcc.target/loongarch/vector/lasx/lasx-xvstelm.c: New test.

Diff:
---
 .../gcc.target/loongarch/vector/lasx/lasx-xvldrepl.c     | 16 ++++++++++++++++
 .../gcc.target/loongarch/vector/lasx/lasx-xvstelm.c      | 14 ++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/gcc/testsuite/gcc.target/loongarch/vector/lasx/lasx-xvldrepl.c b/gcc/testsuite/gcc.target/loongarch/vector/lasx/lasx-xvldrepl.c
new file mode 100644
index 000000000000..10556795119b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/vector/lasx/lasx-xvldrepl.c
@@ -0,0 +1,16 @@
+/* { dg-do compile } */
+/* { dg-options "-O3 -mlasx" } */
+/* { dg-final { scan-assembler-times "xvldrepl.w" 2} } */
+
+#define N 258
+
+float a[N], b[N], c[N];
+
+void
+test ()
+{
+  for (int i = 0; i < 256; i++)
+    {
+      a[i] = c[0] * b[i] + c[1];
+    }
+}
diff --git a/gcc/testsuite/gcc.target/loongarch/vector/lasx/lasx-xvstelm.c b/gcc/testsuite/gcc.target/loongarch/vector/lasx/lasx-xvstelm.c
new file mode 100644
index 000000000000..1a7b0e86f8ba
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/vector/lasx/lasx-xvstelm.c
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-options "-O3 -mlasx" } */
+/* { dg-final { scan-assembler-times "xvstelm.w" 8} } */
+
+#define LEN 256
+
+float a[LEN], b[LEN], c[LEN];
+
+void
+test ()
+{
+  for (int i = 0; i < LEN; i += 2)
+    a[i] = b[i] + c[i];
+}