1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.target/aarch64/vsqrt-1.c b/gcc/testsuite/gcc.target/aarch64/vsqrt-1.c
new file mode 100644
index 0000000..e614c7d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/vsqrt-1.c
@@ -0,0 +1,17 @@
+/* PR target/64821 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+/* Check that we constant fold sqrt(4.0) into 2.0. */
+/* { dg-final { scan-tree-dump-not " \\\.SQRT" "optimized" } } */
+/* { dg-final { scan-tree-dump " 2\\\.0e\\\+0" "optimized" } } */
+/* { dg-final { scan-assembler-not "fsqrt" } } */
+/* We should produce a fmov to d0 with 2.0 but currently don't, see PR 103959. */
+/* { dg-final { scan-assembler-times "\n\tfmov\td0, 2.0e.0" 1 { xfail *-*-* } } } */
+
+#include <arm_neon.h>
+
+float64x1_t f64(void)
+{
+   float64x1_t a = (float64x1_t){4.0};
+   return vsqrt_f64 (a);
+}