1 files changed, 39 insertions, 0 deletions
diff --git a/test/CodeGen/AMDGPU/llvm.amdgcn.rsq.legacy.ll b/test/CodeGen/AMDGPU/llvm.amdgcn.rsq.legacy.ll
new file mode 100644
index 000000000000..47bd0d82b834
--- /dev/null
+++ b/test/CodeGen/AMDGPU/llvm.amdgcn.rsq.legacy.ll
@@ -0,0 +1,39 @@
+; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
+
+declare float @llvm.amdgcn.rsq.legacy(float) #0
+
+; FUNC-LABEL: {{^}}rsq_legacy_f32:
+; SI: v_rsq_legacy_f32_e32 {{v[0-9]+}}, {{s[0-9]+}}
+define void @rsq_legacy_f32(float addrspace(1)* %out, float %src) #1 {
+  %rsq = call float @llvm.amdgcn.rsq.legacy(float %src) #0
+  store float %rsq, float addrspace(1)* %out, align 4
+  ret void
+}
+
+; TODO: Really these should be constant folded
+; FUNC-LABEL: {{^}}rsq_legacy_f32_constant_4.0
+; SI: v_rsq_legacy_f32_e32 {{v[0-9]+}}, 4.0
+define void @rsq_legacy_f32_constant_4.0(float addrspace(1)* %out) #1 {
+  %rsq = call float @llvm.amdgcn.rsq.legacy(float 4.0) #0
+  store float %rsq, float addrspace(1)* %out, align 4
+  ret void
+}
+
+; FUNC-LABEL: {{^}}rsq_legacy_f32_constant_100.0
+; SI: v_rsq_legacy_f32_e32 {{v[0-9]+}}, 0x42c80000
+define void @rsq_legacy_f32_constant_100.0(float addrspace(1)* %out) #1 {
+  %rsq = call float @llvm.amdgcn.rsq.legacy(float 100.0) #0
+  store float %rsq, float addrspace(1)* %out, align 4
+  ret void
+}
+
+; FUNC-LABEL: {{^}}rsq_legacy_undef_f32:
+; SI-NOT: v_rsq_legacy_f32
+define void @rsq_legacy_undef_f32(float addrspace(1)* %out) #1 {
+  %rsq = call float @llvm.amdgcn.rsq.legacy(float undef)
+  store float %rsq, float addrspace(1)* %out, align 4
+  ret void
+}
+
+attributes #0 = { nounwind readnone }
+attributes #1 = { nounwind }