--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.rcp.legacy.ll	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,42 @@
+; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
+; RUN: not llc -march=amdgcn -mcpu=fiji -verify-machineinstrs < %s 2>&1 | FileCheck -check-prefix=ERROR %s
+
+; ERROR: error: <unknown>:0:0: in function rcp_legacy_f32 void (float addrspace(1)*, float): intrinsic not supported on subtarget
+
+declare float @llvm.amdgcn.rcp.legacy(float) #0
+
+; GCN-LABEL: {{^}}rcp_legacy_f32:
+; GCN: v_rcp_legacy_f32_e32 {{v[0-9]+}}, {{s[0-9]+}}
+define amdgpu_kernel void @rcp_legacy_f32(float addrspace(1)* %out, float %src) #1 {
+  %rcp = call float @llvm.amdgcn.rcp.legacy(float %src) #0
+  store float %rcp, float addrspace(1)* %out, align 4
+  ret void
+}
+
+; TODO: Really these should be constant folded
+; GCN-LABEL: {{^}}rcp_legacy_f32_constant_4.0
+; GCN: v_rcp_legacy_f32_e32 {{v[0-9]+}}, 4.0
+define amdgpu_kernel void @rcp_legacy_f32_constant_4.0(float addrspace(1)* %out) #1 {
+  %rcp = call float @llvm.amdgcn.rcp.legacy(float 4.0) #0
+  store float %rcp, float addrspace(1)* %out, align 4
+  ret void
+}
+
+; GCN-LABEL: {{^}}rcp_legacy_f32_constant_100.0
+; GCN: v_rcp_legacy_f32_e32 {{v[0-9]+}}, 0x42c80000
+define amdgpu_kernel void @rcp_legacy_f32_constant_100.0(float addrspace(1)* %out) #1 {
+  %rcp = call float @llvm.amdgcn.rcp.legacy(float 100.0) #0
+  store float %rcp, float addrspace(1)* %out, align 4
+  ret void
+}
+
+; GCN-LABEL: {{^}}rcp_legacy_undef_f32:
+; GCN-NOT: v_rcp_legacy_f32
+define amdgpu_kernel void @rcp_legacy_undef_f32(float addrspace(1)* %out) #1 {
+  %rcp = call float @llvm.amdgcn.rcp.legacy(float undef)
+  store float %rcp, float addrspace(1)* %out, align 4
+  ret void
+}
+
+attributes #0 = { nounwind readnone }
+attributes #1 = { nounwind }