1 ; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck %s
3 ; CHECK-LABEL: {{^}}test1:
4 ; CHECK: s_mov_b64 s[0:1], exec
5 ; CHECK: v_cndmask_b32_e64 v0, 0, 1, s[0:1]
7 ; Note: The hardware doesn't implement EXEC as src2 for v_cndmask.
9 ; Note: We could generate better code here if we recognized earlier that
10 ; there is no WQM use and therefore llvm.amdgcn.ps.live is constant. However,
11 ; the expectation is that the intrinsic will be used in non-trivial shaders,
12 ; so such an optimization doesn't seem worth the effort.
13 define amdgpu_ps float @test1() #0 {
14 %live = call i1 @llvm.amdgcn.ps.live()
15 %live.32 = zext i1 %live to i32
16 %r = bitcast i32 %live.32 to float
20 ; CHECK-LABEL: {{^}}test2:
21 ; CHECK: s_mov_b64 [[LIVE:s\[[0-9]+:[0-9]+\]]], exec
22 ; CHECK-DAG: s_wqm_b64 exec, exec
23 ; CHECK-DAG: v_cndmask_b32_e64 [[VAR:v[0-9]+]], 0, 1, [[LIVE]]
24 ; CHECK: image_sample v0, [[VAR]],
25 define amdgpu_ps float @test2() #0 {
26 %live = call i1 @llvm.amdgcn.ps.live()
27 %live.32 = zext i1 %live to i32
28 %live.32.bc = bitcast i32 %live.32 to float
29 %t = call <4 x float> @llvm.amdgcn.image.sample.1d.v4f32.f32(i32 15, float %live.32.bc, <8 x i32> undef, <4 x i32> undef, i1 0, i32 0, i32 0)
30 %r = extractelement <4 x float> %t, i32 0
34 ; CHECK-LABEL: {{^}}test3:
35 ; CHECK: s_mov_b64 [[LIVE:s\[[0-9]+:[0-9]+\]]], exec
36 ; CHECK-DAG: s_wqm_b64 exec, exec
37 ; CHECK-DAG: s_xor_b64 [[HELPER:s\[[0-9]+:[0-9]+\]]], [[LIVE]], -1
38 ; CHECK_DAG: s_and_saveexec_b64 [[SAVED:s\[[0-9]+:[0-9]+\]]], [[HELPER]]
40 define amdgpu_ps float @test3(i32 %in) #0 {
42 %live = call i1 @llvm.amdgcn.ps.live()
43 br i1 %live, label %end, label %dead
46 %tc.dead = mul i32 %in, 2
50 %tc = phi i32 [ %in, %entry ], [ %tc.dead, %dead ]
51 %tc.bc = bitcast i32 %tc to float
52 %t = call <4 x float> @llvm.amdgcn.image.sample.1d.v4f32.f32(i32 15, float %tc.bc, <8 x i32> undef, <4 x i32> undef, i1 0, i32 0, i32 0) #0
53 %r = extractelement <4 x float> %t, i32 0
57 declare i1 @llvm.amdgcn.ps.live() #1
58 declare <4 x float> @llvm.amdgcn.image.sample.1d.v4f32.f32(i32, float, <8 x i32>, <4 x i32>, i1, i32, i32) #2
60 attributes #0 = { nounwind }
61 attributes #1 = { nounwind readnone }
62 attributes #2 = { nounwind readonly }