1 ; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck %s
2 ; We may have subregister live ranges that are undefined on some paths. The
3 ; verifier should not complain about this.
6 ; CHECK-LABEL: {{^}}func:
7 define amdgpu_kernel void @func() #0 {
9 br i1 undef, label %B1, label %B2
15 %v0 = phi <4 x float> [ zeroinitializer, %B1 ], [ <float 0.0, float 0.0, float 0.0, float undef>, %B0 ]
16 br i1 undef, label %B30.1, label %B30.2
19 %sub = fsub <4 x float> %v0, undef
23 %v3 = phi <4 x float> [ %sub, %B30.1 ], [ %v0, %B2 ]
24 %ve0 = extractelement <4 x float> %v3, i32 0
25 store float %ve0, float addrspace(3)* undef, align 4
29 ; FIXME: Extra undef subregister copy should be removed before
30 ; overwritten with defined copy
31 ; CHECK-LABEL: {{^}}valley_partially_undef_copy:
32 define amdgpu_ps float @valley_partially_undef_copy() #0 {
34 %tmp = load volatile i32, i32 addrspace(1)* undef, align 4
35 %tmp1 = load volatile i32, i32 addrspace(1)* undef, align 4
36 %tmp2 = insertelement <4 x i32> undef, i32 %tmp1, i32 0
37 %tmp3 = bitcast i32 %tmp1 to float
38 %tmp4 = call <4 x float> @llvm.amdgcn.image.sample.2d.v4f32.f32(i32 15, float %tmp3, float %tmp3, <8 x i32> undef, <4 x i32> undef, i1 0, i32 0, i32 0)
39 %tmp5 = extractelement <4 x float> %tmp4, i32 0
40 %tmp6 = fmul float %tmp5, undef
41 %tmp7 = fadd float %tmp6, %tmp6
42 %tmp8 = insertelement <4 x i32> %tmp2, i32 %tmp, i32 1
43 store <4 x i32> %tmp8, <4 x i32> addrspace(1)* undef, align 16
44 store float %tmp7, float addrspace(1)* undef, align 4
47 bb9: ; preds = %bb9, %bb
48 %tmp10 = icmp eq i32 %tmp, 0
49 br i1 %tmp10, label %bb9, label %bb11
52 store <4 x i32> %tmp2, <4 x i32> addrspace(1)* undef, align 16
56 ; FIXME: Should be able to remove the undef copies
58 ; CHECK-LABEL: {{^}}partially_undef_copy:
59 ; CHECK: v_mov_b32_e32 v5, 5
60 ; CHECK-DAG: v_mov_b32_e32 v6, 6
62 ; CHECK-DAG: v_mov_b32_e32 v[[OUTPUT_LO:[0-9]+]], v5
65 ; CHECK-DAG: v_mov_b32_e32 v1, v6
68 ; CHECK-DAG: v_mov_b32_e32 v2, v7
70 ; CHECK-DAG: v_mov_b32_e32 v[[OUTPUT_HI:[0-9]+]], v8
71 ; CHECK-DAG: v_mov_b32_e32 v[[OUTPUT_LO]], v6
73 ; CHECK: buffer_store_dwordx4 v{{\[}}[[OUTPUT_LO]]:[[OUTPUT_HI]]{{\]}}
74 define amdgpu_kernel void @partially_undef_copy() #0 {
75 %tmp0 = call i32 asm sideeffect "v_mov_b32_e32 v5, 5", "={v5}"()
76 %tmp1 = call i32 asm sideeffect "v_mov_b32_e32 v6, 6", "={v6}"()
78 %partially.undef.0 = insertelement <4 x i32> undef, i32 %tmp0, i32 0
79 %partially.undef.1 = insertelement <4 x i32> %partially.undef.0, i32 %tmp1, i32 0
81 store volatile <4 x i32> %partially.undef.1, <4 x i32> addrspace(1)* undef, align 16
82 tail call void asm sideeffect "v_nop", "v={v[5:8]}"(<4 x i32> %partially.undef.0)
86 declare <4 x float> @llvm.amdgcn.image.sample.2d.v4f32.f32(i32, float, float, <8 x i32>, <4 x i32>, i1, i32, i32) #1
88 attributes #0 = { nounwind }
89 attributes #1 = { nounwind readonly }