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 = insertelement <4 x i32> %tmp2, i32 %tmp1, i32 1
38 %tmp3.cast = bitcast <4 x i32> %tmp3 to <4 x float>
39 %tmp4 = call <4 x float> @llvm.amdgcn.image.sample.v4f32.v4f32.v8i32(<4 x float> %tmp3.cast, <8 x i32> undef, <4 x i32> undef, i32 15, i1 false, i1 false, i1 false, i1 false, i1 false)
40 %tmp5 = extractelement <4 x float> %tmp4, i32 0
41 %tmp6 = fmul float %tmp5, undef
42 %tmp7 = fadd float %tmp6, %tmp6
43 %tmp8 = insertelement <4 x i32> %tmp2, i32 %tmp, i32 1
44 store <4 x i32> %tmp8, <4 x i32> addrspace(1)* undef, align 16
45 store float %tmp7, float addrspace(1)* undef, align 4
48 bb9: ; preds = %bb9, %bb
49 %tmp10 = icmp eq i32 %tmp, 0
50 br i1 %tmp10, label %bb9, label %bb11
53 store <4 x i32> %tmp2, <4 x i32> addrspace(1)* undef, align 16
57 ; FIXME: Should be able to remove the undef copies
59 ; CHECK-LABEL: {{^}}partially_undef_copy:
60 ; CHECK: v_mov_b32_e32 v5, 5
61 ; CHECK: v_mov_b32_e32 v6, 6
63 ; CHECK: v_mov_b32_e32 v[[OUTPUT_LO:[0-9]+]], v5
66 ; CHECK: v_mov_b32_e32 v1, v6
69 ; CHECK: v_mov_b32_e32 v2, v7
71 ; CHECK: v_mov_b32_e32 v[[OUTPUT_HI:[0-9]+]], v8
72 ; CHECK: v_mov_b32_e32 v[[OUTPUT_LO]], v6
74 ; CHECK: buffer_store_dwordx4 v{{\[}}[[OUTPUT_LO]]:[[OUTPUT_HI]]{{\]}}
75 define amdgpu_kernel void @partially_undef_copy() #0 {
76 %tmp0 = call i32 asm sideeffect "v_mov_b32_e32 v5, 5", "={v5}"()
77 %tmp1 = call i32 asm sideeffect "v_mov_b32_e32 v6, 6", "={v6}"()
79 %partially.undef.0 = insertelement <4 x i32> undef, i32 %tmp0, i32 0
80 %partially.undef.1 = insertelement <4 x i32> %partially.undef.0, i32 %tmp1, i32 0
82 store volatile <4 x i32> %partially.undef.1, <4 x i32> addrspace(1)* undef, align 16
83 tail call void asm sideeffect "v_nop", "v={v[5:8]}"(<4 x i32> %partially.undef.0)
87 declare <4 x float> @llvm.amdgcn.image.sample.v4f32.v4f32.v8i32(<4 x float>, <8 x i32>, <4 x i32>, i32, i1, i1, i1, i1, i1) #1
89 attributes #0 = { nounwind }
90 attributes #1 = { nounwind readonly }