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In this situation: %VGPR2<def> = BUFFER_LOAD_DWORD_OFFSET %SGPR8_SGPR9_SGPR10_SGPR11, %VGPR7<def,tied3> = V_MAC_F32_e32 %VGPR0<undef>, %VGPR1<kill>, %VGPR7<kill,tied0>, %EXEC<imp-use> %VGPR3_VGPR4_VGPR5_VGPR6<def> = COPY %VGPR0_VGPR1_VGPR2_VGPR3 %VGPR4<def> = COPY %VGPR2 The copy for VGPR1 -> VGPR4 was an error from reading undefined VGPR1, but VGPR4 is defined immediately after this copy. llvm-svn: 275635
91 lines
3.1 KiB
LLVM
91 lines
3.1 KiB
LLVM
; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck %s
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; We may have subregister live ranges that are undefined on some paths. The
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; verifier should not complain about this.
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; CHECK-LABEL: {{^}}func:
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define void @func() #0 {
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B0:
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br i1 undef, label %B1, label %B2
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B1:
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br label %B2
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B2:
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%v0 = phi <4 x float> [ zeroinitializer, %B1 ], [ <float 0.0, float 0.0, float 0.0, float undef>, %B0 ]
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br i1 undef, label %B30.1, label %B30.2
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B30.1:
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%sub = fsub <4 x float> %v0, undef
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br label %B30.2
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B30.2:
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%v3 = phi <4 x float> [ %sub, %B30.1 ], [ %v0, %B2 ]
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%ve0 = extractelement <4 x float> %v3, i32 0
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store float %ve0, float addrspace(3)* undef, align 4
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ret void
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}
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; FIXME: Extra undef subregister copy should be removed before
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; overwritten with defined copy
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; CHECK-LABEL: {{^}}valley_partially_undef_copy:
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define amdgpu_ps float @valley_partially_undef_copy() #0 {
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bb:
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%tmp = load volatile i32, i32 addrspace(1)* undef, align 4
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%tmp1 = load volatile i32, i32 addrspace(1)* undef, align 4
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%tmp2 = insertelement <4 x i32> undef, i32 %tmp1, i32 0
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%tmp3 = insertelement <4 x i32> %tmp2, i32 %tmp1, i32 1
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%tmp4 = call <4 x float> @llvm.SI.image.sample.v4i32(<4 x i32> %tmp3, <8 x i32> undef, <4 x i32> undef, i32 15, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0)
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%tmp5 = extractelement <4 x float> %tmp4, i32 0
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%tmp6 = fmul float %tmp5, undef
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%tmp7 = fadd float %tmp6, %tmp6
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%tmp8 = insertelement <4 x i32> %tmp2, i32 %tmp, i32 1
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store <4 x i32> %tmp8, <4 x i32> addrspace(1)* undef, align 16
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store float %tmp7, float addrspace(1)* undef, align 4
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br label %bb9
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bb9: ; preds = %bb9, %bb
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%tmp10 = icmp eq i32 %tmp, 0
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br i1 %tmp10, label %bb9, label %bb11
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bb11: ; preds = %bb9
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store <4 x i32> %tmp2, <4 x i32> addrspace(1)* undef, align 16
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ret float undef
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}
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; FIXME: Should be able to remove the undef copies
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; CHECK-LABEL: {{^}}partially_undef_copy:
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; CHECK: v_mov_b32_e32 v5, 5
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; CHECK: v_mov_b32_e32 v6, 6
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; CHECK: v_mov_b32_e32 v[[OUTPUT_LO:[0-9]+]], v5
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; Undef copy
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; CHECK: v_mov_b32_e32 v1, v6
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; undef copy
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; CHECK: v_mov_b32_e32 v2, v7
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; CHECK: v_mov_b32_e32 v[[OUTPUT_HI:[0-9]+]], v8
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; CHECK: v_mov_b32_e32 v[[OUTPUT_LO]], v6
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; CHECK: buffer_store_dwordx4 v{{\[}}[[OUTPUT_LO]]:[[OUTPUT_HI]]{{\]}}
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define void @partially_undef_copy() #0 {
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%tmp0 = call i32 asm sideeffect "v_mov_b32_e32 v5, 5", "={VGPR5}"()
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%tmp1 = call i32 asm sideeffect "v_mov_b32_e32 v6, 6", "={VGPR6}"()
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%partially.undef.0 = insertelement <4 x i32> undef, i32 %tmp0, i32 0
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%partially.undef.1 = insertelement <4 x i32> %partially.undef.0, i32 %tmp1, i32 0
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store volatile <4 x i32> %partially.undef.1, <4 x i32> addrspace(1)* undef, align 16
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tail call void asm sideeffect "v_nop", "v={VGPR5_VGPR6_VGPR7_VGPR8}"(<4 x i32> %partially.undef.0)
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ret void
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}
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declare <4 x float> @llvm.SI.image.sample.v4i32(<4 x i32>, <8 x i32>, <4 x i32>, i32, i32, i32, i32, i32, i32, i32, i32) #1
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declare float @llvm.SI.image.sample.i32(i32, <8 x i32>, <4 x i32>, i32, i32, i32, i32, i32, i32, i32, i32) #1
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attributes #0 = { nounwind }
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attributes #1 = { nounwind readnone }
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