forked from OSchip/llvm-project
57 lines
2.3 KiB
LLVM
57 lines
2.3 KiB
LLVM
; RUN: opt -o /dev/null -structurizecfg %s
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; The following function caused an infinite loop inside the structurizer's
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; rebuildSSA routine, where we were iterating over an instruction's uses while
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; modifying the use list, without taking care to do this safely.
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target triple = "amdgcn--"
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define amdgpu_vs void @wrapper(i32 inreg %arg, i32 %arg1) {
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main_body:
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%tmp = add i32 %arg1, %arg
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%tmp2 = call <4 x float> @llvm.amdgcn.buffer.load.format.v4f32(<4 x i32> undef, i32 %tmp, i32 0, i1 false, i1 false)
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%tmp3 = extractelement <4 x float> %tmp2, i32 1
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%tmp4 = fptosi float %tmp3 to i32
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%tmp5 = insertelement <2 x i32> undef, i32 %tmp4, i32 1
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br label %loop11.i
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loop11.i: ; preds = %endif46.i, %main_body
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%tmp6 = phi i32 [ 0, %main_body ], [ %tmp14, %endif46.i ]
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%tmp7 = icmp sgt i32 %tmp6, 999
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br i1 %tmp7, label %main.exit, label %if16.i
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if16.i: ; preds = %loop11.i
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%tmp8 = call <4 x float> @llvm.amdgcn.image.load.v4f32.v2i32.v8i32(<2 x i32> %tmp5, <8 x i32> undef, i32 15, i1 true, i1 false, i1 false, i1 false)
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%tmp9 = extractelement <4 x float> %tmp8, i32 0
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%tmp10 = fcmp ult float 0.000000e+00, %tmp9
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br i1 %tmp10, label %if28.i, label %endif46.i
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if28.i: ; preds = %if16.i
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%tmp11 = bitcast float %tmp9 to i32
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%tmp12 = shl i32 %tmp11, 16
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%tmp13 = bitcast i32 %tmp12 to float
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br label %main.exit
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endif46.i: ; preds = %if16.i
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%tmp14 = add i32 %tmp6, 1
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br label %loop11.i
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main.exit: ; preds = %if28.i, %loop11.i
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%tmp15 = phi float [ %tmp13, %if28.i ], [ 0x36F0800000000000, %loop11.i ]
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call void @llvm.amdgcn.exp.f32(i32 32, i32 15, float %tmp15, float 0.000000e+00, float 0.000000e+00, float 0x36A0000000000000, i1 false, i1 false) #0
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ret void
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}
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; Function Attrs: nounwind
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declare void @llvm.amdgcn.exp.f32(i32, i32, float, float, float, float, i1, i1) #0
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; Function Attrs: nounwind readnone
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declare <4 x float> @llvm.amdgcn.buffer.load.format.v4f32(<4 x i32>, i32, i32, i1, i1) #2
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; Function Attrs: nounwind readonly
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declare <4 x float> @llvm.amdgcn.image.load.v4f32.v2i32.v8i32(<2 x i32>, <8 x i32>, i32, i1, i1, i1, i1) #2
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attributes #0 = { nounwind }
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attributes #1 = { nounwind readnone }
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attributes #2 = { nounwind readonly }
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