37 lines
1.2 KiB
LLVM
37 lines
1.2 KiB
LLVM
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; RUN: opt -mtriple amdgcn-unknown-amdhsa -analyze -divergence -use-gpu-divergence-analysis %s | FileCheck %s
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; CHECK: bb3:
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; CHECK: DIVERGENT: %Guard.bb4 = phi i1 [ true, %bb1 ], [ false, %bb2 ]
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; CHECK: DIVERGENT: br i1 %Guard.bb4, label %bb4, label %bb5
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; Function Attrs: nounwind readnone speculatable
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declare i32 @llvm.amdgcn.workitem.id.x() #0
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define protected amdgpu_kernel void @test() {
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bb0:
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%tid.x = call i32 @llvm.amdgcn.workitem.id.x()
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%i5 = icmp eq i32 %tid.x, -1
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br label %bb1
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bb1: ; preds = %bb2, %bb0
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%lsr.iv = phi i32 [ 7, %bb0 ], [ %lsr.iv.next, %bb2 ]
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br i1 %i5, label %bb2, label %bb3
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bb2: ; preds = %bb1
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%lsr.iv.next = add nsw i32 %lsr.iv, -1
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%i14 = icmp eq i32 %lsr.iv.next, 0
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br i1 %i14, label %bb3, label %bb1
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bb3: ; preds = %bb2, %bb1
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%Guard.bb4 = phi i1 [ true, %bb1 ], [ false, %bb2 ]
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br i1 %Guard.bb4, label %bb4, label %bb5
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bb4: ; preds = %bb3
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br label %bb5
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bb5: ; preds = %bb3, %bb4
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ret void
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}
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attributes #0 = { nounwind readnone speculatable }
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