File: no-return-blocks.ll

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llvm-toolchain-9 1%3A9.0.1-16.1
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; RUN: opt %s -mtriple amdgcn-- -analyze -divergence | FileCheck %s

; CHECK: DIVERGENT:  %tmp5 = getelementptr inbounds float, float addrspace(1)* %arg, i64 %tmp2
; CHECK: DIVERGENT:  %tmp10 = load volatile float, float addrspace(1)* %tmp5, align 4
; CHECK: DIVERGENT:  %tmp11 = load volatile float, float addrspace(1)* %tmp5, align 4

; The post dominator tree does not have a root node in this case
define amdgpu_kernel void @no_return_blocks(float addrspace(1)* noalias nocapture readonly %arg, float addrspace(1)* noalias nocapture readonly %arg1) #0 {
bb0:
  %tmp = tail call i32 @llvm.amdgcn.workitem.id.x() #0
  %tmp2 = sext i32 %tmp to i64
  %tmp5 = getelementptr inbounds float, float addrspace(1)* %arg, i64 %tmp2
  %tmp6 = load volatile float, float addrspace(1)* %tmp5, align 4
  %tmp8 = fcmp olt float %tmp6, 0.000000e+00
  br i1 %tmp8, label %bb1, label %bb2

bb1:
  %tmp10 = load volatile float, float addrspace(1)* %tmp5, align 4
  br label %bb2

bb2:
  %tmp11 = load volatile float, float addrspace(1)* %tmp5, align 4
  br label %bb1
}

; Function Attrs: nounwind readnone
declare i32 @llvm.amdgcn.workitem.id.x() #1

attributes #0 = { nounwind }
attributes #1 = { nounwind readnone }