1 ; RUN: opt -mtriple=amdgcn-- -S -structurizecfg -si-annotate-control-flow %s | FileCheck -check-prefix=OPT %s
2 ; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
5 ; OPT-LABEL: @annotate_unreachable(
6 ; OPT: call { i1, i64 } @llvm.amdgcn.if.i64(
7 ; OPT-NOT: call void @llvm.amdgcn.end.cf
10 ; GCN-LABEL: {{^}}annotate_unreachable:
11 ; GCN: s_and_saveexec_b64
14 define amdgpu_kernel void @annotate_unreachable(<4 x float> addrspace(1)* noalias nocapture readonly %arg) #0 {
16 %tmp = tail call i32 @llvm.amdgcn.workitem.id.x()
20 %tmp2 = sext i32 %tmp to i64
21 %tmp3 = getelementptr inbounds <4 x float>, <4 x float> addrspace(1)* %arg, i64 %tmp2
22 %tmp4 = load <4 x float>, <4 x float> addrspace(1)* %tmp3, align 16
23 br i1 undef, label %bb3, label %bb5 ; label order reversed
26 %tmp6 = extractelement <4 x float> %tmp4, i32 2
27 %tmp7 = fcmp olt float %tmp6, 0.000000e+00
28 br i1 %tmp7, label %bb4, label %bb5
33 bb5: ; preds = %bb3, %bb1
37 declare i32 @llvm.amdgcn.workitem.id.x() #1
39 attributes #0 = { nounwind }
40 attributes #1 = { nounwind readnone }