1*9880d681SAndroid Build Coastguard Worker; RUN: llc -verify-machineinstrs -o /dev/null %s 2*9880d681SAndroid Build Coastguard Worker; We may have subregister live ranges that are undefined on some paths. The 3*9880d681SAndroid Build Coastguard Worker; verifier should not complain about this. 4*9880d681SAndroid Build Coastguard Workertarget triple = "amdgcn--" 5*9880d681SAndroid Build Coastguard Worker 6*9880d681SAndroid Build Coastguard Workerdefine void @func() { 7*9880d681SAndroid Build Coastguard WorkerB0: 8*9880d681SAndroid Build Coastguard Worker br i1 undef, label %B1, label %B2 9*9880d681SAndroid Build Coastguard Worker 10*9880d681SAndroid Build Coastguard WorkerB1: 11*9880d681SAndroid Build Coastguard Worker br label %B2 12*9880d681SAndroid Build Coastguard Worker 13*9880d681SAndroid Build Coastguard WorkerB2: 14*9880d681SAndroid Build Coastguard Worker %v0 = phi <4 x float> [ zeroinitializer, %B1 ], [ <float 0.0, float 0.0, float 0.0, float undef>, %B0 ] 15*9880d681SAndroid Build Coastguard Worker br i1 undef, label %B30.1, label %B30.2 16*9880d681SAndroid Build Coastguard Worker 17*9880d681SAndroid Build Coastguard WorkerB30.1: 18*9880d681SAndroid Build Coastguard Worker %sub = fsub <4 x float> %v0, undef 19*9880d681SAndroid Build Coastguard Worker br label %B30.2 20*9880d681SAndroid Build Coastguard Worker 21*9880d681SAndroid Build Coastguard WorkerB30.2: 22*9880d681SAndroid Build Coastguard Worker %v3 = phi <4 x float> [ %sub, %B30.1 ], [ %v0, %B2 ] 23*9880d681SAndroid Build Coastguard Worker %ve0 = extractelement <4 x float> %v3, i32 0 24*9880d681SAndroid Build Coastguard Worker store float %ve0, float addrspace(3)* undef, align 4 25*9880d681SAndroid Build Coastguard Worker ret void 26*9880d681SAndroid Build Coastguard Worker} 27