1*9880d681SAndroid Build Coastguard Worker; RUN: llc < %s 2*9880d681SAndroid Build Coastguard Worker; REQUIRES: default_triple 3*9880d681SAndroid Build Coastguard Worker 4*9880d681SAndroid Build Coastguard Worker; Examples that exhibits a bug in DAGCombine. The case is triggered by the 5*9880d681SAndroid Build Coastguard Worker; following program. The bug is DAGCombine assumes that the bit convert 6*9880d681SAndroid Build Coastguard Worker; preserves the number of elements so the optimization code tries to read 7*9880d681SAndroid Build Coastguard Worker; through the 3rd mask element, which doesn't exist. 8*9880d681SAndroid Build Coastguard Workerdefine i32 @update(<2 x i64> %val1, <2 x i64> %val2) nounwind readnone { 9*9880d681SAndroid Build Coastguard Workerentry: 10*9880d681SAndroid Build Coastguard Worker %shuf = shufflevector <2 x i64> %val1, <2 x i64> %val2, <2 x i32> <i32 0, i32 3> 11*9880d681SAndroid Build Coastguard Worker %bit = bitcast <2 x i64> %shuf to <4 x i32> 12*9880d681SAndroid Build Coastguard Worker %res = extractelement <4 x i32> %bit, i32 3 13*9880d681SAndroid Build Coastguard Worker ret i32 %res 14*9880d681SAndroid Build Coastguard Worker} 15