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