blob: d1ba9a845800df3f960eee7e1afcd7d15d7f7472 [file] [log] [blame]
; RUN: llc < %s
; Examples that exhibits a bug in DAGCombine. The case is triggered by the
; following program. The bug is DAGCombine assumes that the bit convert
; preserves the number of elements so the optimization code tries to read
; through the 3rd mask element, which doesn't exist.
define i32 @update(<2 x i64> %val1, <2 x i64> %val2) nounwind readnone {
%shuf = shufflevector <2 x i64> %val1, <2 x i64> %val2, <2 x i32> <i32 0, i32 3>
%bit = bitcast <2 x i64> %shuf to <4 x i32>
%res = extractelement <4 x i32> %bit, i32 3
ret i32 %res