1; RUN: opt < %s -gvn -S | not grep {%z2 =} 2 3define i32 @main() { 4block1: 5 %z1 = bitcast i32 0 to i32 6 br label %block2 7block2: 8 %z2 = bitcast i32 0 to i32 9 ret i32 %z2 10} 11