| ; RUN: llvm-as < %s | opt -gvn -enable-pre | llvm-dis | grep {b.pre} | |
| define i32 @main(i32 %p) { | |
| block1: | |
| br i1 true, label %block2, label %block3 | |
| block2: | |
| %a = add i32 %p, 1 | |
| br label %block4 | |
| block3: | |
| br label %block4 | |
| block4: | |
| %b = add i32 %p, 1 | |
| ret i32 %b | |
| } |