| ; RUN: opt < %s -loop-reduce -S | grep phi | count 1 | |
| define void @foo(i32 %n) { | |
| entry: | |
| br label %loop | |
| loop: | |
| %i = phi i32 [ 0, %entry ], [ %i.next, %loop ] | |
| ; These three instructions form an isolated cycle and can be deleted. | |
| %j = phi i32 [ 0, %entry ], [ %j.y, %loop ] | |
| %j.x = add i32 %j, 1 | |
| %j.y = mul i32 %j.x, 2 | |
| %i.next = add i32 %i, 1 | |
| %c = icmp ne i32 %i.next, %n | |
| br i1 %c, label %loop, label %exit | |
| exit: | |
| ret void | |
| } |