1 ; RUN: opt < %s -loop-reduce -S | grep phi | count 1 2 3 define void @foo(i32 %n) { 4 entry: 5 br label %loop 6 7 loop: 8 %i = phi i32 [ 0, %entry ], [ %i.next, %loop ] 9 10 ; These three instructions form an isolated cycle and can be deleted. 11 %j = phi i32 [ 0, %entry ], [ %j.y, %loop ] 12 %j.x = add i32 %j, 1 13 %j.y = mul i32 %j.x, 2 14 15 %i.next = add i32 %i, 1 16 %c = icmp ne i32 %i.next, %n 17 br i1 %c, label %loop, label %exit 18 19 exit: 20 ret void 21 } 22
