forked from OSchip/llvm-project
22 lines
443 B
LLVM
22 lines
443 B
LLVM
; 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
|
|
}
|