1; REQUIRES: asserts
2; RUN: opt < %s -S -Os -debug -debug-only=loop-rotate 2>&1 | FileCheck %s -check-prefix=OS
3; RUN: opt < %s -S -Oz -debug -debug-only=loop-rotate 2>&1 | FileCheck %s -check-prefix=OZ
4
5; Loop should be rotated for -Os but not for -Oz.
6; OS: rotating Loop at depth 1
7; OZ-NOT: rotating Loop at depth 1
8
9@e = global i32 10
10
11declare void @use(i32)
12
13define void @test() {
14entry:
15  %end = load i32, i32* @e
16  br label %loop
17
18loop:
19  %n.phi = phi i32 [ %n, %loop.fin ], [ 0, %entry ]
20  %cond = icmp eq i32 %n.phi, %end
21  br i1 %cond, label %exit, label %loop.fin
22
23loop.fin:
24  %n = add i32 %n.phi, 1
25  call void @use(i32 %n)
26  br label %loop
27
28exit:
29  ret void
30}
31