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; RUN: opt < %s -S -passes='default<Os>' -debug -debug-only=loop-rotate 2>&1 | FileCheck %s -check-prefix=OS 5; RUN: opt < %s -S -passes='default<Oz>' -debug -debug-only=loop-rotate 2>&1 | FileCheck %s -check-prefix=OZ 6 7;; Make sure -allow-loop-header-duplication overrides the default behavior at Oz 8; RUN: opt < %s -S -passes='default<Oz>' -enable-loop-header-duplication -debug -debug-only=loop-rotate 2>&1 | FileCheck %s -check-prefix=OS 9 10; Loop should be rotated for -Os but not for -Oz. 11; OS: rotating Loop at depth 1 12; OZ-NOT: rotating Loop at depth 1 13 14@e = global i32 10 15 16declare void @use(i32) 17 18define void @test() { 19entry: 20 %end = load i32, ptr @e 21 br label %loop 22 23loop: 24 %n.phi = phi i32 [ %n, %loop.fin ], [ 0, %entry ] 25 %cond = icmp eq i32 %n.phi, %end 26 br i1 %cond, label %exit, label %loop.fin 27 28loop.fin: 29 %n = add i32 %n.phi, 1 30 call void @use(i32 %n) 31 br label %loop 32 33exit: 34 ret void 35} 36