1 ; RUN: opt < %s -S -passes="default<O2>" -unroll-runtime=true -unroll-threshold-default=0 -unroll-threshold-aggressive=300 | FileCheck %s -check-prefix=O2
2 ; RUN: opt < %s -S -passes="default<O3>" -unroll-runtime=true -unroll-threshold-default=0 -unroll-threshold-aggressive=300 | FileCheck %s -check-prefix=O3
3 ; RUN: opt < %s -S -passes="default<Os>" -unroll-runtime=true -unroll-threshold-default=0 -unroll-threshold-aggressive=300 | FileCheck %s -check-prefix=Os
4 ; RUN: opt < %s -S -passes="default<Oz>" -unroll-runtime=true -unroll-threshold-default=0 -unroll-threshold-aggressive=300 | FileCheck %s -check-prefix=Oz
6 ; Check that Os and Oz are optimized like O2, not like O3. To easily highlight
7 ; the behavior, we artificially disable unrolling for anything but O3 by setting
8 ; the default threshold to 0.
11 ; O2-NOT: loop1.preheader
12 ; Os-NOT: loop1.preheader
13 ; Oz-NOT: loop1.preheader
15 define void @unroll(i32 %iter, i32* %addr1, i32* %addr2) nounwind {
20 %iv1 = phi i32 [ 0, %entry ], [ %inc1, %loop1.latch ]
21 %offset1 = getelementptr i32, i32* %addr1, i32 %iv1
22 store i32 %iv1, i32* %offset1, align 4
23 br label %loop2.header
26 %e = icmp uge i32 %iter, 1
27 br i1 %e, label %loop2, label %exit2
30 %iv2 = phi i32 [ 0, %loop2.header ], [ %inc2, %loop2 ]
31 %offset2 = getelementptr i32, i32* %addr2, i32 %iv2
32 store i32 %iv2, i32* %offset2, align 4
33 %inc2 = add i32 %iv2, 1
34 %exitcnd2 = icmp uge i32 %inc2, %iter
35 br i1 %exitcnd2, label %exit2, label %loop2
41 %inc1 = add i32 %iv1, 1
42 %exitcnd1 = icmp uge i32 %inc1, 1024
43 br i1 %exitcnd1, label %exit, label %loop1