| Kevin Qin | 49bc764 | 2015-03-12 05:36:01 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -S -O2 -unroll-runtime=true | FileCheck %s |
| 2 | |
| 3 | ; Check runtime unrolling prologue can be promoted by LICM pass. |
| 4 | |
| 5 | ; CHECK: entry: |
| 6 | ; CHECK: %xtraiter |
| 7 | ; CHECK: %lcmp.mod |
| 8 | ; CHECK: loop1: |
| 9 | ; CHECK: br i1 %lcmp.mod |
| 10 | ; CHECK: loop2.prol: |
| 11 | |
| 12 | define void @unroll(i32 %iter, i32* %addr1, i32* %addr2) nounwind { |
| 13 | entry: |
| 14 | br label %loop1 |
| 15 | |
| 16 | loop1: |
| 17 | %iv1 = phi i32 [ 0, %entry ], [ %inc1, %loop1.latch ] |
| 18 | %offset1 = getelementptr i32, i32* %addr1, i32 %iv1 |
| 19 | store i32 %iv1, i32* %offset1, align 4 |
| 20 | br label %loop2.header |
| 21 | |
| 22 | loop2.header: |
| Sanjoy Das | e178f46 | 2015-04-14 03:20:38 +0000 | [diff] [blame] | 23 | %e = icmp uge i32 %iter, 1 |
| 24 | br i1 %e, label %loop2, label %exit2 |
| Kevin Qin | 49bc764 | 2015-03-12 05:36:01 +0000 | [diff] [blame] | 25 | |
| 26 | loop2: |
| 27 | %iv2 = phi i32 [ 0, %loop2.header ], [ %inc2, %loop2 ] |
| 28 | %offset2 = getelementptr i32, i32* %addr2, i32 %iv2 |
| 29 | store i32 %iv2, i32* %offset2, align 4 |
| 30 | %inc2 = add i32 %iv2, 1 |
| 31 | %exitcnd2 = icmp uge i32 %inc2, %iter |
| 32 | br i1 %exitcnd2, label %exit2, label %loop2 |
| 33 | |
| 34 | exit2: |
| 35 | br label %loop1.latch |
| 36 | |
| 37 | loop1.latch: |
| 38 | %inc1 = add i32 %iv1, 1 |
| 39 | %exitcnd1 = icmp uge i32 %inc1, 1024 |
| 40 | br i1 %exitcnd1, label %exit, label %loop1 |
| 41 | |
| 42 | exit: |
| 43 | ret void |
| 44 | } |