| Fiona Glaser | 16332ba | 2016-04-06 16:43:45 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -S -unroll-threshold=20 -loop-unroll -unroll-allow-partial -unroll-runtime | FileCheck %s |
| Zia Ansari | a82a58a4 | 2016-04-04 19:24:46 +0000 | [diff] [blame] | 2 | |
| 3 | ; The Loop TripCount is 9. However unroll factors 3 or 9 exceed given threshold. |
| 4 | ; The test checks that we choose a smaller, power-of-two, unroll count and do not give up on unrolling. |
| 5 | |
| 6 | ; CHECK: for.body: |
| 7 | ; CHECK: store |
| 8 | ; CHECK: for.body.1: |
| 9 | ; CHECK: store |
| 10 | |
| 11 | define void @foo(i32* nocapture %a, i32* nocapture readonly %b) nounwind uwtable { |
| 12 | entry: |
| 13 | br label %for.body |
| 14 | |
| 15 | for.body: ; preds = %for.body, %entry |
| 16 | %indvars.iv = phi i64 [ 1, %entry ], [ %indvars.iv.next, %for.body ] |
| 17 | %arrayidx = getelementptr inbounds i32, i32* %b, i64 %indvars.iv |
| 18 | %ld = load i32, i32* %arrayidx, align 4 |
| 19 | %idxprom1 = sext i32 %ld to i64 |
| 20 | %arrayidx2 = getelementptr inbounds i32, i32* %a, i64 %idxprom1 |
| 21 | %st = trunc i64 %indvars.iv to i32 |
| 22 | store i32 %st, i32* %arrayidx2, align 4 |
| 23 | %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| 24 | %exitcond = icmp eq i64 %indvars.iv.next, 10 |
| 25 | br i1 %exitcond, label %for.end, label %for.body |
| 26 | |
| 27 | for.end: ; preds = %for.body |
| 28 | ret void |
| 29 | } |