| Michael Kuperstein | 230867e | 2017-01-19 00:42:28 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -S | FileCheck %s |
| 2 | ; We vectorize the inner loop, so we have to put it in LCSSA form. |
| 3 | ; However, there's no reason to touch the outer loop. |
| 4 | |
| 5 | ; CHECK-LABEL: @foo |
| 6 | ; CHECK-LABEL: for.end.inner.loopexit: |
| 7 | ; CHECK: %[[LCSSAPHI:.*]] = phi i64 [ %indvars.iv, %for.body.inner ], [ %{{.*}}, %middle.block ] |
| 8 | ; CHECK: store i64 %[[LCSSAPHI]], i64* %O1, align 4 |
| 9 | ; CHECK-LABEL: for.end.outer.loopexit |
| 10 | ; CHECK: store i64 %indvars.outer, i64* %O2, align 4 |
| 11 | |
| 12 | |
| 13 | define i64 @foo(i32* nocapture %A, i32* nocapture %B, i64 %n, i64 %m, i64* %O1, i64* %O2) { |
| 14 | entry: |
| 15 | %cmp = icmp sgt i64 %n, 0 |
| 16 | br i1 %cmp, label %for.body.outer.preheader, label %for.end.outer |
| 17 | |
| 18 | for.body.outer.preheader: ; preds = %entry |
| 19 | br label %for.body.outer |
| 20 | |
| 21 | for.body.outer: ; preds = %for.body.outer.preheader, %for.end.inner |
| 22 | %indvars.outer = phi i64 [ %indvars.outer.next, %for.end.inner ], [ 0, %for.body.outer.preheader ] |
| 23 | %cmp2 = icmp sgt i64 %m, 0 |
| 24 | br i1 %cmp2, label %for.body.inner.preheader, label %for.end.inner |
| 25 | |
| 26 | for.body.inner.preheader: ; preds = %for.body.outer |
| 27 | br label %for.body.inner |
| 28 | |
| 29 | for.body.inner: ; preds = %for.body.inner.preheader, %for.body.inner |
| 30 | %indvars.iv = phi i64 [ %indvars.iv.next, %for.body.inner ], [ 0, %for.body.inner.preheader ] |
| 31 | %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv |
| 32 | %v = load i32, i32* %arrayidx, align 4 |
| 33 | %arrayidx2 = getelementptr inbounds i32, i32* %B, i64 %indvars.iv |
| 34 | store i32 %v, i32* %arrayidx2, align 4 |
| 35 | %indvars.iv.next = add i64 %indvars.iv, 1 |
| 36 | %exitcond = icmp eq i64 %indvars.iv, %n |
| 37 | br i1 %exitcond, label %for.end.inner.loopexit, label %for.body.inner |
| 38 | |
| 39 | for.end.inner.loopexit: ; preds = %for.body.inner |
| 40 | store i64 %indvars.iv, i64 *%O1, align 4 |
| 41 | br label %for.end.inner |
| 42 | |
| 43 | for.end.inner: ; preds = %for.end.inner.loopexit, %for.body.outer |
| 44 | %indvars.outer.next = add i64 %indvars.outer, 1 |
| 45 | %exitcond.outer = icmp eq i64 %indvars.outer, %m |
| 46 | br i1 %exitcond.outer, label %for.end.outer.loopexit, label %for.body.outer |
| 47 | |
| 48 | for.end.outer.loopexit: ; preds = %for.end.inner |
| 49 | store i64 %indvars.outer, i64 *%O2, align 4 |
| 50 | br label %for.end.outer |
| 51 | |
| 52 | for.end.outer: ; preds = %for.end.outer.loopexit, %entry |
| 53 | ret i64 undef |
| 54 | } |