| Dan Gohman | b1b77e7 | 2009-11-20 01:09:34 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -loop-unroll -unroll-count=2 -S | FileCheck %s |
| 2 | |
| 3 | ; LoopUnroll should unroll this loop into one big basic block. |
| 4 | |
| 5 | ; CHECK: for.body: |
| 6 | ; CHECK: %i.013 = phi i64 [ 0, %entry ], [ %tmp16.1, %for.body ] |
| 7 | ; CHECK: br i1 %exitcond.1, label %for.end, label %for.body |
| 8 | |
| 9 | define void @foo(double* nocapture %p, i64 %n) nounwind { |
| 10 | entry: |
| 11 | %mul10 = shl i64 %n, 1 ; <i64> [#uses=2] |
| 12 | br label %for.body |
| 13 | |
| 14 | for.body: ; preds = %entry, %for.body |
| 15 | %i.013 = phi i64 [ %tmp16, %for.body ], [ 0, %entry ] ; <i64> [#uses=2] |
| 16 | %arrayidx7 = getelementptr double* %p, i64 %i.013 ; <double*> [#uses=2] |
| 17 | %tmp16 = add i64 %i.013, 1 ; <i64> [#uses=3] |
| 18 | %arrayidx = getelementptr double* %p, i64 %tmp16 ; <double*> [#uses=1] |
| 19 | %tmp4 = load double* %arrayidx ; <double> [#uses=1] |
| 20 | %tmp8 = load double* %arrayidx7 ; <double> [#uses=1] |
| 21 | %mul9 = fmul double %tmp8, %tmp4 ; <double> [#uses=1] |
| 22 | store double %mul9, double* %arrayidx7 |
| 23 | %exitcond = icmp eq i64 %tmp16, %mul10 ; <i1> [#uses=1] |
| 24 | br i1 %exitcond, label %for.end, label %for.body |
| 25 | |
| 26 | for.end: ; preds = %for.body, %entry |
| 27 | ret void |
| 28 | } |