| Sanjay Patel | b653de1 | 2014-09-10 17:58:16 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -dce |
| Nadav Rotem | e5dc57d | 2012-10-20 20:45:01 +0000 | [diff] [blame] | 2 | |
| 3 | ; Check that we don't fall into an infinite loop. |
| 4 | define void @test() nounwind { |
| 5 | entry: |
| 6 | br label %for.body |
| 7 | |
| 8 | for.body: |
| 9 | %0 = phi i32 [ 1, %entry ], [ 0, %for.body ] |
| 10 | br label %for.body |
| 11 | } |
| 12 | |
| Nadav Rotem | 7e1084d | 2012-10-21 02:38:01 +0000 | [diff] [blame] | 13 | |
| 14 | |
| 15 | define void @test2() nounwind { |
| 16 | entry: |
| 17 | br label %for.body |
| 18 | |
| 19 | for.body: ; preds = %for.body, %entry |
| 20 | %indvars.iv47 = phi i64 [ 0, %entry ], [ %indvars.iv.next48, %for.body ] |
| 21 | %0 = phi i32 [ 1, %entry ], [ 0, %for.body ] |
| 22 | %indvars.iv.next48 = add i64 %indvars.iv47, 1 |
| 23 | br i1 undef, label %for.end, label %for.body |
| 24 | |
| 25 | for.end: ; preds = %for.body |
| 26 | unreachable |
| 27 | } |
| Nadav Rotem | bd5d1d8 | 2012-12-24 01:22:06 +0000 | [diff] [blame] | 28 | |
| 29 | ;PR14701 |
| 30 | define void @start_model_rare() nounwind uwtable ssp { |
| 31 | entry: |
| 32 | br i1 undef, label %return, label %if.end |
| 33 | |
| 34 | if.end: ; preds = %entry |
| 35 | br i1 undef, label %cond.false, label %cond.true |
| 36 | |
| 37 | cond.true: ; preds = %if.end |
| 38 | unreachable |
| 39 | |
| 40 | cond.false: ; preds = %if.end |
| 41 | br i1 undef, label %cond.false28, label %cond.true20 |
| 42 | |
| 43 | cond.true20: ; preds = %cond.false |
| 44 | unreachable |
| 45 | |
| 46 | cond.false28: ; preds = %cond.false |
| 47 | br label %for.body40 |
| 48 | |
| 49 | for.body40: ; preds = %for.inc50, %cond.false28 |
| 50 | %indvars.iv123 = phi i64 [ 3, %cond.false28 ], [ %indvars.iv.next124, %for.inc50 ] |
| 51 | %step.0121 = phi i32 [ 1, %cond.false28 ], [ %step.1, %for.inc50 ] |
| 52 | br i1 undef, label %if.then46, label %for.inc50 |
| 53 | |
| 54 | if.then46: ; preds = %for.body40 |
| 55 | %inc47 = add nsw i32 %step.0121, 1 |
| 56 | br label %for.inc50 |
| 57 | |
| 58 | for.inc50: ; preds = %if.then46, %for.body40 |
| 59 | %k.1 = phi i32 [ undef, %for.body40 ], [ %inc47, %if.then46 ] |
| 60 | %step.1 = phi i32 [ %step.0121, %for.body40 ], [ %inc47, %if.then46 ] |
| 61 | %indvars.iv.next124 = add i64 %indvars.iv123, 1 |
| 62 | %lftr.wideiv = trunc i64 %indvars.iv.next124 to i32 |
| 63 | %exitcond = icmp eq i32 %lftr.wideiv, 256 |
| 64 | br i1 %exitcond, label %for.end52, label %for.body40 |
| 65 | |
| 66 | for.end52: ; preds = %for.inc50 |
| 67 | unreachable |
| 68 | |
| 69 | return: ; preds = %entry |
| 70 | ret void |
| 71 | } |