| Eric Christopher | cee313d | 2019-04-17 04:52:47 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -loop-reduce -S |
| 2 | |
| 3 | ; Test that SCEV insertpoint's don't get corrupted and cause an |
| 4 | ; invalid instruction to be inserted in a block other than its parent. |
| 5 | ; See http://reviews.llvm.org/D20703 for context. |
| 6 | define void @test() { |
| 7 | entry: |
| 8 | %bf.load = load i32, i32* null, align 4 |
| 9 | %bf.clear = lshr i32 %bf.load, 1 |
| 10 | %div = and i32 %bf.clear, 134217727 |
| 11 | %sub = add nsw i32 %div, -1 |
| 12 | %0 = zext i32 %sub to i64 |
| 13 | br label %while.cond |
| 14 | |
| 15 | while.cond: ; preds = %cond.end, %entry |
| 16 | %indvars.iv = phi i64 [ %indvars.iv.next, %cond.end ], [ 0, %entry ] |
| 17 | %cmp = icmp eq i64 %indvars.iv, %0 |
| 18 | br i1 %cmp, label %cleanup16, label %while.body |
| 19 | |
| 20 | while.body: ; preds = %while.cond |
| 21 | %1 = trunc i64 %indvars.iv to i32 |
| 22 | %mul = shl i32 %1, 1 |
| 23 | %add = add nuw i32 %mul, 2 |
| 24 | %cmp3 = icmp ult i32 %add, 0 |
| 25 | br i1 %cmp3, label %if.end, label %if.then |
| 26 | |
| 27 | if.then: ; preds = %while.body |
| 28 | unreachable |
| 29 | |
| 30 | if.end: ; preds = %while.body |
| 31 | br i1 false, label %cond.end, label %cond.true |
| 32 | |
| 33 | cond.true: ; preds = %if.end |
| 34 | br label %cond.end |
| 35 | |
| 36 | cond.end: ; preds = %cond.true, %if.end |
| 37 | %add7 = add i32 %1, 1 |
| 38 | %cmp12 = icmp ugt i32 %add7, %sub |
| 39 | %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| 40 | br i1 %cmp12, label %if.then13, label %while.cond |
| 41 | |
| 42 | if.then13: ; preds = %cond.end |
| 43 | unreachable |
| 44 | |
| 45 | cleanup16: ; preds = %while.cond |
| 46 | ret void |
| 47 | } |
