| ; RUN: opt < %s -loop-reduce -S |
| |
| ; Test that SCEV insertpoint's don't get corrupted and cause an |
| ; invalid instruction to be inserted in a block other than its parent. |
| ; See http://reviews.llvm.org/D20703 for context. |
| define void @test() { |
| entry: |
| %bf.load = load i32, ptr null, align 4 |
| %bf.clear = lshr i32 %bf.load, 1 |
| %div = and i32 %bf.clear, 134217727 |
| %sub = add nsw i32 %div, -1 |
| %0 = zext i32 %sub to i64 |
| br label %while.cond |
| |
| while.cond: ; preds = %cond.end, %entry |
| %indvars.iv = phi i64 [ %indvars.iv.next, %cond.end ], [ 0, %entry ] |
| %cmp = icmp eq i64 %indvars.iv, %0 |
| br i1 %cmp, label %cleanup16, label %while.body |
| |
| while.body: ; preds = %while.cond |
| %1 = trunc i64 %indvars.iv to i32 |
| %mul = shl i32 %1, 1 |
| %add = add nuw i32 %mul, 2 |
| %cmp3 = icmp ult i32 %add, 0 |
| br i1 %cmp3, label %if.end, label %if.then |
| |
| if.then: ; preds = %while.body |
| unreachable |
| |
| if.end: ; preds = %while.body |
| br i1 false, label %cond.end, label %cond.true |
| |
| cond.true: ; preds = %if.end |
| br label %cond.end |
| |
| cond.end: ; preds = %cond.true, %if.end |
| %add7 = add i32 %1, 1 |
| %cmp12 = icmp ugt i32 %add7, %sub |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| br i1 %cmp12, label %if.then13, label %while.cond |
| |
| if.then13: ; preds = %cond.end |
| unreachable |
| |
| cleanup16: ; preds = %while.cond |
| ret void |
| } |
