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.
6define void @test() {
7entry:
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
15while.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
20while.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
27if.then:                                          ; preds = %while.body
28  unreachable
29
30if.end:                                           ; preds = %while.body
31  br i1 false, label %cond.end, label %cond.true
32
33cond.true:                                        ; preds = %if.end
34  br label %cond.end
35
36cond.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
42if.then13:                                        ; preds = %cond.end
43  unreachable
44
45cleanup16:                                        ; preds = %while.cond
46  ret void
47}
48