1; RUN: opt < %s -indvars
2; PR4258
3target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32"
4target triple = "i386-pc-linux-gnu"
5
6define void @0(i32*, i32*, i32, i32) nounwind {
7	br i1 false, label %bb.nph1.preheader, label %.outer._crit_edge
8
9bb.nph1.preheader:		; preds = %4
10	%smax = select i1 false, i32 -1, i32 0		; <i32> [#uses=1]
11	%tmp12 = sub i32 0, %smax		; <i32> [#uses=1]
12	br label %bb.nph1
13
14bb.nph1:		; preds = %.outer, %bb.nph1.preheader
15	br i1 undef, label %bb.nph3.preheader, label %.outer
16
17bb.nph3.preheader:		; preds = %bb.nph1
18	br label %bb.nph3
19
20bb.nph3:		; preds = %bb.nph3, %bb.nph3.preheader
21	%indvar7 = phi i32 [ %indvar.next8, %bb.nph3 ], [ 0, %bb.nph3.preheader ]		; <i32> [#uses=3]
22	%tmp9 = mul i32 %indvar7, -1		; <i32> [#uses=1]
23	%tmp13 = add i32 %tmp9, %tmp12		; <i32> [#uses=1]
24	%tmp14 = add i32 %tmp13, -2		; <i32> [#uses=1]
25	%5 = icmp sgt i32 %tmp14, 0		; <i1> [#uses=1]
26	%indvar.next8 = add i32 %indvar7, 1		; <i32> [#uses=1]
27	br i1 %5, label %bb.nph3, label %.outer.loopexit
28
29.outer.loopexit:		; preds = %bb.nph3
30	%indvar7.lcssa = phi i32 [ %indvar7, %bb.nph3 ]		; <i32> [#uses=0]
31	br label %.outer
32
33.outer:		; preds = %.outer.loopexit, %bb.nph1
34	br i1 undef, label %bb.nph1, label %.outer._crit_edge.loopexit
35
36.outer._crit_edge.loopexit:		; preds = %.outer
37	br label %.outer._crit_edge
38
39.outer._crit_edge:		; preds = %.outer._crit_edge.loopexit, %4
40	ret void
41}
42