1; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s
2; PR4599
3
4target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
5
6; CHECK: Loop %for.body: backedge-taken count is (-1 + {{%?}}ecx)
7
8define i32 @foo(i32 %ecx) nounwind {
9entry:
10	%cmp2 = icmp eq i32 %ecx, 0		; <i1> [#uses=1]
11	br i1 %cmp2, label %for.end, label %bb.nph
12
13for.cond:		; preds = %for.inc
14	%cmp = icmp ult i32 %inc, %ecx		; <i1> [#uses=1]
15	br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
16
17for.cond.for.end_crit_edge:		; preds = %for.cond
18	%phitmp = add i32 %i.01, 2		; <i32> [#uses=1]
19	br label %for.end
20
21bb.nph:		; preds = %entry
22	br label %for.body
23
24for.body:		; preds = %bb.nph, %for.cond
25	%i.01 = phi i32 [ %inc, %for.cond ], [ 0, %bb.nph ]		; <i32> [#uses=3]
26	%call = call i32 @bar(i32 %i.01) nounwind		; <i32> [#uses=0]
27	br label %for.inc
28
29for.inc:		; preds = %for.body
30	%inc = add i32 %i.01, 1		; <i32> [#uses=2]
31	br label %for.cond
32
33for.end:		; preds = %for.cond.for.end_crit_edge, %entry
34	%i.0.lcssa = phi i32 [ %phitmp, %for.cond.for.end_crit_edge ], [ 1, %entry ]		; <i32> [#uses=1]
35	ret i32 %i.0.lcssa
36}
37
38declare i32 @bar(i32)
39