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1; RUN: opt < %s -indvars -S | not grep select
2
3; This loop has backedge-taken-count zero. Indvars shouldn't expand any
4; instructions to compute a trip count.
5
6target 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"
7target triple = "i386-pc-linux-gnu"
8
9define i8* @string_expandtabs() nounwind {
10entry:
11	br i1 undef, label %bb33, label %bb1
12
13bb1:		; preds = %entry
14	br i1 undef, label %overflow1, label %bb15
15
16bb15:		; preds = %bb1
17	br i1 undef, label %bb33, label %bb17
18
19bb17:		; preds = %bb15
20	br label %bb30
21
22bb19:		; preds = %bb30
23	br i1 undef, label %bb20, label %bb29
24
25bb20:		; preds = %bb19
26	%0 = load i32, i32* undef, align 4		; <i32> [#uses=1]
27	%1 = sub i32 %0, undef		; <i32> [#uses=1]
28	br label %bb23
29
30bb21:		; preds = %bb23
31	%2 = icmp ult i8* %q.0, undef		; <i1> [#uses=1]
32	br i1 %2, label %bb22, label %overflow2
33
34bb22:		; preds = %bb21
35	%3 = getelementptr i8, i8* %q.0, i32 1		; <i8*> [#uses=1]
36	br label %bb23
37
38bb23:		; preds = %bb22, %bb20
39	%i.2 = phi i32 [ %1, %bb20 ], [ %4, %bb22 ]		; <i32> [#uses=1]
40	%q.0 = phi i8* [ undef, %bb20 ], [ %3, %bb22 ]		; <i8*> [#uses=3]
41	%4 = add i32 %i.2, -1		; <i32> [#uses=2]
42	%5 = icmp eq i32 %4, -1		; <i1> [#uses=1]
43	br i1 %5, label %bb29, label %bb21
44
45bb29:		; preds = %bb23, %bb19
46	%q.1 = phi i8* [ undef, %bb19 ], [ %q.0, %bb23 ]		; <i8*> [#uses=0]
47	br label %bb30
48
49bb30:		; preds = %bb29, %bb17
50	br i1 undef, label %bb19, label %bb33
51
52overflow2:		; preds = %bb21
53	br i1 undef, label %bb32, label %overflow1
54
55bb32:		; preds = %overflow2
56	br label %overflow1
57
58overflow1:		; preds = %bb32, %overflow2, %bb1
59	ret i8* null
60
61bb33:		; preds = %bb30, %bb15, %entry
62	ret i8* undef
63}
64