1; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
2; RUN: opt < %s -analyze -enable-new-pm=0 -scalar-evolution -scalar-evolution-classify-expressions=0 | FileCheck %s
3; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-classify-expressions=0 2>&1 | FileCheck %s
4; PR4599
5
6target 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"
7
8define i32 @foo(i32 %ecx) nounwind {
9; CHECK-LABEL: 'foo'
10; CHECK-NEXT:  Determining loop execution counts for: @foo
11; CHECK-NEXT:  Loop %for.body: backedge-taken count is (-1 + %ecx)
12; CHECK-NEXT:  Loop %for.body: max backedge-taken count is -2
13; CHECK-NEXT:  Loop %for.body: Predicated backedge-taken count is (-1 + %ecx)
14; CHECK-NEXT:   Predicates:
15; CHECK:       Loop %for.body: Trip multiple is 1
16;
17entry:
18  %cmp2 = icmp eq i32 %ecx, 0		; <i1> [#uses=1]
19  br i1 %cmp2, label %for.end, label %bb.nph
20
21for.cond:		; preds = %for.inc
22  %cmp = icmp ult i32 %inc, %ecx		; <i1> [#uses=1]
23  br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
24
25for.cond.for.end_crit_edge:		; preds = %for.cond
26  %phitmp = add i32 %i.01, 2		; <i32> [#uses=1]
27  br label %for.end
28
29bb.nph:		; preds = %entry
30  br label %for.body
31
32for.body:		; preds = %bb.nph, %for.cond
33  %i.01 = phi i32 [ %inc, %for.cond ], [ 0, %bb.nph ]		; <i32> [#uses=3]
34  %call = call i32 @bar(i32 %i.01) nounwind		; <i32> [#uses=0]
35  br label %for.inc
36
37for.inc:		; preds = %for.body
38  %inc = add i32 %i.01, 1		; <i32> [#uses=2]
39  br label %for.cond
40
41for.end:		; preds = %for.cond.for.end_crit_edge, %entry
42  %i.0.lcssa = phi i32 [ %phitmp, %for.cond.for.end_crit_edge ], [ 1, %entry ]		; <i32> [#uses=1]
43  ret i32 %i.0.lcssa
44}
45
46declare i32 @bar(i32)
47