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-max-iterations=0  -scalar-evolution-classify-expressions=0  | FileCheck %s
3; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-max-iterations=0  -scalar-evolution-classify-expressions=0  2>&1 | FileCheck %s
4
5target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
6target triple = "x86_64-unknown-linux-gnu"
7
8@A = weak global [1000 x i32] zeroinitializer, align 32
9
10define void @PR1101(i32 %N) {
11; CHECK-LABEL: 'PR1101'
12; CHECK-NEXT:  Determining loop execution counts for: @PR1101
13; CHECK-NEXT:  Loop %bb3: backedge-taken count is 10000
14; CHECK-NEXT:  Loop %bb3: max backedge-taken count is 10000
15; CHECK-NEXT:  Loop %bb3: Predicated backedge-taken count is 10000
16; CHECK-NEXT:   Predicates:
17; CHECK:       Loop %bb3: Trip multiple is 10001
18;
19entry:
20  br label %bb3
21
22bb:             ; preds = %bb3
23  %tmp = getelementptr [1000 x i32], [1000 x i32]* @A, i32 0, i32 %i.0          ; <i32*> [#uses=1]
24  store i32 123, i32* %tmp
25  %tmp2 = add i32 %i.0, 1         ; <i32> [#uses=1]
26  br label %bb3
27
28bb3:            ; preds = %bb, %entry
29  %i.0 = phi i32 [ 0, %entry ], [ %tmp2, %bb ]            ; <i32> [#uses=3]
30  %tmp3 = icmp sle i32 %i.0, 9999          ; <i1> [#uses=1]
31  br i1 %tmp3, label %bb, label %bb5
32
33bb5:            ; preds = %bb3
34  br label %return
35
36return:         ; preds = %bb5
37  ret void
38}
39
40define i32 @PR22795() {
41; CHECK-LABEL: 'PR22795'
42; CHECK-NEXT:  Determining loop execution counts for: @PR22795
43; CHECK-NEXT:  Loop %preheader: backedge-taken count is 7
44; CHECK-NEXT:  Loop %preheader: max backedge-taken count is 7
45; CHECK-NEXT:  Loop %preheader: Predicated backedge-taken count is 7
46; CHECK-NEXT:   Predicates:
47; CHECK:       Loop %preheader: Trip multiple is 8
48;
49entry:
50  %bins = alloca [16 x i64], align 16
51  %0 = bitcast [16 x i64]* %bins to i8*
52  call void @llvm.memset.p0i8.i64(i8* align 16 %0, i8 0, i64 128, i1 false)
53  br label %preheader
54
55preheader:                                        ; preds = %for.inc.1, %entry
56  %v11 = phi i64 [ 0, %entry ], [ %next12.1, %for.inc.1 ]
57  %iv = phi i32 [ -1, %entry ], [ %next.1, %for.inc.1 ]
58  %cmp = icmp sgt i64 %v11, 0
59  br i1 %cmp, label %for.body, label %for.inc
60
61for.body:                                         ; preds = %preheader
62  %zext = zext i32 %iv to i64
63  %arrayidx = getelementptr [16 x i64], [16 x i64]* %bins, i64 0, i64 %v11
64  %loaded = load i64, i64* %arrayidx, align 8
65  %add = add i64 %loaded, 1
66  %add2 = add i64 %add, %zext
67  store i64 %add2, i64* %arrayidx, align 8
68  br label %for.inc
69
70for.inc:                                          ; preds = %for.body, %preheader
71  %next12 = add nuw nsw i64 %v11, 1
72  %next = add nsw i32 %iv, 1
73  br i1 true, label %for.body.1, label %for.inc.1
74
75end:                                              ; preds = %for.inc.1
76  %arrayidx8 = getelementptr [16 x i64], [16 x i64]* %bins, i64 0, i64 2
77  %load = load i64, i64* %arrayidx8, align 16
78  %shr4 = lshr i64 %load, 32
79  %conv = trunc i64 %shr4 to i32
80  ret i32 %conv
81
82for.body.1:                                       ; preds = %for.inc
83  %zext.1 = zext i32 %next to i64
84  %arrayidx.1 = getelementptr [16 x i64], [16 x i64]* %bins, i64 0, i64 %next12
85  %loaded.1 = load i64, i64* %arrayidx.1, align 8
86  %add.1 = add i64 %loaded.1, 1
87  %add2.1 = add i64 %add.1, %zext.1
88  store i64 %add2.1, i64* %arrayidx.1, align 8
89  br label %for.inc.1
90
91for.inc.1:                                        ; preds = %for.body.1, %for.inc
92  %next12.1 = add nuw nsw i64 %next12, 1
93  %next.1 = add nuw nsw i32 %next, 1
94  %exitcond.1 = icmp eq i64 %next12.1, 16
95  br i1 %exitcond.1, label %end, label %preheader
96}
97
98; Function Attrs: nounwind
99declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1) #0
100
101declare void @may_exit() nounwind
102
103define void @pr28012(i32 %n) {
104; CHECK-LABEL: 'pr28012'
105; CHECK-NEXT:  Determining loop execution counts for: @pr28012
106; CHECK-NEXT:  Loop %loop: backedge-taken count is -1431655751
107; CHECK-NEXT:  Loop %loop: max backedge-taken count is -1431655751
108; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is -1431655751
109; CHECK-NEXT:   Predicates:
110; CHECK:       Loop %loop: Trip multiple is 2863311546
111;
112entry:
113  br label %loop
114
115loop:
116  %iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ]
117  %iv.inc = add nsw i32 %iv, 3
118  call void @may_exit()
119  %becond = icmp ne i32 %iv.inc, 46
120  br i1 %becond, label %loop, label %leave
121
122leave:
123  ret void
124}
125