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