1; RUN: opt < %s -scalar-evolution -analyze -enable-new-pm=0 | FileCheck %s
2; RUN: opt < %s "-passes=print<scalar-evolution>" -disable-output 2>&1 | FileCheck %s
3
4define void @test1(i32 %n) {
5entry:
6  %s = mul i32 %n, 96
7  br label %loop
8loop:
9  %i = phi i32 [ 0, %entry ], [ %i.next, %loop ]
10  %i.next = add i32 %i, 32
11  %t = icmp ne i32 %i.next, %s
12  br i1 %t, label %loop, label %exit
13exit:
14  ret void
15
16; CHECK-LABEL: @test1
17; CHECK: Loop %loop: backedge-taken count is ((-32 + (96 * %n)) /u 32)
18; CHECK: Loop %loop: max backedge-taken count is 134217727
19}
20
21; PR19183
22define i32 @test2(i32 %n) {
23entry:
24  %s = and i32 %n, -32
25  br label %loop
26loop:
27  %i = phi i32 [ 0, %entry ], [ %i.next, %loop ]
28  %i.next = add i32 %i, 32
29  %t = icmp ne i32 %i.next, %s
30  br i1 %t, label %loop, label %exit
31exit:
32  ret i32 %i
33
34; CHECK-LABEL: @test2
35; CHECK: Loop %loop: backedge-taken count is ((-32 + (32 * (%n /u 32))<nuw>) /u 32)
36; CHECK: Loop %loop: max backedge-taken count is 134217727
37}
38
39define void @test3(i32 %n) {
40entry:
41  %s = mul i32 %n, 96
42  br label %loop
43loop:
44  %i = phi i32 [ 0, %entry ], [ %i.next, %loop ]
45  %i.next = add i32 %i, 96
46  %t = icmp ne i32 %i.next, %s
47  br i1 %t, label %loop, label %exit
48exit:
49  ret void
50
51; CHECK-LABEL: @test3
52; CHECK: Loop %loop: backedge-taken count is ((-32 + (32 * %n)) /u 32)
53; CHECK: Loop %loop: max backedge-taken count is 134217727
54}
55
56define void @test4(i32 %n) {
57entry:
58  %s = mul i32 %n, 4
59  br label %loop
60loop:
61  %i = phi i32 [ 0, %entry ], [ %i.next, %loop ]
62  %i.next = add i32 %i, 12
63  %t = icmp ne i32 %i.next, %s
64  br i1 %t, label %loop, label %exit
65exit:
66  ret void
67
68; CHECK-LABEL: @test4
69; CHECK: Loop %loop: backedge-taken count is ((-4 + (-1431655764 * %n)) /u 4)
70; CHECK: Loop %loop: max backedge-taken count is 1073741823
71}
72
73define void @test5(i32 %n) {
74entry:
75  %s = mul i32 %n, 4
76  br label %loop
77loop:
78  %i = phi i32 [ %s, %entry ], [ %i.next, %loop ]
79  %i.next = add i32 %i, -4
80  %t = icmp ne i32 %i.next, 0
81  br i1 %t, label %loop, label %exit
82exit:
83  ret void
84
85; CHECK-LABEL: @test5
86; CHECK: Loop %loop: backedge-taken count is ((-4 + (4 * %n)) /u 4)
87; CHECK: Loop %loop: max backedge-taken count is 1073741823
88}
89