1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
| ; RUN: opt < %s -correlated-propagation -S | FileCheck %s
; Check that debug locations are preserved. For more info see:
; https://llvm.org/docs/SourceLevelDebugging.html#fixing-errors
; RUN: opt < %s -enable-debugify -correlated-propagation -S 2>&1 | \
; RUN: FileCheck %s -check-prefix=DEBUG
; DEBUG: CheckModuleDebugify: PASS
; CHECK-LABEL: @test_nop
define void @test_nop(i32 %n) {
; CHECK udiv i32 %n, 100
%div = udiv i32 %n, 100
ret void
}
; CHECK-LABEL: @test1(
define void @test1(i32 %n) {
entry:
%cmp = icmp ule i32 %n, 65535
br i1 %cmp, label %bb, label %exit
bb:
; CHECK: udiv i16
%div = udiv i32 %n, 100
br label %exit
exit:
ret void
}
; CHECK-LABEL: @test2(
define void @test2(i32 %n) {
entry:
%cmp = icmp ule i32 %n, 65536
br i1 %cmp, label %bb, label %exit
bb:
; CHECK: udiv i32 %n, 100
%div = udiv i32 %n, 100
br label %exit
exit:
ret void
}
; CHECK-LABEL: @test3(
define void @test3(i32 %m, i32 %n) {
entry:
%cmp1 = icmp ult i32 %m, 65535
%cmp2 = icmp ult i32 %n, 65535
%cmp = and i1 %cmp1, %cmp2
br i1 %cmp, label %bb, label %exit
bb:
; CHECK: udiv i16
%div = udiv i32 %m, %n
br label %exit
exit:
ret void
}
; CHECK-LABEL: @test4(
define void @test4(i32 %m, i32 %n) {
entry:
%cmp1 = icmp ult i32 %m, 65535
%cmp2 = icmp ule i32 %n, 65536
%cmp = and i1 %cmp1, %cmp2
br i1 %cmp, label %bb, label %exit
bb:
; CHECK: udiv i32 %m, %n
%div = udiv i32 %m, %n
br label %exit
exit:
ret void
}
; CHECK-LABEL: @test5
define void @test5(i32 %n) {
%trunc = and i32 %n, 65535
; CHECK: udiv i16
%div = udiv i32 %trunc, 42
ret void
}
; CHECK-LABEL: @test6
define void @test6(i32 %n) {
entry:
%cmp = icmp ule i32 %n, 255
br i1 %cmp, label %bb, label %exit
bb:
; CHECK: udiv i8
%div = sdiv i32 %n, 100
br label %exit
exit:
ret void
}
|