int-mul-05.ll
3.39 KB
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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
; Test 32-bit multiplication in which the second operand is constant.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
; Check multiplication by 2, which should use shifts.
define i32 @f1(i32 %a, i32 *%dest) {
; CHECK-LABEL: f1:
; CHECK: sll %r2, 1
; CHECK: br %r14
%mul = mul i32 %a, 2
ret i32 %mul
}
; Check multiplication by 3.
define i32 @f2(i32 %a, i32 *%dest) {
; CHECK-LABEL: f2:
; CHECK: mhi %r2, 3
; CHECK: br %r14
%mul = mul i32 %a, 3
ret i32 %mul
}
; Check the high end of the MHI range.
define i32 @f3(i32 %a, i32 *%dest) {
; CHECK-LABEL: f3:
; CHECK: mhi %r2, 32767
; CHECK: br %r14
%mul = mul i32 %a, 32767
ret i32 %mul
}
; Check the next value up, which should use shifts.
define i32 @f4(i32 %a, i32 *%dest) {
; CHECK-LABEL: f4:
; CHECK: sll %r2, 15
; CHECK: br %r14
%mul = mul i32 %a, 32768
ret i32 %mul
}
; Check the next value up again, which can use MSFI.
define i32 @f5(i32 %a, i32 *%dest) {
; CHECK-LABEL: f5:
; CHECK: msfi %r2, 32769
; CHECK: br %r14
%mul = mul i32 %a, 32769
ret i32 %mul
}
; Check the high end of the MSFI range.
define i32 @f6(i32 %a, i32 *%dest) {
; CHECK-LABEL: f6:
; CHECK: msfi %r2, 2147483647
; CHECK: br %r14
%mul = mul i32 %a, 2147483647
ret i32 %mul
}
; Check the next value up, which should use shifts.
define i32 @f7(i32 %a, i32 *%dest) {
; CHECK-LABEL: f7:
; CHECK: sll %r2, 31
; CHECK: br %r14
%mul = mul i32 %a, 2147483648
ret i32 %mul
}
; Check the next value up again, which is treated as a negative value.
define i32 @f8(i32 %a, i32 *%dest) {
; CHECK-LABEL: f8:
; CHECK: msfi %r2, -2147483647
; CHECK: br %r14
%mul = mul i32 %a, 2147483649
ret i32 %mul
}
; Check multiplication by -1, which is a negation.
define i32 @f9(i32 %a, i32 *%dest) {
; CHECK-LABEL: f9:
; CHECK: lcr %r2, %r2
; CHECK: br %r14
%mul = mul i32 %a, -1
ret i32 %mul
}
; Check multiplication by -2, which should use shifts.
define i32 @f10(i32 %a, i32 *%dest) {
; CHECK-LABEL: f10:
; CHECK: sll %r2, 1
; CHECK: lcr %r2, %r2
; CHECK: br %r14
%mul = mul i32 %a, -2
ret i32 %mul
}
; Check multiplication by -3.
define i32 @f11(i32 %a, i32 *%dest) {
; CHECK-LABEL: f11:
; CHECK: mhi %r2, -3
; CHECK: br %r14
%mul = mul i32 %a, -3
ret i32 %mul
}
; Check the lowest useful MHI value.
define i32 @f12(i32 %a, i32 *%dest) {
; CHECK-LABEL: f12:
; CHECK: mhi %r2, -32767
; CHECK: br %r14
%mul = mul i32 %a, -32767
ret i32 %mul
}
; Check the next value down, which should use shifts.
define i32 @f13(i32 %a, i32 *%dest) {
; CHECK-LABEL: f13:
; CHECK: sll %r2, 15
; CHECK: lcr %r2, %r2
; CHECK: br %r14
%mul = mul i32 %a, -32768
ret i32 %mul
}
; Check the next value down again, which can use MSFI.
define i32 @f14(i32 %a, i32 *%dest) {
; CHECK-LABEL: f14:
; CHECK: msfi %r2, -32769
; CHECK: br %r14
%mul = mul i32 %a, -32769
ret i32 %mul
}
; Check the lowest useful MSFI value.
define i32 @f15(i32 %a, i32 *%dest) {
; CHECK-LABEL: f15:
; CHECK: msfi %r2, -2147483647
; CHECK: br %r14
%mul = mul i32 %a, -2147483647
ret i32 %mul
}
; Check the next value down, which should use shifts.
define i32 @f16(i32 %a, i32 *%dest) {
; CHECK-LABEL: f16:
; CHECK: sll %r2, 31
; CHECK-NOT: lcr
; CHECK: br %r14
%mul = mul i32 %a, -2147483648
ret i32 %mul
}
; Check the next value down again, which is treated as a positive value.
define i32 @f17(i32 %a, i32 *%dest) {
; CHECK-LABEL: f17:
; CHECK: msfi %r2, 2147483647
; CHECK: br %r14
%mul = mul i32 %a, -2147483649
ret i32 %mul
}