int-ssub-07.ll
6.31 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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
; Test 64-bit subtraction in which the second operand is constant.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
declare i32 @foo()
; Check subtractions of 1.
define zeroext i1 @f1(i64 %dummy, i64 %a, i64 *%res) {
; CHECK-LABEL: f1:
; CHECK: aghi %r3, -1
; CHECK-DAG: stg %r3, 0(%r4)
; CHECK-DAG: ipm [[REG:%r[0-5]]]
; CHECK-DAG: afi [[REG]], 1342177280
; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
; CHECK: br %r14
%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 1)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, i64 *%res
ret i1 %obit
}
; Check the high end of the SGHI range.
define zeroext i1 @f2(i64 %dummy, i64 %a, i64 *%res) {
; CHECK-LABEL: f2:
; CHECK: aghi %r3, -32768
; CHECK-DAG: stg %r3, 0(%r4)
; CHECK-DAG: ipm [[REG:%r[0-5]]]
; CHECK-DAG: afi [[REG]], 1342177280
; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
; CHECK: br %r14
%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 32768)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, i64 *%res
ret i1 %obit
}
; Check the next value up, which must use SGFI instead.
define zeroext i1 @f3(i64 %dummy, i64 %a, i64 *%res) {
; CHECK-LABEL: f3:
; CHECK: agfi %r3, -32769
; CHECK-DAG: stg %r3, 0(%r4)
; CHECK-DAG: ipm [[REG:%r[0-5]]]
; CHECK-DAG: afi [[REG]], 1342177280
; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
; CHECK: br %r14
%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 32769)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, i64 *%res
ret i1 %obit
}
; Check the high end of the SGFI range.
define zeroext i1 @f4(i64 %dummy, i64 %a, i64 *%res) {
; CHECK-LABEL: f4:
; CHECK: agfi %r3, -2147483648
; CHECK-DAG: stg %r3, 0(%r4)
; CHECK-DAG: ipm [[REG:%r[0-5]]]
; CHECK-DAG: afi [[REG]], 1342177280
; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
; CHECK: br %r14
%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 2147483648)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, i64 *%res
ret i1 %obit
}
; Check the next value up, which must be loaded into a register first.
define zeroext i1 @f5(i64 %dummy, i64 %a, i64 *%res) {
; CHECK-LABEL: f5:
; CHECK: llilf [[REG1:%r[0-9]+]], 2147483649
; CHECK: sgr %r3, [[REG1]]
; CHECK-DAG: stg %r3, 0(%r4)
; CHECK-DAG: ipm [[REG:%r[0-5]]]
; CHECK-DAG: afi [[REG]], 1342177280
; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
; CHECK: br %r14
%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 2147483649)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, i64 *%res
ret i1 %obit
}
; Check the high end of the negative SGHI range.
define zeroext i1 @f6(i64 %dummy, i64 %a, i64 *%res) {
; CHECK-LABEL: f6:
; CHECK: aghi %r3, 1
; CHECK-DAG: stg %r3, 0(%r4)
; CHECK-DAG: ipm [[REG:%r[0-5]]]
; CHECK-DAG: afi [[REG]], 1342177280
; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
; CHECK: br %r14
%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 -1)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, i64 *%res
ret i1 %obit
}
; Check the low end of the SGHI range.
define zeroext i1 @f7(i64 %dummy, i64 %a, i64 *%res) {
; CHECK-LABEL: f7:
; CHECK: aghi %r3, 32767
; CHECK-DAG: stg %r3, 0(%r4)
; CHECK-DAG: ipm [[REG:%r[0-5]]]
; CHECK-DAG: afi [[REG]], 1342177280
; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
; CHECK: br %r14
%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 -32767)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, i64 *%res
ret i1 %obit
}
; Check the next value down, which must use SGFI instead.
define zeroext i1 @f8(i64 %dummy, i64 %a, i64 *%res) {
; CHECK-LABEL: f8:
; CHECK: agfi %r3, 32768
; CHECK-DAG: stg %r3, 0(%r4)
; CHECK-DAG: ipm [[REG:%r[0-5]]]
; CHECK-DAG: afi [[REG]], 1342177280
; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
; CHECK: br %r14
%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 -32768)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, i64 *%res
ret i1 %obit
}
; Check the low end of the SGFI range.
define zeroext i1 @f9(i64 %dummy, i64 %a, i64 *%res) {
; CHECK-LABEL: f9:
; CHECK: agfi %r3, 2147483647
; CHECK-DAG: stg %r3, 0(%r4)
; CHECK-DAG: ipm [[REG:%r[0-5]]]
; CHECK-DAG: afi [[REG]], 1342177280
; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
; CHECK: br %r14
%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 -2147483647)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, i64 *%res
ret i1 %obit
}
; Check the next value down, which must use register subtraction instead.
define zeroext i1 @f10(i64 %dummy, i64 %a, i64 *%res) {
; CHECK-LABEL: f10:
; CHECK: llilh [[REG1:%r[0-9]+]], 32768
; CHECK: agr [[REG1]], %r3
; CHECK-DAG: stg [[REG1]], 0(%r4)
; CHECK-DAG: ipm [[REG:%r[0-5]]]
; CHECK-DAG: afi [[REG]], 1342177280
; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
; CHECK: br %r14
%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 -2147483648)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, i64 *%res
ret i1 %obit
}
; Check using the overflow result for a branch.
define void @f11(i64 %dummy, i64 %a, i64 *%res) {
; CHECK-LABEL: f11:
; CHECK: aghi %r3, -1
; CHECK: stg %r3, 0(%r4)
; CHECK: {{jgo foo@PLT|bnor %r14}}
; CHECK: {{br %r14|jg foo@PLT}}
%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 1)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, i64 *%res
br i1 %obit, label %call, label %exit
call:
tail call i32 @foo()
br label %exit
exit:
ret void
}
; ... and the same with the inverted direction.
define void @f12(i64 %dummy, i64 %a, i64 *%res) {
; CHECK-LABEL: f12:
; CHECK: aghi %r3, -1
; CHECK: stg %r3, 0(%r4)
; CHECK: {{jgno foo@PLT|bor %r14}}
; CHECK: {{br %r14|jg foo@PLT}}
%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 1)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, i64 *%res
br i1 %obit, label %exit, label %call
call:
tail call i32 @foo()
br label %exit
exit:
ret void
}
declare {i64, i1} @llvm.ssub.with.overflow.i64(i64, i64) nounwind readnone