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
215
216
217
218
219
220
221
222
223
224
225
| ; Test 32-bit ordered comparisons that are really between a memory halfword
; and a constant.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
; Check unsigned comparison near the low end of the CLHHSI range, using zero
; extension.
define double @f1(double %a, double %b, i16 *%ptr) {
; CHECK-LABEL: f1:
; CHECK: clhhsi 0(%r2), 1
; CHECK-NEXT: bhr %r14
; CHECK: br %r14
%val = load i16, i16 *%ptr
%ext = zext i16 %val to i32
%cond = icmp ugt i32 %ext, 1
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check unsigned comparison near the low end of the CLHHSI range, using sign
; extension.
define double @f2(double %a, double %b, i16 *%ptr) {
; CHECK-LABEL: f2:
; CHECK: clhhsi 0(%r2), 1
; CHECK-NEXT: bhr %r14
; CHECK: br %r14
%val = load i16, i16 *%ptr
%ext = sext i16 %val to i32
%cond = icmp ugt i32 %ext, 1
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check unsigned comparison near the high end of the CLHHSI range, using zero
; extension.
define double @f3(double %a, double %b, i16 *%ptr) {
; CHECK-LABEL: f3:
; CHECK: clhhsi 0(%r2), 65534
; CHECK-NEXT: blr %r14
; CHECK: br %r14
%val = load i16, i16 *%ptr
%ext = zext i16 %val to i32
%cond = icmp ult i32 %ext, 65534
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check unsigned comparison near the high end of the CLHHSI range, using sign
; extension.
define double @f4(double %a, double %b, i16 *%ptr) {
; CHECK-LABEL: f4:
; CHECK: clhhsi 0(%r2), 65534
; CHECK-NEXT: blr %r14
; CHECK: br %r14
%val = load i16, i16 *%ptr
%ext = sext i16 %val to i32
%cond = icmp ult i32 %ext, -2
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check unsigned comparison above the high end of the CLHHSI range, using zero
; extension. The condition is always true.
define double @f5(double %a, double %b, i16 *%ptr) {
; CHECK-LABEL: f5:
; CHECK-NOT: clhhsi
; CHECK: br %r14
%val = load i16, i16 *%ptr
%ext = zext i16 %val to i32
%cond = icmp ult i32 %ext, 65536
%res = select i1 %cond, double %a, double %b
ret double %res
}
; When using unsigned comparison with sign extension, equality with values
; in the range [32768, MAX-32769] is impossible, and ordered comparisons with
; those values are effectively sign tests. Since such comparisons are
; unlikely to occur in practice, we don't bother optimizing the second case,
; and simply ignore CLHHSI for this range. First check the low end of the
; range.
define double @f6(double %a, double %b, i16 *%ptr) {
; CHECK-LABEL: f6:
; CHECK-NOT: clhhsi
; CHECK: br %r14
%val = load i16, i16 *%ptr
%ext = sext i16 %val to i32
%cond = icmp ult i32 %ext, 32768
%res = select i1 %cond, double %a, double %b
ret double %res
}
; ...and then the high end.
define double @f7(double %a, double %b, i16 *%ptr) {
; CHECK-LABEL: f7:
; CHECK-NOT: clhhsi
; CHECK: br %r14
%val = load i16, i16 *%ptr
%ext = sext i16 %val to i32
%cond = icmp ult i32 %ext, -32769
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check signed comparison near the low end of the CLHHSI range, using zero
; extension. This is equivalent to unsigned comparison.
define double @f8(double %a, double %b, i16 *%ptr) {
; CHECK-LABEL: f8:
; CHECK: clhhsi 0(%r2), 1
; CHECK-NEXT: bhr %r14
; CHECK: br %r14
%val = load i16, i16 *%ptr
%ext = zext i16 %val to i32
%cond = icmp sgt i32 %ext, 1
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check signed comparison near the low end of the CLHHSI range, using sign
; extension. This should use CHHSI instead.
define double @f9(double %a, double %b, i16 *%ptr) {
; CHECK-LABEL: f9:
; CHECK: chhsi 0(%r2), 1
; CHECK-NEXT: bhr %r14
; CHECK: br %r14
%val = load i16, i16 *%ptr
%ext = sext i16 %val to i32
%cond = icmp sgt i32 %ext, 1
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check signed comparison near the high end of the CLHHSI range, using zero
; extension. This is equivalent to unsigned comparison.
define double @f10(double %a, double %b, i16 *%ptr) {
; CHECK-LABEL: f10:
; CHECK: clhhsi 0(%r2), 65534
; CHECK-NEXT: blr %r14
; CHECK: br %r14
%val = load i16, i16 *%ptr
%ext = zext i16 %val to i32
%cond = icmp slt i32 %ext, 65534
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check signed comparison near the high end of the CLHHSI range, using sign
; extension. This should use CHHSI instead.
define double @f11(double %a, double %b, i16 *%ptr) {
; CHECK-LABEL: f11:
; CHECK: chhsi 0(%r2), -2
; CHECK-NEXT: blr %r14
; CHECK: br %r14
%val = load i16, i16 *%ptr
%ext = sext i16 %val to i32
%cond = icmp slt i32 %ext, -2
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check signed comparison above the high end of the CLHHSI range, using zero
; extension. The condition is always true.
define double @f12(double %a, double %b, i16 *%ptr) {
; CHECK-LABEL: f12:
; CHECK-NOT: cli
; CHECK: br %r14
%val = load i16, i16 *%ptr
%ext = zext i16 %val to i32
%cond = icmp slt i32 %ext, 65536
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check signed comparison near the high end of the CHHSI range, using sign
; extension.
define double @f13(double %a, double %b, i16 *%ptr) {
; CHECK-LABEL: f13:
; CHECK: chhsi 0(%r2), 32766
; CHECK-NEXT: blr %r14
; CHECK: br %r14
%val = load i16, i16 *%ptr
%ext = sext i16 %val to i32
%cond = icmp slt i32 %ext, 32766
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check signed comparison above the high end of the CHHSI range, using sign
; extension. This condition is always true.
define double @f14(double %a, double %b, i16 *%ptr) {
; CHECK-LABEL: f14:
; CHECK-NOT: chhsi
; CHECK: br %r14
%val = load i16, i16 *%ptr
%ext = sext i16 %val to i32
%cond = icmp slt i32 %ext, 32768
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check signed comparison near the low end of the CHHSI range, using sign
; extension.
define double @f15(double %a, double %b, i16 *%ptr) {
; CHECK-LABEL: f15:
; CHECK: chhsi 0(%r2), -32767
; CHECK-NEXT: bhr %r14
; CHECK: br %r14
%val = load i16, i16 *%ptr
%ext = sext i16 %val to i32
%cond = icmp sgt i32 %ext, -32767
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check signed comparison below the low end of the CHHSI range, using sign
; extension. This condition is always true.
define double @f16(double %a, double %b, i16 *%ptr) {
; CHECK-LABEL: f16:
; CHECK-NOT: chhsi
; CHECK: br %r14
%val = load i16, i16 *%ptr
%ext = sext i16 %val to i32
%cond = icmp sgt i32 %ext, -32769
%res = select i1 %cond, double %a, double %b
ret double %res
}
|