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
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
| ; RUN: llc -O3 < %s | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n32:64"
target triple = "arm64-unknown-unknown"
; CHECK-LABEL: foo1
; CHECK: cinc w{{[0-9]+}}, w{{[0-9]+}}, ne
define i32 @foo1(i32 %b, i32 %c) nounwind readnone ssp {
entry:
%not.tobool = icmp ne i32 %c, 0
%add = zext i1 %not.tobool to i32
%b.add = add i32 %c, %b
%add1 = add i32 %b.add, %add
ret i32 %add1
}
; CHECK-LABEL: foo2
; CHECK: cneg w{{[0-9]+}}, w{{[0-9]+}}, ne
define i32 @foo2(i32 %b, i32 %c) nounwind readnone ssp {
entry:
%mul = sub i32 0, %b
%tobool = icmp eq i32 %c, 0
%b.mul = select i1 %tobool, i32 %b, i32 %mul
%add = add nsw i32 %b.mul, %c
ret i32 %add
}
; CHECK-LABEL: foo3
; CHECK: cinv w{{[0-9]+}}, w{{[0-9]+}}, ne
define i32 @foo3(i32 %b, i32 %c) nounwind readnone ssp {
entry:
%not.tobool = icmp ne i32 %c, 0
%xor = sext i1 %not.tobool to i32
%b.xor = xor i32 %xor, %b
%add = add nsw i32 %b.xor, %c
ret i32 %add
}
; rdar://11632325
define i32@foo4(i32 %a) nounwind ssp {
; CHECK-LABEL: foo4
; CHECK: cneg
; CHECK-NEXT: ret
%cmp = icmp sgt i32 %a, -1
%neg = sub nsw i32 0, %a
%cond = select i1 %cmp, i32 %a, i32 %neg
ret i32 %cond
}
define i32@foo5(i32 %a, i32 %b) nounwind ssp {
entry:
; CHECK-LABEL: foo5
; CHECK: subs
; CHECK-NEXT: cneg
; CHECK-NEXT: ret
%sub = sub nsw i32 %a, %b
%cmp = icmp sgt i32 %sub, -1
%sub3 = sub nsw i32 0, %sub
%cond = select i1 %cmp, i32 %sub, i32 %sub3
ret i32 %cond
}
; make sure we can handle branch instruction in optimizeCompare.
define i32@foo6(i32 %a, i32 %b) nounwind ssp {
; CHECK-LABEL: foo6
; CHECK: b
%sub = sub nsw i32 %a, %b
%cmp = icmp sgt i32 %sub, 0
br i1 %cmp, label %l.if, label %l.else
l.if:
ret i32 1
l.else:
ret i32 %sub
}
; If CPSR is used multiple times and V flag is used, we don't remove cmp.
define i32 @foo7(i32 %a, i32 %b) nounwind {
entry:
; CHECK-LABEL: foo7:
; CHECK: sub
; FIXME: Misspelled CHECK-NEXT
; CHECK-next: adds
; CHECK-next: csneg
; CHECK-next: b
%sub = sub nsw i32 %a, %b
%cmp = icmp sgt i32 %sub, -1
%sub3 = sub nsw i32 0, %sub
%cond = select i1 %cmp, i32 %sub, i32 %sub3
br i1 %cmp, label %if.then, label %if.else
if.then:
%cmp2 = icmp slt i32 %sub, -1
%sel = select i1 %cmp2, i32 %cond, i32 %a
ret i32 %sel
if.else:
ret i32 %cond
}
define i32 @foo8(i32 %v, i32 %a, i32 %b) nounwind readnone ssp {
entry:
; CHECK-LABEL: foo8:
; CHECK: cmp w0, #0
; CHECK: csinv w0, w1, w2, ne
%tobool = icmp eq i32 %v, 0
%neg = xor i32 -1, %b
%cond = select i1 %tobool, i32 %neg, i32 %a
ret i32 %cond
}
define i32 @foo9(i32 %v) nounwind readnone optsize ssp {
entry:
; CHECK-LABEL: foo9:
; CHECK: cmp w0, #0
; CHECK: mov w[[REG:[0-9]+]], #4
; CHECK: cinv w0, w[[REG]], eq
%tobool = icmp ne i32 %v, 0
%cond = select i1 %tobool, i32 4, i32 -5
ret i32 %cond
}
define i64 @foo10(i64 %v) nounwind readnone optsize ssp {
entry:
; CHECK-LABEL: foo10:
; CHECK: cmp x0, #0
; CHECK: mov w[[REG:[0-9]+]], #4
; CHECK: cinv x0, x[[REG]], eq
%tobool = icmp ne i64 %v, 0
%cond = select i1 %tobool, i64 4, i64 -5
ret i64 %cond
}
define i32 @foo11(i32 %v) nounwind readnone optsize ssp {
entry:
; CHECK-LABEL: foo11:
; CHECK: cmp w0, #0
; CHECK: mov w[[REG:[0-9]+]], #4
; CHECK: cneg w0, w[[REG]], eq
%tobool = icmp ne i32 %v, 0
%cond = select i1 %tobool, i32 4, i32 -4
ret i32 %cond
}
define i64 @foo12(i64 %v) nounwind readnone optsize ssp {
entry:
; CHECK-LABEL: foo12:
; CHECK: cmp x0, #0
; CHECK: mov w[[REG:[0-9]+]], #4
; CHECK: cneg x0, x[[REG]], eq
%tobool = icmp ne i64 %v, 0
%cond = select i1 %tobool, i64 4, i64 -4
ret i64 %cond
}
define i32 @foo13(i32 %v, i32 %a, i32 %b) nounwind readnone optsize ssp {
entry:
; CHECK-LABEL: foo13:
; CHECK: cmp w0, #0
; CHECK: csneg w0, w1, w2, ne
%tobool = icmp eq i32 %v, 0
%sub = sub i32 0, %b
%cond = select i1 %tobool, i32 %sub, i32 %a
ret i32 %cond
}
define i64 @foo14(i64 %v, i64 %a, i64 %b) nounwind readnone optsize ssp {
entry:
; CHECK-LABEL: foo14:
; CHECK: cmp x0, #0
; CHECK: csneg x0, x1, x2, ne
%tobool = icmp eq i64 %v, 0
%sub = sub i64 0, %b
%cond = select i1 %tobool, i64 %sub, i64 %a
ret i64 %cond
}
define i32 @foo15(i32 %a, i32 %b) nounwind readnone optsize ssp {
entry:
; CHECK-LABEL: foo15:
; CHECK: cmp w0, w1
; CHECK: mov w[[REG:[0-9]+]], #1
; CHECK: cinc w0, w[[REG]], gt
%cmp = icmp sgt i32 %a, %b
%. = select i1 %cmp, i32 2, i32 1
ret i32 %.
}
define i32 @foo16(i32 %a, i32 %b) nounwind readnone optsize ssp {
entry:
; CHECK-LABEL: foo16:
; CHECK: cmp w0, w1
; CHECK: mov w[[REG:[0-9]+]], #1
; CHECK: cinc w0, w[[REG]], le
%cmp = icmp sgt i32 %a, %b
%. = select i1 %cmp, i32 1, i32 2
ret i32 %.
}
define i64 @foo17(i64 %a, i64 %b) nounwind readnone optsize ssp {
entry:
; CHECK-LABEL: foo17:
; CHECK: cmp x0, x1
; CHECK: mov w[[REG:[0-9]+]], #1
; CHECK: cinc x0, x[[REG]], gt
%cmp = icmp sgt i64 %a, %b
%. = select i1 %cmp, i64 2, i64 1
ret i64 %.
}
define i64 @foo18(i64 %a, i64 %b) nounwind readnone optsize ssp {
entry:
; CHECK-LABEL: foo18:
; CHECK: cmp x0, x1
; CHECK: mov w[[REG:[0-9]+]], #1
; CHECK: cinc x0, x[[REG]], le
%cmp = icmp sgt i64 %a, %b
%. = select i1 %cmp, i64 1, i64 2
ret i64 %.
}
define i64 @foo19(i64 %a, i64 %b, i64 %c) {
entry:
; CHECK-LABEL: foo19:
; CHECK: cinc x0, x2
; CHECK-NOT: add
%cmp = icmp ult i64 %a, %b
%inc = zext i1 %cmp to i64
%inc.c = add i64 %inc, %c
ret i64 %inc.c
}
define i32 @foo20(i32 %x) {
; CHECK-LABEL: foo20:
; CHECK: cmp w0, #5
; CHECK: mov w[[REG:[0-9]+]], #6
; CHECK: csinc w0, w[[REG]], wzr, eq
%cmp = icmp eq i32 %x, 5
%res = select i1 %cmp, i32 6, i32 1
ret i32 %res
}
define i64 @foo21(i64 %x) {
; CHECK-LABEL: foo21:
; CHECK: cmp x0, #5
; CHECK: mov w[[REG:[0-9]+]], #6
; CHECK: csinc x0, x[[REG]], xzr, eq
%cmp = icmp eq i64 %x, 5
%res = select i1 %cmp, i64 6, i64 1
ret i64 %res
}
define i32 @foo22(i32 %x) {
; CHECK-LABEL: foo22:
; CHECK: cmp w0, #5
; CHECK: mov w[[REG:[0-9]+]], #6
; CHECK: csinc w0, w[[REG]], wzr, ne
%cmp = icmp eq i32 %x, 5
%res = select i1 %cmp, i32 1, i32 6
ret i32 %res
}
define i64 @foo23(i64 %x) {
; CHECK-LABEL: foo23:
; CHECK: cmp x0, #5
; CHECK: mov w[[REG:[0-9]+]], #6
; CHECK: csinc x0, x[[REG]], xzr, ne
%cmp = icmp eq i64 %x, 5
%res = select i1 %cmp, i64 1, i64 6
ret i64 %res
}
|