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
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -float2int -S | FileCheck %s
; RUN: opt < %s -passes='float2int' -S | FileCheck %s
;
; Positive tests
;
define i16 @simple1(i8 %a) {
; CHECK-LABEL: @simple1(
; CHECK-NEXT: [[TMP1:%.*]] = zext i8 [[A:%.*]] to i32
; CHECK-NEXT: [[T21:%.*]] = add i32 [[TMP1]], 1
; CHECK-NEXT: [[TMP2:%.*]] = trunc i32 [[T21]] to i16
; CHECK-NEXT: ret i16 [[TMP2]]
;
%t1 = uitofp i8 %a to float
%t2 = fadd float %t1, 1.0
%t3 = fptoui float %t2 to i16
ret i16 %t3
}
define i8 @simple2(i8 %a) {
; CHECK-LABEL: @simple2(
; CHECK-NEXT: [[TMP1:%.*]] = zext i8 [[A:%.*]] to i32
; CHECK-NEXT: [[T21:%.*]] = sub i32 [[TMP1]], 1
; CHECK-NEXT: [[TMP2:%.*]] = trunc i32 [[T21]] to i8
; CHECK-NEXT: ret i8 [[TMP2]]
;
%t1 = uitofp i8 %a to float
%t2 = fsub float %t1, 1.0
%t3 = fptoui float %t2 to i8
ret i8 %t3
}
define i32 @simple3(i8 %a) {
; CHECK-LABEL: @simple3(
; CHECK-NEXT: [[TMP1:%.*]] = zext i8 [[A:%.*]] to i32
; CHECK-NEXT: [[T21:%.*]] = sub i32 [[TMP1]], 1
; CHECK-NEXT: ret i32 [[T21]]
;
%t1 = uitofp i8 %a to float
%t2 = fsub float %t1, 1.0
%t3 = fptoui float %t2 to i32
ret i32 %t3
}
define i1 @cmp(i8 %a, i8 %b) {
; CHECK-LABEL: @cmp(
; CHECK-NEXT: [[TMP1:%.*]] = zext i8 [[A:%.*]] to i32
; CHECK-NEXT: [[TMP2:%.*]] = zext i8 [[B:%.*]] to i32
; CHECK-NEXT: [[T31:%.*]] = icmp slt i32 [[TMP1]], [[TMP2]]
; CHECK-NEXT: ret i1 [[T31]]
;
%t1 = uitofp i8 %a to float
%t2 = uitofp i8 %b to float
%t3 = fcmp ult float %t1, %t2
ret i1 %t3
}
define i32 @simple4(i32 %a) {
; CHECK-LABEL: @simple4(
; CHECK-NEXT: [[TMP1:%.*]] = zext i32 [[A:%.*]] to i64
; CHECK-NEXT: [[T21:%.*]] = add i64 [[TMP1]], 1
; CHECK-NEXT: [[TMP2:%.*]] = trunc i64 [[T21]] to i32
; CHECK-NEXT: ret i32 [[TMP2]]
;
%t1 = uitofp i32 %a to double
%t2 = fadd double %t1, 1.0
%t3 = fptoui double %t2 to i32
ret i32 %t3
}
define i32 @simple5(i8 %a, i8 %b) {
; CHECK-LABEL: @simple5(
; CHECK-NEXT: [[TMP1:%.*]] = zext i8 [[A:%.*]] to i32
; CHECK-NEXT: [[TMP2:%.*]] = zext i8 [[B:%.*]] to i32
; CHECK-NEXT: [[T31:%.*]] = add i32 [[TMP1]], 1
; CHECK-NEXT: [[T42:%.*]] = mul i32 [[T31]], [[TMP2]]
; CHECK-NEXT: ret i32 [[T42]]
;
%t1 = uitofp i8 %a to float
%t2 = uitofp i8 %b to float
%t3 = fadd float %t1, 1.0
%t4 = fmul float %t3, %t2
%t5 = fptoui float %t4 to i32
ret i32 %t5
}
define i32 @simple6(i8 %a, i8 %b) {
; CHECK-LABEL: @simple6(
; CHECK-NEXT: [[TMP1:%.*]] = zext i8 [[A:%.*]] to i32
; CHECK-NEXT: [[TMP2:%.*]] = zext i8 [[B:%.*]] to i32
; CHECK-NEXT: [[T31:%.*]] = sub i32 0, [[TMP1]]
; CHECK-NEXT: [[T42:%.*]] = mul i32 [[T31]], [[TMP2]]
; CHECK-NEXT: ret i32 [[T42]]
;
%t1 = uitofp i8 %a to float
%t2 = uitofp i8 %b to float
%t3 = fneg float %t1
%t4 = fmul float %t3, %t2
%t5 = fptoui float %t4 to i32
ret i32 %t5
}
; The two chains don't interact - failure of one shouldn't
; cause failure of the other.
define i32 @multi1(i8 %a, i8 %b, i8 %c, float %d) {
; CHECK-LABEL: @multi1(
; CHECK-NEXT: [[TMP1:%.*]] = zext i8 [[A:%.*]] to i32
; CHECK-NEXT: [[TMP2:%.*]] = zext i8 [[B:%.*]] to i32
; CHECK-NEXT: [[FC:%.*]] = uitofp i8 [[C:%.*]] to float
; CHECK-NEXT: [[X1:%.*]] = add i32 [[TMP1]], [[TMP2]]
; CHECK-NEXT: [[Z:%.*]] = fadd float [[FC]], [[D:%.*]]
; CHECK-NEXT: [[W:%.*]] = fptoui float [[Z]] to i32
; CHECK-NEXT: [[R:%.*]] = add i32 [[X1]], [[W]]
; CHECK-NEXT: ret i32 [[R]]
;
%fa = uitofp i8 %a to float
%fb = uitofp i8 %b to float
%fc = uitofp i8 %c to float
%x = fadd float %fa, %fb
%y = fptoui float %x to i32
%z = fadd float %fc, %d
%w = fptoui float %z to i32
%r = add i32 %y, %w
ret i32 %r
}
define i16 @simple_negzero(i8 %a) {
; CHECK-LABEL: @simple_negzero(
; CHECK-NEXT: [[TMP1:%.*]] = zext i8 [[A:%.*]] to i32
; CHECK-NEXT: [[T21:%.*]] = add i32 [[TMP1]], 0
; CHECK-NEXT: [[TMP2:%.*]] = trunc i32 [[T21]] to i16
; CHECK-NEXT: ret i16 [[TMP2]]
;
%t1 = uitofp i8 %a to float
%t2 = fadd fast float %t1, -0.0
%t3 = fptoui float %t2 to i16
ret i16 %t3
}
define i32 @simple_negative(i8 %call) {
; CHECK-LABEL: @simple_negative(
; CHECK-NEXT: [[TMP1:%.*]] = sext i8 [[CALL:%.*]] to i32
; CHECK-NEXT: [[MUL1:%.*]] = mul i32 [[TMP1]], -3
; CHECK-NEXT: [[TMP2:%.*]] = trunc i32 [[MUL1]] to i8
; CHECK-NEXT: [[CONV3:%.*]] = sext i8 [[TMP2]] to i32
; CHECK-NEXT: ret i32 [[CONV3]]
;
%conv1 = sitofp i8 %call to float
%mul = fmul float %conv1, -3.000000e+00
%conv2 = fptosi float %mul to i8
%conv3 = sext i8 %conv2 to i32
ret i32 %conv3
}
define i16 @simple_fneg(i8 %a) {
; CHECK-LABEL: @simple_fneg(
; CHECK-NEXT: [[TMP1:%.*]] = zext i8 [[A:%.*]] to i32
; CHECK-NEXT: [[T21:%.*]] = sub i32 0, [[TMP1]]
; CHECK-NEXT: [[TMP2:%.*]] = trunc i32 [[T21]] to i16
; CHECK-NEXT: ret i16 [[TMP2]]
;
%t1 = uitofp i8 %a to float
%t2 = fneg fast float %t1
%t3 = fptoui float %t2 to i16
ret i16 %t3
}
;
; Negative tests
;
; The two chains intersect, which means because one fails, no
; transform can occur.
define i32 @neg_multi1(i8 %a, i8 %b, i8 %c, float %d) {
; CHECK-LABEL: @neg_multi1(
; CHECK-NEXT: [[FA:%.*]] = uitofp i8 [[A:%.*]] to float
; CHECK-NEXT: [[FC:%.*]] = uitofp i8 [[C:%.*]] to float
; CHECK-NEXT: [[X:%.*]] = fadd float [[FA]], [[FC]]
; CHECK-NEXT: [[Y:%.*]] = fptoui float [[X]] to i32
; CHECK-NEXT: [[Z:%.*]] = fadd float [[FC]], [[D:%.*]]
; CHECK-NEXT: [[W:%.*]] = fptoui float [[Z]] to i32
; CHECK-NEXT: [[R:%.*]] = add i32 [[Y]], [[W]]
; CHECK-NEXT: ret i32 [[R]]
;
%fa = uitofp i8 %a to float
%fc = uitofp i8 %c to float
%x = fadd float %fa, %fc
%y = fptoui float %x to i32
%z = fadd float %fc, %d
%w = fptoui float %z to i32
%r = add i32 %y, %w
ret i32 %r
}
; The i32 * i32 = i64, which has 64 bits, which is greater than the 52 bits
; that can be exactly represented in a double.
define i64 @neg_muld(i32 %a, i32 %b) {
; CHECK-LABEL: @neg_muld(
; CHECK-NEXT: [[FA:%.*]] = uitofp i32 [[A:%.*]] to double
; CHECK-NEXT: [[FB:%.*]] = uitofp i32 [[B:%.*]] to double
; CHECK-NEXT: [[MUL:%.*]] = fmul double [[FA]], [[FB]]
; CHECK-NEXT: [[R:%.*]] = fptoui double [[MUL]] to i64
; CHECK-NEXT: ret i64 [[R]]
;
%fa = uitofp i32 %a to double
%fb = uitofp i32 %b to double
%mul = fmul double %fa, %fb
%r = fptoui double %mul to i64
ret i64 %r
}
; The i16 * i16 = i32, which can't be represented in a float, but can in a
; double. This should fail, as the written code uses floats, not doubles so
; the original result may be inaccurate.
define i32 @neg_mulf(i16 %a, i16 %b) {
; CHECK-LABEL: @neg_mulf(
; CHECK-NEXT: [[FA:%.*]] = uitofp i16 [[A:%.*]] to float
; CHECK-NEXT: [[FB:%.*]] = uitofp i16 [[B:%.*]] to float
; CHECK-NEXT: [[MUL:%.*]] = fmul float [[FA]], [[FB]]
; CHECK-NEXT: [[R:%.*]] = fptoui float [[MUL]] to i32
; CHECK-NEXT: ret i32 [[R]]
;
%fa = uitofp i16 %a to float
%fb = uitofp i16 %b to float
%mul = fmul float %fa, %fb
%r = fptoui float %mul to i32
ret i32 %r
}
; "false" doesn't have an icmp equivalent.
define i1 @neg_cmp(i8 %a, i8 %b) {
; CHECK-LABEL: @neg_cmp(
; CHECK-NEXT: [[T1:%.*]] = uitofp i8 [[A:%.*]] to float
; CHECK-NEXT: [[T2:%.*]] = uitofp i8 [[B:%.*]] to float
; CHECK-NEXT: [[T3:%.*]] = fcmp false float [[T1]], [[T2]]
; CHECK-NEXT: ret i1 [[T3]]
;
%t1 = uitofp i8 %a to float
%t2 = uitofp i8 %b to float
%t3 = fcmp false float %t1, %t2
ret i1 %t3
}
; Division isn't a supported operator.
define i16 @neg_div(i8 %a) {
; CHECK-LABEL: @neg_div(
; CHECK-NEXT: [[T1:%.*]] = uitofp i8 [[A:%.*]] to float
; CHECK-NEXT: [[T2:%.*]] = fdiv float [[T1]], 1.000000e+00
; CHECK-NEXT: [[T3:%.*]] = fptoui float [[T2]] to i16
; CHECK-NEXT: ret i16 [[T3]]
;
%t1 = uitofp i8 %a to float
%t2 = fdiv float %t1, 1.0
%t3 = fptoui float %t2 to i16
ret i16 %t3
}
; 1.2 is not an integer.
define i16 @neg_remainder(i8 %a) {
; CHECK-LABEL: @neg_remainder(
; CHECK-NEXT: [[T1:%.*]] = uitofp i8 [[A:%.*]] to float
; CHECK-NEXT: [[T2:%.*]] = fadd float [[T1]], 1.250000e+00
; CHECK-NEXT: [[T3:%.*]] = fptoui float [[T2]] to i16
; CHECK-NEXT: ret i16 [[T3]]
;
%t1 = uitofp i8 %a to float
%t2 = fadd float %t1, 1.25
%t3 = fptoui float %t2 to i16
ret i16 %t3
}
; i80 > i64, which is the largest bitwidth handleable by default.
define i80 @neg_toolarge(i80 %a) {
; CHECK-LABEL: @neg_toolarge(
; CHECK-NEXT: [[T1:%.*]] = uitofp i80 [[A:%.*]] to fp128
; CHECK-NEXT: [[T2:%.*]] = fadd fp128 [[T1]], [[T1]]
; CHECK-NEXT: [[T3:%.*]] = fptoui fp128 [[T2]] to i80
; CHECK-NEXT: ret i80 [[T3]]
;
%t1 = uitofp i80 %a to fp128
%t2 = fadd fp128 %t1, %t1
%t3 = fptoui fp128 %t2 to i80
ret i80 %t3
}
; The sequence %t1..%t3 cannot be converted because %t4 uses %t2.
define i32 @neg_calluser(i32 %value) {
; CHECK-LABEL: @neg_calluser(
; CHECK-NEXT: [[T1:%.*]] = sitofp i32 [[VALUE:%.*]] to double
; CHECK-NEXT: [[T2:%.*]] = fadd double [[T1]], 1.000000e+00
; CHECK-NEXT: [[T3:%.*]] = fcmp olt double [[T2]], 0.000000e+00
; CHECK-NEXT: [[T4:%.*]] = tail call double @g(double [[T2]])
; CHECK-NEXT: [[T5:%.*]] = fptosi double [[T4]] to i32
; CHECK-NEXT: [[T6:%.*]] = zext i1 [[T3]] to i32
; CHECK-NEXT: [[T7:%.*]] = add i32 [[T6]], [[T5]]
; CHECK-NEXT: ret i32 [[T7]]
;
%t1 = sitofp i32 %value to double
%t2 = fadd double %t1, 1.0
%t3 = fcmp olt double %t2, 0.000000e+00
%t4 = tail call double @g(double %t2)
%t5 = fptosi double %t4 to i32
%t6 = zext i1 %t3 to i32
%t7 = add i32 %t6, %t5
ret i32 %t7
}
declare double @g(double)
define <4 x i16> @neg_vector(<4 x i8> %a) {
; CHECK-LABEL: @neg_vector(
; CHECK-NEXT: [[T1:%.*]] = uitofp <4 x i8> [[A:%.*]] to <4 x float>
; CHECK-NEXT: [[T2:%.*]] = fptoui <4 x float> [[T1]] to <4 x i16>
; CHECK-NEXT: ret <4 x i16> [[T2]]
;
%t1 = uitofp <4 x i8> %a to <4 x float>
%t2 = fptoui <4 x float> %t1 to <4 x i16>
ret <4 x i16> %t2
}
; Don't crash while processing unreachable (non-standard) IR.
define void @PR38502() {
; CHECK-LABEL: @PR38502(
; CHECK-NEXT: entry:
; CHECK-NEXT: ret void
; CHECK: bogusBB:
; CHECK-NEXT: [[INC1:%.*]] = fadd double [[INC:%.*]], 1.000000e+00
; CHECK-NEXT: [[INC]] = fadd double [[INC1]], 1.000000e+00
; CHECK-NEXT: [[TOBOOL:%.*]] = fcmp une double [[INC]], 0.000000e+00
; CHECK-NEXT: br label [[BOGUSBB:%.*]]
;
entry:
ret void
bogusBB: ; preds = %bogusBB
%inc1 = fadd double %inc, 1.000000e+00
%inc = fadd double %inc1, 1.000000e+00
%tobool = fcmp une double %inc, 0.000000e+00
br label %bogusBB
}
|