iv-widen-elim-ext.ll
22.5 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
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
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -indvars -S | FileCheck %s
target datalayout = "e-m:e-i64:64-p:64:64:64-n8:16:32:64-S128"
; When widening IV and its users, trunc and zext/sext are not needed
; if the original 32-bit user is known to be non-negative, whether
; the IV is considered signed or unsigned.
define void @foo(i32* %A, i32* %B, i32* %C, i32 %N) {
; CHECK-LABEL: @foo(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 0, [[N:%.*]]
; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_END:%.*]]
; CHECK: for.body.lr.ph:
; CHECK-NEXT: [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[N]] to i64
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_INC:%.*]] ], [ 0, [[FOR_BODY_LR_PH]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[B:%.*]], i64 [[INDVARS_IV]]
; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* [[ARRAYIDX]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 2
; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, i32* [[C:%.*]], i64 [[TMP1]]
; CHECK-NEXT: [[TMP2:%.*]] = load i32, i32* [[ARRAYIDX2]], align 4
; CHECK-NEXT: [[ADD3:%.*]] = add nsw i32 [[TMP0]], [[TMP2]]
; CHECK-NEXT: [[TMP3:%.*]] = trunc i64 [[TMP1]] to i32
; CHECK-NEXT: [[DIV0:%.*]] = udiv i32 5, [[TMP3]]
; CHECK-NEXT: [[ADD4:%.*]] = add nsw i32 [[ADD3]], [[DIV0]]
; CHECK-NEXT: [[ARRAYIDX5:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i64 [[INDVARS_IV]]
; CHECK-NEXT: store i32 [[ADD4]], i32* [[ARRAYIDX5]], align 4
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_COND_FOR_END_CRIT_EDGE:%.*]]
; CHECK: for.cond.for.end_crit_edge:
; CHECK-NEXT: br label [[FOR_END]]
; CHECK: for.end:
; CHECK-NEXT: ret void
;
entry:
%cmp1 = icmp slt i32 0, %N
br i1 %cmp1, label %for.body.lr.ph, label %for.end
for.body.lr.ph: ; preds = %entry
br label %for.body
for.body: ; preds = %for.body.lr.ph, %for.inc
%i.02 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ]
%idxprom = sext i32 %i.02 to i64
%arrayidx = getelementptr inbounds i32, i32* %B, i64 %idxprom
%0 = load i32, i32* %arrayidx, align 4
%add = add nsw i32 %i.02, 2
%idxprom1 = zext i32 %add to i64
%arrayidx2 = getelementptr inbounds i32, i32* %C, i64 %idxprom1
%1 = load i32, i32* %arrayidx2, align 4
%add3 = add nsw i32 %0, %1
%div0 = udiv i32 5, %add
%add4 = add nsw i32 %add3, %div0
%idxprom4 = zext i32 %i.02 to i64
%arrayidx5 = getelementptr inbounds i32, i32* %A, i64 %idxprom4
store i32 %add4, i32* %arrayidx5, align 4
br label %for.inc
for.inc: ; preds = %for.body
%inc = add nsw i32 %i.02, 1
%cmp = icmp slt i32 %inc, %N
br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
for.cond.for.end_crit_edge: ; preds = %for.inc
br label %for.end
for.end: ; preds = %for.cond.for.end_crit_edge, %entry
ret void
}
define void @foo1(i32* %A, i32* %B, i32* %C, i32 %N) {
; CHECK-LABEL: @foo1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 0, [[N:%.*]]
; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_END:%.*]]
; CHECK: for.body.lr.ph:
; CHECK-NEXT: [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[N]] to i64
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_INC:%.*]] ], [ 0, [[FOR_BODY_LR_PH]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[B:%.*]], i64 [[INDVARS_IV]]
; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* [[ARRAYIDX]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 2
; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, i32* [[C:%.*]], i64 [[TMP1]]
; CHECK-NEXT: [[TMP2:%.*]] = load i32, i32* [[ARRAYIDX2]], align 4
; CHECK-NEXT: [[ADD3:%.*]] = add nsw i32 [[TMP0]], [[TMP2]]
; CHECK-NEXT: [[ARRAYIDX5:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i64 [[INDVARS_IV]]
; CHECK-NEXT: store i32 [[ADD3]], i32* [[ARRAYIDX5]], align 4
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_COND_FOR_END_CRIT_EDGE:%.*]]
; CHECK: for.cond.for.end_crit_edge:
; CHECK-NEXT: br label [[FOR_END]]
; CHECK: for.end:
; CHECK-NEXT: ret void
;
entry:
%cmp1 = icmp slt i32 0, %N
br i1 %cmp1, label %for.body.lr.ph, label %for.end
for.body.lr.ph: ; preds = %entry
br label %for.body
for.body: ; preds = %for.body.lr.ph, %for.inc
%i.02 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ]
%idxprom = zext i32 %i.02 to i64
%arrayidx = getelementptr inbounds i32, i32* %B, i64 %idxprom
%0 = load i32, i32* %arrayidx, align 4
%add = add nsw i32 %i.02, 2
%idxprom1 = sext i32 %add to i64
%arrayidx2 = getelementptr inbounds i32, i32* %C, i64 %idxprom1
%1 = load i32, i32* %arrayidx2, align 4
%add3 = add nsw i32 %0, %1
%idxprom4 = sext i32 %i.02 to i64
%arrayidx5 = getelementptr inbounds i32, i32* %A, i64 %idxprom4
store i32 %add3, i32* %arrayidx5, align 4
br label %for.inc
for.inc: ; preds = %for.body
%inc = add nsw i32 %i.02, 1
%cmp = icmp slt i32 %inc, %N
br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
for.cond.for.end_crit_edge: ; preds = %for.inc
br label %for.end
for.end: ; preds = %for.cond.for.end_crit_edge, %entry
ret void
}
@a = common global [100 x i32] zeroinitializer, align 16
@b = common global [100 x i32] zeroinitializer, align 16
define i32 @foo2(i32 %M) {
; CHECK-LABEL: @foo2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 0, [[M:%.*]]
; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_END:%.*]]
; CHECK: for.body.lr.ph:
; CHECK-NEXT: [[TMP0:%.*]] = sext i32 [[M]] to i64
; CHECK-NEXT: [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[M]] to i64
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_INC:%.*]] ], [ 0, [[FOR_BODY_LR_PH]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [100 x i32], [100 x i32]* @a, i64 0, i64 [[INDVARS_IV]]
; CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* [[ARRAYIDX]], align 4
; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds [100 x i32], [100 x i32]* @b, i64 0, i64 [[INDVARS_IV]]
; CHECK-NEXT: [[TMP2:%.*]] = load i32, i32* [[ARRAYIDX2]], align 4
; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[TMP1]], [[TMP2]]
; CHECK-NEXT: [[TMP3:%.*]] = add nsw i64 [[INDVARS_IV]], [[TMP0]]
; CHECK-NEXT: [[ARRAYIDX5:%.*]] = getelementptr inbounds [100 x i32], [100 x i32]* @a, i64 0, i64 [[TMP3]]
; CHECK-NEXT: store i32 [[ADD]], i32* [[ARRAYIDX5]], align 4
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_COND_FOR_END_CRIT_EDGE:%.*]]
; CHECK: for.cond.for.end_crit_edge:
; CHECK-NEXT: br label [[FOR_END]]
; CHECK: for.end:
; CHECK-NEXT: [[CALL:%.*]] = call i32 @dummy(i32* getelementptr inbounds ([100 x i32], [100 x i32]* @a, i32 0, i32 0), i32* getelementptr inbounds ([100 x i32], [100 x i32]* @b, i32 0, i32 0))
; CHECK-NEXT: ret i32 0
;
entry:
%cmp1 = icmp slt i32 0, %M
br i1 %cmp1, label %for.body.lr.ph, label %for.end
for.body.lr.ph: ; preds = %entry
br label %for.body
for.body: ; preds = %for.body.lr.ph, %for.inc
%i.02 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ]
%idxprom = zext i32 %i.02 to i64
%arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* @a, i64 0, i64 %idxprom
%0 = load i32, i32* %arrayidx, align 4
%idxprom1 = sext i32 %i.02 to i64
%arrayidx2 = getelementptr inbounds [100 x i32], [100 x i32]* @b, i64 0, i64 %idxprom1
%1 = load i32, i32* %arrayidx2, align 4
%add = add nsw i32 %0, %1
%add3 = add nsw i32 %i.02, %M
%idxprom4 = sext i32 %add3 to i64
%arrayidx5 = getelementptr inbounds [100 x i32], [100 x i32]* @a, i64 0, i64 %idxprom4
store i32 %add, i32* %arrayidx5, align 4
br label %for.inc
for.inc: ; preds = %for.body
%inc = add nsw i32 %i.02, 1
%cmp = icmp slt i32 %inc, %M
br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
for.cond.for.end_crit_edge: ; preds = %for.inc
br label %for.end
for.end: ; preds = %for.cond.for.end_crit_edge, %entry
%call = call i32 @dummy(i32* getelementptr inbounds ([100 x i32], [100 x i32]* @a, i32 0, i32 0), i32* getelementptr inbounds ([100 x i32], [100 x i32]* @b, i32 0, i32 0))
ret i32 0
}
declare i32 @dummy(i32*, i32*)
; A case where zext should not be eliminated when its operands could only be extended by sext.
define i32 @foo3(i32 %M) {
; CHECK-LABEL: @foo3(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 0, [[M:%.*]]
; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_END:%.*]]
; CHECK: for.body.lr.ph:
; CHECK-NEXT: [[TMP0:%.*]] = sext i32 [[M]] to i64
; CHECK-NEXT: [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[M]] to i64
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_INC:%.*]] ], [ 0, [[FOR_BODY_LR_PH]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [100 x i32], [100 x i32]* @a, i64 0, i64 [[INDVARS_IV]]
; CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* [[ARRAYIDX]], align 4
; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds [100 x i32], [100 x i32]* @b, i64 0, i64 [[INDVARS_IV]]
; CHECK-NEXT: [[TMP2:%.*]] = load i32, i32* [[ARRAYIDX2]], align 4
; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[TMP1]], [[TMP2]]
; CHECK-NEXT: [[TMP3:%.*]] = add nsw i64 [[INDVARS_IV]], [[TMP0]]
; CHECK-NEXT: [[TMP4:%.*]] = trunc i64 [[TMP3]] to i32
; CHECK-NEXT: [[IDXPROM4:%.*]] = zext i32 [[TMP4]] to i64
; CHECK-NEXT: [[ARRAYIDX5:%.*]] = getelementptr inbounds [100 x i32], [100 x i32]* @a, i64 0, i64 [[IDXPROM4]]
; CHECK-NEXT: store i32 [[ADD]], i32* [[ARRAYIDX5]], align 4
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_COND_FOR_END_CRIT_EDGE:%.*]]
; CHECK: for.cond.for.end_crit_edge:
; CHECK-NEXT: br label [[FOR_END]]
; CHECK: for.end:
; CHECK-NEXT: [[CALL:%.*]] = call i32 @dummy(i32* getelementptr inbounds ([100 x i32], [100 x i32]* @a, i32 0, i32 0), i32* getelementptr inbounds ([100 x i32], [100 x i32]* @b, i32 0, i32 0))
; CHECK-NEXT: ret i32 0
;
entry:
%cmp1 = icmp slt i32 0, %M
br i1 %cmp1, label %for.body.lr.ph, label %for.end
for.body.lr.ph: ; preds = %entry
br label %for.body
for.body: ; preds = %for.body.lr.ph, %for.inc
%i.02 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ]
%idxprom = sext i32 %i.02 to i64
%arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* @a, i64 0, i64 %idxprom
%0 = load i32, i32* %arrayidx, align 4
%idxprom1 = sext i32 %i.02 to i64
%arrayidx2 = getelementptr inbounds [100 x i32], [100 x i32]* @b, i64 0, i64 %idxprom1
%1 = load i32, i32* %arrayidx2, align 4
%add = add nsw i32 %0, %1
%add3 = add nsw i32 %i.02, %M
%idxprom4 = zext i32 %add3 to i64
%arrayidx5 = getelementptr inbounds [100 x i32], [100 x i32]* @a, i64 0, i64 %idxprom4
store i32 %add, i32* %arrayidx5, align 4
br label %for.inc
for.inc: ; preds = %for.body
%inc = add nsw i32 %i.02, 1
%cmp = icmp slt i32 %inc, %M
br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
for.cond.for.end_crit_edge: ; preds = %for.inc
br label %for.end
for.end: ; preds = %for.cond.for.end_crit_edge, %entry
%call = call i32 @dummy(i32* getelementptr inbounds ([100 x i32], [100 x i32]* @a, i32 0, i32 0), i32* getelementptr inbounds ([100 x i32], [100 x i32]* @b, i32 0, i32 0))
ret i32 0
}
%struct.image = type {i32, i32}
define i32 @foo4(%struct.image* %input, i32 %length, i32* %in) {
; CHECK-LABEL: @foo4(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[STRIDE:%.*]] = getelementptr inbounds [[STRUCT_IMAGE:%.*]], %struct.image* [[INPUT:%.*]], i64 0, i32 1
; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* [[STRIDE]], align 4
; CHECK-NEXT: [[CMP17:%.*]] = icmp sgt i32 [[LENGTH:%.*]], 1
; CHECK-NEXT: br i1 [[CMP17]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_COND_CLEANUP:%.*]]
; CHECK: for.body.lr.ph:
; CHECK-NEXT: [[CHANNEL:%.*]] = getelementptr inbounds [[STRUCT_IMAGE]], %struct.image* [[INPUT]], i64 0, i32 0
; CHECK-NEXT: [[TMP1:%.*]] = sext i32 [[TMP0]] to i64
; CHECK-NEXT: [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[LENGTH]] to i64
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.cond.cleanup.loopexit:
; CHECK-NEXT: [[TMP2:%.*]] = phi i32 [ [[TMP10:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT: br label [[FOR_COND_CLEANUP]]
; CHECK: for.cond.cleanup:
; CHECK-NEXT: [[TMP3:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[TMP2]], [[FOR_COND_CLEANUP_LOOPEXIT:%.*]] ]
; CHECK-NEXT: ret i32 [[TMP3]]
; CHECK: for.body:
; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ], [ 1, [[FOR_BODY_LR_PH]] ]
; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT: [[TMP4:%.*]] = load i32, i32* [[CHANNEL]], align 8
; CHECK-NEXT: [[TMP5:%.*]] = sext i32 [[TMP4]] to i64
; CHECK-NEXT: [[TMP6:%.*]] = mul nsw i64 [[TMP5]], [[INDVARS_IV_NEXT]]
; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i32, i32* [[IN:%.*]], i64 [[TMP6]]
; CHECK-NEXT: [[TMP7:%.*]] = load i32, i32* [[ADD_PTR]], align 4
; CHECK-NEXT: [[TMP8:%.*]] = mul nsw i64 [[TMP1]], [[INDVARS_IV_NEXT]]
; CHECK-NEXT: [[ADD_PTR1:%.*]] = getelementptr inbounds i32, i32* [[IN]], i64 [[TMP8]]
; CHECK-NEXT: [[TMP9:%.*]] = load i32, i32* [[ADD_PTR1]], align 4
; CHECK-NEXT: [[TMP10]] = add i32 [[TMP7]], [[TMP9]]
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_COND_CLEANUP_LOOPEXIT]]
;
entry:
%stride = getelementptr inbounds %struct.image, %struct.image* %input, i64 0, i32 1
%0 = load i32, i32* %stride, align 4
%cmp17 = icmp sgt i32 %length, 1
br i1 %cmp17, label %for.body.lr.ph, label %for.cond.cleanup
for.body.lr.ph: ; preds = %entry
%channel = getelementptr inbounds %struct.image, %struct.image* %input, i64 0, i32 0
br label %for.body
for.cond.cleanup.loopexit: ; preds = %for.body
%1 = phi i32 [ %6, %for.body ]
br label %for.cond.cleanup
for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
%2 = phi i32 [ 0, %entry ], [ %1, %for.cond.cleanup.loopexit ]
ret i32 %2
; mul instruction below is widened instead of generating a truncate instruction for it
; regardless if Load operand of mul is inside or outside the loop (we have both cases).
for.body: ; preds = %for.body.lr.ph, %for.body
%x.018 = phi i32 [ 1, %for.body.lr.ph ], [ %add, %for.body ]
%add = add nuw nsw i32 %x.018, 1
%3 = load i32, i32* %channel, align 8
%mul = mul nsw i32 %3, %add
%idx.ext = sext i32 %mul to i64
%add.ptr = getelementptr inbounds i32, i32* %in, i64 %idx.ext
%4 = load i32, i32* %add.ptr, align 4
%mul1 = mul nsw i32 %0, %add
%idx.ext1 = sext i32 %mul1 to i64
%add.ptr1 = getelementptr inbounds i32, i32* %in, i64 %idx.ext1
%5 = load i32, i32* %add.ptr1, align 4
%6 = add i32 %4, %5
%cmp = icmp slt i32 %add, %length
br i1 %cmp, label %for.body, label %for.cond.cleanup.loopexit
}
define i32 @foo5(%struct.image* %input, i32 %length, i32* %in) {
; CHECK-LABEL: @foo5(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[STRIDE:%.*]] = getelementptr inbounds [[STRUCT_IMAGE:%.*]], %struct.image* [[INPUT:%.*]], i64 0, i32 1
; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* [[STRIDE]], align 4
; CHECK-NEXT: [[CMP17:%.*]] = icmp sgt i32 [[LENGTH:%.*]], 1
; CHECK-NEXT: br i1 [[CMP17]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_COND_CLEANUP:%.*]]
; CHECK: for.body.lr.ph:
; CHECK-NEXT: [[CHANNEL:%.*]] = getelementptr inbounds [[STRUCT_IMAGE]], %struct.image* [[INPUT]], i64 0, i32 0
; CHECK-NEXT: [[TMP1:%.*]] = sext i32 [[TMP0]] to i64
; CHECK-NEXT: [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[LENGTH]] to i64
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.cond.cleanup.loopexit:
; CHECK-NEXT: [[TMP2:%.*]] = phi i32 [ [[TMP10:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT: br label [[FOR_COND_CLEANUP]]
; CHECK: for.cond.cleanup:
; CHECK-NEXT: [[TMP3:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[TMP2]], [[FOR_COND_CLEANUP_LOOPEXIT:%.*]] ]
; CHECK-NEXT: ret i32 [[TMP3]]
; CHECK: for.body:
; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ], [ 1, [[FOR_BODY_LR_PH]] ]
; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT: [[TMP4:%.*]] = load i32, i32* [[CHANNEL]], align 8
; CHECK-NEXT: [[TMP5:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT: [[MUL:%.*]] = mul nsw i32 [[TMP4]], [[TMP5]]
; CHECK-NEXT: [[IDX_EXT:%.*]] = sext i32 [[MUL]] to i64
; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i32, i32* [[IN:%.*]], i64 [[IDX_EXT]]
; CHECK-NEXT: [[TMP6:%.*]] = load i32, i32* [[ADD_PTR]], align 4
; CHECK-NEXT: [[TMP7:%.*]] = mul nsw i64 [[TMP1]], [[INDVARS_IV_NEXT]]
; CHECK-NEXT: [[ADD_PTR1:%.*]] = getelementptr inbounds i32, i32* [[IN]], i64 [[TMP7]]
; CHECK-NEXT: [[TMP8:%.*]] = load i32, i32* [[ADD_PTR1]], align 4
; CHECK-NEXT: [[TMP9:%.*]] = add i32 [[TMP6]], [[TMP8]]
; CHECK-NEXT: [[TMP10]] = add i32 [[TMP9]], [[MUL]]
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_COND_CLEANUP_LOOPEXIT]]
;
entry:
%stride = getelementptr inbounds %struct.image, %struct.image* %input, i64 0, i32 1
%0 = load i32, i32* %stride, align 4
%cmp17 = icmp sgt i32 %length, 1
br i1 %cmp17, label %for.body.lr.ph, label %for.cond.cleanup
for.body.lr.ph: ; preds = %entry
%channel = getelementptr inbounds %struct.image, %struct.image* %input, i64 0, i32 0
br label %for.body
for.cond.cleanup.loopexit: ; preds = %for.body
%1 = phi i32 [ %7, %for.body ]
br label %for.cond.cleanup
for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
%2 = phi i32 [ 0, %entry ], [ %1, %for.cond.cleanup.loopexit ]
ret i32 %2
; This example is the same as above except that the first mul is used in two places
; and this may result in having two versions of the multiply: an i32 and i64 version.
; In this case, keep the trucate instructions to avoid this redundancy.
for.body: ; preds = %for.body.lr.ph, %for.body
%x.018 = phi i32 [ 1, %for.body.lr.ph ], [ %add, %for.body ]
%add = add nuw nsw i32 %x.018, 1
%3 = load i32, i32* %channel, align 8
%mul = mul nsw i32 %3, %add
%idx.ext = sext i32 %mul to i64
%add.ptr = getelementptr inbounds i32, i32* %in, i64 %idx.ext
%4 = load i32, i32* %add.ptr, align 4
%mul1 = mul nsw i32 %0, %add
%idx.ext1 = sext i32 %mul1 to i64
%add.ptr1 = getelementptr inbounds i32, i32* %in, i64 %idx.ext1
%5 = load i32, i32* %add.ptr1, align 4
%6 = add i32 %4, %5
%7 = add i32 %6, %mul
%cmp = icmp slt i32 %add, %length
br i1 %cmp, label %for.body, label %for.cond.cleanup.loopexit
}
define i32 @foo6(%struct.image* %input, i32 %length, i32* %in) {
entry:
%stride = getelementptr inbounds %struct.image, %struct.image* %input, i64 0, i32 1
%0 = load i32, i32* %stride, align 4
%cmp17 = icmp sgt i32 %length, 1
br i1 %cmp17, label %for.body.lr.ph, label %for.cond.cleanup
for.body.lr.ph: ; preds = %entry
%channel = getelementptr inbounds %struct.image, %struct.image* %input, i64 0, i32 0
br label %for.body
for.cond.cleanup.loopexit: ; preds = %for.body
%1 = phi i32 [ %6, %for.body ]
br label %for.cond.cleanup
for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
%2 = phi i32 [ 0, %entry ], [ %1, %for.cond.cleanup.loopexit ]
ret i32 %2
; Extend foo4 so that any loop variants (%3 and %or) with mul/sub/add then extend will not
; need a trunc instruction
; CHECK: for.body:
; CHECK-NOT: trunc
; CHECK: [[TMP0:%.*]] = and i32 %length, %0
; CHECK-NEXT: zext i32 [[TMP0]] to i64
; CHECK: [[TMP1:%.*]] = or i32 %length, [[TMP2:%.*]]
; CHECK-NEXT: zext i32 [[TMP1]] to i64
for.body: ; preds = %for.body.lr.ph, %for.body
%x.018 = phi i32 [ 1, %for.body.lr.ph ], [ %add, %for.body ]
%add = add nuw nsw i32 %x.018, 1
%3 = and i32 %length, %0
%mul = mul nuw i32 %3, %add
%idx.ext = zext i32 %mul to i64
%add.ptr = getelementptr inbounds i32, i32* %in, i64 %idx.ext
%4 = load i32, i32* %add.ptr, align 4
%mul1 = mul nuw i32 %0, %add
%idx.ext1 = zext i32 %mul1 to i64
%add.ptr1 = getelementptr inbounds i32, i32* %in, i64 %idx.ext1
%5 = load i32, i32* %add.ptr1, align 4
%or = or i32 %length, %5
%sub.or = sub nuw i32 %or, %add
%or.ext = zext i32 %sub.or to i64
%ptr.or = getelementptr inbounds i32, i32* %in, i64 %or.ext
%val.or = load i32, i32* %ptr.or
%6 = add i32 %4, %val.or
%cmp = icmp ult i32 %add, %length
br i1 %cmp, label %for.body, label %for.cond.cleanup.loopexit
}