1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -indvars -S < %s | FileCheck %s
4 define void @ult(i64 %n, i64 %m) {
7 ; CHECK-NEXT: [[CMP0:%.*]] = icmp ult i64 [[N:%.*]], [[M:%.*]]
8 ; CHECK-NEXT: br i1 [[CMP0]], label [[LOOP_PREHEADER:%.*]], label [[EXIT:%.*]]
9 ; CHECK: loop.preheader:
10 ; CHECK-NEXT: br label [[LOOP:%.*]]
12 ; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LATCH:%.*]] ], [ 0, [[LOOP_PREHEADER]] ]
13 ; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1
14 ; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i64 [[IV]], [[N]]
15 ; CHECK-NEXT: br i1 [[CMP1]], label [[LATCH]], label [[EXIT_LOOPEXIT:%.*]]
17 ; CHECK-NEXT: call void @side_effect()
18 ; CHECK-NEXT: br i1 true, label [[LOOP]], label [[EXIT_LOOPEXIT]]
19 ; CHECK: exit.loopexit:
20 ; CHECK-NEXT: br label [[EXIT]]
22 ; CHECK-NEXT: ret void
25 %cmp0 = icmp ult i64 %n, %m
26 br i1 %cmp0, label %loop, label %exit
28 %iv = phi i64 [ 0, %entry ], [ %iv.next, %latch ]
29 %iv.next = add i64 %iv, 1
30 %cmp1 = icmp ult i64 %iv, %n
31 br i1 %cmp1, label %latch, label %exit
33 call void @side_effect()
34 %cmp2 = icmp ult i64 %iv, %m
35 br i1 %cmp2, label %loop, label %exit
40 define void @ugt(i64 %n, i64 %m) {
43 ; CHECK-NEXT: [[CMP0:%.*]] = icmp ugt i64 [[N:%.*]], [[M:%.*]]
44 ; CHECK-NEXT: br i1 [[CMP0]], label [[LOOP_PREHEADER:%.*]], label [[EXIT:%.*]]
45 ; CHECK: loop.preheader:
46 ; CHECK-NEXT: br label [[LOOP:%.*]]
48 ; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LATCH:%.*]] ], [ 0, [[LOOP_PREHEADER]] ]
49 ; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1
50 ; CHECK-NEXT: br i1 true, label [[LATCH]], label [[EXIT_LOOPEXIT:%.*]]
52 ; CHECK-NEXT: call void @side_effect()
53 ; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i64 [[IV]], [[M]]
54 ; CHECK-NEXT: br i1 [[CMP2]], label [[LOOP]], label [[EXIT_LOOPEXIT]]
55 ; CHECK: exit.loopexit:
56 ; CHECK-NEXT: br label [[EXIT]]
58 ; CHECK-NEXT: ret void
61 %cmp0 = icmp ugt i64 %n, %m
62 br i1 %cmp0, label %loop, label %exit
64 %iv = phi i64 [ 0, %entry ], [ %iv.next, %latch ]
65 %iv.next = add i64 %iv, 1
66 %cmp1 = icmp ult i64 %iv, %n
67 br i1 %cmp1, label %latch, label %exit
69 call void @side_effect()
70 %cmp2 = icmp ult i64 %iv, %m
71 br i1 %cmp2, label %loop, label %exit
76 define void @ule(i64 %n, i64 %m) {
79 ; CHECK-NEXT: [[CMP0:%.*]] = icmp ule i64 [[N:%.*]], [[M:%.*]]
80 ; CHECK-NEXT: br i1 [[CMP0]], label [[LOOP_PREHEADER:%.*]], label [[EXIT:%.*]]
81 ; CHECK: loop.preheader:
82 ; CHECK-NEXT: br label [[LOOP:%.*]]
84 ; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LATCH:%.*]] ], [ 0, [[LOOP_PREHEADER]] ]
85 ; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1
86 ; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i64 [[IV]], [[N]]
87 ; CHECK-NEXT: br i1 [[CMP1]], label [[LATCH]], label [[EXIT_LOOPEXIT:%.*]]
89 ; CHECK-NEXT: call void @side_effect()
90 ; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i64 [[IV]], [[M]]
91 ; CHECK-NEXT: br i1 [[CMP2]], label [[LOOP]], label [[EXIT_LOOPEXIT]]
92 ; CHECK: exit.loopexit:
93 ; CHECK-NEXT: br label [[EXIT]]
95 ; CHECK-NEXT: ret void
98 %cmp0 = icmp ule i64 %n, %m
99 br i1 %cmp0, label %loop, label %exit
101 %iv = phi i64 [ 0, %entry ], [ %iv.next, %latch ]
102 %iv.next = add i64 %iv, 1
103 %cmp1 = icmp ult i64 %iv, %n
104 br i1 %cmp1, label %latch, label %exit
106 call void @side_effect()
107 %cmp2 = icmp ult i64 %iv, %m
108 br i1 %cmp2, label %loop, label %exit
113 define void @uge(i64 %n, i64 %m) {
116 ; CHECK-NEXT: [[CMP0:%.*]] = icmp uge i64 [[N:%.*]], [[M:%.*]]
117 ; CHECK-NEXT: br i1 [[CMP0]], label [[LOOP_PREHEADER:%.*]], label [[EXIT:%.*]]
118 ; CHECK: loop.preheader:
119 ; CHECK-NEXT: br label [[LOOP:%.*]]
121 ; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LATCH:%.*]] ], [ 0, [[LOOP_PREHEADER]] ]
122 ; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1
123 ; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i64 [[IV]], [[N]]
124 ; CHECK-NEXT: br i1 [[CMP1]], label [[LATCH]], label [[EXIT_LOOPEXIT:%.*]]
126 ; CHECK-NEXT: call void @side_effect()
127 ; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i64 [[IV]], [[M]]
128 ; CHECK-NEXT: br i1 [[CMP2]], label [[LOOP]], label [[EXIT_LOOPEXIT]]
129 ; CHECK: exit.loopexit:
130 ; CHECK-NEXT: br label [[EXIT]]
132 ; CHECK-NEXT: ret void
135 %cmp0 = icmp uge i64 %n, %m
136 br i1 %cmp0, label %loop, label %exit
138 %iv = phi i64 [ 0, %entry ], [ %iv.next, %latch ]
139 %iv.next = add i64 %iv, 1
140 %cmp1 = icmp ult i64 %iv, %n
141 br i1 %cmp1, label %latch, label %exit
143 call void @side_effect()
144 %cmp2 = icmp ult i64 %iv, %m
145 br i1 %cmp2, label %loop, label %exit
151 define void @ult_const_max(i64 %n) {
152 ; CHECK-LABEL: @ult_const_max(
154 ; CHECK-NEXT: [[CMP0:%.*]] = icmp ult i64 [[N:%.*]], 20
155 ; CHECK-NEXT: br i1 [[CMP0]], label [[LOOP_PREHEADER:%.*]], label [[EXIT:%.*]]
156 ; CHECK: loop.preheader:
157 ; CHECK-NEXT: br label [[LOOP:%.*]]
159 ; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LATCH:%.*]] ], [ 0, [[LOOP_PREHEADER]] ]
160 ; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
161 ; CHECK-NEXT: br i1 true, label [[LATCH]], label [[EXIT_LOOPEXIT:%.*]]
163 ; CHECK-NEXT: call void @side_effect()
164 ; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i64 [[IV]], [[N]]
165 ; CHECK-NEXT: br i1 [[CMP2]], label [[LOOP]], label [[EXIT_LOOPEXIT]]
166 ; CHECK: exit.loopexit:
167 ; CHECK-NEXT: br label [[EXIT]]
169 ; CHECK-NEXT: ret void
172 %cmp0 = icmp ult i64 %n, 20
173 br i1 %cmp0, label %loop, label %exit
175 %iv = phi i64 [ 0, %entry ], [ %iv.next, %latch ]
176 %iv.next = add i64 %iv, 1
177 %udiv = udiv i64 %iv, 10
178 %cmp1 = icmp ult i64 %udiv, 2
179 br i1 %cmp1, label %latch, label %exit
181 call void @side_effect()
182 %cmp2 = icmp ult i64 %iv, %n
183 br i1 %cmp2, label %loop, label %exit
188 define void @mixed_width(i32 %len) {
189 ; CHECK-LABEL: @mixed_width(
191 ; CHECK-NEXT: [[LEN_ZEXT:%.*]] = zext i32 [[LEN:%.*]] to i64
192 ; CHECK-NEXT: br label [[LOOP:%.*]]
194 ; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
195 ; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
196 ; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i64 [[IV]], [[LEN_ZEXT]]
197 ; CHECK-NEXT: br i1 [[CMP1]], label [[BACKEDGE]], label [[EXIT:%.*]]
199 ; CHECK-NEXT: call void @side_effect()
200 ; CHECK-NEXT: br i1 true, label [[LOOP]], label [[EXIT]]
202 ; CHECK-NEXT: ret void
205 %len.zext = zext i32 %len to i64
208 %iv = phi i64 [0, %entry], [%iv.next, %backedge]
209 %iv2 = phi i32 [0, %entry], [%iv2.next, %backedge]
210 %iv.next = add i64 %iv, 1
211 %iv2.next = add i32 %iv2, 1
212 %cmp1 = icmp ult i64 %iv, %len.zext
213 br i1 %cmp1, label %backedge, label %exit
216 call void @side_effect()
217 %cmp2 = icmp ult i32 %iv2, %len
218 br i1 %cmp2, label %loop, label %exit
223 define void @many_exits([100 x i64] %len) {
227 %iv = phi i64 [0, %entry], [%iv.next, %backedge]
228 %len0 = extractvalue [100 x i64] %len, 0
229 %early0 = icmp eq i64 %iv, %len0
230 call void @side_effect()
231 br i1 %early0, label %exit, label %cont0
233 %len1 = extractvalue [100 x i64] %len, 1
234 %early1 = icmp eq i64 %iv, %len1
235 call void @side_effect()
236 br i1 %early1, label %exit, label %cont1
238 %len2 = extractvalue [100 x i64] %len, 2
239 %early2 = icmp eq i64 %iv, %len2
240 call void @side_effect()
241 br i1 %early2, label %exit, label %cont2
243 %len3 = extractvalue [100 x i64] %len, 3
244 %early3 = icmp eq i64 %iv, %len3
245 call void @side_effect()
246 br i1 %early3, label %exit, label %cont3
248 %len4 = extractvalue [100 x i64] %len, 4
249 %early4 = icmp eq i64 %iv, %len4
250 call void @side_effect()
251 br i1 %early4, label %exit, label %cont4
253 %len5 = extractvalue [100 x i64] %len, 5
254 %early5 = icmp eq i64 %iv, %len5
255 call void @side_effect()
256 br i1 %early5, label %exit, label %cont5
258 %len6 = extractvalue [100 x i64] %len, 6
259 %early6 = icmp eq i64 %iv, %len6
260 call void @side_effect()
261 br i1 %early6, label %exit, label %cont6
263 %len7 = extractvalue [100 x i64] %len, 7
264 %early7 = icmp eq i64 %iv, %len7
265 call void @side_effect()
266 br i1 %early7, label %exit, label %cont7
268 %len8 = extractvalue [100 x i64] %len, 8
269 %early8 = icmp eq i64 %iv, %len8
270 call void @side_effect()
271 br i1 %early8, label %exit, label %cont8
273 %len9 = extractvalue [100 x i64] %len, 9
274 %early9 = icmp eq i64 %iv, %len9
275 call void @side_effect()
276 br i1 %early9, label %exit, label %cont9
278 %len10 = extractvalue [100 x i64] %len, 10
279 %early10 = icmp eq i64 %iv, %len10
280 call void @side_effect()
281 br i1 %early10, label %exit, label %cont10
283 %len11 = extractvalue [100 x i64] %len, 11
284 %early11 = icmp eq i64 %iv, %len11
285 call void @side_effect()
286 br i1 %early11, label %exit, label %cont11
288 %len12 = extractvalue [100 x i64] %len, 12
289 %early12 = icmp eq i64 %iv, %len12
290 call void @side_effect()
291 br i1 %early12, label %exit, label %cont12
293 %len13 = extractvalue [100 x i64] %len, 13
294 %early13 = icmp eq i64 %iv, %len13
295 call void @side_effect()
296 br i1 %early13, label %exit, label %cont13
298 %len14 = extractvalue [100 x i64] %len, 14
299 %early14 = icmp eq i64 %iv, %len14
300 call void @side_effect()
301 br i1 %early14, label %exit, label %cont14
303 %len15 = extractvalue [100 x i64] %len, 15
304 %early15 = icmp eq i64 %iv, %len15
305 call void @side_effect()
306 br i1 %early15, label %exit, label %cont15
308 %len16 = extractvalue [100 x i64] %len, 16
309 %early16 = icmp eq i64 %iv, %len16
310 call void @side_effect()
311 br i1 %early16, label %exit, label %cont16
313 %len17 = extractvalue [100 x i64] %len, 17
314 %early17 = icmp eq i64 %iv, %len17
315 call void @side_effect()
316 br i1 %early17, label %exit, label %cont17
318 %len18 = extractvalue [100 x i64] %len, 18
319 %early18 = icmp eq i64 %iv, %len18
320 call void @side_effect()
321 br i1 %early18, label %exit, label %cont18
323 %len19 = extractvalue [100 x i64] %len, 19
324 %early19 = icmp eq i64 %iv, %len19
325 call void @side_effect()
326 br i1 %early19, label %exit, label %cont19
328 %len20 = extractvalue [100 x i64] %len, 20
329 %early20 = icmp eq i64 %iv, %len20
330 call void @side_effect()
331 br i1 %early20, label %exit, label %cont20
333 %len21 = extractvalue [100 x i64] %len, 21
334 %early21 = icmp eq i64 %iv, %len21
335 call void @side_effect()
336 br i1 %early21, label %exit, label %cont21
338 %len22 = extractvalue [100 x i64] %len, 22
339 %early22 = icmp eq i64 %iv, %len22
340 call void @side_effect()
341 br i1 %early22, label %exit, label %cont22
343 %len23 = extractvalue [100 x i64] %len, 23
344 %early23 = icmp eq i64 %iv, %len23
345 call void @side_effect()
346 br i1 %early23, label %exit, label %cont23
348 %len24 = extractvalue [100 x i64] %len, 24
349 %early24 = icmp eq i64 %iv, %len24
350 call void @side_effect()
351 br i1 %early24, label %exit, label %cont24
353 %len25 = extractvalue [100 x i64] %len, 25
354 %early25 = icmp eq i64 %iv, %len25
355 call void @side_effect()
356 br i1 %early25, label %exit, label %cont25
358 %len26 = extractvalue [100 x i64] %len, 26
359 %early26 = icmp eq i64 %iv, %len26
360 call void @side_effect()
361 br i1 %early26, label %exit, label %cont26
363 %len27 = extractvalue [100 x i64] %len, 27
364 %early27 = icmp eq i64 %iv, %len27
365 call void @side_effect()
366 br i1 %early27, label %exit, label %cont27
368 %len28 = extractvalue [100 x i64] %len, 28
369 %early28 = icmp eq i64 %iv, %len28
370 call void @side_effect()
371 br i1 %early28, label %exit, label %cont28
373 %len29 = extractvalue [100 x i64] %len, 29
374 %early29 = icmp eq i64 %iv, %len29
375 call void @side_effect()
376 br i1 %early29, label %exit, label %cont29
378 %len30 = extractvalue [100 x i64] %len, 30
379 %early30 = icmp eq i64 %iv, %len30
380 call void @side_effect()
381 br i1 %early30, label %exit, label %cont30
383 %len31 = extractvalue [100 x i64] %len, 31
384 %early31 = icmp eq i64 %iv, %len31
385 call void @side_effect()
386 br i1 %early31, label %exit, label %cont31
388 %len32 = extractvalue [100 x i64] %len, 32
389 %early32 = icmp eq i64 %iv, %len32
390 call void @side_effect()
391 br i1 %early32, label %exit, label %cont32
393 %len33 = extractvalue [100 x i64] %len, 33
394 %early33 = icmp eq i64 %iv, %len33
395 call void @side_effect()
396 br i1 %early33, label %exit, label %cont33
398 %len34 = extractvalue [100 x i64] %len, 34
399 %early34 = icmp eq i64 %iv, %len34
400 call void @side_effect()
401 br i1 %early34, label %exit, label %cont34
403 %len35 = extractvalue [100 x i64] %len, 35
404 %early35 = icmp eq i64 %iv, %len35
405 call void @side_effect()
406 br i1 %early35, label %exit, label %cont35
408 %len36 = extractvalue [100 x i64] %len, 36
409 %early36 = icmp eq i64 %iv, %len36
410 call void @side_effect()
411 br i1 %early36, label %exit, label %cont36
413 %len37 = extractvalue [100 x i64] %len, 37
414 %early37 = icmp eq i64 %iv, %len37
415 call void @side_effect()
416 br i1 %early37, label %exit, label %cont37
418 %len38 = extractvalue [100 x i64] %len, 38
419 %early38 = icmp eq i64 %iv, %len38
420 call void @side_effect()
421 br i1 %early38, label %exit, label %cont38
423 %len39 = extractvalue [100 x i64] %len, 39
424 %early39 = icmp eq i64 %iv, %len39
425 call void @side_effect()
426 br i1 %early39, label %exit, label %cont39
430 call void @side_effect()
431 %cmp2 = icmp ult i64 %iv, 999
432 %iv.next = add i64 %iv, 1
433 br i1 %cmp2, label %loop, label %exit
438 declare void @side_effect()
440 ; The exit condition %outer.cond.1 depends on a phi in %inner. Make sure we do
441 ; not incorrectly determine %x.lcssa <= -1.
442 define i32 @exit_cond_depends_on_inner_loop() {
443 ; CHECK-LABEL: @exit_cond_depends_on_inner_loop(
445 ; CHECK-NEXT: br label [[OUTER_HEADER:%.*]]
446 ; CHECK: outer.header:
447 ; CHECK-NEXT: [[IV_OUTER:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_OUTER_NEXT:%.*]], [[OUTER_LATCH:%.*]] ]
448 ; CHECK-NEXT: br label [[INNER:%.*]]
450 ; CHECK-NEXT: [[X:%.*]] = phi i32 [ -1, [[OUTER_HEADER]] ], [ [[CALL:%.*]], [[INNER]] ]
451 ; CHECK-NEXT: [[CALL]] = call i32 @match()
452 ; CHECK-NEXT: [[INNER_COND:%.*]] = icmp sgt i32 [[CALL]], -1
453 ; CHECK-NEXT: br i1 [[INNER_COND]], label [[INNER]], label [[OUTER_EXITING_1:%.*]]
454 ; CHECK: outer.exiting.1:
455 ; CHECK-NEXT: [[X_LCSSA:%.*]] = phi i32 [ [[X]], [[INNER]] ]
456 ; CHECK-NEXT: [[OUTER_COND_1:%.*]] = icmp sgt i32 [[X_LCSSA]], -1
457 ; CHECK-NEXT: br i1 [[OUTER_COND_1]], label [[EXIT:%.*]], label [[OUTER_LATCH]]
458 ; CHECK: outer.latch:
459 ; CHECK-NEXT: [[IV_OUTER_NEXT]] = add nuw nsw i32 [[IV_OUTER]], 1
460 ; CHECK-NEXT: [[OUTER_COND_2:%.*]] = icmp ult i32 [[IV_OUTER]], 100
461 ; CHECK-NEXT: br i1 [[OUTER_COND_2]], label [[OUTER_HEADER]], label [[EXIT]]
463 ; CHECK-NEXT: [[X_RES:%.*]] = phi i32 [ [[X_LCSSA]], [[OUTER_EXITING_1]] ], [ -1, [[OUTER_LATCH]] ]
464 ; CHECK-NEXT: ret i32 [[X_RES]]
467 br label %outer.header
470 %iv.outer = phi i32 [ 0, %entry ], [ %iv.outer.next , %outer.latch ]
474 %x = phi i32 [ -1, %outer.header ], [ %call, %inner ]
475 %call = call i32 @match()
476 %inner.cond = icmp sgt i32 %call, -1
477 br i1 %inner.cond, label %inner, label %outer.exiting.1
480 %x.lcssa = phi i32 [ %x, %inner ]
481 %outer.cond.1 = icmp sgt i32 %x.lcssa, -1
482 br i1 %outer.cond.1, label %exit, label %outer.latch
485 %iv.outer.next = add nuw nsw i32 %iv.outer, 1
486 %outer.cond.2 = icmp ult i32 %iv.outer, 100
487 br i1 %outer.cond.2, label %outer.header, label %exit
490 %x.res = phi i32 [ %x.lcssa, %outer.exiting.1 ], [ -1, %outer.latch ]