1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -instcombine -S | FileCheck %s
4 define <4 x i32> @lshr_non_splat_vector(<4 x i32> %A) {
5 ; CHECK-LABEL: @lshr_non_splat_vector(
6 ; CHECK-NEXT: [[B:%.*]] = lshr <4 x i32> [[A:%.*]], <i32 32, i32 1, i32 2, i32 3>
7 ; CHECK-NEXT: ret <4 x i32> [[B]]
9 %B = lshr <4 x i32> %A, <i32 32, i32 1, i32 2, i32 3>
13 define <4 x i32> @shl_non_splat_vector(<4 x i32> %A) {
14 ; CHECK-LABEL: @shl_non_splat_vector(
15 ; CHECK-NEXT: [[B:%.*]] = shl <4 x i32> [[A:%.*]], <i32 32, i32 1, i32 2, i32 3>
16 ; CHECK-NEXT: ret <4 x i32> [[B]]
18 %B = shl <4 x i32> %A, <i32 32, i32 1, i32 2, i32 3>
22 define i32 @test6(i32 %A) {
23 ; CHECK-LABEL: @test6(
24 ; CHECK-NEXT: [[C:%.*]] = mul i32 %A, 6
25 ; CHECK-NEXT: ret i32 [[C]]
27 %B = shl i32 %A, 1 ;; convert to an mul instruction
32 define i32 @test6a(i32 %A) {
33 ; CHECK-LABEL: @test6a(
34 ; CHECK-NEXT: [[C:%.*]] = mul i32 %A, 6
35 ; CHECK-NEXT: ret i32 [[C]]
38 %C = shl i32 %B, 1 ;; convert to an mul instruction
42 ;; (A << 5) << 3 === A << 8 == 0
43 define i8 @test8(i8 %A) {
44 ; CHECK-LABEL: @test8(
45 ; CHECK-NEXT: ret i8 0
52 ;; (A << 7) >> 7 === A & 1
53 define i8 @test9(i8 %A) {
54 ; CHECK-LABEL: @test9(
55 ; CHECK-NEXT: [[B:%.*]] = and i8 %A, 1
56 ; CHECK-NEXT: ret i8 [[B]]
63 ;; (A >> 7) << 7 === A & 128
65 define i8 @test10(i8 %A) {
66 ; CHECK-LABEL: @test10(
67 ; CHECK-NEXT: [[B:%.*]] = and i8 %A, -128
68 ; CHECK-NEXT: ret i8 [[B]]
75 ;; Allow the simplification when the lshr shift is exact.
76 define i8 @test10a(i8 %A) {
77 ; CHECK-LABEL: @test10a(
78 ; CHECK-NEXT: ret i8 %A
80 %B = lshr exact i8 %A, 7
85 ;; This transformation is deferred to DAGCombine:
86 ;; (A >> 3) << 4 === (A & 0x1F) << 1
87 ;; The shl may be valuable to scalar evolution.
88 define i8 @test11(i8 %A) {
89 ; CHECK-LABEL: @test11(
90 ; CHECK-NEXT: [[A:%.*]] = mul i8 %A, 3
91 ; CHECK-NEXT: [[B:%.*]] = lshr i8 [[A]], 3
92 ; CHECK-NEXT: [[C:%.*]] = shl i8 [[B]], 4
93 ; CHECK-NEXT: ret i8 [[C]]
101 ;; Allow the simplification in InstCombine when the lshr shift is exact.
102 define i8 @test11a(i8 %A) {
103 ; CHECK-LABEL: @test11a(
104 ; CHECK-NEXT: [[C:%.*]] = mul i8 %A, 6
105 ; CHECK-NEXT: ret i8 [[C]]
108 %B = lshr exact i8 %a, 3
113 ;; This is deferred to DAGCombine unless %B is single-use.
114 ;; (A >> 8) << 8 === A & -256
115 define i32 @test12(i32 %A) {
116 ; CHECK-LABEL: @test12(
117 ; CHECK-NEXT: [[B1:%.*]] = and i32 %A, -256
118 ; CHECK-NEXT: ret i32 [[B1]]
125 ;; ((A >>s 6) << 6 === (A & FFFFFFC0)
126 define i8 @shishi(i8 %x) {
127 ; CHECK-LABEL: @shishi(
128 ; CHECK-NEXT: [[A:%.*]] = ashr i8 [[X:%.*]], 6
129 ; CHECK-NEXT: [[B:%.*]] = and i8 [[X]], -64
130 ; CHECK-NEXT: [[EXTRA_USE_OF_A:%.*]] = mul nsw i8 [[A]], 5
131 ; CHECK-NEXT: [[R:%.*]] = sdiv i8 [[EXTRA_USE_OF_A]], [[B]]
132 ; CHECK-NEXT: ret i8 [[R]]
136 %extra_use_of_a = mul i8 %a, 5
137 %r = sdiv i8 %extra_use_of_a, %b
141 ;; This transformation is deferred to DAGCombine:
142 ;; (A >> 3) << 4 === (A & -8) * 2
143 ;; The shl may be valuable to scalar evolution.
144 define i8 @test13(i8 %A) {
145 ; CHECK-LABEL: @test13(
146 ; CHECK-NEXT: [[A:%.*]] = mul i8 %A, 3
147 ; CHECK-NEXT: [[B1:%.*]] = lshr i8 [[A]], 3
148 ; CHECK-NEXT: [[C:%.*]] = shl i8 [[B1]], 4
149 ; CHECK-NEXT: ret i8 [[C]]
157 define i8 @test13a(i8 %A) {
158 ; CHECK-LABEL: @test13a(
159 ; CHECK-NEXT: [[C:%.*]] = mul i8 %A, 6
160 ; CHECK-NEXT: ret i8 [[C]]
163 %B = ashr exact i8 %a, 3
168 ;; D = ((B | 1234) << 4) === ((B << 4)|(1234 << 4)
169 define i32 @test14(i32 %A) {
170 ; CHECK-LABEL: @test14(
171 ; CHECK-NEXT: [[B:%.*]] = and i32 %A, -19760
172 ; CHECK-NEXT: [[C:%.*]] = or i32 [[B]], 19744
173 ; CHECK-NEXT: ret i32 [[C]]
181 ;; D = ((B | 1234) << 4) === ((B << 4)|(1234 << 4)
182 define i32 @test14a(i32 %A) {
183 ; CHECK-LABEL: @test14a(
184 ; CHECK-NEXT: [[C:%.*]] = and i32 %A, 77
185 ; CHECK-NEXT: ret i32 [[C]]
188 %C = and i32 %B, 1234
193 define i32 @test15(i1 %C) {
194 ; CHECK-LABEL: @test15(
195 ; CHECK-NEXT: [[A:%.*]] = select i1 %C, i32 12, i32 4
196 ; CHECK-NEXT: ret i32 [[A]]
198 %A = select i1 %C, i32 3, i32 1
203 define i32 @test15a(i1 %C) {
204 ; CHECK-LABEL: @test15a(
205 ; CHECK-NEXT: [[V:%.*]] = select i1 %C, i32 512, i32 128
206 ; CHECK-NEXT: ret i32 [[V]]
208 %A = select i1 %C, i8 3, i8 1
209 %shift.upgrd.4 = zext i8 %A to i32
210 %V = shl i32 64, %shift.upgrd.4
214 define i1 @test16(i32 %X) {
215 ; CHECK-LABEL: @test16(
216 ; CHECK-NEXT: [[TMP_6:%.*]] = and i32 %X, 16
217 ; CHECK-NEXT: [[TMP_7:%.*]] = icmp ne i32 [[TMP_6]], 0
218 ; CHECK-NEXT: ret i1 [[TMP_7]]
220 %tmp.3 = ashr i32 %X, 4
221 %tmp.6 = and i32 %tmp.3, 1
222 %tmp.7 = icmp ne i32 %tmp.6, 0
226 define i1 @test17(i32 %A) {
227 ; CHECK-LABEL: @test17(
228 ; CHECK-NEXT: [[B_MASK:%.*]] = and i32 %A, -8
229 ; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[B_MASK]], 9872
230 ; CHECK-NEXT: ret i1 [[C]]
233 %C = icmp eq i32 %B, 1234
237 define <2 x i1> @test17vec(<2 x i32> %A) {
238 ; CHECK-LABEL: @test17vec(
239 ; CHECK-NEXT: [[B_MASK:%.*]] = and <2 x i32> %A, <i32 -8, i32 -8>
240 ; CHECK-NEXT: [[C:%.*]] = icmp eq <2 x i32> [[B_MASK]], <i32 9872, i32 9872>
241 ; CHECK-NEXT: ret <2 x i1> [[C]]
243 %B = lshr <2 x i32> %A, <i32 3, i32 3>
244 %C = icmp eq <2 x i32> %B, <i32 1234, i32 1234>
248 define i1 @test18(i8 %A) {
249 ; CHECK-LABEL: @test18(
250 ; CHECK-NEXT: ret i1 false
254 %C = icmp eq i8 %B, 123
258 define i1 @test19(i32 %A) {
259 ; CHECK-LABEL: @test19(
260 ; CHECK-NEXT: [[C:%.*]] = icmp ult i32 %A, 4
261 ; CHECK-NEXT: ret i1 [[C]]
265 %C = icmp eq i32 %B, 0
269 define <2 x i1> @test19vec(<2 x i32> %A) {
270 ; CHECK-LABEL: @test19vec(
271 ; CHECK-NEXT: [[C:%.*]] = icmp ult <2 x i32> %A, <i32 4, i32 4>
272 ; CHECK-NEXT: ret <2 x i1> [[C]]
274 %B = ashr <2 x i32> %A, <i32 2, i32 2>
275 %C = icmp eq <2 x i32> %B, zeroinitializer
280 define i1 @test19a(i32 %A) {
281 ; CHECK-LABEL: @test19a(
282 ; CHECK-NEXT: [[C:%.*]] = icmp ugt i32 %A, -5
283 ; CHECK-NEXT: ret i1 [[C]]
286 %C = icmp eq i32 %B, -1
290 define <2 x i1> @test19a_vec(<2 x i32> %A) {
291 ; CHECK-LABEL: @test19a_vec(
292 ; CHECK-NEXT: [[C:%.*]] = icmp ugt <2 x i32> %A, <i32 -5, i32 -5>
293 ; CHECK-NEXT: ret <2 x i1> [[C]]
295 %B = ashr <2 x i32> %A, <i32 2, i32 2>
296 %C = icmp eq <2 x i32> %B, <i32 -1, i32 -1>
300 define i1 @test20(i8 %A) {
301 ; CHECK-LABEL: @test20(
302 ; CHECK-NEXT: ret i1 false
306 %C = icmp eq i8 %B, 123
310 define i1 @test21(i8 %A) {
311 ; CHECK-LABEL: @test21(
312 ; CHECK-NEXT: [[B_MASK:%.*]] = and i8 %A, 15
313 ; CHECK-NEXT: [[C:%.*]] = icmp eq i8 [[B_MASK]], 8
314 ; CHECK-NEXT: ret i1 [[C]]
317 %C = icmp eq i8 %B, -128
321 define i1 @test22(i8 %A) {
322 ; CHECK-LABEL: @test22(
323 ; CHECK-NEXT: [[B_MASK:%.*]] = and i8 %A, 15
324 ; CHECK-NEXT: [[C:%.*]] = icmp eq i8 [[B_MASK]], 0
325 ; CHECK-NEXT: ret i1 [[C]]
328 %C = icmp eq i8 %B, 0
332 define i8 @test23(i32 %A) {
333 ; CHECK-LABEL: @test23(
334 ; CHECK-NEXT: [[D:%.*]] = trunc i32 %A to i8
335 ; CHECK-NEXT: ret i8 [[D]]
340 %D = trunc i32 %C to i8
344 define i8 @test24(i8 %X) {
345 ; CHECK-LABEL: @test24(
346 ; CHECK-NEXT: [[Z:%.*]] = and i8 %X, 3
347 ; CHECK-NEXT: ret i8 [[Z]]
355 define i32 @test25(i32 %tmp.2, i32 %AA) {
356 ; CHECK-LABEL: @test25(
357 ; CHECK-NEXT: [[TMP_3:%.*]] = and i32 %tmp.2, -131072
358 ; CHECK-NEXT: [[X2:%.*]] = add i32 [[TMP_3]], %AA
359 ; CHECK-NEXT: [[TMP_6:%.*]] = and i32 [[X2]], -131072
360 ; CHECK-NEXT: ret i32 [[TMP_6]]
362 %x = lshr i32 %AA, 17
363 %tmp.3 = lshr i32 %tmp.2, 17
364 %tmp.5 = add i32 %tmp.3, %x
365 %tmp.6 = shl i32 %tmp.5, 17
369 define <2 x i32> @test25_vector(<2 x i32> %tmp.2, <2 x i32> %AA) {
370 ; CHECK-LABEL: @test25_vector(
371 ; CHECK-NEXT: [[TMP_3:%.*]] = and <2 x i32> %tmp.2, <i32 -131072, i32 -131072>
372 ; CHECK-NEXT: [[X2:%.*]] = add <2 x i32> [[TMP_3]], %AA
373 ; CHECK-NEXT: [[TMP_6:%.*]] = and <2 x i32> [[X2]], <i32 -131072, i32 -131072>
374 ; CHECK-NEXT: ret <2 x i32> [[TMP_6]]
376 %x = lshr <2 x i32> %AA, <i32 17, i32 17>
377 %tmp.3 = lshr <2 x i32> %tmp.2, <i32 17, i32 17>
378 %tmp.5 = add <2 x i32> %tmp.3, %x
379 %tmp.6 = shl <2 x i32> %tmp.5, <i32 17, i32 17>
383 ;; handle casts between shifts.
384 define i32 @test26(i32 %A) {
385 ; CHECK-LABEL: @test26(
386 ; CHECK-NEXT: [[B:%.*]] = and i32 %A, -2
387 ; CHECK-NEXT: ret i32 [[B]]
390 %C = bitcast i32 %B to i32
396 define i1 @test27(i32 %x) nounwind {
397 ; CHECK-LABEL: @test27(
398 ; CHECK-NEXT: [[TMP1:%.*]] = and i32 %x, 8
399 ; CHECK-NEXT: [[Z:%.*]] = icmp ne i32 [[TMP1]], 0
400 ; CHECK-NEXT: ret i1 [[Z]]
403 %z = trunc i32 %y to i1
407 define i1 @test28(i8 %x) {
408 ; CHECK-LABEL: @test28(
409 ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 %x, 0
410 ; CHECK-NEXT: ret i1 [[CMP]]
413 %cmp = icmp ne i8 %shr, 0
417 define <2 x i1> @test28vec(<2 x i8> %x) {
418 ; CHECK-LABEL: @test28vec(
419 ; CHECK-NEXT: [[CMP:%.*]] = icmp slt <2 x i8> %x, zeroinitializer
420 ; CHECK-NEXT: ret <2 x i1> [[CMP]]
422 %shr = lshr <2 x i8> %x, <i8 7, i8 7>
423 %cmp = icmp ne <2 x i8> %shr, zeroinitializer
427 define i8 @test28a(i8 %x, i8 %y) {
428 ; CHECK-LABEL: @test28a(
430 ; CHECK-NEXT: [[TMP1:%.*]] = lshr i8 %x, 7
431 ; CHECK-NEXT: [[COND1:%.*]] = icmp eq i8 [[TMP1]], 0
432 ; CHECK-NEXT: br i1 [[COND1]], label %bb2, label %bb1
434 ; CHECK-NEXT: ret i8 [[TMP1]]
436 ; CHECK-NEXT: [[TMP2:%.*]] = add i8 [[TMP1]], %y
437 ; CHECK-NEXT: ret i8 [[TMP2]]
440 ; This shouldn't be transformed.
441 %tmp1 = lshr i8 %x, 7
442 %cond1 = icmp ne i8 %tmp1, 0
443 br i1 %cond1, label %bb1, label %bb2
447 %tmp2 = add i8 %tmp1, %y
452 define i32 @test29(i64 %d18) {
453 ; CHECK-LABEL: @test29(
455 ; CHECK-NEXT: [[TMP916:%.*]] = lshr i64 %d18, 63
456 ; CHECK-NEXT: [[TMP10:%.*]] = trunc i64 [[TMP916]] to i32
457 ; CHECK-NEXT: ret i32 [[TMP10]]
460 %tmp916 = lshr i64 %d18, 32
461 %tmp917 = trunc i64 %tmp916 to i32
462 %tmp10 = lshr i32 %tmp917, 31
467 define i32 @test30(i32 %A, i32 %B, i32 %C) {
468 ; CHECK-LABEL: @test30(
469 ; CHECK-NEXT: [[X1:%.*]] = and i32 %A, %B
470 ; CHECK-NEXT: [[Z:%.*]] = shl i32 [[X1]], %C
471 ; CHECK-NEXT: ret i32 [[Z]]
479 define i32 @test31(i32 %A, i32 %B, i32 %C) {
480 ; CHECK-LABEL: @test31(
481 ; CHECK-NEXT: [[X1:%.*]] = or i32 %A, %B
482 ; CHECK-NEXT: [[Z:%.*]] = lshr i32 [[X1]], %C
483 ; CHECK-NEXT: ret i32 [[Z]]
491 define i32 @test32(i32 %A, i32 %B, i32 %C) {
492 ; CHECK-LABEL: @test32(
493 ; CHECK-NEXT: [[X1:%.*]] = xor i32 %A, %B
494 ; CHECK-NEXT: [[Z:%.*]] = ashr i32 [[X1]], %C
495 ; CHECK-NEXT: ret i32 [[Z]]
503 define i1 @test33(i32 %X) {
504 ; CHECK-LABEL: @test33(
505 ; CHECK-NEXT: [[TMP1_MASK:%.*]] = and i32 %X, 16777216
506 ; CHECK-NEXT: [[TMP2:%.*]] = icmp ne i32 [[TMP1_MASK]], 0
507 ; CHECK-NEXT: ret i1 [[TMP2]]
509 %tmp1 = shl i32 %X, 7
510 %tmp2 = icmp slt i32 %tmp1, 0
514 define <2 x i1> @test33vec(<2 x i32> %X) {
515 ; CHECK-LABEL: @test33vec(
516 ; CHECK-NEXT: [[TMP1_MASK:%.*]] = and <2 x i32> %X, <i32 16777216, i32 16777216>
517 ; CHECK-NEXT: [[TMP2:%.*]] = icmp ne <2 x i32> [[TMP1_MASK]], zeroinitializer
518 ; CHECK-NEXT: ret <2 x i1> [[TMP2]]
520 %tmp1 = shl <2 x i32> %X, <i32 7, i32 7>
521 %tmp2 = icmp slt <2 x i32> %tmp1, zeroinitializer
525 define i1 @test34(i32 %X) {
526 ; CHECK-LABEL: @test34(
527 ; CHECK-NEXT: ret i1 false
529 %tmp1 = lshr i32 %X, 7
530 %tmp2 = icmp slt i32 %tmp1, 0
534 define i1 @test35(i32 %X) {
535 ; CHECK-LABEL: @test35(
536 ; CHECK-NEXT: [[TMP2:%.*]] = icmp slt i32 %X, 0
537 ; CHECK-NEXT: ret i1 [[TMP2]]
539 %tmp1 = ashr i32 %X, 7
540 %tmp2 = icmp slt i32 %tmp1, 0
544 define <2 x i1> @test35vec(<2 x i32> %X) {
545 ; CHECK-LABEL: @test35vec(
546 ; CHECK-NEXT: [[TMP2:%.*]] = icmp slt <2 x i32> %X, zeroinitializer
547 ; CHECK-NEXT: ret <2 x i1> [[TMP2]]
549 %tmp1 = ashr <2 x i32> %X, <i32 7, i32 7>
550 %tmp2 = icmp slt <2 x i32> %tmp1, zeroinitializer
554 define i128 @test36(i128 %A, i128 %B) {
555 ; CHECK-LABEL: @test36(
556 ; CHECK-NEXT: [[TMP231:%.*]] = or i128 %B, %A
557 ; CHECK-NEXT: [[INS:%.*]] = and i128 [[TMP231]], 18446744073709551615
558 ; CHECK-NEXT: ret i128 [[INS]]
560 %tmp27 = shl i128 %A, 64
561 %tmp23 = shl i128 %B, 64
562 %ins = or i128 %tmp23, %tmp27
563 %tmp45 = lshr i128 %ins, 64
567 define i64 @test37(i128 %A, i32 %B) {
568 ; CHECK-LABEL: @test37(
569 ; CHECK-NEXT: [[TMP22:%.*]] = zext i32 %B to i128
570 ; CHECK-NEXT: [[TMP23:%.*]] = shl nuw nsw i128 [[TMP22]], 32
571 ; CHECK-NEXT: [[INS:%.*]] = or i128 [[TMP23]], %A
572 ; CHECK-NEXT: [[TMP46:%.*]] = trunc i128 [[INS]] to i64
573 ; CHECK-NEXT: ret i64 [[TMP46]]
575 %tmp27 = shl i128 %A, 64
576 %tmp22 = zext i32 %B to i128
577 %tmp23 = shl i128 %tmp22, 96
578 %ins = or i128 %tmp23, %tmp27
579 %tmp45 = lshr i128 %ins, 64
580 %tmp46 = trunc i128 %tmp45 to i64
584 define <2 x i32> @shl_nuw_nsw_splat_vec(<2 x i8> %x) {
585 ; CHECK-LABEL: @shl_nuw_nsw_splat_vec(
586 ; CHECK-NEXT: [[T2:%.*]] = zext <2 x i8> %x to <2 x i32>
587 ; CHECK-NEXT: [[T3:%.*]] = shl nuw nsw <2 x i32> [[T2]], <i32 17, i32 17>
588 ; CHECK-NEXT: ret <2 x i32> [[T3]]
590 %t2 = zext <2 x i8> %x to <2 x i32>
591 %t3 = shl <2 x i32> %t2, <i32 17, i32 17>
595 define i32 @test38(i32 %x) nounwind readnone {
596 ; CHECK-LABEL: @test38(
597 ; CHECK-NEXT: [[REM1:%.*]] = and i32 %x, 31
598 ; CHECK-NEXT: [[SHL:%.*]] = shl i32 1, [[REM1]]
599 ; CHECK-NEXT: ret i32 [[SHL]]
601 %rem = srem i32 %x, 32
602 %shl = shl i32 1, %rem
606 ; <rdar://problem/8756731>
607 define i8 @test39(i32 %a0) {
608 ; CHECK-LABEL: @test39(
610 ; CHECK-NEXT: [[TMP4:%.*]] = trunc i32 %a0 to i8
611 ; CHECK-NEXT: [[TMP5:%.*]] = shl i8 [[TMP4]], 5
612 ; CHECK-NEXT: [[TMP49:%.*]] = shl i8 [[TMP4]], 6
613 ; CHECK-NEXT: [[TMP50:%.*]] = and i8 [[TMP49]], 64
614 ; CHECK-NEXT: [[TMP51:%.*]] = xor i8 [[TMP50]], [[TMP5]]
615 ; CHECK-NEXT: [[TMP0:%.*]] = shl i8 [[TMP4]], 2
616 ; CHECK-NEXT: [[TMP54:%.*]] = and i8 [[TMP0]], 16
617 ; CHECK-NEXT: [[TMP551:%.*]] = or i8 [[TMP54]], [[TMP51]]
618 ; CHECK-NEXT: ret i8 [[TMP551]]
621 %tmp4 = trunc i32 %a0 to i8
622 %tmp5 = shl i8 %tmp4, 5
623 %tmp48 = and i8 %tmp5, 32
624 %tmp49 = lshr i8 %tmp48, 5
625 %tmp50 = mul i8 %tmp49, 64
626 %tmp51 = xor i8 %tmp50, %tmp5
627 %tmp52 = and i8 %tmp51, -128
628 %tmp53 = lshr i8 %tmp52, 7
629 %tmp54 = mul i8 %tmp53, 16
630 %tmp55 = xor i8 %tmp54, %tmp51
635 define i32 @test40(i32 %a, i32 %b) nounwind {
636 ; CHECK-LABEL: @test40(
637 ; CHECK-NEXT: [[TMP1:%.*]] = add i32 %b, 2
638 ; CHECK-NEXT: [[DIV:%.*]] = lshr i32 %a, [[TMP1]]
639 ; CHECK-NEXT: ret i32 [[DIV]]
641 %shl1 = shl i32 1, %b
642 %shl2 = shl i32 %shl1, 2
643 %div = udiv i32 %a, %shl2
647 define i32 @test41(i32 %a, i32 %b) nounwind {
648 ; CHECK-LABEL: @test41(
649 ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 8, %b
650 ; CHECK-NEXT: ret i32 [[TMP1]]
657 define i32 @test42(i32 %a, i32 %b) nounwind {
658 ; CHECK-LABEL: @test42(
659 ; CHECK-NEXT: [[DIV:%.*]] = lshr exact i32 4096, %b
660 ; CHECK-NEXT: [[DIV2:%.*]] = udiv i32 %a, [[DIV]]
661 ; CHECK-NEXT: ret i32 [[DIV2]]
663 %div = lshr i32 4096, %b ; must be exact otherwise we'd divide by zero
664 %div2 = udiv i32 %a, %div
668 define <2 x i32> @test42vec(<2 x i32> %a, <2 x i32> %b) {
669 ; CHECK-LABEL: @test42vec(
670 ; CHECK-NEXT: [[DIV:%.*]] = lshr exact <2 x i32> <i32 4096, i32 4096>, %b
671 ; CHECK-NEXT: [[DIV2:%.*]] = udiv <2 x i32> %a, [[DIV]]
672 ; CHECK-NEXT: ret <2 x i32> [[DIV2]]
674 %div = lshr <2 x i32> <i32 4096, i32 4096>, %b ; must be exact otherwise we'd divide by zero
675 %div2 = udiv <2 x i32> %a, %div
679 define i32 @test43(i32 %a, i32 %b) nounwind {
680 ; CHECK-LABEL: @test43(
681 ; CHECK-NEXT: [[TMP1:%.*]] = add i32 %b, 12
682 ; CHECK-NEXT: [[DIV2:%.*]] = lshr i32 %a, [[TMP1]]
683 ; CHECK-NEXT: ret i32 [[DIV2]]
685 %div = shl i32 4096, %b ; must be exact otherwise we'd divide by zero
686 %div2 = udiv i32 %a, %div
690 define i32 @test44(i32 %a) nounwind {
691 ; CHECK-LABEL: @test44(
692 ; CHECK-NEXT: [[Y:%.*]] = shl i32 %a, 5
693 ; CHECK-NEXT: ret i32 [[Y]]
695 %y = shl nuw i32 %a, 1
700 define i32 @test45(i32 %a) nounwind {
701 ; CHECK-LABEL: @test45(
702 ; CHECK-NEXT: [[Y:%.*]] = lshr i32 %a, 5
703 ; CHECK-NEXT: ret i32 [[Y]]
705 %y = lshr exact i32 %a, 1
710 ; (X >>?exact C1) << C2 --> X >>?exact (C1-C2)
712 define i32 @test46(i32 %a) {
713 ; CHECK-LABEL: @test46(
714 ; CHECK-NEXT: [[Z:%.*]] = ashr exact i32 %a, 2
715 ; CHECK-NEXT: ret i32 [[Z]]
717 %y = ashr exact i32 %a, 3
722 ; (X >>?exact C1) << C2 --> X >>?exact (C1-C2)
724 define <2 x i32> @test46_splat_vec(<2 x i32> %a) {
725 ; CHECK-LABEL: @test46_splat_vec(
726 ; CHECK-NEXT: [[Z:%.*]] = ashr exact <2 x i32> %a, <i32 2, i32 2>
727 ; CHECK-NEXT: ret <2 x i32> [[Z]]
729 %y = ashr exact <2 x i32> %a, <i32 3, i32 3>
730 %z = shl <2 x i32> %y, <i32 1, i32 1>
734 ; (X >>?exact C1) << C2 --> X >>?exact (C1-C2)
736 define i8 @test47(i8 %a) {
737 ; CHECK-LABEL: @test47(
738 ; CHECK-NEXT: [[Z:%.*]] = lshr exact i8 %a, 2
739 ; CHECK-NEXT: ret i8 [[Z]]
741 %y = lshr exact i8 %a, 3
746 ; (X >>?exact C1) << C2 --> X >>?exact (C1-C2)
748 define <2 x i8> @test47_splat_vec(<2 x i8> %a) {
749 ; CHECK-LABEL: @test47_splat_vec(
750 ; CHECK-NEXT: [[Z:%.*]] = lshr exact <2 x i8> %a, <i8 2, i8 2>
751 ; CHECK-NEXT: ret <2 x i8> [[Z]]
753 %y = lshr exact <2 x i8> %a, <i8 3, i8 3>
754 %z = shl <2 x i8> %y, <i8 1, i8 1>
758 ; (X >>u,exact C1) << C2 --> X << (C2-C1) when C2 > C1
760 define i32 @test48(i32 %x) {
761 ; CHECK-LABEL: @test48(
762 ; CHECK-NEXT: [[B:%.*]] = shl i32 %x, 2
763 ; CHECK-NEXT: ret i32 [[B]]
765 %A = lshr exact i32 %x, 1
770 ; Verify that wrap flags are preserved from the original 'shl'.
772 define i32 @test48_nuw_nsw(i32 %x) {
773 ; CHECK-LABEL: @test48_nuw_nsw(
774 ; CHECK-NEXT: [[B:%.*]] = shl nuw nsw i32 %x, 2
775 ; CHECK-NEXT: ret i32 [[B]]
777 %A = lshr exact i32 %x, 1
778 %B = shl nuw nsw i32 %A, 3
782 ; (X >>u,exact C1) << C2 --> X << (C2-C1) when splatted C2 > C1
784 define <2 x i32> @test48_splat_vec(<2 x i32> %x) {
785 ; CHECK-LABEL: @test48_splat_vec(
786 ; CHECK-NEXT: [[B:%.*]] = shl nuw nsw <2 x i32> %x, <i32 2, i32 2>
787 ; CHECK-NEXT: ret <2 x i32> [[B]]
789 %A = lshr exact <2 x i32> %x, <i32 1, i32 1>
790 %B = shl nsw nuw <2 x i32> %A, <i32 3, i32 3>
794 ; (X >>s,exact C1) << C2 --> X << (C2-C1) when C2 > C1
796 define i32 @test49(i32 %x) {
797 ; CHECK-LABEL: @test49(
798 ; CHECK-NEXT: [[B:%.*]] = shl i32 %x, 2
799 ; CHECK-NEXT: ret i32 [[B]]
801 %A = ashr exact i32 %x, 1
806 ; Verify that wrap flags are preserved from the original 'shl'.
808 define i32 @test49_nuw_nsw(i32 %x) {
809 ; CHECK-LABEL: @test49_nuw_nsw(
810 ; CHECK-NEXT: [[B:%.*]] = shl nuw nsw i32 %x, 2
811 ; CHECK-NEXT: ret i32 [[B]]
813 %A = ashr exact i32 %x, 1
814 %B = shl nuw nsw i32 %A, 3
818 ; (X >>s,exact C1) << C2 --> X << (C2-C1) when splatted C2 > C1
820 define <2 x i32> @test49_splat_vec(<2 x i32> %x) {
821 ; CHECK-LABEL: @test49_splat_vec(
822 ; CHECK-NEXT: [[B:%.*]] = shl nuw nsw <2 x i32> %x, <i32 2, i32 2>
823 ; CHECK-NEXT: ret <2 x i32> [[B]]
825 %A = ashr exact <2 x i32> %x, <i32 1, i32 1>
826 %B = shl nsw nuw <2 x i32> %A, <i32 3, i32 3>
830 ; (X <<nsw C1) >>s C2 --> X >>s (C2-C1)
832 define i32 @test50(i32 %x) {
833 ; CHECK-LABEL: @test50(
834 ; CHECK-NEXT: [[B:%.*]] = ashr i32 %x, 2
835 ; CHECK-NEXT: ret i32 [[B]]
837 %A = shl nsw i32 %x, 1
842 ; (X <<nsw C1) >>s C2 --> X >>s (C2-C1)
843 ; Also, check that exact is propagated.
845 define <2 x i32> @test50_splat_vec(<2 x i32> %x) {
846 ; CHECK-LABEL: @test50_splat_vec(
847 ; CHECK-NEXT: [[B:%.*]] = ashr exact <2 x i32> %x, <i32 2, i32 2>
848 ; CHECK-NEXT: ret <2 x i32> [[B]]
850 %A = shl nsw <2 x i32> %x, <i32 1, i32 1>
851 %B = ashr exact <2 x i32> %A, <i32 3, i32 3>
855 ; (X <<nuw C1) >>u C2 --> X >>u (C2-C1)
857 define i32 @test51(i32 %x) {
858 ; CHECK-LABEL: @test51(
859 ; CHECK-NEXT: [[B:%.*]] = lshr i32 %x, 2
860 ; CHECK-NEXT: ret i32 [[B]]
862 %A = shl nuw i32 %x, 1
867 ; (X <<nuw C1) >>u C2 --> X >>u (C2-C1) with splats
868 ; Also, check that exact is propagated.
870 define <2 x i32> @test51_splat_vec(<2 x i32> %x) {
871 ; CHECK-LABEL: @test51_splat_vec(
872 ; CHECK-NEXT: [[B:%.*]] = lshr exact <2 x i32> %x, <i32 2, i32 2>
873 ; CHECK-NEXT: ret <2 x i32> [[B]]
875 %A = shl nuw <2 x i32> %x, <i32 1, i32 1>
876 %B = lshr exact <2 x i32> %A, <i32 3, i32 3>
880 ; (X << C1) >>u C2 --> X >>u (C2-C1) & (-1 >> C2)
881 ; Also, check that exact is propagated.
883 define i32 @test51_no_nuw(i32 %x) {
884 ; CHECK-LABEL: @test51_no_nuw(
885 ; CHECK-NEXT: [[TMP1:%.*]] = lshr exact i32 %x, 2
886 ; CHECK-NEXT: [[B:%.*]] = and i32 [[TMP1]], 536870911
887 ; CHECK-NEXT: ret i32 [[B]]
890 %B = lshr exact i32 %A, 3
894 ; (X << C1) >>u C2 --> X >>u (C2-C1) & (-1 >> C2)
896 define <2 x i32> @test51_no_nuw_splat_vec(<2 x i32> %x) {
897 ; CHECK-LABEL: @test51_no_nuw_splat_vec(
898 ; CHECK-NEXT: [[TMP1:%.*]] = lshr <2 x i32> %x, <i32 2, i32 2>
899 ; CHECK-NEXT: [[B:%.*]] = and <2 x i32> [[TMP1]], <i32 536870911, i32 536870911>
900 ; CHECK-NEXT: ret <2 x i32> [[B]]
902 %A = shl <2 x i32> %x, <i32 1, i32 1>
903 %B = lshr <2 x i32> %A, <i32 3, i32 3>
907 ; (X <<nsw C1) >>s C2 --> X <<nsw (C1 - C2)
909 define i32 @test52(i32 %x) {
910 ; CHECK-LABEL: @test52(
911 ; CHECK-NEXT: [[B:%.*]] = shl nsw i32 %x, 2
912 ; CHECK-NEXT: ret i32 [[B]]
914 %A = shl nsw i32 %x, 3
919 ; (X <<nsw C1) >>s C2 --> X <<nsw (C1 - C2)
921 define <2 x i32> @test52_splat_vec(<2 x i32> %x) {
922 ; CHECK-LABEL: @test52_splat_vec(
923 ; CHECK-NEXT: [[B:%.*]] = shl nsw <2 x i32> %x, <i32 2, i32 2>
924 ; CHECK-NEXT: ret <2 x i32> [[B]]
926 %A = shl nsw <2 x i32> %x, <i32 3, i32 3>
927 %B = ashr <2 x i32> %A, <i32 1, i32 1>
931 ; (X <<nuw C1) >>u C2 --> X <<nuw (C1 - C2)
933 define i32 @test53(i32 %x) {
934 ; CHECK-LABEL: @test53(
935 ; CHECK-NEXT: [[B:%.*]] = shl nuw i32 %x, 2
936 ; CHECK-NEXT: ret i32 [[B]]
938 %A = shl nuw i32 %x, 3
943 ; (X <<nuw C1) >>u C2 --> X <<nuw (C1 - C2)
945 define <2 x i32> @test53_splat_vec(<2 x i32> %x) {
946 ; CHECK-LABEL: @test53_splat_vec(
947 ; CHECK-NEXT: [[B:%.*]] = shl nuw <2 x i32> %x, <i32 2, i32 2>
948 ; CHECK-NEXT: ret <2 x i32> [[B]]
950 %A = shl nuw <2 x i32> %x, <i32 3, i32 3>
951 %B = lshr <2 x i32> %A, <i32 1, i32 1>
955 ; (X << C1) >>u C2 --> X << (C1 - C2) & (-1 >> C2)
957 define i8 @test53_no_nuw(i8 %x) {
958 ; CHECK-LABEL: @test53_no_nuw(
959 ; CHECK-NEXT: [[TMP1:%.*]] = shl i8 %x, 2
960 ; CHECK-NEXT: [[B:%.*]] = and i8 [[TMP1]], 124
961 ; CHECK-NEXT: ret i8 [[B]]
968 ; (X << C1) >>u C2 --> X << (C1 - C2) & (-1 >> C2)
970 define <2 x i8> @test53_no_nuw_splat_vec(<2 x i8> %x) {
971 ; CHECK-LABEL: @test53_no_nuw_splat_vec(
972 ; CHECK-NEXT: [[TMP1:%.*]] = shl <2 x i8> %x, <i8 2, i8 2>
973 ; CHECK-NEXT: [[B:%.*]] = and <2 x i8> [[TMP1]], <i8 124, i8 124>
974 ; CHECK-NEXT: ret <2 x i8> [[B]]
976 %A = shl <2 x i8> %x, <i8 3, i8 3>
977 %B = lshr <2 x i8> %A, <i8 1, i8 1>
981 define i32 @test54(i32 %x) {
982 ; CHECK-LABEL: @test54(
983 ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 %x, 3
984 ; CHECK-NEXT: [[AND:%.*]] = and i32 [[TMP1]], 16
985 ; CHECK-NEXT: ret i32 [[AND]]
987 %shr2 = lshr i32 %x, 1
988 %shl = shl i32 %shr2, 4
989 %and = and i32 %shl, 16
993 define <2 x i32> @test54_splat_vec(<2 x i32> %x) {
994 ; CHECK-LABEL: @test54_splat_vec(
995 ; CHECK-NEXT: [[TMP1:%.*]] = shl <2 x i32> %x, <i32 3, i32 3>
996 ; CHECK-NEXT: [[AND:%.*]] = and <2 x i32> [[TMP1]], <i32 16, i32 16>
997 ; CHECK-NEXT: ret <2 x i32> [[AND]]
999 %shr2 = lshr <2 x i32> %x, <i32 1, i32 1>
1000 %shl = shl <2 x i32> %shr2, <i32 4, i32 4>
1001 %and = and <2 x i32> %shl, <i32 16, i32 16>
1005 define i32 @test55(i32 %x) {
1006 ; CHECK-LABEL: @test55(
1007 ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 %x, 3
1008 ; CHECK-NEXT: [[OR:%.*]] = or i32 [[TMP1]], 8
1009 ; CHECK-NEXT: ret i32 [[OR]]
1011 %shr2 = lshr i32 %x, 1
1012 %shl = shl i32 %shr2, 4
1013 %or = or i32 %shl, 8
1017 define i32 @test56(i32 %x) {
1018 ; CHECK-LABEL: @test56(
1019 ; CHECK-NEXT: [[SHR2:%.*]] = lshr i32 %x, 1
1020 ; CHECK-NEXT: [[SHL:%.*]] = shl i32 [[SHR2]], 4
1021 ; CHECK-NEXT: [[OR:%.*]] = or i32 [[SHL]], 7
1022 ; CHECK-NEXT: ret i32 [[OR]]
1024 %shr2 = lshr i32 %x, 1
1025 %shl = shl i32 %shr2, 4
1026 %or = or i32 %shl, 7
1030 define i32 @test57(i32 %x) {
1031 ; CHECK-LABEL: @test57(
1032 ; CHECK-NEXT: [[SHR1:%.*]] = lshr i32 %x, 1
1033 ; CHECK-NEXT: [[SHL:%.*]] = shl i32 [[SHR1]], 4
1034 ; CHECK-NEXT: [[OR:%.*]] = or i32 [[SHL]], 7
1035 ; CHECK-NEXT: ret i32 [[OR]]
1037 %shr = ashr i32 %x, 1
1038 %shl = shl i32 %shr, 4
1039 %or = or i32 %shl, 7
1043 define i32 @test58(i32 %x) {
1044 ; CHECK-LABEL: @test58(
1045 ; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 %x, 3
1046 ; CHECK-NEXT: [[OR:%.*]] = or i32 [[TMP1]], 1
1047 ; CHECK-NEXT: ret i32 [[OR]]
1049 %shr = ashr i32 %x, 4
1050 %shl = shl i32 %shr, 1
1051 %or = or i32 %shl, 1
1055 define <2 x i32> @test58_splat_vec(<2 x i32> %x) {
1056 ; CHECK-LABEL: @test58_splat_vec(
1057 ; CHECK-NEXT: [[TMP1:%.*]] = ashr <2 x i32> %x, <i32 3, i32 3>
1058 ; CHECK-NEXT: [[OR:%.*]] = or <2 x i32> [[TMP1]], <i32 1, i32 1>
1059 ; CHECK-NEXT: ret <2 x i32> [[OR]]
1061 %shr = ashr <2 x i32> %x, <i32 4, i32 4>
1062 %shl = shl <2 x i32> %shr, <i32 1, i32 1>
1063 %or = or <2 x i32> %shl, <i32 1, i32 1>
1067 define i32 @test59(i32 %x) {
1068 ; CHECK-LABEL: @test59(
1069 ; CHECK-NEXT: [[SHR:%.*]] = ashr i32 %x, 4
1070 ; CHECK-NEXT: [[SHL:%.*]] = shl nsw i32 [[SHR]], 1
1071 ; CHECK-NEXT: [[OR:%.*]] = or i32 [[SHL]], 2
1072 ; CHECK-NEXT: ret i32 [[OR]]
1074 %shr = ashr i32 %x, 4
1075 %shl = shl i32 %shr, 1
1076 %or = or i32 %shl, 2
1080 ; propagate "exact" trait
1081 define i32 @test60(i32 %x) {
1082 ; CHECK-LABEL: @test60(
1083 ; CHECK-NEXT: [[SHL:%.*]] = ashr exact i32 %x, 3
1084 ; CHECK-NEXT: [[OR:%.*]] = or i32 [[SHL]], 1
1085 ; CHECK-NEXT: ret i32 [[OR]]
1087 %shr = ashr exact i32 %x, 4
1088 %shl = shl i32 %shr, 1
1089 %or = or i32 %shl, 1
1094 define void @test61(i128 %arg) {
1095 ; CHECK-LABEL: @test61(
1097 ; CHECK-NEXT: br i1 undef, label %bb1, label %bb12
1099 ; CHECK-NEXT: br label %bb2
1101 ; CHECK-NEXT: br i1 undef, label %bb3, label %bb7
1103 ; CHECK-NEXT: br label %bb8
1105 ; CHECK-NEXT: br i1 undef, label %bb8, label %bb2
1107 ; CHECK-NEXT: br i1 undef, label %bb11, label %bb12
1109 ; CHECK-NEXT: br i1 undef, label %bb1, label %bb12
1111 ; CHECK-NEXT: ret void
1114 br i1 undef, label %bb1, label %bb12
1116 bb1: ; preds = %bb11, %bb
1119 bb2: ; preds = %bb7, %bb1
1120 br i1 undef, label %bb3, label %bb7
1123 %tmp = lshr i128 %arg, 36893488147419103232
1124 %tmp4 = shl i128 %tmp, 0
1125 %tmp5 = or i128 %tmp4, undef
1126 %tmp6 = trunc i128 %tmp5 to i16
1130 br i1 undef, label %bb8, label %bb2
1132 bb8: ; preds = %bb7, %bb3
1133 %tmp9 = phi i16 [ %tmp6, %bb3 ], [ undef, %bb7 ]
1134 %tmp10 = icmp eq i16 %tmp9, 0
1135 br i1 %tmp10, label %bb11, label %bb12
1137 bb11: ; preds = %bb8
1138 br i1 undef, label %bb1, label %bb12
1140 bb12: ; preds = %bb11, %bb8, %bb
1144 define i32 @test62(i32 %a) {
1145 ; CHECK-LABEL: @test62(
1146 ; CHECK-NEXT: ret i32 undef
1148 %b = ashr i32 %a, 32 ; shift all bits out
1152 define <4 x i32> @test62_splat_vector(<4 x i32> %a) {
1153 ; CHECK-LABEL: @test62_splat_vector(
1154 ; CHECK-NEXT: ret <4 x i32> undef
1156 %b = ashr <4 x i32> %a, <i32 32, i32 32, i32 32, i32 32> ; shift all bits out
1160 define <4 x i32> @test62_non_splat_vector(<4 x i32> %a) {
1161 ; CHECK-LABEL: @test62_non_splat_vector(
1162 ; CHECK-NEXT: [[B:%.*]] = ashr <4 x i32> %a, <i32 32, i32 0, i32 1, i32 2>
1163 ; CHECK-NEXT: ret <4 x i32> [[B]]
1165 %b = ashr <4 x i32> %a, <i32 32, i32 0, i32 1, i32 2> ; shift all bits out
1169 define <2 x i65> @test_63(<2 x i64> %t) {
1170 ; CHECK-LABEL: @test_63(
1171 ; CHECK-NEXT: [[A:%.*]] = zext <2 x i64> %t to <2 x i65>
1172 ; CHECK-NEXT: [[SEXT:%.*]] = shl <2 x i65> [[A]], <i65 33, i65 33>
1173 ; CHECK-NEXT: [[B:%.*]] = ashr exact <2 x i65> [[SEXT]], <i65 33, i65 33>
1174 ; CHECK-NEXT: ret <2 x i65> [[B]]
1176 %a = zext <2 x i64> %t to <2 x i65>
1177 %sext = shl <2 x i65> %a, <i65 33, i65 33>
1178 %b = ashr <2 x i65> %sext, <i65 33, i65 33>
1182 define i64 @test_64(i32 %t) {
1183 ; CHECK-LABEL: @test_64(
1184 ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 %t, 8
1185 ; CHECK-NEXT: [[SHL:%.*]] = zext i32 [[TMP1]] to i64
1186 ; CHECK-NEXT: ret i64 [[SHL]]
1188 %and = and i32 %t, 16777215
1189 %ext = zext i32 %and to i64
1190 %shl = shl i64 %ext, 8
1194 define <2 x i64> @test_64_splat_vec(<2 x i32> %t) {
1195 ; CHECK-LABEL: @test_64_splat_vec(
1196 ; CHECK-NEXT: [[TMP1:%.*]] = shl <2 x i32> %t, <i32 8, i32 8>
1197 ; CHECK-NEXT: [[SHL:%.*]] = zext <2 x i32> [[TMP1]] to <2 x i64>
1198 ; CHECK-NEXT: ret <2 x i64> [[SHL]]
1200 %and = and <2 x i32> %t, <i32 16777215, i32 16777215>
1201 %ext = zext <2 x i32> %and to <2 x i64>
1202 %shl = shl <2 x i64> %ext, <i64 8, i64 8>
1206 define <2 x i8> @ashr_demanded_bits_splat(<2 x i8> %x) {
1207 ; CHECK-LABEL: @ashr_demanded_bits_splat(
1208 ; CHECK-NEXT: [[SHR:%.*]] = ashr <2 x i8> %x, <i8 7, i8 7>
1209 ; CHECK-NEXT: ret <2 x i8> [[SHR]]
1211 %and = and <2 x i8> %x, <i8 128, i8 128>
1212 %shr = ashr <2 x i8> %and, <i8 7, i8 7>
1216 define <2 x i8> @lshr_demanded_bits_splat(<2 x i8> %x) {
1217 ; CHECK-LABEL: @lshr_demanded_bits_splat(
1218 ; CHECK-NEXT: [[SHR:%.*]] = lshr <2 x i8> %x, <i8 7, i8 7>
1219 ; CHECK-NEXT: ret <2 x i8> [[SHR]]
1221 %and = and <2 x i8> %x, <i8 128, i8 128>
1222 %shr = lshr <2 x i8> %and, <i8 7, i8 7>
1226 ; Make sure known bits works correctly with non power of 2 bit widths.
1227 define i7 @test65(i7 %a, i7 %b) {
1228 ; CHECK-LABEL: @test65(
1229 ; CHECK-NEXT: ret i7 0
1231 %shiftamt = and i7 %b, 6 ; this ensures the shift amount is even and less than the bit width.
1232 %x = lshr i7 42, %shiftamt ; 42 has a zero in every even numbered bit and a one in every odd bit.
1233 %y = and i7 %x, 1 ; this extracts the lsb which should be 0 because we shifted an even number of bits and all even bits of the shift input are 0.
1237 define i32 @shl_select_add_true(i32 %x, i1 %cond) {
1238 ; CHECK-LABEL: @shl_select_add_true(
1239 ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X:%.*]], 1
1240 ; CHECK-NEXT: [[TMP2:%.*]] = add i32 [[TMP1]], 14
1241 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]]
1242 ; CHECK-NEXT: ret i32 [[TMP3]]
1245 %2 = select i1 %cond, i32 %1, i32 %x
1250 define i32 @shl_select_add_false(i32 %x, i1 %cond) {
1251 ; CHECK-LABEL: @shl_select_add_false(
1252 ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X:%.*]], 1
1253 ; CHECK-NEXT: [[TMP2:%.*]] = add i32 [[TMP1]], 14
1254 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP1]], i32 [[TMP2]]
1255 ; CHECK-NEXT: ret i32 [[TMP3]]
1258 %2 = select i1 %cond, i32 %x, i32 %1
1263 define i32 @shl_select_and_true(i32 %x, i1 %cond) {
1264 ; CHECK-LABEL: @shl_select_and_true(
1265 ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X:%.*]], 1
1266 ; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], 14
1267 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]]
1268 ; CHECK-NEXT: ret i32 [[TMP3]]
1271 %2 = select i1 %cond, i32 %1, i32 %x
1276 define i32 @shl_select_and_false(i32 %x, i1 %cond) {
1277 ; CHECK-LABEL: @shl_select_and_false(
1278 ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X:%.*]], 1
1279 ; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], 14
1280 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP1]], i32 [[TMP2]]
1281 ; CHECK-NEXT: ret i32 [[TMP3]]
1284 %2 = select i1 %cond, i32 %x, i32 %1
1289 define i32 @lshr_select_and_true(i32 %x, i1 %cond) {
1290 ; CHECK-LABEL: @lshr_select_and_true(
1291 ; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[X:%.*]], 1
1292 ; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], 3
1293 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]]
1294 ; CHECK-NEXT: ret i32 [[TMP3]]
1297 %2 = select i1 %cond, i32 %1, i32 %x
1302 define i32 @lshr_select_and_false(i32 %x, i1 %cond) {
1303 ; CHECK-LABEL: @lshr_select_and_false(
1304 ; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[X:%.*]], 1
1305 ; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], 3
1306 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP1]], i32 [[TMP2]]
1307 ; CHECK-NEXT: ret i32 [[TMP3]]
1310 %2 = select i1 %cond, i32 %x, i32 %1
1315 define i32 @ashr_select_and_true(i32 %x, i1 %cond) {
1316 ; CHECK-LABEL: @ashr_select_and_true(
1317 ; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 [[X:%.*]], 1
1318 ; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], -1073741821
1319 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]]
1320 ; CHECK-NEXT: ret i32 [[TMP3]]
1322 %1 = and i32 %x, 2147483655
1323 %2 = select i1 %cond, i32 %1, i32 %x
1328 define i32 @ashr_select_and_false(i32 %x, i1 %cond) {
1329 ; CHECK-LABEL: @ashr_select_and_false(
1330 ; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 [[X:%.*]], 1
1331 ; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], -1073741821
1332 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP1]], i32 [[TMP2]]
1333 ; CHECK-NEXT: ret i32 [[TMP3]]
1335 %1 = and i32 %x, 2147483655
1336 %2 = select i1 %cond, i32 %x, i32 %1
1341 define i32 @shl_select_or_true(i32 %x, i1 %cond) {
1342 ; CHECK-LABEL: @shl_select_or_true(
1343 ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X:%.*]], 1
1344 ; CHECK-NEXT: [[TMP2:%.*]] = or i32 [[TMP1]], 14
1345 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]]
1346 ; CHECK-NEXT: ret i32 [[TMP3]]
1349 %2 = select i1 %cond, i32 %1, i32 %x
1354 define i32 @shl_select_or_false(i32 %x, i1 %cond) {
1355 ; CHECK-LABEL: @shl_select_or_false(
1356 ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X:%.*]], 1
1357 ; CHECK-NEXT: [[TMP2:%.*]] = or i32 [[TMP1]], 14
1358 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP1]], i32 [[TMP2]]
1359 ; CHECK-NEXT: ret i32 [[TMP3]]
1362 %2 = select i1 %cond, i32 %x, i32 %1
1367 define i32 @lshr_select_or_true(i32 %x, i1 %cond) {
1368 ; CHECK-LABEL: @lshr_select_or_true(
1369 ; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[X:%.*]], 1
1370 ; CHECK-NEXT: [[TMP2:%.*]] = or i32 [[TMP1]], 3
1371 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]]
1372 ; CHECK-NEXT: ret i32 [[TMP3]]
1375 %2 = select i1 %cond, i32 %1, i32 %x
1380 define i32 @lshr_select_or_false(i32 %x, i1 %cond) {
1381 ; CHECK-LABEL: @lshr_select_or_false(
1382 ; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[X:%.*]], 1
1383 ; CHECK-NEXT: [[TMP2:%.*]] = or i32 [[TMP1]], 3
1384 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP1]], i32 [[TMP2]]
1385 ; CHECK-NEXT: ret i32 [[TMP3]]
1388 %2 = select i1 %cond, i32 %x, i32 %1
1393 define i32 @ashr_select_or_true(i32 %x, i1 %cond) {
1394 ; CHECK-LABEL: @ashr_select_or_true(
1395 ; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 [[X:%.*]], 1
1396 ; CHECK-NEXT: [[TMP2:%.*]] = or i32 [[TMP1]], 3
1397 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]]
1398 ; CHECK-NEXT: ret i32 [[TMP3]]
1401 %2 = select i1 %cond, i32 %1, i32 %x
1406 define i32 @ashr_select_or_false(i32 %x, i1 %cond) {
1407 ; CHECK-LABEL: @ashr_select_or_false(
1408 ; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 [[X:%.*]], 1
1409 ; CHECK-NEXT: [[TMP2:%.*]] = or i32 [[TMP1]], 3
1410 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP1]], i32 [[TMP2]]
1411 ; CHECK-NEXT: ret i32 [[TMP3]]
1414 %2 = select i1 %cond, i32 %x, i32 %1
1419 define i32 @shl_select_xor_true(i32 %x, i1 %cond) {
1420 ; CHECK-LABEL: @shl_select_xor_true(
1421 ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X:%.*]], 1
1422 ; CHECK-NEXT: [[TMP2:%.*]] = xor i32 [[TMP1]], 14
1423 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]]
1424 ; CHECK-NEXT: ret i32 [[TMP3]]
1427 %2 = select i1 %cond, i32 %1, i32 %x
1432 define i32 @shl_select_xor_false(i32 %x, i1 %cond) {
1433 ; CHECK-LABEL: @shl_select_xor_false(
1434 ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X:%.*]], 1
1435 ; CHECK-NEXT: [[TMP2:%.*]] = xor i32 [[TMP1]], 14
1436 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP1]], i32 [[TMP2]]
1437 ; CHECK-NEXT: ret i32 [[TMP3]]
1440 %2 = select i1 %cond, i32 %x, i32 %1
1445 define i32 @lshr_select_xor_true(i32 %x, i1 %cond) {
1446 ; CHECK-LABEL: @lshr_select_xor_true(
1447 ; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[X:%.*]], 1
1448 ; CHECK-NEXT: [[TMP2:%.*]] = xor i32 [[TMP1]], 3
1449 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]]
1450 ; CHECK-NEXT: ret i32 [[TMP3]]
1453 %2 = select i1 %cond, i32 %1, i32 %x
1458 define i32 @lshr_select_xor_false(i32 %x, i1 %cond) {
1459 ; CHECK-LABEL: @lshr_select_xor_false(
1460 ; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[X:%.*]], 1
1461 ; CHECK-NEXT: [[TMP2:%.*]] = xor i32 [[TMP1]], 3
1462 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP1]], i32 [[TMP2]]
1463 ; CHECK-NEXT: ret i32 [[TMP3]]
1466 %2 = select i1 %cond, i32 %x, i32 %1
1471 define i32 @ashr_select_xor_true(i32 %x, i1 %cond) {
1472 ; CHECK-LABEL: @ashr_select_xor_true(
1473 ; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 [[X:%.*]], 1
1474 ; CHECK-NEXT: [[TMP2:%.*]] = xor i32 [[TMP1]], 3
1475 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]]
1476 ; CHECK-NEXT: ret i32 [[TMP3]]
1479 %2 = select i1 %cond, i32 %1, i32 %x
1484 define i32 @ashr_select_xor_false(i32 %x, i1 %cond) {
1485 ; CHECK-LABEL: @ashr_select_xor_false(
1486 ; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 [[X:%.*]], 1
1487 ; CHECK-NEXT: [[TMP2:%.*]] = xor i32 [[TMP1]], 3
1488 ; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i32 [[TMP1]], i32 [[TMP2]]
1489 ; CHECK-NEXT: ret i32 [[TMP3]]
1492 %2 = select i1 %cond, i32 %x, i32 %1
1498 ; https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=4871
1499 define i177 @lshr_out_of_range(i177 %Y, i177** %A2) {
1500 ; CHECK-LABEL: @lshr_out_of_range(
1501 ; CHECK-NEXT: store i177** [[A2:%.*]], i177*** undef, align 8
1502 ; CHECK-NEXT: ret i177 0
1504 %B5 = udiv i177 %Y, -1
1505 %B4 = add i177 %B5, -1
1506 %B2 = add i177 %B4, -1
1507 %B6 = mul i177 %B5, %B2
1508 %B3 = add i177 %B2, %B2
1509 %B10 = sub i177 %B5, %B3
1510 %B12 = lshr i177 %Y, %B6
1511 %C8 = icmp ugt i177 %B12, %B4
1512 %G18 = getelementptr i177*, i177** %A2, i1 %C8
1513 store i177** %G18, i177*** undef
1514 %B1 = udiv i177 %B10, %B6
1519 ; https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5032
1520 define void @ashr_out_of_range(i177* %A) {
1521 ; CHECK-LABEL: @ashr_out_of_range(
1522 ; CHECK-NEXT: ret void
1524 %L = load i177, i177* %A
1525 %B5 = udiv i177 %L, -1
1526 %B4 = add i177 %B5, -1
1527 %B2 = add i177 %B4, -1
1528 %G11 = getelementptr i177, i177* %A, i177 %B2
1529 %L7 = load i177, i177* %G11
1530 %B6 = mul i177 %B5, %B2
1531 %B24 = ashr i177 %L7, %B6
1532 %B36 = and i177 %L7, %B4
1533 %C17 = icmp sgt i177 %B36, %B24
1534 %G62 = getelementptr i177, i177* %G11, i1 %C17
1535 %B28 = urem i177 %B24, %B6
1536 store i177 %B28, i177* %G62