1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -passes=instcombine -S | FileCheck %s
7 declare i32 @llvm.ctlz.i32(i32, i1)
8 declare <2 x i8> @llvm.cttz.v2i8(<2 x i8>, i1)
11 define i1 @test0(i1 %A) {
12 ; CHECK-LABEL: @test0(
13 ; CHECK-NEXT: ret i1 [[A:%.*]]
19 define i32 @test1(i32 %A) {
20 ; CHECK-LABEL: @test1(
21 ; CHECK-NEXT: ret i32 [[A:%.*]]
27 define i1 @test2(i1 %A) {
28 ; CHECK-LABEL: @test2(
29 ; CHECK-NEXT: ret i1 false
35 define i32 @test3(i32 %A) {
36 ; CHECK-LABEL: @test3(
37 ; CHECK-NEXT: ret i32 0
43 define i32 @test4(i32 %A) {
44 ; CHECK-LABEL: @test4(
45 ; CHECK-NEXT: ret i32 -1
47 %NotA = xor i32 -1, %A
48 %B = xor i32 %A, %NotA
52 define i32 @test5(i32 %A) {
53 ; CHECK-LABEL: @test5(
54 ; CHECK-NEXT: [[R:%.*]] = and i32 [[A:%.*]], -124
55 ; CHECK-NEXT: ret i32 [[R]]
62 define i8 @test6(i8 %A) {
63 ; CHECK-LABEL: @test6(
64 ; CHECK-NEXT: ret i8 [[A:%.*]]
71 define i32 @test7(i32 %A, i32 %B) {
72 ; CHECK-LABEL: @test7(
73 ; CHECK-NEXT: [[A1:%.*]] = and i32 [[A:%.*]], 7
74 ; CHECK-NEXT: [[B1:%.*]] = and i32 [[B:%.*]], 128
75 ; CHECK-NEXT: [[C1:%.*]] = or disjoint i32 [[A1]], [[B1]]
76 ; CHECK-NEXT: ret i32 [[C1]]
80 %C1 = xor i32 %A1, %B1
84 define i8 @test8(i1 %c) {
85 ; CHECK-LABEL: @test8(
86 ; CHECK-NEXT: br i1 [[C:%.*]], label [[FALSE:%.*]], label [[TRUE:%.*]]
88 ; CHECK-NEXT: ret i8 1
90 ; CHECK-NEXT: ret i8 3
93 br i1 %d, label %True, label %False
102 define i1 @test9(i8 %A) {
103 ; CHECK-LABEL: @test9(
104 ; CHECK-NEXT: [[C:%.*]] = icmp eq i8 [[A:%.*]], 89
105 ; CHECK-NEXT: ret i1 [[C]]
108 %C = icmp eq i8 %B, 34
112 define <2 x i1> @test9vec(<2 x i8> %a) {
113 ; CHECK-LABEL: @test9vec(
114 ; CHECK-NEXT: [[C:%.*]] = icmp eq <2 x i8> [[A:%.*]], splat (i8 89)
115 ; CHECK-NEXT: ret <2 x i1> [[C]]
117 %b = xor <2 x i8> %a, <i8 123, i8 123>
118 %c = icmp eq <2 x i8> %b, <i8 34, i8 34>
122 define i8 @test10(i8 %A) {
123 ; CHECK-LABEL: @test10(
124 ; CHECK-NEXT: [[B:%.*]] = and i8 [[A:%.*]], 3
125 ; CHECK-NEXT: [[C:%.*]] = or disjoint i8 [[B]], 4
126 ; CHECK-NEXT: ret i8 [[C]]
133 define i8 @test11(i8 %A) {
134 ; CHECK-LABEL: @test11(
135 ; CHECK-NEXT: [[B:%.*]] = and i8 [[A:%.*]], -13
136 ; CHECK-NEXT: [[C:%.*]] = or disjoint i8 [[B]], 8
137 ; CHECK-NEXT: ret i8 [[C]]
144 define i1 @test12(i8 %A) {
145 ; CHECK-LABEL: @test12(
146 ; CHECK-NEXT: [[C:%.*]] = icmp ne i8 [[A:%.*]], 4
147 ; CHECK-NEXT: ret i1 [[C]]
150 %c = icmp ne i8 %B, 0
154 define <2 x i1> @test12vec(<2 x i8> %a) {
155 ; CHECK-LABEL: @test12vec(
156 ; CHECK-NEXT: [[C:%.*]] = icmp ne <2 x i8> [[A:%.*]], splat (i8 4)
157 ; CHECK-NEXT: ret <2 x i1> [[C]]
159 %b = xor <2 x i8> %a, <i8 4, i8 4>
160 %c = icmp ne <2 x i8> %b, zeroinitializer
164 define i32 @test18(i32 %A) {
165 ; CHECK-LABEL: @test18(
166 ; CHECK-NEXT: [[C:%.*]] = add i32 [[A:%.*]], 124
167 ; CHECK-NEXT: ret i32 [[C]]
174 define i32 @test19(i32 %A, i32 %B) {
175 ; CHECK-LABEL: @test19(
176 ; CHECK-NEXT: ret i32 [[B:%.*]]
183 define void @test20(i32 %A, i32 %B) {
184 ; CHECK-LABEL: @test20(
185 ; CHECK-NEXT: store i32 [[B:%.*]], ptr @G1, align 4
186 ; CHECK-NEXT: store i32 [[A:%.*]], ptr @G2, align 4
187 ; CHECK-NEXT: ret void
190 %t5 = xor i32 %t2, %B
191 %t8 = xor i32 %t5, %t2
192 store i32 %t8, ptr @G1
193 store i32 %t5, ptr @G2
197 define i32 @test22(i1 %X) {
198 ; CHECK-LABEL: @test22(
199 ; CHECK-NEXT: [[Z:%.*]] = zext i1 [[X:%.*]] to i32
200 ; CHECK-NEXT: ret i32 [[Z]]
203 %Z = zext i1 %Y to i32
208 ; Look through a zext between xors.
210 define i32 @fold_zext_xor_sandwich(i1 %X) {
211 ; CHECK-LABEL: @fold_zext_xor_sandwich(
212 ; CHECK-NEXT: [[Z:%.*]] = zext i1 [[X:%.*]] to i32
213 ; CHECK-NEXT: [[Q:%.*]] = xor i32 [[Z]], 3
214 ; CHECK-NEXT: ret i32 [[Q]]
217 %Z = zext i1 %Y to i32
222 define <2 x i32> @fold_zext_xor_sandwich_vec(<2 x i1> %X) {
223 ; CHECK-LABEL: @fold_zext_xor_sandwich_vec(
224 ; CHECK-NEXT: [[Z:%.*]] = zext <2 x i1> [[X:%.*]] to <2 x i32>
225 ; CHECK-NEXT: [[Q:%.*]] = xor <2 x i32> [[Z]], splat (i32 3)
226 ; CHECK-NEXT: ret <2 x i32> [[Q]]
228 %Y = xor <2 x i1> %X, <i1 true, i1 true>
229 %Z = zext <2 x i1> %Y to <2 x i32>
230 %Q = xor <2 x i32> %Z, <i32 2, i32 2>
234 define i1 @test23(i32 %a, i32 %b) {
235 ; CHECK-LABEL: @test23(
236 ; CHECK-NEXT: [[T4:%.*]] = icmp eq i32 [[B:%.*]], 0
237 ; CHECK-NEXT: ret i1 [[T4]]
240 %t4 = icmp eq i32 %t2, %a
244 define i1 @test24(i32 %c, i32 %d) {
245 ; CHECK-LABEL: @test24(
246 ; CHECK-NEXT: [[T4:%.*]] = icmp ne i32 [[D:%.*]], 0
247 ; CHECK-NEXT: ret i1 [[T4]]
250 %t4 = icmp ne i32 %t2, %c
254 define i32 @test25(i32 %g, i32 %h) {
255 ; CHECK-LABEL: @test25(
256 ; CHECK-NEXT: [[T4:%.*]] = and i32 [[G:%.*]], [[H:%.*]]
257 ; CHECK-NEXT: ret i32 [[T4]]
260 %t2 = and i32 %h2, %g
261 %t4 = xor i32 %t2, %g
265 define i32 @test27(i32 %b, i32 %c, i32 %d) {
266 ; CHECK-LABEL: @test27(
267 ; CHECK-NEXT: [[T6:%.*]] = icmp eq i32 [[B:%.*]], [[C:%.*]]
268 ; CHECK-NEXT: [[T7:%.*]] = zext i1 [[T6]] to i32
269 ; CHECK-NEXT: ret i32 [[T7]]
273 %t6 = icmp eq i32 %t2, %t5
274 %t7 = zext i1 %t6 to i32
278 define i32 @test28(i32 %indvar) {
279 ; CHECK-LABEL: @test28(
280 ; CHECK-NEXT: [[T214:%.*]] = add i32 [[INDVAR:%.*]], 1
281 ; CHECK-NEXT: ret i32 [[T214]]
283 %t7 = add i32 %indvar, -2147483647
284 %t214 = xor i32 %t7, -2147483648
288 define <2 x i32> @test28vec(<2 x i32> %indvar) {
289 ; CHECK-LABEL: @test28vec(
290 ; CHECK-NEXT: [[T214:%.*]] = add <2 x i32> [[INDVAR:%.*]], splat (i32 1)
291 ; CHECK-NEXT: ret <2 x i32> [[T214]]
293 %t7 = add <2 x i32> %indvar, <i32 -2147483647, i32 -2147483647>
294 %t214 = xor <2 x i32> %t7, <i32 -2147483648, i32 -2147483648>
298 define i32 @test28_sub(i32 %indvar) {
299 ; CHECK-LABEL: @test28_sub(
300 ; CHECK-NEXT: [[T214:%.*]] = sub i32 1, [[INDVAR:%.*]]
301 ; CHECK-NEXT: ret i32 [[T214]]
303 %t7 = sub i32 -2147483647, %indvar
304 %t214 = xor i32 %t7, -2147483648
308 define <2 x i32> @test28_subvec(<2 x i32> %indvar) {
309 ; CHECK-LABEL: @test28_subvec(
310 ; CHECK-NEXT: [[T214:%.*]] = sub <2 x i32> splat (i32 1), [[INDVAR:%.*]]
311 ; CHECK-NEXT: ret <2 x i32> [[T214]]
313 %t7 = sub <2 x i32> <i32 -2147483647, i32 -2147483647>, %indvar
314 %t214 = xor <2 x i32> %t7, <i32 -2147483648, i32 -2147483648>
318 define i32 @test29(i1 %C) {
319 ; CHECK-LABEL: @test29(
320 ; CHECK-NEXT: [[V:%.*]] = select i1 [[C:%.*]], i32 915, i32 113
321 ; CHECK-NEXT: ret i32 [[V]]
323 %A = select i1 %C, i32 1000, i32 10
328 define <2 x i32> @test29vec(i1 %C) {
329 ; CHECK-LABEL: @test29vec(
330 ; CHECK-NEXT: [[V:%.*]] = select i1 [[C:%.*]], <2 x i32> splat (i32 915), <2 x i32> splat (i32 113)
331 ; CHECK-NEXT: ret <2 x i32> [[V]]
333 %A = select i1 %C, <2 x i32> <i32 1000, i32 1000>, <2 x i32> <i32 10, i32 10>
334 %V = xor <2 x i32> %A, <i32 123, i32 123>
338 define <2 x i32> @test29vec2(i1 %C) {
339 ; CHECK-LABEL: @test29vec2(
340 ; CHECK-NEXT: [[V:%.*]] = select i1 [[C:%.*]], <2 x i32> <i32 915, i32 2185>, <2 x i32> <i32 113, i32 339>
341 ; CHECK-NEXT: ret <2 x i32> [[V]]
343 %A = select i1 %C, <2 x i32> <i32 1000, i32 2500>, <2 x i32> <i32 10, i32 30>
344 %V = xor <2 x i32> %A, <i32 123, i32 333>
348 define i32 @test30(i1 %which) {
349 ; CHECK-LABEL: @test30(
351 ; CHECK-NEXT: br i1 [[WHICH:%.*]], label [[FINAL:%.*]], label [[DELAY:%.*]]
353 ; CHECK-NEXT: br label [[FINAL]]
355 ; CHECK-NEXT: [[A:%.*]] = phi i32 [ 915, [[ENTRY:%.*]] ], [ 113, [[DELAY]] ]
356 ; CHECK-NEXT: ret i32 [[A]]
359 br i1 %which, label %final, label %delay
365 %A = phi i32 [ 1000, %entry ], [ 10, %delay ]
366 %value = xor i32 %A, 123
370 define <2 x i32> @test30vec(i1 %which) {
371 ; CHECK-LABEL: @test30vec(
373 ; CHECK-NEXT: br i1 [[WHICH:%.*]], label [[FINAL:%.*]], label [[DELAY:%.*]]
375 ; CHECK-NEXT: br label [[FINAL]]
377 ; CHECK-NEXT: [[A:%.*]] = phi <2 x i32> [ splat (i32 915), [[ENTRY:%.*]] ], [ splat (i32 113), [[DELAY]] ]
378 ; CHECK-NEXT: ret <2 x i32> [[A]]
381 br i1 %which, label %final, label %delay
387 %A = phi <2 x i32> [ <i32 1000, i32 1000>, %entry ], [ <i32 10, i32 10>, %delay ]
388 %value = xor <2 x i32> %A, <i32 123, i32 123>
392 define <2 x i32> @test30vec2(i1 %which) {
393 ; CHECK-LABEL: @test30vec2(
395 ; CHECK-NEXT: br i1 [[WHICH:%.*]], label [[FINAL:%.*]], label [[DELAY:%.*]]
397 ; CHECK-NEXT: br label [[FINAL]]
399 ; CHECK-NEXT: [[A:%.*]] = phi <2 x i32> [ <i32 915, i32 2185>, [[ENTRY:%.*]] ], [ <i32 113, i32 339>, [[DELAY]] ]
400 ; CHECK-NEXT: ret <2 x i32> [[A]]
403 br i1 %which, label %final, label %delay
409 %A = phi <2 x i32> [ <i32 1000, i32 2500>, %entry ], [ <i32 10, i32 30>, %delay ]
410 %value = xor <2 x i32> %A, <i32 123, i32 333>
414 ; B ^ (B | A) --> A & ~B
415 ; The division ops are here to thwart complexity-based canonicalization: all ops are binops.
417 define i32 @or_xor_commute1(i32 %p1, i32 %p2) {
418 ; CHECK-LABEL: @or_xor_commute1(
419 ; CHECK-NEXT: [[A:%.*]] = udiv i32 42, [[P1:%.*]]
420 ; CHECK-NEXT: [[B:%.*]] = udiv i32 42, [[P2:%.*]]
421 ; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[B]], -1
422 ; CHECK-NEXT: [[R:%.*]] = and i32 [[A]], [[TMP1]]
423 ; CHECK-NEXT: ret i32 [[R]]
425 %a = udiv i32 42, %p1
426 %b = udiv i32 42, %p2
432 ; B ^ (B | A) --> A & ~B
433 ; The division ops are here to thwart complexity-based canonicalization: all ops are binops.
435 define i32 @or_xor_commute2(i32 %p1, i32 %p2) {
436 ; CHECK-LABEL: @or_xor_commute2(
437 ; CHECK-NEXT: [[A:%.*]] = udiv i32 42, [[P1:%.*]]
438 ; CHECK-NEXT: [[B:%.*]] = udiv i32 42, [[P2:%.*]]
439 ; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[B]], -1
440 ; CHECK-NEXT: [[R:%.*]] = and i32 [[A]], [[TMP1]]
441 ; CHECK-NEXT: ret i32 [[R]]
443 %a = udiv i32 42, %p1
444 %b = udiv i32 42, %p2
450 ; B ^ (B | A) --> A & ~B
451 ; The division ops are here to thwart complexity-based canonicalization: all ops are binops.
453 define i32 @or_xor_commute3(i32 %p1, i32 %p2) {
454 ; CHECK-LABEL: @or_xor_commute3(
455 ; CHECK-NEXT: [[A:%.*]] = udiv i32 42, [[P1:%.*]]
456 ; CHECK-NEXT: [[B:%.*]] = udiv i32 42, [[P2:%.*]]
457 ; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[B]], -1
458 ; CHECK-NEXT: [[R:%.*]] = and i32 [[A]], [[TMP1]]
459 ; CHECK-NEXT: ret i32 [[R]]
461 %a = udiv i32 42, %p1
462 %b = udiv i32 42, %p2
468 ; B ^ (B | A) --> A & ~B
469 ; The division ops are here to thwart complexity-based canonicalization: all ops are binops.
471 define i32 @or_xor_commute4(i32 %p1, i32 %p2) {
472 ; CHECK-LABEL: @or_xor_commute4(
473 ; CHECK-NEXT: [[A:%.*]] = udiv i32 42, [[P1:%.*]]
474 ; CHECK-NEXT: [[B:%.*]] = udiv i32 42, [[P2:%.*]]
475 ; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[B]], -1
476 ; CHECK-NEXT: [[R:%.*]] = and i32 [[A]], [[TMP1]]
477 ; CHECK-NEXT: ret i32 [[R]]
479 %a = udiv i32 42, %p1
480 %b = udiv i32 42, %p2
486 define i32 @or_xor_extra_use(i32 %a, i32 %b, ptr %p) {
487 ; CHECK-LABEL: @or_xor_extra_use(
488 ; CHECK-NEXT: [[O:%.*]] = or i32 [[A:%.*]], [[B:%.*]]
489 ; CHECK-NEXT: store i32 [[O]], ptr [[P:%.*]], align 4
490 ; CHECK-NEXT: [[R:%.*]] = xor i32 [[B]], [[O]]
491 ; CHECK-NEXT: ret i32 [[R]]
499 ; B ^ (B & A) --> ~A & B
500 ; The division ops are here to thwart complexity-based canonicalization: all ops are binops.
502 define i32 @and_xor_commute1(i32 %p1, i32 %p2) {
503 ; CHECK-LABEL: @and_xor_commute1(
504 ; CHECK-NEXT: [[A:%.*]] = udiv i32 42, [[P1:%.*]]
505 ; CHECK-NEXT: [[B:%.*]] = udiv i32 42, [[P2:%.*]]
506 ; CHECK-NEXT: [[O1:%.*]] = xor i32 [[A]], -1
507 ; CHECK-NEXT: [[R:%.*]] = and i32 [[B]], [[O1]]
508 ; CHECK-NEXT: ret i32 [[R]]
510 %a = udiv i32 42, %p1
511 %b = udiv i32 42, %p2
517 ; B ^ (B & A) --> ~A & B
518 ; The division ops are here to thwart complexity-based canonicalization: all ops are binops.
520 define i32 @and_xor_commute2(i32 %p1, i32 %p2) {
521 ; CHECK-LABEL: @and_xor_commute2(
522 ; CHECK-NEXT: [[A:%.*]] = udiv i32 42, [[P1:%.*]]
523 ; CHECK-NEXT: [[B:%.*]] = udiv i32 42, [[P2:%.*]]
524 ; CHECK-NEXT: [[O1:%.*]] = xor i32 [[A]], -1
525 ; CHECK-NEXT: [[R:%.*]] = and i32 [[B]], [[O1]]
526 ; CHECK-NEXT: ret i32 [[R]]
528 %a = udiv i32 42, %p1
529 %b = udiv i32 42, %p2
535 ; B ^ (B & A) --> ~A & B
536 ; The division ops are here to thwart complexity-based canonicalization: all ops are binops.
538 define i32 @and_xor_commute3(i32 %p1, i32 %p2) {
539 ; CHECK-LABEL: @and_xor_commute3(
540 ; CHECK-NEXT: [[A:%.*]] = udiv i32 42, [[P1:%.*]]
541 ; CHECK-NEXT: [[B:%.*]] = udiv i32 42, [[P2:%.*]]
542 ; CHECK-NEXT: [[B1:%.*]] = xor i32 [[A]], -1
543 ; CHECK-NEXT: [[R:%.*]] = and i32 [[B]], [[B1]]
544 ; CHECK-NEXT: ret i32 [[R]]
546 %a = udiv i32 42, %p1
547 %b = udiv i32 42, %p2
553 ; B ^ (B & A) --> ~A & B
554 ; The division ops are here to thwart complexity-based canonicalization: all ops are binops.
556 define i32 @and_xor_commute4(i32 %p1, i32 %p2) {
557 ; CHECK-LABEL: @and_xor_commute4(
558 ; CHECK-NEXT: [[A:%.*]] = udiv i32 42, [[P1:%.*]]
559 ; CHECK-NEXT: [[B:%.*]] = udiv i32 42, [[P2:%.*]]
560 ; CHECK-NEXT: [[O1:%.*]] = xor i32 [[A]], -1
561 ; CHECK-NEXT: [[R:%.*]] = and i32 [[B]], [[O1]]
562 ; CHECK-NEXT: ret i32 [[R]]
564 %a = udiv i32 42, %p1
565 %b = udiv i32 42, %p2
571 define i32 @and_xor_extra_use(i32 %a, i32 %b, ptr %p) {
572 ; CHECK-LABEL: @and_xor_extra_use(
573 ; CHECK-NEXT: [[O:%.*]] = and i32 [[A:%.*]], [[B:%.*]]
574 ; CHECK-NEXT: store i32 [[O]], ptr [[P:%.*]], align 4
575 ; CHECK-NEXT: [[R:%.*]] = xor i32 [[B]], [[O]]
576 ; CHECK-NEXT: ret i32 [[R]]
584 ; (~X | C2) ^ C1 --> ((X & ~C2) ^ -1) ^ C1 --> (X & ~C2) ^ ~C1
585 ; The extra use (store) is here because the simpler case
586 ; may be transformed using demanded bits.
588 define i8 @xor_or_not(i8 %x, ptr %p) {
589 ; CHECK-LABEL: @xor_or_not(
590 ; CHECK-NEXT: [[NX:%.*]] = xor i8 [[X:%.*]], -1
591 ; CHECK-NEXT: store i8 [[NX]], ptr [[P:%.*]], align 1
592 ; CHECK-NEXT: [[TMP1:%.*]] = and i8 [[X]], -8
593 ; CHECK-NEXT: [[R:%.*]] = xor i8 [[TMP1]], -13
594 ; CHECK-NEXT: ret i8 [[R]]
603 ; Don't do this if the 'or' has extra uses.
605 define i8 @xor_or_not_uses(i8 %x, ptr %p) {
606 ; CHECK-LABEL: @xor_or_not_uses(
607 ; CHECK-NEXT: [[NX:%.*]] = xor i8 [[X:%.*]], -1
608 ; CHECK-NEXT: [[OR:%.*]] = or i8 [[NX]], 7
609 ; CHECK-NEXT: store i8 [[OR]], ptr [[P:%.*]], align 1
610 ; CHECK-NEXT: [[R:%.*]] = xor i8 [[OR]], 12
611 ; CHECK-NEXT: ret i8 [[R]]
620 ; (~X & C2) ^ C1 --> ((X | ~C2) ^ -1) ^ C1 --> (X | ~C2) ^ ~C1
621 ; The extra use (store) is here because the simpler case
622 ; may be transformed using demanded bits.
624 define i8 @xor_and_not(i8 %x, ptr %p) {
625 ; CHECK-LABEL: @xor_and_not(
626 ; CHECK-NEXT: [[NX:%.*]] = xor i8 [[X:%.*]], -1
627 ; CHECK-NEXT: store i8 [[NX]], ptr [[P:%.*]], align 1
628 ; CHECK-NEXT: [[TMP1:%.*]] = and i8 [[X]], 42
629 ; CHECK-NEXT: [[R:%.*]] = xor i8 [[TMP1]], 53
630 ; CHECK-NEXT: ret i8 [[R]]
634 %and = and i8 %nx, 42
639 ; Don't do this if the 'and' has extra uses.
641 define i8 @xor_and_not_uses(i8 %x, ptr %p) {
642 ; CHECK-LABEL: @xor_and_not_uses(
643 ; CHECK-NEXT: [[NX:%.*]] = and i8 [[X:%.*]], 42
644 ; CHECK-NEXT: [[AND:%.*]] = xor i8 [[NX]], 42
645 ; CHECK-NEXT: store i8 [[AND]], ptr [[P:%.*]], align 1
646 ; CHECK-NEXT: [[R:%.*]] = xor i8 [[NX]], 53
647 ; CHECK-NEXT: ret i8 [[R]]
650 %and = and i8 %nx, 42
651 store i8 %and, ptr %p
656 ; The tests 39-47 are related to the canonicalization:
657 ; %notx = xor i32 %x, -1
658 ; %cmp = icmp sgt i32 %notx, %y
659 ; %smax = select i1 %cmp, i32 %notx, i32 %y
660 ; %res = xor i32 %smax, -1
662 ; %noty = xor i32 %y, -1
663 ; %cmp2 = icmp slt %x, %noty
664 ; %res = select i1 %cmp2, i32 %x, i32 %noty
666 ; Same transformations is valid for smin/umax/umin.
668 define i32 @test39(i32 %x) {
669 ; CHECK-LABEL: @test39(
670 ; CHECK-NEXT: [[TMP1:%.*]] = call i32 @llvm.smin.i32(i32 [[X:%.*]], i32 255)
671 ; CHECK-NEXT: ret i32 [[TMP1]]
674 %2 = icmp sgt i32 %1, -256
675 %3 = select i1 %2, i32 %1, i32 -256
676 %res = xor i32 %3, -1
680 define i32 @test40(i32 %x, i32 %y) {
681 ; CHECK-LABEL: @test40(
682 ; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[Y:%.*]], -1
683 ; CHECK-NEXT: [[RES:%.*]] = call i32 @llvm.smin.i32(i32 [[X:%.*]], i32 [[TMP1]])
684 ; CHECK-NEXT: ret i32 [[RES]]
686 %notx = xor i32 %x, -1
687 %cmp1 = icmp sgt i32 %notx, %y
688 %smax = select i1 %cmp1, i32 %notx, i32 %y
689 %res = xor i32 %smax, -1
693 define i32 @test41(i32 %x, i32 %y) {
694 ; CHECK-LABEL: @test41(
695 ; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[Y:%.*]], -1
696 ; CHECK-NEXT: [[RES:%.*]] = call i32 @llvm.smax.i32(i32 [[X:%.*]], i32 [[TMP1]])
697 ; CHECK-NEXT: ret i32 [[RES]]
699 %notx = xor i32 %x, -1
700 %cmp1 = icmp slt i32 %notx, %y
701 %smin = select i1 %cmp1, i32 %notx, i32 %y
702 %res = xor i32 %smin, -1
706 define i32 @test42(i32 %x, i32 %y) {
707 ; CHECK-LABEL: @test42(
708 ; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[Y:%.*]], -1
709 ; CHECK-NEXT: [[RES:%.*]] = call i32 @llvm.umin.i32(i32 [[X:%.*]], i32 [[TMP1]])
710 ; CHECK-NEXT: ret i32 [[RES]]
712 %notx = xor i32 %x, -1
713 %cmp1 = icmp ugt i32 %notx, %y
714 %umax = select i1 %cmp1, i32 %notx, i32 %y
715 %res = xor i32 %umax, -1
719 define i32 @test43(i32 %x, i32 %y) {
720 ; CHECK-LABEL: @test43(
721 ; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[Y:%.*]], -1
722 ; CHECK-NEXT: [[RES:%.*]] = call i32 @llvm.umax.i32(i32 [[X:%.*]], i32 [[TMP1]])
723 ; CHECK-NEXT: ret i32 [[RES]]
725 %notx = xor i32 %x, -1
726 %cmp1 = icmp ult i32 %notx, %y
727 %umin = select i1 %cmp1, i32 %notx, i32 %y
728 %res = xor i32 %umin, -1
732 define i32 @test44(i32 %x, i32 %y) {
733 ; CHECK-LABEL: @test44(
734 ; CHECK-NEXT: [[TMP1:%.*]] = sub i32 -4, [[Y:%.*]]
735 ; CHECK-NEXT: [[TMP2:%.*]] = call i32 @llvm.umax.i32(i32 [[X:%.*]], i32 [[TMP1]])
736 ; CHECK-NEXT: ret i32 [[TMP2]]
738 %z = add i32 %y, 3 ; thwart complexity-based canonicalization
739 %notx = xor i32 %x, -1
740 %cmp1 = icmp ult i32 %z, %notx
741 %umin = select i1 %cmp1, i32 %z, i32 %notx
742 %res = xor i32 %umin, -1
746 define i32 @test45(i32 %x, i32 %y) {
747 ; CHECK-LABEL: @test45(
748 ; CHECK-NEXT: [[TMP1:%.*]] = call i32 @llvm.umax.i32(i32 [[Y:%.*]], i32 [[X:%.*]])
749 ; CHECK-NEXT: ret i32 [[TMP1]]
752 %notx = xor i32 %x, -1
753 %cmp1 = icmp ult i32 %z, %notx
754 %umin = select i1 %cmp1, i32 %z, i32 %notx
755 %res = xor i32 %umin, -1
759 ; Check that we work with splat vectors also.
760 define <4 x i32> @test46(<4 x i32> %x) {
761 ; CHECK-LABEL: @test46(
762 ; CHECK-NEXT: [[TMP1:%.*]] = call <4 x i32> @llvm.smin.v4i32(<4 x i32> [[X:%.*]], <4 x i32> splat (i32 255))
763 ; CHECK-NEXT: ret <4 x i32> [[TMP1]]
765 %1 = xor <4 x i32> %x, <i32 -1, i32 -1, i32 -1, i32 -1>
766 %2 = icmp sgt <4 x i32> %1, <i32 -256, i32 -256, i32 -256, i32 -256>
767 %3 = select <4 x i1> %2, <4 x i32> %1, <4 x i32> <i32 -256, i32 -256, i32 -256, i32 -256>
768 %4 = xor <4 x i32> %3, <i32 -1, i32 -1, i32 -1, i32 -1>
772 ; Test case when select pattern has more than one use.
773 define i32 @test47(i32 %x, i32 %y, i32 %z) {
774 ; CHECK-LABEL: @test47(
775 ; CHECK-NEXT: [[NOTX:%.*]] = xor i32 [[X:%.*]], -1
776 ; CHECK-NEXT: [[UMAX:%.*]] = call i32 @llvm.umax.i32(i32 [[Y:%.*]], i32 [[NOTX]])
777 ; CHECK-NEXT: [[UMIN:%.*]] = xor i32 [[UMAX]], -1
778 ; CHECK-NEXT: [[ADD:%.*]] = add i32 [[UMAX]], [[Z:%.*]]
779 ; CHECK-NEXT: [[RES:%.*]] = mul i32 [[ADD]], [[UMIN]]
780 ; CHECK-NEXT: ret i32 [[RES]]
782 %notx = xor i32 %x, -1
783 %cmp1 = icmp ugt i32 %notx, %y
784 %umax = select i1 %cmp1, i32 %notx, i32 %y
785 %umin = xor i32 %umax, -1
786 %add = add i32 %umax, %z
787 %res = mul i32 %umin, %add
791 define i32 @test48(i32 %x) {
792 ; CHECK-LABEL: @test48(
793 ; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[X:%.*]], 1
794 ; CHECK-NEXT: [[D:%.*]] = call i32 @llvm.smin.i32(i32 [[TMP1]], i32 -1)
795 ; CHECK-NEXT: ret i32 [[D]]
798 %b = icmp sgt i32 %a, 0
799 %c = select i1 %b, i32 %a, i32 0
804 define <2 x i32> @test48vec(<2 x i32> %x) {
805 ; CHECK-LABEL: @test48vec(
806 ; CHECK-NEXT: [[TMP1:%.*]] = add <2 x i32> [[X:%.*]], splat (i32 1)
807 ; CHECK-NEXT: [[D:%.*]] = call <2 x i32> @llvm.smin.v2i32(<2 x i32> [[TMP1]], <2 x i32> splat (i32 -1))
808 ; CHECK-NEXT: ret <2 x i32> [[D]]
810 %a = sub <2 x i32> <i32 -2, i32 -2>, %x
811 %b = icmp sgt <2 x i32> %a, zeroinitializer
812 %c = select <2 x i1> %b, <2 x i32> %a, <2 x i32> zeroinitializer
813 %d = xor <2 x i32> %c, <i32 -1, i32 -1>
817 define i32 @test49(i32 %x) {
818 ; CHECK-LABEL: @test49(
819 ; CHECK-NEXT: [[TMP1:%.*]] = sub i32 1, [[X:%.*]]
820 ; CHECK-NEXT: [[D:%.*]] = call i32 @llvm.smax.i32(i32 [[TMP1]], i32 0)
821 ; CHECK-NEXT: ret i32 [[D]]
824 %b = icmp slt i32 %a, -1
825 %c = select i1 %b, i32 %a, i32 -1
830 define <2 x i32> @test49vec(<2 x i32> %x) {
831 ; CHECK-LABEL: @test49vec(
832 ; CHECK-NEXT: [[TMP1:%.*]] = sub <2 x i32> splat (i32 1), [[X:%.*]]
833 ; CHECK-NEXT: [[D:%.*]] = call <2 x i32> @llvm.smax.v2i32(<2 x i32> [[TMP1]], <2 x i32> zeroinitializer)
834 ; CHECK-NEXT: ret <2 x i32> [[D]]
836 %a = add <2 x i32> %x, <i32 -2, i32 -2>
837 %b = icmp slt <2 x i32> %a, <i32 -1, i32 -1>
838 %c = select <2 x i1> %b, <2 x i32> %a, <2 x i32> <i32 -1, i32 -1>
839 %d = xor <2 x i32> %c, <i32 -1, i32 -1>
843 define i32 @test50(i32 %x, i32 %y) {
844 ; CHECK-LABEL: @test50(
845 ; CHECK-NEXT: [[TMP1:%.*]] = sub i32 1, [[X:%.*]]
846 ; CHECK-NEXT: [[TMP2:%.*]] = add i32 [[Y:%.*]], 1
847 ; CHECK-NEXT: [[E:%.*]] = call i32 @llvm.smax.i32(i32 [[TMP1]], i32 [[TMP2]])
848 ; CHECK-NEXT: ret i32 [[E]]
852 %c = icmp slt i32 %a, %b
853 %d = select i1 %c, i32 %a, i32 %b
858 define <2 x i32> @test50vec(<2 x i32> %x, <2 x i32> %y) {
859 ; CHECK-LABEL: @test50vec(
860 ; CHECK-NEXT: [[TMP1:%.*]] = sub <2 x i32> splat (i32 1), [[X:%.*]]
861 ; CHECK-NEXT: [[TMP2:%.*]] = add <2 x i32> [[Y:%.*]], splat (i32 1)
862 ; CHECK-NEXT: [[E:%.*]] = call <2 x i32> @llvm.smax.v2i32(<2 x i32> [[TMP1]], <2 x i32> [[TMP2]])
863 ; CHECK-NEXT: ret <2 x i32> [[E]]
865 %a = add <2 x i32> %x, <i32 -2, i32 -2>
866 %b = sub <2 x i32> <i32 -2, i32 -2>, %y
867 %c = icmp slt <2 x i32> %a, %b
868 %d = select <2 x i1> %c, <2 x i32> %a, <2 x i32> %b
869 %e = xor <2 x i32> %d, <i32 -1, i32 -1>
873 define i32 @test51(i32 %x, i32 %y) {
874 ; CHECK-LABEL: @test51(
875 ; CHECK-NEXT: [[TMP1:%.*]] = sub i32 -3, [[X:%.*]]
876 ; CHECK-NEXT: [[TMP2:%.*]] = add i32 [[Y:%.*]], -3
877 ; CHECK-NEXT: [[E:%.*]] = call i32 @llvm.smin.i32(i32 [[TMP1]], i32 [[TMP2]])
878 ; CHECK-NEXT: ret i32 [[E]]
882 %c = icmp sgt i32 %a, %b
883 %d = select i1 %c, i32 %a, i32 %b
888 define <2 x i32> @test51vec(<2 x i32> %x, <2 x i32> %y) {
889 ; CHECK-LABEL: @test51vec(
890 ; CHECK-NEXT: [[TMP1:%.*]] = sub <2 x i32> splat (i32 -3), [[X:%.*]]
891 ; CHECK-NEXT: [[TMP2:%.*]] = add <2 x i32> [[Y:%.*]], splat (i32 -3)
892 ; CHECK-NEXT: [[E:%.*]] = call <2 x i32> @llvm.smin.v2i32(<2 x i32> [[TMP1]], <2 x i32> [[TMP2]])
893 ; CHECK-NEXT: ret <2 x i32> [[E]]
895 %a = add <2 x i32> %x, <i32 2, i32 2>
896 %b = sub <2 x i32> <i32 2, i32 2>, %y
897 %c = icmp sgt <2 x i32> %a, %b
898 %d = select <2 x i1> %c, <2 x i32> %a, <2 x i32> %b
899 %e = xor <2 x i32> %d, <i32 -1, i32 -1>
903 define i4 @or_or_xor(i4 %x, i4 %y, i4 %z) {
904 ; CHECK-LABEL: @or_or_xor(
905 ; CHECK-NEXT: [[TMP1:%.*]] = xor i4 [[Z:%.*]], -1
906 ; CHECK-NEXT: [[TMP2:%.*]] = xor i4 [[X:%.*]], [[Y:%.*]]
907 ; CHECK-NEXT: [[R:%.*]] = and i4 [[TMP2]], [[TMP1]]
908 ; CHECK-NEXT: ret i4 [[R]]
916 define i4 @or_or_xor_commute1(i4 %x, i4 %y, i4 %z) {
917 ; CHECK-LABEL: @or_or_xor_commute1(
918 ; CHECK-NEXT: [[TMP1:%.*]] = xor i4 [[Z:%.*]], -1
919 ; CHECK-NEXT: [[TMP2:%.*]] = xor i4 [[X:%.*]], [[Y:%.*]]
920 ; CHECK-NEXT: [[R:%.*]] = and i4 [[TMP2]], [[TMP1]]
921 ; CHECK-NEXT: ret i4 [[R]]
929 define i4 @or_or_xor_commute2(i4 %x, i4 %y, i4 %z) {
930 ; CHECK-LABEL: @or_or_xor_commute2(
931 ; CHECK-NEXT: [[TMP1:%.*]] = xor i4 [[Z:%.*]], -1
932 ; CHECK-NEXT: [[TMP2:%.*]] = xor i4 [[X:%.*]], [[Y:%.*]]
933 ; CHECK-NEXT: [[R:%.*]] = and i4 [[TMP2]], [[TMP1]]
934 ; CHECK-NEXT: ret i4 [[R]]
942 define <2 x i4> @or_or_xor_commute3(<2 x i4> %x, <2 x i4> %y, <2 x i4> %z) {
943 ; CHECK-LABEL: @or_or_xor_commute3(
944 ; CHECK-NEXT: [[TMP1:%.*]] = xor <2 x i4> [[Z:%.*]], splat (i4 -1)
945 ; CHECK-NEXT: [[TMP2:%.*]] = xor <2 x i4> [[X:%.*]], [[Y:%.*]]
946 ; CHECK-NEXT: [[R:%.*]] = and <2 x i4> [[TMP2]], [[TMP1]]
947 ; CHECK-NEXT: ret <2 x i4> [[R]]
949 %o1 = or <2 x i4> %x, %z
950 %o2 = or <2 x i4> %y, %z
951 %r = xor <2 x i4> %o1, %o2
955 define i4 @or_or_xor_use1(i4 %x, i4 %y, i4 %z, ptr %p) {
956 ; CHECK-LABEL: @or_or_xor_use1(
957 ; CHECK-NEXT: [[O1:%.*]] = or i4 [[Z:%.*]], [[X:%.*]]
958 ; CHECK-NEXT: store i4 [[O1]], ptr [[P:%.*]], align 1
959 ; CHECK-NEXT: [[O2:%.*]] = or i4 [[Z]], [[Y:%.*]]
960 ; CHECK-NEXT: [[R:%.*]] = xor i4 [[O1]], [[O2]]
961 ; CHECK-NEXT: ret i4 [[R]]
970 define i4 @or_or_xor_use2(i4 %x, i4 %y, i4 %z, ptr %p) {
971 ; CHECK-LABEL: @or_or_xor_use2(
972 ; CHECK-NEXT: [[O1:%.*]] = or i4 [[Z:%.*]], [[X:%.*]]
973 ; CHECK-NEXT: [[O2:%.*]] = or i4 [[Z]], [[Y:%.*]]
974 ; CHECK-NEXT: store i4 [[O2]], ptr [[P:%.*]], align 1
975 ; CHECK-NEXT: [[R:%.*]] = xor i4 [[O1]], [[O2]]
976 ; CHECK-NEXT: ret i4 [[R]]
985 ; PR32706 - https://bugs.llvm.org/show_bug.cgi?id=32706
986 ; Pin an xor constant operand to -1 if possible because 'not' is better for SCEV and codegen.
988 define i32 @not_is_canonical(i32 %x, i32 %y) {
989 ; CHECK-LABEL: @not_is_canonical(
990 ; CHECK-NEXT: [[SUB:%.*]] = xor i32 [[X:%.*]], -1
991 ; CHECK-NEXT: [[ADD:%.*]] = add i32 [[Y:%.*]], [[SUB]]
992 ; CHECK-NEXT: [[MUL:%.*]] = shl i32 [[ADD]], 2
993 ; CHECK-NEXT: ret i32 [[MUL]]
995 %sub = xor i32 %x, 1073741823
996 %add = add i32 %sub, %y
997 %mul = shl i32 %add, 2
1001 define i8 @not_shl(i8 %x) {
1002 ; CHECK-LABEL: @not_shl(
1003 ; CHECK-NEXT: [[TMP1:%.*]] = xor i8 [[X:%.*]], -1
1004 ; CHECK-NEXT: [[R:%.*]] = shl i8 [[TMP1]], 7
1005 ; CHECK-NEXT: ret i8 [[R]]
1012 define <2 x i8> @not_shl_vec(<2 x i8> %x) {
1013 ; CHECK-LABEL: @not_shl_vec(
1014 ; CHECK-NEXT: [[TMP1:%.*]] = xor <2 x i8> [[X:%.*]], splat (i8 -1)
1015 ; CHECK-NEXT: [[R:%.*]] = shl <2 x i8> [[TMP1]], splat (i8 5)
1016 ; CHECK-NEXT: ret <2 x i8> [[R]]
1018 %a = shl <2 x i8> %x, <i8 5, i8 5>
1019 %r = xor <2 x i8> %a, <i8 224, i8 224>
1025 define i8 @not_shl_extra_use(i8 %x) {
1026 ; CHECK-LABEL: @not_shl_extra_use(
1027 ; CHECK-NEXT: [[A:%.*]] = shl i8 [[X:%.*]], 7
1028 ; CHECK-NEXT: call void @use(i8 [[A]])
1029 ; CHECK-NEXT: [[R:%.*]] = xor i8 [[A]], -128
1030 ; CHECK-NEXT: ret i8 [[R]]
1033 call void @use(i8 %a)
1040 define i8 @not_shl_wrong_const(i8 %x) {
1041 ; CHECK-LABEL: @not_shl_wrong_const(
1042 ; CHECK-NEXT: [[A:%.*]] = shl i8 [[X:%.*]], 6
1043 ; CHECK-NEXT: [[R:%.*]] = xor i8 [[A]], -128
1044 ; CHECK-NEXT: ret i8 [[R]]
1051 define i8 @not_lshr(i8 %x) {
1052 ; CHECK-LABEL: @not_lshr(
1053 ; CHECK-NEXT: [[TMP1:%.*]] = xor i8 [[X:%.*]], -1
1054 ; CHECK-NEXT: [[R:%.*]] = lshr i8 [[TMP1]], 5
1055 ; CHECK-NEXT: ret i8 [[R]]
1062 define <2 x i8> @not_lshr_vec(<2 x i8> %x) {
1063 ; CHECK-LABEL: @not_lshr_vec(
1064 ; CHECK-NEXT: [[ISNOTNEG:%.*]] = icmp sgt <2 x i8> [[X:%.*]], splat (i8 -1)
1065 ; CHECK-NEXT: [[R:%.*]] = zext <2 x i1> [[ISNOTNEG]] to <2 x i8>
1066 ; CHECK-NEXT: ret <2 x i8> [[R]]
1068 %a = lshr <2 x i8> %x, <i8 7, i8 7>
1069 %r = xor <2 x i8> %a, <i8 1, i8 1>
1075 define i8 @not_lshr_extra_use(i8 %x) {
1076 ; CHECK-LABEL: @not_lshr_extra_use(
1077 ; CHECK-NEXT: [[A:%.*]] = lshr i8 [[X:%.*]], 5
1078 ; CHECK-NEXT: call void @use(i8 [[A]])
1079 ; CHECK-NEXT: [[R:%.*]] = xor i8 [[A]], 7
1080 ; CHECK-NEXT: ret i8 [[R]]
1083 call void @use(i8 %a)
1090 define i8 @not_lshr_wrong_const(i8 %x) {
1091 ; CHECK-LABEL: @not_lshr_wrong_const(
1092 ; CHECK-NEXT: [[A:%.*]] = lshr i8 [[X:%.*]], 5
1093 ; CHECK-NEXT: [[R:%.*]] = xor i8 [[A]], 3
1094 ; CHECK-NEXT: ret i8 [[R]]
1101 define i8 @ashr_not(i8 %x) {
1102 ; CHECK-LABEL: @ashr_not(
1103 ; CHECK-NEXT: [[N:%.*]] = ashr i8 [[X:%.*]], 5
1104 ; CHECK-NEXT: [[R:%.*]] = xor i8 [[N]], -1
1105 ; CHECK-NEXT: ret i8 [[R]]
1112 ; Unlike the logicial shifts, 'not' is canonicalized after ashr.
1114 define i8 @not_ashr(i8 %x) {
1115 ; CHECK-LABEL: @not_ashr(
1116 ; CHECK-NEXT: [[A:%.*]] = ashr i8 [[X:%.*]], 5
1117 ; CHECK-NEXT: [[R:%.*]] = xor i8 [[A]], -1
1118 ; CHECK-NEXT: ret i8 [[R]]
1125 define <2 x i8> @not_ashr_vec(<2 x i8> %x) {
1126 ; CHECK-LABEL: @not_ashr_vec(
1127 ; CHECK-NEXT: [[ISNOTNEG:%.*]] = icmp sgt <2 x i8> [[X:%.*]], splat (i8 -1)
1128 ; CHECK-NEXT: [[R:%.*]] = sext <2 x i1> [[ISNOTNEG]] to <2 x i8>
1129 ; CHECK-NEXT: ret <2 x i8> [[R]]
1131 %a = ashr <2 x i8> %x, <i8 7, i8 7>
1132 %r = xor <2 x i8> %a, <i8 -1, i8 -1>
1136 define i8 @not_ashr_extra_use(i8 %x) {
1137 ; CHECK-LABEL: @not_ashr_extra_use(
1138 ; CHECK-NEXT: [[A:%.*]] = ashr i8 [[X:%.*]], 5
1139 ; CHECK-NEXT: call void @use(i8 [[A]])
1140 ; CHECK-NEXT: [[R:%.*]] = xor i8 [[A]], -1
1141 ; CHECK-NEXT: ret i8 [[R]]
1144 call void @use(i8 %a)
1149 define i8 @not_ashr_wrong_const(i8 %x) {
1150 ; CHECK-LABEL: @not_ashr_wrong_const(
1151 ; CHECK-NEXT: [[A:%.*]] = ashr i8 [[X:%.*]], 5
1152 ; CHECK-NEXT: [[R:%.*]] = xor i8 [[A]], -2
1153 ; CHECK-NEXT: ret i8 [[R]]
1160 ; (~A & B) ^ A --> A | B
1162 define <2 x i32> @xor_andn_commute1(<2 x i32> %a, <2 x i32> %b) {
1163 ; CHECK-LABEL: @xor_andn_commute1(
1164 ; CHECK-NEXT: [[Z:%.*]] = or <2 x i32> [[A:%.*]], [[B:%.*]]
1165 ; CHECK-NEXT: ret <2 x i32> [[Z]]
1167 %nota = xor <2 x i32> %a, <i32 -1, i32 -1>
1168 %r = and <2 x i32> %nota, %b
1169 %z = xor <2 x i32> %r, %a
1173 ; (B & ~A) ^ A --> A | B
1175 define i33 @xor_andn_commute2(i33 %a, i33 %pb) {
1176 ; CHECK-LABEL: @xor_andn_commute2(
1177 ; CHECK-NEXT: [[B:%.*]] = udiv i33 42, [[PB:%.*]]
1178 ; CHECK-NEXT: [[Z:%.*]] = or i33 [[A:%.*]], [[B]]
1179 ; CHECK-NEXT: ret i33 [[Z]]
1181 %b = udiv i33 42, %pb ; thwart complexity-based canonicalization
1182 %nota = xor i33 %a, -1
1183 %r = and i33 %b, %nota
1188 ; A ^ (~A & B) --> A | B
1190 define i32 @xor_andn_commute3(i32 %pa, i32 %b) {
1191 ; CHECK-LABEL: @xor_andn_commute3(
1192 ; CHECK-NEXT: [[A:%.*]] = udiv i32 42, [[PA:%.*]]
1193 ; CHECK-NEXT: [[Z:%.*]] = or i32 [[A]], [[B:%.*]]
1194 ; CHECK-NEXT: ret i32 [[Z]]
1196 %a = udiv i32 42, %pa ; thwart complexity-based canonicalization
1197 %nota = xor i32 %a, -1
1198 %r = and i32 %nota, %b
1203 ; A ^ (B & ~A) --> A | B
1205 define i32 @xor_andn_commute4(i32 %pa, i32 %pb) {
1206 ; CHECK-LABEL: @xor_andn_commute4(
1207 ; CHECK-NEXT: [[A:%.*]] = udiv i32 42, [[PA:%.*]]
1208 ; CHECK-NEXT: [[B:%.*]] = udiv i32 42, [[PB:%.*]]
1209 ; CHECK-NEXT: [[Z:%.*]] = or i32 [[A]], [[B]]
1210 ; CHECK-NEXT: ret i32 [[Z]]
1212 %a = udiv i32 42, %pa ; thwart complexity-based canonicalization
1213 %b = udiv i32 42, %pb ; thwart complexity-based canonicalization
1214 %nota = xor i32 %a, -1
1215 %r = and i32 %b, %nota
1220 ; (~A | B) ^ A --> ~(A & B)
1222 define <2 x i64> @xor_orn(<2 x i64> %a, <2 x i64> %b) {
1223 ; CHECK-LABEL: @xor_orn(
1224 ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i64> [[A:%.*]], [[B:%.*]]
1225 ; CHECK-NEXT: [[Z:%.*]] = xor <2 x i64> [[TMP1]], splat (i64 -1)
1226 ; CHECK-NEXT: ret <2 x i64> [[Z]]
1228 %nota = xor <2 x i64> %a, <i64 -1, i64 -1>
1229 %l = or <2 x i64> %nota, %b
1230 %z = xor <2 x i64> %l, %a
1234 ; A ^ (~A | B) --> ~(A & B)
1236 define i8 @xor_orn_commute1(i8 %pa, i8 %b) {
1237 ; CHECK-LABEL: @xor_orn_commute1(
1238 ; CHECK-NEXT: [[A:%.*]] = udiv i8 42, [[PA:%.*]]
1239 ; CHECK-NEXT: [[TMP1:%.*]] = and i8 [[A]], [[B:%.*]]
1240 ; CHECK-NEXT: [[Z:%.*]] = xor i8 [[TMP1]], -1
1241 ; CHECK-NEXT: ret i8 [[Z]]
1243 %a = udiv i8 42, %pa
1244 %nota = xor i8 %a, -1
1245 %l = or i8 %nota, %b
1250 ; (B | ~A) ^ A --> ~(A & B)
1252 define i32 @xor_orn_commute2(i32 %a, i32 %pb,ptr %s) {
1253 ; CHECK-LABEL: @xor_orn_commute2(
1254 ; CHECK-NEXT: [[B:%.*]] = udiv i32 42, [[PB:%.*]]
1255 ; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[A:%.*]], [[B]]
1256 ; CHECK-NEXT: [[Z:%.*]] = xor i32 [[TMP1]], -1
1257 ; CHECK-NEXT: ret i32 [[Z]]
1259 %b = udiv i32 42, %pb
1260 %nota = xor i32 %a, -1
1261 %l = or i32 %b, %nota
1266 define i32 @xor_orn_commute2_1use(i32 %a, i32 %pb,ptr %s) {
1267 ; CHECK-LABEL: @xor_orn_commute2_1use(
1268 ; CHECK-NEXT: [[B:%.*]] = udiv i32 42, [[PB:%.*]]
1269 ; CHECK-NEXT: [[NOTA:%.*]] = xor i32 [[A:%.*]], -1
1270 ; CHECK-NEXT: store i32 [[NOTA]], ptr [[S:%.*]], align 4
1271 ; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[A]], [[B]]
1272 ; CHECK-NEXT: [[Z:%.*]] = xor i32 [[TMP1]], -1
1273 ; CHECK-NEXT: ret i32 [[Z]]
1275 %b = udiv i32 42, %pb
1276 %nota = xor i32 %a, -1
1277 %l = or i32 %b, %nota
1278 store i32 %nota, ptr %s
1283 ; A ^ (B | ~A) --> ~(A & B)
1285 define i67 @xor_orn_commute3(i67 %pa, i67 %pb, ptr %s) {
1286 ; CHECK-LABEL: @xor_orn_commute3(
1287 ; CHECK-NEXT: [[A:%.*]] = udiv i67 42, [[PA:%.*]]
1288 ; CHECK-NEXT: [[B:%.*]] = udiv i67 42, [[PB:%.*]]
1289 ; CHECK-NEXT: [[TMP1:%.*]] = and i67 [[A]], [[B]]
1290 ; CHECK-NEXT: [[Z:%.*]] = xor i67 [[TMP1]], -1
1291 ; CHECK-NEXT: ret i67 [[Z]]
1293 %a = udiv i67 42, %pa
1294 %b = udiv i67 42, %pb
1295 %nota = xor i67 %a, -1
1296 %l = or i67 %b, %nota
1301 define i67 @xor_orn_commute3_1use(i67 %pa, i67 %pb, ptr %s) {
1302 ; CHECK-LABEL: @xor_orn_commute3_1use(
1303 ; CHECK-NEXT: [[A:%.*]] = udiv i67 42, [[PA:%.*]]
1304 ; CHECK-NEXT: [[B:%.*]] = udiv i67 42, [[PB:%.*]]
1305 ; CHECK-NEXT: [[NOTA:%.*]] = xor i67 [[A]], -1
1306 ; CHECK-NEXT: [[L:%.*]] = or i67 [[B]], [[NOTA]]
1307 ; CHECK-NEXT: store i67 [[L]], ptr [[S:%.*]], align 4
1308 ; CHECK-NEXT: [[Z:%.*]] = xor i67 [[A]], [[L]]
1309 ; CHECK-NEXT: ret i67 [[Z]]
1311 %a = udiv i67 42, %pa
1312 %b = udiv i67 42, %pb
1313 %nota = xor i67 %a, -1
1314 %l = or i67 %b, %nota
1315 store i67 %l, ptr %s
1320 define i32 @xor_orn_2use(i32 %a, i32 %b, ptr %s1, ptr %s2) {
1321 ; CHECK-LABEL: @xor_orn_2use(
1322 ; CHECK-NEXT: [[NOTA:%.*]] = xor i32 [[A:%.*]], -1
1323 ; CHECK-NEXT: store i32 [[NOTA]], ptr [[S1:%.*]], align 4
1324 ; CHECK-NEXT: [[L:%.*]] = or i32 [[B:%.*]], [[NOTA]]
1325 ; CHECK-NEXT: store i32 [[L]], ptr [[S2:%.*]], align 4
1326 ; CHECK-NEXT: [[Z:%.*]] = xor i32 [[L]], [[A]]
1327 ; CHECK-NEXT: ret i32 [[Z]]
1329 %nota = xor i32 %a, -1
1330 store i32 %nota, ptr %s1
1331 %l = or i32 %nota, %b
1332 store i32 %l, ptr %s2
1337 define i32 @ctlz_pow2(i32 %x) {
1338 ; CHECK-LABEL: @ctlz_pow2(
1339 ; CHECK-NEXT: [[R:%.*]] = call range(i32 0, 33) i32 @llvm.cttz.i32(i32 [[X:%.*]], i1 true)
1340 ; CHECK-NEXT: ret i32 [[R]]
1344 %z = call i32 @llvm.ctlz.i32(i32 %a, i1 true) ; 0 is poison
1349 ; TODO: %d is known not zero, so this should fold even with arg1 set to false.
1351 define <2 x i8> @cttz_pow2(<2 x i8> %x, <2 x i8> %y) {
1352 ; CHECK-LABEL: @cttz_pow2(
1353 ; CHECK-NEXT: [[S:%.*]] = shl nuw <2 x i8> splat (i8 1), [[X:%.*]]
1354 ; CHECK-NEXT: [[D:%.*]] = udiv exact <2 x i8> [[S]], [[Y:%.*]]
1355 ; CHECK-NEXT: [[R:%.*]] = call range(i8 0, 9) <2 x i8> @llvm.ctlz.v2i8(<2 x i8> [[D]], i1 true)
1356 ; CHECK-NEXT: ret <2 x i8> [[R]]
1358 %s = shl <2 x i8> <i8 1, i8 1>, %x
1359 %d = udiv exact <2 x i8> %s, %y
1360 %z = call <2 x i8> @llvm.cttz.v2i8(<2 x i8> %d, i1 true) ; 0 is poison
1361 %r = xor <2 x i8> %z, <i8 7, i8 7>
1365 ; negative test - 0 input returns 63
1367 define i32 @ctlz_pow2_or_zero(i32 %x) {
1368 ; CHECK-LABEL: @ctlz_pow2_or_zero(
1369 ; CHECK-NEXT: [[N:%.*]] = sub i32 0, [[X:%.*]]
1370 ; CHECK-NEXT: [[A:%.*]] = and i32 [[X]], [[N]]
1371 ; CHECK-NEXT: [[Z:%.*]] = call range(i32 0, 33) i32 @llvm.ctlz.i32(i32 [[A]], i1 false)
1372 ; CHECK-NEXT: [[R:%.*]] = xor i32 [[Z]], 31
1373 ; CHECK-NEXT: ret i32 [[R]]
1377 %z = call i32 @llvm.ctlz.i32(i32 %a, i1 false) ; 0 is not poison
1382 ; negative test - must xor with (bitwidth - 1)
1384 define i32 @ctlz_pow2_wrong_const(i32 %x) {
1385 ; CHECK-LABEL: @ctlz_pow2_wrong_const(
1386 ; CHECK-NEXT: [[N:%.*]] = sub i32 0, [[X:%.*]]
1387 ; CHECK-NEXT: [[A:%.*]] = and i32 [[X]], [[N]]
1388 ; CHECK-NEXT: [[Z:%.*]] = call range(i32 0, 33) i32 @llvm.ctlz.i32(i32 [[A]], i1 true)
1389 ; CHECK-NEXT: [[R:%.*]] = xor i32 [[Z]], 30
1390 ; CHECK-NEXT: ret i32 [[R]]
1394 %z = call i32 @llvm.ctlz.i32(i32 %a, i1 true) ; 0 is poison
1399 ; Tests from PR70582
1400 define i32 @tryFactorization_xor_ashr_lshr(i32 %a) {
1401 ; CHECK-LABEL: @tryFactorization_xor_ashr_lshr(
1402 ; CHECK-NEXT: [[XOR:%.*]] = ashr i32 -8, [[A:%.*]]
1403 ; CHECK-NEXT: ret i32 [[XOR]]
1405 %not = ashr i32 -3, %a
1406 %shr1 = lshr i32 5, %a
1407 %xor = xor i32 %not, %shr1
1411 define i32 @tryFactorization_xor_lshr_ashr(i32 %a) {
1412 ; CHECK-LABEL: @tryFactorization_xor_lshr_ashr(
1413 ; CHECK-NEXT: [[XOR:%.*]] = ashr i32 -8, [[A:%.*]]
1414 ; CHECK-NEXT: ret i32 [[XOR]]
1416 %not = ashr i32 -3, %a
1417 %shr1 = lshr i32 5, %a
1418 %xor = xor i32 %shr1, %not
1422 define i32 @tryFactorization_xor_ashr_lshr_negative_lhs(i32 %a) {
1423 ; CHECK-LABEL: @tryFactorization_xor_ashr_lshr_negative_lhs(
1424 ; CHECK-NEXT: [[NOT:%.*]] = ashr i32 -3, [[A:%.*]]
1425 ; CHECK-NEXT: [[SHR1:%.*]] = lshr i32 -5, [[A]]
1426 ; CHECK-NEXT: [[XOR:%.*]] = xor i32 [[NOT]], [[SHR1]]
1427 ; CHECK-NEXT: ret i32 [[XOR]]
1429 %not = ashr i32 -3, %a
1430 %shr1 = lshr i32 -5, %a
1431 %xor = xor i32 %not, %shr1
1435 define i32 @tryFactorization_xor_lshr_lshr(i32 %a) {
1436 ; CHECK-LABEL: @tryFactorization_xor_lshr_lshr(
1437 ; CHECK-NEXT: [[XOR:%.*]] = lshr i32 -8, [[A:%.*]]
1438 ; CHECK-NEXT: ret i32 [[XOR]]
1440 %not = lshr i32 -3, %a
1441 %shr1 = lshr i32 5, %a
1442 %xor = xor i32 %not, %shr1
1446 define i32 @tryFactorization_xor_ashr_ashr(i32 %a) {
1447 ; CHECK-LABEL: @tryFactorization_xor_ashr_ashr(
1448 ; CHECK-NEXT: [[XOR:%.*]] = lshr i32 6, [[A:%.*]]
1449 ; CHECK-NEXT: ret i32 [[XOR]]
1451 %not = ashr i32 -3, %a
1452 %shr1 = ashr i32 -5, %a
1453 %xor = xor i32 %not, %shr1
1457 ; https://alive2.llvm.org/ce/z/SOxv-e
1458 define i4 @PR96857_xor_with_noundef(i4 %val0, i4 %val1, i4 noundef %val2) {
1459 ; CHECK-LABEL: @PR96857_xor_with_noundef(
1460 ; CHECK-NEXT: [[VAL4:%.*]] = and i4 [[VAL2:%.*]], [[VAL0:%.*]]
1461 ; CHECK-NEXT: [[VAL5:%.*]] = xor i4 [[VAL2]], -1
1462 ; CHECK-NEXT: [[VAL6:%.*]] = and i4 [[VAL1:%.*]], [[VAL5]]
1463 ; CHECK-NEXT: [[VAL7:%.*]] = or disjoint i4 [[VAL4]], [[VAL6]]
1464 ; CHECK-NEXT: ret i4 [[VAL7]]
1466 %val4 = and i4 %val2, %val0
1467 %val5 = xor i4 %val2, -1
1468 %val6 = and i4 %val5, %val1
1469 %val7 = xor i4 %val4, %val6
1473 ; https://alive2.llvm.org/ce/z/whLTaJ
1474 define i4 @PR96857_xor_without_noundef(i4 %val0, i4 %val1, i4 %val2) {
1475 ; CHECK-LABEL: @PR96857_xor_without_noundef(
1476 ; CHECK-NEXT: [[VAL4:%.*]] = and i4 [[VAL2:%.*]], [[VAL0:%.*]]
1477 ; CHECK-NEXT: [[VAL5:%.*]] = xor i4 [[VAL2]], -1
1478 ; CHECK-NEXT: [[VAL6:%.*]] = and i4 [[VAL1:%.*]], [[VAL5]]
1479 ; CHECK-NEXT: [[VAL7:%.*]] = or i4 [[VAL4]], [[VAL6]]
1480 ; CHECK-NEXT: ret i4 [[VAL7]]
1482 %val4 = and i4 %val2, %val0
1483 %val5 = xor i4 %val2, -1
1484 %val6 = and i4 %val5, %val1
1485 %val7 = xor i4 %val4, %val6
1489 define i32 @or_disjoint_with_xor(i32 %a, i32 %b) {
1490 ; CHECK-LABEL: @or_disjoint_with_xor(
1491 ; CHECK-NEXT: entry:
1492 ; CHECK-NEXT: ret i32 [[B:%.*]]
1495 %or = or disjoint i32 %a, %b
1496 %xor = xor i32 %or, %a
1500 define i32 @xor_with_or_disjoint_ab(i32 %a, i32 %b) {
1501 ; CHECK-LABEL: @xor_with_or_disjoint_ab(
1502 ; CHECK-NEXT: entry:
1503 ; CHECK-NEXT: ret i32 [[B:%.*]]
1506 %or = or disjoint i32 %a, %b
1507 %xor = xor i32 %a, %or
1511 define i32 @xor_with_or_disjoint_ba(i32 %a, i32 %b) {
1512 ; CHECK-LABEL: @xor_with_or_disjoint_ba(
1513 ; CHECK-NEXT: entry:
1514 ; CHECK-NEXT: ret i32 [[B:%.*]]
1517 %or = or disjoint i32 %b, %a
1518 %xor = xor i32 %b, %or
1522 define <2 x i32> @or_disjoint_with_xor_vec(<2 x i32> %a, < 2 x i32> %b) {
1523 ; CHECK-LABEL: @or_disjoint_with_xor_vec(
1524 ; CHECK-NEXT: entry:
1525 ; CHECK-NEXT: ret <2 x i32> [[B:%.*]]
1528 %or = or disjoint <2 x i32> %a, %b
1529 %xor = xor <2 x i32> %or, %a
1533 define <2 x i32> @xor_with_or_disjoint_vec(<2 x i32> %a, < 2 x i32> %b) {
1534 ; CHECK-LABEL: @xor_with_or_disjoint_vec(
1535 ; CHECK-NEXT: entry:
1536 ; CHECK-NEXT: ret <2 x i32> [[B:%.*]]
1539 %or = or disjoint <2 x i32> %a, %b
1540 %xor = xor <2 x i32> %a, %or
1544 define i32 @select_or_disjoint_xor(i32 %a, i1 %c) {
1545 ; CHECK-LABEL: @select_or_disjoint_xor(
1546 ; CHECK-NEXT: entry:
1547 ; CHECK-NEXT: [[S:%.*]] = select i1 [[C:%.*]], i32 0, i32 4
1548 ; CHECK-NEXT: [[SHL:%.*]] = shl i32 [[A:%.*]], 4
1549 ; CHECK-NEXT: [[OR:%.*]] = or disjoint i32 [[S]], [[SHL]]
1550 ; CHECK-NEXT: [[XOR:%.*]] = xor i32 [[OR]], 4
1551 ; CHECK-NEXT: ret i32 [[XOR]]
1554 %s = select i1 %c, i32 0, i32 4
1555 %shl = shl i32 %a, 4
1556 %or = or disjoint i32 %s, %shl
1557 %xor = xor i32 %or, 4
1561 define <2 x i32> @select_or_disjoint_xor_vec(<2 x i32> %a, i1 %c) {
1562 ; CHECK-LABEL: @select_or_disjoint_xor_vec(
1563 ; CHECK-NEXT: entry:
1564 ; CHECK-NEXT: [[S:%.*]] = select i1 [[C:%.*]], <2 x i32> zeroinitializer, <2 x i32> splat (i32 4)
1565 ; CHECK-NEXT: [[SHL:%.*]] = shl <2 x i32> [[A:%.*]], splat (i32 4)
1566 ; CHECK-NEXT: [[OR:%.*]] = or disjoint <2 x i32> [[S]], [[SHL]]
1567 ; CHECK-NEXT: [[XOR:%.*]] = xor <2 x i32> [[OR]], splat (i32 4)
1568 ; CHECK-NEXT: ret <2 x i32> [[XOR]]
1571 %s = select i1 %c, <2 x i32> <i32 0, i32 0>, <2 x i32> <i32 4, i32 4>
1572 %shl = shl <2 x i32> %a, <i32 4, i32 4>
1573 %or = or <2 x i32> %s, %shl
1574 %xor = xor <2 x i32> %or, <i32 4, i32 4>
1578 define i32 @select_or_disjoint_or(i32 %a, i1 %c) {
1579 ; CHECK-LABEL: @select_or_disjoint_or(
1580 ; CHECK-NEXT: entry:
1581 ; CHECK-NEXT: [[S:%.*]] = select i1 [[C:%.*]], i32 0, i32 4
1582 ; CHECK-NEXT: [[SHL:%.*]] = shl i32 [[A:%.*]], 4
1583 ; CHECK-NEXT: [[OR:%.*]] = or disjoint i32 [[S]], [[SHL]]
1584 ; CHECK-NEXT: [[ADD:%.*]] = add nuw nsw i32 [[OR]], 4
1585 ; CHECK-NEXT: ret i32 [[ADD]]
1588 %s = select i1 %c, i32 0, i32 4
1589 %shl = shl i32 %a, 4
1590 %or = or disjoint i32 %s, %shl
1591 %add = add i32 %or, 4
1595 define <2 x i32> @select_or_disjoint_or_vec(<2 x i32> %a, i1 %c) {
1596 ; CHECK-LABEL: @select_or_disjoint_or_vec(
1597 ; CHECK-NEXT: entry:
1598 ; CHECK-NEXT: [[S:%.*]] = select i1 [[C:%.*]], <2 x i32> zeroinitializer, <2 x i32> splat (i32 4)
1599 ; CHECK-NEXT: [[SHL:%.*]] = shl <2 x i32> [[A:%.*]], splat (i32 4)
1600 ; CHECK-NEXT: [[OR:%.*]] = or disjoint <2 x i32> [[S]], [[SHL]]
1601 ; CHECK-NEXT: [[ADD:%.*]] = add nuw nsw <2 x i32> [[OR]], splat (i32 4)
1602 ; CHECK-NEXT: ret <2 x i32> [[ADD]]
1605 %s = select i1 %c, <2 x i32> <i32 0, i32 0>, <2 x i32> <i32 4, i32 4>
1606 %shl = shl <2 x i32> %a, <i32 4, i32 4>
1607 %or = or <2 x i32> %s, %shl
1608 %add = add <2 x i32> %or, <i32 4, i32 4>
1612 define i32 @or_multi_use_disjoint_with_xor(i32 %a, i32 %b, i32 %c) {
1613 ; CHECK-LABEL: @or_multi_use_disjoint_with_xor(
1614 ; CHECK-NEXT: entry:
1615 ; CHECK-NEXT: [[OR:%.*]] = or disjoint i32 [[A:%.*]], [[B:%.*]]
1616 ; CHECK-NEXT: [[XOR:%.*]] = xor i32 [[OR]], [[C:%.*]]
1617 ; CHECK-NEXT: [[ADD:%.*]] = add i32 [[OR]], [[XOR]]
1618 ; CHECK-NEXT: ret i32 [[ADD]]
1621 %or = or disjoint i32 %a, %b
1622 %xor = xor i32 %or, %c
1623 %add = add i32 %or, %xor
1627 define <2 x i32> @or_multi_use_disjoint_with_xor_vec(<2 x i32> %a, <2 x i32> %b, <2 x i32> %c) {
1628 ; CHECK-LABEL: @or_multi_use_disjoint_with_xor_vec(
1629 ; CHECK-NEXT: entry:
1630 ; CHECK-NEXT: [[OR:%.*]] = or disjoint <2 x i32> [[A:%.*]], [[B:%.*]]
1631 ; CHECK-NEXT: [[XOR:%.*]] = xor <2 x i32> [[OR]], [[C:%.*]]
1632 ; CHECK-NEXT: [[ADD:%.*]] = add <2 x i32> [[OR]], [[XOR]]
1633 ; CHECK-NEXT: ret <2 x i32> [[ADD]]
1636 %or = or disjoint <2 x i32> %a, %b
1637 %xor = xor <2 x i32> %or, %c
1638 %add = add <2 x i32> %or, %xor
1642 define i32 @add_with_or(i32 %a, i32 %b, i32 %c) {
1643 ; CHECK-LABEL: @add_with_or(
1644 ; CHECK-NEXT: entry:
1645 ; CHECK-NEXT: [[ADD:%.*]] = add i32 [[A:%.*]], [[B:%.*]]
1646 ; CHECK-NEXT: [[OR:%.*]] = or i32 [[ADD]], [[C:%.*]]
1647 ; CHECK-NEXT: ret i32 [[OR]]
1650 %add = add i32 %a, %b
1651 %or = or i32 %add, %c
1655 define <2 x i32> @add_with_or_vec(<2 x i32> %a, <2 x i32> %b, <2 x i32> %c) {
1656 ; CHECK-LABEL: @add_with_or_vec(
1657 ; CHECK-NEXT: entry:
1658 ; CHECK-NEXT: [[ADD:%.*]] = add <2 x i32> [[A:%.*]], [[B:%.*]]
1659 ; CHECK-NEXT: [[OR:%.*]] = or <2 x i32> [[ADD]], [[C:%.*]]
1660 ; CHECK-NEXT: ret <2 x i32> [[OR]]
1663 %add = add <2 x i32> %a, %b
1664 %or = or <2 x i32> %add, %c