xref: /llvm-project/llvm/test/Transforms/InstCombine/sub.ll (revision 462cb3cd6cecd0511ecaf0e3ebcaba455ece587d)
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt < %s -passes=instcombine -S | FileCheck %s
3
4target datalayout = "e-p:64:64:64-p1:16:16:16-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
5
6define i32 @sub_constant(i32 %x) {
7; CHECK-LABEL: @sub_constant(
8; CHECK-NEXT:    [[R:%.*]] = add i32 [[X:%.*]], -42
9; CHECK-NEXT:    ret i32 [[R]]
10;
11  %r = sub i32 %x, 42
12  ret i32 %r
13}
14
15@g = global i32 0
16
17define i32 @sub_constant_expression(i32 %x) {
18; CHECK-LABEL: @sub_constant_expression(
19; CHECK-NEXT:    [[R:%.*]] = sub i32 [[X:%.*]], ptrtoint (ptr @g to i32)
20; CHECK-NEXT:    ret i32 [[R]]
21;
22  %r = sub i32 %x, ptrtoint (ptr @g to i32)
23  ret i32 %r
24}
25
26define <2 x i32> @sub_constant_vec(<2 x i32> %x) {
27; CHECK-LABEL: @sub_constant_vec(
28; CHECK-NEXT:    [[R:%.*]] = add <2 x i32> [[X:%.*]], <i32 -42, i32 12>
29; CHECK-NEXT:    ret <2 x i32> [[R]]
30;
31  %r = sub <2 x i32> %x, <i32 42, i32 -12>
32  ret <2 x i32> %r
33}
34
35define <3 x i33> @sub_constant_vec_weird_type(<3 x i33> %x) {
36; CHECK-LABEL: @sub_constant_vec_weird_type(
37; CHECK-NEXT:    [[R:%.*]] = add <3 x i33> [[X:%.*]], <i33 42, i33 -42, i33 12>
38; CHECK-NEXT:    ret <3 x i33> [[R]]
39;
40  %r = sub <3 x i33> %x, <i33 -42, i33 42, i33 -12>
41  ret <3 x i33> %r
42}
43
44define <4 x i32> @sub_constant_expression_vec(<4 x i32> %x) {
45; CHECK-LABEL: @sub_constant_expression_vec(
46; CHECK-NEXT:    [[R:%.*]] = sub <4 x i32> [[X:%.*]], bitcast (i128 ptrtoint (ptr @g to i128) to <4 x i32>)
47; CHECK-NEXT:    ret <4 x i32> [[R]]
48;
49  %r = sub <4 x i32> %x, bitcast (i128 ptrtoint (ptr @g to i128) to <4 x i32>)
50  ret <4 x i32> %r
51}
52
53define i32 @neg_sub(i32 %x, i32 %y) {
54; CHECK-LABEL: @neg_sub(
55; CHECK-NEXT:    [[R:%.*]] = add i32 [[Y:%.*]], [[X:%.*]]
56; CHECK-NEXT:    ret i32 [[R]]
57;
58  %neg = sub i32 0, %x
59  %r = sub i32 %y, %neg
60  ret i32 %r
61}
62
63define i32 @neg_nsw_sub(i32 %x, i32 %y) {
64; CHECK-LABEL: @neg_nsw_sub(
65; CHECK-NEXT:    [[R:%.*]] = add i32 [[Y:%.*]], [[X:%.*]]
66; CHECK-NEXT:    ret i32 [[R]]
67;
68  %neg = sub nsw i32 0, %x
69  %r = sub i32 %y, %neg
70  ret i32 %r
71}
72
73define i32 @neg_sub_nsw(i32 %x, i32 %y) {
74; CHECK-LABEL: @neg_sub_nsw(
75; CHECK-NEXT:    [[R:%.*]] = add i32 [[Y:%.*]], [[X:%.*]]
76; CHECK-NEXT:    ret i32 [[R]]
77;
78  %neg = sub i32 0, %x
79  %r = sub nsw i32 %y, %neg
80  ret i32 %r
81}
82
83define i32 @neg_nsw_sub_nsw(i32 %x, i32 %y) {
84; CHECK-LABEL: @neg_nsw_sub_nsw(
85; CHECK-NEXT:    [[R:%.*]] = add nsw i32 [[Y:%.*]], [[X:%.*]]
86; CHECK-NEXT:    ret i32 [[R]]
87;
88  %neg = sub nsw i32 0, %x
89  %r = sub nsw i32 %y, %neg
90  ret i32 %r
91}
92
93define <2 x i32> @neg_sub_vec(<2 x i32> %x, <2 x i32> %y) {
94; CHECK-LABEL: @neg_sub_vec(
95; CHECK-NEXT:    [[R:%.*]] = add <2 x i32> [[Y:%.*]], [[X:%.*]]
96; CHECK-NEXT:    ret <2 x i32> [[R]]
97;
98  %neg = sub <2 x i32> zeroinitializer, %x
99  %r = sub <2 x i32> %y, %neg
100  ret <2 x i32> %r
101}
102
103define <2 x i32> @neg_nsw_sub_vec(<2 x i32> %x, <2 x i32> %y) {
104; CHECK-LABEL: @neg_nsw_sub_vec(
105; CHECK-NEXT:    [[R:%.*]] = add <2 x i32> [[Y:%.*]], [[X:%.*]]
106; CHECK-NEXT:    ret <2 x i32> [[R]]
107;
108  %neg = sub nsw <2 x i32> zeroinitializer, %x
109  %r = sub <2 x i32> %y, %neg
110  ret <2 x i32> %r
111}
112
113define <2 x i32> @neg_sub_nsw_vec(<2 x i32> %x, <2 x i32> %y) {
114; CHECK-LABEL: @neg_sub_nsw_vec(
115; CHECK-NEXT:    [[R:%.*]] = add <2 x i32> [[Y:%.*]], [[X:%.*]]
116; CHECK-NEXT:    ret <2 x i32> [[R]]
117;
118  %neg = sub <2 x i32> zeroinitializer, %x
119  %r = sub nsw <2 x i32> %y, %neg
120  ret <2 x i32> %r
121}
122
123define <2 x i32> @neg_nsw_sub_nsw_vec(<2 x i32> %x, <2 x i32> %y) {
124; CHECK-LABEL: @neg_nsw_sub_nsw_vec(
125; CHECK-NEXT:    [[R:%.*]] = add nsw <2 x i32> [[Y:%.*]], [[X:%.*]]
126; CHECK-NEXT:    ret <2 x i32> [[R]]
127;
128  %neg = sub nsw <2 x i32> zeroinitializer, %x
129  %r = sub nsw <2 x i32> %y, %neg
130  ret <2 x i32> %r
131}
132
133define <2 x i32> @neg_sub_vec_poison(<2 x i32> %x, <2 x i32> %y) {
134; CHECK-LABEL: @neg_sub_vec_poison(
135; CHECK-NEXT:    [[R:%.*]] = add <2 x i32> [[Y:%.*]], [[X:%.*]]
136; CHECK-NEXT:    ret <2 x i32> [[R]]
137;
138  %neg = sub <2 x i32> <i32 0, i32 poison>, %x
139  %r = sub <2 x i32> %y, %neg
140  ret <2 x i32> %r
141}
142
143define <2 x i32> @neg_nsw_sub_vec_poison(<2 x i32> %x, <2 x i32> %y) {
144; CHECK-LABEL: @neg_nsw_sub_vec_poison(
145; CHECK-NEXT:    [[R:%.*]] = add <2 x i32> [[Y:%.*]], [[X:%.*]]
146; CHECK-NEXT:    ret <2 x i32> [[R]]
147;
148  %neg = sub nsw <2 x i32> <i32 poison, i32 0>, %x
149  %r = sub <2 x i32> %y, %neg
150  ret <2 x i32> %r
151}
152
153define <2 x i32> @neg_sub_nsw_vec_poison(<2 x i32> %x, <2 x i32> %y) {
154; CHECK-LABEL: @neg_sub_nsw_vec_poison(
155; CHECK-NEXT:    [[R:%.*]] = add <2 x i32> [[Y:%.*]], [[X:%.*]]
156; CHECK-NEXT:    ret <2 x i32> [[R]]
157;
158  %neg = sub <2 x i32> <i32 poison, i32 0>, %x
159  %r = sub nsw <2 x i32> %y, %neg
160  ret <2 x i32> %r
161}
162
163; This should not drop 'nsw'.
164
165define <2 x i32> @neg_nsw_sub_nsw_vec_poison(<2 x i32> %x, <2 x i32> %y) {
166; CHECK-LABEL: @neg_nsw_sub_nsw_vec_poison(
167; CHECK-NEXT:    [[R:%.*]] = add nsw <2 x i32> [[Y:%.*]], [[X:%.*]]
168; CHECK-NEXT:    ret <2 x i32> [[R]]
169;
170  %neg = sub nsw <2 x i32> <i32 0, i32 poison>, %x
171  %r = sub nsw <2 x i32> %y, %neg
172  ret <2 x i32> %r
173}
174
175; (~X) - (~Y) --> Y - X
176; Also, show that we can handle extra uses and vectors.
177
178declare void @use8(i8)
179
180define i8 @notnotsub(i8 %x, i8 %y) {
181; CHECK-LABEL: @notnotsub(
182; CHECK-NEXT:    [[NX:%.*]] = xor i8 [[X:%.*]], -1
183; CHECK-NEXT:    [[NY:%.*]] = xor i8 [[Y:%.*]], -1
184; CHECK-NEXT:    [[SUB:%.*]] = sub i8 [[Y]], [[X]]
185; CHECK-NEXT:    call void @use8(i8 [[NX]])
186; CHECK-NEXT:    call void @use8(i8 [[NY]])
187; CHECK-NEXT:    ret i8 [[SUB]]
188;
189  %nx = xor i8 %x, -1
190  %ny = xor i8 %y, -1
191  %sub = sub i8 %nx, %ny
192  call void @use8(i8 %nx)
193  call void @use8(i8 %ny)
194  ret i8 %sub
195}
196
197define <2 x i8> @notnotsub_vec(<2 x i8> %x, <2 x i8> %y) {
198; CHECK-LABEL: @notnotsub_vec(
199; CHECK-NEXT:    [[SUB:%.*]] = sub <2 x i8> [[Y:%.*]], [[X:%.*]]
200; CHECK-NEXT:    ret <2 x i8> [[SUB]]
201;
202  %nx = xor <2 x i8> %x, <i8 -1, i8 -1>
203  %ny = xor <2 x i8> %y, <i8 -1, i8 -1>
204  %sub = sub <2 x i8> %nx, %ny
205  ret <2 x i8> %sub
206}
207
208define <2 x i8> @notnotsub_vec_poison_elts(<2 x i8> %x, <2 x i8> %y) {
209; CHECK-LABEL: @notnotsub_vec_poison_elts(
210; CHECK-NEXT:    [[SUB:%.*]] = sub <2 x i8> [[Y:%.*]], [[X:%.*]]
211; CHECK-NEXT:    ret <2 x i8> [[SUB]]
212;
213  %nx = xor <2 x i8> %x, <i8 poison, i8 -1>
214  %ny = xor <2 x i8> %y, <i8 -1, i8 poison>
215  %sub = sub <2 x i8> %nx, %ny
216  ret <2 x i8> %sub
217}
218
219define i32 @test5(i32 %A, i32 %B, i32 %C) {
220; CHECK-LABEL: @test5(
221; CHECK-NEXT:    [[D_NEG:%.*]] = sub i32 [[C:%.*]], [[B:%.*]]
222; CHECK-NEXT:    [[E:%.*]] = add i32 [[D_NEG]], [[A:%.*]]
223; CHECK-NEXT:    ret i32 [[E]]
224;
225  %D = sub i32 %B, %C
226  %E = sub i32 %A, %D
227  ret i32 %E
228}
229
230define i32 @test6(i32 %A, i32 %B) {
231; CHECK-LABEL: @test6(
232; CHECK-NEXT:    [[B_NOT:%.*]] = xor i32 [[B:%.*]], -1
233; CHECK-NEXT:    [[D:%.*]] = and i32 [[A:%.*]], [[B_NOT]]
234; CHECK-NEXT:    ret i32 [[D]]
235;
236  %C = and i32 %A, %B
237  %D = sub i32 %A, %C
238  ret i32 %D
239}
240
241define i32 @test6commuted(i32 %A, i32 %B) {
242; CHECK-LABEL: @test6commuted(
243; CHECK-NEXT:    [[B_NOT:%.*]] = xor i32 [[B:%.*]], -1
244; CHECK-NEXT:    [[D:%.*]] = and i32 [[A:%.*]], [[B_NOT]]
245; CHECK-NEXT:    ret i32 [[D]]
246;
247  %C = and i32 %B, %A
248  %D = sub i32 %A, %C
249  ret i32 %D
250}
251
252define i32 @test7(i32 %A) {
253; CHECK-LABEL: @test7(
254; CHECK-NEXT:    [[B:%.*]] = xor i32 [[A:%.*]], -1
255; CHECK-NEXT:    ret i32 [[B]]
256;
257  %B = sub i32 -1, %A
258  ret i32 %B
259}
260
261define i32 @test8(i32 %A) {
262; CHECK-LABEL: @test8(
263; CHECK-NEXT:    [[C:%.*]] = shl i32 [[A:%.*]], 3
264; CHECK-NEXT:    ret i32 [[C]]
265;
266  %B = mul i32 9, %A
267  %C = sub i32 %B, %A
268  ret i32 %C
269}
270
271define i32 @test9(i32 %A) {
272; CHECK-LABEL: @test9(
273; CHECK-NEXT:    [[C:%.*]] = mul i32 [[A:%.*]], -2
274; CHECK-NEXT:    ret i32 [[C]]
275;
276  %B = mul i32 3, %A
277  %C = sub i32 %A, %B
278  ret i32 %C
279}
280
281define i1 @test11(i8 %A, i8 %B) {
282; CHECK-LABEL: @test11(
283; CHECK-NEXT:    [[D:%.*]] = icmp ne i8 [[A:%.*]], [[B:%.*]]
284; CHECK-NEXT:    ret i1 [[D]]
285;
286  %C = sub i8 %A, %B
287  %D = icmp ne i8 %C, 0
288  ret i1 %D
289}
290
291define <2 x i1> @test11vec(<2 x i8> %A, <2 x i8> %B) {
292; CHECK-LABEL: @test11vec(
293; CHECK-NEXT:    [[D:%.*]] = icmp ne <2 x i8> [[A:%.*]], [[B:%.*]]
294; CHECK-NEXT:    ret <2 x i1> [[D]]
295;
296  %C = sub <2 x i8> %A, %B
297  %D = icmp ne <2 x i8> %C, zeroinitializer
298  ret <2 x i1> %D
299}
300
301define i32 @test12(i32 %A) {
302; CHECK-LABEL: @test12(
303; CHECK-NEXT:    [[B_NEG:%.*]] = lshr i32 [[A:%.*]], 31
304; CHECK-NEXT:    ret i32 [[B_NEG]]
305;
306  %B = ashr i32 %A, 31
307  %C = sub i32 0, %B
308  ret i32 %C
309}
310
311define i32 @test13(i32 %A) {
312; CHECK-LABEL: @test13(
313; CHECK-NEXT:    [[B_NEG:%.*]] = ashr i32 [[A:%.*]], 31
314; CHECK-NEXT:    ret i32 [[B_NEG]]
315;
316  %B = lshr i32 %A, 31
317  %C = sub i32 0, %B
318  ret i32 %C
319}
320
321define <2 x i32> @test12vec(<2 x i32> %A) {
322; CHECK-LABEL: @test12vec(
323; CHECK-NEXT:    [[B_NEG:%.*]] = lshr <2 x i32> [[A:%.*]], splat (i32 31)
324; CHECK-NEXT:    ret <2 x i32> [[B_NEG]]
325;
326  %B = ashr <2 x i32> %A, <i32 31, i32 31>
327  %C = sub <2 x i32> zeroinitializer, %B
328  ret <2 x i32> %C
329}
330
331define <2 x i32> @test13vec(<2 x i32> %A) {
332; CHECK-LABEL: @test13vec(
333; CHECK-NEXT:    [[B_NEG:%.*]] = ashr <2 x i32> [[A:%.*]], splat (i32 31)
334; CHECK-NEXT:    ret <2 x i32> [[B_NEG]]
335;
336  %B = lshr <2 x i32> %A, <i32 31, i32 31>
337  %C = sub <2 x i32> zeroinitializer, %B
338  ret <2 x i32> %C
339}
340
341define i32 @test15(i32 %A, i32 %B) {
342; CHECK-LABEL: @test15(
343; CHECK-NEXT:    [[C:%.*]] = sub i32 0, [[A:%.*]]
344; CHECK-NEXT:    [[D:%.*]] = srem i32 [[B:%.*]], [[C]]
345; CHECK-NEXT:    ret i32 [[D]]
346;
347  %C = sub i32 0, %A
348  %D = srem i32 %B, %C
349  ret i32 %D
350}
351
352define i32 @test16(i32 %A) {
353; CHECK-LABEL: @test16(
354; CHECK-NEXT:    [[X_NEG:%.*]] = sdiv i32 [[A:%.*]], -1123
355; CHECK-NEXT:    ret i32 [[X_NEG]]
356;
357  %X = sdiv i32 %A, 1123
358  %Y = sub i32 0, %X
359  ret i32 %Y
360}
361
362; Can't fold subtract here because negation it might oveflow.
363; PR3142
364define i32 @test17(i32 %A) {
365; CHECK-LABEL: @test17(
366; CHECK-NEXT:    [[B:%.*]] = sub i32 0, [[A:%.*]]
367; CHECK-NEXT:    [[C:%.*]] = sdiv i32 [[B]], 1234
368; CHECK-NEXT:    ret i32 [[C]]
369;
370  %B = sub i32 0, %A
371  %C = sdiv i32 %B, 1234
372  ret i32 %C
373}
374
375define i64 @test18(i64 %Y) {
376; CHECK-LABEL: @test18(
377; CHECK-NEXT:    ret i64 0
378;
379  %i.4 = shl i64 %Y, 2
380  %i.12 = shl i64 %Y, 2
381  %i.8 = sub i64 %i.4, %i.12
382  ret i64 %i.8
383}
384
385define i1 @test20(i32 %g, i32 %h) {
386; CHECK-LABEL: @test20(
387; CHECK-NEXT:    [[I_4:%.*]] = icmp ne i32 [[H:%.*]], 0
388; CHECK-NEXT:    ret i1 [[I_4]]
389;
390  %i.2 = sub i32 %g, %h
391  %i.4 = icmp ne i32 %i.2, %g
392  ret i1 %i.4
393}
394
395define i1 @test21(i32 %g, i32 %h) {
396; CHECK-LABEL: @test21(
397; CHECK-NEXT:    [[I_4:%.*]] = icmp ne i32 [[H:%.*]], 0
398; CHECK-NEXT:    ret i1 [[I_4]]
399;
400  %i.2 = sub i32 %g, %h
401  %i.4 = icmp ne i32 %i.2, %g
402  ret i1 %i.4
403}
404
405; PR2298
406define zeroext i1 @test22(i32 %a, i32 %b)  nounwind  {
407; CHECK-LABEL: @test22(
408; CHECK-NEXT:    [[I5:%.*]] = icmp eq i32 [[B:%.*]], [[A:%.*]]
409; CHECK-NEXT:    ret i1 [[I5]]
410;
411  %i2 = sub i32 0, %a
412  %i4 = sub i32 0, %b
413  %i5 = icmp eq i32 %i2, %i4
414  ret i1 %i5
415}
416
417define i32 @test26(i32 %x) {
418; CHECK-LABEL: @test26(
419; CHECK-NEXT:    [[SHL_NEG:%.*]] = shl i32 -3, [[X:%.*]]
420; CHECK-NEXT:    ret i32 [[SHL_NEG]]
421;
422  %shl = shl i32 3, %x
423  %neg = sub i32 0, %shl
424  ret i32 %neg
425}
426
427define i64 @test_neg_shl_sub(i64 %a, i64 %b) {
428; CHECK-LABEL: @test_neg_shl_sub(
429; CHECK-NEXT:    [[SUB_NEG:%.*]] = sub i64 [[B:%.*]], [[A:%.*]]
430; CHECK-NEXT:    [[MUL_NEG:%.*]] = shl i64 [[SUB_NEG]], 2
431; CHECK-NEXT:    ret i64 [[MUL_NEG]]
432;
433  %sub = sub i64 %a, %b
434  %mul = shl i64 %sub, 2
435  %neg = sub i64 0, %mul
436  ret i64 %neg
437}
438
439define i64 @test_neg_shl_sub_extra_use1(i64 %a, i64 %b, ptr %p) {
440; CHECK-LABEL: @test_neg_shl_sub_extra_use1(
441; CHECK-NEXT:    [[SUB:%.*]] = sub i64 [[A:%.*]], [[B:%.*]]
442; CHECK-NEXT:    store i64 [[SUB]], ptr [[P:%.*]], align 8
443; CHECK-NEXT:    [[MUL_NEG:%.*]] = mul i64 [[SUB]], -4
444; CHECK-NEXT:    ret i64 [[MUL_NEG]]
445;
446  %sub = sub i64 %a, %b
447  store i64 %sub, ptr %p
448  %mul = shl i64 %sub, 2
449  %neg = sub i64 0, %mul
450  ret i64 %neg
451}
452
453define i64 @test_neg_shl_sub_extra_use2(i64 %a, i64 %b, ptr %p) {
454; CHECK-LABEL: @test_neg_shl_sub_extra_use2(
455; CHECK-NEXT:    [[SUB:%.*]] = sub i64 [[A:%.*]], [[B:%.*]]
456; CHECK-NEXT:    [[MUL:%.*]] = shl i64 [[SUB]], 2
457; CHECK-NEXT:    store i64 [[MUL]], ptr [[P:%.*]], align 8
458; CHECK-NEXT:    [[NEG:%.*]] = sub i64 0, [[MUL]]
459; CHECK-NEXT:    ret i64 [[NEG]]
460;
461  %sub = sub i64 %a, %b
462  %mul = shl i64 %sub, 2
463  store i64 %mul, ptr %p
464  %neg = sub i64 0, %mul
465  ret i64 %neg
466}
467
468define i64 @test_neg_shl_div(i64 %a) {
469; CHECK-LABEL: @test_neg_shl_div(
470; CHECK-NEXT:    [[DIV_NEG:%.*]] = sdiv i64 [[A:%.*]], -3
471; CHECK-NEXT:    [[SHL_NEG:%.*]] = shl i64 [[DIV_NEG]], 2
472; CHECK-NEXT:    ret i64 [[SHL_NEG]]
473;
474  %div = sdiv i64 %a, 3
475  %shl = shl i64 %div, 2
476  %neg = sub i64 0, %shl
477  ret i64 %neg
478}
479
480define i64 @test_neg_shl_zext_i1(i1 %a, i64 %b) {
481; CHECK-LABEL: @test_neg_shl_zext_i1(
482; CHECK-NEXT:    [[EXT_NEG:%.*]] = sext i1 [[A:%.*]] to i64
483; CHECK-NEXT:    [[SHL_NEG:%.*]] = shl nsw i64 [[EXT_NEG]], [[B:%.*]]
484; CHECK-NEXT:    ret i64 [[SHL_NEG]]
485;
486  %ext = zext i1 %a to i64
487  %shl = shl i64 %ext, %b
488  %neg = sub i64 0, %shl
489  ret i64 %neg
490}
491
492define i64 @test_neg_shl_sext_i1(i1 %a, i64 %b) {
493; CHECK-LABEL: @test_neg_shl_sext_i1(
494; CHECK-NEXT:    [[EXT_NEG:%.*]] = zext i1 [[A:%.*]] to i64
495; CHECK-NEXT:    [[SHL_NEG:%.*]] = shl nuw i64 [[EXT_NEG]], [[B:%.*]]
496; CHECK-NEXT:    ret i64 [[SHL_NEG]]
497;
498  %ext = sext i1 %a to i64
499  %shl = shl i64 %ext, %b
500  %neg = sub i64 0, %shl
501  ret i64 %neg
502}
503
504define i64 @test_neg_zext_i1_extra_use(i1 %a, i64 %b, ptr %p) {
505; CHECK-LABEL: @test_neg_zext_i1_extra_use(
506; CHECK-NEXT:    [[EXT_NEG:%.*]] = sext i1 [[A:%.*]] to i64
507; CHECK-NEXT:    [[EXT:%.*]] = zext i1 [[A]] to i64
508; CHECK-NEXT:    store i64 [[EXT]], ptr [[P:%.*]], align 8
509; CHECK-NEXT:    ret i64 [[EXT_NEG]]
510;
511  %ext = zext i1 %a to i64
512  %neg = sub i64 0, %ext
513  store i64 %ext, ptr %p
514  ret i64 %neg
515}
516
517define i64 @test_neg_sext_i1_extra_use(i1 %a, i64 %b, ptr %p) {
518; CHECK-LABEL: @test_neg_sext_i1_extra_use(
519; CHECK-NEXT:    [[EXT_NEG:%.*]] = zext i1 [[A:%.*]] to i64
520; CHECK-NEXT:    [[EXT:%.*]] = sext i1 [[A]] to i64
521; CHECK-NEXT:    store i64 [[EXT]], ptr [[P:%.*]], align 8
522; CHECK-NEXT:    ret i64 [[EXT_NEG]]
523;
524  %ext = sext i1 %a to i64
525  %neg = sub i64 0, %ext
526  store i64 %ext, ptr %p
527  ret i64 %neg
528}
529
530define i32 @test_neg_trunc_shl_sub(i64 %a, i64 %b) {
531; CHECK-LABEL: @test_neg_trunc_shl_sub(
532; CHECK-NEXT:    [[SUB_NEG:%.*]] = sub i64 [[B:%.*]], [[A:%.*]]
533; CHECK-NEXT:    [[SUB_TR_NEG:%.*]] = trunc i64 [[SUB_NEG]] to i32
534; CHECK-NEXT:    [[TRUNC_NEG:%.*]] = shl i32 [[SUB_TR_NEG]], 2
535; CHECK-NEXT:    ret i32 [[TRUNC_NEG]]
536;
537  %sub = sub i64 %a, %b
538  %shl = shl i64 %sub, 2
539  %trunc = trunc i64 %shl to i32
540  %neg = sub i32 0, %trunc
541  ret i32 %neg
542}
543
544define i32 @test_neg_trunc_shl_ashr(i64 %a, i64 %b) {
545; CHECK-LABEL: @test_neg_trunc_shl_ashr(
546; CHECK-NEXT:    [[SHR_NEG:%.*]] = lshr i64 [[A:%.*]], 63
547; CHECK-NEXT:    [[SHL_NEG:%.*]] = shl nuw i64 [[SHR_NEG]], [[B:%.*]]
548; CHECK-NEXT:    [[TRUNC_NEG:%.*]] = trunc i64 [[SHL_NEG]] to i32
549; CHECK-NEXT:    ret i32 [[TRUNC_NEG]]
550;
551  %shr = ashr i64 %a, 63
552  %shl = shl i64 %shr, %b
553  %trunc = trunc i64 %shl to i32
554  %neg = sub i32 0, %trunc
555  ret i32 %neg
556}
557
558define i32 @test_neg_trunc_shl_lshr(i64 %a, i64 %b) {
559; CHECK-LABEL: @test_neg_trunc_shl_lshr(
560; CHECK-NEXT:    [[SHR_NEG:%.*]] = ashr i64 [[A:%.*]], 63
561; CHECK-NEXT:    [[SHL_NEG:%.*]] = shl nsw i64 [[SHR_NEG]], [[B:%.*]]
562; CHECK-NEXT:    [[TRUNC_NEG:%.*]] = trunc i64 [[SHL_NEG]] to i32
563; CHECK-NEXT:    ret i32 [[TRUNC_NEG]]
564;
565  %shr = lshr i64 %a, 63
566  %shl = shl i64 %shr, %b
567  %trunc = trunc i64 %shl to i32
568  %neg = sub i32 0, %trunc
569  ret i32 %neg
570}
571
572define i64 @test_neg_mul_sub(i64 %a, i64 %b, i64 %c) {
573; CHECK-LABEL: @test_neg_mul_sub(
574; CHECK-NEXT:    [[SUB_NEG:%.*]] = sub i64 [[B:%.*]], [[A:%.*]]
575; CHECK-NEXT:    [[MUL_NEG:%.*]] = mul i64 [[SUB_NEG]], [[C:%.*]]
576; CHECK-NEXT:    ret i64 [[MUL_NEG]]
577;
578  %sub = sub i64 %a, %b
579  %mul = mul i64 %sub, %c
580  %neg = sub i64 0, %mul
581  ret i64 %neg
582}
583
584define i64 @test_neg_mul_sub_commuted(i64 %a, i64 %b, i64 %c) {
585; CHECK-LABEL: @test_neg_mul_sub_commuted(
586; CHECK-NEXT:    [[COMPLEX:%.*]] = mul i64 [[C:%.*]], [[C]]
587; CHECK-NEXT:    [[SUB_NEG:%.*]] = sub i64 [[B:%.*]], [[A:%.*]]
588; CHECK-NEXT:    [[MUL_NEG:%.*]] = mul i64 [[SUB_NEG]], [[COMPLEX]]
589; CHECK-NEXT:    ret i64 [[MUL_NEG]]
590;
591  %complex = mul i64 %c, %c
592  %sub = sub i64 %a, %b
593  %mul = mul i64 %complex, %sub
594  %neg = sub i64 0, %mul
595  ret i64 %neg
596}
597
598define i32 @test27(i32 %x, i32 %y) {
599; CHECK-LABEL: @test27(
600; CHECK-NEXT:    [[MUL_NEG:%.*]] = shl i32 [[Y:%.*]], 3
601; CHECK-NEXT:    [[SUB:%.*]] = add i32 [[MUL_NEG]], [[X:%.*]]
602; CHECK-NEXT:    ret i32 [[SUB]]
603;
604  %mul = mul i32 %y, -8
605  %sub = sub i32 %x, %mul
606  ret i32 %sub
607}
608
609define <2 x i32> @test27vec(<2 x i32> %x, <2 x i32> %y) {
610; CHECK-LABEL: @test27vec(
611; CHECK-NEXT:    [[MUL_NEG:%.*]] = mul <2 x i32> [[Y:%.*]], <i32 8, i32 6>
612; CHECK-NEXT:    [[SUB:%.*]] = add <2 x i32> [[MUL_NEG]], [[X:%.*]]
613; CHECK-NEXT:    ret <2 x i32> [[SUB]]
614;
615  %mul = mul <2 x i32> %y, <i32 -8, i32 -6>
616  %sub = sub <2 x i32> %x, %mul
617  ret <2 x i32> %sub
618}
619
620define <2 x i32> @test27vecsplat(<2 x i32> %x, <2 x i32> %y) {
621; CHECK-LABEL: @test27vecsplat(
622; CHECK-NEXT:    [[MUL_NEG:%.*]] = shl <2 x i32> [[Y:%.*]], splat (i32 3)
623; CHECK-NEXT:    [[SUB:%.*]] = add <2 x i32> [[MUL_NEG]], [[X:%.*]]
624; CHECK-NEXT:    ret <2 x i32> [[SUB]]
625;
626  %mul = mul <2 x i32> %y, <i32 -8, i32 -8>
627  %sub = sub <2 x i32> %x, %mul
628  ret <2 x i32> %sub
629}
630
631define <2 x i32> @test27vecmixed(<2 x i32> %x, <2 x i32> %y) {
632; CHECK-LABEL: @test27vecmixed(
633; CHECK-NEXT:    [[MUL_NEG:%.*]] = mul <2 x i32> [[Y:%.*]], <i32 8, i32 -8>
634; CHECK-NEXT:    [[SUB:%.*]] = add <2 x i32> [[MUL_NEG]], [[X:%.*]]
635; CHECK-NEXT:    ret <2 x i32> [[SUB]]
636;
637  %mul = mul <2 x i32> %y, <i32 -8, i32 8>
638  %sub = sub <2 x i32> %x, %mul
639  ret <2 x i32> %sub
640}
641
642define i32 @test27commuted(i32 %x, i32 %y) {
643; CHECK-LABEL: @test27commuted(
644; CHECK-NEXT:    [[MUL_NEG:%.*]] = shl i32 [[Y:%.*]], 3
645; CHECK-NEXT:    [[SUB:%.*]] = add i32 [[MUL_NEG]], [[X:%.*]]
646; CHECK-NEXT:    ret i32 [[SUB]]
647;
648  %mul = mul i32 -8, %y
649  %sub = sub i32 %x, %mul
650  ret i32 %sub
651}
652
653define <2 x i32> @test27commutedvec(<2 x i32> %x, <2 x i32> %y) {
654; CHECK-LABEL: @test27commutedvec(
655; CHECK-NEXT:    [[MUL_NEG:%.*]] = mul <2 x i32> [[Y:%.*]], <i32 8, i32 6>
656; CHECK-NEXT:    [[SUB:%.*]] = add <2 x i32> [[MUL_NEG]], [[X:%.*]]
657; CHECK-NEXT:    ret <2 x i32> [[SUB]]
658;
659  %mul = mul <2 x i32> <i32 -8, i32 -6>, %y
660  %sub = sub <2 x i32> %x, %mul
661  ret <2 x i32> %sub
662}
663
664define <2 x i32> @test27commutedvecsplat(<2 x i32> %x, <2 x i32> %y) {
665; CHECK-LABEL: @test27commutedvecsplat(
666; CHECK-NEXT:    [[MUL_NEG:%.*]] = shl <2 x i32> [[Y:%.*]], splat (i32 3)
667; CHECK-NEXT:    [[SUB:%.*]] = add <2 x i32> [[MUL_NEG]], [[X:%.*]]
668; CHECK-NEXT:    ret <2 x i32> [[SUB]]
669;
670  %mul = mul <2 x i32> <i32 -8, i32 -8>, %y
671  %sub = sub <2 x i32> %x, %mul
672  ret <2 x i32> %sub
673}
674
675define <2 x i32> @test27commutedvecmixed(<2 x i32> %x, <2 x i32> %y) {
676; CHECK-LABEL: @test27commutedvecmixed(
677; CHECK-NEXT:    [[MUL_NEG:%.*]] = mul <2 x i32> [[Y:%.*]], <i32 8, i32 -8>
678; CHECK-NEXT:    [[SUB:%.*]] = add <2 x i32> [[MUL_NEG]], [[X:%.*]]
679; CHECK-NEXT:    ret <2 x i32> [[SUB]]
680;
681  %mul = mul <2 x i32> <i32 -8, i32 8>, %y
682  %sub = sub <2 x i32> %x, %mul
683  ret <2 x i32> %sub
684}
685
686define i32 @test28(i32 %x, i32 %y, i32 %z) {
687; CHECK-LABEL: @test28(
688; CHECK-NEXT:    [[TMP1:%.*]] = mul i32 [[Z:%.*]], [[Y:%.*]]
689; CHECK-NEXT:    [[SUB:%.*]] = add i32 [[X:%.*]], [[TMP1]]
690; CHECK-NEXT:    ret i32 [[SUB]]
691;
692  %neg = sub i32 0, %z
693  %mul = mul i32 %neg, %y
694  %sub = sub i32 %x, %mul
695  ret i32 %sub
696}
697
698define i32 @test28commuted(i32 %x, i32 %y, i32 %z) {
699; CHECK-LABEL: @test28commuted(
700; CHECK-NEXT:    [[TMP1:%.*]] = mul i32 [[Z:%.*]], [[Y:%.*]]
701; CHECK-NEXT:    [[SUB:%.*]] = add i32 [[X:%.*]], [[TMP1]]
702; CHECK-NEXT:    ret i32 [[SUB]]
703;
704  %neg = sub i32 0, %z
705  %mul = mul i32 %y, %neg
706  %sub = sub i32 %x, %mul
707  ret i32 %sub
708}
709
710define <2 x i64> @test31(<2 x i64> %A) {
711; CHECK-LABEL: @test31(
712; CHECK-NEXT:    [[SUB:%.*]] = add <2 x i64> [[A:%.*]], <i64 3, i64 4>
713; CHECK-NEXT:    ret <2 x i64> [[SUB]]
714;
715  %xor = xor <2 x i64> %A, <i64 -1, i64 -1>
716  %sub = sub <2 x i64> <i64 2, i64 3>, %xor
717  ret <2 x i64> %sub
718}
719
720define <2 x i64> @test32(<2 x i64> %A) {
721; CHECK-LABEL: @test32(
722; CHECK-NEXT:    [[SUB:%.*]] = sub <2 x i64> <i64 3, i64 4>, [[A:%.*]]
723; CHECK-NEXT:    ret <2 x i64> [[SUB]]
724;
725  %add = add <2 x i64> %A, <i64 -1, i64 -1>
726  %sub = sub <2 x i64> <i64 2, i64 3>, %add
727  ret <2 x i64> %sub
728}
729
730define <2 x i64> @test35(<2 x i64> %A) {
731; CHECK-LABEL: @test35(
732; CHECK-NEXT:    [[SUB:%.*]] = mul <2 x i64> [[A:%.*]], <i64 -2, i64 -3>
733; CHECK-NEXT:    ret <2 x i64> [[SUB]]
734;
735  %mul = mul <2 x i64> %A, <i64 3, i64 4>
736  %sub = sub <2 x i64> %A, %mul
737  ret <2 x i64> %sub
738}
739
740define <2 x i64> @test36(<2 x i64> %A) {
741; CHECK-LABEL: @test36(
742; CHECK-NEXT:    [[SUB:%.*]] = mul <2 x i64> [[A:%.*]], <i64 7, i64 15>
743; CHECK-NEXT:    ret <2 x i64> [[SUB]]
744;
745  %shl = shl <2 x i64> %A, <i64 3, i64 4>
746  %sub = sub <2 x i64> %shl, %A
747  ret <2 x i64> %sub
748}
749
750define <2 x i32> @test37(<2 x i32> %A) {
751; CHECK-LABEL: @test37(
752; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq <2 x i32> [[A:%.*]], splat (i32 -2147483648)
753; CHECK-NEXT:    [[DIV_NEG:%.*]] = sext <2 x i1> [[TMP1]] to <2 x i32>
754; CHECK-NEXT:    ret <2 x i32> [[DIV_NEG]]
755;
756  %div = sdiv <2 x i32> %A, <i32 -2147483648, i32 -2147483648>
757  %sub = sub nsw <2 x i32> zeroinitializer, %div
758  ret <2 x i32> %sub
759}
760
761define i32 @test38(i32 %A) {
762; CHECK-LABEL: @test38(
763; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i32 [[A:%.*]], -2147483648
764; CHECK-NEXT:    [[DIV_NEG:%.*]] = sext i1 [[TMP1]] to i32
765; CHECK-NEXT:    ret i32 [[DIV_NEG]]
766;
767  %div = sdiv i32 %A, -2147483648
768  %sub = sub nsw i32 0, %div
769  ret i32 %sub
770}
771
772define i16 @test40(i16 %a, i16 %b) {
773; CHECK-LABEL: @test40(
774; CHECK-NEXT:    [[ASHR:%.*]] = ashr i16 [[A:%.*]], 1
775; CHECK-NEXT:    [[ASHR1:%.*]] = ashr i16 [[B:%.*]], 1
776; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i16 [[ASHR]], [[ASHR1]]
777; CHECK-NEXT:    ret i16 [[SUB]]
778;
779  %ashr = ashr i16 %a, 1
780  %ashr1 = ashr i16 %b, 1
781  %sub = sub i16 %ashr, %ashr1
782  ret i16 %sub
783}
784
785define i32 @test41(i16 %a, i16 %b) {
786; CHECK-LABEL: @test41(
787; CHECK-NEXT:    [[CONV:%.*]] = sext i16 [[A:%.*]] to i32
788; CHECK-NEXT:    [[CONV1:%.*]] = sext i16 [[B:%.*]] to i32
789; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 [[CONV]], [[CONV1]]
790; CHECK-NEXT:    ret i32 [[SUB]]
791;
792  %conv = sext i16 %a to i32
793  %conv1 = sext i16 %b to i32
794  %sub = sub i32 %conv, %conv1
795  ret i32 %sub
796}
797
798define i4 @test42(i4 %x, i4 %y) {
799; CHECK-LABEL: @test42(
800; CHECK-NEXT:    [[A:%.*]] = and i4 [[Y:%.*]], 7
801; CHECK-NEXT:    [[B:%.*]] = and i4 [[X:%.*]], 7
802; CHECK-NEXT:    [[C:%.*]] = sub nsw i4 [[A]], [[B]]
803; CHECK-NEXT:    ret i4 [[C]]
804;
805  %a = and i4 %y, 7
806  %b = and i4 %x, 7
807  %c = sub i4 %a, %b
808  ret i4 %c
809}
810
811define i4 @test43(i4 %x, i4 %y) {
812; CHECK-LABEL: @test43(
813; CHECK-NEXT:    [[A:%.*]] = or i4 [[X:%.*]], -8
814; CHECK-NEXT:    [[B:%.*]] = and i4 [[Y:%.*]], 7
815; CHECK-NEXT:    [[C:%.*]] = sub nuw i4 [[A]], [[B]]
816; CHECK-NEXT:    ret i4 [[C]]
817;
818  %a = or i4 %x, -8
819  %b = and i4 %y, 7
820  %c = sub i4 %a, %b
821  ret i4 %c
822}
823
824define i32 @test44(i32 %x) {
825; CHECK-LABEL: @test44(
826; CHECK-NEXT:    [[SUB:%.*]] = add nsw i32 [[X:%.*]], -32768
827; CHECK-NEXT:    ret i32 [[SUB]]
828;
829  %sub = sub nsw i32 %x, 32768
830  ret i32 %sub
831}
832
833define <2 x i32> @test44vec(<2 x i32> %x) {
834; CHECK-LABEL: @test44vec(
835; CHECK-NEXT:    [[SUB:%.*]] = add nsw <2 x i32> [[X:%.*]], splat (i32 -32768)
836; CHECK-NEXT:    ret <2 x i32> [[SUB]]
837;
838  %sub = sub nsw <2 x i32> %x, <i32 32768, i32 32768>
839  ret <2 x i32> %sub
840}
841
842define <vscale x 2 x i32> @test44scalablevec(<vscale x 2 x i32> %x) {
843; CHECK-LABEL: @test44scalablevec(
844; CHECK-NEXT:    [[SUB:%.*]] = add nsw <vscale x 2 x i32> [[X:%.*]], splat (i32 -32768)
845; CHECK-NEXT:    ret <vscale x 2 x i32> [[SUB]]
846;
847  %sub = sub nsw <vscale x 2 x i32> %x, splat (i32 32768)
848  ret <vscale x 2 x i32> %sub
849}
850
851define <2 x i16> @test44vecminval(<2 x i16> %x) {
852; CHECK-LABEL: @test44vecminval(
853; CHECK-NEXT:    [[SUB:%.*]] = xor <2 x i16> [[X:%.*]], splat (i16 -32768)
854; CHECK-NEXT:    ret <2 x i16> [[SUB]]
855;
856  %sub = sub nsw <2 x i16> %x, <i16 -32768, i16 -32768>
857  ret <2 x i16> %sub
858}
859
860; FIXME: This isn't combined to xor as above because the pattern in visitSub
861; uses m_ImmConstant which matches Constant but (explicitly) not ConstantExpr.
862define <vscale x 2 x i16> @test44scalablevecminval(<vscale x 2 x i16> %x) {
863; CHECK-LABEL: @test44scalablevecminval(
864; CHECK-NEXT:    [[SUB:%.*]] = add <vscale x 2 x i16> [[X:%.*]], splat (i16 -32768)
865; CHECK-NEXT:    ret <vscale x 2 x i16> [[SUB]]
866;
867  %sub = sub nsw <vscale x 2 x i16> %x, splat (i16 -32768)
868  ret <vscale x 2 x i16> %sub
869}
870
871define i32 @test45(i32 %x, i32 %y) {
872; CHECK-LABEL: @test45(
873; CHECK-NEXT:    [[SUB:%.*]] = and i32 [[X:%.*]], [[Y:%.*]]
874; CHECK-NEXT:    ret i32 [[SUB]]
875;
876  %or = or i32 %x, %y
877  %xor = xor i32 %x, %y
878  %sub = sub i32 %or, %xor
879  ret i32 %sub
880}
881
882define i32 @test45commuted(i32 %x, i32 %y) {
883; CHECK-LABEL: @test45commuted(
884; CHECK-NEXT:    [[SUB:%.*]] = and i32 [[Y:%.*]], [[X:%.*]]
885; CHECK-NEXT:    ret i32 [[SUB]]
886;
887  %or = or i32 %x, %y
888  %xor = xor i32 %y, %x
889  %sub = sub i32 %or, %xor
890  ret i32 %sub
891}
892
893define i32 @test46(i32 %x, i32 %y) {
894; CHECK-LABEL: @test46(
895; CHECK-NEXT:    [[X_NOT:%.*]] = xor i32 [[X:%.*]], -1
896; CHECK-NEXT:    [[SUB:%.*]] = and i32 [[Y:%.*]], [[X_NOT]]
897; CHECK-NEXT:    ret i32 [[SUB]]
898;
899  %or = or i32 %x, %y
900  %sub = sub i32 %or, %x
901  ret i32 %sub
902}
903
904define i32 @test46commuted(i32 %x, i32 %y) {
905; CHECK-LABEL: @test46commuted(
906; CHECK-NEXT:    [[X_NOT:%.*]] = xor i32 [[X:%.*]], -1
907; CHECK-NEXT:    [[SUB:%.*]] = and i32 [[Y:%.*]], [[X_NOT]]
908; CHECK-NEXT:    ret i32 [[SUB]]
909;
910  %or = or i32 %y, %x
911  %sub = sub i32 %or, %x
912  ret i32 %sub
913}
914
915define i32 @test47(i1 %A, i32 %B, i32 %C, i32 %D) {
916; CHECK-LABEL: @test47(
917; CHECK-NEXT:    [[TMP1:%.*]] = sub i32 [[D:%.*]], [[C:%.*]]
918; CHECK-NEXT:    [[SUB:%.*]] = select i1 [[A:%.*]], i32 [[TMP1]], i32 0
919; CHECK-NEXT:    ret i32 [[SUB]]
920;
921  %sel0 = select i1 %A, i32 %D, i32 %B
922  %sel1 = select i1 %A, i32 %C, i32 %B
923  %sub = sub i32 %sel0, %sel1
924  ret i32 %sub
925}
926
927define i32 @test48(i1 %A, i32 %B, i32 %C, i32 %D) {
928; CHECK-LABEL: @test48(
929; CHECK-NEXT:    [[TMP1:%.*]] = sub i32 [[D:%.*]], [[C:%.*]]
930; CHECK-NEXT:    [[SUB:%.*]] = select i1 [[A:%.*]], i32 0, i32 [[TMP1]]
931; CHECK-NEXT:    ret i32 [[SUB]]
932;
933  %sel0 = select i1 %A, i32 %B, i32 %D
934  %sel1 = select i1 %A, i32 %B, i32 %C
935  %sub = sub i32 %sel0, %sel1
936  ret i32 %sub
937}
938
939define i32 @test49(i32 %X) {
940; CHECK-LABEL: @test49(
941; CHECK-NEXT:    [[SUB:%.*]] = sub i32 1, [[X:%.*]]
942; CHECK-NEXT:    [[RES:%.*]] = and i32 [[SUB]], 64
943; CHECK-NEXT:    ret i32 [[RES]]
944;
945  %sub = sub i32 129, %X
946  %res = and i32 %sub, 64
947  ret i32 %res
948}
949
950define i32 @test50(i32 %X) {
951; CHECK-LABEL: @test50(
952; CHECK-NEXT:    [[SUB:%.*]] = sub i32 1, [[X:%.*]]
953; CHECK-NEXT:    [[RES:%.*]] = and i32 [[SUB]], 127
954; CHECK-NEXT:    ret i32 [[RES]]
955;
956  %sub = sub i32 129, %X
957  %res = and i32 %sub, 127
958  ret i32 %res
959}
960
961define i32 @test51(i32 %X) {
962; CHECK-LABEL: @test51(
963; CHECK-NEXT:    [[SUB:%.*]] = sub i32 126, [[X:%.*]]
964; CHECK-NEXT:    [[RES:%.*]] = and i32 [[SUB]], 64
965; CHECK-NEXT:    ret i32 [[RES]]
966;
967  %sub = sub i32 254, %X
968  %res = and i32 %sub, 64
969  ret i32 %res
970}
971
972define i32 @test52(i32 %X) {
973; CHECK-LABEL: @test52(
974; CHECK-NEXT:    [[SUB:%.*]] = sub i32 126, [[X:%.*]]
975; CHECK-NEXT:    [[RES:%.*]] = and i32 [[SUB]], 127
976; CHECK-NEXT:    ret i32 [[RES]]
977;
978  %sub = sub i32 254, %X
979  %res = and i32 %sub, 127
980  ret i32 %res
981}
982
983define <2 x i1> @test53(<2 x i1> %A, <2 x i1> %B) {
984; CHECK-LABEL: @test53(
985; CHECK-NEXT:    [[SUB:%.*]] = xor <2 x i1> [[B:%.*]], [[A:%.*]]
986; CHECK-NEXT:    ret <2 x i1> [[SUB]]
987;
988  %sub = sub <2 x i1> %A, %B
989  ret <2 x i1> %sub
990}
991
992define i32 @test54(i1 %C) {
993; CHECK-LABEL: @test54(
994; CHECK-NEXT:    [[V:%.*]] = select i1 [[C:%.*]], i32 -877, i32 113
995; CHECK-NEXT:    ret i32 [[V]]
996;
997  %A = select i1 %C, i32 1000, i32 10
998  %V = sub i32 123, %A
999  ret i32 %V
1000}
1001
1002define <2 x i32> @test54vec(i1 %C) {
1003; CHECK-LABEL: @test54vec(
1004; CHECK-NEXT:    [[V:%.*]] = select i1 [[C:%.*]], <2 x i32> splat (i32 -877), <2 x i32> splat (i32 113)
1005; CHECK-NEXT:    ret <2 x i32> [[V]]
1006;
1007  %A = select i1 %C, <2 x i32> <i32 1000, i32 1000>, <2 x i32> <i32 10, i32 10>
1008  %V = sub <2 x i32> <i32 123, i32 123>, %A
1009  ret <2 x i32> %V
1010}
1011
1012define <2 x i32> @test54vec2(i1 %C) {
1013; CHECK-LABEL: @test54vec2(
1014; CHECK-NEXT:    [[V:%.*]] = select i1 [[C:%.*]], <2 x i32> <i32 -877, i32 -2167>, <2 x i32> <i32 113, i32 303>
1015; CHECK-NEXT:    ret <2 x i32> [[V]]
1016;
1017  %A = select i1 %C, <2 x i32> <i32 1000, i32 2500>, <2 x i32> <i32 10, i32 30>
1018  %V = sub <2 x i32> <i32 123, i32 333>, %A
1019  ret <2 x i32> %V
1020}
1021
1022define i32 @test55(i1 %which) {
1023; CHECK-LABEL: @test55(
1024; CHECK-NEXT:  entry:
1025; CHECK-NEXT:    br i1 [[WHICH:%.*]], label [[FINAL:%.*]], label [[DELAY:%.*]]
1026; CHECK:       delay:
1027; CHECK-NEXT:    br label [[FINAL]]
1028; CHECK:       final:
1029; CHECK-NEXT:    [[A_NEG:%.*]] = phi i32 [ -877, [[ENTRY:%.*]] ], [ 113, [[DELAY]] ]
1030; CHECK-NEXT:    ret i32 [[A_NEG]]
1031;
1032entry:
1033  br i1 %which, label %final, label %delay
1034
1035delay:
1036  br label %final
1037
1038final:
1039  %A = phi i32 [ 1000, %entry ], [ 10, %delay ]
1040  %value = sub i32 123, %A
1041  ret i32 %value
1042}
1043
1044define <2 x i32> @test55vec(i1 %which) {
1045; CHECK-LABEL: @test55vec(
1046; CHECK-NEXT:  entry:
1047; CHECK-NEXT:    br i1 [[WHICH:%.*]], label [[FINAL:%.*]], label [[DELAY:%.*]]
1048; CHECK:       delay:
1049; CHECK-NEXT:    br label [[FINAL]]
1050; CHECK:       final:
1051; CHECK-NEXT:    [[A_NEG:%.*]] = phi <2 x i32> [ splat (i32 -877), [[ENTRY:%.*]] ], [ splat (i32 113), [[DELAY]] ]
1052; CHECK-NEXT:    ret <2 x i32> [[A_NEG]]
1053;
1054entry:
1055  br i1 %which, label %final, label %delay
1056
1057delay:
1058  br label %final
1059
1060final:
1061  %A = phi <2 x i32> [ <i32 1000, i32 1000>, %entry ], [ <i32 10, i32 10>, %delay ]
1062  %value = sub <2 x i32> <i32 123, i32 123>, %A
1063  ret <2 x i32> %value
1064}
1065
1066define <2 x i32> @test55vec2(i1 %which) {
1067; CHECK-LABEL: @test55vec2(
1068; CHECK-NEXT:  entry:
1069; CHECK-NEXT:    br i1 [[WHICH:%.*]], label [[FINAL:%.*]], label [[DELAY:%.*]]
1070; CHECK:       delay:
1071; CHECK-NEXT:    br label [[FINAL]]
1072; CHECK:       final:
1073; CHECK-NEXT:    [[A_NEG:%.*]] = phi <2 x i32> [ <i32 -877, i32 -2167>, [[ENTRY:%.*]] ], [ <i32 113, i32 303>, [[DELAY]] ]
1074; CHECK-NEXT:    ret <2 x i32> [[A_NEG]]
1075;
1076entry:
1077  br i1 %which, label %final, label %delay
1078
1079delay:
1080  br label %final
1081
1082final:
1083  %A = phi <2 x i32> [ <i32 1000, i32 2500>, %entry ], [ <i32 10, i32 30>, %delay ]
1084  %value = sub <2 x i32> <i32 123, i32 333>, %A
1085  ret <2 x i32> %value
1086}
1087
1088define i32 @test56(i32 %A, i32 %B) {
1089; CHECK-LABEL: @test56(
1090; CHECK-NEXT:    [[Y:%.*]] = sub i32 0, [[B:%.*]]
1091; CHECK-NEXT:    ret i32 [[Y]]
1092;
1093  %X = add i32 %A, %B
1094  %Y = sub i32 %A, %X
1095  ret i32 %Y
1096}
1097
1098define i32 @test57(i32 %A, i32 %B) {
1099; CHECK-LABEL: @test57(
1100; CHECK-NEXT:    [[Y:%.*]] = sub i32 0, [[B:%.*]]
1101; CHECK-NEXT:    ret i32 [[Y]]
1102;
1103  %X = add i32 %B, %A
1104  %Y = sub i32 %A, %X
1105  ret i32 %Y
1106}
1107
1108@dummy_global1 = external global ptr
1109@dummy_global2 = external global ptr
1110
1111define i64 @test58(ptr %foo, i64 %i, i64 %j) {
1112; CHECK-LABEL: @test58(
1113; CHECK-NEXT:    [[GEPDIFF:%.*]] = sub i64 [[I:%.*]], [[J:%.*]]
1114; CHECK-NEXT:    ret i64 [[GEPDIFF]]
1115;
1116  %gep1 = getelementptr inbounds [100 x [100 x i8]], ptr %foo, i64 0, i64 42, i64 %i
1117  %gep2 = getelementptr inbounds [100 x [100 x i8]], ptr %foo, i64 0, i64 42, i64 %j
1118  %cast1 = ptrtoint ptr %gep1 to i64
1119  %cast2 = ptrtoint ptr %gep2 to i64
1120  %sub = sub i64 %cast1, %cast2
1121  ret i64 %sub
1122}
1123
1124define i64 @test59(ptr %foo, i64 %i) {
1125; CHECK-LABEL: @test59(
1126; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr i8, ptr [[FOO:%.*]], i64 [[I:%.*]]
1127; CHECK-NEXT:    [[GEP1:%.*]] = getelementptr i8, ptr [[TMP1]], i64 4200
1128; CHECK-NEXT:    [[GEP2:%.*]] = getelementptr inbounds nuw i8, ptr [[FOO]], i64 4200
1129; CHECK-NEXT:    store ptr [[GEP1]], ptr @dummy_global1, align 8
1130; CHECK-NEXT:    store ptr [[GEP2]], ptr @dummy_global2, align 8
1131; CHECK-NEXT:    ret i64 [[I]]
1132;
1133; gep1 and gep2 have more than one uses
1134  %gep1 = getelementptr inbounds [100 x [100 x i8]], ptr %foo, i64 0, i64 42, i64 %i
1135  %gep2 = getelementptr inbounds [100 x [100 x i8]], ptr %foo, i64 0, i64 42, i64 0
1136  %cast1 = ptrtoint ptr %gep1 to i64
1137  %cast2 = ptrtoint ptr %gep2 to i64
1138  %sub = sub i64 %cast1, %cast2
1139  store ptr %gep1, ptr @dummy_global1
1140  store ptr %gep2, ptr @dummy_global2
1141  ret i64 %sub
1142}
1143
1144define i64 @test60(ptr %foo, i64 %i, i64 %j) {
1145; CHECK-LABEL: @test60(
1146; CHECK-NEXT:    [[GEP1_IDX:%.*]] = mul nsw i64 [[J:%.*]], 100
1147; CHECK-NEXT:    [[GEP1_OFFS:%.*]] = add nsw i64 [[GEP1_IDX]], [[I:%.*]]
1148; CHECK-NEXT:    [[GEP1:%.*]] = getelementptr inbounds i8, ptr [[FOO:%.*]], i64 [[GEP1_OFFS]]
1149; CHECK-NEXT:    [[GEPDIFF:%.*]] = add nsw i64 [[GEP1_OFFS]], -4200
1150; CHECK-NEXT:    store ptr [[GEP1]], ptr @dummy_global1, align 8
1151; CHECK-NEXT:    ret i64 [[GEPDIFF]]
1152;
1153; gep1 has a non-constant index and more than one uses. Shouldn't duplicate the arithmetic.
1154  %gep1 = getelementptr inbounds [100 x [100 x i8]], ptr %foo, i64 0, i64 %j, i64 %i
1155  %gep2 = getelementptr inbounds [100 x [100 x i8]], ptr %foo, i64 0, i64 42, i64 0
1156  %cast1 = ptrtoint ptr %gep1 to i64
1157  %cast2 = ptrtoint ptr %gep2 to i64
1158  %sub = sub i64 %cast1, %cast2
1159  store ptr %gep1, ptr @dummy_global1
1160  ret i64 %sub
1161}
1162
1163define i64 @test60_nuw(ptr %foo, i64 %i, i64 %j) {
1164; CHECK-LABEL: @test60_nuw(
1165; CHECK-NEXT:    [[GEP1_IDX:%.*]] = mul nuw i64 [[J:%.*]], 100
1166; CHECK-NEXT:    [[GEP1_OFFS:%.*]] = add nuw i64 [[GEP1_IDX]], [[I:%.*]]
1167; CHECK-NEXT:    [[GEP1:%.*]] = getelementptr nuw i8, ptr [[FOO:%.*]], i64 [[GEP1_OFFS]]
1168; CHECK-NEXT:    [[GEPDIFF:%.*]] = add i64 [[GEP1_OFFS]], -4200
1169; CHECK-NEXT:    store ptr [[GEP1]], ptr @dummy_global1, align 8
1170; CHECK-NEXT:    ret i64 [[GEPDIFF]]
1171;
1172  %gep1 = getelementptr nuw [100 x [100 x i8]], ptr %foo, i64 0, i64 %j, i64 %i
1173  %gep2 = getelementptr nuw [100 x [100 x i8]], ptr %foo, i64 0, i64 42, i64 0
1174  %cast1 = ptrtoint ptr %gep1 to i64
1175  %cast2 = ptrtoint ptr %gep2 to i64
1176  %sub = sub i64 %cast1, %cast2
1177  store ptr %gep1, ptr @dummy_global1
1178  ret i64 %sub
1179}
1180
1181define i64 @test61(ptr %foo, i64 %i, i64 %j) {
1182; CHECK-LABEL: @test61(
1183; CHECK-NEXT:    [[GEP2_IDX:%.*]] = mul nsw i64 [[J:%.*]], 100
1184; CHECK-NEXT:    [[GEP2_OFFS:%.*]] = add nsw i64 [[GEP2_IDX]], [[I:%.*]]
1185; CHECK-NEXT:    [[GEP2:%.*]] = getelementptr inbounds i8, ptr [[FOO:%.*]], i64 [[GEP2_OFFS]]
1186; CHECK-NEXT:    [[GEPDIFF:%.*]] = sub nsw i64 4200, [[GEP2_OFFS]]
1187; CHECK-NEXT:    store ptr [[GEP2]], ptr @dummy_global2, align 8
1188; CHECK-NEXT:    ret i64 [[GEPDIFF]]
1189;
1190; gep2 has a non-constant index and more than one uses. Shouldn't duplicate the arithmetic.
1191  %gep1 = getelementptr inbounds [100 x [100 x i8]], ptr %foo, i64 0, i64 42, i64 0
1192  %gep2 = getelementptr inbounds [100 x [100 x i8]], ptr %foo, i64 0, i64 %j, i64 %i
1193  %cast1 = ptrtoint ptr %gep1 to i64
1194  %cast2 = ptrtoint ptr %gep2 to i64
1195  %sub = sub i64 %cast1, %cast2
1196  store ptr %gep2, ptr @dummy_global2
1197  ret i64 %sub
1198}
1199
1200declare void @use.ptr(ptr)
1201
1202define i64 @test_sub_ptradd_multiuse(ptr %p, i64 %idx1, i64 %idx2) {
1203; CHECK-LABEL: @test_sub_ptradd_multiuse(
1204; CHECK-NEXT:    [[P1:%.*]] = getelementptr inbounds i8, ptr [[P:%.*]], i64 [[IDX1:%.*]]
1205; CHECK-NEXT:    call void @use.ptr(ptr [[P1]])
1206; CHECK-NEXT:    [[GEPDIFF:%.*]] = sub nsw i64 [[IDX1]], [[IDX2:%.*]]
1207; CHECK-NEXT:    ret i64 [[GEPDIFF]]
1208;
1209  %p1 = getelementptr inbounds i8, ptr %p, i64 %idx1
1210  call void @use.ptr(ptr %p1)
1211  %p2 = getelementptr inbounds i8, ptr %p, i64 %idx2
1212  %p1.int = ptrtoint ptr %p1 to i64
1213  %p2.int = ptrtoint ptr %p2 to i64
1214  %sub = sub i64 %p1.int, %p2.int
1215  ret i64 %sub
1216}
1217
1218define i32 @test62(i32 %A) {
1219; CHECK-LABEL: @test62(
1220; CHECK-NEXT:    [[TMP1:%.*]] = shl i32 [[A:%.*]], 1
1221; CHECK-NEXT:    [[C:%.*]] = sub i32 2, [[TMP1]]
1222; CHECK-NEXT:    ret i32 [[C]]
1223;
1224  %B = sub i32 1, %A
1225  %C = shl i32 %B, 1
1226  ret i32 %C
1227}
1228
1229define <2 x i32> @test62vec(<2 x i32> %A) {
1230; CHECK-LABEL: @test62vec(
1231; CHECK-NEXT:    [[TMP1:%.*]] = shl <2 x i32> [[A:%.*]], splat (i32 1)
1232; CHECK-NEXT:    [[C:%.*]] = sub <2 x i32> splat (i32 2), [[TMP1]]
1233; CHECK-NEXT:    ret <2 x i32> [[C]]
1234;
1235  %B = sub <2 x i32> <i32 1, i32 1>, %A
1236  %C = shl <2 x i32> %B, <i32 1, i32 1>
1237  ret <2 x i32> %C
1238}
1239
1240define i32 @test63(i32 %A) {
1241; CHECK-LABEL: @test63(
1242; CHECK-NEXT:    [[TMP1:%.*]] = shl i32 [[A:%.*]], 1
1243; CHECK-NEXT:    ret i32 [[TMP1]]
1244;
1245  %B = sub i32 1, %A
1246  %C = shl i32 %B, 1
1247  %D = sub i32 2, %C
1248  ret i32 %D
1249}
1250
1251define <2 x i32> @test63vec(<2 x i32> %A) {
1252; CHECK-LABEL: @test63vec(
1253; CHECK-NEXT:    [[TMP1:%.*]] = shl <2 x i32> [[A:%.*]], splat (i32 1)
1254; CHECK-NEXT:    ret <2 x i32> [[TMP1]]
1255;
1256  %B = sub <2 x i32> <i32 1, i32 1>, %A
1257  %C = shl <2 x i32> %B, <i32 1, i32 1>
1258  %D = sub <2 x i32> <i32 2, i32 2>, %C
1259  ret <2 x i32> %D
1260}
1261
1262define i32 @test64(i32 %x) {
1263; CHECK-LABEL: @test64(
1264; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.smin.i32(i32 [[X:%.*]], i32 255)
1265; CHECK-NEXT:    [[DOTNEG:%.*]] = add nsw i32 [[TMP1]], 1
1266; CHECK-NEXT:    ret i32 [[DOTNEG]]
1267;
1268  %1 = xor i32 %x, -1
1269  %2 = icmp sgt i32 %1, -256
1270  %3 = select i1 %2, i32 %1, i32 -256
1271  %res = sub i32 0, %3
1272  ret i32 %res
1273}
1274
1275define i32 @test65(i32 %x) {
1276; CHECK-LABEL: @test65(
1277; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.smax.i32(i32 [[X:%.*]], i32 -256)
1278; CHECK-NEXT:    [[DOTNEG:%.*]] = add i32 [[TMP1]], 1
1279; CHECK-NEXT:    ret i32 [[DOTNEG]]
1280;
1281  %1 = xor i32 %x, -1
1282  %2 = icmp slt i32 %1, 255
1283  %3 = select i1 %2, i32 %1, i32 255
1284  %res = sub i32 0, %3
1285  ret i32 %res
1286}
1287
1288define i32 @test66(i32 %x) {
1289; CHECK-LABEL: @test66(
1290; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.umin.i32(i32 [[X:%.*]], i32 -101)
1291; CHECK-NEXT:    [[DOTNEG:%.*]] = add nuw i32 [[TMP1]], 1
1292; CHECK-NEXT:    ret i32 [[DOTNEG]]
1293;
1294  %1 = xor i32 %x, -1
1295  %2 = icmp ugt i32 %1, 100
1296  %3 = select i1 %2, i32 %1, i32 100
1297  %res = sub i32 0, %3
1298  ret i32 %res
1299}
1300
1301define i32 @test67(i32 %x) {
1302; CHECK-LABEL: @test67(
1303; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.umax.i32(i32 [[X:%.*]], i32 100)
1304; CHECK-NEXT:    [[DOTNEG:%.*]] = add i32 [[TMP1]], 1
1305; CHECK-NEXT:    ret i32 [[DOTNEG]]
1306;
1307  %1 = xor i32 %x, -1
1308  %2 = icmp ult i32 %1, -101
1309  %3 = select i1 %2, i32 %1, i32 -101
1310  %res = sub i32 0, %3
1311  ret i32 %res
1312}
1313
1314; Check splat vectors too
1315define <2 x i32> @test68(<2 x i32> %x) {
1316; CHECK-LABEL: @test68(
1317; CHECK-NEXT:    [[TMP1:%.*]] = call <2 x i32> @llvm.smin.v2i32(<2 x i32> [[X:%.*]], <2 x i32> splat (i32 255))
1318; CHECK-NEXT:    [[DOTNEG:%.*]] = add nsw <2 x i32> [[TMP1]], splat (i32 1)
1319; CHECK-NEXT:    ret <2 x i32> [[DOTNEG]]
1320;
1321  %1 = xor <2 x i32> %x, <i32 -1, i32 -1>
1322  %2 = icmp sgt <2 x i32> %1, <i32 -256, i32 -256>
1323  %3 = select <2 x i1> %2, <2 x i32> %1, <2 x i32> <i32 -256, i32 -256>
1324  %res = sub <2 x i32> zeroinitializer, %3
1325  ret <2 x i32> %res
1326}
1327
1328; And non-splat constant vectors.
1329define <2 x i32> @test69(<2 x i32> %x) {
1330; CHECK-LABEL: @test69(
1331; CHECK-NEXT:    [[TMP1:%.*]] = call <2 x i32> @llvm.smin.v2i32(<2 x i32> [[X:%.*]], <2 x i32> <i32 255, i32 127>)
1332; CHECK-NEXT:    [[DOTNEG:%.*]] = add <2 x i32> [[TMP1]], splat (i32 1)
1333; CHECK-NEXT:    ret <2 x i32> [[DOTNEG]]
1334;
1335  %1 = xor <2 x i32> %x, <i32 -1, i32 -1>
1336  %2 = icmp sgt <2 x i32> %1, <i32 -256, i32 -128>
1337  %3 = select <2 x i1> %2, <2 x i32> %1, <2 x i32> <i32 -256, i32 -128>
1338  %res = sub <2 x i32> zeroinitializer, %3
1339  ret <2 x i32> %res
1340}
1341
1342; Check (X | Y) - Y --> X & ~Y when Y is a constant
1343define i32 @test70(i32 %A) {
1344; CHECK-LABEL: @test70(
1345; CHECK-NEXT:    [[C:%.*]] = and i32 [[A:%.*]], -124
1346; CHECK-NEXT:    ret i32 [[C]]
1347;
1348  %B = or i32 %A, 123
1349  %C = sub i32 %B, 123
1350  ret i32 %C
1351}
1352
1353; Check (X | Y) - Y --> (X | Y) ^ Y doesn't happen where (X | Y) has multiple uses
1354define i32 @test71(i32 %A, i32 %B) {
1355; CHECK-LABEL: @test71(
1356; CHECK-NEXT:    [[C:%.*]] = or i32 [[A:%.*]], [[B:%.*]]
1357; CHECK-NEXT:    [[D:%.*]] = sub i32 [[C]], [[B]]
1358; CHECK-NEXT:    [[E:%.*]] = mul i32 [[C]], [[D]]
1359; CHECK-NEXT:    ret i32 [[E]]
1360;
1361  %C = or i32 %A, %B
1362  %D = sub i32 %C, %B
1363  %E = mul i32 %C, %D
1364  ret i32 %E
1365}
1366
1367; Check (X | Y) - Y --> X & ~Y where X and Y are vectors
1368define <2 x i32> @test72(<2 x i32> %A, <2 x i32> %B) {
1369; CHECK-LABEL: @test72(
1370; CHECK-NEXT:    [[B_NOT:%.*]] = xor <2 x i32> [[B:%.*]], splat (i32 -1)
1371; CHECK-NEXT:    [[D:%.*]] = and <2 x i32> [[A:%.*]], [[B_NOT]]
1372; CHECK-NEXT:    ret <2 x i32> [[D]]
1373;
1374  %C = or <2 x i32> %A, %B
1375  %D = sub <2 x i32> %C, %B
1376  ret <2 x i32> %D
1377}
1378
1379; Check reversing sub operands won't trigger (X | Y) - Y --> X & ~Y
1380define i32 @test73(i32 %A, i32 %B) {
1381; CHECK-LABEL: @test73(
1382; CHECK-NEXT:    [[C:%.*]] = or i32 [[A:%.*]], [[B:%.*]]
1383; CHECK-NEXT:    [[D:%.*]] = sub i32 [[B]], [[C]]
1384; CHECK-NEXT:    ret i32 [[D]]
1385;
1386  %C = or i32 %A, %B
1387  %D = sub i32 %B, %C
1388  ret i32 %D
1389}
1390
1391define i32 @nsw_inference1(i32 %x, i32 %y) {
1392; CHECK-LABEL: @nsw_inference1(
1393; CHECK-NEXT:    [[X2:%.*]] = or i32 [[X:%.*]], 1024
1394; CHECK-NEXT:    [[Y2:%.*]] = and i32 [[Y:%.*]], 1
1395; CHECK-NEXT:    [[Z:%.*]] = sub nuw nsw i32 [[X2]], [[Y2]]
1396; CHECK-NEXT:    ret i32 [[Z]]
1397;
1398  %x2 = or i32 %x, 1024
1399  %y2 = and i32 %y, 1
1400  %z = sub i32 %x2, %y2
1401  ret i32 %z
1402}
1403
1404define i32 @nsw_inference2(i32 %x, i32 %y) {
1405; CHECK-LABEL: @nsw_inference2(
1406; CHECK-NEXT:    [[X2:%.*]] = and i32 [[X:%.*]], -1025
1407; CHECK-NEXT:    [[Y2:%.*]] = or i32 [[Y:%.*]], -2
1408; CHECK-NEXT:    [[Z:%.*]] = sub nsw i32 [[X2]], [[Y2]]
1409; CHECK-NEXT:    ret i32 [[Z]]
1410;
1411  %x2 = and i32 %x, -1025
1412  %y2 = or i32 %y, -2
1413  %z = sub i32 %x2, %y2
1414  ret i32 %z
1415}
1416
1417define i8 @test74(i8 %x, i8 %y) {
1418; CHECK-LABEL: @test74(
1419; CHECK-NEXT:    [[T0:%.*]] = and i8 [[X:%.*]], [[Y:%.*]]
1420; CHECK-NEXT:    call void @use8(i8 [[T0]])
1421; CHECK-NEXT:    [[T1:%.*]] = sub i8 [[X]], [[T0]]
1422; CHECK-NEXT:    ret i8 [[T1]]
1423;
1424  %t0 = and i8 %x, %y
1425  call void @use8(i8 %t0)
1426  %t1 = sub i8 %x, %t0
1427  ret i8 %t1
1428}
1429
1430define i8 @test75(i8 %x) {
1431; CHECK-LABEL: @test75(
1432; CHECK-NEXT:    [[T0:%.*]] = and i8 [[X:%.*]], -8
1433; CHECK-NEXT:    call void @use8(i8 [[T0]])
1434; CHECK-NEXT:    [[T1:%.*]] = and i8 [[X]], 7
1435; CHECK-NEXT:    ret i8 [[T1]]
1436;
1437  %t0 = and i8 %x, -8
1438  call void @use8(i8 %t0)
1439  %t1 = sub i8 %x, %t0
1440  ret i8 %t1
1441}
1442
1443; ((w-x) + y) - z --> (w+y) - (x+z)
1444
1445define i8 @sub_add_sub_reassoc(i8 %w, i8 %x, i8 %y, i8 %z) {
1446; CHECK-LABEL: @sub_add_sub_reassoc(
1447; CHECK-NEXT:    [[TMP1:%.*]] = add i8 [[W:%.*]], [[Y:%.*]]
1448; CHECK-NEXT:    [[TMP2:%.*]] = add i8 [[X:%.*]], [[Z:%.*]]
1449; CHECK-NEXT:    [[S2:%.*]] = sub i8 [[TMP1]], [[TMP2]]
1450; CHECK-NEXT:    ret i8 [[S2]]
1451;
1452  %s1 = sub i8 %w, %x
1453  %a = add i8 %s1, %y
1454  %s2 = sub i8 %a, %z
1455  ret i8 %s2
1456}
1457
1458; vectors work too.
1459
1460define <2 x i8> @sub_add_sub_reassoc_commute(<2 x i8> %w, <2 x i8> %x, <2 x i8> %y, <2 x i8> %z) {
1461; CHECK-LABEL: @sub_add_sub_reassoc_commute(
1462; CHECK-NEXT:    [[D:%.*]] = sdiv <2 x i8> [[Y:%.*]], <i8 42, i8 -42>
1463; CHECK-NEXT:    [[TMP1:%.*]] = add <2 x i8> [[W:%.*]], [[D]]
1464; CHECK-NEXT:    [[TMP2:%.*]] = add <2 x i8> [[X:%.*]], [[Z:%.*]]
1465; CHECK-NEXT:    [[S2:%.*]] = sub <2 x i8> [[TMP1]], [[TMP2]]
1466; CHECK-NEXT:    ret <2 x i8> [[S2]]
1467;
1468  %d = sdiv <2 x i8> %y, <i8 42, i8 -42> ; thwart complexity-based canonicalization
1469  %s1 = sub <2 x i8> %w, %x
1470  %a = add <2 x i8> %d, %s1
1471  %s2 = sub <2 x i8> %a, %z
1472  ret <2 x i8> %s2
1473}
1474
1475; (v-w) + (x-y) - z --> (v+x) - (w+y+z)
1476
1477define i8 @sub_add_sub_reassoc_twice(i8 %v, i8 %w, i8 %x, i8 %y, i8 %z) {
1478; CHECK-LABEL: @sub_add_sub_reassoc_twice(
1479; CHECK-NEXT:    [[TMP1:%.*]] = add i8 [[W:%.*]], [[Z:%.*]]
1480; CHECK-NEXT:    [[TMP2:%.*]] = add i8 [[X:%.*]], [[V:%.*]]
1481; CHECK-NEXT:    [[TMP3:%.*]] = add i8 [[Y:%.*]], [[TMP1]]
1482; CHECK-NEXT:    [[S3:%.*]] = sub i8 [[TMP2]], [[TMP3]]
1483; CHECK-NEXT:    ret i8 [[S3]]
1484;
1485  %s1 = sub i8 %v, %w
1486  %s2 = sub i8 %x, %y
1487  %a = add i8 %s1, %s2
1488  %s3 = sub i8 %a, %z
1489  ret i8 %s3
1490}
1491
1492; negative test - uses
1493
1494define i8 @sub_add_sub_reassoc_use1(i8 %w, i8 %x, i8 %y, i8 %z) {
1495; CHECK-LABEL: @sub_add_sub_reassoc_use1(
1496; CHECK-NEXT:    [[S1:%.*]] = sub i8 [[W:%.*]], [[X:%.*]]
1497; CHECK-NEXT:    call void @use8(i8 [[S1]])
1498; CHECK-NEXT:    [[A:%.*]] = add i8 [[S1]], [[Y:%.*]]
1499; CHECK-NEXT:    [[S2:%.*]] = sub i8 [[A]], [[Z:%.*]]
1500; CHECK-NEXT:    ret i8 [[S2]]
1501;
1502  %s1 = sub i8 %w, %x
1503  call void @use8(i8 %s1)
1504  %a = add i8 %s1, %y
1505  %s2 = sub i8 %a, %z
1506  ret i8 %s2
1507}
1508
1509; negative test - uses
1510
1511define i8 @sub_add_sub_reassoc_use2(i8 %w, i8 %x, i8 %y, i8 %z) {
1512; CHECK-LABEL: @sub_add_sub_reassoc_use2(
1513; CHECK-NEXT:    [[S1:%.*]] = sub i8 [[W:%.*]], [[X:%.*]]
1514; CHECK-NEXT:    [[A:%.*]] = add i8 [[S1]], [[Y:%.*]]
1515; CHECK-NEXT:    call void @use8(i8 [[A]])
1516; CHECK-NEXT:    [[S2:%.*]] = sub i8 [[A]], [[Z:%.*]]
1517; CHECK-NEXT:    ret i8 [[S2]]
1518;
1519  %s1 = sub i8 %w, %x
1520  %a = add i8 %s1, %y
1521  call void @use8(i8 %a)
1522  %s2 = sub i8 %a, %z
1523  ret i8 %s2
1524}
1525
1526define i8 @sub_mask_lowbits(i8 %x) {
1527; CHECK-LABEL: @sub_mask_lowbits(
1528; CHECK-NEXT:    [[TMP1:%.*]] = and i8 [[X:%.*]], -4
1529; CHECK-NEXT:    [[R:%.*]] = add i8 [[TMP1]], -108
1530; CHECK-NEXT:    ret i8 [[R]]
1531;
1532  %a1 = add i8 %x, 148 ; 0x94
1533  %a2 = and i8 %x, 3
1534  %r = sub i8 %a1, %a2
1535  ret i8 %r
1536}
1537
1538; Negative test - low-bit mask must not overlap with offset
1539
1540define i8 @sub_not_mask_lowbits(i8 %x) {
1541; CHECK-LABEL: @sub_not_mask_lowbits(
1542; CHECK-NEXT:    [[A1:%.*]] = add i8 [[X:%.*]], 4
1543; CHECK-NEXT:    [[A2:%.*]] = and i8 [[X]], 7
1544; CHECK-NEXT:    [[R:%.*]] = sub i8 [[A1]], [[A2]]
1545; CHECK-NEXT:    ret i8 [[R]]
1546;
1547  %a1 = add i8 %x, 4
1548  %a2 = and i8 %x, 7
1549  %r = sub i8 %a1, %a2
1550  ret i8 %r
1551}
1552
1553define <2 x i8> @sub_mask_lowbits_splat_extra_use(<2 x i8> %x, ptr %p) {
1554; CHECK-LABEL: @sub_mask_lowbits_splat_extra_use(
1555; CHECK-NEXT:    [[A2:%.*]] = and <2 x i8> [[X:%.*]], splat (i8 10)
1556; CHECK-NEXT:    store <2 x i8> [[A2]], ptr [[P:%.*]], align 2
1557; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i8> [[X]], splat (i8 -11)
1558; CHECK-NEXT:    [[R:%.*]] = add <2 x i8> [[TMP1]], splat (i8 -64)
1559; CHECK-NEXT:    ret <2 x i8> [[R]]
1560;
1561  %a1 = add <2 x i8> %x, <i8 192, i8 192> ; 0xc0
1562  %a2 = and <2 x i8> %x, <i8 10, i8 10>   ; 0x0a
1563  store <2 x i8> %a2, ptr %p
1564  %r = sub <2 x i8> %a1, %a2
1565  ret <2 x i8> %r
1566}
1567
1568define i16 @sub_nsw_mul_nsw(i16 %x, i16 %y) {
1569; CHECK-LABEL: @sub_nsw_mul_nsw(
1570; CHECK-NEXT:    [[TMP1:%.*]] = sub nsw i16 [[X:%.*]], [[Y:%.*]]
1571; CHECK-NEXT:    [[R:%.*]] = shl nsw i16 [[TMP1]], 3
1572; CHECK-NEXT:    ret i16 [[R]]
1573;
1574  %x8 = mul nsw i16 %x, 8
1575  %y8 = mul nsw i16 %y, 8
1576  %r = sub nsw i16 %x8, %y8
1577  ret i16 %r
1578}
1579
1580define i16 @sub_nuw_mul_nsw(i16 %x, i16 %y) {
1581; CHECK-LABEL: @sub_nuw_mul_nsw(
1582; CHECK-NEXT:    [[TMP1:%.*]] = sub i16 [[X:%.*]], [[Y:%.*]]
1583; CHECK-NEXT:    [[R:%.*]] = shl i16 [[TMP1]], 2
1584; CHECK-NEXT:    ret i16 [[R]]
1585;
1586  %x8 = mul nsw i16 %x, 4
1587  %y8 = mul nsw i16 %y, 4
1588  %r = sub nuw i16 %x8, %y8
1589  ret i16 %r
1590}
1591
1592define i16 @sub_mul_nsw(i16 %x, i16 %y) {
1593; CHECK-LABEL: @sub_mul_nsw(
1594; CHECK-NEXT:    [[TMP1:%.*]] = sub i16 [[X:%.*]], [[Y:%.*]]
1595; CHECK-NEXT:    [[R:%.*]] = shl i16 [[TMP1]], 4
1596; CHECK-NEXT:    ret i16 [[R]]
1597;
1598  %x8 = mul nsw i16 %x, 16
1599  %y8 = mul nsw i16 %y, 16
1600  %r = sub i16 %x8, %y8
1601  ret i16 %r
1602}
1603
1604define i16 @sub_nsw_mul_nuw(i16 %x, i16 %y) {
1605; CHECK-LABEL: @sub_nsw_mul_nuw(
1606; CHECK-NEXT:    [[TMP1:%.*]] = sub i16 [[X:%.*]], [[Y:%.*]]
1607; CHECK-NEXT:    [[R:%.*]] = shl i16 [[TMP1]], 3
1608; CHECK-NEXT:    ret i16 [[R]]
1609;
1610  %x8 = mul nuw i16 %x, 8
1611  %y8 = mul nuw i16 %y, 8
1612  %r = sub nsw i16 %x8, %y8
1613  ret i16 %r
1614}
1615
1616define i16 @sub_nuw_mul_nuw(i16 %x, i16 %y) {
1617; CHECK-LABEL: @sub_nuw_mul_nuw(
1618; CHECK-NEXT:    [[TMP1:%.*]] = sub nuw i16 [[X:%.*]], [[Y:%.*]]
1619; CHECK-NEXT:    [[R:%.*]] = shl nuw i16 [[TMP1]], 4
1620; CHECK-NEXT:    ret i16 [[R]]
1621;
1622  %x8 = mul nuw i16 %x, 16
1623  %y8 = mul nuw i16 %y, 16
1624  %r = sub nuw i16 %x8, %y8
1625  ret i16 %r
1626}
1627
1628define i16 @sub_mul_nuw(i16 %x, i16 %y) {
1629; CHECK-LABEL: @sub_mul_nuw(
1630; CHECK-NEXT:    [[TMP1:%.*]] = sub i16 [[X:%.*]], [[Y:%.*]]
1631; CHECK-NEXT:    [[R:%.*]] = shl i16 [[TMP1]], 5
1632; CHECK-NEXT:    ret i16 [[R]]
1633;
1634  %x8 = mul nuw i16 %x, 32
1635  %y8 = mul nuw i16 %y, 32
1636  %r = sub i16 %x8, %y8
1637  ret i16 %r
1638}
1639define i32 @and_test(i32 %x, i32 %y) {
1640; CHECK-LABEL: @and_test(
1641; CHECK-NEXT:    [[R:%.*]] = and i32 [[X:%.*]], [[Y:%.*]]
1642; CHECK-NEXT:    ret i32 [[R]]
1643;
1644  %a = add i32 %x, %y
1645  %o = or i32 %x, %y
1646  %r = sub i32 %a, %o
1647  ret i32 %r
1648}
1649
1650define i32 @and_test2(i32 %x, i32 %y) {
1651; CHECK-LABEL: @and_test2(
1652; CHECK-NEXT:    [[R:%.*]] = and i32 [[X:%.*]], [[Y:%.*]]
1653; CHECK-NEXT:    ret i32 [[R]]
1654;
1655  %a = add i32 %x, %y
1656  %o = or i32 %y, %x
1657  %r = sub i32 %a, %o
1658  ret i32 %r
1659}
1660
1661define i32 @and_test3(i32 %x, i32 %y) {
1662; CHECK-LABEL: @and_test3(
1663; CHECK-NEXT:    [[R:%.*]] = and i32 [[Y:%.*]], [[X:%.*]]
1664; CHECK-NEXT:    ret i32 [[R]]
1665;
1666  %a = add i32 %y, %x
1667  %o = or i32 %x, %y
1668  %r = sub i32 %a, %o
1669  ret i32 %r
1670}
1671
1672
1673define <2 x i8> @and_vec(<2 x i8> %X, <2 x i8> %Y) {
1674; CHECK-LABEL: @and_vec(
1675; CHECK-NEXT:    [[R:%.*]] = and <2 x i8> [[X:%.*]], [[Y:%.*]]
1676; CHECK-NEXT:    ret <2 x i8> [[R]]
1677;
1678  %a = add <2 x i8> %X, %Y
1679  %o = or <2 x i8> %X, %Y
1680  %r = sub <2 x i8> %a, %o
1681  ret <2 x i8> %r
1682}
1683
1684define i32 @or_test(i32 %x, i32 %y) {
1685; CHECK-LABEL: @or_test(
1686; CHECK-NEXT:    [[R:%.*]] = or i32 [[X:%.*]], [[Y:%.*]]
1687; CHECK-NEXT:    ret i32 [[R]]
1688;
1689  %a = add i32 %x, %y
1690  %b = and i32 %x, %y
1691  %r = sub i32 %a, %b
1692  ret i32 %r
1693}
1694
1695define i32 @or_test2(i32 %x, i32 %y) {
1696; CHECK-LABEL: @or_test2(
1697; CHECK-NEXT:    [[R:%.*]] = or i32 [[X:%.*]], [[Y:%.*]]
1698; CHECK-NEXT:    ret i32 [[R]]
1699;
1700  %a = add i32 %x, %y
1701  %b = and i32 %y, %x
1702  %r = sub i32 %a, %b
1703  ret i32 %r
1704}
1705
1706define i32 @or_test3(i32 %x, i32 %y) {
1707; CHECK-LABEL: @or_test3(
1708; CHECK-NEXT:    [[R:%.*]] = or i32 [[Y:%.*]], [[X:%.*]]
1709; CHECK-NEXT:    ret i32 [[R]]
1710;
1711  %a = add i32 %y, %x
1712  %b = and i32 %x, %y
1713  %r = sub i32 %a, %b
1714  ret i32 %r
1715}
1716
1717define <2 x i8> @or_vec(<2 x i8> %X, <2 x i8> %Y) {
1718; CHECK-LABEL: @or_vec(
1719; CHECK-NEXT:    [[R:%.*]] = or <2 x i8> [[X:%.*]], [[Y:%.*]]
1720; CHECK-NEXT:    ret <2 x i8> [[R]]
1721;
1722  %a = add <2 x i8> %X, %Y
1723  %b = and <2 x i8> %X, %Y
1724  %r = sub <2 x i8> %a, %b
1725  ret <2 x i8> %r
1726}
1727
1728define i32 @pr51584(i32 %a, i32 %b) {
1729; CHECK-LABEL: @pr51584(
1730; CHECK-NEXT:    [[TMP1:%.*]] = add i32 [[B:%.*]], [[A:%.*]]
1731; CHECK-NEXT:    [[DOTNEG:%.*]] = sub i32 -11, [[TMP1]]
1732; CHECK-NEXT:    ret i32 [[DOTNEG]]
1733;
1734  %sub = sub i32 0, %a
1735  %add = add nsw i32 11, %b
1736  %sub1 = sub i32 %sub, %add
1737  ret i32 %sub1
1738}
1739
1740define i8 @sub_srem(i8 noundef %x, i8 %y) {
1741; CHECK-LABEL: @sub_srem(
1742; CHECK-NEXT:    [[REM:%.*]] = srem i8 [[X:%.*]], [[Y:%.*]]
1743; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i8 [[X]], [[REM]]
1744; CHECK-NEXT:    ret i8 [[SUB]]
1745;
1746  %rem = srem i8 %x, %y
1747  %sub = sub i8 %x, %rem
1748  ret i8 %sub
1749}
1750
1751define <2 x i5> @sub_urem(<2 x i5> noundef %x, <2 x i5> %y) {
1752; CHECK-LABEL: @sub_urem(
1753; CHECK-NEXT:    [[REM:%.*]] = urem <2 x i5> [[X:%.*]], [[Y:%.*]]
1754; CHECK-NEXT:    [[SUB:%.*]] = sub nuw <2 x i5> [[X]], [[REM]]
1755; CHECK-NEXT:    ret <2 x i5> [[SUB]]
1756;
1757  %rem = urem <2 x i5> %x, %y
1758  %sub = sub <2 x i5> %x, %rem
1759  ret <2 x i5> %sub
1760}
1761
1762define <3 x i32> @nuw_const_zext(<3 x i8> %y) {
1763; CHECK-LABEL: @nuw_const_zext(
1764; CHECK-NEXT:    [[ZY:%.*]] = zext <3 x i8> [[Y:%.*]] to <3 x i32>
1765; CHECK-NEXT:    [[S:%.*]] = sub nuw nsw <3 x i32> <i32 255, i32 128, i32 0>, [[ZY]]
1766; CHECK-NEXT:    ret <3 x i32> [[S]]
1767;
1768  %zy = zext <3 x i8> %y to <3 x i32>
1769  %s = sub nuw <3 x i32> <i32 255, i32 128, i32 0>, %zy
1770  ret <3 x i32> %s
1771}
1772
1773define i32 @nuw_const_zext_big(i8 %y) {
1774; CHECK-LABEL: @nuw_const_zext_big(
1775; CHECK-NEXT:    [[ZY:%.*]] = zext i8 [[Y:%.*]] to i32
1776; CHECK-NEXT:    [[S:%.*]] = sub nuw nsw i32 257, [[ZY]]
1777; CHECK-NEXT:    ret i32 [[S]]
1778;
1779  %zy = zext i8 %y to i32
1780  %s = sub nuw i32 257, %zy
1781  ret i32 %s
1782}
1783
1784define i32 @nuw_zext_zext(i8 %x, i8 %y) {
1785; CHECK-LABEL: @nuw_zext_zext(
1786; CHECK-NEXT:    [[ZX:%.*]] = zext i8 [[X:%.*]] to i32
1787; CHECK-NEXT:    [[ZY:%.*]] = zext i8 [[Y:%.*]] to i32
1788; CHECK-NEXT:    [[S:%.*]] = sub nuw nsw i32 [[ZX]], [[ZY]]
1789; CHECK-NEXT:    ret i32 [[S]]
1790;
1791  %zx = zext i8 %x to i32
1792  %zy = zext i8 %y to i32
1793  %s = sub nuw i32 %zx, %zy
1794  ret i32 %s
1795}
1796
1797define <2 x i16> @nuw_zext_sext(<2 x i8> %x, <2 x i8> %y) {
1798; CHECK-LABEL: @nuw_zext_sext(
1799; CHECK-NEXT:    [[ZX:%.*]] = zext <2 x i8> [[X:%.*]] to <2 x i16>
1800; CHECK-NEXT:    [[SY:%.*]] = sext <2 x i8> [[Y:%.*]] to <2 x i16>
1801; CHECK-NEXT:    [[S:%.*]] = sub nuw nsw <2 x i16> [[ZX]], [[SY]]
1802; CHECK-NEXT:    ret <2 x i16> [[S]]
1803;
1804  %zx = zext <2 x i8> %x to <2 x i16>
1805  %sy = sext <2 x i8> %y to <2 x i16>
1806  %s = sub nuw <2 x i16> %zx, %sy
1807  ret <2 x i16> %s
1808}
1809
1810define i32 @nuw_sext_zext(i8 %x, i8 %y) {
1811; CHECK-LABEL: @nuw_sext_zext(
1812; CHECK-NEXT:    [[SX:%.*]] = sext i8 [[X:%.*]] to i32
1813; CHECK-NEXT:    [[ZY:%.*]] = zext i8 [[Y:%.*]] to i32
1814; CHECK-NEXT:    [[S:%.*]] = sub nuw nsw i32 [[SX]], [[ZY]]
1815; CHECK-NEXT:    ret i32 [[S]]
1816;
1817  %sx = sext i8 %x to i32
1818  %zy = zext i8 %y to i32
1819  %s = sub nuw i32 %sx, %zy
1820  ret i32 %s
1821}
1822
1823define i8 @nuw_zext_zext_use1(i5 %x, i5 %y) {
1824; CHECK-LABEL: @nuw_zext_zext_use1(
1825; CHECK-NEXT:    [[ZX:%.*]] = zext i5 [[X:%.*]] to i8
1826; CHECK-NEXT:    call void @use8(i8 [[ZX]])
1827; CHECK-NEXT:    [[ZY:%.*]] = zext i5 [[Y:%.*]] to i8
1828; CHECK-NEXT:    [[S:%.*]] = sub nuw nsw i8 [[ZX]], [[ZY]]
1829; CHECK-NEXT:    ret i8 [[S]]
1830;
1831  %zx = zext i5 %x to i8
1832  call void @use8(i8 %zx)
1833  %zy = zext i5 %y to i8
1834  %s = sub nuw i8 %zx, %zy
1835  ret i8 %s
1836}
1837
1838define i8 @nuw_zext_zext_use2(i5 %x, i5 %y) {
1839; CHECK-LABEL: @nuw_zext_zext_use2(
1840; CHECK-NEXT:    [[ZX:%.*]] = zext i5 [[X:%.*]] to i8
1841; CHECK-NEXT:    [[ZY:%.*]] = zext i5 [[Y:%.*]] to i8
1842; CHECK-NEXT:    call void @use8(i8 [[ZY]])
1843; CHECK-NEXT:    [[S:%.*]] = sub nuw nsw i8 [[ZX]], [[ZY]]
1844; CHECK-NEXT:    ret i8 [[S]]
1845;
1846  %zx = zext i5 %x to i8
1847  %zy = zext i5 %y to i8
1848  call void @use8(i8 %zy)
1849  %s = sub nuw i8 %zx, %zy
1850  ret i8 %s
1851}
1852
1853define i8 @nuw_zext_zext_use3(i5 %x, i5 %y) {
1854; CHECK-LABEL: @nuw_zext_zext_use3(
1855; CHECK-NEXT:    [[ZX:%.*]] = zext i5 [[X:%.*]] to i8
1856; CHECK-NEXT:    call void @use8(i8 [[ZX]])
1857; CHECK-NEXT:    [[ZY:%.*]] = zext i5 [[Y:%.*]] to i8
1858; CHECK-NEXT:    call void @use8(i8 [[ZY]])
1859; CHECK-NEXT:    [[S:%.*]] = sub nuw nsw i8 [[ZX]], [[ZY]]
1860; CHECK-NEXT:    ret i8 [[S]]
1861;
1862  %zx = zext i5 %x to i8
1863  call void @use8(i8 %zx)
1864  %zy = zext i5 %y to i8
1865  call void @use8(i8 %zy)
1866  %s = sub nuw i8 %zx, %zy
1867  ret i8 %s
1868}
1869
1870define i32 @nuw_zext_zext_different_width(i8 %x, i7 %y) {
1871; CHECK-LABEL: @nuw_zext_zext_different_width(
1872; CHECK-NEXT:    [[ZX:%.*]] = zext i8 [[X:%.*]] to i32
1873; CHECK-NEXT:    [[ZY:%.*]] = zext i7 [[Y:%.*]] to i32
1874; CHECK-NEXT:    [[S:%.*]] = sub nuw nsw i32 [[ZX]], [[ZY]]
1875; CHECK-NEXT:    ret i32 [[S]]
1876;
1877  %zx = zext i8 %x to i32
1878  %zy = zext i7 %y to i32
1879  %s = sub nuw i32 %zx, %zy
1880  ret i32 %s
1881}
1882
1883define i16 @sext_nsw_noundef(i8 noundef %x, i8 %y) {
1884; CHECK-LABEL: @sext_nsw_noundef(
1885; CHECK-NEXT:    [[Z:%.*]] = sext i8 [[Y:%.*]] to i16
1886; CHECK-NEXT:    ret i16 [[Z]]
1887;
1888  %d = sub nsw i8 %x, %y
1889  %ex = sext i8 %x to i16
1890  %ed = sext i8 %d to i16
1891  %z = sub i16 %ex, %ed
1892  ret i16 %z
1893}
1894
1895; negative test - requires noundef
1896
1897define i16 @sext_nsw(i8 %x, i8 %y) {
1898; CHECK-LABEL: @sext_nsw(
1899; CHECK-NEXT:    [[D:%.*]] = sub nsw i8 [[X:%.*]], [[Y:%.*]]
1900; CHECK-NEXT:    [[EX:%.*]] = sext i8 [[X]] to i16
1901; CHECK-NEXT:    [[ED:%.*]] = sext i8 [[D]] to i16
1902; CHECK-NEXT:    [[Z:%.*]] = sub nsw i16 [[EX]], [[ED]]
1903; CHECK-NEXT:    ret i16 [[Z]]
1904;
1905  %d = sub nsw i8 %x, %y
1906  %ex = sext i8 %x to i16
1907  %ed = sext i8 %d to i16
1908  %z = sub i16 %ex, %ed
1909  ret i16 %z
1910}
1911
1912; negative test - requires nsw
1913
1914define i16 @sext_noundef(i8 noundef %x, i8 %y) {
1915; CHECK-LABEL: @sext_noundef(
1916; CHECK-NEXT:    [[D:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
1917; CHECK-NEXT:    [[EX:%.*]] = sext i8 [[X]] to i16
1918; CHECK-NEXT:    [[ED:%.*]] = sext i8 [[D]] to i16
1919; CHECK-NEXT:    [[Z:%.*]] = sub nsw i16 [[EX]], [[ED]]
1920; CHECK-NEXT:    ret i16 [[Z]]
1921;
1922  %d = sub i8 %x, %y
1923  %ex = sext i8 %x to i16
1924  %ed = sext i8 %d to i16
1925  %z = sub i16 %ex, %ed
1926  ret i16 %z
1927}
1928
1929; negative test - must have common operand
1930
1931define i16 @sext_nsw_noundef_wrong_val(i8 noundef %x, i8 noundef %y, i8 noundef %q) {
1932; CHECK-LABEL: @sext_nsw_noundef_wrong_val(
1933; CHECK-NEXT:    [[D:%.*]] = sub nsw i8 [[X:%.*]], [[Y:%.*]]
1934; CHECK-NEXT:    [[EQ:%.*]] = sext i8 [[Q:%.*]] to i16
1935; CHECK-NEXT:    [[ED:%.*]] = sext i8 [[D]] to i16
1936; CHECK-NEXT:    [[Z:%.*]] = sub nsw i16 [[EQ]], [[ED]]
1937; CHECK-NEXT:    ret i16 [[Z]]
1938;
1939  %d = sub nsw i8 %x, %y
1940  %eq = sext i8 %q to i16
1941  %ed = sext i8 %d to i16
1942  %z = sub i16 %eq, %ed
1943  ret i16 %z
1944}
1945
1946; two no-wrap analyses combine to allow reduction
1947
1948define i16 @srem_sext_noundef(i8 noundef %x, i8 %y) {
1949; CHECK-LABEL: @srem_sext_noundef(
1950; CHECK-NEXT:    [[R:%.*]] = srem i8 [[X:%.*]], [[Y:%.*]]
1951; CHECK-NEXT:    [[Z:%.*]] = sext i8 [[R]] to i16
1952; CHECK-NEXT:    ret i16 [[Z]]
1953;
1954  %r = srem i8 %x, %y
1955  %d = sub i8 %x, %r
1956  %sd = sext i8 %d to i16
1957  %sx = sext i8 %x to i16
1958  %z = sub i16 %sx, %sd
1959  ret i16 %z
1960}
1961
1962define i16 @zext_nuw_noundef(i8 noundef %x, i8 %y) {
1963; CHECK-LABEL: @zext_nuw_noundef(
1964; CHECK-NEXT:    [[Z:%.*]] = zext i8 [[Y:%.*]] to i16
1965; CHECK-NEXT:    ret i16 [[Z]]
1966;
1967  %d = sub nuw i8 %x, %y
1968  %ex = zext i8 %x to i16
1969  %ed = zext i8 %d to i16
1970  %z = sub i16 %ex, %ed
1971  ret i16 %z
1972}
1973
1974; negative test - requires noundef
1975
1976define i16 @zext_nuw(i8 %x, i8 %y) {
1977; CHECK-LABEL: @zext_nuw(
1978; CHECK-NEXT:    [[D:%.*]] = sub nuw i8 [[X:%.*]], [[Y:%.*]]
1979; CHECK-NEXT:    [[EX:%.*]] = zext i8 [[X]] to i16
1980; CHECK-NEXT:    [[ED:%.*]] = zext i8 [[D]] to i16
1981; CHECK-NEXT:    [[Z:%.*]] = sub nsw i16 [[EX]], [[ED]]
1982; CHECK-NEXT:    ret i16 [[Z]]
1983;
1984  %d = sub nuw i8 %x, %y
1985  %ex = zext i8 %x to i16
1986  %ed = zext i8 %d to i16
1987  %z = sub i16 %ex, %ed
1988  ret i16 %z
1989}
1990
1991; negative test - requires nuw
1992
1993define i16 @zext_noundef(i8 noundef %x, i8 %y) {
1994; CHECK-LABEL: @zext_noundef(
1995; CHECK-NEXT:    [[D:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
1996; CHECK-NEXT:    [[EX:%.*]] = zext i8 [[X]] to i16
1997; CHECK-NEXT:    [[ED:%.*]] = zext i8 [[D]] to i16
1998; CHECK-NEXT:    [[Z:%.*]] = sub nsw i16 [[EX]], [[ED]]
1999; CHECK-NEXT:    ret i16 [[Z]]
2000;
2001  %d = sub i8 %x, %y
2002  %ex = zext i8 %x to i16
2003  %ed = zext i8 %d to i16
2004  %z = sub i16 %ex, %ed
2005  ret i16 %z
2006}
2007
2008; negative test - must have common operand
2009
2010define i16 @zext_nsw_noundef_wrong_val(i8 noundef %x, i8 noundef %y, i8 noundef %q) {
2011; CHECK-LABEL: @zext_nsw_noundef_wrong_val(
2012; CHECK-NEXT:    [[D:%.*]] = sub nuw i8 [[X:%.*]], [[Y:%.*]]
2013; CHECK-NEXT:    [[EQ:%.*]] = zext i8 [[Q:%.*]] to i16
2014; CHECK-NEXT:    [[ED:%.*]] = zext i8 [[D]] to i16
2015; CHECK-NEXT:    [[Z:%.*]] = sub nsw i16 [[EQ]], [[ED]]
2016; CHECK-NEXT:    ret i16 [[Z]]
2017;
2018  %d = sub nuw i8 %x, %y
2019  %eq = zext i8 %q to i16
2020  %ed = zext i8 %d to i16
2021  %z = sub i16 %eq, %ed
2022  ret i16 %z
2023}
2024
2025; two no-wrap analyses combine to allow reduction
2026
2027define i16 @urem_zext_noundef(i8 noundef %x, i8 %y) {
2028; CHECK-LABEL: @urem_zext_noundef(
2029; CHECK-NEXT:    [[R:%.*]] = urem i8 [[X:%.*]], [[Y:%.*]]
2030; CHECK-NEXT:    [[Z:%.*]] = zext i8 [[R]] to i16
2031; CHECK-NEXT:    ret i16 [[Z]]
2032;
2033  %r = urem i8 %x, %y
2034  %d = sub i8 %x, %r
2035  %ed = zext i8 %d to i16
2036  %ex = zext i8 %x to i16
2037  %z = sub i16 %ex, %ed
2038  ret i16 %z
2039}
2040
2041; x * y - x --> (y - 1) * x
2042; TODO: The mul could retain nsw.
2043
2044define i8 @mul_sub_common_factor_commute1(i8 %x, i8 %y) {
2045; CHECK-LABEL: @mul_sub_common_factor_commute1(
2046; CHECK-NEXT:    [[X1:%.*]] = add i8 [[Y:%.*]], -1
2047; CHECK-NEXT:    [[A:%.*]] = mul i8 [[X:%.*]], [[X1]]
2048; CHECK-NEXT:    ret i8 [[A]]
2049;
2050  %m = mul nsw i8 %x, %y
2051  %a = sub nsw i8 %m, %x
2052  ret i8 %a
2053}
2054
2055; TODO: The mul could retain nuw.
2056
2057define <2 x i8> @mul_sub_common_factor_commute2(<2 x i8> %x, <2 x i8> %y) {
2058; CHECK-LABEL: @mul_sub_common_factor_commute2(
2059; CHECK-NEXT:    [[M1:%.*]] = add <2 x i8> [[Y:%.*]], splat (i8 -1)
2060; CHECK-NEXT:    [[A:%.*]] = mul <2 x i8> [[M1]], [[X:%.*]]
2061; CHECK-NEXT:    ret <2 x i8> [[A]]
2062;
2063  %m = mul nuw <2 x i8> %y, %x
2064  %a = sub nuw <2 x i8> %m, %x
2065  ret <2 x i8> %a
2066}
2067
2068; x - (x * y) --> (1 - y) * x
2069
2070define i8 @mul_sub_common_factor_commute3(i8 %x, i8 %y) {
2071; CHECK-LABEL: @mul_sub_common_factor_commute3(
2072; CHECK-NEXT:    [[M1:%.*]] = sub i8 1, [[Y:%.*]]
2073; CHECK-NEXT:    [[A:%.*]] = mul i8 [[X:%.*]], [[M1]]
2074; CHECK-NEXT:    ret i8 [[A]]
2075;
2076  %m = mul nuw i8 %x, %y
2077  %a = sub nsw i8 %x, %m
2078  ret i8 %a
2079}
2080
2081define i8 @mul_sub_common_factor_commute4(i8 %x, i8 %y) {
2082; CHECK-LABEL: @mul_sub_common_factor_commute4(
2083; CHECK-NEXT:    [[M1:%.*]] = sub i8 1, [[Y:%.*]]
2084; CHECK-NEXT:    [[A:%.*]] = mul i8 [[X:%.*]], [[M1]]
2085; CHECK-NEXT:    ret i8 [[A]]
2086;
2087  %m = mul nsw i8 %y, %x
2088  %a = sub nuw i8 %x, %m
2089  ret i8 %a
2090}
2091
2092; negative test - uses
2093
2094define i8 @mul_sub_common_factor_use(i8 %x, i8 %y) {
2095; CHECK-LABEL: @mul_sub_common_factor_use(
2096; CHECK-NEXT:    [[M:%.*]] = mul i8 [[X:%.*]], [[Y:%.*]]
2097; CHECK-NEXT:    call void @use8(i8 [[M]])
2098; CHECK-NEXT:    [[A:%.*]] = sub i8 [[M]], [[X]]
2099; CHECK-NEXT:    ret i8 [[A]]
2100;
2101  %m = mul i8 %x, %y
2102  call void @use8(i8 %m)
2103  %a = sub i8 %m, %x
2104  ret i8 %a
2105}
2106
2107define i5 @demand_low_bits_uses(i8 %x, i8 %y) {
2108; CHECK-LABEL: @demand_low_bits_uses(
2109; CHECK-NEXT:    [[M:%.*]] = and i8 [[X:%.*]], 96
2110; CHECK-NEXT:    [[A:%.*]] = sub i8 [[Y:%.*]], [[M]]
2111; CHECK-NEXT:    call void @use8(i8 [[A]])
2112; CHECK-NEXT:    [[R:%.*]] = trunc i8 [[Y]] to i5
2113; CHECK-NEXT:    ret i5 [[R]]
2114;
2115  %m = and i8 %x, 96 ; 0x60
2116  %a = sub i8 %y, %m
2117  call void @use8(i8 %a)
2118  %r = trunc i8 %a to i5
2119  ret i5 %r
2120}
2121
2122; negative test - demands one more bit
2123
2124define i6 @demand_low_bits_uses_extra_bit(i8 %x, i8 %y) {
2125; CHECK-LABEL: @demand_low_bits_uses_extra_bit(
2126; CHECK-NEXT:    [[M:%.*]] = and i8 [[X:%.*]], 96
2127; CHECK-NEXT:    [[A:%.*]] = sub i8 [[Y:%.*]], [[M]]
2128; CHECK-NEXT:    call void @use8(i8 [[A]])
2129; CHECK-NEXT:    [[R:%.*]] = trunc i8 [[A]] to i6
2130; CHECK-NEXT:    ret i6 [[R]]
2131;
2132  %m = and i8 %x, 96 ; 0x60
2133  %a = sub i8 %y, %m
2134  call void @use8(i8 %a)
2135  %r = trunc i8 %a to i6
2136  ret i6 %r
2137}
2138
2139; negative test - must be operand 1
2140
2141define i8 @demand_low_bits_uses_commute(i8 %x, i8 %y, i8 %z) {
2142; CHECK-LABEL: @demand_low_bits_uses_commute(
2143; CHECK-NEXT:    [[M:%.*]] = and i8 [[X:%.*]], -64
2144; CHECK-NEXT:    [[A:%.*]] = sub i8 [[M]], [[Y:%.*]]
2145; CHECK-NEXT:    call void @use8(i8 [[A]])
2146; CHECK-NEXT:    [[S:%.*]] = sub i8 [[A]], [[Z:%.*]]
2147; CHECK-NEXT:    [[R:%.*]] = shl i8 [[S]], 2
2148; CHECK-NEXT:    ret i8 [[R]]
2149;
2150  %m = and i8 %x, -64 ; 0xC0
2151  %a = sub i8 %m, %y
2152  call void @use8(i8 %a)
2153  %s = sub i8 %a, %z
2154  %r = shl i8 %s, 2
2155  ret i8 %r
2156}
2157
2158; sub becomes negate and combines with shl
2159
2160define i8 @shrink_sub_from_constant_lowbits(i8 %x) {
2161; CHECK-LABEL: @shrink_sub_from_constant_lowbits(
2162; CHECK-NEXT:    [[X000_NEG:%.*]] = mul i8 [[X:%.*]], -8
2163; CHECK-NEXT:    ret i8 [[X000_NEG]]
2164;
2165  %x000 = shl i8 %x, 3   ; 3 low bits are known zero
2166  %sub = sub i8 7, %x000
2167  %r = and i8 %sub, -8   ; 3 low bits are not demanded
2168  ret i8 %r
2169}
2170
2171; negative test - extra use prevents shrinking '7'
2172
2173define i8 @shrink_sub_from_constant_lowbits_uses(i8 %x) {
2174; CHECK-LABEL: @shrink_sub_from_constant_lowbits_uses(
2175; CHECK-NEXT:    [[X000:%.*]] = shl i8 [[X:%.*]], 3
2176; CHECK-NEXT:    [[SUB:%.*]] = sub i8 7, [[X000]]
2177; CHECK-NEXT:    call void @use8(i8 [[SUB]])
2178; CHECK-NEXT:    [[R:%.*]] = and i8 [[SUB]], -8
2179; CHECK-NEXT:    ret i8 [[R]]
2180;
2181  %x000 = shl i8 %x, 3   ; 3 low bits are known zero
2182  %sub = sub i8 7, %x000
2183  call void @use8(i8 %sub)
2184  %r = and i8 %sub, -8   ; 3 low bits are not demanded
2185  ret i8 %r
2186}
2187
2188; safe to clear 3 low bits (2 higher bits remain set)
2189
2190define i8 @shrink_sub_from_constant_lowbits2(i8 %x) {
2191; CHECK-LABEL: @shrink_sub_from_constant_lowbits2(
2192; CHECK-NEXT:    [[X000:%.*]] = and i8 [[X:%.*]], -8
2193; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i8 24, [[X000]]
2194; CHECK-NEXT:    [[R:%.*]] = and i8 [[SUB]], -16
2195; CHECK-NEXT:    ret i8 [[R]]
2196;
2197  %x000 = and i8 %x, -8   ; 3 low bits are known zero
2198  %sub = sub nsw i8 30, %x000 ; 0b0001_1110
2199  %r = and i8 %sub, -16   ; 4 low bits are not demanded
2200  ret i8 %r
2201}
2202
2203; safe to clear 3 low bits (2 higher bits remain set)
2204
2205define <2 x i8> @shrink_sub_from_constant_lowbits3(<2 x i8> %x) {
2206; CHECK-LABEL: @shrink_sub_from_constant_lowbits3(
2207; CHECK-NEXT:    [[X0000:%.*]] = shl <2 x i8> [[X:%.*]], splat (i8 4)
2208; CHECK-NEXT:    [[SUB:%.*]] = sub nuw <2 x i8> splat (i8 24), [[X0000]]
2209; CHECK-NEXT:    [[R:%.*]] = lshr exact <2 x i8> [[SUB]], splat (i8 3)
2210; CHECK-NEXT:    ret <2 x i8> [[R]]
2211;
2212  %x0000 = shl <2 x i8> %x, <i8 4, i8 4>     ; 4 low bits are known zero
2213  %sub = sub nuw <2 x i8> <i8 31, i8 31>, %x0000
2214  %r = lshr <2 x i8> %sub, <i8 3, i8 3>      ; 3 low bits are not demanded
2215  ret <2 x i8> %r
2216}
2217
2218; eliminate the mask of y or the mask of the result
2219
2220define i8 @demand_sub_from_variable_lowbits(i8 %x, i8 %y) {
2221; CHECK-LABEL: @demand_sub_from_variable_lowbits(
2222; CHECK-NEXT:    [[X000:%.*]] = shl i8 [[X:%.*]], 3
2223; CHECK-NEXT:    [[SUB:%.*]] = sub i8 [[Y:%.*]], [[X000]]
2224; CHECK-NEXT:    [[R:%.*]] = and i8 [[SUB]], -8
2225; CHECK-NEXT:    ret i8 [[R]]
2226;
2227  %x000 = shl i8 %x, 3   ; 3 low bits are known zero
2228  %y000 = and i8 %y, -8
2229  %sub = sub i8 %y000, %x000
2230  %r = and i8 %sub, -8   ; 3 low bits are not demanded
2231  ret i8 %r
2232}
2233
2234; setting the low 3 bits of y doesn't change anything
2235
2236define i8 @demand_sub_from_variable_lowbits2(i8 %x, i8 %y) {
2237; CHECK-LABEL: @demand_sub_from_variable_lowbits2(
2238; CHECK-NEXT:    [[X0000:%.*]] = shl i8 [[X:%.*]], 4
2239; CHECK-NEXT:    [[SUB:%.*]] = sub nuw nsw i8 [[Y:%.*]], [[X0000]]
2240; CHECK-NEXT:    [[R:%.*]] = lshr i8 [[SUB]], 4
2241; CHECK-NEXT:    ret i8 [[R]]
2242;
2243  %x0000 = shl i8 %x, 4   ; 4 low bits are known zero
2244  %y111 = or i8 %y, 7
2245  %sub = sub nsw nuw i8 %y111, %x0000
2246  %r = lshr i8 %sub, 4    ; 4 low bits are not demanded
2247  ret i8 %r
2248}
2249
2250; negative test - the mask of y removes an extra bit, so that instruction is needed
2251
2252define i8 @demand_sub_from_variable_lowbits3(i8 %x, i8 %y) {
2253; CHECK-LABEL: @demand_sub_from_variable_lowbits3(
2254; CHECK-NEXT:    [[X0000:%.*]] = shl i8 [[X:%.*]], 4
2255; CHECK-NEXT:    [[Y00000:%.*]] = and i8 [[Y:%.*]], -32
2256; CHECK-NEXT:    [[SUB:%.*]] = sub i8 [[Y00000]], [[X0000]]
2257; CHECK-NEXT:    [[R:%.*]] = lshr exact i8 [[SUB]], 4
2258; CHECK-NEXT:    ret i8 [[R]]
2259;
2260  %x0000 = shl i8 %x, 4   ; 4 low bits are known zero
2261  %y00000 = and i8 %y, -32
2262  %sub = sub i8 %y00000, %x0000
2263  %r = lshr i8 %sub, 4    ; 4 low bits are not demanded
2264  ret i8 %r
2265}
2266
2267; C - ((C3 - X) & C2) --> (C - (C2 & C3)) + (X & C2) when:
2268; (C3 - ((C2 & C3) - 1)) is pow2
2269; ((C2 + C3) & ((C2 & C3) - 1)) == ((C2 & C3) - 1)
2270; C2 is negative pow2
2271define i10 @sub_to_and_nuw(i10 %x) {
2272; CHECK-LABEL: @sub_to_and_nuw(
2273; CHECK-NEXT:    [[TMP1:%.*]] = and i10 [[X:%.*]], 120
2274; CHECK-NEXT:    [[R:%.*]] = add nuw nsw i10 [[TMP1]], 379
2275; CHECK-NEXT:    ret i10 [[R]]
2276;
2277  %sub = sub nuw i10 71, %x
2278  %and = and i10 %sub, 120
2279  %r = sub i10 443, %and
2280  ret i10 %r
2281}
2282
2283; C - ((C3 -nuw X) & C2) --> (C - (C2 & C3)) + (X & C2) when:
2284; (C3 - ((C2 & C3) - 1)) is pow2
2285; ((C2 + C3) & ((C2 & C3) - 1)) == ((C2 & C3) - 1)
2286define i10 @sub_to_and_negpow2(i10 %x) {
2287; CHECK-LABEL: @sub_to_and_negpow2(
2288; CHECK-NEXT:    [[TMP1:%.*]] = and i10 [[X:%.*]], -8
2289; CHECK-NEXT:    [[R:%.*]] = add i10 [[TMP1]], -31
2290; CHECK-NEXT:    ret i10 [[R]]
2291;
2292  %sub = sub i10 71, %x
2293  %and = and i10 %sub, -8
2294  %r = sub i10 33, %and
2295  ret i10 %r
2296}
2297
2298; TODO:
2299; C + ((C3 -nuw X) & C2) --> (C + (C2 & C3)) - (X & C2) when:
2300define i10 @add_to_and_nuw(i10 %x) {
2301; CHECK-LABEL: @add_to_and_nuw(
2302; CHECK-NEXT:    [[SUB:%.*]] = sub nuw i10 71, [[X:%.*]]
2303; CHECK-NEXT:    [[AND:%.*]] = and i10 [[SUB]], 120
2304; CHECK-NEXT:    [[R:%.*]] = add nuw nsw i10 [[AND]], 224
2305; CHECK-NEXT:    ret i10 [[R]]
2306;
2307  %sub = sub nuw i10 71, %x
2308  %and = and i10 %sub, 120
2309  %r = add i10 224, %and
2310  ret i10 %r
2311}
2312
2313; (C3 - (C2 & C3) + 1) is not pow2
2314define i10 @sub_to_and_negative1(i10 %x) {
2315; CHECK-LABEL: @sub_to_and_negative1(
2316; CHECK-NEXT:    [[SUB:%.*]] = sub i10 71, [[X:%.*]]
2317; CHECK-NEXT:    [[AND:%.*]] = and i10 [[SUB]], 248
2318; CHECK-NEXT:    [[R:%.*]] = sub nuw nsw i10 444, [[AND]]
2319; CHECK-NEXT:    ret i10 [[R]]
2320;
2321  %sub = sub nuw i10 327, %x
2322  %and = and i10 %sub, 248
2323  %r = sub i10 444, %and
2324  ret i10 %r
2325}
2326
2327; ((C2 + C3) & ((C2 & C3) - 1)) == ((C2 & C3) - 1)
2328define i10 @sub_to_and_negative2(i10 %x) {
2329; CHECK-LABEL: @sub_to_and_negative2(
2330; CHECK-NEXT:    [[SUB:%.*]] = sub nuw i10 71, [[X:%.*]]
2331; CHECK-NEXT:    [[AND:%.*]] = and i10 [[SUB]], 88
2332; CHECK-NEXT:    [[R:%.*]] = sub nsw i10 64, [[AND]]
2333; CHECK-NEXT:    ret i10 [[R]]
2334;
2335  %sub = sub nuw i10 71, %x
2336  %and = and i10 %sub, 88
2337  %r = sub i10 64, %and
2338  ret i10 %r
2339}
2340
2341; no nuw && C2 is not neg-pow2
2342define i10 @sub_to_and_negative3(i10 %x) {
2343; CHECK-LABEL: @sub_to_and_negative3(
2344; CHECK-NEXT:    [[SUB:%.*]] = sub i10 71, [[X:%.*]]
2345; CHECK-NEXT:    [[AND:%.*]] = and i10 [[SUB]], 120
2346; CHECK-NEXT:    [[R:%.*]] = sub nsw i10 64, [[AND]]
2347; CHECK-NEXT:    ret i10 [[R]]
2348;
2349  %sub = sub i10 71, %x
2350  %and = and i10 %sub, 120
2351  %r = sub i10 64, %and
2352  ret i10 %r
2353}
2354
2355declare void @use10(i10)
2356
2357; and is not one-use
2358define i10 @sub_to_and_negative4(i10 %x) {
2359; CHECK-LABEL: @sub_to_and_negative4(
2360; CHECK-NEXT:    [[SUB:%.*]] = sub i10 71, [[X:%.*]]
2361; CHECK-NEXT:    [[AND:%.*]] = and i10 [[SUB]], 120
2362; CHECK-NEXT:    [[R:%.*]] = sub nsw i10 64, [[AND]]
2363; CHECK-NEXT:    call void @use10(i10 [[AND]])
2364; CHECK-NEXT:    ret i10 [[R]]
2365;
2366  %sub = sub i10 71, %x
2367  %and = and i10 %sub, 120
2368  %r = sub i10 64, %and
2369  call void @use10(i10 %and)
2370  ret i10 %r
2371}
2372
2373
2374define <2 x i8> @sub_to_and_vector1(<2 x i8> %x) {
2375; CHECK-LABEL: @sub_to_and_vector1(
2376; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i8> [[X:%.*]], splat (i8 120)
2377; CHECK-NEXT:    [[R:%.*]] = add nsw <2 x i8> [[TMP1]], splat (i8 -9)
2378; CHECK-NEXT:    ret <2 x i8> [[R]]
2379;
2380  %sub = sub nuw <2 x i8> <i8 71, i8 71>, %x
2381  %and = and <2 x i8> %sub, <i8 120, i8 120>
2382  %r = sub <2 x i8>  <i8 55, i8 55>, %and
2383  ret <2 x i8> %r
2384}
2385
2386
2387define <2 x i8> @sub_to_and_vector2(<2 x i8> %x) {
2388; CHECK-LABEL: @sub_to_and_vector2(
2389; CHECK-NEXT:    [[SUB:%.*]] = sub nuw <2 x i8> <i8 71, i8 poison>, [[X:%.*]]
2390; CHECK-NEXT:    [[AND:%.*]] = and <2 x i8> [[SUB]], splat (i8 120)
2391; CHECK-NEXT:    [[R:%.*]] = sub nsw <2 x i8> splat (i8 77), [[AND]]
2392; CHECK-NEXT:    ret <2 x i8> [[R]]
2393;
2394  %sub = sub nuw <2 x i8> <i8 71, i8 poison>, %x
2395  %and = and <2 x i8> %sub, <i8 120, i8 120>
2396  %r = sub <2 x i8>  <i8 77, i8 77>, %and
2397  ret <2 x i8> %r
2398}
2399
2400
2401define <2 x i8> @sub_to_and_vector3(<2 x i8> %x) {
2402; CHECK-LABEL: @sub_to_and_vector3(
2403; CHECK-NEXT:    [[SUB:%.*]] = sub nuw <2 x i8> splat (i8 71), [[X:%.*]]
2404; CHECK-NEXT:    [[AND:%.*]] = and <2 x i8> [[SUB]], <i8 120, i8 poison>
2405; CHECK-NEXT:    [[R:%.*]] = sub nsw <2 x i8> splat (i8 44), [[AND]]
2406; CHECK-NEXT:    ret <2 x i8> [[R]]
2407;
2408  %sub = sub nuw <2 x i8> <i8 71, i8 71>, %x
2409  %and = and <2 x i8> %sub, <i8 120, i8 poison>
2410  %r = sub <2 x i8>  <i8 44, i8 44>, %and
2411  ret <2 x i8> %r
2412}
2413
2414
2415define <2 x i8> @sub_to_and_vector4(<2 x i8> %x) {
2416; CHECK-LABEL: @sub_to_and_vector4(
2417; CHECK-NEXT:    [[SUB:%.*]] = sub nuw <2 x i8> splat (i8 71), [[X:%.*]]
2418; CHECK-NEXT:    [[AND:%.*]] = and <2 x i8> [[SUB]], splat (i8 120)
2419; CHECK-NEXT:    [[R:%.*]] = sub nsw <2 x i8> <i8 88, i8 poison>, [[AND]]
2420; CHECK-NEXT:    ret <2 x i8> [[R]]
2421;
2422  %sub = sub nuw <2 x i8> <i8 71, i8 71>, %x
2423  %and = and <2 x i8> %sub, <i8 120, i8 120>
2424  %r = sub <2 x i8>  <i8 88, i8 poison>, %and
2425  ret <2 x i8> %r
2426}
2427
2428; (X * X) - (Y * Y) --> (X + Y) * (X - Y)
2429
2430define i8 @diff_of_squares(i8 %x, i8 %y) {
2431; CHECK-LABEL: @diff_of_squares(
2432; CHECK-NEXT:    [[ADD:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]
2433; CHECK-NEXT:    [[SUB:%.*]] = sub i8 [[X]], [[Y]]
2434; CHECK-NEXT:    [[R:%.*]] = mul i8 [[ADD]], [[SUB]]
2435; CHECK-NEXT:    ret i8 [[R]]
2436;
2437  %x2 = mul i8 %x, %x
2438  %y2 = mul i8 %y, %y
2439  %r = sub i8 %x2, %y2
2440  ret i8 %r
2441}
2442
2443; All-or-nothing for propagation of no-wrap flags (possibly conservative)
2444
2445define i5 @diff_of_squares_nuw(i5 %x, i5 %y) {
2446; CHECK-LABEL: @diff_of_squares_nuw(
2447; CHECK-NEXT:    [[ADD:%.*]] = add nuw i5 [[X:%.*]], [[Y:%.*]]
2448; CHECK-NEXT:    [[SUB:%.*]] = sub nuw i5 [[X]], [[Y]]
2449; CHECK-NEXT:    [[R:%.*]] = mul nuw i5 [[ADD]], [[SUB]]
2450; CHECK-NEXT:    ret i5 [[R]]
2451;
2452  %x2 = mul nuw i5 %x, %x
2453  %y2 = mul nuw i5 %y, %y
2454  %r = sub nuw i5 %x2, %y2
2455  ret i5 %r
2456}
2457
2458; All-or-nothing for propagation of no-wrap flags (possibly conservative)
2459
2460define i5 @diff_of_squares_partial_nuw(i5 %x, i5 %y) {
2461; CHECK-LABEL: @diff_of_squares_partial_nuw(
2462; CHECK-NEXT:    [[ADD:%.*]] = add i5 [[X:%.*]], [[Y:%.*]]
2463; CHECK-NEXT:    [[SUB:%.*]] = sub i5 [[X]], [[Y]]
2464; CHECK-NEXT:    [[R:%.*]] = mul i5 [[ADD]], [[SUB]]
2465; CHECK-NEXT:    ret i5 [[R]]
2466;
2467  %x2 = mul nuw i5 %x, %x
2468  %y2 = mul nuw i5 %y, %y
2469  %r = sub i5 %x2, %y2
2470  ret i5 %r
2471}
2472
2473; All-or-nothing for propagation of no-wrap flags (possibly conservative)
2474
2475define <2 x i5> @diff_of_squares_nsw(<2 x i5> %x, <2 x i5> %y) {
2476; CHECK-LABEL: @diff_of_squares_nsw(
2477; CHECK-NEXT:    [[ADD:%.*]] = add nsw <2 x i5> [[X:%.*]], [[Y:%.*]]
2478; CHECK-NEXT:    [[SUB:%.*]] = sub nsw <2 x i5> [[X]], [[Y]]
2479; CHECK-NEXT:    [[R:%.*]] = mul nsw <2 x i5> [[ADD]], [[SUB]]
2480; CHECK-NEXT:    ret <2 x i5> [[R]]
2481;
2482  %x2 = mul nsw <2 x i5> %x, %x
2483  %y2 = mul nsw <2 x i5> %y, %y
2484  %r = sub nsw <2 x i5> %x2, %y2
2485  ret <2 x i5> %r
2486}
2487
2488; All-or-nothing for propagation of no-wrap flags (possibly conservative)
2489
2490define <2 x i5> @diff_of_squares_partial_nsw(<2 x i5> %x, <2 x i5> %y) {
2491; CHECK-LABEL: @diff_of_squares_partial_nsw(
2492; CHECK-NEXT:    [[ADD:%.*]] = add <2 x i5> [[X:%.*]], [[Y:%.*]]
2493; CHECK-NEXT:    [[SUB:%.*]] = sub <2 x i5> [[X]], [[Y]]
2494; CHECK-NEXT:    [[R:%.*]] = mul <2 x i5> [[ADD]], [[SUB]]
2495; CHECK-NEXT:    ret <2 x i5> [[R]]
2496;
2497  %x2 = mul nsw <2 x i5> %x, %x
2498  %y2 = mul <2 x i5> %y, %y
2499  %r = sub nsw <2 x i5> %x2, %y2
2500  ret <2 x i5> %r
2501}
2502
2503define i1 @diff_of_squares_nsw_i1(i1 %x, i1 %y) {
2504; CHECK-LABEL: @diff_of_squares_nsw_i1(
2505; CHECK-NEXT:    ret i1 false
2506;
2507  %x2 = mul nsw i1 %x, %x
2508  %y2 = mul nsw i1 %y, %y
2509  %r = sub nsw i1 %x2, %y2
2510  ret i1 %r
2511}
2512
2513define i1 @diff_of_squares_nuw_i1(i1 %x, i1 %y) {
2514; CHECK-LABEL: @diff_of_squares_nuw_i1(
2515; CHECK-NEXT:    [[R:%.*]] = xor i1 [[Y:%.*]], [[X:%.*]]
2516; CHECK-NEXT:    ret i1 [[R]]
2517;
2518  %x2 = mul nuw i1 %x, %x
2519  %y2 = mul nuw i1 %y, %y
2520  %r = sub nuw i1 %x2, %y2
2521  ret i1 %r
2522}
2523
2524; It is not correct to propagate nsw.
2525; TODO: This should reduce more.
2526
2527define i2 @diff_of_squares_nsw_i2(i2 %x, i2 %y) {
2528; CHECK-LABEL: @diff_of_squares_nsw_i2(
2529; CHECK-NEXT:    [[ADD:%.*]] = add i2 [[X:%.*]], [[Y:%.*]]
2530; CHECK-NEXT:    [[SUB:%.*]] = sub i2 [[X]], [[Y]]
2531; CHECK-NEXT:    [[R:%.*]] = mul i2 [[ADD]], [[SUB]]
2532; CHECK-NEXT:    ret i2 [[R]]
2533;
2534  %x2 = mul nsw i2 %x, %x
2535  %y2 = mul nsw i2 %y, %y
2536  %r = sub nsw i2 %x2, %y2
2537  ret i2 %r
2538}
2539
2540; TODO: This should reduce more.
2541
2542define i2 @diff_of_squares_nuw_i2(i2 %x, i2 %y) {
2543; CHECK-LABEL: @diff_of_squares_nuw_i2(
2544; CHECK-NEXT:    [[ADD:%.*]] = add nuw i2 [[X:%.*]], [[Y:%.*]]
2545; CHECK-NEXT:    [[SUB:%.*]] = sub nuw i2 [[X]], [[Y]]
2546; CHECK-NEXT:    [[R:%.*]] = mul nuw i2 [[ADD]], [[SUB]]
2547; CHECK-NEXT:    ret i2 [[R]]
2548;
2549  %x2 = mul nuw i2 %x, %x
2550  %y2 = mul nuw i2 %y, %y
2551  %r = sub nuw i2 %x2, %y2
2552  ret i2 %r
2553}
2554
2555; negative test
2556
2557define i8 @diff_of_squares_use1(i8 %x, i8 %y) {
2558; CHECK-LABEL: @diff_of_squares_use1(
2559; CHECK-NEXT:    [[X2:%.*]] = mul i8 [[X:%.*]], [[X]]
2560; CHECK-NEXT:    call void @use8(i8 [[X2]])
2561; CHECK-NEXT:    [[Y2:%.*]] = mul i8 [[Y:%.*]], [[Y]]
2562; CHECK-NEXT:    [[R:%.*]] = sub i8 [[X2]], [[Y2]]
2563; CHECK-NEXT:    ret i8 [[R]]
2564;
2565  %x2 = mul i8 %x, %x
2566  call void @use8(i8 %x2)
2567  %y2 = mul i8 %y, %y
2568  %r = sub i8 %x2, %y2
2569  ret i8 %r
2570}
2571
2572; negative test
2573
2574define i8 @diff_of_squares_use2(i8 %x, i8 %y) {
2575; CHECK-LABEL: @diff_of_squares_use2(
2576; CHECK-NEXT:    [[X2:%.*]] = mul i8 [[X:%.*]], [[X]]
2577; CHECK-NEXT:    [[Y2:%.*]] = mul i8 [[Y:%.*]], [[Y]]
2578; CHECK-NEXT:    call void @use8(i8 [[Y2]])
2579; CHECK-NEXT:    [[R:%.*]] = sub i8 [[X2]], [[Y2]]
2580; CHECK-NEXT:    ret i8 [[R]]
2581;
2582  %x2 = mul i8 %x, %x
2583  %y2 = mul i8 %y, %y
2584  call void @use8(i8 %y2)
2585  %r = sub i8 %x2, %y2
2586  ret i8 %r
2587}
2588
2589; negative test - must be squares
2590
2591define i8 @diff_of_muls1(i8 %x, i8 %y, i8 %z) {
2592; CHECK-LABEL: @diff_of_muls1(
2593; CHECK-NEXT:    [[M:%.*]] = mul i8 [[X:%.*]], [[Z:%.*]]
2594; CHECK-NEXT:    [[Y2:%.*]] = mul i8 [[Y:%.*]], [[Y]]
2595; CHECK-NEXT:    [[R:%.*]] = sub i8 [[M]], [[Y2]]
2596; CHECK-NEXT:    ret i8 [[R]]
2597;
2598  %m = mul i8 %x, %z
2599  %y2 = mul i8 %y, %y
2600  %r = sub i8 %m, %y2
2601  ret i8 %r
2602}
2603
2604; negative test - must be squares
2605
2606define i8 @diff_of_muls2(i8 %x, i8 %y, i8 %z) {
2607; CHECK-LABEL: @diff_of_muls2(
2608; CHECK-NEXT:    [[X2:%.*]] = mul i8 [[X:%.*]], [[X]]
2609; CHECK-NEXT:    [[M:%.*]] = mul i8 [[Y:%.*]], [[Z:%.*]]
2610; CHECK-NEXT:    [[R:%.*]] = sub i8 [[X2]], [[M]]
2611; CHECK-NEXT:    ret i8 [[R]]
2612;
2613  %x2 = mul i8 %x, %x
2614  %m = mul i8 %y, %z
2615  %r = sub i8 %x2, %m
2616  ret i8 %r
2617}
2618
2619define i8 @sub_of_adds_2xz_multiuse(i8 %x, i8 %y, i8 %z) {
2620; CHECK-LABEL: @sub_of_adds_2xz_multiuse(
2621; CHECK-NEXT:    [[XZ:%.*]] = add i8 [[X:%.*]], [[Z:%.*]]
2622; CHECK-NEXT:    [[YZ:%.*]] = add i8 [[Z]], [[Y:%.*]]
2623; CHECK-NEXT:    [[R:%.*]] = sub i8 [[X]], [[Y]]
2624; CHECK-NEXT:    call void @use8(i8 [[XZ]])
2625; CHECK-NEXT:    call void @use8(i8 [[YZ]])
2626; CHECK-NEXT:    ret i8 [[R]]
2627;
2628  %xz = add i8 %x, %z
2629  %yz = add i8 %z, %y
2630  %r = sub i8 %xz, %yz
2631  call void @use8(i8 %xz)
2632  call void @use8(i8 %yz)
2633  ret i8 %r
2634}
2635
2636define i8 @sub_of_adds_2xc_multiuse2_fail(i8 %x, i8 %y) {
2637; CHECK-LABEL: @sub_of_adds_2xc_multiuse2_fail(
2638; CHECK-NEXT:    [[XC:%.*]] = add i8 [[X:%.*]], 10
2639; CHECK-NEXT:    [[YC:%.*]] = add i8 [[Y:%.*]], 11
2640; CHECK-NEXT:    [[R:%.*]] = sub i8 [[XC]], [[YC]]
2641; CHECK-NEXT:    call void @use8(i8 [[XC]])
2642; CHECK-NEXT:    call void @use8(i8 [[YC]])
2643; CHECK-NEXT:    ret i8 [[R]]
2644;
2645  %xc = add i8 %x, 10
2646  %yc = add i8 %y, 11
2647  %r = sub i8 %xc, %yc
2648  call void @use8(i8 %xc)
2649  call void @use8(i8 %yc)
2650  ret i8 %r
2651}
2652
2653define i8 @sub_of_adds_2xc(i8 %x, i8 %y) {
2654; CHECK-LABEL: @sub_of_adds_2xc(
2655; CHECK-NEXT:    [[TMP1:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
2656; CHECK-NEXT:    [[R:%.*]] = add i8 [[TMP1]], 2
2657; CHECK-NEXT:    ret i8 [[R]]
2658;
2659  %xc = add i8 %x, 10
2660  %yc = add i8 %y, 8
2661  %r = sub i8 %xc, %yc
2662  ret i8 %r
2663}
2664
2665define i32 @sub_infer_nuw_from_domcond(i32 %x, i32 %y) {
2666; CHECK-LABEL: @sub_infer_nuw_from_domcond(
2667; CHECK-NEXT:    [[COND_NOT:%.*]] = icmp ult i32 [[X:%.*]], [[Y:%.*]]
2668; CHECK-NEXT:    br i1 [[COND_NOT]], label [[IF_ELSE:%.*]], label [[IF_THEN:%.*]]
2669; CHECK:       if.then:
2670; CHECK-NEXT:    [[SUB:%.*]] = sub nuw i32 [[X]], [[Y]]
2671; CHECK-NEXT:    ret i32 [[SUB]]
2672; CHECK:       if.else:
2673; CHECK-NEXT:    ret i32 0
2674;
2675  %cond = icmp uge i32 %x, %y
2676  br i1 %cond, label %if.then, label %if.else
2677
2678if.then:
2679  %sub = sub i32 %x, %y
2680  ret i32 %sub
2681
2682if.else:
2683  ret i32 0
2684}
2685
2686define i1 @sub_infer_nuw_from_domcond_fold1(i32 %x, i32 %y) {
2687; CHECK-LABEL: @sub_infer_nuw_from_domcond_fold1(
2688; CHECK-NEXT:    [[COND_NOT:%.*]] = icmp ult i32 [[X:%.*]], [[Y:%.*]]
2689; CHECK-NEXT:    br i1 [[COND_NOT]], label [[IF_ELSE:%.*]], label [[IF_THEN:%.*]]
2690; CHECK:       if.then:
2691; CHECK-NEXT:    ret i1 false
2692; CHECK:       if.else:
2693; CHECK-NEXT:    ret i1 false
2694;
2695  %cond = icmp uge i32 %x, %y
2696  br i1 %cond, label %if.then, label %if.else
2697
2698if.then:
2699  %ext0 = zext i32 %y to i64
2700  %ext1 = zext i32 %x to i64
2701  %sub = sub i32 %x, %y
2702  %ext2 = zext i32 %sub to i64
2703  %add = add nuw nsw i64 %ext2, %ext0
2704  %cmp = icmp ugt i64 %add, %ext1
2705  ret i1 %cmp
2706
2707if.else:
2708  ret i1 false
2709}
2710
2711define i64 @sub_infer_nuw_from_domcond_fold2(i32 range(i32 0, 2147483648) %x, i32 range(i32 0, 2147483648) %y) {
2712; CHECK-LABEL: @sub_infer_nuw_from_domcond_fold2(
2713; CHECK-NEXT:    [[COND_NOT:%.*]] = icmp samesign ult i32 [[X:%.*]], [[Y:%.*]]
2714; CHECK-NEXT:    br i1 [[COND_NOT]], label [[IF_ELSE:%.*]], label [[IF_THEN:%.*]]
2715; CHECK:       if.then:
2716; CHECK-NEXT:    [[SUB:%.*]] = sub nuw nsw i32 [[X]], [[Y]]
2717; CHECK-NEXT:    [[EXT:%.*]] = zext nneg i32 [[SUB]] to i64
2718; CHECK-NEXT:    ret i64 [[EXT]]
2719; CHECK:       if.else:
2720; CHECK-NEXT:    ret i64 0
2721;
2722  %cond = icmp uge i32 %x, %y
2723  br i1 %cond, label %if.then, label %if.else
2724
2725if.then:
2726  %sub = sub i32 %x, %y
2727  %ext = zext i32 %sub to i64
2728  ret i64 %ext
2729
2730if.else:
2731  ret i64 0
2732}
2733
2734define i1 @sub_infer_nuw_from_domcond_fold3(i16 %xx, i32 range(i32 0, 12) %y) {
2735; CHECK-LABEL: @sub_infer_nuw_from_domcond_fold3(
2736; CHECK-NEXT:    [[X:%.*]] = zext i16 [[XX:%.*]] to i32
2737; CHECK-NEXT:    [[COND:%.*]] = icmp samesign ugt i32 [[Y:%.*]], [[X]]
2738; CHECK-NEXT:    br i1 [[COND]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
2739; CHECK:       if.then:
2740; CHECK-NEXT:    ret i1 false
2741; CHECK:       if.else:
2742; CHECK-NEXT:    ret i1 false
2743;
2744  %x = zext i16 %xx to i32
2745  %cond = icmp ult i32 %x, %y
2746  br i1 %cond, label %if.then, label %if.else
2747
2748if.then:
2749  %sub = sub nsw i32 %y, %x
2750  %cmp = icmp eq i32 %sub, -1
2751  ret i1 %cmp
2752
2753if.else:
2754  ret i1 false
2755}
2756
2757; negative tests
2758
2759define i32 @sub_infer_nuw_from_domcond_wrong_pred(i32 %x, i32 %y) {
2760; CHECK-LABEL: @sub_infer_nuw_from_domcond_wrong_pred(
2761; CHECK-NEXT:    [[COND_NOT:%.*]] = icmp slt i32 [[X:%.*]], [[Y:%.*]]
2762; CHECK-NEXT:    br i1 [[COND_NOT]], label [[IF_ELSE:%.*]], label [[IF_THEN:%.*]]
2763; CHECK:       if.then:
2764; CHECK-NEXT:    [[SUB:%.*]] = sub i32 [[X]], [[Y]]
2765; CHECK-NEXT:    ret i32 [[SUB]]
2766; CHECK:       if.else:
2767; CHECK-NEXT:    ret i32 0
2768;
2769  %cond = icmp sge i32 %x, %y
2770  br i1 %cond, label %if.then, label %if.else
2771
2772if.then:
2773  %sub = sub i32 %x, %y
2774  ret i32 %sub
2775
2776if.else:
2777  ret i32 0
2778}
2779
2780define i32 @sub_infer_nuw_from_domcond_lhs_is_false(i32 %x, i32 %y) {
2781; CHECK-LABEL: @sub_infer_nuw_from_domcond_lhs_is_false(
2782; CHECK-NEXT:    [[COND_NOT:%.*]] = icmp ult i32 [[X:%.*]], [[Y:%.*]]
2783; CHECK-NEXT:    br i1 [[COND_NOT]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
2784; CHECK:       if.then:
2785; CHECK-NEXT:    [[SUB:%.*]] = sub i32 [[X]], [[Y]]
2786; CHECK-NEXT:    ret i32 [[SUB]]
2787; CHECK:       if.else:
2788; CHECK-NEXT:    ret i32 0
2789;
2790  %cond = icmp uge i32 %x, %y
2791  br i1 %cond, label %if.else, label %if.then
2792
2793if.then:
2794  %sub = sub i32 %x, %y
2795  ret i32 %sub
2796
2797if.else:
2798  ret i32 0
2799}
2800
2801define i32 @fold_sub_and_into_andn(i32 %x) {
2802; CHECK-LABEL: @fold_sub_and_into_andn(
2803; CHECK-NEXT:  entry:
2804; CHECK-NEXT:    [[TMP0:%.*]] = and i32 [[X:%.*]], 63
2805; CHECK-NEXT:    [[AND:%.*]] = xor i32 [[TMP0]], 63
2806; CHECK-NEXT:    ret i32 [[AND]]
2807;
2808entry:
2809  %sub = sub i32 63, %x
2810  %and = and i32 %sub, 63
2811  ret i32 %and
2812}
2813
2814define i1 @fold_sub_and_into_andn_icmp(i32 %x) {
2815; CHECK-LABEL: @fold_sub_and_into_andn_icmp(
2816; CHECK-NEXT:  entry:
2817; CHECK-NEXT:    [[TMP0:%.*]] = and i32 [[X:%.*]], 63
2818; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[TMP0]], 63
2819; CHECK-NEXT:    ret i1 [[CMP]]
2820;
2821entry:
2822  %sub = sub i32 63, %x
2823  %and = and i32 %sub, 63
2824  %cmp = icmp eq i32 %and, 0
2825  ret i1 %cmp
2826}
2827
2828define i32 @fold_sub_and_into_andn_subset(i32 %x) {
2829; CHECK-LABEL: @fold_sub_and_into_andn_subset(
2830; CHECK-NEXT:  entry:
2831; CHECK-NEXT:    [[TMP0:%.*]] = and i32 [[X:%.*]], 31
2832; CHECK-NEXT:    [[AND:%.*]] = xor i32 [[TMP0]], 31
2833; CHECK-NEXT:    ret i32 [[AND]]
2834;
2835entry:
2836  %sub = sub i32 63, %x
2837  %and = and i32 %sub, 31
2838  ret i32 %and
2839}
2840
2841; Negative tests
2842
2843define i32 @fold_sub_and_into_andn_nonmask(i32 %x, i32 %y) {
2844; CHECK-LABEL: @fold_sub_and_into_andn_nonmask(
2845; CHECK-NEXT:  entry:
2846; CHECK-NEXT:    [[SUB:%.*]] = sub i32 [[Y:%.*]], [[X:%.*]]
2847; CHECK-NEXT:    [[AND:%.*]] = and i32 [[SUB]], 63
2848; CHECK-NEXT:    ret i32 [[AND]]
2849;
2850entry:
2851  %sub = sub i32 %y, %x
2852  %and = and i32 %sub, 63
2853  ret i32 %and
2854}
2855
2856define i32 @fold_sub_and_into_andn_superset(i32 %x) {
2857; CHECK-LABEL: @fold_sub_and_into_andn_superset(
2858; CHECK-NEXT:  entry:
2859; CHECK-NEXT:    [[SUB:%.*]] = sub i32 63, [[X:%.*]]
2860; CHECK-NEXT:    [[AND:%.*]] = and i32 [[SUB]], 127
2861; CHECK-NEXT:    ret i32 [[AND]]
2862;
2863entry:
2864  %sub = sub i32 63, %x
2865  %and = and i32 %sub, 127
2866  ret i32 %and
2867}
2868