1 target 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 ; RUN: opt < %s -instcombine -S | FileCheck %s
7 define i32 @test1(i32 %A) {
10 ; CHECK-LABEL: @test1(
14 define i32 @test2(i32 %A) {
17 ; CHECK-LABEL: @test2(
21 define i32 @test3(i32 %A) {
25 ; CHECK-LABEL: @test3(
29 define i32 @test4(i32 %A, i32 %x) {
33 ; CHECK-LABEL: @test4(
34 ; CHECK: %C = add i32 %x, %A
38 define i32 @test5(i32 %A, i32 %B, i32 %C) {
42 ; CHECK-LABEL: @test5(
43 ; CHECK: %D1 = sub i32 %C, %B
48 define i32 @test6(i32 %A, i32 %B) {
52 ; CHECK-LABEL: @test6(
53 ; CHECK-NEXT: xor i32 %B, -1
54 ; CHECK-NEXT: %D = and i32
55 ; CHECK-NEXT: ret i32 %D
58 define i32 @test7(i32 %A) {
61 ; CHECK-LABEL: @test7(
62 ; CHECK: %B = xor i32 %A, -1
66 define i32 @test8(i32 %A) {
70 ; CHECK-LABEL: @test8(
71 ; CHECK: %C = shl i32 %A, 3
75 define i32 @test9(i32 %A) {
79 ; CHECK-LABEL: @test9(
80 ; CHECK: %C = mul i32 %A, -2
84 define i32 @test10(i32 %A, i32 %B) {
89 ; CHECK-LABEL: @test10(
90 ; CHECK: %E = mul i32 %A, %B
94 define i32 @test10a(i32 %A) {
98 ; CHECK-LABEL: @test10a(
99 ; CHECK: %E = mul i32 %A, -7
103 define i1 @test11(i8 %A, i8 %B) {
105 %cD = icmp ne i8 %C, 0
107 ; CHECK-LABEL: @test11(
108 ; CHECK: %cD = icmp ne i8 %A, %B
112 define i32 @test12(i32 %A) {
116 ; CHECK-LABEL: @test12(
117 ; CHECK: %C = lshr i32 %A, 31
121 define i32 @test13(i32 %A) {
125 ; CHECK-LABEL: @test13(
126 ; CHECK: %C = ashr i32 %A, 31
130 define i32 @test14(i32 %A) {
132 %C = bitcast i32 %B to i32
135 ; CHECK-LABEL: @test14(
136 ; CHECK: %D = ashr i32 %A, 31
140 define i32 @test15(i32 %A, i32 %B) {
144 ; CHECK-LABEL: @test15(
145 ; CHECK: %[[sub:.*]] = sub i32 0, %A
146 ; CHECK-NEXT: %[[rem:.*]] = srem i32 %B, %[[sub]]
147 ; CHECK: ret i32 %[[rem]]
150 define i32 @test16(i32 %A) {
151 %X = sdiv i32 %A, 1123
154 ; CHECK-LABEL: @test16(
155 ; CHECK: %Y = sdiv i32 %A, -1123
159 ; Can't fold subtract here because negation it might oveflow.
161 define i32 @test17(i32 %A) {
163 %C = sdiv i32 %B, 1234
165 ; CHECK-LABEL: @test17(
166 ; CHECK: %B = sub i32 0, %A
167 ; CHECK: %C = sdiv i32 %B, 1234
171 define i64 @test18(i64 %Y) {
172 %tmp.4 = shl i64 %Y, 2
173 %tmp.12 = shl i64 %Y, 2
174 %tmp.8 = sub i64 %tmp.4, %tmp.12
176 ; CHECK-LABEL: @test18(
180 define i32 @test19(i32 %X, i32 %Y) {
184 ; CHECK-LABEL: @test19(
188 define i1 @test20(i32 %g, i32 %h) {
189 %tmp.2 = sub i32 %g, %h
190 %tmp.4 = icmp ne i32 %tmp.2, %g
192 ; CHECK-LABEL: @test20(
193 ; CHECK: %tmp.4 = icmp ne i32 %h, 0
194 ; CHECK: ret i1 %tmp.4
197 define i1 @test21(i32 %g, i32 %h) {
198 %tmp.2 = sub i32 %g, %h
199 %tmp.4 = icmp ne i32 %tmp.2, %g
201 ; CHECK-LABEL: @test21(
202 ; CHECK: %tmp.4 = icmp ne i32 %h, 0
203 ; CHECK: ret i1 %tmp.4
207 define zeroext i1 @test22(i32 %a, i32 %b) nounwind {
208 %tmp2 = sub i32 0, %a
209 %tmp4 = sub i32 0, %b
210 %tmp5 = icmp eq i32 %tmp2, %tmp4
212 ; CHECK-LABEL: @test22(
213 ; CHECK: %tmp5 = icmp eq i32 %b, %a
214 ; CHECK: ret i1 %tmp5
218 define i32 @test23(i8* %P, i64 %A){
219 %B = getelementptr inbounds i8* %P, i64 %A
220 %C = ptrtoint i8* %B to i64
221 %D = trunc i64 %C to i32
222 %E = ptrtoint i8* %P to i64
223 %F = trunc i64 %E to i32
226 ; CHECK-LABEL: @test23(
227 ; CHECK-NEXT: = trunc i64 %A to i32
228 ; CHECK-NEXT: ret i32
231 define i8 @test23_as1(i8 addrspace(1)* %P, i16 %A) {
233 ; CHECK-NEXT: = trunc i16 %A to i8
235 %B = getelementptr inbounds i8 addrspace(1)* %P, i16 %A
236 %C = ptrtoint i8 addrspace(1)* %B to i16
237 %D = trunc i16 %C to i8
238 %E = ptrtoint i8 addrspace(1)* %P to i16
239 %F = trunc i16 %E to i8
244 define i64 @test24(i8* %P, i64 %A){
245 %B = getelementptr inbounds i8* %P, i64 %A
246 %C = ptrtoint i8* %B to i64
247 %E = ptrtoint i8* %P to i64
250 ; CHECK-LABEL: @test24(
251 ; CHECK-NEXT: ret i64 %A
254 define i16 @test24_as1(i8 addrspace(1)* %P, i16 %A) {
256 ; CHECK-NEXT: ret i16 %A
257 %B = getelementptr inbounds i8 addrspace(1)* %P, i16 %A
258 %C = ptrtoint i8 addrspace(1)* %B to i16
259 %E = ptrtoint i8 addrspace(1)* %P to i16
264 define i64 @test24a(i8* %P, i64 %A){
265 %B = getelementptr inbounds i8* %P, i64 %A
266 %C = ptrtoint i8* %B to i64
267 %E = ptrtoint i8* %P to i64
270 ; CHECK-LABEL: @test24a(
271 ; CHECK-NEXT: sub i64 0, %A
272 ; CHECK-NEXT: ret i64
275 define i16 @test24a_as1(i8 addrspace(1)* %P, i16 %A) {
276 ; CHECK: @test24a_as1
277 ; CHECK-NEXT: sub i16 0, %A
278 ; CHECK-NEXT: ret i16
279 %B = getelementptr inbounds i8 addrspace(1)* %P, i16 %A
280 %C = ptrtoint i8 addrspace(1)* %B to i16
281 %E = ptrtoint i8 addrspace(1)* %P to i16
287 @Arr = external global [42 x i16]
289 define i64 @test24b(i8* %P, i64 %A){
290 %B = getelementptr inbounds [42 x i16]* @Arr, i64 0, i64 %A
291 %C = ptrtoint i16* %B to i64
292 %G = sub i64 %C, ptrtoint ([42 x i16]* @Arr to i64)
294 ; CHECK-LABEL: @test24b(
295 ; CHECK-NEXT: shl nuw i64 %A, 1
296 ; CHECK-NEXT: ret i64
300 define i64 @test25(i8* %P, i64 %A){
301 %B = getelementptr inbounds [42 x i16]* @Arr, i64 0, i64 %A
302 %C = ptrtoint i16* %B to i64
303 %G = sub i64 %C, ptrtoint (i16* getelementptr ([42 x i16]* @Arr, i64 1, i64 0) to i64)
305 ; CHECK-LABEL: @test25(
306 ; CHECK-NEXT: shl nuw i64 %A, 1
307 ; CHECK-NEXT: add i64 {{.*}}, -84
308 ; CHECK-NEXT: ret i64
311 @Arr_as1 = external addrspace(1) global [42 x i16]
313 define i16 @test25_as1(i8 addrspace(1)* %P, i64 %A) {
315 ; CHECK-NEXT: %1 = trunc i64 %A to i16
316 ; CHECK-NEXT: shl nuw i16 %1, 1
317 ; CHECK-NEXT: add i16 {{.*}}, -84
318 ; CHECK-NEXT: ret i16
319 %B = getelementptr inbounds [42 x i16] addrspace(1)* @Arr_as1, i64 0, i64 %A
320 %C = ptrtoint i16 addrspace(1)* %B to i16
321 %G = sub i16 %C, ptrtoint (i16 addrspace(1)* getelementptr ([42 x i16] addrspace(1)* @Arr_as1, i64 1, i64 0) to i16)
325 define i32 @test26(i32 %x) {
327 %neg = sub i32 0, %shl
329 ; CHECK-LABEL: @test26(
330 ; CHECK-NEXT: shl i32 -3
331 ; CHECK-NEXT: ret i32
334 define i32 @test27(i32 %x, i32 %y) {
335 %mul = mul i32 %y, -8
336 %sub = sub i32 %x, %mul
338 ; CHECK-LABEL: @test27(
339 ; CHECK-NEXT: shl i32 %y, 3
340 ; CHECK-NEXT: add i32
341 ; CHECK-NEXT: ret i32
344 define i32 @test28(i32 %x, i32 %y, i32 %z) {
346 %mul = mul i32 %neg, %y
347 %sub = sub i32 %x, %mul
349 ; CHECK-LABEL: @test28(
350 ; CHECK-NEXT: mul i32 %z, %y
351 ; CHECK-NEXT: add i32
352 ; CHECK-NEXT: ret i32
355 define i64 @test29(i8* %foo, i64 %i, i64 %j) {
356 %gep1 = getelementptr inbounds i8* %foo, i64 %i
357 %gep2 = getelementptr inbounds i8* %foo, i64 %j
358 %cast1 = ptrtoint i8* %gep1 to i64
359 %cast2 = ptrtoint i8* %gep2 to i64
360 %sub = sub i64 %cast1, %cast2
362 ; CHECK-LABEL: @test29(
363 ; CHECK-NEXT: sub i64 %i, %j
364 ; CHECK-NEXT: ret i64
367 define i64 @test30(i8* %foo, i64 %i, i64 %j) {
368 %bit = bitcast i8* %foo to i32*
369 %gep1 = getelementptr inbounds i32* %bit, i64 %i
370 %gep2 = getelementptr inbounds i8* %foo, i64 %j
371 %cast1 = ptrtoint i32* %gep1 to i64
372 %cast2 = ptrtoint i8* %gep2 to i64
373 %sub = sub i64 %cast1, %cast2
375 ; CHECK-LABEL: @test30(
376 ; CHECK-NEXT: %gep1.idx = shl nuw i64 %i, 2
377 ; CHECK-NEXT: sub i64 %gep1.idx, %j
378 ; CHECK-NEXT: ret i64
381 define i16 @test30_as1(i8 addrspace(1)* %foo, i16 %i, i16 %j) {
382 ; CHECK-LABEL: @test30_as1(
383 ; CHECK-NEXT: %gep1.idx = shl nuw i16 %i, 2
384 ; CHECK-NEXT: sub i16 %gep1.idx, %j
385 ; CHECK-NEXT: ret i16
386 %bit = bitcast i8 addrspace(1)* %foo to i32 addrspace(1)*
387 %gep1 = getelementptr inbounds i32 addrspace(1)* %bit, i16 %i
388 %gep2 = getelementptr inbounds i8 addrspace(1)* %foo, i16 %j
389 %cast1 = ptrtoint i32 addrspace(1)* %gep1 to i16
390 %cast2 = ptrtoint i8 addrspace(1)* %gep2 to i16
391 %sub = sub i16 %cast1, %cast2
395 define <2 x i64> @test31(<2 x i64> %A) {
396 %xor = xor <2 x i64> %A, <i64 -1, i64 -1>
397 %sub = sub <2 x i64> <i64 2, i64 3>, %xor
399 ; CHECK-LABEL: @test31(
400 ; CHECK-NEXT: %sub = add <2 x i64> %A, <i64 3, i64 4>
401 ; CHECK-NEXT: ret <2 x i64> %sub
404 define <2 x i64> @test32(<2 x i64> %A) {
405 %add = add <2 x i64> %A, <i64 -1, i64 -1>
406 %sub = sub <2 x i64> <i64 2, i64 3>, %add
408 ; CHECK-LABEL: @test32(
409 ; CHECK-NEXT: %sub = sub <2 x i64> <i64 3, i64 4>
410 ; CHECK-NEXT: ret <2 x i64> %sub
413 define <2 x i64> @test33(<2 x i1> %A) {
414 %ext = zext <2 x i1> %A to <2 x i64>
415 %sub = sub <2 x i64> zeroinitializer, %ext
417 ; CHECK-LABEL: @test33(
418 ; CHECK-NEXT: %sub = sext <2 x i1> %A to <2 x i64>
419 ; CHECK-NEXT: ret <2 x i64> %sub
422 define <2 x i64> @test34(<2 x i1> %A) {
423 %ext = sext <2 x i1> %A to <2 x i64>
424 %sub = sub <2 x i64> zeroinitializer, %ext
426 ; CHECK-LABEL: @test34(
427 ; CHECK-NEXT: %sub = zext <2 x i1> %A to <2 x i64>
428 ; CHECK-NEXT: ret <2 x i64> %sub
431 define <2 x i64> @test35(<2 x i64> %A) {
432 %mul = mul <2 x i64> %A, <i64 3, i64 4>
433 %sub = sub <2 x i64> %A, %mul
435 ; CHECK-LABEL: @test35(
436 ; CHECK-NEXT: %sub = mul <2 x i64> %A, <i64 -2, i64 -3>
437 ; CHECK-NEXT: ret <2 x i64> %sub
440 define <2 x i64> @test36(<2 x i64> %A) {
441 %shl = shl <2 x i64> %A, <i64 3, i64 4>
442 %sub = sub <2 x i64> %shl, %A
444 ; CHECK-LABEL: @test36(
445 ; CHECK-NEXT: %sub = mul <2 x i64> %A, <i64 7, i64 15>
446 ; CHECK-NEXT: ret <2 x i64> %sub
449 define <2 x i32> @test37(<2 x i32> %A) {
450 %div = sdiv <2 x i32> %A, <i32 -2147483648, i32 -2147483648>
451 %sub = sub nsw <2 x i32> zeroinitializer, %div
453 ; CHECK-LABEL: @test37(
454 ; CHECK-NEXT: [[ICMP:%.*]] = icmp eq <2 x i32> %A, <i32 -2147483648, i32 -2147483648>
455 ; CHECK-NEXT: [[SEXT:%.*]] = sext <2 x i1> [[ICMP]] to <2 x i32>
456 ; CHECK-NEXT: ret <2 x i32> [[SEXT]]
459 define i32 @test38(i32 %A) {
460 %div = sdiv i32 %A, -2147483648
461 %sub = sub nsw i32 0, %div
463 ; CHECK-LABEL: @test38(
464 ; CHECK-NEXT: [[ICMP:%.*]] = icmp eq i32 %A, -2147483648
465 ; CHECK-NEXT: [[SEXT:%.*]] = sext i1 [[ICMP]] to i32
466 ; CHECK-NEXT: ret i32 [[SEXT]]
469 define i32 @test39(i32 %A, i32 %x) {
471 %C = sub nsw i32 %x, %B
473 ; CHECK-LABEL: @test39(
474 ; CHECK: %C = add i32 %x, %A
478 define i16 @test40(i16 %a, i16 %b) {
479 %ashr = ashr i16 %a, 1
480 %ashr1 = ashr i16 %b, 1
481 %sub = sub i16 %ashr, %ashr1
483 ; CHECK-LABEL: @test40(
484 ; CHECK-NEXT: [[ASHR:%.*]] = ashr i16 %a, 1
485 ; CHECK-NEXT: [[ASHR1:%.*]] = ashr i16 %b, 1
486 ; CHECK-NEXT: [[RET:%.*]] = sub nsw i16 [[ASHR]], [[ASHR1]]
487 ; CHECK: ret i16 [[RET]]
490 define i32 @test41(i16 %a, i16 %b) {
491 %conv = sext i16 %a to i32
492 %conv1 = sext i16 %b to i32
493 %sub = sub i32 %conv, %conv1
495 ; CHECK-LABEL: @test41(
496 ; CHECK-NEXT: [[SEXT:%.*]] = sext i16 %a to i32
497 ; CHECK-NEXT: [[SEXT1:%.*]] = sext i16 %b to i32
498 ; CHECK-NEXT: [[RET:%.*]] = sub nsw i32 [[SEXT]], [[SEXT1]]
499 ; CHECK: ret i32 [[RET]]
502 define i4 @test42(i4 %x, i4 %y) {
507 ; CHECK-LABEL: @test42(
508 ; CHECK-NEXT: [[AND:%.*]] = and i4 %y, 7
509 ; CHECK-NEXT: [[AND1:%.*]] = and i4 %x, 7
510 ; CHECK-NEXT: [[RET:%.*]] = sub nsw i4 [[AND]], [[AND1]]
511 ; CHECK: ret i4 [[RET]]
514 define i4 @test43(i4 %x, i4 %y) {
519 ; CHECK-LABEL: @test43(
520 ; CHECK-NEXT: [[OR:%.*]] = or i4 %x, -8
521 ; CHECK-NEXT: [[AND:%.*]] = and i4 %y, 7
522 ; CHECK-NEXT: [[RET:%.*]] = sub nuw i4 [[OR]], [[AND]]
523 ; CHECK: ret i4 [[RET]]
526 define i32 @test44(i32 %x) {
527 %sub = sub nsw i32 %x, 32768
529 ; CHECK-LABEL: @test44(
530 ; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 %x, -32768
531 ; CHECK: ret i32 [[ADD]]