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: %D = srem i32 %B, %A
149 define i32 @test16(i32 %A) {
150 %X = sdiv i32 %A, 1123
153 ; CHECK-LABEL: @test16(
154 ; CHECK: %Y = sdiv i32 %A, -1123
158 ; Can't fold subtract here because negation it might oveflow.
160 define i32 @test17(i32 %A) {
162 %C = sdiv i32 %B, 1234
164 ; CHECK-LABEL: @test17(
165 ; CHECK: %B = sub i32 0, %A
166 ; CHECK: %C = sdiv i32 %B, 1234
170 define i64 @test18(i64 %Y) {
171 %tmp.4 = shl i64 %Y, 2
172 %tmp.12 = shl i64 %Y, 2
173 %tmp.8 = sub i64 %tmp.4, %tmp.12
175 ; CHECK-LABEL: @test18(
179 define i32 @test19(i32 %X, i32 %Y) {
183 ; CHECK-LABEL: @test19(
187 define i1 @test20(i32 %g, i32 %h) {
188 %tmp.2 = sub i32 %g, %h
189 %tmp.4 = icmp ne i32 %tmp.2, %g
191 ; CHECK-LABEL: @test20(
192 ; CHECK: %tmp.4 = icmp ne i32 %h, 0
193 ; CHECK: ret i1 %tmp.4
196 define i1 @test21(i32 %g, i32 %h) {
197 %tmp.2 = sub i32 %g, %h
198 %tmp.4 = icmp ne i32 %tmp.2, %g
200 ; CHECK-LABEL: @test21(
201 ; CHECK: %tmp.4 = icmp ne i32 %h, 0
202 ; CHECK: ret i1 %tmp.4
206 define zeroext i1 @test22(i32 %a, i32 %b) nounwind {
207 %tmp2 = sub i32 0, %a
208 %tmp4 = sub i32 0, %b
209 %tmp5 = icmp eq i32 %tmp2, %tmp4
211 ; CHECK-LABEL: @test22(
212 ; CHECK: %tmp5 = icmp eq i32 %b, %a
213 ; CHECK: ret i1 %tmp5
217 define i32 @test23(i8* %P, i64 %A){
218 %B = getelementptr inbounds i8* %P, i64 %A
219 %C = ptrtoint i8* %B to i64
220 %D = trunc i64 %C to i32
221 %E = ptrtoint i8* %P to i64
222 %F = trunc i64 %E to i32
225 ; CHECK-LABEL: @test23(
226 ; CHECK-NEXT: = trunc i64 %A to i32
227 ; CHECK-NEXT: ret i32
230 define i8 @test23_as1(i8 addrspace(1)* %P, i16 %A) {
232 ; CHECK-NEXT: = trunc i16 %A to i8
234 %B = getelementptr inbounds i8 addrspace(1)* %P, i16 %A
235 %C = ptrtoint i8 addrspace(1)* %B to i16
236 %D = trunc i16 %C to i8
237 %E = ptrtoint i8 addrspace(1)* %P to i16
238 %F = trunc i16 %E to i8
243 define i64 @test24(i8* %P, i64 %A){
244 %B = getelementptr inbounds i8* %P, i64 %A
245 %C = ptrtoint i8* %B to i64
246 %E = ptrtoint i8* %P to i64
249 ; CHECK-LABEL: @test24(
250 ; CHECK-NEXT: ret i64 %A
253 define i16 @test24_as1(i8 addrspace(1)* %P, i16 %A) {
255 ; CHECK-NEXT: ret i16 %A
256 %B = getelementptr inbounds i8 addrspace(1)* %P, i16 %A
257 %C = ptrtoint i8 addrspace(1)* %B to i16
258 %E = ptrtoint i8 addrspace(1)* %P to i16
263 define i64 @test24a(i8* %P, i64 %A){
264 %B = getelementptr inbounds i8* %P, i64 %A
265 %C = ptrtoint i8* %B to i64
266 %E = ptrtoint i8* %P to i64
269 ; CHECK-LABEL: @test24a(
270 ; CHECK-NEXT: sub i64 0, %A
271 ; CHECK-NEXT: ret i64
274 define i16 @test24a_as1(i8 addrspace(1)* %P, i16 %A) {
275 ; CHECK: @test24a_as1
276 ; CHECK-NEXT: sub i16 0, %A
277 ; CHECK-NEXT: ret i16
278 %B = getelementptr inbounds i8 addrspace(1)* %P, i16 %A
279 %C = ptrtoint i8 addrspace(1)* %B to i16
280 %E = ptrtoint i8 addrspace(1)* %P to i16
286 @Arr = external global [42 x i16]
288 define i64 @test24b(i8* %P, i64 %A){
289 %B = getelementptr inbounds [42 x i16]* @Arr, i64 0, i64 %A
290 %C = ptrtoint i16* %B to i64
291 %G = sub i64 %C, ptrtoint ([42 x i16]* @Arr to i64)
293 ; CHECK-LABEL: @test24b(
294 ; CHECK-NEXT: shl nuw i64 %A, 1
295 ; CHECK-NEXT: ret i64
299 define i64 @test25(i8* %P, i64 %A){
300 %B = getelementptr inbounds [42 x i16]* @Arr, i64 0, i64 %A
301 %C = ptrtoint i16* %B to i64
302 %G = sub i64 %C, ptrtoint (i16* getelementptr ([42 x i16]* @Arr, i64 1, i64 0) to i64)
304 ; CHECK-LABEL: @test25(
305 ; CHECK-NEXT: shl nuw i64 %A, 1
306 ; CHECK-NEXT: add i64 {{.*}}, -84
307 ; CHECK-NEXT: ret i64
310 @Arr_as1 = external addrspace(1) global [42 x i16]
312 define i16 @test25_as1(i8 addrspace(1)* %P, i64 %A) {
314 ; CHECK-NEXT: %1 = trunc i64 %A to i16
315 ; CHECK-NEXT: shl nuw i16 %1, 1
316 ; CHECK-NEXT: add i16 {{.*}}, -84
317 ; CHECK-NEXT: ret i16
318 %B = getelementptr inbounds [42 x i16] addrspace(1)* @Arr_as1, i64 0, i64 %A
319 %C = ptrtoint i16 addrspace(1)* %B to i16
320 %G = sub i16 %C, ptrtoint (i16 addrspace(1)* getelementptr ([42 x i16] addrspace(1)* @Arr_as1, i64 1, i64 0) to i16)
324 define i32 @test26(i32 %x) {
326 %neg = sub i32 0, %shl
328 ; CHECK-LABEL: @test26(
329 ; CHECK-NEXT: shl i32 -3
330 ; CHECK-NEXT: ret i32
333 define i32 @test27(i32 %x, i32 %y) {
334 %mul = mul i32 %y, -8
335 %sub = sub i32 %x, %mul
337 ; CHECK-LABEL: @test27(
338 ; CHECK-NEXT: shl i32 %y, 3
339 ; CHECK-NEXT: add i32
340 ; CHECK-NEXT: ret i32
343 define i32 @test28(i32 %x, i32 %y, i32 %z) {
345 %mul = mul i32 %neg, %y
346 %sub = sub i32 %x, %mul
348 ; CHECK-LABEL: @test28(
349 ; CHECK-NEXT: mul i32 %z, %y
350 ; CHECK-NEXT: add i32
351 ; CHECK-NEXT: ret i32
354 define i64 @test29(i8* %foo, i64 %i, i64 %j) {
355 %gep1 = getelementptr inbounds i8* %foo, i64 %i
356 %gep2 = getelementptr inbounds i8* %foo, i64 %j
357 %cast1 = ptrtoint i8* %gep1 to i64
358 %cast2 = ptrtoint i8* %gep2 to i64
359 %sub = sub i64 %cast1, %cast2
361 ; CHECK-LABEL: @test29(
362 ; CHECK-NEXT: sub i64 %i, %j
363 ; CHECK-NEXT: ret i64
366 define i64 @test30(i8* %foo, i64 %i, i64 %j) {
367 %bit = bitcast i8* %foo to i32*
368 %gep1 = getelementptr inbounds i32* %bit, i64 %i
369 %gep2 = getelementptr inbounds i8* %foo, i64 %j
370 %cast1 = ptrtoint i32* %gep1 to i64
371 %cast2 = ptrtoint i8* %gep2 to i64
372 %sub = sub i64 %cast1, %cast2
374 ; CHECK-LABEL: @test30(
375 ; CHECK-NEXT: %gep1.idx = shl nuw i64 %i, 2
376 ; CHECK-NEXT: sub i64 %gep1.idx, %j
377 ; CHECK-NEXT: ret i64
380 define i16 @test30_as1(i8 addrspace(1)* %foo, i16 %i, i16 %j) {
381 ; CHECK-LABEL: @test30_as1(
382 ; CHECK-NEXT: %gep1.idx = shl nuw i16 %i, 2
383 ; CHECK-NEXT: sub i16 %gep1.idx, %j
384 ; CHECK-NEXT: ret i16
385 %bit = bitcast i8 addrspace(1)* %foo to i32 addrspace(1)*
386 %gep1 = getelementptr inbounds i32 addrspace(1)* %bit, i16 %i
387 %gep2 = getelementptr inbounds i8 addrspace(1)* %foo, i16 %j
388 %cast1 = ptrtoint i32 addrspace(1)* %gep1 to i16
389 %cast2 = ptrtoint i8 addrspace(1)* %gep2 to i16
390 %sub = sub i16 %cast1, %cast2
394 define <2 x i64> @test31(<2 x i64> %A) {
395 %xor = xor <2 x i64> %A, <i64 -1, i64 -1>
396 %sub = sub <2 x i64> <i64 2, i64 3>, %xor
398 ; CHECK-LABEL: @test31(
399 ; CHECK-NEXT: %sub = add <2 x i64> %A, <i64 3, i64 4>
400 ; CHECK-NEXT: ret <2 x i64> %sub
403 define <2 x i64> @test32(<2 x i64> %A) {
404 %add = add <2 x i64> %A, <i64 -1, i64 -1>
405 %sub = sub <2 x i64> <i64 2, i64 3>, %add
407 ; CHECK-LABEL: @test32(
408 ; CHECK-NEXT: %sub = sub <2 x i64> <i64 3, i64 4>
409 ; CHECK-NEXT: ret <2 x i64> %sub
412 define <2 x i64> @test33(<2 x i1> %A) {
413 %ext = zext <2 x i1> %A to <2 x i64>
414 %sub = sub <2 x i64> zeroinitializer, %ext
416 ; CHECK-LABEL: @test33(
417 ; CHECK-NEXT: %sub = sext <2 x i1> %A to <2 x i64>
418 ; CHECK-NEXT: ret <2 x i64> %sub
421 define <2 x i64> @test34(<2 x i1> %A) {
422 %ext = sext <2 x i1> %A to <2 x i64>
423 %sub = sub <2 x i64> zeroinitializer, %ext
425 ; CHECK-LABEL: @test34(
426 ; CHECK-NEXT: %sub = zext <2 x i1> %A to <2 x i64>
427 ; CHECK-NEXT: ret <2 x i64> %sub
430 define <2 x i64> @test35(<2 x i64> %A) {
431 %mul = mul <2 x i64> %A, <i64 3, i64 4>
432 %sub = sub <2 x i64> %A, %mul
434 ; CHECK-LABEL: @test35(
435 ; CHECK-NEXT: %sub = mul <2 x i64> %A, <i64 -2, i64 -3>
436 ; CHECK-NEXT: ret <2 x i64> %sub
439 define <2 x i64> @test36(<2 x i64> %A) {
440 %shl = shl <2 x i64> %A, <i64 3, i64 4>
441 %sub = sub <2 x i64> %shl, %A
443 ; CHECK-LABEL: @test36(
444 ; CHECK-NEXT: %sub = mul <2 x i64> %A, <i64 7, i64 15>
445 ; CHECK-NEXT: ret <2 x i64> %sub
448 define <2 x i32> @test37(<2 x i32> %A) {
449 %div = sdiv <2 x i32> %A, <i32 -2147483648, i32 -2147483648>
450 %sub = sub nsw <2 x i32> zeroinitializer, %div
452 ; CHECK-LABEL: @test37(
453 ; CHECK-NEXT: [[ICMP:%.*]] = icmp eq <2 x i32> %A, <i32 -2147483648, i32 -2147483648>
454 ; CHECK-NEXT: [[SEXT:%.*]] = sext <2 x i1> [[ICMP]] to <2 x i32>
455 ; CHECK-NEXT: ret <2 x i32> [[SEXT]]
458 define i32 @test38(i32 %A) {
459 %div = sdiv i32 %A, -2147483648
460 %sub = sub nsw i32 0, %div
462 ; CHECK-LABEL: @test38(
463 ; CHECK-NEXT: [[ICMP:%.*]] = icmp eq i32 %A, -2147483648
464 ; CHECK-NEXT: [[SEXT:%.*]] = sext i1 [[ICMP]] to i32
465 ; CHECK-NEXT: ret i32 [[SEXT]]
468 define i32 @test39(i32 %A, i32 %x) {
470 %C = sub nsw i32 %x, %B
472 ; CHECK-LABEL: @test39(
473 ; CHECK: %C = add i32 %x, %A
477 define i16 @test40(i16 %a, i16 %b) {
478 %ashr = ashr i16 %a, 1
479 %ashr1 = ashr i16 %b, 1
480 %sub = sub i16 %ashr, %ashr1
482 ; CHECK-LABEL: @test40(
483 ; CHECK-NEXT: [[ASHR:%.*]] = ashr i16 %a, 1
484 ; CHECK-NEXT: [[ASHR1:%.*]] = ashr i16 %b, 1
485 ; CHECK-NEXT: [[RET:%.*]] = sub nsw i16 [[ASHR]], [[ASHR1]]
486 ; CHECK: ret i16 [[RET]]
489 define i32 @test41(i16 %a, i16 %b) {
490 %conv = sext i16 %a to i32
491 %conv1 = sext i16 %b to i32
492 %sub = sub i32 %conv, %conv1
494 ; CHECK-LABEL: @test41(
495 ; CHECK-NEXT: [[SEXT:%.*]] = sext i16 %a to i32
496 ; CHECK-NEXT: [[SEXT1:%.*]] = sext i16 %b to i32
497 ; CHECK-NEXT: [[RET:%.*]] = sub nsw i32 [[SEXT]], [[SEXT1]]
498 ; CHECK: ret i32 [[RET]]
501 define i4 @test42(i4 %x, i4 %y) {
506 ; CHECK-LABEL: @test42(
507 ; CHECK-NEXT: [[AND:%.*]] = and i4 %y, 7
508 ; CHECK-NEXT: [[AND1:%.*]] = and i4 %x, 7
509 ; CHECK-NEXT: [[RET:%.*]] = sub nsw i4 [[AND]], [[AND1]]
510 ; CHECK: ret i4 [[RET]]
513 define i4 @test43(i4 %x, i4 %y) {
518 ; CHECK-LABEL: @test43(
519 ; CHECK-NEXT: [[OR:%.*]] = or i4 %x, -8
520 ; CHECK-NEXT: [[AND:%.*]] = and i4 %y, 7
521 ; CHECK-NEXT: [[RET:%.*]] = sub nuw i4 [[OR]], [[AND]]
522 ; CHECK: ret i4 [[RET]]
525 define i32 @test44(i32 %x) {
526 %sub = sub nsw i32 %x, 32768
528 ; CHECK-LABEL: @test44(
529 ; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 %x, -32768
530 ; CHECK: ret i32 [[ADD]]