1 ; This test makes sure that these instructions are properly eliminated. 2 ; RUN: opt < %s -instcombine -S | FileCheck %s 3 4 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" 5 6 define i32 @test1(i32 %A) { 7 %B = or i32 %A, 0 8 ret i32 %B 9 ; CHECK-LABEL: @test1( 10 ; CHECK: ret i32 %A 11 } 12 13 define i32 @test2(i32 %A) { 14 %B = or i32 %A, -1 15 ret i32 %B 16 ; CHECK-LABEL: @test2( 17 ; CHECK: ret i32 -1 18 } 19 20 define i8 @test2a(i8 %A) { 21 %B = or i8 %A, -1 22 ret i8 %B 23 ; CHECK-LABEL: @test2a( 24 ; CHECK: ret i8 -1 25 } 26 27 define i1 @test3(i1 %A) { 28 %B = or i1 %A, false 29 ret i1 %B 30 ; CHECK-LABEL: @test3( 31 ; CHECK: ret i1 %A 32 } 33 34 define i1 @test4(i1 %A) { 35 %B = or i1 %A, true 36 ret i1 %B 37 ; CHECK-LABEL: @test4( 38 ; CHECK: ret i1 true 39 } 40 41 define i1 @test5(i1 %A) { 42 %B = or i1 %A, %A 43 ret i1 %B 44 ; CHECK-LABEL: @test5( 45 ; CHECK: ret i1 %A 46 } 47 48 define i32 @test6(i32 %A) { 49 %B = or i32 %A, %A 50 ret i32 %B 51 ; CHECK-LABEL: @test6( 52 ; CHECK: ret i32 %A 53 } 54 55 ; A | ~A == -1 56 define i32 @test7(i32 %A) { 57 %NotA = xor i32 -1, %A 58 %B = or i32 %A, %NotA 59 ret i32 %B 60 ; CHECK-LABEL: @test7( 61 ; CHECK: ret i32 -1 62 } 63 64 define i8 @test8(i8 %A) { 65 %B = or i8 %A, -2 66 %C = or i8 %B, 1 67 ret i8 %C 68 ; CHECK-LABEL: @test8( 69 ; CHECK: ret i8 -1 70 } 71 72 ; Test that (A|c1)|(B|c2) == (A|B)|(c1|c2) 73 define i8 @test9(i8 %A, i8 %B) { 74 %C = or i8 %A, 1 75 %D = or i8 %B, -2 76 %E = or i8 %C, %D 77 ret i8 %E 78 ; CHECK-LABEL: @test9( 79 ; CHECK: ret i8 -1 80 } 81 82 define i8 @test10(i8 %A) { 83 %B = or i8 %A, 1 84 %C = and i8 %B, -2 85 ; (X & C1) | C2 --> (X | C2) & (C1|C2) 86 %D = or i8 %C, -2 87 ret i8 %D 88 ; CHECK-LABEL: @test10( 89 ; CHECK: ret i8 -2 90 } 91 92 define i8 @test11(i8 %A) { 93 %B = or i8 %A, -2 94 %C = xor i8 %B, 13 95 ; (X ^ C1) | C2 --> (X | C2) ^ (C1&~C2) 96 %D = or i8 %C, 1 97 %E = xor i8 %D, 12 98 ret i8 %E 99 ; CHECK-LABEL: @test11( 100 ; CHECK: ret i8 -1 101 } 102 103 define i32 @test12(i32 %A) { 104 ; Should be eliminated 105 %B = or i32 %A, 4 106 %C = and i32 %B, 8 107 ret i32 %C 108 ; CHECK-LABEL: @test12( 109 ; CHECK: %C = and i32 %A, 8 110 ; CHECK: ret i32 %C 111 } 112 113 define i32 @test13(i32 %A) { 114 %B = or i32 %A, 12 115 ; Always equal to 8 116 %C = and i32 %B, 8 117 ret i32 %C 118 ; CHECK-LABEL: @test13( 119 ; CHECK: ret i32 8 120 } 121 122 define i1 @test14(i32 %A, i32 %B) { 123 %C1 = icmp ult i32 %A, %B 124 %C2 = icmp ugt i32 %A, %B 125 ; (A < B) | (A > B) === A != B 126 %D = or i1 %C1, %C2 127 ret i1 %D 128 ; CHECK-LABEL: @test14( 129 ; CHECK: icmp ne i32 %A, %B 130 ; CHECK: ret i1 131 } 132 133 define i1 @test15(i32 %A, i32 %B) { 134 %C1 = icmp ult i32 %A, %B 135 %C2 = icmp eq i32 %A, %B 136 ; (A < B) | (A == B) === A <= B 137 %D = or i1 %C1, %C2 138 ret i1 %D 139 ; CHECK-LABEL: @test15( 140 ; CHECK: icmp ule i32 %A, %B 141 ; CHECK: ret i1 142 } 143 144 define i32 @test16(i32 %A) { 145 %B = and i32 %A, 1 146 ; -2 = ~1 147 %C = and i32 %A, -2 148 ; %D = and int %B, -1 == %B 149 %D = or i32 %B, %C 150 ret i32 %D 151 ; CHECK-LABEL: @test16( 152 ; CHECK: ret i32 %A 153 } 154 155 define i32 @test17(i32 %A) { 156 %B = and i32 %A, 1 157 %C = and i32 %A, 4 158 ; %D = and int %B, 5 159 %D = or i32 %B, %C 160 ret i32 %D 161 ; CHECK-LABEL: @test17( 162 ; CHECK: %D = and i32 %A, 5 163 ; CHECK: ret i32 %D 164 } 165 166 define i1 @test18(i32 %A) { 167 %B = icmp sge i32 %A, 100 168 %C = icmp slt i32 %A, 50 169 ;; (A-50) >u 50 170 %D = or i1 %B, %C 171 ret i1 %D 172 ; CHECK-LABEL: @test18( 173 ; CHECK: add i32 174 ; CHECK: icmp ugt 175 ; CHECK: ret i1 176 } 177 178 define i1 @test19(i32 %A) { 179 %B = icmp eq i32 %A, 50 180 %C = icmp eq i32 %A, 51 181 ;; (A&-2) == 50 182 %D = or i1 %B, %C 183 ret i1 %D 184 ; CHECK-LABEL: @test19( 185 ; CHECK: and i32 186 ; CHECK: icmp eq 187 ; CHECK: ret i1 188 } 189 190 define i32 @test20(i32 %x) { 191 %y = and i32 %x, 123 192 %z = or i32 %y, %x 193 ret i32 %z 194 ; CHECK-LABEL: @test20( 195 ; CHECK: ret i32 %x 196 } 197 198 define i32 @test21(i32 %tmp.1) { 199 %tmp.1.mask1 = add i32 %tmp.1, 2 200 %tmp.3 = and i32 %tmp.1.mask1, -2 201 %tmp.5 = and i32 %tmp.1, 1 202 ;; add tmp.1, 2 203 %tmp.6 = or i32 %tmp.5, %tmp.3 204 ret i32 %tmp.6 205 ; CHECK-LABEL: @test21( 206 ; CHECK: add i32 %{{[^,]*}}, 2 207 ; CHECK: ret i32 208 } 209 210 define i32 @test22(i32 %B) { 211 %ELIM41 = and i32 %B, 1 212 %ELIM7 = and i32 %B, -2 213 %ELIM5 = or i32 %ELIM41, %ELIM7 214 ret i32 %ELIM5 215 ; CHECK-LABEL: @test22( 216 ; CHECK: ret i32 %B 217 } 218 219 define i16 @test23(i16 %A) { 220 %B = lshr i16 %A, 1 221 ;; fold or into xor 222 %C = or i16 %B, -32768 223 %D = xor i16 %C, 8193 224 ret i16 %D 225 ; CHECK-LABEL: @test23( 226 ; CHECK: %B = lshr i16 %A, 1 227 ; CHECK: %D = xor i16 %B, -24575 228 ; CHECK: ret i16 %D 229 } 230 231 ; PR1738 232 define i1 @test24(double %X, double %Y) { 233 %tmp9 = fcmp uno double %X, 0.000000e+00 ; <i1> [#uses=1] 234 %tmp13 = fcmp uno double %Y, 0.000000e+00 ; <i1> [#uses=1] 235 %bothcond = or i1 %tmp13, %tmp9 ; <i1> [#uses=1] 236 ret i1 %bothcond 237 238 ; CHECK-LABEL: @test24( 239 ; CHECK: = fcmp uno double %Y, %X 240 ; CHECK: ret i1 241 } 242 243 ; PR3266 & PR5276 244 define i1 @test25(i32 %A, i32 %B) { 245 %C = icmp eq i32 %A, 0 246 %D = icmp eq i32 %B, 57 247 %E = or i1 %C, %D 248 %F = xor i1 %E, -1 249 ret i1 %F 250 251 ; CHECK-LABEL: @test25( 252 ; CHECK: icmp ne i32 %A, 0 253 ; CHECK-NEXT: icmp ne i32 %B, 57 254 ; CHECK-NEXT: %F = and i1 255 ; CHECK-NEXT: ret i1 %F 256 } 257 258 ; PR5634 259 define i1 @test26(i32 %A, i32 %B) { 260 %C1 = icmp eq i32 %A, 0 261 %C2 = icmp eq i32 %B, 0 262 ; (A == 0) & (A == 0) --> (A|B) == 0 263 %D = and i1 %C1, %C2 264 ret i1 %D 265 ; CHECK-LABEL: @test26( 266 ; CHECK: or i32 %A, %B 267 ; CHECK: icmp eq i32 {{.*}}, 0 268 ; CHECK: ret i1 269 } 270 271 define i1 @test27(i32* %A, i32* %B) { 272 %C1 = ptrtoint i32* %A to i32 273 %C2 = ptrtoint i32* %B to i32 274 %D = or i32 %C1, %C2 275 %E = icmp eq i32 %D, 0 276 ret i1 %E 277 ; CHECK-LABEL: @test27( 278 ; CHECK: icmp eq i32* %A, null 279 ; CHECK: icmp eq i32* %B, null 280 ; CHECK: and i1 281 ; CHECK: ret i1 282 } 283 284 ; PR5634 285 define i1 @test28(i32 %A, i32 %B) { 286 %C1 = icmp ne i32 %A, 0 287 %C2 = icmp ne i32 %B, 0 288 ; (A != 0) | (A != 0) --> (A|B) != 0 289 %D = or i1 %C1, %C2 290 ret i1 %D 291 ; CHECK-LABEL: @test28( 292 ; CHECK: or i32 %A, %B 293 ; CHECK: icmp ne i32 {{.*}}, 0 294 ; CHECK: ret i1 295 } 296 297 define i1 @test29(i32* %A, i32* %B) { 298 %C1 = ptrtoint i32* %A to i32 299 %C2 = ptrtoint i32* %B to i32 300 %D = or i32 %C1, %C2 301 %E = icmp ne i32 %D, 0 302 ret i1 %E 303 ; CHECK-LABEL: @test29( 304 ; CHECK: icmp ne i32* %A, null 305 ; CHECK: icmp ne i32* %B, null 306 ; CHECK: or i1 307 ; CHECK: ret i1 308 } 309 310 ; PR4216 311 define i32 @test30(i32 %A) { 312 entry: 313 %B = or i32 %A, 32962 314 %C = and i32 %A, -65536 315 %D = and i32 %B, 40186 316 %E = or i32 %D, %C 317 ret i32 %E 318 ; CHECK-LABEL: @test30( 319 ; CHECK: %D = and i32 %A, -58312 320 ; CHECK: %E = or i32 %D, 32962 321 ; CHECK: ret i32 %E 322 } 323 324 ; PR4216 325 define i64 @test31(i64 %A) nounwind readnone ssp noredzone { 326 %B = or i64 %A, 194 327 %D = and i64 %B, 250 328 329 %C = or i64 %A, 32768 330 %E = and i64 %C, 4294941696 331 332 %F = or i64 %D, %E 333 ret i64 %F 334 ; CHECK-LABEL: @test31( 335 ; CHECK-NEXT: %E = and i64 %A, 4294908984 336 ; CHECK-NEXT: %F = or i64 %E, 32962 337 ; CHECK-NEXT: ret i64 %F 338 } 339 340 define <4 x i32> @test32(<4 x i1> %and.i1352, <4 x i32> %vecinit6.i176, <4 x i32> %vecinit6.i191) { 341 %and.i135 = sext <4 x i1> %and.i1352 to <4 x i32> ; <<4 x i32>> [#uses=2] 342 %and.i129 = and <4 x i32> %vecinit6.i176, %and.i135 ; <<4 x i32>> [#uses=1] 343 %neg.i = xor <4 x i32> %and.i135, <i32 -1, i32 -1, i32 -1, i32 -1> ; <<4 x i32>> [#uses=1] 344 %and.i = and <4 x i32> %vecinit6.i191, %neg.i ; <<4 x i32>> [#uses=1] 345 %or.i = or <4 x i32> %and.i, %and.i129 ; <<4 x i32>> [#uses=1] 346 ret <4 x i32> %or.i 347 ; codegen is mature enough to handle vector selects. 348 ; CHECK-LABEL: @test32( 349 ; CHECK: select <4 x i1> %and.i1352, <4 x i32> %vecinit6.i176, <4 x i32> %vecinit6.i191 350 } 351 352 define i1 @test33(i1 %X, i1 %Y) { 353 %a = or i1 %X, %Y 354 %b = or i1 %a, %X 355 ret i1 %b 356 ; CHECK-LABEL: @test33( 357 ; CHECK-NEXT: or i1 %X, %Y 358 ; CHECK-NEXT: ret 359 } 360 361 define i32 @test34(i32 %X, i32 %Y) { 362 %a = or i32 %X, %Y 363 %b = or i32 %Y, %a 364 ret i32 %b 365 ; CHECK-LABEL: @test34( 366 ; CHECK-NEXT: or i32 %X, %Y 367 ; CHECK-NEXT: ret 368 } 369 370 define i32 @test35(i32 %a, i32 %b) { 371 %1 = or i32 %a, 1135 372 %2 = or i32 %1, %b 373 ret i32 %2 374 ; CHECK-LABEL: @test35( 375 ; CHECK-NEXT: or i32 %a, %b 376 ; CHECK-NEXT: or i32 %1, 1135 377 } 378 379 define i1 @test36(i32 %x) { 380 %cmp1 = icmp eq i32 %x, 23 381 %cmp2 = icmp eq i32 %x, 24 382 %ret1 = or i1 %cmp1, %cmp2 383 %cmp3 = icmp eq i32 %x, 25 384 %ret2 = or i1 %ret1, %cmp3 385 ret i1 %ret2 386 ; CHECK-LABEL: @test36( 387 ; CHECK-NEXT: %x.off = add i32 %x, -23 388 ; CHECK-NEXT: icmp ult i32 %x.off, 3 389 ; CHECK-NEXT: ret i1 390 } 391 392 define i32 @test37(i32* %xp, i32 %y) { 393 ; CHECK-LABEL: @test37( 394 ; CHECK: select i1 %tobool, i32 -1, i32 %x 395 %tobool = icmp ne i32 %y, 0 396 %sext = sext i1 %tobool to i32 397 %x = load i32* %xp 398 %or = or i32 %sext, %x 399 ret i32 %or 400 } 401 402 define i32 @test38(i32* %xp, i32 %y) { 403 ; CHECK-LABEL: @test38( 404 ; CHECK: select i1 %tobool, i32 -1, i32 %x 405 %tobool = icmp ne i32 %y, 0 406 %sext = sext i1 %tobool to i32 407 %x = load i32* %xp 408 %or = or i32 %x, %sext 409 ret i32 %or 410 } 411
