1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -instcombine -S | FileCheck %s 3 4; PR1822 5 6target datalayout = "e-p:64:64-p1:16:16-p2:32:32:32-p3:64:64:64" 7 8define i32 @test1(i32 %A, i32 %B) { 9; CHECK-LABEL: @test1( 10; CHECK-NEXT: ret i32 [[B:%.*]] 11; 12 %C = select i1 false, i32 %A, i32 %B 13 ret i32 %C 14} 15 16define i32 @test2(i32 %A, i32 %B) { 17; CHECK-LABEL: @test2( 18; CHECK-NEXT: ret i32 [[A:%.*]] 19; 20 %C = select i1 true, i32 %A, i32 %B 21 ret i32 %C 22} 23 24 25define i32 @test3(i1 %C, i32 %I) { 26; CHECK-LABEL: @test3( 27; CHECK-NEXT: ret i32 [[I:%.*]] 28; 29 %V = select i1 %C, i32 %I, i32 %I 30 ret i32 %V 31} 32 33define i1 @test4(i1 %C) { 34; CHECK-LABEL: @test4( 35; CHECK-NEXT: ret i1 [[C:%.*]] 36; 37 %V = select i1 %C, i1 true, i1 false 38 ret i1 %V 39} 40 41define i1 @test5(i1 %C) { 42; CHECK-LABEL: @test5( 43; CHECK-NEXT: [[NOT_C:%.*]] = xor i1 [[C:%.*]], true 44; CHECK-NEXT: ret i1 [[NOT_C]] 45; 46 %V = select i1 %C, i1 false, i1 true 47 ret i1 %V 48} 49 50define i32 @test6(i1 %C) { 51; CHECK-LABEL: @test6( 52; CHECK-NEXT: [[V:%.*]] = zext i1 [[C:%.*]] to i32 53; CHECK-NEXT: ret i32 [[V]] 54; 55 %V = select i1 %C, i32 1, i32 0 56 ret i32 %V 57} 58 59define i1 @trueval_is_true(i1 %C, i1 %X) { 60; CHECK-LABEL: @trueval_is_true( 61; CHECK-NEXT: [[R:%.*]] = or i1 [[C:%.*]], [[X:%.*]] 62; CHECK-NEXT: ret i1 [[R]] 63; 64 %R = select i1 %C, i1 true, i1 %X 65 ret i1 %R 66} 67 68define <2 x i1> @trueval_is_true_vec(<2 x i1> %C, <2 x i1> %X) { 69; CHECK-LABEL: @trueval_is_true_vec( 70; CHECK-NEXT: [[R:%.*]] = or <2 x i1> [[C:%.*]], [[X:%.*]] 71; CHECK-NEXT: ret <2 x i1> [[R]] 72; 73 %R = select <2 x i1> %C, <2 x i1> <i1 true, i1 true>, <2 x i1> %X 74 ret <2 x i1> %R 75} 76 77define <2 x i1> @trueval_is_true_vec_undef_elt(<2 x i1> %C, <2 x i1> %X) { 78; CHECK-LABEL: @trueval_is_true_vec_undef_elt( 79; CHECK-NEXT: [[R:%.*]] = or <2 x i1> [[C:%.*]], [[X:%.*]] 80; CHECK-NEXT: ret <2 x i1> [[R]] 81; 82 %R = select <2 x i1> %C, <2 x i1> <i1 undef, i1 true>, <2 x i1> %X 83 ret <2 x i1> %R 84} 85 86define i1 @test8(i1 %C, i1 %X) { 87; CHECK-LABEL: @test8( 88; CHECK-NEXT: [[R:%.*]] = and i1 [[C:%.*]], [[X:%.*]] 89; CHECK-NEXT: ret i1 [[R]] 90; 91 %R = select i1 %C, i1 %X, i1 false 92 ret i1 %R 93} 94 95define <2 x i1> @test8vec(<2 x i1> %C, <2 x i1> %X) { 96; CHECK-LABEL: @test8vec( 97; CHECK-NEXT: [[R:%.*]] = and <2 x i1> [[C:%.*]], [[X:%.*]] 98; CHECK-NEXT: ret <2 x i1> [[R]] 99; 100 %R = select <2 x i1> %C, <2 x i1> %X, <2 x i1> <i1 false, i1 false> 101 ret <2 x i1> %R 102} 103 104define i1 @test9(i1 %C, i1 %X) { 105; CHECK-LABEL: @test9( 106; CHECK-NEXT: [[NOT_C:%.*]] = xor i1 [[C:%.*]], true 107; CHECK-NEXT: [[R:%.*]] = and i1 [[NOT_C]], [[X:%.*]] 108; CHECK-NEXT: ret i1 [[R]] 109; 110 %R = select i1 %C, i1 false, i1 %X 111 ret i1 %R 112} 113 114define <2 x i1> @test9vec(<2 x i1> %C, <2 x i1> %X) { 115; CHECK-LABEL: @test9vec( 116; CHECK-NEXT: [[NOT_C:%.*]] = xor <2 x i1> [[C:%.*]], <i1 true, i1 true> 117; CHECK-NEXT: [[R:%.*]] = and <2 x i1> [[NOT_C]], [[X:%.*]] 118; CHECK-NEXT: ret <2 x i1> [[R]] 119; 120 %R = select <2 x i1> %C, <2 x i1> <i1 false, i1 false>, <2 x i1> %X 121 ret <2 x i1> %R 122} 123 124define i1 @test10(i1 %C, i1 %X) { 125; CHECK-LABEL: @test10( 126; CHECK-NEXT: [[NOT_C:%.*]] = xor i1 [[C:%.*]], true 127; CHECK-NEXT: [[R:%.*]] = or i1 [[NOT_C]], [[X:%.*]] 128; CHECK-NEXT: ret i1 [[R]] 129; 130 %R = select i1 %C, i1 %X, i1 true 131 ret i1 %R 132} 133 134define <2 x i1> @test10vec(<2 x i1> %C, <2 x i1> %X) { 135; CHECK-LABEL: @test10vec( 136; CHECK-NEXT: [[NOT_C:%.*]] = xor <2 x i1> [[C:%.*]], <i1 true, i1 true> 137; CHECK-NEXT: [[R:%.*]] = or <2 x i1> [[NOT_C]], [[X:%.*]] 138; CHECK-NEXT: ret <2 x i1> [[R]] 139; 140 %R = select <2 x i1> %C, <2 x i1> %X, <2 x i1> <i1 true, i1 true> 141 ret <2 x i1> %R 142} 143 144define i1 @test23(i1 %a, i1 %b) { 145; CHECK-LABEL: @test23( 146; CHECK-NEXT: [[C:%.*]] = and i1 [[A:%.*]], [[B:%.*]] 147; CHECK-NEXT: ret i1 [[C]] 148; 149 %c = select i1 %a, i1 %b, i1 %a 150 ret i1 %c 151} 152 153define <2 x i1> @test23vec(<2 x i1> %a, <2 x i1> %b) { 154; CHECK-LABEL: @test23vec( 155; CHECK-NEXT: [[C:%.*]] = and <2 x i1> [[A:%.*]], [[B:%.*]] 156; CHECK-NEXT: ret <2 x i1> [[C]] 157; 158 %c = select <2 x i1> %a, <2 x i1> %b, <2 x i1> %a 159 ret <2 x i1> %c 160} 161 162define i1 @test24(i1 %a, i1 %b) { 163; CHECK-LABEL: @test24( 164; CHECK-NEXT: [[C:%.*]] = or i1 [[A:%.*]], [[B:%.*]] 165; CHECK-NEXT: ret i1 [[C]] 166; 167 %c = select i1 %a, i1 %a, i1 %b 168 ret i1 %c 169} 170 171define <2 x i1> @test24vec(<2 x i1> %a, <2 x i1> %b) { 172; CHECK-LABEL: @test24vec( 173; CHECK-NEXT: [[C:%.*]] = or <2 x i1> [[A:%.*]], [[B:%.*]] 174; CHECK-NEXT: ret <2 x i1> [[C]] 175; 176 %c = select <2 x i1> %a, <2 x i1> %a, <2 x i1> %b 177 ret <2 x i1> %c 178} 179 180define i1 @test62(i1 %A, i1 %B) { 181; CHECK-LABEL: @test62( 182; CHECK-NEXT: [[NOT:%.*]] = xor i1 [[A:%.*]], true 183; CHECK-NEXT: [[C:%.*]] = and i1 [[NOT]], [[B:%.*]] 184; CHECK-NEXT: ret i1 [[C]] 185; 186 %not = xor i1 %A, true 187 %C = select i1 %A, i1 %not, i1 %B 188 ret i1 %C 189} 190 191define <2 x i1> @test62vec(<2 x i1> %A, <2 x i1> %B) { 192; CHECK-LABEL: @test62vec( 193; CHECK-NEXT: [[NOT:%.*]] = xor <2 x i1> [[A:%.*]], <i1 true, i1 true> 194; CHECK-NEXT: [[C:%.*]] = and <2 x i1> [[NOT]], [[B:%.*]] 195; CHECK-NEXT: ret <2 x i1> [[C]] 196; 197 %not = xor <2 x i1> %A, <i1 true, i1 true> 198 %C = select <2 x i1> %A, <2 x i1> %not, <2 x i1> %B 199 ret <2 x i1> %C 200} 201 202define i1 @test63(i1 %A, i1 %B) { 203; CHECK-LABEL: @test63( 204; CHECK-NEXT: [[NOT:%.*]] = xor i1 [[A:%.*]], true 205; CHECK-NEXT: [[C:%.*]] = or i1 [[NOT]], [[B:%.*]] 206; CHECK-NEXT: ret i1 [[C]] 207; 208 %not = xor i1 %A, true 209 %C = select i1 %A, i1 %B, i1 %not 210 ret i1 %C 211} 212 213define <2 x i1> @test63vec(<2 x i1> %A, <2 x i1> %B) { 214; CHECK-LABEL: @test63vec( 215; CHECK-NEXT: [[NOT:%.*]] = xor <2 x i1> [[A:%.*]], <i1 true, i1 true> 216; CHECK-NEXT: [[C:%.*]] = or <2 x i1> [[NOT]], [[B:%.*]] 217; CHECK-NEXT: ret <2 x i1> [[C]] 218; 219 %not = xor <2 x i1> %A, <i1 true, i1 true> 220 %C = select <2 x i1> %A, <2 x i1> %B, <2 x i1> %not 221 ret <2 x i1> %C 222} 223 224define i32 @test11(i32 %a) { 225; CHECK-LABEL: @test11( 226; CHECK-NEXT: [[C:%.*]] = icmp ne i32 [[A:%.*]], 0 227; CHECK-NEXT: [[R:%.*]] = zext i1 [[C]] to i32 228; CHECK-NEXT: ret i32 [[R]] 229; 230 %C = icmp eq i32 %a, 0 231 %R = select i1 %C, i32 0, i32 1 232 ret i32 %R 233} 234 235define i32 @test12(i1 %cond, i32 %a) { 236; CHECK-LABEL: @test12( 237; CHECK-NEXT: [[B:%.*]] = zext i1 [[COND:%.*]] to i32 238; CHECK-NEXT: [[C:%.*]] = or i32 [[B]], [[A:%.*]] 239; CHECK-NEXT: ret i32 [[C]] 240; 241 %b = or i32 %a, 1 242 %c = select i1 %cond, i32 %b, i32 %a 243 ret i32 %c 244} 245 246define <2 x i32> @test12vec(<2 x i1> %cond, <2 x i32> %a) { 247; CHECK-LABEL: @test12vec( 248; CHECK-NEXT: [[B:%.*]] = zext <2 x i1> [[COND:%.*]] to <2 x i32> 249; CHECK-NEXT: [[C:%.*]] = or <2 x i32> [[B]], [[A:%.*]] 250; CHECK-NEXT: ret <2 x i32> [[C]] 251; 252 %b = or <2 x i32> %a, <i32 1, i32 1> 253 %c = select <2 x i1> %cond, <2 x i32> %b, <2 x i32> %a 254 ret <2 x i32> %c 255} 256 257define i32 @test12a(i1 %cond, i32 %a) { 258; CHECK-LABEL: @test12a( 259; CHECK-NEXT: [[B:%.*]] = zext i1 [[COND:%.*]] to i32 260; CHECK-NEXT: [[C:%.*]] = ashr i32 [[A:%.*]], [[B]] 261; CHECK-NEXT: ret i32 [[C]] 262; 263 %b = ashr i32 %a, 1 264 %c = select i1 %cond, i32 %b, i32 %a 265 ret i32 %c 266} 267 268define <2 x i32> @test12avec(<2 x i1> %cond, <2 x i32> %a) { 269; CHECK-LABEL: @test12avec( 270; CHECK-NEXT: [[B:%.*]] = zext <2 x i1> [[COND:%.*]] to <2 x i32> 271; CHECK-NEXT: [[C:%.*]] = ashr <2 x i32> [[A:%.*]], [[B]] 272; CHECK-NEXT: ret <2 x i32> [[C]] 273; 274 %b = ashr <2 x i32> %a, <i32 1, i32 1> 275 %c = select <2 x i1> %cond, <2 x i32> %b, <2 x i32> %a 276 ret <2 x i32> %c 277} 278 279define i32 @test12b(i1 %cond, i32 %a) { 280; CHECK-LABEL: @test12b( 281; CHECK-NEXT: [[NOT_COND:%.*]] = xor i1 [[COND:%.*]], true 282; CHECK-NEXT: [[B:%.*]] = zext i1 [[NOT_COND]] to i32 283; CHECK-NEXT: [[D:%.*]] = ashr i32 [[A:%.*]], [[B]] 284; CHECK-NEXT: ret i32 [[D]] 285; 286 %b = ashr i32 %a, 1 287 %d = select i1 %cond, i32 %a, i32 %b 288 ret i32 %d 289} 290 291define <2 x i32> @test12bvec(<2 x i1> %cond, <2 x i32> %a) { 292; CHECK-LABEL: @test12bvec( 293; CHECK-NEXT: [[NOT_COND:%.*]] = xor <2 x i1> [[COND:%.*]], <i1 true, i1 true> 294; CHECK-NEXT: [[B:%.*]] = zext <2 x i1> [[NOT_COND]] to <2 x i32> 295; CHECK-NEXT: [[D:%.*]] = ashr <2 x i32> [[A:%.*]], [[B]] 296; CHECK-NEXT: ret <2 x i32> [[D]] 297; 298 %b = ashr <2 x i32> %a, <i32 1, i32 1> 299 %d = select <2 x i1> %cond, <2 x i32> %a, <2 x i32> %b 300 ret <2 x i32> %d 301} 302 303define i32 @test13(i32 %a, i32 %b) { 304; CHECK-LABEL: @test13( 305; CHECK-NEXT: ret i32 [[B:%.*]] 306; 307 %C = icmp eq i32 %a, %b 308 %V = select i1 %C, i32 %a, i32 %b 309 ret i32 %V 310} 311 312define i32 @test13a(i32 %a, i32 %b) { 313; CHECK-LABEL: @test13a( 314; CHECK-NEXT: ret i32 [[A:%.*]] 315; 316 %C = icmp ne i32 %a, %b 317 %V = select i1 %C, i32 %a, i32 %b 318 ret i32 %V 319} 320 321define i32 @test13b(i32 %a, i32 %b) { 322; CHECK-LABEL: @test13b( 323; CHECK-NEXT: ret i32 [[A:%.*]] 324; 325 %C = icmp eq i32 %a, %b 326 %V = select i1 %C, i32 %b, i32 %a 327 ret i32 %V 328} 329 330define i1 @test14a(i1 %C, i32 %X) { 331; CHECK-LABEL: @test14a( 332; CHECK-NEXT: [[R1:%.*]] = icmp slt i32 [[X:%.*]], 1 333; CHECK-NEXT: [[NOT_C:%.*]] = xor i1 [[C:%.*]], true 334; CHECK-NEXT: [[R:%.*]] = or i1 [[R1]], [[NOT_C]] 335; CHECK-NEXT: ret i1 [[R]] 336; 337 %V = select i1 %C, i32 %X, i32 0 338 ; (X < 1) | !C 339 %R = icmp slt i32 %V, 1 340 ret i1 %R 341} 342 343define i1 @test14b(i1 %C, i32 %X) { 344; CHECK-LABEL: @test14b( 345; CHECK-NEXT: [[R1:%.*]] = icmp slt i32 [[X:%.*]], 1 346; CHECK-NEXT: [[R:%.*]] = or i1 [[R1]], [[C:%.*]] 347; CHECK-NEXT: ret i1 [[R]] 348; 349 %V = select i1 %C, i32 0, i32 %X 350 ; (X < 1) | C 351 %R = icmp slt i32 %V, 1 352 ret i1 %R 353} 354 355define i32 @test16(i1 %C, i32* %P) { 356; CHECK-LABEL: @test16( 357; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[P:%.*]], align 4 358; CHECK-NEXT: ret i32 [[V]] 359; 360 %P2 = select i1 %C, i32* %P, i32* null 361 %V = load i32, i32* %P2 362 ret i32 %V 363} 364 365;; It may be legal to load from a null address in a non-zero address space 366define i32 @test16_neg(i1 %C, i32 addrspace(1)* %P) { 367; CHECK-LABEL: @test16_neg( 368; CHECK-NEXT: [[P2:%.*]] = select i1 [[C:%.*]], i32 addrspace(1)* [[P:%.*]], i32 addrspace(1)* null 369; CHECK-NEXT: [[V:%.*]] = load i32, i32 addrspace(1)* [[P2]], align 4 370; CHECK-NEXT: ret i32 [[V]] 371; 372 %P2 = select i1 %C, i32 addrspace(1)* %P, i32 addrspace(1)* null 373 %V = load i32, i32 addrspace(1)* %P2 374 ret i32 %V 375} 376 377define i32 @test16_neg2(i1 %C, i32 addrspace(1)* %P) { 378; CHECK-LABEL: @test16_neg2( 379; CHECK-NEXT: [[P2:%.*]] = select i1 [[C:%.*]], i32 addrspace(1)* null, i32 addrspace(1)* [[P:%.*]] 380; CHECK-NEXT: [[V:%.*]] = load i32, i32 addrspace(1)* [[P2]], align 4 381; CHECK-NEXT: ret i32 [[V]] 382; 383 %P2 = select i1 %C, i32 addrspace(1)* null, i32 addrspace(1)* %P 384 %V = load i32, i32 addrspace(1)* %P2 385 ret i32 %V 386} 387 388;; It may be legal to load from a null address with null pointer valid attribute. 389define i32 @test16_no_null_opt(i1 %C, i32* %P) #0 { 390; CHECK-LABEL: @test16_no_null_opt( 391; CHECK-NEXT: [[P2:%.*]] = select i1 [[C:%.*]], i32* [[P:%.*]], i32* null 392; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[P2]], align 4 393; CHECK-NEXT: ret i32 [[V]] 394; 395 %P2 = select i1 %C, i32* %P, i32* null 396 %V = load i32, i32* %P2 397 ret i32 %V 398} 399 400define i32 @test16_no_null_opt_2(i1 %C, i32* %P) #0 { 401; CHECK-LABEL: @test16_no_null_opt_2( 402; CHECK-NEXT: [[P2:%.*]] = select i1 [[C:%.*]], i32* null, i32* [[P:%.*]] 403; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[P2]], align 4 404; CHECK-NEXT: ret i32 [[V]] 405; 406 %P2 = select i1 %C, i32* null, i32* %P 407 %V = load i32, i32* %P2 408 ret i32 %V 409} 410 411attributes #0 = { "null-pointer-is-valid"="true" } 412 413define i1 @test17(i32* %X, i1 %C) { 414; CHECK-LABEL: @test17( 415; CHECK-NEXT: [[RV1:%.*]] = icmp eq i32* [[X:%.*]], null 416; CHECK-NEXT: [[NOT_C:%.*]] = xor i1 [[C:%.*]], true 417; CHECK-NEXT: [[RV:%.*]] = or i1 [[RV1]], [[NOT_C]] 418; CHECK-NEXT: ret i1 [[RV]] 419; 420 %R = select i1 %C, i32* %X, i32* null 421 %RV = icmp eq i32* %R, null 422 ret i1 %RV 423} 424 425define i32 @test18(i32 %X, i32 %Y, i1 %C) { 426; CHECK-LABEL: @test18( 427; CHECK-NEXT: [[V:%.*]] = sdiv i32 [[Y:%.*]], [[X:%.*]] 428; CHECK-NEXT: ret i32 [[V]] 429; 430 %R = select i1 %C, i32 %X, i32 0 431 %V = sdiv i32 %Y, %R 432 ret i32 %V 433} 434 435define i32 @test19(i32 %x) { 436; CHECK-LABEL: @test19( 437; CHECK-NEXT: [[X_LOBIT:%.*]] = ashr i32 [[X:%.*]], 31 438; CHECK-NEXT: ret i32 [[X_LOBIT]] 439; 440 %tmp = icmp ugt i32 %x, 2147483647 441 %retval = select i1 %tmp, i32 -1, i32 0 442 ret i32 %retval 443} 444 445define i32 @test20(i32 %x) { 446; CHECK-LABEL: @test20( 447; CHECK-NEXT: [[X_LOBIT:%.*]] = ashr i32 [[X:%.*]], 31 448; CHECK-NEXT: ret i32 [[X_LOBIT]] 449; 450 %tmp = icmp slt i32 %x, 0 451 %retval = select i1 %tmp, i32 -1, i32 0 452 ret i32 %retval 453} 454 455define i64 @test21(i32 %x) { 456; CHECK-LABEL: @test21( 457; CHECK-NEXT: [[X_LOBIT:%.*]] = ashr i32 [[X:%.*]], 31 458; CHECK-NEXT: [[TMP1:%.*]] = sext i32 [[X_LOBIT]] to i64 459; CHECK-NEXT: ret i64 [[TMP1]] 460; 461 %tmp = icmp slt i32 %x, 0 462 %retval = select i1 %tmp, i64 -1, i64 0 463 ret i64 %retval 464} 465 466define i16 @test22(i32 %x) { 467; CHECK-LABEL: @test22( 468; CHECK-NEXT: [[X_LOBIT:%.*]] = ashr i32 [[X:%.*]], 31 469; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 [[X_LOBIT]] to i16 470; CHECK-NEXT: ret i16 [[TMP1]] 471; 472 %tmp = icmp slt i32 %x, 0 473 %retval = select i1 %tmp, i16 -1, i16 0 474 ret i16 %retval 475} 476 477define i32 @test25(i1 %c) { 478; CHECK-LABEL: @test25( 479; CHECK-NEXT: entry: 480; CHECK-NEXT: br i1 [[C:%.*]], label [[JUMP:%.*]], label [[RET:%.*]] 481; CHECK: jump: 482; CHECK-NEXT: br label [[RET]] 483; CHECK: ret: 484; CHECK-NEXT: [[A:%.*]] = phi i32 [ 10, [[JUMP]] ], [ 20, [[ENTRY:%.*]] ] 485; CHECK-NEXT: ret i32 [[A]] 486; 487entry: 488 br i1 %c, label %jump, label %ret 489jump: 490 br label %ret 491ret: 492 %a = phi i1 [true, %jump], [false, %entry] 493 %b = select i1 %a, i32 10, i32 20 494 ret i32 %b 495} 496 497define i32 @test26(i1 %cond) { 498; CHECK-LABEL: @test26( 499; CHECK-NEXT: entry: 500; CHECK-NEXT: br i1 [[COND:%.*]], label [[JUMP:%.*]], label [[RET:%.*]] 501; CHECK: jump: 502; CHECK-NEXT: br label [[RET]] 503; CHECK: ret: 504; CHECK-NEXT: [[A:%.*]] = phi i32 [ 20, [[ENTRY:%.*]] ], [ 10, [[JUMP]] ] 505; CHECK-NEXT: ret i32 [[A]] 506; 507entry: 508 br i1 %cond, label %jump, label %ret 509jump: 510 %c = or i1 false, false 511 br label %ret 512ret: 513 %a = phi i1 [true, %entry], [%c, %jump] 514 %b = select i1 %a, i32 20, i32 10 515 ret i32 %b 516} 517 518define i32 @test27(i1 %c, i32 %A, i32 %B) { 519; CHECK-LABEL: @test27( 520; CHECK-NEXT: entry: 521; CHECK-NEXT: br i1 [[C:%.*]], label [[JUMP:%.*]], label [[RET:%.*]] 522; CHECK: jump: 523; CHECK-NEXT: br label [[RET]] 524; CHECK: ret: 525; CHECK-NEXT: [[P:%.*]] = phi i32 [ [[A:%.*]], [[JUMP]] ], [ [[B:%.*]], [[ENTRY:%.*]] ] 526; CHECK-NEXT: ret i32 [[P]] 527; 528entry: 529 br i1 %c, label %jump, label %ret 530jump: 531 br label %ret 532ret: 533 %p = phi i1 [true, %jump], [false, %entry] 534 %s = select i1 %p, i32 %A, i32 %B 535 ret i32 %s 536} 537 538define i32 @test28(i1 %cond, i32 %A, i32 %B) { 539; CHECK-LABEL: @test28( 540; CHECK-NEXT: entry: 541; CHECK-NEXT: br i1 [[COND:%.*]], label [[JUMP:%.*]], label [[RET:%.*]] 542; CHECK: jump: 543; CHECK-NEXT: br label [[RET]] 544; CHECK: ret: 545; CHECK-NEXT: [[P:%.*]] = phi i32 [ [[A:%.*]], [[JUMP]] ], [ [[B:%.*]], [[ENTRY:%.*]] ] 546; CHECK-NEXT: ret i32 [[P]] 547; 548entry: 549 br i1 %cond, label %jump, label %ret 550jump: 551 br label %ret 552ret: 553 %c = phi i32 [%A, %jump], [%B, %entry] 554 %p = phi i1 [true, %jump], [false, %entry] 555 %s = select i1 %p, i32 %A, i32 %c 556 ret i32 %s 557} 558 559define i32 @test29(i1 %cond, i32 %A, i32 %B) { 560; CHECK-LABEL: @test29( 561; CHECK-NEXT: entry: 562; CHECK-NEXT: br i1 [[COND:%.*]], label [[JUMP:%.*]], label [[RET:%.*]] 563; CHECK: jump: 564; CHECK-NEXT: br label [[RET]] 565; CHECK: ret: 566; CHECK-NEXT: [[P:%.*]] = phi i32 [ [[A:%.*]], [[JUMP]] ], [ [[B:%.*]], [[ENTRY:%.*]] ] 567; CHECK-NEXT: br label [[NEXT:%.*]] 568; CHECK: next: 569; CHECK-NEXT: ret i32 [[P]] 570; 571entry: 572 br i1 %cond, label %jump, label %ret 573jump: 574 br label %ret 575ret: 576 %c = phi i32 [%A, %jump], [%B, %entry] 577 %p = phi i1 [true, %jump], [false, %entry] 578 br label %next 579 580next: 581 %s = select i1 %p, i32 %A, i32 %c 582 ret i32 %s 583} 584 585; SMAX(SMAX(x, y), x) -> SMAX(x, y) 586define i32 @test30(i32 %x, i32 %y) { 587; CHECK-LABEL: @test30( 588; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[X:%.*]], [[Y:%.*]] 589; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[Y]] 590; CHECK-NEXT: ret i32 [[COND]] 591; 592 %cmp = icmp sgt i32 %x, %y 593 %cond = select i1 %cmp, i32 %x, i32 %y 594 %cmp5 = icmp sgt i32 %cond, %x 595 %retval = select i1 %cmp5, i32 %cond, i32 %x 596 ret i32 %retval 597} 598 599; UMAX(UMAX(x, y), x) -> UMAX(x, y) 600define i32 @test31(i32 %x, i32 %y) { 601; CHECK-LABEL: @test31( 602; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[X:%.*]], [[Y:%.*]] 603; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[Y]] 604; CHECK-NEXT: ret i32 [[COND]] 605; 606 %cmp = icmp ugt i32 %x, %y 607 %cond = select i1 %cmp, i32 %x, i32 %y 608 %cmp5 = icmp ugt i32 %cond, %x 609 %retval = select i1 %cmp5, i32 %cond, i32 %x 610 ret i32 %retval 611} 612 613; SMIN(SMIN(x, y), x) -> SMIN(x, y) 614define i32 @test32(i32 %x, i32 %y) { 615; CHECK-LABEL: @test32( 616; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[X:%.*]], [[Y:%.*]] 617; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], i32 [[Y]], i32 [[X]] 618; CHECK-NEXT: ret i32 [[COND]] 619; 620 %cmp = icmp sgt i32 %x, %y 621 %cond = select i1 %cmp, i32 %y, i32 %x 622 %cmp5 = icmp sgt i32 %cond, %x 623 %retval = select i1 %cmp5, i32 %x, i32 %cond 624 ret i32 %retval 625} 626 627; MAX(MIN(x, y), x) -> x 628define i32 @test33(i32 %x, i32 %y) { 629; CHECK-LABEL: @test33( 630; CHECK-NEXT: ret i32 [[X:%.*]] 631; 632 %cmp = icmp sgt i32 %x, %y 633 %cond = select i1 %cmp, i32 %y, i32 %x 634 %cmp5 = icmp sgt i32 %cond, %x 635 %retval = select i1 %cmp5, i32 %cond, i32 %x 636 ret i32 %retval 637} 638 639; MIN(MAX(x, y), x) -> x 640define i32 @test34(i32 %x, i32 %y) { 641; CHECK-LABEL: @test34( 642; CHECK-NEXT: ret i32 [[X:%.*]] 643; 644 %cmp = icmp sgt i32 %x, %y 645 %cond = select i1 %cmp, i32 %x, i32 %y 646 %cmp5 = icmp sgt i32 %cond, %x 647 %retval = select i1 %cmp5, i32 %x, i32 %cond 648 ret i32 %retval 649} 650 651define i1 @test38(i1 %cond) { 652; CHECK-LABEL: @test38( 653; CHECK-NEXT: ret i1 false 654; 655 %zero = alloca i32 656 %one = alloca i32 657 %ptr = select i1 %cond, i32* %zero, i32* %one 658 %isnull = icmp eq i32* %ptr, null 659 ret i1 %isnull 660} 661 662define i1 @test39(i1 %cond, double %x) { 663; CHECK-LABEL: @test39( 664; CHECK-NEXT: ret i1 true 665; 666 %s = select i1 %cond, double %x, double 0x7FF0000000000000 ; RHS = +infty 667 %cmp = fcmp ule double %x, %s 668 ret i1 %cmp 669} 670 671define i1 @test40(i1 %cond) { 672; CHECK-LABEL: @test40( 673; CHECK-NEXT: ret i1 false 674; 675 %a = alloca i32 676 %b = alloca i32 677 %c = alloca i32 678 %s = select i1 %cond, i32* %a, i32* %b 679 %r = icmp eq i32* %s, %c 680 ret i1 %r 681} 682 683define i32 @test41(i1 %cond, i32 %x, i32 %y) { 684; CHECK-LABEL: @test41( 685; CHECK-NEXT: [[R:%.*]] = and i32 [[X:%.*]], [[Y:%.*]] 686; CHECK-NEXT: ret i32 [[R]] 687; 688 %z = and i32 %x, %y 689 %s = select i1 %cond, i32 %y, i32 %z 690 %r = and i32 %x, %s 691 ret i32 %r 692} 693 694define i32 @test42(i32 %x, i32 %y) { 695; CHECK-LABEL: @test42( 696; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[X:%.*]], 0 697; CHECK-NEXT: [[B:%.*]] = sext i1 [[COND]] to i32 698; CHECK-NEXT: [[C:%.*]] = add i32 [[B]], [[Y:%.*]] 699; CHECK-NEXT: ret i32 [[C]] 700; 701 %b = add i32 %y, -1 702 %cond = icmp eq i32 %x, 0 703 %c = select i1 %cond, i32 %b, i32 %y 704 ret i32 %c 705} 706 707define <2 x i32> @test42vec(<2 x i32> %x, <2 x i32> %y) { 708; CHECK-LABEL: @test42vec( 709; CHECK-NEXT: [[COND:%.*]] = icmp eq <2 x i32> [[X:%.*]], zeroinitializer 710; CHECK-NEXT: [[B:%.*]] = sext <2 x i1> [[COND]] to <2 x i32> 711; CHECK-NEXT: [[C:%.*]] = add <2 x i32> [[B]], [[Y:%.*]] 712; CHECK-NEXT: ret <2 x i32> [[C]] 713; 714 %b = add <2 x i32> %y, <i32 -1, i32 -1> 715 %cond = icmp eq <2 x i32> %x, zeroinitializer 716 %c = select <2 x i1> %cond, <2 x i32> %b, <2 x i32> %y 717 ret <2 x i32> %c 718} 719 720; PR8994 721 722; This select instruction can't be eliminated because trying to do so would 723; change the number of vector elements. This used to assert. 724define i48 @test51(<3 x i1> %icmp, <3 x i16> %tmp) { 725; CHECK-LABEL: @test51( 726; CHECK-NEXT: [[SELECT:%.*]] = select <3 x i1> [[ICMP:%.*]], <3 x i16> zeroinitializer, <3 x i16> [[TMP:%.*]] 727; CHECK-NEXT: [[TMP2:%.*]] = bitcast <3 x i16> [[SELECT]] to i48 728; CHECK-NEXT: ret i48 [[TMP2]] 729; 730 %select = select <3 x i1> %icmp, <3 x i16> zeroinitializer, <3 x i16> %tmp 731 %tmp2 = bitcast <3 x i16> %select to i48 732 ret i48 %tmp2 733} 734 735; Allow select promotion even if there are multiple uses of bitcasted ops. 736; Hoisting the selects allows later pattern matching to see that these are min/max ops. 737 738define void @min_max_bitcast(<4 x float> %a, <4 x float> %b, <4 x i32>* %ptr1, <4 x i32>* %ptr2) { 739; CHECK-LABEL: @min_max_bitcast( 740; CHECK-NEXT: [[CMP:%.*]] = fcmp olt <4 x float> [[A:%.*]], [[B:%.*]] 741; CHECK-NEXT: [[SEL1_V:%.*]] = select <4 x i1> [[CMP]], <4 x float> [[A]], <4 x float> [[B]] 742; CHECK-NEXT: [[SEL2_V:%.*]] = select <4 x i1> [[CMP]], <4 x float> [[B]], <4 x float> [[A]] 743; CHECK-NEXT: [[TMP1:%.*]] = bitcast <4 x i32>* [[PTR1:%.*]] to <4 x float>* 744; CHECK-NEXT: store <4 x float> [[SEL1_V]], <4 x float>* [[TMP1]], align 16 745; CHECK-NEXT: [[TMP2:%.*]] = bitcast <4 x i32>* [[PTR2:%.*]] to <4 x float>* 746; CHECK-NEXT: store <4 x float> [[SEL2_V]], <4 x float>* [[TMP2]], align 16 747; CHECK-NEXT: ret void 748; 749 %cmp = fcmp olt <4 x float> %a, %b 750 %bc1 = bitcast <4 x float> %a to <4 x i32> 751 %bc2 = bitcast <4 x float> %b to <4 x i32> 752 %sel1 = select <4 x i1> %cmp, <4 x i32> %bc1, <4 x i32> %bc2 753 %sel2 = select <4 x i1> %cmp, <4 x i32> %bc2, <4 x i32> %bc1 754 store <4 x i32> %sel1, <4 x i32>* %ptr1 755 store <4 x i32> %sel2, <4 x i32>* %ptr2 756 ret void 757} 758 759; To avoid potential backend problems, we don't do the same transform for other casts. 760 761define void @truncs_before_selects(<4 x float> %f1, <4 x float> %f2, <4 x i64> %a, <4 x i64> %b, <4 x i32>* %ptr1, <4 x i32>* %ptr2) { 762; CHECK-LABEL: @truncs_before_selects( 763; CHECK-NEXT: [[CMP:%.*]] = fcmp olt <4 x float> [[F1:%.*]], [[F2:%.*]] 764; CHECK-NEXT: [[BC1:%.*]] = trunc <4 x i64> [[A:%.*]] to <4 x i32> 765; CHECK-NEXT: [[BC2:%.*]] = trunc <4 x i64> [[B:%.*]] to <4 x i32> 766; CHECK-NEXT: [[SEL1:%.*]] = select <4 x i1> [[CMP]], <4 x i32> [[BC1]], <4 x i32> [[BC2]] 767; CHECK-NEXT: [[SEL2:%.*]] = select <4 x i1> [[CMP]], <4 x i32> [[BC2]], <4 x i32> [[BC1]] 768; CHECK-NEXT: store <4 x i32> [[SEL1]], <4 x i32>* [[PTR1:%.*]], align 16 769; CHECK-NEXT: store <4 x i32> [[SEL2]], <4 x i32>* [[PTR2:%.*]], align 16 770; CHECK-NEXT: ret void 771; 772 %cmp = fcmp olt <4 x float> %f1, %f2 773 %bc1 = trunc <4 x i64> %a to <4 x i32> 774 %bc2 = trunc <4 x i64> %b to <4 x i32> 775 %sel1 = select <4 x i1> %cmp, <4 x i32> %bc1, <4 x i32> %bc2 776 %sel2 = select <4 x i1> %cmp, <4 x i32> %bc2, <4 x i32> %bc1 777 store <4 x i32> %sel1, <4 x i32>* %ptr1, align 16 778 store <4 x i32> %sel2, <4 x i32>* %ptr2, align 16 779 ret void 780} 781 782; PR8575 783 784define i32 @test52(i32 %n, i32 %m) { 785; CHECK-LABEL: @test52( 786; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[N:%.*]], [[M:%.*]] 787; CHECK-NEXT: [[STOREMERGE:%.*]] = select i1 [[CMP]], i32 1, i32 6 788; CHECK-NEXT: ret i32 [[STOREMERGE]] 789; 790 %cmp = icmp sgt i32 %n, %m 791 %. = select i1 %cmp, i32 1, i32 3 792 %add = add nsw i32 %., 3 793 %storemerge = select i1 %cmp, i32 %., i32 %add 794 ret i32 %storemerge 795} 796 797; PR9454 798 799define i32 @test53(i32 %x) { 800; CHECK-LABEL: @test53( 801; CHECK-NEXT: [[AND:%.*]] = and i32 [[X:%.*]], 2 802; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[AND]], [[X]] 803; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 2, i32 1 804; CHECK-NEXT: ret i32 [[SEL]] 805; 806 %and = and i32 %x, 2 807 %cmp = icmp eq i32 %and, %x 808 %sel = select i1 %cmp, i32 2, i32 1 809 ret i32 %sel 810} 811 812define i32 @test54(i32 %X, i32 %Y) { 813; CHECK-LABEL: @test54( 814; CHECK-NEXT: [[B:%.*]] = icmp ne i32 [[X:%.*]], 0 815; CHECK-NEXT: [[C:%.*]] = zext i1 [[B]] to i32 816; CHECK-NEXT: ret i32 [[C]] 817; 818 %A = ashr exact i32 %X, %Y 819 %B = icmp eq i32 %A, 0 820 %C = select i1 %B, i32 %A, i32 1 821 ret i32 %C 822} 823 824define i1 @test55(i1 %X, i32 %Y, i32 %Z) { 825; CHECK-LABEL: @test55( 826; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[Y:%.*]], 0 827; CHECK-NEXT: ret i1 [[C]] 828; 829 %A = ashr exact i32 %Y, %Z 830 %B = select i1 %X, i32 %Y, i32 %A 831 %C = icmp eq i32 %B, 0 832 ret i1 %C 833} 834 835define i32 @test56(i16 %x) { 836; CHECK-LABEL: @test56( 837; CHECK-NEXT: [[CONV:%.*]] = zext i16 [[X:%.*]] to i32 838; CHECK-NEXT: ret i32 [[CONV]] 839; 840 %tobool = icmp eq i16 %x, 0 841 %conv = zext i16 %x to i32 842 %cond = select i1 %tobool, i32 0, i32 %conv 843 ret i32 %cond 844} 845 846define i32 @test57(i32 %x, i32 %y) { 847; CHECK-LABEL: @test57( 848; CHECK-NEXT: [[AND:%.*]] = and i32 [[X:%.*]], [[Y:%.*]] 849; CHECK-NEXT: ret i32 [[AND]] 850; 851 %and = and i32 %x, %y 852 %tobool = icmp eq i32 %x, 0 853 %.and = select i1 %tobool, i32 0, i32 %and 854 ret i32 %.and 855} 856 857define i32 @test58(i16 %x) { 858; CHECK-LABEL: @test58( 859; CHECK-NEXT: [[CONV:%.*]] = zext i16 [[X:%.*]] to i32 860; CHECK-NEXT: ret i32 [[CONV]] 861; 862 %tobool = icmp ne i16 %x, 1 863 %conv = zext i16 %x to i32 864 %cond = select i1 %tobool, i32 %conv, i32 1 865 ret i32 %cond 866} 867 868define i32 @test59(i32 %x, i32 %y) { 869; CHECK-LABEL: @test59( 870; CHECK-NEXT: [[AND:%.*]] = and i32 [[X:%.*]], [[Y:%.*]] 871; CHECK-NEXT: ret i32 [[AND]] 872; 873 %and = and i32 %x, %y 874 %tobool = icmp ne i32 %x, %y 875 %.and = select i1 %tobool, i32 %and, i32 %y 876 ret i32 %.and 877} 878 879define i1 @test60(i32 %x, i1* %y) { 880; CHECK-LABEL: @test60( 881; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X:%.*]], 0 882; CHECK-NEXT: [[LOAD:%.*]] = load i1, i1* [[Y:%.*]], align 1 883; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[X]], 1 884; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i1 [[LOAD]], i1 [[CMP1]] 885; CHECK-NEXT: ret i1 [[SEL]] 886; 887 %cmp = icmp eq i32 %x, 0 888 %load = load i1, i1* %y, align 1 889 %cmp1 = icmp slt i32 %x, 1 890 %sel = select i1 %cmp, i1 %load, i1 %cmp1 891 ret i1 %sel 892} 893 894@glbl = constant i32 10 895define i32 @test61(i32* %ptr) { 896; CHECK-LABEL: @test61( 897; CHECK-NEXT: ret i32 10 898; 899 %A = load i32, i32* %ptr 900 %B = icmp eq i32* %ptr, @glbl 901 %C = select i1 %B, i32 %A, i32 10 902 ret i32 %C 903} 904 905; PR14131 906define void @test64(i32 %p, i16 %b) noreturn { 907; CHECK-LABEL: @test64( 908; CHECK-NEXT: entry: 909; CHECK-NEXT: br i1 undef, label [[LOR_RHS:%.*]], label [[LOR_END:%.*]] 910; CHECK: lor.rhs: 911; CHECK-NEXT: br label [[LOR_END]] 912; CHECK: lor.end: 913; CHECK-NEXT: br i1 true, label [[COND_END17:%.*]], label [[COND_FALSE16:%.*]] 914; CHECK: cond.false16: 915; CHECK-NEXT: br label [[COND_END17]] 916; CHECK: cond.end17: 917; CHECK-NEXT: br label [[WHILE_BODY:%.*]] 918; CHECK: while.body: 919; CHECK-NEXT: br label [[WHILE_BODY]] 920; 921entry: 922 %p.addr.0.insert.mask = and i32 %p, -65536 923 %conv2 = and i32 %p, 65535 924 br i1 undef, label %lor.rhs, label %lor.end 925 926lor.rhs: 927 %p.addr.0.extract.trunc = trunc i32 %p.addr.0.insert.mask to i16 928 %phitmp = zext i16 %p.addr.0.extract.trunc to i32 929 br label %lor.end 930 931lor.end: 932 %t.1 = phi i32 [ 0, %entry ], [ %phitmp, %lor.rhs ] 933 %conv6 = zext i16 %b to i32 934 %div = udiv i32 %conv6, %t.1 935 %tobool8 = icmp eq i32 %div, 0 936 %cmp = icmp eq i32 %t.1, 0 937 %cmp12 = icmp ult i32 %conv2, 2 938 %cmp.sink = select i1 %tobool8, i1 %cmp12, i1 %cmp 939 br i1 %cmp.sink, label %cond.end17, label %cond.false16 940 941cond.false16: 942 br label %cond.end17 943 944cond.end17: 945 br label %while.body 946 947while.body: 948 br label %while.body 949} 950 951@under_aligned = external global i32, align 1 952 953; The load here must not be speculated around the select. One side of the 954; select is trivially dereferenceable but may have a lower alignment than the 955; load does. 956define i32 @test76(i1 %flag, i32* %x) { 957; CHECK-LABEL: @test76( 958; CHECK-NEXT: store i32 0, i32* [[X:%.*]], align 4 959; CHECK-NEXT: [[P:%.*]] = select i1 [[FLAG:%.*]], i32* @under_aligned, i32* [[X]] 960; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[P]], align 4 961; CHECK-NEXT: ret i32 [[V]] 962; 963 store i32 0, i32* %x 964 %p = select i1 %flag, i32* @under_aligned, i32* %x 965 %v = load i32, i32* %p 966 ret i32 %v 967} 968 969declare void @scribble_on_i32(i32*) 970 971; The load here must not be speculated around the select. One side of the 972; select is trivially dereferenceable but may have a lower alignment than the 973; load does. 974 975define i32 @test77(i1 %flag, i32* %x) { 976; CHECK-LABEL: @test77( 977; CHECK-NEXT: [[UNDER_ALIGNED:%.*]] = alloca i32, align 1 978; CHECK-NEXT: call void @scribble_on_i32(i32* nonnull [[UNDER_ALIGNED]]) 979; CHECK-NEXT: store i32 0, i32* [[X:%.*]], align 4 980; CHECK-NEXT: [[P:%.*]] = select i1 [[FLAG:%.*]], i32* [[UNDER_ALIGNED]], i32* [[X]] 981; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[P]], align 4 982; CHECK-NEXT: ret i32 [[V]] 983; 984 %under_aligned = alloca i32, align 1 985 call void @scribble_on_i32(i32* %under_aligned) 986 store i32 0, i32* %x 987 %p = select i1 %flag, i32* %under_aligned, i32* %x 988 %v = load i32, i32* %p 989 ret i32 %v 990} 991 992define i32 @test78(i1 %flag, i32* %x, i32* %y, i32* %z) { 993; Test that we can speculate the loads around the select even when we can't 994; fold the load completely away. 995; CHECK-LABEL: @test78( 996; CHECK-NEXT: entry: 997; CHECK-NEXT: store i32 0, i32* [[X:%.*]], align 4 998; CHECK-NEXT: store i32 0, i32* [[Y:%.*]], align 4 999; CHECK-NEXT: store i32 42, i32* [[Z:%.*]], align 4 1000; CHECK-NEXT: [[X_VAL:%.*]] = load i32, i32* [[X]], align 4 1001; CHECK-NEXT: [[Y_VAL:%.*]] = load i32, i32* [[Y]], align 4 1002; CHECK-NEXT: [[V:%.*]] = select i1 [[FLAG:%.*]], i32 [[X_VAL]], i32 [[Y_VAL]] 1003; CHECK-NEXT: ret i32 [[V]] 1004; 1005entry: 1006 store i32 0, i32* %x 1007 store i32 0, i32* %y 1008 ; Block forwarding by storing to %z which could alias either %x or %y. 1009 store i32 42, i32* %z 1010 %p = select i1 %flag, i32* %x, i32* %y 1011 %v = load i32, i32* %p 1012 ret i32 %v 1013} 1014 1015; Test that we can speculate the loads around the select even when we can't 1016; fold the load completely away. 1017define i32 @test78_deref(i1 %flag, i32* dereferenceable(4) %x, i32* dereferenceable(4) %y, i32* %z) { 1018; CHECK-LABEL: @test78_deref( 1019; CHECK-NEXT: [[X_VAL:%.*]] = load i32, i32* [[X:%.*]], align 4 1020; CHECK-NEXT: [[Y_VAL:%.*]] = load i32, i32* [[Y:%.*]], align 4 1021; CHECK-NEXT: [[V:%.*]] = select i1 [[FLAG:%.*]], i32 [[X_VAL]], i32 [[Y_VAL]] 1022; CHECK-NEXT: ret i32 [[V]] 1023; 1024 %p = select i1 %flag, i32* %x, i32* %y 1025 %v = load i32, i32* %p 1026 ret i32 %v 1027} 1028 1029; The same as @test78 but we can't speculate the load because it can trap 1030; if under-aligned. 1031define i32 @test78_neg(i1 %flag, i32* %x, i32* %y, i32* %z) { 1032; CHECK-LABEL: @test78_neg( 1033; CHECK-NEXT: store i32 0, i32* [[X:%.*]], align 4 1034; CHECK-NEXT: store i32 0, i32* [[Y:%.*]], align 4 1035; CHECK-NEXT: store i32 42, i32* [[Z:%.*]], align 4 1036; CHECK-NEXT: [[P:%.*]] = select i1 [[FLAG:%.*]], i32* [[X]], i32* [[Y]] 1037; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[P]], align 16 1038; CHECK-NEXT: ret i32 [[V]] 1039; 1040 store i32 0, i32* %x 1041 store i32 0, i32* %y 1042 ; Block forwarding by storing to %z which could alias either %x or %y. 1043 store i32 42, i32* %z 1044 %p = select i1 %flag, i32* %x, i32* %y 1045 %v = load i32, i32* %p, align 16 1046 ret i32 %v 1047} 1048 1049; The same as @test78_deref but we can't speculate the load because 1050; one of the arguments is not sufficiently dereferenceable. 1051define i32 @test78_deref_neg(i1 %flag, i32* dereferenceable(2) %x, i32* dereferenceable(4) %y, i32* %z) { 1052; CHECK-LABEL: @test78_deref_neg( 1053; CHECK-NEXT: [[P:%.*]] = select i1 [[FLAG:%.*]], i32* [[X:%.*]], i32* [[Y:%.*]] 1054; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[P]], align 4 1055; CHECK-NEXT: ret i32 [[V]] 1056; 1057 %p = select i1 %flag, i32* %x, i32* %y 1058 %v = load i32, i32* %p 1059 ret i32 %v 1060} 1061 1062; Test that we can speculate the loads around the select even when we can't 1063; fold the load completely away. 1064define float @test79(i1 %flag, float* %x, i32* %y, i32* %z) { 1065; CHECK-LABEL: @test79( 1066; CHECK-NEXT: [[X1:%.*]] = bitcast float* [[X:%.*]] to i32* 1067; CHECK-NEXT: [[Y1:%.*]] = bitcast i32* [[Y:%.*]] to float* 1068; CHECK-NEXT: store i32 0, i32* [[X1]], align 4 1069; CHECK-NEXT: store i32 0, i32* [[Y]], align 4 1070; CHECK-NEXT: store i32 42, i32* [[Z:%.*]], align 4 1071; CHECK-NEXT: [[X_VAL:%.*]] = load float, float* [[X]], align 4 1072; CHECK-NEXT: [[Y1_VAL:%.*]] = load float, float* [[Y1]], align 4 1073; CHECK-NEXT: [[V:%.*]] = select i1 [[FLAG:%.*]], float [[X_VAL]], float [[Y1_VAL]] 1074; CHECK-NEXT: ret float [[V]] 1075; 1076 %x1 = bitcast float* %x to i32* 1077 %y1 = bitcast i32* %y to float* 1078 store i32 0, i32* %x1 1079 store i32 0, i32* %y 1080 ; Block forwarding by storing to %z which could alias either %x or %y. 1081 store i32 42, i32* %z 1082 %p = select i1 %flag, float* %x, float* %y1 1083 %v = load float, float* %p 1084 ret float %v 1085} 1086 1087; Test that when we speculate the loads around the select they fold throug 1088; load->load folding and load->store folding. 1089define i32 @test80(i1 %flag) { 1090; CHECK-LABEL: @test80( 1091; CHECK-NEXT: [[X:%.*]] = alloca i32, align 4 1092; CHECK-NEXT: [[Y:%.*]] = alloca i32, align 4 1093; CHECK-NEXT: call void @scribble_on_i32(i32* nonnull [[X]]) 1094; CHECK-NEXT: call void @scribble_on_i32(i32* nonnull [[Y]]) 1095; CHECK-NEXT: [[TMP:%.*]] = load i32, i32* [[X]], align 4 1096; CHECK-NEXT: store i32 [[TMP]], i32* [[Y]], align 4 1097; CHECK-NEXT: ret i32 [[TMP]] 1098; 1099 %x = alloca i32 1100 %y = alloca i32 1101 call void @scribble_on_i32(i32* %x) 1102 call void @scribble_on_i32(i32* %y) 1103 %tmp = load i32, i32* %x 1104 store i32 %tmp, i32* %y 1105 %p = select i1 %flag, i32* %x, i32* %y 1106 %v = load i32, i32* %p 1107 ret i32 %v 1108} 1109 1110; Test that we can speculate the load around the select even though they use 1111; differently typed pointers. 1112define float @test81(i1 %flag) { 1113; CHECK-LABEL: @test81( 1114; CHECK-NEXT: [[X:%.*]] = alloca i32, align 4 1115; CHECK-NEXT: [[Y:%.*]] = alloca i32, align 4 1116; CHECK-NEXT: call void @scribble_on_i32(i32* nonnull [[X]]) 1117; CHECK-NEXT: call void @scribble_on_i32(i32* nonnull [[Y]]) 1118; CHECK-NEXT: [[TMP:%.*]] = load i32, i32* [[X]], align 4 1119; CHECK-NEXT: store i32 [[TMP]], i32* [[Y]], align 4 1120; CHECK-NEXT: [[V:%.*]] = bitcast i32 [[TMP]] to float 1121; CHECK-NEXT: ret float [[V]] 1122; 1123 %x = alloca float 1124 %y = alloca i32 1125 %x1 = bitcast float* %x to i32* 1126 %y1 = bitcast i32* %y to float* 1127 call void @scribble_on_i32(i32* %x1) 1128 call void @scribble_on_i32(i32* %y) 1129 %tmp = load i32, i32* %x1 1130 store i32 %tmp, i32* %y 1131 %p = select i1 %flag, float* %x, float* %y1 1132 %v = load float, float* %p 1133 ret float %v 1134} 1135 1136; Test that we can speculate the load around the select even though they use 1137; differently typed pointers. 1138define i32 @test82(i1 %flag) { 1139; CHECK-LABEL: @test82( 1140; CHECK-NEXT: [[X:%.*]] = alloca float, align 4 1141; CHECK-NEXT: [[Y:%.*]] = alloca i32, align 4 1142; CHECK-NEXT: [[X1:%.*]] = bitcast float* [[X]] to i32* 1143; CHECK-NEXT: [[Y1:%.*]] = bitcast i32* [[Y]] to float* 1144; CHECK-NEXT: call void @scribble_on_i32(i32* [[X1]]) 1145; CHECK-NEXT: call void @scribble_on_i32(i32* nonnull [[Y]]) 1146; CHECK-NEXT: [[TMP:%.*]] = load float, float* [[X]], align 4 1147; CHECK-NEXT: store float [[TMP]], float* [[Y1]], align 4 1148; CHECK-NEXT: [[V:%.*]] = bitcast float [[TMP]] to i32 1149; CHECK-NEXT: ret i32 [[V]] 1150; 1151 %x = alloca float 1152 %y = alloca i32 1153 %x1 = bitcast float* %x to i32* 1154 %y1 = bitcast i32* %y to float* 1155 call void @scribble_on_i32(i32* %x1) 1156 call void @scribble_on_i32(i32* %y) 1157 %tmp = load float, float* %x 1158 store float %tmp, float* %y1 1159 %p = select i1 %flag, i32* %x1, i32* %y 1160 %v = load i32, i32* %p 1161 ret i32 %v 1162} 1163 1164declare void @scribble_on_i64(i64*) 1165declare void @scribble_on_i128(i128*) 1166 1167; Test that we can speculate the load around the select even though they use 1168; differently typed pointers and requires inttoptr casts. 1169define i8* @test83(i1 %flag) { 1170; CHECK-LABEL: @test83( 1171; CHECK-NEXT: [[X:%.*]] = alloca i8*, align 8 1172; CHECK-NEXT: [[Y:%.*]] = alloca i8*, align 8 1173; CHECK-NEXT: [[TMPCAST:%.*]] = bitcast i8** [[Y]] to i64* 1174; CHECK-NEXT: [[X1:%.*]] = bitcast i8** [[X]] to i64* 1175; CHECK-NEXT: call void @scribble_on_i64(i64* [[X1]]) 1176; CHECK-NEXT: call void @scribble_on_i64(i64* [[TMPCAST]]) 1177; CHECK-NEXT: [[TMP:%.*]] = load i64, i64* [[X1]], align 8 1178; CHECK-NEXT: store i64 [[TMP]], i64* [[TMPCAST]], align 8 1179; CHECK-NEXT: [[V:%.*]] = inttoptr i64 [[TMP]] to i8* 1180; CHECK-NEXT: ret i8* [[V]] 1181; 1182 %x = alloca i8* 1183 %y = alloca i64 1184 %x1 = bitcast i8** %x to i64* 1185 %y1 = bitcast i64* %y to i8** 1186 call void @scribble_on_i64(i64* %x1) 1187 call void @scribble_on_i64(i64* %y) 1188 %tmp = load i64, i64* %x1 1189 store i64 %tmp, i64* %y 1190 %p = select i1 %flag, i8** %x, i8** %y1 1191 %v = load i8*, i8** %p 1192 ret i8* %v 1193} 1194 1195; Test that we can speculate the load around the select even though they use 1196; differently typed pointers and requires a ptrtoint cast. 1197define i64 @test84(i1 %flag) { 1198; CHECK-LABEL: @test84( 1199; CHECK-NEXT: [[X:%.*]] = alloca i8*, align 8 1200; CHECK-NEXT: [[Y:%.*]] = alloca i8*, align 8 1201; CHECK-NEXT: [[TMPCAST:%.*]] = bitcast i8** [[Y]] to i64* 1202; CHECK-NEXT: [[X1:%.*]] = bitcast i8** [[X]] to i64* 1203; CHECK-NEXT: call void @scribble_on_i64(i64* [[X1]]) 1204; CHECK-NEXT: call void @scribble_on_i64(i64* [[TMPCAST]]) 1205; CHECK-NEXT: [[TMP:%.*]] = load i8*, i8** [[X]], align 8 1206; CHECK-NEXT: store i8* [[TMP]], i8** [[Y]], align 8 1207; CHECK-NEXT: [[V:%.*]] = ptrtoint i8* [[TMP]] to i64 1208; CHECK-NEXT: ret i64 [[V]] 1209; 1210 %x = alloca i8* 1211 %y = alloca i64 1212 %x1 = bitcast i8** %x to i64* 1213 %y1 = bitcast i64* %y to i8** 1214 call void @scribble_on_i64(i64* %x1) 1215 call void @scribble_on_i64(i64* %y) 1216 %tmp = load i8*, i8** %x 1217 store i8* %tmp, i8** %y1 1218 %p = select i1 %flag, i64* %x1, i64* %y 1219 %v = load i64, i64* %p 1220 ret i64 %v 1221} 1222 1223; Test that we can't speculate the load around the select. The load of the 1224; pointer doesn't load all of the stored integer bits. We could fix this, but it 1225; would require endianness checks and other nastiness. 1226define i8* @test85(i1 %flag) { 1227; CHECK-LABEL: @test85( 1228; CHECK-NEXT: [[X1:%.*]] = alloca [2 x i8*], align 8 1229; CHECK-NEXT: [[Y:%.*]] = alloca i128, align 8 1230; CHECK-NEXT: [[X1_SUB:%.*]] = getelementptr inbounds [2 x i8*], [2 x i8*]* [[X1]], i64 0, i64 0 1231; CHECK-NEXT: [[X2:%.*]] = bitcast [2 x i8*]* [[X1]] to i128* 1232; CHECK-NEXT: [[Y1:%.*]] = bitcast i128* [[Y]] to i8** 1233; CHECK-NEXT: call void @scribble_on_i128(i128* [[X2]]) 1234; CHECK-NEXT: call void @scribble_on_i128(i128* nonnull [[Y]]) 1235; CHECK-NEXT: [[TMP:%.*]] = load i128, i128* [[X2]], align 8 1236; CHECK-NEXT: store i128 [[TMP]], i128* [[Y]], align 8 1237; CHECK-NEXT: [[X1_SUB_VAL:%.*]] = load i8*, i8** [[X1_SUB]], align 8 1238; CHECK-NEXT: [[Y1_VAL:%.*]] = load i8*, i8** [[Y1]], align 8 1239; CHECK-NEXT: [[V:%.*]] = select i1 [[FLAG:%.*]], i8* [[X1_SUB_VAL]], i8* [[Y1_VAL]] 1240; CHECK-NEXT: ret i8* [[V]] 1241; 1242 %x = alloca [2 x i8*] 1243 %y = alloca i128 1244 %x1 = bitcast [2 x i8*]* %x to i8** 1245 %x2 = bitcast i8** %x1 to i128* 1246 %y1 = bitcast i128* %y to i8** 1247 call void @scribble_on_i128(i128* %x2) 1248 call void @scribble_on_i128(i128* %y) 1249 %tmp = load i128, i128* %x2 1250 store i128 %tmp, i128* %y 1251 %p = select i1 %flag, i8** %x1, i8** %y1 1252 %v = load i8*, i8** %p 1253 ret i8* %v 1254} 1255 1256; Test that we can't speculate the load around the select when the integer size 1257; is larger than the pointer size. The store of the pointer doesn't store to all 1258; the bits of the integer. 1259define i128 @test86(i1 %flag) { 1260; CHECK-LABEL: @test86( 1261; CHECK-NEXT: [[X1:%.*]] = alloca [2 x i8*], align 8 1262; CHECK-NEXT: [[Y:%.*]] = alloca i128, align 8 1263; CHECK-NEXT: [[X1_SUB:%.*]] = getelementptr inbounds [2 x i8*], [2 x i8*]* [[X1]], i64 0, i64 0 1264; CHECK-NEXT: [[X2:%.*]] = bitcast [2 x i8*]* [[X1]] to i128* 1265; CHECK-NEXT: [[Y1:%.*]] = bitcast i128* [[Y]] to i8** 1266; CHECK-NEXT: call void @scribble_on_i128(i128* [[X2]]) 1267; CHECK-NEXT: call void @scribble_on_i128(i128* nonnull [[Y]]) 1268; CHECK-NEXT: [[TMP:%.*]] = load i8*, i8** [[X1_SUB]], align 8 1269; CHECK-NEXT: store i8* [[TMP]], i8** [[Y1]], align 8 1270; CHECK-NEXT: [[X2_VAL:%.*]] = load i128, i128* [[X2]], align 8 1271; CHECK-NEXT: [[Y_VAL:%.*]] = load i128, i128* [[Y]], align 8 1272; CHECK-NEXT: [[V:%.*]] = select i1 [[FLAG:%.*]], i128 [[X2_VAL]], i128 [[Y_VAL]] 1273; CHECK-NEXT: ret i128 [[V]] 1274; 1275 %x = alloca [2 x i8*] 1276 %y = alloca i128 1277 %x1 = bitcast [2 x i8*]* %x to i8** 1278 %x2 = bitcast i8** %x1 to i128* 1279 %y1 = bitcast i128* %y to i8** 1280 call void @scribble_on_i128(i128* %x2) 1281 call void @scribble_on_i128(i128* %y) 1282 %tmp = load i8*, i8** %x1 1283 store i8* %tmp, i8** %y1 1284 %p = select i1 %flag, i128* %x2, i128* %y 1285 %v = load i128, i128* %p 1286 ret i128 %v 1287} 1288 1289define i32 @test_select_select0(i32 %a, i32 %r0, i32 %r1, i32 %v1, i32 %v2) { 1290; CHECK-LABEL: @test_select_select0( 1291; CHECK-NEXT: [[C0:%.*]] = icmp slt i32 [[A:%.*]], [[V1:%.*]] 1292; CHECK-NEXT: [[S0:%.*]] = select i1 [[C0]], i32 [[R1:%.*]], i32 [[R0:%.*]] 1293; CHECK-NEXT: [[C1:%.*]] = icmp slt i32 [[A]], [[V2:%.*]] 1294; CHECK-NEXT: [[S1:%.*]] = select i1 [[C1]], i32 [[S0]], i32 [[R1]] 1295; CHECK-NEXT: ret i32 [[S1]] 1296; 1297 %c0 = icmp sge i32 %a, %v1 1298 %s0 = select i1 %c0, i32 %r0, i32 %r1 1299 %c1 = icmp slt i32 %a, %v2 1300 %s1 = select i1 %c1, i32 %s0, i32 %r1 1301 ret i32 %s1 1302} 1303 1304define i32 @test_select_select1(i32 %a, i32 %r0, i32 %r1, i32 %v1, i32 %v2) { 1305; CHECK-LABEL: @test_select_select1( 1306; CHECK-NEXT: [[C0:%.*]] = icmp slt i32 [[A:%.*]], [[V1:%.*]] 1307; CHECK-NEXT: [[S0:%.*]] = select i1 [[C0]], i32 [[R1:%.*]], i32 [[R0:%.*]] 1308; CHECK-NEXT: [[C1:%.*]] = icmp slt i32 [[A]], [[V2:%.*]] 1309; CHECK-NEXT: [[S1:%.*]] = select i1 [[C1]], i32 [[R0]], i32 [[S0]] 1310; CHECK-NEXT: ret i32 [[S1]] 1311; 1312 %c0 = icmp sge i32 %a, %v1 1313 %s0 = select i1 %c0, i32 %r0, i32 %r1 1314 %c1 = icmp slt i32 %a, %v2 1315 %s1 = select i1 %c1, i32 %r0, i32 %s0 1316 ret i32 %s1 1317} 1318 1319define i32 @PR23757(i32 %x) { 1320; CHECK-LABEL: @PR23757( 1321; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X:%.*]], 2147483647 1322; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[X]], 1 1323; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 -2147483648, i32 [[ADD]] 1324; CHECK-NEXT: ret i32 [[SEL]] 1325; 1326 %cmp = icmp eq i32 %x, 2147483647 1327 %add = add nsw i32 %x, 1 1328 %sel = select i1 %cmp, i32 -2147483648, i32 %add 1329 ret i32 %sel 1330} 1331 1332; max(max(~a, -1), -1) --> max(~a, -1) 1333 1334define i32 @PR27137(i32 %a) { 1335; CHECK-LABEL: @PR27137( 1336; CHECK-NEXT: [[NOT_A:%.*]] = xor i32 [[A:%.*]], -1 1337; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[NOT_A]], -1 1338; CHECK-NEXT: [[S1:%.*]] = select i1 [[TMP1]], i32 [[NOT_A]], i32 -1 1339; CHECK-NEXT: ret i32 [[S1]] 1340; 1341 %not_a = xor i32 %a, -1 1342 %c0 = icmp slt i32 %a, 0 1343 %s0 = select i1 %c0, i32 %not_a, i32 -1 1344 %c1 = icmp sgt i32 %s0, -1 1345 %s1 = select i1 %c1, i32 %s0, i32 -1 1346 ret i32 %s1 1347} 1348 1349define i32 @select_icmp_slt0_xor(i32 %x) { 1350; CHECK-LABEL: @select_icmp_slt0_xor( 1351; CHECK-NEXT: [[TMP1:%.*]] = or i32 [[X:%.*]], -2147483648 1352; CHECK-NEXT: ret i32 [[TMP1]] 1353; 1354 %cmp = icmp slt i32 %x, zeroinitializer 1355 %xor = xor i32 %x, 2147483648 1356 %x.xor = select i1 %cmp, i32 %x, i32 %xor 1357 ret i32 %x.xor 1358} 1359 1360define <2 x i32> @select_icmp_slt0_xor_vec(<2 x i32> %x) { 1361; CHECK-LABEL: @select_icmp_slt0_xor_vec( 1362; CHECK-NEXT: [[TMP1:%.*]] = or <2 x i32> [[X:%.*]], <i32 -2147483648, i32 -2147483648> 1363; CHECK-NEXT: ret <2 x i32> [[TMP1]] 1364; 1365 %cmp = icmp slt <2 x i32> %x, zeroinitializer 1366 %xor = xor <2 x i32> %x, <i32 2147483648, i32 2147483648> 1367 %x.xor = select <2 x i1> %cmp, <2 x i32> %x, <2 x i32> %xor 1368 ret <2 x i32> %x.xor 1369} 1370 1371define <4 x i32> @canonicalize_to_shuffle(<4 x i32> %a, <4 x i32> %b) { 1372; CHECK-LABEL: @canonicalize_to_shuffle( 1373; CHECK-NEXT: [[SEL:%.*]] = shufflevector <4 x i32> [[A:%.*]], <4 x i32> [[B:%.*]], <4 x i32> <i32 0, i32 5, i32 6, i32 3> 1374; CHECK-NEXT: ret <4 x i32> [[SEL]] 1375; 1376 %sel = select <4 x i1> <i1 true, i1 false, i1 false, i1 true>, <4 x i32> %a, <4 x i32> %b 1377 ret <4 x i32> %sel 1378} 1379 1380; Undef elements of the select condition may not be translated into undef elements of a shuffle mask 1381; because undef in a shuffle mask means we can return anything, not just one of the selected values. 1382; https://bugs.llvm.org/show_bug.cgi?id=32486 1383 1384define <4 x i32> @undef_elts_in_condition(<4 x i32> %a, <4 x i32> %b) { 1385; CHECK-LABEL: @undef_elts_in_condition( 1386; CHECK-NEXT: [[SEL:%.*]] = select <4 x i1> <i1 true, i1 undef, i1 false, i1 undef>, <4 x i32> [[A:%.*]], <4 x i32> [[B:%.*]] 1387; CHECK-NEXT: ret <4 x i32> [[SEL]] 1388; 1389 %sel = select <4 x i1> <i1 true, i1 undef, i1 false, i1 undef>, <4 x i32> %a, <4 x i32> %b 1390 ret <4 x i32> %sel 1391} 1392 1393; Don't die or try if the condition mask is a constant expression or contains a constant expression. 1394 1395@g = global i32 0 1396 1397define <4 x i32> @cannot_canonicalize_to_shuffle1(<4 x i32> %a, <4 x i32> %b) { 1398; CHECK-LABEL: @cannot_canonicalize_to_shuffle1( 1399; CHECK-NEXT: [[SEL:%.*]] = select <4 x i1> bitcast (i4 ptrtoint (i32* @g to i4) to <4 x i1>), <4 x i32> [[A:%.*]], <4 x i32> [[B:%.*]] 1400; CHECK-NEXT: ret <4 x i32> [[SEL]] 1401; 1402 %sel = select <4 x i1> bitcast (i4 ptrtoint (i32* @g to i4) to <4 x i1>), <4 x i32> %a, <4 x i32> %b 1403 ret <4 x i32> %sel 1404} 1405 1406define <4 x i32> @cannot_canonicalize_to_shuffle2(<4 x i32> %a, <4 x i32> %b) { 1407; CHECK-LABEL: @cannot_canonicalize_to_shuffle2( 1408; CHECK-NEXT: [[SEL:%.*]] = select <4 x i1> <i1 true, i1 undef, i1 false, i1 icmp sle (i16 ptrtoint (i32* @g to i16), i16 4)>, <4 x i32> [[A:%.*]], <4 x i32> [[B:%.*]] 1409; CHECK-NEXT: ret <4 x i32> [[SEL]] 1410; 1411 %sel = select <4 x i1> <i1 true, i1 undef, i1 false, i1 icmp sle (i16 ptrtoint (i32* @g to i16), i16 4)>, <4 x i32> %a, <4 x i32> %b 1412 ret <4 x i32> %sel 1413} 1414 1415declare void @llvm.assume(i1) 1416 1417define i8 @assume_cond_true(i1 %cond, i8 %x, i8 %y) { 1418; CHECK-LABEL: @assume_cond_true( 1419; CHECK-NEXT: call void @llvm.assume(i1 [[COND:%.*]]) 1420; CHECK-NEXT: ret i8 [[X:%.*]] 1421; 1422 call void @llvm.assume(i1 %cond) 1423 %sel = select i1 %cond, i8 %x, i8 %y 1424 ret i8 %sel 1425} 1426 1427; computeKnownBitsFromAssume() understands the 'not' of an assumed condition. 1428 1429define i8 @assume_cond_false(i1 %cond, i8 %x, i8 %y) { 1430; CHECK-LABEL: @assume_cond_false( 1431; CHECK-NEXT: [[NOTCOND:%.*]] = xor i1 [[COND:%.*]], true 1432; CHECK-NEXT: call void @llvm.assume(i1 [[NOTCOND]]) 1433; CHECK-NEXT: ret i8 [[Y:%.*]] 1434; 1435 %notcond = xor i1 %cond, true 1436 call void @llvm.assume(i1 %notcond) 1437 %sel = select i1 %cond, i8 %x, i8 %y 1438 ret i8 %sel 1439} 1440 1441; Test case to make sure we don't consider an all ones float values for converting the select into a sext. 1442define <4 x float> @PR33721(<4 x float> %w) { 1443; CHECK-LABEL: @PR33721( 1444; CHECK-NEXT: entry: 1445; CHECK-NEXT: [[TMP0:%.*]] = fcmp ole <4 x float> [[W:%.*]], zeroinitializer 1446; CHECK-NEXT: [[TMP1:%.*]] = select <4 x i1> [[TMP0]], <4 x float> <float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000>, <4 x float> zeroinitializer 1447; CHECK-NEXT: ret <4 x float> [[TMP1]] 1448; 1449entry: 1450 %0 = fcmp ole <4 x float> %w, zeroinitializer 1451 %1 = select <4 x i1> %0, <4 x float> <float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000>, <4 x float> zeroinitializer 1452 ret <4 x float> %1 1453} 1454 1455; select(C, binop(select(C, X, Y), W), Z) -> select(C, binop(X, W), Z) 1456define i8 @test87(i1 %cond, i8 %w, i8 %x, i8 %y, i8 %z) { 1457; CHECK-LABEL: @test87( 1458; CHECK-NEXT: [[B:%.*]] = add i8 [[X:%.*]], [[W:%.*]] 1459; CHECK-NEXT: [[C:%.*]] = select i1 [[COND:%.*]], i8 [[B]], i8 [[Z:%.*]] 1460; CHECK-NEXT: ret i8 [[C]] 1461; 1462 %a = select i1 %cond, i8 %x, i8 %y 1463 %b = add i8 %a, %w 1464 %c = select i1 %cond, i8 %b, i8 %z 1465 ret i8 %c 1466} 1467 1468; select(C, binop(select(C, X, Y), W), Z) -> select(C, Z, binop(Y, W)) 1469define i8 @test88(i1 %cond, i8 %w, i8 %x, i8 %y, i8 %z) { 1470; CHECK-LABEL: @test88( 1471; CHECK-NEXT: [[B:%.*]] = sub i8 [[Y:%.*]], [[W:%.*]] 1472; CHECK-NEXT: [[C:%.*]] = select i1 [[COND:%.*]], i8 [[Z:%.*]], i8 [[B]] 1473; CHECK-NEXT: ret i8 [[C]] 1474; 1475 %a = select i1 %cond, i8 %x, i8 %y 1476 %b = sub i8 %a, %w 1477 %c = select i1 %cond, i8 %z, i8 %b 1478 ret i8 %c 1479} 1480 1481; select(C, Z, binop(W, select(C, X, Y))) -> select(C, binop(X, W), Z) 1482define i8 @test89(i1 %cond, i8 %w, i8 %x, i8 %y, i8 %z) { 1483; CHECK-LABEL: @test89( 1484; CHECK-NEXT: [[B:%.*]] = and i8 [[X:%.*]], [[W:%.*]] 1485; CHECK-NEXT: [[C:%.*]] = select i1 [[COND:%.*]], i8 [[B]], i8 [[Z:%.*]] 1486; CHECK-NEXT: ret i8 [[C]] 1487; 1488 %a = select i1 %cond, i8 %x, i8 %y 1489 %b = and i8 %w, %a 1490 %c = select i1 %cond, i8 %b, i8 %z 1491 ret i8 %c 1492} 1493 1494; select(C, Z, binop(W, select(C, X, Y))) -> select(C, Z, binop(W, Y)) 1495define i8 @test90(i1 %cond, i8 %w, i8 %x, i8 %y, i8 %z) { 1496; CHECK-LABEL: @test90( 1497; CHECK-NEXT: [[B:%.*]] = or i8 [[Y:%.*]], [[W:%.*]] 1498; CHECK-NEXT: [[C:%.*]] = select i1 [[COND:%.*]], i8 [[Z:%.*]], i8 [[B]] 1499; CHECK-NEXT: ret i8 [[C]] 1500; 1501 %a = select i1 %cond, i8 %x, i8 %y 1502 %b = or i8 %w, %a 1503 %c = select i1 %cond, i8 %z, i8 %b 1504 ret i8 %c 1505} 1506 1507