1 ; RUN: opt < %s -instcombine -S | FileCheck %s 2 3 target datalayout = "e-p:64:64-p1:16:16-p2:32:32:32-p3:64:64:64" 4 5 %intstruct = type { i32 } 6 %pair = type { i32, i32 } 7 %struct.B = type { double } 8 %struct.A = type { %struct.B, i32, i32 } 9 10 11 @Global = constant [10 x i8] c"helloworld" 12 @Global_as1 = addrspace(1) constant [10 x i8] c"helloworld" 13 14 ; Test noop elimination 15 define i32* @test1(i32* %I) { 16 %A = getelementptr i32* %I, i64 0 17 ret i32* %A 18 ; CHECK-LABEL: @test1( 19 ; CHECK: ret i32* %I 20 } 21 22 define i32 addrspace(1)* @test1_as1(i32 addrspace(1)* %I) { 23 %A = getelementptr i32 addrspace(1)* %I, i64 0 24 ret i32 addrspace(1)* %A 25 ; CHECK-LABEL: @test1_as1( 26 ; CHECK: ret i32 addrspace(1)* %I 27 } 28 29 ; Test noop elimination 30 define i32* @test2(i32* %I) { 31 %A = getelementptr i32* %I 32 ret i32* %A 33 ; CHECK-LABEL: @test2( 34 ; CHECK: ret i32* %I 35 } 36 37 ; Test that two array indexing geps fold 38 define i32* @test3(i32* %I) { 39 %A = getelementptr i32* %I, i64 17 40 %B = getelementptr i32* %A, i64 4 41 ret i32* %B 42 ; CHECK-LABEL: @test3( 43 ; CHECK: getelementptr i32* %I, i64 21 44 } 45 46 ; Test that two getelementptr insts fold 47 define i32* @test4({ i32 }* %I) { 48 %A = getelementptr { i32 }* %I, i64 1 49 %B = getelementptr { i32 }* %A, i64 0, i32 0 50 ret i32* %B 51 ; CHECK-LABEL: @test4( 52 ; CHECK: getelementptr { i32 }* %I, i64 1, i32 0 53 } 54 55 define void @test5(i8 %B) { 56 ; This should be turned into a constexpr instead of being an instruction 57 %A = getelementptr [10 x i8]* @Global, i64 0, i64 4 58 store i8 %B, i8* %A 59 ret void 60 ; CHECK-LABEL: @test5( 61 ; CHECK: store i8 %B, i8* getelementptr inbounds ([10 x i8]* @Global, i64 0, i64 4) 62 } 63 64 define void @test5_as1(i8 %B) { 65 ; This should be turned into a constexpr instead of being an instruction 66 %A = getelementptr [10 x i8] addrspace(1)* @Global_as1, i16 0, i16 4 67 store i8 %B, i8 addrspace(1)* %A 68 ret void 69 ; CHECK-LABEL: @test5_as1( 70 ; CHECK: store i8 %B, i8 addrspace(1)* getelementptr inbounds ([10 x i8] addrspace(1)* @Global_as1, i16 0, i16 4) 71 } 72 73 %as1_ptr_struct = type { i32 addrspace(1)* } 74 %as2_ptr_struct = type { i32 addrspace(2)* } 75 76 @global_as2 = addrspace(2) global i32 zeroinitializer 77 @global_as1_as2_ptr = addrspace(1) global %as2_ptr_struct { i32 addrspace(2)* @global_as2 } 78 79 ; This should be turned into a constexpr instead of being an instruction 80 define void @test_evaluate_gep_nested_as_ptrs(i32 addrspace(2)* %B) { 81 ; CHECK-LABEL: @test_evaluate_gep_nested_as_ptrs( 82 ; CHECK-NEXT: store i32 addrspace(2)* %B, i32 addrspace(2)* addrspace(1)* getelementptr inbounds (%as2_ptr_struct addrspace(1)* @global_as1_as2_ptr, i16 0, i32 0), align 8 83 ; CHECK-NEXT: ret void 84 %A = getelementptr %as2_ptr_struct addrspace(1)* @global_as1_as2_ptr, i16 0, i32 0 85 store i32 addrspace(2)* %B, i32 addrspace(2)* addrspace(1)* %A 86 ret void 87 } 88 89 @arst = addrspace(1) global [4 x i8 addrspace(2)*] zeroinitializer 90 91 define void @test_evaluate_gep_as_ptrs_array(i8 addrspace(2)* %B) { 92 ; CHECK-LABEL: @test_evaluate_gep_as_ptrs_array( 93 ; CHECK-NEXT: store i8 addrspace(2)* %B, i8 addrspace(2)* addrspace(1)* getelementptr inbounds ([4 x i8 addrspace(2)*] addrspace(1)* @arst, i16 0, i16 2), align 4 94 95 ; CHECK-NEXT: ret void 96 %A = getelementptr [4 x i8 addrspace(2)*] addrspace(1)* @arst, i16 0, i16 2 97 store i8 addrspace(2)* %B, i8 addrspace(2)* addrspace(1)* %A 98 ret void 99 } 100 101 define i32* @test7(i32* %I, i64 %C, i64 %D) { 102 %A = getelementptr i32* %I, i64 %C 103 %B = getelementptr i32* %A, i64 %D 104 ret i32* %B 105 ; CHECK-LABEL: @test7( 106 ; CHECK: %A.sum = add i64 %C, %D 107 ; CHECK: getelementptr i32* %I, i64 %A.sum 108 } 109 110 define i8* @test8([10 x i32]* %X) { 111 ;; Fold into the cast. 112 %A = getelementptr [10 x i32]* %X, i64 0, i64 0 113 %B = bitcast i32* %A to i8* 114 ret i8* %B 115 ; CHECK-LABEL: @test8( 116 ; CHECK: bitcast [10 x i32]* %X to i8* 117 } 118 119 define i32 @test9() { 120 %A = getelementptr { i32, double }* null, i32 0, i32 1 121 %B = ptrtoint double* %A to i32 122 ret i32 %B 123 ; CHECK-LABEL: @test9( 124 ; CHECK: ret i32 8 125 } 126 127 define i1 @test10({ i32, i32 }* %x, { i32, i32 }* %y) { 128 %tmp.1 = getelementptr { i32, i32 }* %x, i32 0, i32 1 129 %tmp.3 = getelementptr { i32, i32 }* %y, i32 0, i32 1 130 ;; seteq x, y 131 %tmp.4 = icmp eq i32* %tmp.1, %tmp.3 132 ret i1 %tmp.4 133 ; CHECK-LABEL: @test10( 134 ; CHECK: icmp eq { i32, i32 }* %x, %y 135 } 136 137 define i1 @test11({ i32, i32 }* %X) { 138 %P = getelementptr { i32, i32 }* %X, i32 0, i32 0 139 %Q = icmp eq i32* %P, null 140 ret i1 %Q 141 ; CHECK-LABEL: @test11( 142 ; CHECK: icmp eq { i32, i32 }* %X, null 143 } 144 145 146 ; PR4748 147 define i32 @test12(%struct.A* %a) { 148 entry: 149 %g3 = getelementptr %struct.A* %a, i32 0, i32 1 150 store i32 10, i32* %g3, align 4 151 152 %g4 = getelementptr %struct.A* %a, i32 0, i32 0 153 154 %new_a = bitcast %struct.B* %g4 to %struct.A* 155 156 %g5 = getelementptr %struct.A* %new_a, i32 0, i32 1 157 %a_a = load i32* %g5, align 4 158 ret i32 %a_a 159 ; CHECK-LABEL: @test12( 160 ; CHECK: getelementptr %struct.A* %a, i64 0, i32 1 161 ; CHECK-NEXT: store i32 10, i32* %g3 162 ; CHECK-NEXT: ret i32 10 163 } 164 165 166 ; PR2235 167 %S = type { i32, [ 100 x i32] } 168 define i1 @test13(i64 %X, %S* %P) { 169 %A = getelementptr inbounds %S* %P, i32 0, i32 1, i64 %X 170 %B = getelementptr inbounds %S* %P, i32 0, i32 0 171 %C = icmp eq i32* %A, %B 172 ret i1 %C 173 ; CHECK-LABEL: @test13( 174 ; CHECK: %C = icmp eq i64 %X, -1 175 } 176 177 define <2 x i1> @test13_vector(<2 x i64> %X, <2 x %S*> %P) nounwind { 178 ; CHECK-LABEL: @test13_vector( 179 ; CHECK-NEXT: shl nuw <2 x i64> %X, <i64 2, i64 2> 180 ; CHECK-NEXT: add <2 x i64> %A.idx, <i64 4, i64 4> 181 ; CHECK-NEXT: icmp eq <2 x i64> %A.offs, zeroinitializer 182 %A = getelementptr inbounds <2 x %S*> %P, <2 x i64> zeroinitializer, <2 x i32> <i32 1, i32 1>, <2 x i64> %X 183 %B = getelementptr inbounds <2 x %S*> %P, <2 x i64> <i64 0, i64 0>, <2 x i32> <i32 0, i32 0> 184 %C = icmp eq <2 x i32*> %A, %B 185 ret <2 x i1> %C 186 } 187 188 define i1 @test13_as1(i16 %X, %S addrspace(1)* %P) { 189 ; CHECK-LABEL: @test13_as1( 190 ; CHECK-NEXT: %C = icmp eq i16 %X, -1 191 ; CHECK-NEXT: ret i1 %C 192 %A = getelementptr inbounds %S addrspace(1)* %P, i16 0, i32 1, i16 %X 193 %B = getelementptr inbounds %S addrspace(1)* %P, i16 0, i32 0 194 %C = icmp eq i32 addrspace(1)* %A, %B 195 ret i1 %C 196 } 197 198 define <2 x i1> @test13_vector_as1(<2 x i16> %X, <2 x %S addrspace(1)*> %P) { 199 ; CHECK-LABEL: @test13_vector_as1( 200 ; CHECK-NEXT: shl nuw <2 x i16> %X, <i16 2, i16 2> 201 ; CHECK-NEXT: add <2 x i16> %A.idx, <i16 4, i16 4> 202 ; CHECK-NEXT: icmp eq <2 x i16> %A.offs, zeroinitializer 203 ; CHECK-NEXT: ret <2 x i1> 204 %A = getelementptr inbounds <2 x %S addrspace(1)*> %P, <2 x i16> <i16 0, i16 0>, <2 x i32> <i32 1, i32 1>, <2 x i16> %X 205 %B = getelementptr inbounds <2 x %S addrspace(1)*> %P, <2 x i16> <i16 0, i16 0>, <2 x i32> <i32 0, i32 0> 206 %C = icmp eq <2 x i32 addrspace(1)*> %A, %B 207 ret <2 x i1> %C 208 } 209 210 define i1 @test13_i32(i32 %X, %S* %P) { 211 ; CHECK-LABEL: @test13_i32( 212 ; CHECK: %C = icmp eq i32 %X, -1 213 %A = getelementptr inbounds %S* %P, i32 0, i32 1, i32 %X 214 %B = getelementptr inbounds %S* %P, i32 0, i32 0 215 %C = icmp eq i32* %A, %B 216 ret i1 %C 217 } 218 219 define i1 @test13_i16(i16 %X, %S* %P) { 220 ; CHECK-LABEL: @test13_i16( 221 ; CHECK: %C = icmp eq i16 %X, -1 222 %A = getelementptr inbounds %S* %P, i16 0, i32 1, i16 %X 223 %B = getelementptr inbounds %S* %P, i16 0, i32 0 224 %C = icmp eq i32* %A, %B 225 ret i1 %C 226 } 227 228 define i1 @test13_i128(i128 %X, %S* %P) { 229 ; CHECK-LABEL: @test13_i128( 230 ; CHECK: %C = icmp eq i64 %1, -1 231 %A = getelementptr inbounds %S* %P, i128 0, i32 1, i128 %X 232 %B = getelementptr inbounds %S* %P, i128 0, i32 0 233 %C = icmp eq i32* %A, %B 234 ret i1 %C 235 } 236 237 238 @G = external global [3 x i8] 239 define i8* @test14(i32 %Idx) { 240 %idx = zext i32 %Idx to i64 241 %tmp = getelementptr i8* getelementptr ([3 x i8]* @G, i32 0, i32 0), i64 %idx 242 ret i8* %tmp 243 ; CHECK-LABEL: @test14( 244 ; CHECK: getelementptr [3 x i8]* @G, i64 0, i64 %idx 245 } 246 247 248 ; Test folding of constantexpr geps into normal geps. 249 @Array = external global [40 x i32] 250 define i32 *@test15(i64 %X) { 251 %A = getelementptr i32* getelementptr ([40 x i32]* @Array, i64 0, i64 0), i64 %X 252 ret i32* %A 253 ; CHECK-LABEL: @test15( 254 ; CHECK: getelementptr [40 x i32]* @Array, i64 0, i64 %X 255 } 256 257 258 define i32* @test16(i32* %X, i32 %Idx) { 259 %R = getelementptr i32* %X, i32 %Idx 260 ret i32* %R 261 ; CHECK-LABEL: @test16( 262 ; CHECK: sext i32 %Idx to i64 263 } 264 265 266 define i1 @test17(i16* %P, i32 %I, i32 %J) { 267 %X = getelementptr inbounds i16* %P, i32 %I 268 %Y = getelementptr inbounds i16* %P, i32 %J 269 %C = icmp ult i16* %X, %Y 270 ret i1 %C 271 ; CHECK-LABEL: @test17( 272 ; CHECK: %C = icmp slt i32 %I, %J 273 } 274 275 define i1 @test18(i16* %P, i32 %I) { 276 %X = getelementptr inbounds i16* %P, i32 %I 277 %C = icmp ult i16* %X, %P 278 ret i1 %C 279 ; CHECK-LABEL: @test18( 280 ; CHECK: %C = icmp slt i32 %I, 0 281 } 282 283 ; Larger than the pointer size for a non-zero address space 284 define i1 @test18_as1(i16 addrspace(1)* %P, i32 %I) { 285 ; CHECK-LABEL: @test18_as1( 286 ; CHECK-NEXT: %1 = trunc i32 %I to i16 287 ; CHECK-NEXT: %C = icmp slt i16 %1, 0 288 ; CHECK-NEXT: ret i1 %C 289 %X = getelementptr inbounds i16 addrspace(1)* %P, i32 %I 290 %C = icmp ult i16 addrspace(1)* %X, %P 291 ret i1 %C 292 } 293 294 ; Smaller than the pointer size for a non-zero address space 295 define i1 @test18_as1_i32(i16 addrspace(1)* %P, i32 %I) { 296 ; CHECK-LABEL: @test18_as1_i32( 297 ; CHECK-NEXT: %1 = trunc i32 %I to i16 298 ; CHECK-NEXT: %C = icmp slt i16 %1, 0 299 ; CHECK-NEXT: ret i1 %C 300 %X = getelementptr inbounds i16 addrspace(1)* %P, i32 %I 301 %C = icmp ult i16 addrspace(1)* %X, %P 302 ret i1 %C 303 } 304 305 ; Smaller than pointer size 306 define i1 @test18_i16(i16* %P, i16 %I) { 307 ; CHECK-LABEL: @test18_i16( 308 ; CHECK: %C = icmp slt i16 %I, 0 309 %X = getelementptr inbounds i16* %P, i16 %I 310 %C = icmp ult i16* %X, %P 311 ret i1 %C 312 } 313 314 ; Same as pointer size 315 define i1 @test18_i64(i16* %P, i64 %I) { 316 ; CHECK-LABEL: @test18_i64( 317 ; CHECK: %C = icmp slt i64 %I, 0 318 %X = getelementptr inbounds i16* %P, i64 %I 319 %C = icmp ult i16* %X, %P 320 ret i1 %C 321 } 322 323 ; Larger than the pointer size 324 define i1 @test18_i128(i16* %P, i128 %I) { 325 ; CHECK-LABEL: @test18_i128( 326 ; CHECK: %C = icmp slt i64 %1, 0 327 %X = getelementptr inbounds i16* %P, i128 %I 328 %C = icmp ult i16* %X, %P 329 ret i1 %C 330 } 331 332 define i32 @test19(i32* %P, i32 %A, i32 %B) { 333 %tmp.4 = getelementptr inbounds i32* %P, i32 %A 334 %tmp.9 = getelementptr inbounds i32* %P, i32 %B 335 %tmp.10 = icmp eq i32* %tmp.4, %tmp.9 336 %tmp.11 = zext i1 %tmp.10 to i32 337 ret i32 %tmp.11 338 ; CHECK-LABEL: @test19( 339 ; CHECK: icmp eq i32 %A, %B 340 } 341 342 define i32 @test20(i32* %P, i32 %A, i32 %B) { 343 %tmp.4 = getelementptr inbounds i32* %P, i32 %A 344 %tmp.6 = icmp eq i32* %tmp.4, %P 345 %tmp.7 = zext i1 %tmp.6 to i32 346 ret i32 %tmp.7 347 ; CHECK-LABEL: @test20( 348 ; CHECK: icmp eq i32 %A, 0 349 } 350 351 define i32 @test20_as1(i32 addrspace(1)* %P, i32 %A, i32 %B) { 352 %tmp.4 = getelementptr inbounds i32 addrspace(1)* %P, i32 %A 353 %tmp.6 = icmp eq i32 addrspace(1)* %tmp.4, %P 354 %tmp.7 = zext i1 %tmp.6 to i32 355 ret i32 %tmp.7 356 ; CHECK-LABEL: @test20_as1( 357 ; CHECK: icmp eq i16 %1, 0 358 } 359 360 361 define i32 @test21() { 362 %pbob1 = alloca %intstruct 363 %pbob2 = getelementptr %intstruct* %pbob1 364 %pbobel = getelementptr %intstruct* %pbob2, i64 0, i32 0 365 %rval = load i32* %pbobel 366 ret i32 %rval 367 ; CHECK-LABEL: @test21( 368 ; CHECK: getelementptr %intstruct* %pbob1, i64 0, i32 0 369 } 370 371 372 @A = global i32 1 ; <i32*> [#uses=1] 373 @B = global i32 2 ; <i32*> [#uses=1] 374 375 define i1 @test22() { 376 %C = icmp ult i32* getelementptr (i32* @A, i64 1), 377 getelementptr (i32* @B, i64 2) 378 ret i1 %C 379 ; CHECK-LABEL: @test22( 380 ; CHECK: icmp ult (i32* getelementptr inbounds (i32* @A, i64 1), i32* getelementptr (i32* @B, i64 2)) 381 } 382 383 384 %X = type { [10 x i32], float } 385 386 define i1 @test23() { 387 %A = getelementptr %X* null, i64 0, i32 0, i64 0 ; <i32*> [#uses=1] 388 %B = icmp ne i32* %A, null ; <i1> [#uses=1] 389 ret i1 %B 390 ; CHECK-LABEL: @test23( 391 ; CHECK: ret i1 false 392 } 393 394 define void @test25() { 395 entry: 396 %tmp = getelementptr { i64, i64, i64, i64 }* null, i32 0, i32 3 ; <i64*> [#uses=1] 397 %tmp.upgrd.1 = load i64* %tmp ; <i64> [#uses=1] 398 %tmp8.ui = load i64* null ; <i64> [#uses=1] 399 %tmp8 = bitcast i64 %tmp8.ui to i64 ; <i64> [#uses=1] 400 %tmp9 = and i64 %tmp8, %tmp.upgrd.1 ; <i64> [#uses=1] 401 %sext = trunc i64 %tmp9 to i32 ; <i32> [#uses=1] 402 %tmp27.i = sext i32 %sext to i64 ; <i64> [#uses=1] 403 tail call void @foo25( i32 0, i64 %tmp27.i ) 404 unreachable 405 ; CHECK-LABEL: @test25( 406 } 407 408 declare void @foo25(i32, i64) 409 410 411 ; PR1637 412 define i1 @test26(i8* %arr) { 413 %X = getelementptr i8* %arr, i32 1 414 %Y = getelementptr i8* %arr, i32 1 415 %test = icmp uge i8* %X, %Y 416 ret i1 %test 417 ; CHECK-LABEL: @test26( 418 ; CHECK: ret i1 true 419 } 420 421 %struct.__large_struct = type { [100 x i64] } 422 %struct.compat_siginfo = type { i32, i32, i32, { [29 x i32] } } 423 %struct.siginfo_t = type { i32, i32, i32, { { i32, i32, [0 x i8], %struct.sigval_t, i32 }, [88 x i8] } } 424 %struct.sigval_t = type { i8* } 425 426 define i32 @test27(%struct.compat_siginfo* %to, %struct.siginfo_t* %from) { 427 entry: 428 %from_addr = alloca %struct.siginfo_t* 429 %tmp344 = load %struct.siginfo_t** %from_addr, align 8 430 %tmp345 = getelementptr %struct.siginfo_t* %tmp344, i32 0, i32 3 431 %tmp346 = getelementptr { { i32, i32, [0 x i8], %struct.sigval_t, i32 }, [88 x i8] }* %tmp345, i32 0, i32 0 432 %tmp346347 = bitcast { i32, i32, [0 x i8], %struct.sigval_t, i32 }* %tmp346 to { i32, i32, %struct.sigval_t }* 433 %tmp348 = getelementptr { i32, i32, %struct.sigval_t }* %tmp346347, i32 0, i32 2 434 %tmp349 = getelementptr %struct.sigval_t* %tmp348, i32 0, i32 0 435 %tmp349350 = bitcast i8** %tmp349 to i32* 436 %tmp351 = load i32* %tmp349350, align 8 437 %tmp360 = call i32 asm sideeffect "...", 438 "=r,ir,*m,i,0,~{dirflag},~{fpsr},~{flags}"( i32 %tmp351, 439 %struct.__large_struct* null, i32 -14, i32 0 ) 440 unreachable 441 ; CHECK-LABEL: @test27( 442 } 443 444 ; PR1978 445 %struct.x = type <{ i8 }> 446 @.str = internal constant [6 x i8] c"Main!\00" 447 @.str1 = internal constant [12 x i8] c"destroy %p\0A\00" 448 449 define i32 @test28() nounwind { 450 entry: 451 %orientations = alloca [1 x [1 x %struct.x]] 452 %tmp3 = call i32 @puts( i8* getelementptr ([6 x i8]* @.str, i32 0, i32 0) ) nounwind 453 %tmp45 = getelementptr inbounds [1 x [1 x %struct.x]]* %orientations, i32 1, i32 0, i32 0 454 %orientations62 = getelementptr [1 x [1 x %struct.x]]* %orientations, i32 0, i32 0, i32 0 455 br label %bb10 456 457 bb10: 458 %indvar = phi i32 [ 0, %entry ], [ %indvar.next, %bb10 ] 459 %tmp.0.reg2mem.0.rec = mul i32 %indvar, -1 460 %tmp12.rec = add i32 %tmp.0.reg2mem.0.rec, -1 461 %tmp12 = getelementptr inbounds %struct.x* %tmp45, i32 %tmp12.rec 462 %tmp16 = call i32 (i8*, ...)* @printf( i8* getelementptr ([12 x i8]* @.str1, i32 0, i32 0), %struct.x* %tmp12 ) nounwind 463 %tmp84 = icmp eq %struct.x* %tmp12, %orientations62 464 %indvar.next = add i32 %indvar, 1 465 br i1 %tmp84, label %bb17, label %bb10 466 467 bb17: 468 ret i32 0 469 ; CHECK-LABEL: @test28( 470 ; CHECK: icmp eq i32 %indvar, 0 471 } 472 473 declare i32 @puts(i8*) 474 475 declare i32 @printf(i8*, ...) 476 477 478 479 480 ; rdar://6762290 481 %T = type <{ i64, i64, i64 }> 482 define i32 @test29(i8* %start, i32 %X) nounwind { 483 entry: 484 %tmp3 = load i64* null 485 %add.ptr = getelementptr i8* %start, i64 %tmp3 486 %tmp158 = load i32* null 487 %add.ptr159 = getelementptr %T* null, i32 %tmp158 488 %add.ptr209 = getelementptr i8* %start, i64 0 489 %add.ptr212 = getelementptr i8* %add.ptr209, i32 %X 490 %cmp214 = icmp ugt i8* %add.ptr212, %add.ptr 491 br i1 %cmp214, label %if.then216, label %if.end363 492 493 if.then216: 494 ret i32 1 495 496 if.end363: 497 ret i32 0 498 ; CHECK-LABEL: @test29( 499 } 500 501 502 ; PR3694 503 define i32 @test30(i32 %m, i32 %n) nounwind { 504 entry: 505 %0 = alloca i32, i32 %n, align 4 506 %1 = bitcast i32* %0 to [0 x i32]* 507 call void @test30f(i32* %0) nounwind 508 %2 = getelementptr [0 x i32]* %1, i32 0, i32 %m 509 %3 = load i32* %2, align 4 510 ret i32 %3 511 ; CHECK-LABEL: @test30( 512 ; CHECK: getelementptr i32 513 } 514 515 declare void @test30f(i32*) 516 517 518 519 define i1 @test31(i32* %A) { 520 %B = getelementptr i32* %A, i32 1 521 %C = getelementptr i32* %A, i64 1 522 %V = icmp eq i32* %B, %C 523 ret i1 %V 524 ; CHECK-LABEL: @test31( 525 ; CHECK: ret i1 true 526 } 527 528 529 ; PR1345 530 define i8* @test32(i8* %v) { 531 %A = alloca [4 x i8*], align 16 532 %B = getelementptr [4 x i8*]* %A, i32 0, i32 0 533 store i8* null, i8** %B 534 %C = bitcast [4 x i8*]* %A to { [16 x i8] }* 535 %D = getelementptr { [16 x i8] }* %C, i32 0, i32 0, i32 8 536 %E = bitcast i8* %D to i8** 537 store i8* %v, i8** %E 538 %F = getelementptr [4 x i8*]* %A, i32 0, i32 2 539 %G = load i8** %F 540 ret i8* %G 541 ; CHECK-LABEL: @test32( 542 ; CHECK: %D = getelementptr [4 x i8*]* %A, i64 0, i64 1 543 ; CHECK: %F = getelementptr [4 x i8*]* %A, i64 0, i64 2 544 } 545 546 ; PR3290 547 %struct.Key = type { { i32, i32 } } 548 %struct.anon = type <{ i8, [3 x i8], i32 }> 549 550 define i32* @test33(%struct.Key* %A) { 551 ; CHECK-LABEL: @test33( 552 ; CHECK: getelementptr %struct.Key* %A, i64 0, i32 0, i32 1 553 %B = bitcast %struct.Key* %A to %struct.anon* 554 %C = getelementptr %struct.anon* %B, i32 0, i32 2 555 ret i32* %C 556 } 557 558 define i32 addrspace(1)* @test33_as1(%struct.Key addrspace(1)* %A) { 559 ; CHECK-LABEL: @test33_as1( 560 ; CHECK: getelementptr %struct.Key addrspace(1)* %A, i16 0, i32 0, i32 1 561 %B = bitcast %struct.Key addrspace(1)* %A to %struct.anon addrspace(1)* 562 %C = getelementptr %struct.anon addrspace(1)* %B, i32 0, i32 2 563 ret i32 addrspace(1)* %C 564 } 565 566 define i32 addrspace(1)* @test33_array_as1([10 x i32] addrspace(1)* %A) { 567 ; CHECK-LABEL: @test33_array_as1( 568 ; CHECK: getelementptr [10 x i32] addrspace(1)* %A, i16 0, i16 2 569 %B = bitcast [10 x i32] addrspace(1)* %A to [5 x i32] addrspace(1)* 570 %C = getelementptr [5 x i32] addrspace(1)* %B, i32 0, i32 2 571 ret i32 addrspace(1)* %C 572 } 573 574 ; Make sure the GEP indices use the right pointer sized integer 575 define i32 addrspace(1)* @test33_array_struct_as1([10 x %struct.Key] addrspace(1)* %A) { 576 ; CHECK-LABEL: @test33_array_struct_as1( 577 ; CHECK: getelementptr [10 x %struct.Key] addrspace(1)* %A, i16 0, i16 1, i32 0, i32 0 578 %B = bitcast [10 x %struct.Key] addrspace(1)* %A to [20 x i32] addrspace(1)* 579 %C = getelementptr [20 x i32] addrspace(1)* %B, i32 0, i32 2 580 ret i32 addrspace(1)* %C 581 } 582 583 %T2 = type { i8*, i8 } 584 define i8* @test34(i8* %Val, i64 %V) nounwind { 585 entry: 586 %A = alloca %T2, align 8 587 %mrv_gep = bitcast %T2* %A to i64* 588 %B = getelementptr %T2* %A, i64 0, i32 0 589 590 store i64 %V, i64* %mrv_gep 591 %C = load i8** %B, align 8 592 ret i8* %C 593 ; CHECK-LABEL: @test34( 594 ; CHECK: %V.c = inttoptr i64 %V to i8* 595 ; CHECK: ret i8* %V.c 596 } 597 598 %t0 = type { i8*, [19 x i8] } 599 %t1 = type { i8*, [0 x i8] } 600 601 @array = external global [11 x i8] 602 603 @s = external global %t0 604 @"\01LC8" = external constant [17 x i8] 605 606 ; Instcombine should be able to fold this getelementptr. 607 608 define i32 @test35() nounwind { 609 call i32 (i8*, ...)* @printf(i8* getelementptr ([17 x i8]* @"\01LC8", i32 0, i32 0), 610 i8* getelementptr (%t1* bitcast (%t0* @s to %t1*), i32 0, i32 1, i32 0)) nounwind 611 ret i32 0 612 ; CHECK-LABEL: @test35( 613 ; CHECK: call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([17 x i8]* @"\01LC8", i64 0, i64 0), i8* getelementptr inbounds (%t0* @s, i64 0, i32 1, i64 0)) [[NUW:#[0-9]+]] 614 } 615 616 ; Instcombine should constant-fold the GEP so that indices that have 617 ; static array extents are within bounds of those array extents. 618 ; In the below, -1 is not in the range [0,11). After the transformation, 619 ; the same address is computed, but 3 is in the range of [0,11). 620 621 define i8* @test36() nounwind { 622 ret i8* getelementptr ([11 x i8]* @array, i32 0, i64 -1) 623 ; CHECK-LABEL: @test36( 624 ; CHECK: ret i8* getelementptr ([11 x i8]* @array, i64 1676976733973595601, i64 4) 625 } 626 627 ; Instcombine shouldn't assume that gep(A,0,1) != gep(A,1,0). 628 @A37 = external constant [1 x i8] 629 define i1 @test37() nounwind { 630 ; CHECK-LABEL: @test37( 631 ; CHECK: ret i1 true 632 %t = icmp eq i8* getelementptr ([1 x i8]* @A37, i64 0, i64 1), 633 getelementptr ([1 x i8]* @A37, i64 1, i64 0) 634 ret i1 %t 635 } 636 637 ; Test index promotion 638 define i32* @test38(i32* %I, i32 %n) { 639 %A = getelementptr i32* %I, i32 %n 640 ret i32* %A 641 ; CHECK-LABEL: @test38( 642 ; CHECK: = sext i32 %n to i64 643 ; CHECK: %A = getelementptr i32* %I, i64 % 644 } 645 646 ; Test that we don't duplicate work when the second gep is a "bitcast". 647 %pr10322_t = type { i8* } 648 declare void @pr10322_f2(%pr10322_t*) 649 declare void @pr10322_f3(i8**) 650 define void @pr10322_f1(%pr10322_t* %foo) { 651 entry: 652 %arrayidx8 = getelementptr inbounds %pr10322_t* %foo, i64 2 653 call void @pr10322_f2(%pr10322_t* %arrayidx8) nounwind 654 %tmp2 = getelementptr inbounds %pr10322_t* %arrayidx8, i64 0, i32 0 655 call void @pr10322_f3(i8** %tmp2) nounwind 656 ret void 657 658 ; CHECK-LABEL: @pr10322_f1( 659 ; CHECK: %tmp2 = getelementptr inbounds %pr10322_t* %arrayidx8, i64 0, i32 0 660 } 661 662 ; Test that we combine the last two geps in this sequence, before we 663 ; would wait for gep1 and gep2 to be combined and never combine 2 and 3. 664 %three_gep_t = type {i32} 665 %three_gep_t2 = type {%three_gep_t} 666 667 define void @three_gep_f(%three_gep_t2* %x) { 668 %gep1 = getelementptr %three_gep_t2* %x, i64 2 669 call void @three_gep_h(%three_gep_t2* %gep1) 670 %gep2 = getelementptr %three_gep_t2* %gep1, i64 0, i32 0 671 %gep3 = getelementptr %three_gep_t* %gep2, i64 0, i32 0 672 call void @three_gep_g(i32* %gep3) 673 674 ; CHECK-LABEL: @three_gep_f( 675 ; CHECK: %gep3 = getelementptr %three_gep_t2* %gep1, i64 0, i32 0, i32 0 676 ret void 677 } 678 679 declare void @three_gep_g(i32*) 680 declare void @three_gep_h(%three_gep_t2*) 681 682 %struct.ham = type { i32, %struct.zot*, %struct.zot*, %struct.zot* } 683 %struct.zot = type { i64, i8 } 684 685 define void @test39(%struct.ham* %arg, i8 %arg1) nounwind { 686 %tmp = getelementptr inbounds %struct.ham* %arg, i64 0, i32 2 687 %tmp2 = load %struct.zot** %tmp, align 8 688 %tmp3 = bitcast %struct.zot* %tmp2 to i8* 689 %tmp4 = getelementptr inbounds i8* %tmp3, i64 -8 690 store i8 %arg1, i8* %tmp4, align 8 691 ret void 692 693 ; CHECK-LABEL: @test39( 694 ; CHECK: getelementptr inbounds %struct.ham* %arg, i64 0, i32 2 695 ; CHECK: getelementptr inbounds i8* %tmp3, i64 -8 696 } 697 698 define i1 @pr16483([1 x i8]* %a, [1 x i8]* %b) { 699 %c = getelementptr [1 x i8]* %a, i32 0, i32 0 700 %d = getelementptr [1 x i8]* %b, i32 0, i32 0 701 %cmp = icmp ult i8* %c, %d 702 ret i1 %cmp 703 704 ; CHECK-LABEL: @pr16483( 705 ; CHECK-NEXT: icmp ult [1 x i8]* %a, %b 706 } 707 708 define i8 @test_gep_bitcast_as1(i32 addrspace(1)* %arr, i16 %N) { 709 ; CHECK-LABEL: @test_gep_bitcast_as1( 710 ; CHECK: getelementptr i32 addrspace(1)* %arr, i16 %N 711 ; CHECK: bitcast 712 %cast = bitcast i32 addrspace(1)* %arr to i8 addrspace(1)* 713 %V = mul i16 %N, 4 714 %t = getelementptr i8 addrspace(1)* %cast, i16 %V 715 %x = load i8 addrspace(1)* %t 716 ret i8 %x 717 } 718 719 ; The element size of the array matches the element size of the pointer 720 define i64 @test_gep_bitcast_array_same_size_element([100 x double]* %arr, i64 %N) { 721 ; CHECK-LABEL: @test_gep_bitcast_array_same_size_element( 722 ; CHECK: getelementptr [100 x double]* %arr, i64 0, i64 %V 723 ; CHECK: bitcast 724 %cast = bitcast [100 x double]* %arr to i64* 725 %V = mul i64 %N, 8 726 %t = getelementptr i64* %cast, i64 %V 727 %x = load i64* %t 728 ret i64 %x 729 } 730 731 ; gep should be done in the original address space. 732 define i64 @test_gep_bitcast_array_same_size_element_addrspacecast([100 x double]* %arr, i64 %N) { 733 ; CHECK-LABEL: @test_gep_bitcast_array_same_size_element_addrspacecast( 734 ; CHECK: getelementptr [100 x double]* %arr, i64 0, i64 %V 735 ; CHECK-NEXT: bitcast double* 736 ; CHECK-NEXT: %t = addrspacecast i64* 737 ; CHECK: load i64 addrspace(3)* %t 738 %cast = addrspacecast [100 x double]* %arr to i64 addrspace(3)* 739 %V = mul i64 %N, 8 740 %t = getelementptr i64 addrspace(3)* %cast, i64 %V 741 %x = load i64 addrspace(3)* %t 742 ret i64 %x 743 } 744 745 ; The element size of the array is different the element size of the pointer 746 define i8 @test_gep_bitcast_array_different_size_element([100 x double]* %arr, i64 %N) { 747 ; CHECK-LABEL: @test_gep_bitcast_array_different_size_element( 748 ; CHECK: getelementptr [100 x double]* %arr, i64 0, i64 %N 749 ; CHECK: bitcast 750 %cast = bitcast [100 x double]* %arr to i8* 751 %V = mul i64 %N, 8 752 %t = getelementptr i8* %cast, i64 %V 753 %x = load i8* %t 754 ret i8 %x 755 } 756 757 define i64 @test_gep_bitcast_array_same_size_element_as1([100 x double] addrspace(1)* %arr, i16 %N) { 758 ; CHECK-LABEL: @test_gep_bitcast_array_same_size_element_as1( 759 ; CHECK: getelementptr [100 x double] addrspace(1)* %arr, i16 0, i16 %V 760 ; CHECK: bitcast 761 %cast = bitcast [100 x double] addrspace(1)* %arr to i64 addrspace(1)* 762 %V = mul i16 %N, 8 763 %t = getelementptr i64 addrspace(1)* %cast, i16 %V 764 %x = load i64 addrspace(1)* %t 765 ret i64 %x 766 } 767 768 define i8 @test_gep_bitcast_array_different_size_element_as1([100 x double] addrspace(1)* %arr, i16 %N) { 769 ; CHECK-LABEL: @test_gep_bitcast_array_different_size_element_as1( 770 ; CHECK: getelementptr [100 x double] addrspace(1)* %arr, i16 0, i16 %N 771 ; CHECK: bitcast 772 %cast = bitcast [100 x double] addrspace(1)* %arr to i8 addrspace(1)* 773 %V = mul i16 %N, 8 774 %t = getelementptr i8 addrspace(1)* %cast, i16 %V 775 %x = load i8 addrspace(1)* %t 776 ret i8 %x 777 } 778 779 define i64 @test40() { 780 %array = alloca [3 x i32], align 4 781 %gep = getelementptr inbounds [3 x i32]* %array, i64 0, i64 2 782 %gepi8 = bitcast i32* %gep to i8* 783 %p = ptrtoint [3 x i32]* %array to i64 784 %np = sub i64 0, %p 785 %gep2 = getelementptr i8* %gepi8, i64 %np 786 %ret = ptrtoint i8* %gep2 to i64 787 ret i64 %ret 788 789 ; CHECK-LABEL: @test40 790 ; CHECK-NEXT: ret i64 8 791 } 792 793 define i16 @test41([3 x i32] addrspace(1)* %array) { 794 %gep = getelementptr inbounds [3 x i32] addrspace(1)* %array, i16 0, i16 2 795 %gepi8 = bitcast i32 addrspace(1)* %gep to i8 addrspace(1)* 796 %p = ptrtoint [3 x i32] addrspace(1)* %array to i16 797 %np = sub i16 0, %p 798 %gep2 = getelementptr i8 addrspace(1)* %gepi8, i16 %np 799 %ret = ptrtoint i8 addrspace(1)* %gep2 to i16 800 ret i16 %ret 801 802 ; CHECK-LABEL: @test41( 803 ; CHECK-NEXT: ret i16 8 804 } 805 806 define i32 addrspace(1)* @ascast_0_gep(i32* %p) nounwind { 807 ; CHECK-LABEL: @ascast_0_gep( 808 ; CHECK-NOT: getelementptr 809 ; CHECK: ret 810 %gep = getelementptr i32* %p, i32 0 811 %x = addrspacecast i32* %gep to i32 addrspace(1)* 812 ret i32 addrspace(1)* %x 813 } 814 815 ; Do not merge the GEP and the addrspacecast, because it would undo the 816 ; addrspacecast canonicalization. 817 define i32 addrspace(1)* @ascast_0_0_gep([128 x i32]* %p) nounwind { 818 ; CHECK-LABEL: @ascast_0_0_gep( 819 ; CHECK-NEXT: getelementptr [128 x i32] 820 ; CHECK-NEXT: addrspacecast i32* 821 ; CHECK-NEXT: ret i32 addrspace(1)* 822 %gep = getelementptr [128 x i32]* %p, i32 0, i32 0 823 %x = addrspacecast i32* %gep to i32 addrspace(1)* 824 ret i32 addrspace(1)* %x 825 } 826 827 ; CHECK: attributes [[NUW]] = { nounwind } 828
