1# -g2 -gdwarf-4 main.cpp -O1 2# static int helper(int i) { 3# return ++i; 4# } 5# void may_not_exist(void) __attribute__ ((weak)); 6# int main(int argc, char *argv[]) { 7# if (may_not_exist) 8# may_not_exist(); 9# int j = 0; 10# [[clang::always_inline]] j = helper(argc); 11# return j; 12# } 13 14 .text 15 .file "main.cpp" 16 .globl main # -- Begin function main 17 .p2align 4, 0x90 18 .type main,@function 19main: # @main 20.Lfunc_begin0: 21 .file 0 "." "main.cpp" md5 0x375df0e93c6d762413bfe2708333ecaf 22 .loc 0 5 0 # main.cpp:5:0 23 .cfi_startproc 24# %bb.0: # %entry 25 #DEBUG_VALUE: main:argc <- $edi 26 #DEBUG_VALUE: main:argv <- $rsi 27 pushq %rbx 28 .cfi_def_cfa_offset 16 29 .cfi_offset %rbx, -16 30 movl %edi, %ebx 31.Ltmp0: 32 .loc 0 6 7 prologue_end # main.cpp:6:7 33 cmpq $0, _Z13may_not_existv@GOTPCREL(%rip) 34 je .LBB0_2 35.Ltmp1: 36# %bb.1: # %if.then 37 #DEBUG_VALUE: main:argc <- $ebx 38 #DEBUG_VALUE: main:argv <- $rsi 39 .loc 0 7 5 # main.cpp:7:5 40 callq _Z13may_not_existv@PLT 41.Ltmp2: 42 #DEBUG_VALUE: main:argv <- [DW_OP_LLVM_entry_value 1] $rsi 43.LBB0_2: # %if.end 44 #DEBUG_VALUE: main:argc <- $ebx 45 #DEBUG_VALUE: main:argv <- [DW_OP_LLVM_entry_value 1] $rsi 46 #DEBUG_VALUE: main:j <- 0 47 #DEBUG_VALUE: helper:i <- $ebx 48 .loc 0 2 10 # main.cpp:2:10 49 incl %ebx 50.Ltmp3: 51 #DEBUG_VALUE: main:argc <- [DW_OP_LLVM_entry_value 1] $edi 52 #DEBUG_VALUE: helper:i <- $ebx 53 #DEBUG_VALUE: main:j <- $ebx 54 .loc 0 10 3 # main.cpp:10:3 55 movl %ebx, %eax 56 .loc 0 10 3 epilogue_begin is_stmt 0 # main.cpp:10:3 57 popq %rbx 58.Ltmp4: 59 #DEBUG_VALUE: helper:i <- $eax 60 #DEBUG_VALUE: main:j <- $eax 61 .cfi_def_cfa_offset 8 62 retq 63.Ltmp5: 64.Lfunc_end0: 65 .size main, .Lfunc_end0-main 66 .cfi_endproc 67 # -- End function 68 .section .debug_loclists,"",@progbits 69 .long .Ldebug_list_header_end0-.Ldebug_list_header_start0 # Length 70.Ldebug_list_header_start0: 71 .short 5 # Version 72 .byte 8 # Address size 73 .byte 0 # Segment selector size 74 .long 3 # Offset entry count 75.Lloclists_table_base0: 76 .long .Ldebug_loc0-.Lloclists_table_base0 77 .long .Ldebug_loc1-.Lloclists_table_base0 78 .long .Ldebug_loc2-.Lloclists_table_base0 79.Ldebug_loc0: 80 .byte 4 # DW_LLE_offset_pair 81 .uleb128 .Lfunc_begin0-.Lfunc_begin0 # starting offset 82 .uleb128 .Ltmp1-.Lfunc_begin0 # ending offset 83 .byte 1 # Loc expr size 84 .byte 85 # super-register DW_OP_reg5 85 .byte 4 # DW_LLE_offset_pair 86 .uleb128 .Ltmp1-.Lfunc_begin0 # starting offset 87 .uleb128 .Ltmp3-.Lfunc_begin0 # ending offset 88 .byte 1 # Loc expr size 89 .byte 83 # super-register DW_OP_reg3 90 .byte 4 # DW_LLE_offset_pair 91 .uleb128 .Ltmp3-.Lfunc_begin0 # starting offset 92 .uleb128 .Lfunc_end0-.Lfunc_begin0 # ending offset 93 .byte 4 # Loc expr size 94 .byte 163 # DW_OP_entry_value 95 .byte 1 # 1 96 .byte 85 # super-register DW_OP_reg5 97 .byte 159 # DW_OP_stack_value 98 .byte 0 # DW_LLE_end_of_list 99.Ldebug_loc1: 100 .byte 4 # DW_LLE_offset_pair 101 .uleb128 .Lfunc_begin0-.Lfunc_begin0 # starting offset 102 .uleb128 .Ltmp2-.Lfunc_begin0 # ending offset 103 .byte 1 # Loc expr size 104 .byte 84 # DW_OP_reg4 105 .byte 4 # DW_LLE_offset_pair 106 .uleb128 .Ltmp2-.Lfunc_begin0 # starting offset 107 .uleb128 .Lfunc_end0-.Lfunc_begin0 # ending offset 108 .byte 4 # Loc expr size 109 .byte 163 # DW_OP_entry_value 110 .byte 1 # 1 111 .byte 84 # DW_OP_reg4 112 .byte 159 # DW_OP_stack_value 113 .byte 0 # DW_LLE_end_of_list 114.Ldebug_loc2: 115 .byte 4 # DW_LLE_offset_pair 116 .uleb128 .Ltmp2-.Lfunc_begin0 # starting offset 117 .uleb128 .Ltmp3-.Lfunc_begin0 # ending offset 118 .byte 3 # Loc expr size 119 .byte 17 # DW_OP_consts 120 .byte 0 # 0 121 .byte 159 # DW_OP_stack_value 122 .byte 4 # DW_LLE_offset_pair 123 .uleb128 .Ltmp3-.Lfunc_begin0 # starting offset 124 .uleb128 .Ltmp4-.Lfunc_begin0 # ending offset 125 .byte 1 # Loc expr size 126 .byte 83 # super-register DW_OP_reg3 127 .byte 4 # DW_LLE_offset_pair 128 .uleb128 .Ltmp4-.Lfunc_begin0 # starting offset 129 .uleb128 .Lfunc_end0-.Lfunc_begin0 # ending offset 130 .byte 1 # Loc expr size 131 .byte 80 # super-register DW_OP_reg0 132 .byte 0 # DW_LLE_end_of_list 133.Ldebug_list_header_end0: 134 .section .debug_abbrev,"",@progbits 135 .byte 1 # Abbreviation Code 136 .byte 17 # DW_TAG_compile_unit 137 .byte 1 # DW_CHILDREN_yes 138 .byte 37 # DW_AT_producer 139 .byte 37 # DW_FORM_strx1 140 .byte 19 # DW_AT_language 141 .byte 5 # DW_FORM_data2 142 .byte 3 # DW_AT_name 143 .byte 37 # DW_FORM_strx1 144 .byte 114 # DW_AT_str_offsets_base 145 .byte 23 # DW_FORM_sec_offset 146 .byte 16 # DW_AT_stmt_list 147 .byte 23 # DW_FORM_sec_offset 148 .byte 27 # DW_AT_comp_dir 149 .byte 37 # DW_FORM_strx1 150 .byte 17 # DW_AT_low_pc 151 .byte 27 # DW_FORM_addrx 152 .byte 18 # DW_AT_high_pc 153 .byte 6 # DW_FORM_data4 154 .byte 115 # DW_AT_addr_base 155 .byte 23 # DW_FORM_sec_offset 156 .ascii "\214\001" # DW_AT_loclists_base 157 .byte 23 # DW_FORM_sec_offset 158 .byte 0 # EOM(1) 159 .byte 0 # EOM(2) 160 .byte 2 # Abbreviation Code 161 .byte 46 # DW_TAG_subprogram 162 .byte 1 # DW_CHILDREN_yes 163 .byte 110 # DW_AT_linkage_name 164 .byte 37 # DW_FORM_strx1 165 .byte 3 # DW_AT_name 166 .byte 37 # DW_FORM_strx1 167 .byte 58 # DW_AT_decl_file 168 .byte 11 # DW_FORM_data1 169 .byte 59 # DW_AT_decl_line 170 .byte 11 # DW_FORM_data1 171 .byte 73 # DW_AT_type 172 .byte 19 # DW_FORM_ref4 173 .byte 32 # DW_AT_inline 174 .byte 33 # DW_FORM_implicit_const 175 .byte 1 176 .byte 0 # EOM(1) 177 .byte 0 # EOM(2) 178 .byte 3 # Abbreviation Code 179 .byte 5 # DW_TAG_formal_parameter 180 .byte 0 # DW_CHILDREN_no 181 .byte 3 # DW_AT_name 182 .byte 37 # DW_FORM_strx1 183 .byte 58 # DW_AT_decl_file 184 .byte 11 # DW_FORM_data1 185 .byte 59 # DW_AT_decl_line 186 .byte 11 # DW_FORM_data1 187 .byte 73 # DW_AT_type 188 .byte 19 # DW_FORM_ref4 189 .byte 0 # EOM(1) 190 .byte 0 # EOM(2) 191 .byte 4 # Abbreviation Code 192 .byte 36 # DW_TAG_base_type 193 .byte 0 # DW_CHILDREN_no 194 .byte 3 # DW_AT_name 195 .byte 37 # DW_FORM_strx1 196 .byte 62 # DW_AT_encoding 197 .byte 11 # DW_FORM_data1 198 .byte 11 # DW_AT_byte_size 199 .byte 11 # DW_FORM_data1 200 .byte 0 # EOM(1) 201 .byte 0 # EOM(2) 202 .byte 5 # Abbreviation Code 203 .byte 46 # DW_TAG_subprogram 204 .byte 1 # DW_CHILDREN_yes 205 .byte 17 # DW_AT_low_pc 206 .byte 27 # DW_FORM_addrx 207 .byte 18 # DW_AT_high_pc 208 .byte 6 # DW_FORM_data4 209 .byte 64 # DW_AT_frame_base 210 .byte 24 # DW_FORM_exprloc 211 .byte 122 # DW_AT_call_all_calls 212 .byte 25 # DW_FORM_flag_present 213 .byte 3 # DW_AT_name 214 .byte 37 # DW_FORM_strx1 215 .byte 58 # DW_AT_decl_file 216 .byte 11 # DW_FORM_data1 217 .byte 59 # DW_AT_decl_line 218 .byte 11 # DW_FORM_data1 219 .byte 73 # DW_AT_type 220 .byte 19 # DW_FORM_ref4 221 .byte 63 # DW_AT_external 222 .byte 25 # DW_FORM_flag_present 223 .byte 0 # EOM(1) 224 .byte 0 # EOM(2) 225 .byte 6 # Abbreviation Code 226 .byte 5 # DW_TAG_formal_parameter 227 .byte 0 # DW_CHILDREN_no 228 .byte 2 # DW_AT_location 229 .byte 34 # DW_FORM_loclistx 230 .byte 3 # DW_AT_name 231 .byte 37 # DW_FORM_strx1 232 .byte 58 # DW_AT_decl_file 233 .byte 11 # DW_FORM_data1 234 .byte 59 # DW_AT_decl_line 235 .byte 11 # DW_FORM_data1 236 .byte 73 # DW_AT_type 237 .byte 19 # DW_FORM_ref4 238 .byte 0 # EOM(1) 239 .byte 0 # EOM(2) 240 .byte 7 # Abbreviation Code 241 .byte 52 # DW_TAG_variable 242 .byte 0 # DW_CHILDREN_no 243 .byte 2 # DW_AT_location 244 .byte 34 # DW_FORM_loclistx 245 .byte 3 # DW_AT_name 246 .byte 37 # DW_FORM_strx1 247 .byte 58 # DW_AT_decl_file 248 .byte 11 # DW_FORM_data1 249 .byte 59 # DW_AT_decl_line 250 .byte 11 # DW_FORM_data1 251 .byte 73 # DW_AT_type 252 .byte 19 # DW_FORM_ref4 253 .byte 0 # EOM(1) 254 .byte 0 # EOM(2) 255 .byte 8 # Abbreviation Code 256 .byte 29 # DW_TAG_inlined_subroutine 257 .byte 1 # DW_CHILDREN_yes 258 .byte 49 # DW_AT_abstract_origin 259 .byte 19 # DW_FORM_ref4 260 .byte 17 # DW_AT_low_pc 261 .byte 27 # DW_FORM_addrx 262 .byte 18 # DW_AT_high_pc 263 .byte 6 # DW_FORM_data4 264 .byte 88 # DW_AT_call_file 265 .byte 11 # DW_FORM_data1 266 .byte 89 # DW_AT_call_line 267 .byte 11 # DW_FORM_data1 268 .byte 87 # DW_AT_call_column 269 .byte 11 # DW_FORM_data1 270 .byte 0 # EOM(1) 271 .byte 0 # EOM(2) 272 .byte 9 # Abbreviation Code 273 .byte 5 # DW_TAG_formal_parameter 274 .byte 0 # DW_CHILDREN_no 275 .byte 2 # DW_AT_location 276 .byte 24 # DW_FORM_exprloc 277 .byte 49 # DW_AT_abstract_origin 278 .byte 19 # DW_FORM_ref4 279 .byte 0 # EOM(1) 280 .byte 0 # EOM(2) 281 .byte 10 # Abbreviation Code 282 .byte 72 # DW_TAG_call_site 283 .byte 0 # DW_CHILDREN_no 284 .byte 127 # DW_AT_call_origin 285 .byte 19 # DW_FORM_ref4 286 .byte 125 # DW_AT_call_return_pc 287 .byte 27 # DW_FORM_addrx 288 .byte 0 # EOM(1) 289 .byte 0 # EOM(2) 290 .byte 11 # Abbreviation Code 291 .byte 46 # DW_TAG_subprogram 292 .byte 0 # DW_CHILDREN_no 293 .byte 110 # DW_AT_linkage_name 294 .byte 37 # DW_FORM_strx1 295 .byte 3 # DW_AT_name 296 .byte 37 # DW_FORM_strx1 297 .byte 58 # DW_AT_decl_file 298 .byte 11 # DW_FORM_data1 299 .byte 59 # DW_AT_decl_line 300 .byte 11 # DW_FORM_data1 301 .byte 60 # DW_AT_declaration 302 .byte 25 # DW_FORM_flag_present 303 .byte 63 # DW_AT_external 304 .byte 25 # DW_FORM_flag_present 305 .byte 0 # EOM(1) 306 .byte 0 # EOM(2) 307 .byte 12 # Abbreviation Code 308 .byte 15 # DW_TAG_pointer_type 309 .byte 0 # DW_CHILDREN_no 310 .byte 73 # DW_AT_type 311 .byte 19 # DW_FORM_ref4 312 .byte 0 # EOM(1) 313 .byte 0 # EOM(2) 314 .byte 0 # EOM(3) 315 .section .debug_info,"",@progbits 316.Lcu_begin0: 317 .long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit 318.Ldebug_info_start0: 319 .short 5 # DWARF version number 320 .byte 1 # DWARF Unit Type 321 .byte 8 # Address Size (in bytes) 322 .long .debug_abbrev # Offset Into Abbrev. Section 323 .byte 1 # Abbrev [1] 0xc:0x8b DW_TAG_compile_unit 324 .byte 0 # DW_AT_producer 325 .short 33 # DW_AT_language 326 .byte 1 # DW_AT_name 327 .long .Lstr_offsets_base0 # DW_AT_str_offsets_base 328 .long .Lline_table_start0 # DW_AT_stmt_list 329 .byte 2 # DW_AT_comp_dir 330 .byte 0 # DW_AT_low_pc 331 .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc 332 .long .Laddr_table_base0 # DW_AT_addr_base 333 .long .Lloclists_table_base0 # DW_AT_loclists_base 334 .byte 2 # Abbrev [2] 0x27:0x12 DW_TAG_subprogram 335 .byte 3 # DW_AT_linkage_name 336 .byte 4 # DW_AT_name 337 .byte 0 # DW_AT_decl_file 338 .byte 1 # DW_AT_decl_line 339 .long 57 # DW_AT_type 340 # DW_AT_inline 341 .byte 3 # Abbrev [3] 0x30:0x8 DW_TAG_formal_parameter 342 .byte 6 # DW_AT_name 343 .byte 0 # DW_AT_decl_file 344 .byte 1 # DW_AT_decl_line 345 .long 57 # DW_AT_type 346 .byte 0 # End Of Children Mark 347 .byte 4 # Abbrev [4] 0x39:0x4 DW_TAG_base_type 348 .byte 5 # DW_AT_name 349 .byte 5 # DW_AT_encoding 350 .byte 4 # DW_AT_byte_size 351 .byte 5 # Abbrev [5] 0x3d:0x46 DW_TAG_subprogram 352 .byte 0 # DW_AT_low_pc 353 .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc 354 .byte 1 # DW_AT_frame_base 355 .byte 87 356 # DW_AT_call_all_calls 357 .byte 9 # DW_AT_name 358 .byte 0 # DW_AT_decl_file 359 .byte 5 # DW_AT_decl_line 360 .long 57 # DW_AT_type 361 # DW_AT_external 362 .byte 6 # Abbrev [6] 0x4c:0x9 DW_TAG_formal_parameter 363 .byte 0 # DW_AT_location 364 .byte 10 # DW_AT_name 365 .byte 0 # DW_AT_decl_file 366 .byte 5 # DW_AT_decl_line 367 .long 57 # DW_AT_type 368 .byte 6 # Abbrev [6] 0x55:0x9 DW_TAG_formal_parameter 369 .byte 1 # DW_AT_location 370 .byte 11 # DW_AT_name 371 .byte 0 # DW_AT_decl_file 372 .byte 5 # DW_AT_decl_line 373 .long 136 # DW_AT_type 374 .byte 7 # Abbrev [7] 0x5e:0x9 DW_TAG_variable 375 .byte 2 # DW_AT_location 376 .byte 13 # DW_AT_name 377 .byte 0 # DW_AT_decl_file 378 .byte 8 # DW_AT_decl_line 379 .long 57 # DW_AT_type 380 .byte 8 # Abbrev [8] 0x67:0x15 DW_TAG_inlined_subroutine 381 .long 39 # DW_AT_abstract_origin 382 .byte 1 # DW_AT_low_pc 383 .long .Ltmp3-.Ltmp2 # DW_AT_high_pc 384 .byte 0 # DW_AT_call_file 385 .byte 9 # DW_AT_call_line 386 .byte 32 # DW_AT_call_column 387 .byte 9 # Abbrev [9] 0x74:0x7 DW_TAG_formal_parameter 388 .byte 1 # DW_AT_location 389 .byte 83 390 .long 48 # DW_AT_abstract_origin 391 .byte 0 # End Of Children Mark 392 .byte 10 # Abbrev [10] 0x7c:0x6 DW_TAG_call_site 393 .long 131 # DW_AT_call_origin 394 .byte 1 # DW_AT_call_return_pc 395 .byte 0 # End Of Children Mark 396 .byte 11 # Abbrev [11] 0x83:0x5 DW_TAG_subprogram 397 .byte 7 # DW_AT_linkage_name 398 .byte 8 # DW_AT_name 399 .byte 0 # DW_AT_decl_file 400 .byte 4 # DW_AT_decl_line 401 # DW_AT_declaration 402 # DW_AT_external 403 .byte 12 # Abbrev [12] 0x88:0x5 DW_TAG_pointer_type 404 .long 141 # DW_AT_type 405 .byte 12 # Abbrev [12] 0x8d:0x5 DW_TAG_pointer_type 406 .long 146 # DW_AT_type 407 .byte 4 # Abbrev [4] 0x92:0x4 DW_TAG_base_type 408 .byte 12 # DW_AT_name 409 .byte 6 # DW_AT_encoding 410 .byte 1 # DW_AT_byte_size 411 .byte 0 # End Of Children Mark 412.Ldebug_info_end0: 413 .section .debug_str_offsets,"",@progbits 414 .long 60 # Length of String Offsets Set 415 .short 5 416 .short 0 417.Lstr_offsets_base0: 418 .section .debug_str,"MS",@progbits,1 419.Linfo_string0: 420 .asciz "clang version 17.0.0 (https://github.com/llvm/llvm-project.git 640e07c49037cca41a1bfbeb916b569d8c950aea)" # string offset=0 421.Linfo_string1: 422 .asciz "main.cpp" # string offset=105 423.Linfo_string2: 424 .asciz "." # string offset=114 425.Linfo_string3: 426 .asciz "_ZL6helperi" # string offset=152 427.Linfo_string4: 428 .asciz "helper" # string offset=164 429.Linfo_string5: 430 .asciz "int" # string offset=171 431.Linfo_string6: 432 .asciz "i" # string offset=175 433.Linfo_string7: 434 .asciz "_Z13may_not_existv" # string offset=177 435.Linfo_string8: 436 .asciz "may_not_exist" # string offset=196 437.Linfo_string9: 438 .asciz "main" # string offset=210 439.Linfo_string10: 440 .asciz "argc" # string offset=215 441.Linfo_string11: 442 .asciz "argv" # string offset=220 443.Linfo_string12: 444 .asciz "char" # string offset=225 445.Linfo_string13: 446 .asciz "j" # string offset=230 447 .section .debug_str_offsets,"",@progbits 448 .long .Linfo_string0 449 .long .Linfo_string1 450 .long .Linfo_string2 451 .long .Linfo_string3 452 .long .Linfo_string4 453 .long .Linfo_string5 454 .long .Linfo_string6 455 .long .Linfo_string7 456 .long .Linfo_string8 457 .long .Linfo_string9 458 .long .Linfo_string10 459 .long .Linfo_string11 460 .long .Linfo_string12 461 .long .Linfo_string13 462 .section .debug_addr,"",@progbits 463 .long .Ldebug_addr_end0-.Ldebug_addr_start0 # Length of contribution 464.Ldebug_addr_start0: 465 .short 5 # DWARF version number 466 .byte 8 # Address size 467 .byte 0 # Segment selector size 468.Laddr_table_base0: 469 .quad .Lfunc_begin0 470 .quad .Ltmp2 471.Ldebug_addr_end0: 472 .weak _Z13may_not_existv 473 .ident "clang version 17.0.0 (https://github.com/llvm/llvm-project.git 640e07c49037cca41a1bfbeb916b569d8c950aea)" 474 .section ".note.GNU-stack","",@progbits 475 .addrsig 476 .addrsig_sym _Z13may_not_existv 477 .section .debug_line,"",@progbits 478.Lline_table_start0: 479