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 1 "." "main.cpp" 22 .loc 1 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 1 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 1 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 1 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 1 10 3 # main.cpp:10:3 55 movl %ebx, %eax 56 .loc 1 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_loc,"",@progbits 69.Ldebug_loc0: 70 .quad .Lfunc_begin0-.Lfunc_begin0 71 .quad .Ltmp1-.Lfunc_begin0 72 .short 1 # Loc expr size 73 .byte 85 # super-register DW_OP_reg5 74 .quad .Ltmp1-.Lfunc_begin0 75 .quad .Ltmp3-.Lfunc_begin0 76 .short 1 # Loc expr size 77 .byte 83 # super-register DW_OP_reg3 78 .quad .Ltmp3-.Lfunc_begin0 79 .quad .Lfunc_end0-.Lfunc_begin0 80 .short 4 # Loc expr size 81 .byte 243 # DW_OP_GNU_entry_value 82 .byte 1 # 1 83 .byte 85 # super-register DW_OP_reg5 84 .byte 159 # DW_OP_stack_value 85 .quad 0 86 .quad 0 87.Ldebug_loc1: 88 .quad .Lfunc_begin0-.Lfunc_begin0 89 .quad .Ltmp2-.Lfunc_begin0 90 .short 1 # Loc expr size 91 .byte 84 # DW_OP_reg4 92 .quad .Ltmp2-.Lfunc_begin0 93 .quad .Lfunc_end0-.Lfunc_begin0 94 .short 4 # Loc expr size 95 .byte 243 # DW_OP_GNU_entry_value 96 .byte 1 # 1 97 .byte 84 # DW_OP_reg4 98 .byte 159 # DW_OP_stack_value 99 .quad 0 100 .quad 0 101.Ldebug_loc2: 102 .quad .Ltmp2-.Lfunc_begin0 103 .quad .Ltmp3-.Lfunc_begin0 104 .short 3 # Loc expr size 105 .byte 17 # DW_OP_consts 106 .byte 0 # 0 107 .byte 159 # DW_OP_stack_value 108 .quad .Ltmp3-.Lfunc_begin0 109 .quad .Ltmp4-.Lfunc_begin0 110 .short 1 # Loc expr size 111 .byte 83 # super-register DW_OP_reg3 112 .quad .Ltmp4-.Lfunc_begin0 113 .quad .Lfunc_end0-.Lfunc_begin0 114 .short 1 # Loc expr size 115 .byte 80 # super-register DW_OP_reg0 116 .quad 0 117 .quad 0 118 .section .debug_abbrev,"",@progbits 119 .byte 1 # Abbreviation Code 120 .byte 17 # DW_TAG_compile_unit 121 .byte 1 # DW_CHILDREN_yes 122 .byte 37 # DW_AT_producer 123 .byte 14 # DW_FORM_strp 124 .byte 19 # DW_AT_language 125 .byte 5 # DW_FORM_data2 126 .byte 3 # DW_AT_name 127 .byte 14 # DW_FORM_strp 128 .byte 16 # DW_AT_stmt_list 129 .byte 23 # DW_FORM_sec_offset 130 .byte 27 # DW_AT_comp_dir 131 .byte 14 # DW_FORM_strp 132 .byte 17 # DW_AT_low_pc 133 .byte 1 # DW_FORM_addr 134 .byte 18 # DW_AT_high_pc 135 .byte 6 # DW_FORM_data4 136 .byte 0 # EOM(1) 137 .byte 0 # EOM(2) 138 .byte 2 # Abbreviation Code 139 .byte 46 # DW_TAG_subprogram 140 .byte 1 # DW_CHILDREN_yes 141 .byte 110 # DW_AT_linkage_name 142 .byte 14 # DW_FORM_strp 143 .byte 3 # DW_AT_name 144 .byte 14 # DW_FORM_strp 145 .byte 58 # DW_AT_decl_file 146 .byte 11 # DW_FORM_data1 147 .byte 59 # DW_AT_decl_line 148 .byte 11 # DW_FORM_data1 149 .byte 73 # DW_AT_type 150 .byte 19 # DW_FORM_ref4 151 .byte 32 # DW_AT_inline 152 .byte 11 # DW_FORM_data1 153 .byte 0 # EOM(1) 154 .byte 0 # EOM(2) 155 .byte 3 # Abbreviation Code 156 .byte 5 # DW_TAG_formal_parameter 157 .byte 0 # DW_CHILDREN_no 158 .byte 3 # DW_AT_name 159 .byte 14 # DW_FORM_strp 160 .byte 58 # DW_AT_decl_file 161 .byte 11 # DW_FORM_data1 162 .byte 59 # DW_AT_decl_line 163 .byte 11 # DW_FORM_data1 164 .byte 73 # DW_AT_type 165 .byte 19 # DW_FORM_ref4 166 .byte 0 # EOM(1) 167 .byte 0 # EOM(2) 168 .byte 4 # Abbreviation Code 169 .byte 36 # DW_TAG_base_type 170 .byte 0 # DW_CHILDREN_no 171 .byte 3 # DW_AT_name 172 .byte 14 # DW_FORM_strp 173 .byte 62 # DW_AT_encoding 174 .byte 11 # DW_FORM_data1 175 .byte 11 # DW_AT_byte_size 176 .byte 11 # DW_FORM_data1 177 .byte 0 # EOM(1) 178 .byte 0 # EOM(2) 179 .byte 5 # Abbreviation Code 180 .byte 46 # DW_TAG_subprogram 181 .byte 1 # DW_CHILDREN_yes 182 .byte 17 # DW_AT_low_pc 183 .byte 1 # DW_FORM_addr 184 .byte 18 # DW_AT_high_pc 185 .byte 6 # DW_FORM_data4 186 .byte 64 # DW_AT_frame_base 187 .byte 24 # DW_FORM_exprloc 188 .ascii "\227B" # DW_AT_GNU_all_call_sites 189 .byte 25 # DW_FORM_flag_present 190 .byte 3 # DW_AT_name 191 .byte 14 # DW_FORM_strp 192 .byte 58 # DW_AT_decl_file 193 .byte 11 # DW_FORM_data1 194 .byte 59 # DW_AT_decl_line 195 .byte 11 # DW_FORM_data1 196 .byte 73 # DW_AT_type 197 .byte 19 # DW_FORM_ref4 198 .byte 63 # DW_AT_external 199 .byte 25 # DW_FORM_flag_present 200 .byte 0 # EOM(1) 201 .byte 0 # EOM(2) 202 .byte 6 # Abbreviation Code 203 .byte 5 # DW_TAG_formal_parameter 204 .byte 0 # DW_CHILDREN_no 205 .byte 2 # DW_AT_location 206 .byte 23 # DW_FORM_sec_offset 207 .byte 3 # DW_AT_name 208 .byte 14 # DW_FORM_strp 209 .byte 58 # DW_AT_decl_file 210 .byte 11 # DW_FORM_data1 211 .byte 59 # DW_AT_decl_line 212 .byte 11 # DW_FORM_data1 213 .byte 73 # DW_AT_type 214 .byte 19 # DW_FORM_ref4 215 .byte 0 # EOM(1) 216 .byte 0 # EOM(2) 217 .byte 7 # Abbreviation Code 218 .byte 52 # DW_TAG_variable 219 .byte 0 # DW_CHILDREN_no 220 .byte 2 # DW_AT_location 221 .byte 23 # DW_FORM_sec_offset 222 .byte 3 # DW_AT_name 223 .byte 14 # DW_FORM_strp 224 .byte 58 # DW_AT_decl_file 225 .byte 11 # DW_FORM_data1 226 .byte 59 # DW_AT_decl_line 227 .byte 11 # DW_FORM_data1 228 .byte 73 # DW_AT_type 229 .byte 19 # DW_FORM_ref4 230 .byte 0 # EOM(1) 231 .byte 0 # EOM(2) 232 .byte 8 # Abbreviation Code 233 .byte 29 # DW_TAG_inlined_subroutine 234 .byte 1 # DW_CHILDREN_yes 235 .byte 49 # DW_AT_abstract_origin 236 .byte 19 # DW_FORM_ref4 237 .byte 17 # DW_AT_low_pc 238 .byte 1 # DW_FORM_addr 239 .byte 18 # DW_AT_high_pc 240 .byte 6 # DW_FORM_data4 241 .byte 88 # DW_AT_call_file 242 .byte 11 # DW_FORM_data1 243 .byte 89 # DW_AT_call_line 244 .byte 11 # DW_FORM_data1 245 .byte 87 # DW_AT_call_column 246 .byte 11 # DW_FORM_data1 247 .byte 0 # EOM(1) 248 .byte 0 # EOM(2) 249 .byte 9 # Abbreviation Code 250 .byte 5 # DW_TAG_formal_parameter 251 .byte 0 # DW_CHILDREN_no 252 .byte 2 # DW_AT_location 253 .byte 24 # DW_FORM_exprloc 254 .byte 49 # DW_AT_abstract_origin 255 .byte 19 # DW_FORM_ref4 256 .byte 0 # EOM(1) 257 .byte 0 # EOM(2) 258 .byte 10 # Abbreviation Code 259 .ascii "\211\202\001" # DW_TAG_GNU_call_site 260 .byte 0 # DW_CHILDREN_no 261 .byte 49 # DW_AT_abstract_origin 262 .byte 19 # DW_FORM_ref4 263 .byte 17 # DW_AT_low_pc 264 .byte 1 # DW_FORM_addr 265 .byte 0 # EOM(1) 266 .byte 0 # EOM(2) 267 .byte 11 # Abbreviation Code 268 .byte 46 # DW_TAG_subprogram 269 .byte 0 # DW_CHILDREN_no 270 .byte 110 # DW_AT_linkage_name 271 .byte 14 # DW_FORM_strp 272 .byte 3 # DW_AT_name 273 .byte 14 # DW_FORM_strp 274 .byte 58 # DW_AT_decl_file 275 .byte 11 # DW_FORM_data1 276 .byte 59 # DW_AT_decl_line 277 .byte 11 # DW_FORM_data1 278 .byte 60 # DW_AT_declaration 279 .byte 25 # DW_FORM_flag_present 280 .byte 63 # DW_AT_external 281 .byte 25 # DW_FORM_flag_present 282 .byte 0 # EOM(1) 283 .byte 0 # EOM(2) 284 .byte 12 # Abbreviation Code 285 .byte 15 # DW_TAG_pointer_type 286 .byte 0 # DW_CHILDREN_no 287 .byte 73 # DW_AT_type 288 .byte 19 # DW_FORM_ref4 289 .byte 0 # EOM(1) 290 .byte 0 # EOM(2) 291 .byte 0 # EOM(3) 292 .section .debug_info,"",@progbits 293.Lcu_begin0: 294 .long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit 295.Ldebug_info_start0: 296 .short 4 # DWARF version number 297 .long .debug_abbrev # Offset Into Abbrev. Section 298 .byte 8 # Address Size (in bytes) 299 .byte 1 # Abbrev [1] 0xb:0xcf DW_TAG_compile_unit 300 .long .Linfo_string0 # DW_AT_producer 301 .short 33 # DW_AT_language 302 .long .Linfo_string1 # DW_AT_name 303 .long .Lline_table_start0 # DW_AT_stmt_list 304 .long .Linfo_string2 # DW_AT_comp_dir 305 .quad .Lfunc_begin0 # DW_AT_low_pc 306 .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc 307 .byte 2 # Abbrev [2] 0x2a:0x1c DW_TAG_subprogram 308 .long .Linfo_string3 # DW_AT_linkage_name 309 .long .Linfo_string4 # DW_AT_name 310 .byte 1 # DW_AT_decl_file 311 .byte 1 # DW_AT_decl_line 312 .long 70 # DW_AT_type 313 .byte 1 # DW_AT_inline 314 .byte 3 # Abbrev [3] 0x3a:0xb DW_TAG_formal_parameter 315 .long .Linfo_string6 # DW_AT_name 316 .byte 1 # DW_AT_decl_file 317 .byte 1 # DW_AT_decl_line 318 .long 70 # DW_AT_type 319 .byte 0 # End Of Children Mark 320 .byte 4 # Abbrev [4] 0x46:0x7 DW_TAG_base_type 321 .long .Linfo_string5 # DW_AT_name 322 .byte 5 # DW_AT_encoding 323 .byte 4 # DW_AT_byte_size 324 .byte 5 # Abbrev [5] 0x4d:0x70 DW_TAG_subprogram 325 .quad .Lfunc_begin0 # DW_AT_low_pc 326 .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc 327 .byte 1 # DW_AT_frame_base 328 .byte 87 329 # DW_AT_GNU_all_call_sites 330 .long .Linfo_string9 # DW_AT_name 331 .byte 1 # DW_AT_decl_file 332 .byte 5 # DW_AT_decl_line 333 .long 70 # DW_AT_type 334 # DW_AT_external 335 .byte 6 # Abbrev [6] 0x66:0xf DW_TAG_formal_parameter 336 .long .Ldebug_loc0 # DW_AT_location 337 .long .Linfo_string10 # DW_AT_name 338 .byte 1 # DW_AT_decl_file 339 .byte 5 # DW_AT_decl_line 340 .long 70 # DW_AT_type 341 .byte 6 # Abbrev [6] 0x75:0xf DW_TAG_formal_parameter 342 .long .Ldebug_loc1 # DW_AT_location 343 .long .Linfo_string11 # DW_AT_name 344 .byte 1 # DW_AT_decl_file 345 .byte 5 # DW_AT_decl_line 346 .long 200 # DW_AT_type 347 .byte 7 # Abbrev [7] 0x84:0xf DW_TAG_variable 348 .long .Ldebug_loc2 # DW_AT_location 349 .long .Linfo_string13 # DW_AT_name 350 .byte 1 # DW_AT_decl_file 351 .byte 8 # DW_AT_decl_line 352 .long 70 # DW_AT_type 353 .byte 8 # Abbrev [8] 0x93:0x1c DW_TAG_inlined_subroutine 354 .long 42 # DW_AT_abstract_origin 355 .quad .Ltmp2 # DW_AT_low_pc 356 .long .Ltmp3-.Ltmp2 # DW_AT_high_pc 357 .byte 1 # DW_AT_call_file 358 .byte 9 # DW_AT_call_line 359 .byte 32 # DW_AT_call_column 360 .byte 9 # Abbrev [9] 0xa7:0x7 DW_TAG_formal_parameter 361 .byte 1 # DW_AT_location 362 .byte 83 363 .long 58 # DW_AT_abstract_origin 364 .byte 0 # End Of Children Mark 365 .byte 10 # Abbrev [10] 0xaf:0xd DW_TAG_GNU_call_site 366 .long 189 # DW_AT_abstract_origin 367 .quad .Ltmp2 # DW_AT_low_pc 368 .byte 0 # End Of Children Mark 369 .byte 11 # Abbrev [11] 0xbd:0xb DW_TAG_subprogram 370 .long .Linfo_string7 # DW_AT_linkage_name 371 .long .Linfo_string8 # DW_AT_name 372 .byte 1 # DW_AT_decl_file 373 .byte 4 # DW_AT_decl_line 374 # DW_AT_declaration 375 # DW_AT_external 376 .byte 12 # Abbrev [12] 0xc8:0x5 DW_TAG_pointer_type 377 .long 205 # DW_AT_type 378 .byte 12 # Abbrev [12] 0xcd:0x5 DW_TAG_pointer_type 379 .long 210 # DW_AT_type 380 .byte 4 # Abbrev [4] 0xd2:0x7 DW_TAG_base_type 381 .long .Linfo_string12 # DW_AT_name 382 .byte 6 # DW_AT_encoding 383 .byte 1 # DW_AT_byte_size 384 .byte 0 # End Of Children Mark 385.Ldebug_info_end0: 386 .section .debug_str,"MS",@progbits,1 387.Linfo_string0: 388 .asciz "clang version 17.0.0 (https://github.com/llvm/llvm-project.git 640e07c49037cca41a1bfbeb916b569d8c950aea)" # string offset=0 389.Linfo_string1: 390 .asciz "main.cpp" # string offset=105 391.Linfo_string2: 392 .asciz "." # string offset=114 393.Linfo_string3: 394 .asciz "_ZL6helperi" # string offset=152 395.Linfo_string4: 396 .asciz "helper" # string offset=164 397.Linfo_string5: 398 .asciz "int" # string offset=171 399.Linfo_string6: 400 .asciz "i" # string offset=175 401.Linfo_string7: 402 .asciz "_Z13may_not_existv" # string offset=177 403.Linfo_string8: 404 .asciz "may_not_exist" # string offset=196 405.Linfo_string9: 406 .asciz "main" # string offset=210 407.Linfo_string10: 408 .asciz "argc" # string offset=215 409.Linfo_string11: 410 .asciz "argv" # string offset=220 411.Linfo_string12: 412 .asciz "char" # string offset=225 413.Linfo_string13: 414 .asciz "j" # string offset=230 415 .weak _Z13may_not_existv 416 .ident "clang version 17.0.0 (https://github.com/llvm/llvm-project.git 640e07c49037cca41a1bfbeb916b569d8c950aea)" 417 .section ".note.GNU-stack","",@progbits 418 .addrsig 419 .addrsig_sym _Z13may_not_existv 420 .section .debug_line,"",@progbits 421.Lline_table_start0: 422