# -g2 -gdwarf-4 main.cpp -O1 # static int helper(int i) { # return ++i; # } # void may_not_exist(void) __attribute__ ((weak)); # int main(int argc, char *argv[]) { # if (may_not_exist) # may_not_exist(); # int j = 0; # [[clang::always_inline]] j = helper(argc); # return j; # } .text .file "main.cpp" .globl main # -- Begin function main .p2align 4, 0x90 .type main,@function main: # @main .Lfunc_begin0: .file 0 "." "main.cpp" md5 0x375df0e93c6d762413bfe2708333ecaf .loc 0 5 0 # main.cpp:5:0 .cfi_startproc # %bb.0: # %entry #DEBUG_VALUE: main:argc <- $edi #DEBUG_VALUE: main:argv <- $rsi pushq %rbx .cfi_def_cfa_offset 16 .cfi_offset %rbx, -16 movl %edi, %ebx .Ltmp0: .loc 0 6 7 prologue_end # main.cpp:6:7 cmpq $0, _Z13may_not_existv@GOTPCREL(%rip) je .LBB0_2 .Ltmp1: # %bb.1: # %if.then #DEBUG_VALUE: main:argc <- $ebx #DEBUG_VALUE: main:argv <- $rsi .loc 0 7 5 # main.cpp:7:5 callq _Z13may_not_existv@PLT .Ltmp2: #DEBUG_VALUE: main:argv <- [DW_OP_LLVM_entry_value 1] $rsi .LBB0_2: # %if.end #DEBUG_VALUE: main:argc <- $ebx #DEBUG_VALUE: main:argv <- [DW_OP_LLVM_entry_value 1] $rsi #DEBUG_VALUE: main:j <- 0 #DEBUG_VALUE: helper:i <- $ebx .loc 0 2 10 # main.cpp:2:10 incl %ebx .Ltmp3: #DEBUG_VALUE: main:argc <- [DW_OP_LLVM_entry_value 1] $edi #DEBUG_VALUE: helper:i <- $ebx #DEBUG_VALUE: main:j <- $ebx .loc 0 10 3 # main.cpp:10:3 movl %ebx, %eax .loc 0 10 3 epilogue_begin is_stmt 0 # main.cpp:10:3 popq %rbx .Ltmp4: #DEBUG_VALUE: helper:i <- $eax #DEBUG_VALUE: main:j <- $eax .cfi_def_cfa_offset 8 retq .Ltmp5: .Lfunc_end0: .size main, .Lfunc_end0-main .cfi_endproc # -- End function .section .debug_loclists,"",@progbits .long .Ldebug_list_header_end0-.Ldebug_list_header_start0 # Length .Ldebug_list_header_start0: .short 5 # Version .byte 8 # Address size .byte 0 # Segment selector size .long 3 # Offset entry count .Lloclists_table_base0: .long .Ldebug_loc0-.Lloclists_table_base0 .long .Ldebug_loc1-.Lloclists_table_base0 .long .Ldebug_loc2-.Lloclists_table_base0 .Ldebug_loc0: .byte 4 # DW_LLE_offset_pair .uleb128 .Lfunc_begin0-.Lfunc_begin0 # starting offset .uleb128 .Ltmp1-.Lfunc_begin0 # ending offset .byte 1 # Loc expr size .byte 85 # super-register DW_OP_reg5 .byte 4 # DW_LLE_offset_pair .uleb128 .Ltmp1-.Lfunc_begin0 # starting offset .uleb128 .Ltmp3-.Lfunc_begin0 # ending offset .byte 1 # Loc expr size .byte 83 # super-register DW_OP_reg3 .byte 4 # DW_LLE_offset_pair .uleb128 .Ltmp3-.Lfunc_begin0 # starting offset .uleb128 .Lfunc_end0-.Lfunc_begin0 # ending offset .byte 4 # Loc expr size .byte 163 # DW_OP_entry_value .byte 1 # 1 .byte 85 # super-register DW_OP_reg5 .byte 159 # DW_OP_stack_value .byte 0 # DW_LLE_end_of_list .Ldebug_loc1: .byte 4 # DW_LLE_offset_pair .uleb128 .Lfunc_begin0-.Lfunc_begin0 # starting offset .uleb128 .Ltmp2-.Lfunc_begin0 # ending offset .byte 1 # Loc expr size .byte 84 # DW_OP_reg4 .byte 4 # DW_LLE_offset_pair .uleb128 .Ltmp2-.Lfunc_begin0 # starting offset .uleb128 .Lfunc_end0-.Lfunc_begin0 # ending offset .byte 4 # Loc expr size .byte 163 # DW_OP_entry_value .byte 1 # 1 .byte 84 # DW_OP_reg4 .byte 159 # DW_OP_stack_value .byte 0 # DW_LLE_end_of_list .Ldebug_loc2: .byte 4 # DW_LLE_offset_pair .uleb128 .Ltmp2-.Lfunc_begin0 # starting offset .uleb128 .Ltmp3-.Lfunc_begin0 # ending offset .byte 3 # Loc expr size .byte 17 # DW_OP_consts .byte 0 # 0 .byte 159 # DW_OP_stack_value .byte 4 # DW_LLE_offset_pair .uleb128 .Ltmp3-.Lfunc_begin0 # starting offset .uleb128 .Ltmp4-.Lfunc_begin0 # ending offset .byte 1 # Loc expr size .byte 83 # super-register DW_OP_reg3 .byte 4 # DW_LLE_offset_pair .uleb128 .Ltmp4-.Lfunc_begin0 # starting offset .uleb128 .Lfunc_end0-.Lfunc_begin0 # ending offset .byte 1 # Loc expr size .byte 80 # super-register DW_OP_reg0 .byte 0 # DW_LLE_end_of_list .Ldebug_list_header_end0: .section .debug_abbrev,"",@progbits .byte 1 # Abbreviation Code .byte 17 # DW_TAG_compile_unit .byte 1 # DW_CHILDREN_yes .byte 37 # DW_AT_producer .byte 37 # DW_FORM_strx1 .byte 19 # DW_AT_language .byte 5 # DW_FORM_data2 .byte 3 # DW_AT_name .byte 37 # DW_FORM_strx1 .byte 114 # DW_AT_str_offsets_base .byte 23 # DW_FORM_sec_offset .byte 16 # DW_AT_stmt_list .byte 23 # DW_FORM_sec_offset .byte 27 # DW_AT_comp_dir .byte 37 # DW_FORM_strx1 .byte 17 # DW_AT_low_pc .byte 27 # DW_FORM_addrx .byte 18 # DW_AT_high_pc .byte 6 # DW_FORM_data4 .byte 115 # DW_AT_addr_base .byte 23 # DW_FORM_sec_offset .ascii "\214\001" # DW_AT_loclists_base .byte 23 # DW_FORM_sec_offset .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 2 # Abbreviation Code .byte 46 # DW_TAG_subprogram .byte 1 # DW_CHILDREN_yes .byte 110 # DW_AT_linkage_name .byte 37 # DW_FORM_strx1 .byte 3 # DW_AT_name .byte 37 # DW_FORM_strx1 .byte 58 # DW_AT_decl_file .byte 11 # DW_FORM_data1 .byte 59 # DW_AT_decl_line .byte 11 # DW_FORM_data1 .byte 73 # DW_AT_type .byte 19 # DW_FORM_ref4 .byte 32 # DW_AT_inline .byte 33 # DW_FORM_implicit_const .byte 1 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 3 # Abbreviation Code .byte 5 # DW_TAG_formal_parameter .byte 0 # DW_CHILDREN_no .byte 3 # DW_AT_name .byte 37 # DW_FORM_strx1 .byte 58 # DW_AT_decl_file .byte 11 # DW_FORM_data1 .byte 59 # DW_AT_decl_line .byte 11 # DW_FORM_data1 .byte 73 # DW_AT_type .byte 19 # DW_FORM_ref4 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 4 # Abbreviation Code .byte 36 # DW_TAG_base_type .byte 0 # DW_CHILDREN_no .byte 3 # DW_AT_name .byte 37 # DW_FORM_strx1 .byte 62 # DW_AT_encoding .byte 11 # DW_FORM_data1 .byte 11 # DW_AT_byte_size .byte 11 # DW_FORM_data1 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 5 # Abbreviation Code .byte 46 # DW_TAG_subprogram .byte 1 # DW_CHILDREN_yes .byte 17 # DW_AT_low_pc .byte 27 # DW_FORM_addrx .byte 18 # DW_AT_high_pc .byte 6 # DW_FORM_data4 .byte 64 # DW_AT_frame_base .byte 24 # DW_FORM_exprloc .byte 122 # DW_AT_call_all_calls .byte 25 # DW_FORM_flag_present .byte 3 # DW_AT_name .byte 37 # DW_FORM_strx1 .byte 58 # DW_AT_decl_file .byte 11 # DW_FORM_data1 .byte 59 # DW_AT_decl_line .byte 11 # DW_FORM_data1 .byte 73 # DW_AT_type .byte 19 # DW_FORM_ref4 .byte 63 # DW_AT_external .byte 25 # DW_FORM_flag_present .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 6 # Abbreviation Code .byte 5 # DW_TAG_formal_parameter .byte 0 # DW_CHILDREN_no .byte 2 # DW_AT_location .byte 34 # DW_FORM_loclistx .byte 3 # DW_AT_name .byte 37 # DW_FORM_strx1 .byte 58 # DW_AT_decl_file .byte 11 # DW_FORM_data1 .byte 59 # DW_AT_decl_line .byte 11 # DW_FORM_data1 .byte 73 # DW_AT_type .byte 19 # DW_FORM_ref4 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 7 # Abbreviation Code .byte 52 # DW_TAG_variable .byte 0 # DW_CHILDREN_no .byte 2 # DW_AT_location .byte 34 # DW_FORM_loclistx .byte 3 # DW_AT_name .byte 37 # DW_FORM_strx1 .byte 58 # DW_AT_decl_file .byte 11 # DW_FORM_data1 .byte 59 # DW_AT_decl_line .byte 11 # DW_FORM_data1 .byte 73 # DW_AT_type .byte 19 # DW_FORM_ref4 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 8 # Abbreviation Code .byte 29 # DW_TAG_inlined_subroutine .byte 1 # DW_CHILDREN_yes .byte 49 # DW_AT_abstract_origin .byte 19 # DW_FORM_ref4 .byte 17 # DW_AT_low_pc .byte 27 # DW_FORM_addrx .byte 18 # DW_AT_high_pc .byte 6 # DW_FORM_data4 .byte 88 # DW_AT_call_file .byte 11 # DW_FORM_data1 .byte 89 # DW_AT_call_line .byte 11 # DW_FORM_data1 .byte 87 # DW_AT_call_column .byte 11 # DW_FORM_data1 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 9 # Abbreviation Code .byte 5 # DW_TAG_formal_parameter .byte 0 # DW_CHILDREN_no .byte 2 # DW_AT_location .byte 24 # DW_FORM_exprloc .byte 49 # DW_AT_abstract_origin .byte 19 # DW_FORM_ref4 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 10 # Abbreviation Code .byte 72 # DW_TAG_call_site .byte 0 # DW_CHILDREN_no .byte 127 # DW_AT_call_origin .byte 19 # DW_FORM_ref4 .byte 125 # DW_AT_call_return_pc .byte 27 # DW_FORM_addrx .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 11 # Abbreviation Code .byte 46 # DW_TAG_subprogram .byte 0 # DW_CHILDREN_no .byte 110 # DW_AT_linkage_name .byte 37 # DW_FORM_strx1 .byte 3 # DW_AT_name .byte 37 # DW_FORM_strx1 .byte 58 # DW_AT_decl_file .byte 11 # DW_FORM_data1 .byte 59 # DW_AT_decl_line .byte 11 # DW_FORM_data1 .byte 60 # DW_AT_declaration .byte 25 # DW_FORM_flag_present .byte 63 # DW_AT_external .byte 25 # DW_FORM_flag_present .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 12 # Abbreviation Code .byte 15 # DW_TAG_pointer_type .byte 0 # DW_CHILDREN_no .byte 73 # DW_AT_type .byte 19 # DW_FORM_ref4 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 0 # EOM(3) .section .debug_info,"",@progbits .Lcu_begin0: .long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit .Ldebug_info_start0: .short 5 # DWARF version number .byte 1 # DWARF Unit Type .byte 8 # Address Size (in bytes) .long .debug_abbrev # Offset Into Abbrev. Section .byte 1 # Abbrev [1] 0xc:0x8b DW_TAG_compile_unit .byte 0 # DW_AT_producer .short 33 # DW_AT_language .byte 1 # DW_AT_name .long .Lstr_offsets_base0 # DW_AT_str_offsets_base .long .Lline_table_start0 # DW_AT_stmt_list .byte 2 # DW_AT_comp_dir .byte 0 # DW_AT_low_pc .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc .long .Laddr_table_base0 # DW_AT_addr_base .long .Lloclists_table_base0 # DW_AT_loclists_base .byte 2 # Abbrev [2] 0x27:0x12 DW_TAG_subprogram .byte 3 # DW_AT_linkage_name .byte 4 # DW_AT_name .byte 0 # DW_AT_decl_file .byte 1 # DW_AT_decl_line .long 57 # DW_AT_type # DW_AT_inline .byte 3 # Abbrev [3] 0x30:0x8 DW_TAG_formal_parameter .byte 6 # DW_AT_name .byte 0 # DW_AT_decl_file .byte 1 # DW_AT_decl_line .long 57 # DW_AT_type .byte 0 # End Of Children Mark .byte 4 # Abbrev [4] 0x39:0x4 DW_TAG_base_type .byte 5 # DW_AT_name .byte 5 # DW_AT_encoding .byte 4 # DW_AT_byte_size .byte 5 # Abbrev [5] 0x3d:0x46 DW_TAG_subprogram .byte 0 # DW_AT_low_pc .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc .byte 1 # DW_AT_frame_base .byte 87 # DW_AT_call_all_calls .byte 9 # DW_AT_name .byte 0 # DW_AT_decl_file .byte 5 # DW_AT_decl_line .long 57 # DW_AT_type # DW_AT_external .byte 6 # Abbrev [6] 0x4c:0x9 DW_TAG_formal_parameter .byte 0 # DW_AT_location .byte 10 # DW_AT_name .byte 0 # DW_AT_decl_file .byte 5 # DW_AT_decl_line .long 57 # DW_AT_type .byte 6 # Abbrev [6] 0x55:0x9 DW_TAG_formal_parameter .byte 1 # DW_AT_location .byte 11 # DW_AT_name .byte 0 # DW_AT_decl_file .byte 5 # DW_AT_decl_line .long 136 # DW_AT_type .byte 7 # Abbrev [7] 0x5e:0x9 DW_TAG_variable .byte 2 # DW_AT_location .byte 13 # DW_AT_name .byte 0 # DW_AT_decl_file .byte 8 # DW_AT_decl_line .long 57 # DW_AT_type .byte 8 # Abbrev [8] 0x67:0x15 DW_TAG_inlined_subroutine .long 39 # DW_AT_abstract_origin .byte 1 # DW_AT_low_pc .long .Ltmp3-.Ltmp2 # DW_AT_high_pc .byte 0 # DW_AT_call_file .byte 9 # DW_AT_call_line .byte 32 # DW_AT_call_column .byte 9 # Abbrev [9] 0x74:0x7 DW_TAG_formal_parameter .byte 1 # DW_AT_location .byte 83 .long 48 # DW_AT_abstract_origin .byte 0 # End Of Children Mark .byte 10 # Abbrev [10] 0x7c:0x6 DW_TAG_call_site .long 131 # DW_AT_call_origin .byte 1 # DW_AT_call_return_pc .byte 0 # End Of Children Mark .byte 11 # Abbrev [11] 0x83:0x5 DW_TAG_subprogram .byte 7 # DW_AT_linkage_name .byte 8 # DW_AT_name .byte 0 # DW_AT_decl_file .byte 4 # DW_AT_decl_line # DW_AT_declaration # DW_AT_external .byte 12 # Abbrev [12] 0x88:0x5 DW_TAG_pointer_type .long 141 # DW_AT_type .byte 12 # Abbrev [12] 0x8d:0x5 DW_TAG_pointer_type .long 146 # DW_AT_type .byte 4 # Abbrev [4] 0x92:0x4 DW_TAG_base_type .byte 12 # DW_AT_name .byte 6 # DW_AT_encoding .byte 1 # DW_AT_byte_size .byte 0 # End Of Children Mark .Ldebug_info_end0: .section .debug_str_offsets,"",@progbits .long 60 # Length of String Offsets Set .short 5 .short 0 .Lstr_offsets_base0: .section .debug_str,"MS",@progbits,1 .Linfo_string0: .asciz "clang version 17.0.0 (https://github.com/llvm/llvm-project.git 640e07c49037cca41a1bfbeb916b569d8c950aea)" # string offset=0 .Linfo_string1: .asciz "main.cpp" # string offset=105 .Linfo_string2: .asciz "." # string offset=114 .Linfo_string3: .asciz "_ZL6helperi" # string offset=152 .Linfo_string4: .asciz "helper" # string offset=164 .Linfo_string5: .asciz "int" # string offset=171 .Linfo_string6: .asciz "i" # string offset=175 .Linfo_string7: .asciz "_Z13may_not_existv" # string offset=177 .Linfo_string8: .asciz "may_not_exist" # string offset=196 .Linfo_string9: .asciz "main" # string offset=210 .Linfo_string10: .asciz "argc" # string offset=215 .Linfo_string11: .asciz "argv" # string offset=220 .Linfo_string12: .asciz "char" # string offset=225 .Linfo_string13: .asciz "j" # string offset=230 .section .debug_str_offsets,"",@progbits .long .Linfo_string0 .long .Linfo_string1 .long .Linfo_string2 .long .Linfo_string3 .long .Linfo_string4 .long .Linfo_string5 .long .Linfo_string6 .long .Linfo_string7 .long .Linfo_string8 .long .Linfo_string9 .long .Linfo_string10 .long .Linfo_string11 .long .Linfo_string12 .long .Linfo_string13 .section .debug_addr,"",@progbits .long .Ldebug_addr_end0-.Ldebug_addr_start0 # Length of contribution .Ldebug_addr_start0: .short 5 # DWARF version number .byte 8 # Address size .byte 0 # Segment selector size .Laddr_table_base0: .quad .Lfunc_begin0 .quad .Ltmp2 .Ldebug_addr_end0: .weak _Z13may_not_existv .ident "clang version 17.0.0 (https://github.com/llvm/llvm-project.git 640e07c49037cca41a1bfbeb916b569d8c950aea)" .section ".note.GNU-stack","",@progbits .addrsig .addrsig_sym _Z13may_not_existv .section .debug_line,"",@progbits .Lline_table_start0: