# clang++ -g -gdwarf-4 -emit-llvm -S main.cpp # llc -O2 -mtriple=x86_64-unknown-linux-gnu main.ll # void use(int * x, int * y) { # *x += 4; # *y -= 2; # } # # int helper(int z_, int d_); # int x = 0; # int y = 1; # int main(int argc, char *argv[]) { # x = argc; # y = argc + 3; # use(&x, &y); # return helper(x, y); # } .text .file "main.cpp" .file 1 "." "main.cpp" .globl _Z3usePiS_ # -- Begin function _Z3usePiS_ .p2align 4, 0x90 .type _Z3usePiS_,@function _Z3usePiS_: # @_Z3usePiS_ .Lfunc_begin0: .loc 1 1 0 # main.cpp:1:0 .cfi_startproc # %bb.0: # %entry #DEBUG_VALUE: use:x <- $rdi #DEBUG_VALUE: use:y <- $rsi .loc 1 2 4 prologue_end # main.cpp:2:4 addl $4, (%rdi) .loc 1 3 4 # main.cpp:3:4 addl $-2, (%rsi) .loc 1 4 1 # main.cpp:4:1 retq .Ltmp0: .Lfunc_end0: .size _Z3usePiS_, .Lfunc_end0-_Z3usePiS_ .cfi_endproc # -- End function .globl main # -- Begin function main .p2align 4, 0x90 .type main,@function main: # @main .Lfunc_begin1: .loc 1 9 0 # main.cpp:9:0 .cfi_startproc # %bb.0: # %entry #DEBUG_VALUE: main:argc <- $edi #DEBUG_VALUE: main:argv <- $rsi # kill: def $edi killed $edi def $rdi .loc 1 2 4 prologue_end # main.cpp:2:4 leal 4(%rdi), %eax movl %eax, x(%rip) .Ltmp1: #DEBUG_VALUE: use:x <- undef .loc 1 3 4 # main.cpp:3:4 leal 1(%rdi), %esi .Ltmp2: #DEBUG_VALUE: main:argv <- [DW_OP_LLVM_entry_value 1] $rsi movl %esi, y(%rip) .Ltmp3: #DEBUG_VALUE: use:y <- undef .loc 1 13 11 # main.cpp:13:11 movl %eax, %edi .Ltmp4: #DEBUG_VALUE: main:argc <- [DW_OP_LLVM_entry_value 1] $edi jmp _Z6helperii # TAILCALL .Ltmp5: .Lfunc_end1: .size main, .Lfunc_end1-main .cfi_endproc # -- End function .type x,@object # @x .bss .globl x .p2align 2 x: .long 0 # 0x0 .size x, 4 .type y,@object # @y .data .globl y .p2align 2 y: .long 1 # 0x1 .size y, 4 .section .debug_loc.dwo,"e",@progbits .Ldebug_loc0: .byte 3 .byte 3 .long .Ltmp4-.Lfunc_begin1 .short 1 # Loc expr size .byte 85 # super-register DW_OP_reg5 .byte 3 .byte 5 .long .Lfunc_end1-.Ltmp4 .short 4 # Loc expr size .byte 243 # DW_OP_GNU_entry_value .byte 1 # 1 .byte 85 # super-register DW_OP_reg5 .byte 159 # DW_OP_stack_value .byte 0 .Ldebug_loc1: .byte 3 .byte 3 .long .Ltmp2-.Lfunc_begin1 .short 1 # Loc expr size .byte 84 # DW_OP_reg4 .byte 3 .byte 6 .long .Lfunc_end1-.Ltmp2 .short 4 # Loc expr size .byte 243 # DW_OP_GNU_entry_value .byte 1 # 1 .byte 84 # DW_OP_reg4 .byte 159 # DW_OP_stack_value .byte 0 .section .debug_abbrev,"",@progbits .byte 1 # Abbreviation Code .byte 17 # DW_TAG_compile_unit .byte 0 # DW_CHILDREN_no .byte 16 # DW_AT_stmt_list .byte 23 # DW_FORM_sec_offset .byte 27 # DW_AT_comp_dir .byte 14 # DW_FORM_strp .ascii "\260B" # DW_AT_GNU_dwo_name .byte 14 # DW_FORM_strp .ascii "\261B" # DW_AT_GNU_dwo_id .byte 7 # DW_FORM_data8 .byte 17 # DW_AT_low_pc .byte 1 # DW_FORM_addr .byte 18 # DW_AT_high_pc .byte 6 # DW_FORM_data4 .ascii "\263B" # DW_AT_GNU_addr_base .byte 23 # DW_FORM_sec_offset .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 4 # DWARF version number .long .debug_abbrev # Offset Into Abbrev. Section .byte 8 # Address Size (in bytes) .byte 1 # Abbrev [1] 0xb:0x25 DW_TAG_compile_unit .long .Lline_table_start0 # DW_AT_stmt_list .long .Lskel_string0 # DW_AT_comp_dir .long .Lskel_string1 # DW_AT_GNU_dwo_name .quad -4922924650784735988 # DW_AT_GNU_dwo_id .quad .Lfunc_begin0 # DW_AT_low_pc .long .Lfunc_end1-.Lfunc_begin0 # DW_AT_high_pc .long .Laddr_table_base0 # DW_AT_GNU_addr_base .Ldebug_info_end0: .section .debug_str,"MS",@progbits,1 .Lskel_string0: .asciz "." # string offset=0 .Lskel_string1: .asciz "main.dwo" # string offset=2 .section .debug_str.dwo,"eMS",@progbits,1 .Linfo_string0: .asciz "x" # string offset=0 .Linfo_string1: .asciz "int" # string offset=2 .Linfo_string2: .asciz "y" # string offset=6 .Linfo_string3: .asciz "_Z3usePiS_" # string offset=8 .Linfo_string4: .asciz "use" # string offset=19 .Linfo_string5: .asciz "_Z6helperii" # string offset=23 .Linfo_string6: .asciz "helper" # string offset=35 .Linfo_string7: .asciz "main" # string offset=42 .Linfo_string8: .asciz "argc" # string offset=47 .Linfo_string9: .asciz "argv" # string offset=52 .Linfo_string10: .asciz "char" # string offset=57 .Linfo_string11: .asciz "clang version 15.0.0" # string offset=62 .Linfo_string12: .asciz "main.cpp" # string offset=83 .Linfo_string13: .asciz "main.dwo" # string offset=92 .section .debug_str_offsets.dwo,"e",@progbits .long 0 .long 2 .long 6 .long 8 .long 19 .long 23 .long 35 .long 42 .long 47 .long 52 .long 57 .long 62 .long 83 .long 92 .section .debug_info.dwo,"e",@progbits .long .Ldebug_info_dwo_end0-.Ldebug_info_dwo_start0 # Length of Unit .Ldebug_info_dwo_start0: .short 4 # DWARF version number .long 0 # Offset Into Abbrev. Section .byte 8 # Address Size (in bytes) .byte 1 # Abbrev [1] 0xb:0xbd DW_TAG_compile_unit .byte 11 # DW_AT_producer .short 33 # DW_AT_language .byte 12 # DW_AT_name .byte 13 # DW_AT_GNU_dwo_name .quad -4922924650784735988 # DW_AT_GNU_dwo_id .byte 2 # Abbrev [2] 0x19:0xb DW_TAG_variable .byte 0 # DW_AT_name .long 36 # DW_AT_type # DW_AT_external .byte 1 # DW_AT_decl_file .byte 7 # DW_AT_decl_line .byte 2 # DW_AT_location .byte 251 .byte 0 .byte 3 # Abbrev [3] 0x24:0x4 DW_TAG_base_type .byte 1 # DW_AT_name .byte 5 # DW_AT_encoding .byte 4 # DW_AT_byte_size .byte 2 # Abbrev [2] 0x28:0xb DW_TAG_variable .byte 2 # DW_AT_name .long 36 # DW_AT_type # DW_AT_external .byte 1 # DW_AT_decl_file .byte 8 # DW_AT_decl_line .byte 2 # DW_AT_location .byte 251 .byte 1 .byte 4 # Abbrev [4] 0x33:0x1b DW_TAG_subprogram .byte 2 # DW_AT_low_pc .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc .byte 1 # DW_AT_frame_base .byte 87 # DW_AT_GNU_all_call_sites .long 78 # DW_AT_abstract_origin .byte 5 # Abbrev [5] 0x3f:0x7 DW_TAG_formal_parameter .byte 1 # DW_AT_location .byte 85 .long 84 # DW_AT_abstract_origin .byte 5 # Abbrev [5] 0x46:0x7 DW_TAG_formal_parameter .byte 1 # DW_AT_location .byte 84 .long 92 # DW_AT_abstract_origin .byte 0 # End Of Children Mark .byte 6 # Abbrev [6] 0x4e:0x17 DW_TAG_subprogram .byte 3 # DW_AT_linkage_name .byte 4 # DW_AT_name .byte 1 # DW_AT_decl_file .byte 1 # DW_AT_decl_line # DW_AT_external .byte 1 # DW_AT_inline .byte 7 # Abbrev [7] 0x54:0x8 DW_TAG_formal_parameter .byte 0 # DW_AT_name .byte 1 # DW_AT_decl_file .byte 1 # DW_AT_decl_line .long 101 # DW_AT_type .byte 7 # Abbrev [7] 0x5c:0x8 DW_TAG_formal_parameter .byte 2 # DW_AT_name .byte 1 # DW_AT_decl_file .byte 1 # DW_AT_decl_line .long 101 # DW_AT_type .byte 0 # End Of Children Mark .byte 8 # Abbrev [8] 0x65:0x5 DW_TAG_pointer_type .long 36 # DW_AT_type .byte 9 # Abbrev [9] 0x6a:0x3b DW_TAG_subprogram .byte 3 # DW_AT_low_pc .long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc .byte 1 # DW_AT_frame_base .byte 87 # DW_AT_GNU_all_call_sites .byte 7 # DW_AT_name .byte 1 # DW_AT_decl_file .byte 9 # DW_AT_decl_line .long 36 # DW_AT_type # DW_AT_external .byte 10 # Abbrev [10] 0x79:0xc DW_TAG_formal_parameter .long .Ldebug_loc0-.debug_loc.dwo # DW_AT_location .byte 8 # DW_AT_name .byte 1 # DW_AT_decl_file .byte 9 # DW_AT_decl_line .long 36 # DW_AT_type .byte 10 # Abbrev [10] 0x85:0xc DW_TAG_formal_parameter .long .Ldebug_loc1-.debug_loc.dwo # DW_AT_location .byte 9 # DW_AT_name .byte 1 # DW_AT_decl_file .byte 9 # DW_AT_decl_line .long 185 # DW_AT_type .byte 11 # Abbrev [11] 0x91:0xd DW_TAG_inlined_subroutine .long 78 # DW_AT_abstract_origin .byte 3 # DW_AT_low_pc .long .Ltmp3-.Lfunc_begin1 # DW_AT_high_pc .byte 1 # DW_AT_call_file .byte 12 # DW_AT_call_line .byte 4 # DW_AT_call_column .byte 12 # Abbrev [12] 0x9e:0x6 DW_TAG_GNU_call_site .long 165 # DW_AT_abstract_origin # DW_AT_GNU_tail_call .byte 4 # DW_AT_low_pc .byte 0 # End Of Children Mark .byte 13 # Abbrev [13] 0xa5:0x14 DW_TAG_subprogram .byte 5 # DW_AT_linkage_name .byte 6 # DW_AT_name .byte 1 # DW_AT_decl_file .byte 6 # DW_AT_decl_line .long 36 # DW_AT_type # DW_AT_declaration # DW_AT_external .byte 14 # Abbrev [14] 0xae:0x5 DW_TAG_formal_parameter .long 36 # DW_AT_type .byte 14 # Abbrev [14] 0xb3:0x5 DW_TAG_formal_parameter .long 36 # DW_AT_type .byte 0 # End Of Children Mark .byte 8 # Abbrev [8] 0xb9:0x5 DW_TAG_pointer_type .long 190 # DW_AT_type .byte 8 # Abbrev [8] 0xbe:0x5 DW_TAG_pointer_type .long 195 # DW_AT_type .byte 3 # Abbrev [3] 0xc3:0x4 DW_TAG_base_type .byte 10 # DW_AT_name .byte 6 # DW_AT_encoding .byte 1 # DW_AT_byte_size .byte 0 # End Of Children Mark .Ldebug_info_dwo_end0: .section .debug_abbrev.dwo,"e",@progbits .byte 1 # Abbreviation Code .byte 17 # DW_TAG_compile_unit .byte 1 # DW_CHILDREN_yes .byte 37 # DW_AT_producer .ascii "\202>" # DW_FORM_GNU_str_index .byte 19 # DW_AT_language .byte 5 # DW_FORM_data2 .byte 3 # DW_AT_name .ascii "\202>" # DW_FORM_GNU_str_index .ascii "\260B" # DW_AT_GNU_dwo_name .ascii "\202>" # DW_FORM_GNU_str_index .ascii "\261B" # DW_AT_GNU_dwo_id .byte 7 # DW_FORM_data8 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 2 # Abbreviation Code .byte 52 # DW_TAG_variable .byte 0 # DW_CHILDREN_no .byte 3 # DW_AT_name .ascii "\202>" # DW_FORM_GNU_str_index .byte 73 # DW_AT_type .byte 19 # DW_FORM_ref4 .byte 63 # DW_AT_external .byte 25 # DW_FORM_flag_present .byte 58 # DW_AT_decl_file .byte 11 # DW_FORM_data1 .byte 59 # DW_AT_decl_line .byte 11 # DW_FORM_data1 .byte 2 # DW_AT_location .byte 24 # DW_FORM_exprloc .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 3 # Abbreviation Code .byte 36 # DW_TAG_base_type .byte 0 # DW_CHILDREN_no .byte 3 # DW_AT_name .ascii "\202>" # DW_FORM_GNU_str_index .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 4 # Abbreviation Code .byte 46 # DW_TAG_subprogram .byte 1 # DW_CHILDREN_yes .byte 17 # DW_AT_low_pc .ascii "\201>" # DW_FORM_GNU_addr_index .byte 18 # DW_AT_high_pc .byte 6 # DW_FORM_data4 .byte 64 # DW_AT_frame_base .byte 24 # DW_FORM_exprloc .ascii "\227B" # DW_AT_GNU_all_call_sites .byte 25 # DW_FORM_flag_present .byte 49 # DW_AT_abstract_origin .byte 19 # DW_FORM_ref4 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 5 # 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 6 # Abbreviation Code .byte 46 # DW_TAG_subprogram .byte 1 # DW_CHILDREN_yes .byte 110 # DW_AT_linkage_name .ascii "\202>" # DW_FORM_GNU_str_index .byte 3 # DW_AT_name .ascii "\202>" # DW_FORM_GNU_str_index .byte 58 # DW_AT_decl_file .byte 11 # DW_FORM_data1 .byte 59 # DW_AT_decl_line .byte 11 # DW_FORM_data1 .byte 63 # DW_AT_external .byte 25 # DW_FORM_flag_present .byte 32 # DW_AT_inline .byte 11 # DW_FORM_data1 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 7 # Abbreviation Code .byte 5 # DW_TAG_formal_parameter .byte 0 # DW_CHILDREN_no .byte 3 # DW_AT_name .ascii "\202>" # DW_FORM_GNU_str_index .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 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 9 # Abbreviation Code .byte 46 # DW_TAG_subprogram .byte 1 # DW_CHILDREN_yes .byte 17 # DW_AT_low_pc .ascii "\201>" # DW_FORM_GNU_addr_index .byte 18 # DW_AT_high_pc .byte 6 # DW_FORM_data4 .byte 64 # DW_AT_frame_base .byte 24 # DW_FORM_exprloc .ascii "\227B" # DW_AT_GNU_all_call_sites .byte 25 # DW_FORM_flag_present .byte 3 # DW_AT_name .ascii "\202>" # DW_FORM_GNU_str_index .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 10 # Abbreviation Code .byte 5 # DW_TAG_formal_parameter .byte 0 # DW_CHILDREN_no .byte 2 # DW_AT_location .byte 23 # DW_FORM_sec_offset .byte 3 # DW_AT_name .ascii "\202>" # DW_FORM_GNU_str_index .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 11 # Abbreviation Code .byte 29 # DW_TAG_inlined_subroutine .byte 0 # DW_CHILDREN_no .byte 49 # DW_AT_abstract_origin .byte 19 # DW_FORM_ref4 .byte 17 # DW_AT_low_pc .ascii "\201>" # DW_FORM_GNU_addr_index .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 12 # Abbreviation Code .ascii "\211\202\001" # DW_TAG_GNU_call_site .byte 0 # DW_CHILDREN_no .byte 49 # DW_AT_abstract_origin .byte 19 # DW_FORM_ref4 .ascii "\225B" # DW_AT_GNU_tail_call .byte 25 # DW_FORM_flag_present .byte 17 # DW_AT_low_pc .ascii "\201>" # DW_FORM_GNU_addr_index .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 13 # Abbreviation Code .byte 46 # DW_TAG_subprogram .byte 1 # DW_CHILDREN_yes .byte 110 # DW_AT_linkage_name .ascii "\202>" # DW_FORM_GNU_str_index .byte 3 # DW_AT_name .ascii "\202>" # DW_FORM_GNU_str_index .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 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 14 # Abbreviation Code .byte 5 # DW_TAG_formal_parameter .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_addr,"",@progbits .Laddr_table_base0: .quad x .quad y .quad .Lfunc_begin0 .quad .Lfunc_begin1 .quad .Ltmp5 .quad .Ltmp4 .quad .Ltmp2 .ident "clang version 15.0.0" .section ".note.GNU-stack","",@progbits .section .debug_line,"",@progbits .Lline_table_start0: