| /* Original C (for context): | |
| * // Declare a real external call so the compiler must respect ABI clobbers. | |
| * extern int leaf(int) __attribute__((noinline)); | |
| * | |
| * __attribute__((noinline)) | |
| * int live_across_call(int x) { | |
| * volatile int a = x; // a starts in a GPR (from arg) | |
| * asm volatile("" :: "r"(a)); // keep 'a' live in a register | |
| * int r = leaf(a); // 'a' is live across the call | |
| * asm volatile("" :: "r"(a), "r"(r));// still live afterwards | |
| * return a + r; | |
| * } | |
| */ | |
| .file "live_across_call.c" | |
| .att_syntax | |
| .text | |
| .globl live_across_call # -- Begin function live_across_call | |
| .p2align 4 | |
| .type live_across_call,@function | |
| live_across_call: # @live_across_call | |
| .Lfunc_begin0: | |
| .file 0 "." "live_across_call.c" md5 0x351c37295026edf0d468774d35f47e5e | |
| .loc 0 5 0 # live_across_call.c:5:0 | |
| .cfi_startproc | |
| # %bb.0: # %entry | |
| #DEBUG_VALUE: live_across_call:x <- $edi | |
| pushq %rbp | |
| .cfi_def_cfa_offset 16 | |
| .cfi_offset %rbp, -16 | |
| movq %rsp, %rbp | |
| .cfi_def_cfa_register %rbp | |
| subq $16, %rsp | |
| .Ltmp0: | |
| .loc 0 6 16 prologue_end # live_across_call.c:6:16 | |
| movl %edi, -4(%rbp) | |
| .loc 0 7 26 # live_across_call.c:7:26 | |
| movl -4(%rbp), %eax | |
| .loc 0 7 3 is_stmt 0 # live_across_call.c:7:3 | |
| #APP | |
| #NO_APP | |
| .loc 0 8 16 is_stmt 1 # live_across_call.c:8:16 | |
| movl -4(%rbp), %edi | |
| .Ltmp1: | |
| #DEBUG_VALUE: live_across_call:x <- [DW_OP_LLVM_entry_value 1] $edi | |
| .loc 0 8 11 is_stmt 0 # live_across_call.c:8:11 | |
| callq leaf@PLT | |
| .Ltmp2: | |
| #DEBUG_VALUE: live_across_call:r <- $eax | |
| .loc 0 9 26 is_stmt 1 # live_across_call.c:9:26 | |
| movl -4(%rbp), %ecx | |
| .loc 0 9 3 is_stmt 0 # live_across_call.c:9:3 | |
| #APP | |
| #NO_APP | |
| .loc 0 10 12 is_stmt 1 # live_across_call.c:10:12 | |
| addl -4(%rbp), %eax | |
| .Ltmp3: | |
| .loc 0 10 3 epilogue_begin is_stmt 0 # live_across_call.c:10:3 | |
| addq $16, %rsp | |
| popq %rbp | |
| .cfi_def_cfa %rsp, 8 | |
| retq | |
| .Ltmp4: | |
| .Lfunc_end0: | |
| .size live_across_call, .Lfunc_end0-live_across_call | |
| .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 2 # Offset entry count | |
| .Lloclists_table_base0: | |
| .long .Ldebug_loc0-.Lloclists_table_base0 | |
| .long .Ldebug_loc1-.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 .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 .Ltmp2-.Lfunc_begin0 # starting offset | |
| .uleb128 .Ltmp3-.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 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 39 # DW_AT_prototyped | |
| .byte 25 # DW_FORM_flag_present | |
| .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 3 # 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 4 # Abbreviation Code | |
| .byte 52 # DW_TAG_variable | |
| .byte 0 # DW_CHILDREN_no | |
| .byte 2 # DW_AT_location | |
| .byte 24 # DW_FORM_exprloc | |
| .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 5 # 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 6 # 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 7 # Abbreviation Code | |
| .byte 46 # DW_TAG_subprogram | |
| .byte 1 # DW_CHILDREN_yes | |
| .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 39 # DW_AT_prototyped | |
| .byte 25 # DW_FORM_flag_present | |
| .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 8 # 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 9 # 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 10 # Abbreviation Code | |
| .byte 53 # DW_TAG_volatile_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:0x66 DW_TAG_compile_unit | |
| .byte 0 # DW_AT_producer | |
| .short 29 # 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] 0x27:0x33 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 86 | |
| # DW_AT_call_all_calls | |
| .byte 5 # DW_AT_name | |
| .byte 0 # DW_AT_decl_file | |
| .byte 5 # DW_AT_decl_line | |
| # DW_AT_prototyped | |
| .long 104 # DW_AT_type | |
| # DW_AT_external | |
| .byte 3 # Abbrev [3] 0x36:0x9 DW_TAG_formal_parameter | |
| .byte 0 # DW_AT_location | |
| .byte 7 # DW_AT_name | |
| .byte 0 # DW_AT_decl_file | |
| .byte 5 # DW_AT_decl_line | |
| .long 104 # DW_AT_type | |
| .byte 4 # Abbrev [4] 0x3f:0xb DW_TAG_variable | |
| .byte 2 # DW_AT_location | |
| .byte 145 | |
| .byte 124 | |
| .byte 6 # DW_AT_name | |
| .byte 0 # DW_AT_decl_file | |
| .byte 6 # DW_AT_decl_line | |
| .long 108 # DW_AT_type | |
| .byte 5 # Abbrev [5] 0x4a:0x9 DW_TAG_variable | |
| .byte 1 # DW_AT_location | |
| .byte 8 # DW_AT_name | |
| .byte 0 # DW_AT_decl_file | |
| .byte 8 # DW_AT_decl_line | |
| .long 104 # DW_AT_type | |
| .byte 6 # Abbrev [6] 0x53:0x6 DW_TAG_call_site | |
| .long 90 # DW_AT_call_origin | |
| .byte 1 # DW_AT_call_return_pc | |
| .byte 0 # End Of Children Mark | |
| .byte 7 # Abbrev [7] 0x5a:0xe DW_TAG_subprogram | |
| .byte 3 # DW_AT_name | |
| .byte 0 # DW_AT_decl_file | |
| .byte 2 # DW_AT_decl_line | |
| # DW_AT_prototyped | |
| .long 104 # DW_AT_type | |
| # DW_AT_declaration | |
| # DW_AT_external | |
| .byte 8 # Abbrev [8] 0x62:0x5 DW_TAG_formal_parameter | |
| .long 104 # DW_AT_type | |
| .byte 0 # End Of Children Mark | |
| .byte 9 # Abbrev [9] 0x68:0x4 DW_TAG_base_type | |
| .byte 4 # DW_AT_name | |
| .byte 5 # DW_AT_encoding | |
| .byte 4 # DW_AT_byte_size | |
| .byte 10 # Abbrev [10] 0x6c:0x5 DW_TAG_volatile_type | |
| .long 104 # DW_AT_type | |
| .byte 0 # End Of Children Mark | |
| .Ldebug_info_end0: | |
| .section .debug_str_offsets,"",@progbits | |
| .long 40 # Length of String Offsets Set | |
| .short 5 | |
| .short 0 | |
| .Lstr_offsets_base0: | |
| .section .debug_str,"MS",@progbits,1 | |
| .Linfo_string0: | |
| .asciz "clang version 22.0.0git (https://github.com/UltimateForce21/llvm-project.git 79c0a9e1e7da0f727c41d27c9c6ff8a28bb7d06f)" # string offset=0 | |
| .Linfo_string1: | |
| .asciz "live_across_call.c" # string offset=119 | |
| .Linfo_string2: | |
| .asciz "." # string offset=138 | |
| .Linfo_string3: | |
| .asciz "leaf" # string offset=140 | |
| .Linfo_string4: | |
| .asciz "int" # string offset=145 | |
| .Linfo_string5: | |
| .asciz "live_across_call" # string offset=149 | |
| .Linfo_string6: | |
| .asciz "a" # string offset=166 | |
| .Linfo_string7: | |
| .asciz "x" # string offset=168 | |
| .Linfo_string8: | |
| .asciz "r" # string offset=170 | |
| .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 | |
| .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: | |
| .ident "clang version 22.0.0git (https://github.com/UltimateForce21/llvm-project.git 79c0a9e1e7da0f727c41d27c9c6ff8a28bb7d06f)" | |
| .section ".note.GNU-stack","",@progbits | |
| .addrsig | |
| .section .debug_line,"",@progbits | |
| .Lline_table_start0: |