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# Source (tiny.cc):
# void a() {}
# void b() {}
# int main(int argc, char** argv) {
# void(*ptr)();
# if (argc == 1)
# ptr = &a;
# else
# ptr = &b;
# ptr();
# }
# Compile with:
# clang++ -gmlt tiny.cc -S -o tiny.s
.text
.file "tiny.cc"
.globl _Z1av # -- Begin function _Z1av
.p2align 4, 0x90
.type _Z1av,@function
_Z1av: # @_Z1av
.Lfunc_begin0:
.file 1 "tiny.cc"
.loc 1 1 0 # tiny.cc:1:0
.cfi_startproc
# BB#0:
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset %rbp, -16
movq %rsp, %rbp
.cfi_def_cfa_register %rbp
.Ltmp0:
.loc 1 1 11 prologue_end # tiny.cc:1:11
popq %rbp
retq
.Ltmp1:
.Lfunc_end0:
.size _Z1av, .Lfunc_end0-_Z1av
.cfi_endproc
# -- End function
.globl _Z1bv # -- Begin function _Z1bv
.p2align 4, 0x90
.type _Z1bv,@function
_Z1bv: # @_Z1bv
.Lfunc_begin1:
.loc 1 2 0 # tiny.cc:2:0
.cfi_startproc
# BB#0:
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset %rbp, -16
movq %rsp, %rbp
.cfi_def_cfa_register %rbp
.Ltmp2:
.loc 1 2 11 prologue_end # tiny.cc:2:11
popq %rbp
retq
.Ltmp3:
.Lfunc_end1:
.size _Z1bv, .Lfunc_end1-_Z1bv
.cfi_endproc
# -- End function
.globl main # -- Begin function main
.p2align 4, 0x90
.type main,@function
main: # @main
.Lfunc_begin2:
.loc 1 4 0 # tiny.cc:4:0
.cfi_startproc
# BB#0:
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset %rbp, -16
movq %rsp, %rbp
.cfi_def_cfa_register %rbp
subq $32, %rsp
movl $0, -4(%rbp)
movl %edi, -8(%rbp)
movq %rsi, -16(%rbp)
.Ltmp4:
.loc 1 6 12 prologue_end # tiny.cc:6:12
cmpl $1, -8(%rbp)
.loc 1 6 7 is_stmt 0 # tiny.cc:6:7
jne .LBB2_2
# BB#1:
.loc 1 0 7 # tiny.cc:0:7
movabsq $_Z1av, %rax
.loc 1 7 9 is_stmt 1 # tiny.cc:7:9
movq %rax, -24(%rbp)
.loc 1 7 5 is_stmt 0 # tiny.cc:7:5
jmp .LBB2_3
.LBB2_2:
.loc 1 0 5 # tiny.cc:0:5
movabsq $_Z1bv, %rax
.loc 1 9 9 is_stmt 1 # tiny.cc:9:9
movq %rax, -24(%rbp)
.LBB2_3:
.loc 1 11 3 # tiny.cc:11:3
callq *-24(%rbp)
.loc 1 12 1 # tiny.cc:12:1
movl -4(%rbp), %eax
addq $32, %rsp
popq %rbp
retq
.Ltmp5:
.Lfunc_end2:
.size main, .Lfunc_end2-main
.cfi_endproc
# -- End function
.section .debug_str,"MS",@progbits,1
.Linfo_string0:
.asciz "clang version 6.0.0 (trunk 316774)" # string offset=0
.Linfo_string1:
.asciz "tiny.cc" # string offset=35
.Linfo_string2:
.asciz "/tmp/a/b" # string offset=43
.section .debug_abbrev,"",@progbits
.byte 1 # Abbreviation Code
.byte 17 # DW_TAG_compile_unit
.byte 0 # DW_CHILDREN_no
.byte 37 # DW_AT_producer
.byte 14 # DW_FORM_strp
.byte 19 # DW_AT_language
.byte 5 # DW_FORM_data2
.byte 3 # DW_AT_name
.byte 14 # DW_FORM_strp
.byte 16 # DW_AT_stmt_list
.byte 23 # DW_FORM_sec_offset
.byte 27 # DW_AT_comp_dir
.byte 14 # DW_FORM_strp
.byte 17 # DW_AT_low_pc
.byte 1 # DW_FORM_addr
.byte 18 # DW_AT_high_pc
.byte 6 # DW_FORM_data4
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 0 # EOM(3)
.section .debug_info,"",@progbits
.Lcu_begin0:
.long 38 # Length of Unit
.short 4 # DWARF version number
.long .debug_abbrev # Offset Into Abbrev. Section
.byte 8 # Address Size (in bytes)
.byte 1 # Abbrev [1] 0xb:0x1f DW_TAG_compile_unit
.long .Linfo_string0 # DW_AT_producer
.short 4 # DW_AT_language
.long .Linfo_string1 # DW_AT_name
.long .Lline_table_start0 # DW_AT_stmt_list
.long .Linfo_string2 # DW_AT_comp_dir
.quad .Lfunc_begin0 # DW_AT_low_pc
.long .Lfunc_end2-.Lfunc_begin0 # DW_AT_high_pc
.section .debug_ranges,"",@progbits
.section .debug_macinfo,"",@progbits
.Lcu_macro_begin0:
.byte 0 # End Of Macro List Mark
.ident "clang version 6.0.0 (trunk 316774)"
.section ".note.GNU-stack","",@progbits
.section .debug_line,"",@progbits
.Lline_table_start0:
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