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创建于 差异永不过期
g++ --version
g++ --version
g++ -std=c++11 -O2 -Wall -pedantic -pthread main.cpp -S -masm=intel -o test.asm && cat test.asm | c++filt
g++ -std=c++11 -O2 -Wall -pedantic -pthread main.cpp -S -masm=intel -o test.asm && cat test.asm | c++filt
g++ (GCC) 5.2.0
g++ (GCC) 5.2.0
Copyright (C) 2015 Free Software Foundation, Inc.
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
.file "main.cpp"
.file "main.cpp"
.intel_syntax noprefix
.intel_syntax noprefix
.section .rodata.str1.1,"aMS",@progbits,1
.section .rodata.str1.1,"aMS",@progbits,1
.LC1:
.LC0:
.string "visible effect\n"
.string "visible effect\n"
.section .text.unlikely,"ax",@progbits
.section .text.unlikely,"ax",@progbits
.LCOLDB2:
.LCOLDB1:
.section .text.startup,"ax",@progbits
.section .text.startup,"ax",@progbits
.LHOTB2:
.LHOTB1:
.p2align 4,,15
.p2align 4,,15
.globl main
.globl main
.type main, @function
.type main, @function
main:
main:
.LFB1408:
.LFB1408:
.cfi_startproc
.cfi_startproc
sub rsp, 40
sub rsp, 40
.cfi_def_cfa_offset 48
.cfi_def_cfa_offset 48
mov rax, QWORD PTR std::cin[rip]
mov rax, QWORD PTR std::cin[rip]
mov QWORD PTR [rsp], OFFSET FLAT:std::cin
mov QWORD PTR [rsp], OFFSET FLAT:std::cin
mov rax, QWORD PTR [rax-24]
mov rax, QWORD PTR [rax-24]
test BYTE PTR std::cin[rax+32], 5
test BYTE PTR std::cin[rax+32], 5
je .L2
je .L2
mov BYTE PTR [rsp+16], 0
mov BYTE PTR [rsp+16], 0
.L9:
jmp .L13
cmp BYTE PTR guard variable for main::itend[rip], 0
jne .L10
jmp .L19
.p2align 4,,10
.p2align 4,,10
.p2align 3
.p2align 3
.L7:
.L7:
mov edx, 15
mov edx, 15
mov esi, OFFSET FLAT:.LC1
mov esi, OFFSET FLAT:.LC0
mov edi, OFFSET FLAT:std::cout
mov edi, OFFSET FLAT:std::cout
call std::basic_ostream<char, std::char_traits<char> >& std::__ostream_insert<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*, long)
call std::basic_ostream<char, std::char_traits<char> >& std::__ostream_insert<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*, long)
.L10:
.L13:
movzx eax, BYTE PTR [rsp+16]
cmp BYTE PTR [rsp+16], 0
cmp al, BYTE PTR main::itend[rip+16]
jne .L7
jne .L7
mov rcx, QWORD PTR main::itend[rip]
cmp QWORD PTR [rsp], rcx
sete dl
cmp al, dl
ja .L7
xor eax, eax
xor eax, eax
add rsp, 40
add rsp, 40
.cfi_remember_state
.cfi_remember_state
.cfi_def_cfa_offset 8
.cfi_def_cfa_offset 8
ret
ret
.L2:
.L2:
.cfi_restore_state
.cfi_restore_state
lea rsi, [rsp+8]
lea rsi, [rsp+8]
mov edi, OFFSET FLAT:std::cin
mov edi, OFFSET FLAT:std::cin
mov BYTE PTR [rsp+16], 1
mov BYTE PTR [rsp+16], 1
call std::basic_istream<char, std::char_traits<char> >& std::basic_istream<char, std::char_traits<char> >::_M_extract<double>(double&)
call std::basic_istream<char, std::char_traits<char> >& std::basic_istream<char, std::char_traits<char> >::_M_extract<double>(double&)
mov rax, QWORD PTR [rsp]
mov rax, QWORD PTR [rsp]
mov rdx, QWORD PTR [rax]
mov rdx, QWORD PTR [rax]
mov rdx, QWORD PTR [rdx-24]
mov rdx, QWORD PTR [rdx-24]
test BYTE PTR [rax+32+rdx], 5
test BYTE PTR [rax+32+rdx], 5
sete BYTE PTR [rsp+16]
sete BYTE PTR [rsp+16]
jmp .L9
jmp .L13
.L19:
mov edi, OFFSET FLAT:guard variable for main::itend
call __cxa_guard_acquire
test eax, eax
je .L10
mov edi, OFFSET FLAT:guard variable for main::itend
mov QWORD PTR main::itend[rip], 0
mov QWORD PTR main::itend[rip+8], 0
mov BYTE PTR main::itend[rip+16], 0
call __cxa_guard_release
jmp .L10
.cfi_endproc
.cfi_endproc
.LFE1408:
.LFE1408:
.size main, .-main
.size main, .-main
.section .text.unlikely
.section .text.unlikely
.LCOLDE2:
.LCOLDE1:
.section .text.startup
.section .text.startup
.LHOTE2:
.LHOTE1:
.section .text.unlikely
.section .text.unlikely
.LCOLDB3:
.LCOLDB2:
.section .text.startup
.section .text.startup
.LHOTB3:
.LHOTB2:
.p2align 4,,15
.p2align 4,,15
.type _GLOBAL__sub_I_main, @function
.type _GLOBAL__sub_I_main, @function
_GLOBAL__sub_I_main:
_GLOBAL__sub_I_main:
.LFB1609:
.LFB1609:
.cfi_startproc
.cfi_startproc
sub rsp, 8
sub rsp, 8
.cfi_def_cfa_offset 16
.cfi_def_cfa_offset 16
mov edi, OFFSET FLAT:std::__ioinit
mov edi, OFFSET FLAT:std::__ioinit
call std::ios_base::Init::Init()
call std::ios_base::Init::Init()
mov edx, OFFSET FLAT:__dso_handle
mov edx, OFFSET FLAT:__dso_handle
mov esi, OFFSET FLAT:std::__ioinit
mov esi, OFFSET FLAT:std::__ioinit
mov edi, OFFSET FLAT:std::ios_base::Init::~Init()
mov edi, OFFSET FLAT:std::ios_base::Init::~Init()
add rsp, 8
add rsp, 8
.cfi_def_cfa_offset 8
.cfi_def_cfa_offset 8
jmp __cxa_atexit
jmp __cxa_atexit
.cfi_endproc
.cfi_endproc
.LFE1609:
.LFE1609:
.size _GLOBAL__sub_I_main, .-_GLOBAL__sub_I_main
.size _GLOBAL__sub_I_main, .-_GLOBAL__sub_I_main
.section .text.unlikely
.section .text.unlikely
.LCOLDE3:
.LCOLDE2:
.section .text.startup
.section .text.startup
.LHOTE3:
.LHOTE2:
.section .init_array,"aw"
.section .init_array,"aw"
.align 8
.align 8
.quad _GLOBAL__sub_I_main
.quad _GLOBAL__sub_I_main
.local main::itend
.comm main::itend,24,16
.local guard variable for main::itend
.comm guard variable for main::itend,8,8
.local std::__ioinit
.local std::__ioinit
.comm std::__ioinit,1,1
.comm std::__ioinit,1,1
.hidden __dso_handle
.hidden __dso_handle
.ident "GCC: (GNU) 5.2.0"
.ident "GCC: (GNU) 5.2.0"
.section .note.GNU-stack,"",@progbits
.section .note.GNU-stack,"",@progbits