mmap.demo1 Clang codegen

gistfile1.txt

btest`main:
    0x100000c00 <+0>:   pushq  %rbp
    0x100000c01 <+1>:   movq   %rsp, %rbp
    0x100000c04 <+4>:   pushq  %r15
    0x100000c06 <+6>:   pushq  %r14
    0x100000c08 <+8>:   pushq  %r13
    0x100000c0a <+10>:  pushq  %r12
    0x100000c0c <+12>:  pushq  %rbx
    0x100000c0d <+13>:  subq   $0x98, %rsp
    0x100000c14 <+20>:  leaq   0x28b(%rip), %rdi         ; "foo"
    0x100000c1b <+27>:  xorl   %esi, %esi
    0x100000c1d <+29>:  movl   $0xffff, %edx
    0x100000c22 <+34>:  xorl   %eax, %eax
    0x100000c24 <+36>:  callq  0x100000e2a               ; symbol stub for: open
    0x100000c29 <+41>:  movl   %eax, %r15d
    0x100000c2c <+44>:  cmpl   $-0x1, %r15d
    0x100000c30 <+48>:  je     0x100000cfa               ; <+250> [inlined] boost::err::last_errno::get() at errno.hpp:76
    0x100000c36 <+54>:  leaq   -0xb8(%rbp), %rsi
    0x100000c3d <+61>:  movl   %r15d, %edi
    0x100000c40 <+64>:  callq  0x100000e18               ; symbol stub for: fstat$INODE64
    0x100000c45 <+69>:  testl  %eax, %eax
    0x100000c47 <+71>:  jne    0x100000d19               ; <+281> [inlined] boost::err::last_errno::get() at errno.hpp:76
    0x100000c4d <+77>:  movq   -0x58(%rbp), %rbx
    0x100000c51 <+81>:  xorl   %r14d, %r14d
    0x100000c54 <+84>:  xorl   %edi, %edi
    0x100000c56 <+86>:  movl   $0x1, %edx
    0x100000c5b <+91>:  movl   $0x1, %ecx
    0x100000c60 <+96>:  xorl   %r9d, %r9d
    0x100000c63 <+99>:  movq   %rbx, %rsi
    0x100000c66 <+102>: movl   %r15d, %r8d
    0x100000c69 <+105>: callq  0x100000e1e               ; symbol stub for: mmap
    0x100000c6e <+110>: cmpq   $-0x1, %rax
    0x100000c72 <+114>: movl   $0x0, %r12d
    0x100000c78 <+120>: je     0x100000c83               ; <+131> [inlined] boost::mmap::basic_mapped_view<char const, boost::mmap::posix::mapper>::map(boost::mmap::posix::mapping const&, boost::mmap::posix::flags::viewing, unsigned long long, unsigned long) + 32 at mapped_view.hpp:160
    0x100000c7a <+122>: addq   %rax, %rbx
    0x100000c7d <+125>: movq   %rbx, %r14
    0x100000c80 <+128>: movq   %rax, %r12
    0x100000c83 <+131>: leaq   -0xc0(%rbp), %r13
    0x100000c8a <+138>: movb   $0x1, -0xc0(%rbp)
    0x100000c91 <+145>: movb   $0x0, -0xbf(%rbp)
    0x100000c98 <+152>: movabsq $-0x100000000, %rbx
    0x100000ca2 <+162>: andq   %r12, %rbx
    0x100000ca5 <+165>: movl   %r15d, %edi
    0x100000ca8 <+168>: callq  0x100000e0c               ; symbol stub for: close
    0x100000cad <+173>: movb   $0x1, -0xbf(%rbp)
    0x100000cb4 <+180>: movzwl (%r13), %eax
    0x100000cb9 <+185>: testb  %al, %al
    0x100000cbb <+187>: je     0x100000ce5               ; <+229> at ConsoleApplication1.cpp:220
    0x100000cbd <+189>: movl   %r12d, %eax
    0x100000cc0 <+192>: orq    %rax, %rbx
    0x100000cc3 <+195>: movl   $0xffffffff, %r12d
    0x100000cc9 <+201>: cmpq   %r14, %rbx
    0x100000ccc <+204>: je     0x100000cd2               ; <+210> [inlined] boost::mmap::posix::mapper::unmap(void const*, unsigned long) at mapped_view.inl:102
    0x100000cce <+206>: movsbl (%rbx), %r12d
    0x100000cd2 <+210>: testq  %rbx, %rbx
    0x100000cd5 <+213>: je     0x100000ce5               ; <+229> at ConsoleApplication1.cpp:220
    0x100000cd7 <+215>: subq   %rbx, %r14
    0x100000cda <+218>: movq   %rbx, %rdi
    0x100000cdd <+221>: movq   %r14, %rsi
    0x100000ce0 <+224>: callq  0x100000e24               ; symbol stub for: munmap
    0x100000ce5 <+229>: movl   %r12d, %eax
    0x100000ce8 <+232>: addq   $0x98, %rsp
    0x100000cef <+239>: popq   %rbx
    0x100000cf0 <+240>: popq   %r12
    0x100000cf2 <+242>: popq   %r13
    0x100000cf4 <+244>: popq   %r14
    0x100000cf6 <+246>: popq   %r15
    0x100000cf8 <+248>: popq   %rbp
    0x100000cf9 <+249>: retq   
    0x100000cfa <+250>: callq  0x100000e06               ; symbol stub for: __error
    0x100000cff <+255>: movl   (%rax), %r12d
    0x100000d02 <+258>: leaq   -0xc0(%rbp), %r13
    0x100000d09 <+265>: movb   $0x0, -0xc0(%rbp)
    0x100000d10 <+272>: movb   $0x0, -0xbf(%rbp)
    0x100000d17 <+279>: jmp    0x100000d3e               ; <+318> at handle.hpp:77
    0x100000d19 <+281>: callq  0x100000e06               ; symbol stub for: __error
    0x100000d1e <+286>: movl   (%rax), %r12d
    0x100000d21 <+289>: leaq   -0xc0(%rbp), %r13
    0x100000d28 <+296>: movb   $0x0, -0xc0(%rbp)
    0x100000d2f <+303>: movb   $0x0, -0xbf(%rbp)
    0x100000d36 <+310>: movl   %r15d, %edi
    0x100000d39 <+313>: callq  0x100000e0c               ; symbol stub for: close
    0x100000d3e <+318>: xorl   %ebx, %ebx
    0x100000d40 <+320>: jmp    0x100000cad               ; <+173> [inlined] boost::err::result_or_error<boost::mmap::basic_mapped_view<char const, boost::mmap::posix::mapper>, boost::err::last_errno, void>::succeeded() const at result_or_error.hpp:94