https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116333
--- Comment #2 from Pali Rohár <pali at kernel dot org> ---
Hello Andrew, you have wrote that this function is not optimized out because of
inlining. I tried to mark _winshowcmd() function with __attribute__((noinline))
but result is similar. Function _winshowcmd() is present in the final
executable but it is not called at all.
It is really a duplicate?
$ objdump -d pure.exe
pure.exe: file format pei-i386
Disassembly of section .text:
00401000 <__winshowcmd>:
401000: 55 push %ebp
401001: 31 c0 xor %eax,%eax
401003: b9 11 00 00 00 mov $0x11,%ecx
401008: 89 e5 mov %esp,%ebp
40100a: 57 push %edi
40100b: 8d 7d b4 lea -0x4c(%ebp),%edi
40100e: 83 ec 64 sub $0x64,%esp
401011: f3 ab rep stos %eax,%es:(%edi)
401013: 8d 45 b4 lea -0x4c(%ebp),%eax
401016: 89 04 24 mov %eax,(%esp)
401019: ff 15 4c 30 40 00 call *0x40304c
40101f: 50 push %eax
401020: b8 0a 00 00 00 mov $0xa,%eax
401025: f6 45 e0 01 testb $0x1,-0x20(%ebp)
401029: 74 04 je 40102f <__winshowcmd+0x2f>
40102b: 0f b7 45 e4 movzwl -0x1c(%ebp),%eax
40102f: 8b 7d fc mov -0x4(%ebp),%edi
401032: c9 leave
401033: c3 ret
00401034 <___main>:
401034: c3 ret
00401035 <_WinMainCRTStartup>:
401035: 55 push %ebp
401036: b8 01 00 00 00 mov $0x1,%eax
40103b: 89 e5 mov %esp,%ebp
40103d: 83 ec 18 sub $0x18,%esp
401040: 8d 55 f0 lea -0x10(%ebp),%edx
401043: c7 45 f0 0e 20 40 00 movl $0x40200e,-0x10(%ebp)
40104a: c7 45 f4 00 00 00 00 movl $0x0,-0xc(%ebp)
401051: e8 12 00 00 00 call 401068 <_main>
401056: c9 leave
401057: c3 ret
00401058 <_GetStartupInfoA@4>:
401058: ff 25 4c 30 40 00 jmp *0x40304c
40105e: 90 nop
40105f: 90 nop
00401060 <_MessageBoxA@16>:
401060: ff 25 54 30 40 00 jmp *0x403054
401066: 90 nop
401067: 90 nop
00401068 <_main>:
401068: 57 push %edi
401069: 8d 7c 24 08 lea 0x8(%esp),%edi
40106d: 83 e4 f0 and $0xfffffff0,%esp
401070: ff 77 fc pushl -0x4(%edi)
401073: 55 push %ebp
401074: 89 e5 mov %esp,%ebp
401076: 57 push %edi
401077: 83 ec 14 sub $0x14,%esp
40107a: e8 b5 ff ff ff call 401034 <___main>
40107f: c7 44 24 0c 00 00 00 movl $0x0,0xc(%esp)
401086: 00
401087: c7 44 24 08 00 20 40 movl $0x402000,0x8(%esp)
40108e: 00
40108f: c7 44 24 04 06 20 40 movl $0x402006,0x4(%esp)
401096: 00
401097: c7 04 24 00 00 00 00 movl $0x0,(%esp)
40109e: ff 15 54 30 40 00 call *0x403054
4010a4: 8b 7d fc mov -0x4(%ebp),%edi
4010a7: 31 c0 xor %eax,%eax
4010a9: 83 ec 10 sub $0x10,%esp
4010ac: c9 leave
4010ad: 8d 67 f8 lea -0x8(%edi),%esp
4010b0: 5f pop %edi
4010b1: c3 ret
4010b2: 90 nop
4010b3: 90 nop
004010b4 <__CTOR_LIST__>:
4010b4: ff (bad)
4010b5: ff (bad)
4010b6: ff (bad)
4010b7: ff 00 incl (%eax)
4010b9: 00 00 add %al,(%eax)
...
004010bc <__DTOR_LIST__>:
4010bc: ff (bad)
4010bd: ff (bad)
4010be: ff (bad)
4010bf: ff 00 incl (%eax)
4010c1: 00 00 add %al,(%eax)
...
