LDC lto generate wrong dll export table

[Test123]

On Sunday, 22 May 2022 at 17:06:46 UTC, Test123 wrote:
> The problem is when link with LDC generate lto object, there is 
> no export table name.

to viery this please download 
https://github.com/mstorsjo/llvm-mingw/releases/download/20220323/llvm-mingw-20220323-msvcrt-ubuntu-18.04-x86_64.tar.xz into linux(there is also macOS and Windows version).

test with clang:

```sh
./mingw/bin/x86_64-w64-mingw32-clang -flto=full ./test.c -c
./mingw/bin/lld -flavor ld -lmingwex -lmingw32 -lmsvcrt 
-lkernel32 -m i386pep --shared -Bdynamic test.o -o test.dll -e 
DllMainCRTStartup --enable-auto-image-base  
mingw/x86_64-w64-mingw32/lib/dllcrt2.o 
mingw/x86_64-w64-mingw32/lib/crtbegin.o 
-Lmingw/x86_64-w64-mingw32/lib -Lmingw/lib 
-Lmingw/x86_64-w64-mingw32/sys-root/mingw/lib 
-Lmingw/lib/clang/14.0.0/lib/windows /dll 
mingw/lib/clang/14.0.0/lib/windows/libclang_rt.builtins-x86_64.a 
mingw/x86_64-w64-mingw32/lib/crtend.o -Bdynamic
./mingw/bin/x86_64-w64-mingw32-objdump --private-headers  
./test.dll
```


And you will see this at the end:

```sh
Export Table:
  DLL name: test.dll
  Ordinal base: 0
  Ordinal      RVA  Name
        0        0
        1   0x2350  test
```


verify with ldc
```sh
ldmd2 -mtriple=x86_64-w64-mingw32 -betterC -flto=full -c ./test.d
./mingw/bin/lld -flavor ld -lmingwex -lmingw32 -lmsvcrt 
-lkernel32 -m i386pep --shared -Bdynamic test.o -o test.dll -e 
DllMainCRTStartup --enable-auto-image-base  
mingw/x86_64-w64-mingw32/lib/dllcrt2.o 
mingw/x86_64-w64-mingw32/lib/crtbegin.o 
-Lmingw/x86_64-w64-mingw32/lib -Lmingw/lib 
-Lmingw/x86_64-w64-mingw32/sys-root/mingw/lib 
-Lmingw/lib/clang/14.0.0/lib/windows /dll 
mingw/lib/clang/14.0.0/lib/windows/libclang_rt.builtins-x86_64.a 
mingw/x86_64-w64-mingw32/lib/crtend.o -Bdynamic
./mingw/bin/x86_64-w64-mingw32-objdump --private-headers  
./test.dll
```

you will this this at the end:

```sh
Export Table:
  DLL name: test.dll
  Ordinal base: 0
  Ordinal      RVA  Name
        0        0
        1   0x2340
        2   0x2330  t
```

The name for ldc2 wll be random(some time empty).


Use ldc2 without LTO always give the same result like clang.