[PATCH] D51652: lld-link: Write an empty "repro" debug directory entry if /Brepro is passed

[Peter Collingbourne via Phabricator via llvm-commits]

pcc added a comment.

Same result.

  /mnt/c/src/tmp$ cl.exe /Zi /Brepro main.c
  Microsoft (R) C/C++ Optimizing Compiler Version 19.15.26726 for x64
  Copyright (C) Microsoft Corporation.  All rights reserved.
  
  main.c
  Microsoft (R) Incremental Linker Version 14.15.26726.0
  Copyright (C) Microsoft Corporation.  All rights reserved.
  
  /out:main.exe
  /debug
  /Brepro
  main.obj
  /mnt/c/src/tmp$ dumpbin.exe /all main.exe | grep repro
      CD094136 repro         24 000774DC    75CDC    01 77 A3 B7 4A AF D1 37 EB FA 80 9D CA A0 A0 85 13 D5 7D F8 47 FD 31 11 81 74 B5 6B 36 41 09 CD
  /mnt/c/src/tmp$ cat main.c
  int main() {}

Also with separate compilation and linking:

  /mnt/c/src/tmp$ cl.exe /Zi /Brepro empty.cpp /c
  Microsoft (R) C/C++ Optimizing Compiler Version 19.15.26726 for x64
  Copyright (C) Microsoft Corporation.  All rights reserved.
  
  empty.cpp
  /mnt/c/src/tmp$ link.exe /Brepro empty.obj /noentry /dll
  Microsoft (R) Incremental Linker Version 14.15.26726.0
  Copyright (C) Microsoft Corporation.  All rights reserved.
  
  /mnt/c/src/tmp$ dumpbin.exe /all empty.dll | grep repro
      30663452 repro         24 00001064      264    9C 15 A8 DA BA 36 1C DE 3B E0 CE 53 07 D4 02 0A E3 D6 16 41 E5 7E A7 34 E9 17 82 13 52 34 66 30
  /mnt/c/src/tmp$ link.exe /Brepro empty.obj /noentry /dll /debug
  Microsoft (R) Incremental Linker Version 14.15.26726.0
  Copyright (C) Microsoft Corporation.  All rights reserved.
  
  /mnt/c/src/tmp$ dumpbin.exe /all empty.dll | grep repro
      C5E2911E repro         24 000011A8      3A8    AD 6F 0D 48 73 0A 9F 93 1D F7 42 04 88 11 EC 84 88 C7 06 59 BE D2 37 5A 55 B9 DE 09 1E 91 E2 C5

  /mnt/c/src/tmp$ touch empty.c
  /mnt/c/src/tmp$ cl.exe /Zi /Brepro empty.c /c
  Microsoft (R) C/C++ Optimizing Compiler Version 19.15.26726 for x64
  Copyright (C) Microsoft Corporation.  All rights reserved.
  
  empty.c
  /mnt/c/src/tmp$ link.exe /Brepro empty.obj /noentry /dll
  Microsoft (R) Incremental Linker Version 14.15.26726.0
  Copyright (C) Microsoft Corporation.  All rights reserved.
  
  /mnt/c/src/tmp$ dumpbin.exe /all empty.dll | grep repro
      1B739ED0 repro         24 00001064      264    B9 0B 63 16 2D E7 5B D7 F6 93 F0 91 BA A6 A6 C6 C2 FF B2 D3 1A D1 A6 AB 2C 2C 47 67 D0 9E 73 1B
  /mnt/c/src/tmp$ link.exe /Brepro empty.obj /noentry /dll /debug
  Microsoft (R) Incremental Linker Version 14.15.26726.0
  Copyright (C) Microsoft Corporation.  All rights reserved.
  
  /mnt/c/src/tmp$ dumpbin.exe /all empty.dll | grep repro
      B3F770F9 repro         24 000011A8      3A8    F7 04 47 23 67 3D ED E0 F7 D5 A8 9C 24 8C FD 50 DE BD FD 4C 29 65 B3 5B 81 38 CB 67 F9 70 F7 B3


https://reviews.llvm.org/D51652