aprantl added a comment.

I was going to ask why make this change, but looking at the patch, it's pretty 
obvious :-)



================
Comment at: clang/include/clang/Basic/Module.h:29
 #include "llvm/ADT/iterator_range.h"
+#include <algorithm>
 #include <array>
----------------
Can you move the code that depends on algorithm into a .cpp file?


================
Comment at: clang/include/clang/Basic/Module.h:70
+
+  static ASTFileSignature createDISentinel() {
+    ASTFileSignature Sentinel;
----------------
dang wrote:
> I couldn't find anywhere in the code base that checks the bit-pattern so I 
> left it as is. If anyone knows if someone could point me to the code that 
> checks this (if any code does check it) that would be nice.
The PCM hash is reused in CGDebugInfo as the DW_AT_dwo_id hash for the 
-gmodules debug info. This value is checked by dsymutil and LLDB.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D81347/new/

https://reviews.llvm.org/D81347



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