[llvm] [Support] mmap when possible in getSTDIN. (PR #162013)

[via llvm-commits]

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@@ -143,7 +142,8 @@ class LLVM_ABI MemoryBuffer {
   getMemBufferCopy(StringRef InputData, const Twine &BufferName = "");
 
   /// Read all of stdin into a file buffer, and return it.
-  static ErrorOr<std::unique_ptr<MemoryBuffer>> getSTDIN();
+  static ErrorOr<std::unique_ptr<MemoryBuffer>>
+  getSTDIN(bool RequiresNullTerminatorRequires = true);
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aokblast wrote:

Thanks I would fix it after CI finish running

https://github.com/llvm/llvm-project/pull/162013