[clang] [llvm] Add support for Windows hot-patching (PR #138972)

[via llvm-commits]

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+// This verifies that hotpatch function attributes are correctly propagated when compiling directly to OBJ.
+//
+// RUN: %clang_cl -c --target=x86_64-windows-msvc -O2 /Z7 -fms-hotpatch-functions-file=%S/ms-hotpatch-functions.txt /Fo%t.obj %s
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sivadeilra wrote:

Thanks.  I've added checks for targeting Windows/COFF to the code.

https://github.com/llvm/llvm-project/pull/138972