From d60a65abb6b050e10d9efdbc56dcb2e2e4772af1 Mon Sep 17 00:00:00 2001
From: David Blaikie <dblaikie@gmail.com>
Date: Fri, 4 Mar 2022 05:19:51 +0000
Subject: [PATCH] Fix for D119899

---
 llvm/lib/TableGen/Parser.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/llvm/lib/TableGen/Parser.cpp b/llvm/lib/TableGen/Parser.cpp
index 47882c8524ab..0ccd564bef23 100644
--- a/llvm/lib/TableGen/Parser.cpp
+++ b/llvm/lib/TableGen/Parser.cpp
@@ -21,6 +21,7 @@ bool llvm::TableGenParseFile(std::unique_ptr<MemoryBuffer> Buffer,
   RecordKeeper Records;
   Records.saveInputFilename(Buffer->getBufferIdentifier().str());
 
+  SrcMgr = SourceMgr();
   SrcMgr.AddNewSourceBuffer(std::move(Buffer), SMLoc());
   SrcMgr.setIncludeDirs(IncludeDirs);
   TGParser Parser(SrcMgr, /*Macros=*/None, Records);