1 files changed, 35 insertions, 0 deletions
diff --git a/clang/lib/Frontend/FrontendOptions.cpp b/clang/lib/Frontend/FrontendOptions.cpp
new file mode 100644
index 000000000000..5c1fbf889c23
--- /dev/null
+++ b/clang/lib/Frontend/FrontendOptions.cpp
@@ -0,0 +1,35 @@
+//===- FrontendOptions.cpp ------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Frontend/FrontendOptions.h"
+#include "clang/Basic/LangStandard.h"
+#include "llvm/ADT/StringSwitch.h"
+
+using namespace clang;
+
+InputKind FrontendOptions::getInputKindForExtension(StringRef Extension) {
+  return llvm::StringSwitch<InputKind>(Extension)
+      .Cases("ast", "pcm", InputKind(Language::Unknown, InputKind::Precompiled))
+      .Case("c", Language::C)
+      .Cases("S", "s", Language::Asm)
+      .Case("i", InputKind(Language::C).getPreprocessed())
+      .Case("ii", InputKind(Language::CXX).getPreprocessed())
+      .Case("cui", InputKind(Language::CUDA).getPreprocessed())
+      .Case("m", Language::ObjC)
+      .Case("mi", InputKind(Language::ObjC).getPreprocessed())
+      .Cases("mm", "M", Language::ObjCXX)
+      .Case("mii", InputKind(Language::ObjCXX).getPreprocessed())
+      .Cases("C", "cc", "cp", Language::CXX)
+      .Cases("cpp", "CPP", "c++", "cxx", "hpp", Language::CXX)
+      .Case("cppm", Language::CXX)
+      .Case("iim", InputKind(Language::CXX).getPreprocessed())
+      .Case("cl", Language::OpenCL)
+      .Case("cu", Language::CUDA)
+      .Cases("ll", "bc", Language::LLVM_IR)
+      .Default(Language::Unknown);
+}