1 files changed, 43 insertions, 0 deletions
diff --git a/utils/TableGen/GlobalISel/CodeExpansions.h b/utils/TableGen/GlobalISel/CodeExpansions.h
new file mode 100644
index 000000000000..bb890ec8f57e
--- /dev/null
+++ b/utils/TableGen/GlobalISel/CodeExpansions.h
@@ -0,0 +1,43 @@
+//===- CodeExpansions.h - Record expansions for CodeExpander --------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file Record the expansions to use in a CodeExpander.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/StringMap.h"
+
+#ifndef LLVM_UTILS_TABLEGEN_CODEEXPANSIONS_H
+#define LLVM_UTILS_TABLEGEN_CODEEXPANSIONS_H
+namespace llvm {
+class CodeExpansions {
+public:
+  using const_iterator = StringMap<std::string>::const_iterator;
+
+protected:
+  StringMap<std::string> Expansions;
+
+public:
+  void declare(StringRef Name, StringRef Expansion) {
+    bool Inserted = Expansions.try_emplace(Name, Expansion).second;
+    assert(Inserted && "Declared variable twice");
+    (void)Inserted;
+  }
+
+  std::string lookup(StringRef Variable) const {
+    return Expansions.lookup(Variable);
+  }
+
+  const_iterator begin() const { return Expansions.begin(); }
+  const_iterator end() const { return Expansions.end(); }
+  const_iterator find(StringRef Variable) const {
+    return Expansions.find(Variable);
+  }
+};
+} // end namespace llvm
+#endif // ifndef LLVM_UTILS_TABLEGEN_CODEEXPANSIONS_H