[WebAssembly] Initial WebAssembly backend

This WebAssembly backend is just a skeleton at this time and is not yet
functional.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241022 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/WebAssembly/WebAssemblyInstrInfo.h

@@ -0,0 +1,37 @@
+//=- WebAssemblyInstrInfo.h - WebAssembly Instruction Information -*- C++ -*-=//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief This file contains the WebAssembly implementation of the
+/// TargetInstrInfo class.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYINSTRINFO_H
+#define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYINSTRINFO_H
+
+#include "WebAssemblyRegisterInfo.h"
+#include "llvm/Target/TargetInstrInfo.h"
+
+namespace llvm {
+
+class WebAssemblySubtarget;
+
+class WebAssemblyInstrInfo final {
+  const WebAssemblyRegisterInfo RI;
+
+public:
+  explicit WebAssemblyInstrInfo(const WebAssemblySubtarget &STI);
+
+  const WebAssemblyRegisterInfo &getRegisterInfo() const { return RI; }
+};
+
+} // end namespace llvm
+
+#endif