[WebAssembly] Initial WebAssembly backend
This WebAssembly backend is just a skeleton at this time and is not yet
functional.
llvm-svn: 241022
diff --git a/llvm/lib/Target/WebAssembly/WebAssembly.td b/llvm/lib/Target/WebAssembly/WebAssembly.td
new file mode 100644
index 0000000..f5e2564
--- /dev/null
+++ b/llvm/lib/Target/WebAssembly/WebAssembly.td
@@ -0,0 +1,58 @@
+//- WebAssembly.td - Describe the WebAssembly Target Machine --*- tablegen -*-//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This is a target description file for the WebAssembly architecture, which is
+// also known as "wasm".
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+// Target-independent interfaces which we are implementing
+//===----------------------------------------------------------------------===//
+
+include "llvm/Target/Target.td"
+
+//===----------------------------------------------------------------------===//
+// WebAssembly Subtarget features.
+//===----------------------------------------------------------------------===//
+
+def FeatureSIMD : SubtargetFeature<"simd", "HasSIMD", "true",
+ "Enable SIMD">;
+
+//===----------------------------------------------------------------------===//
+// Architectures.
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+// Register File Description
+//===----------------------------------------------------------------------===//
+
+include "WebAssemblyRegisterInfo.td"
+
+//===----------------------------------------------------------------------===//
+// Instruction Descriptions
+//===----------------------------------------------------------------------===//
+
+include "WebAssemblyInstrInfo.td"
+
+def WebAssemblyInstrInfo : InstrInfo;
+
+//===----------------------------------------------------------------------===//
+// WebAssembly Processors supported.
+//===----------------------------------------------------------------------===//
+
+def : ProcessorModel<"generic", NoSchedModel, [FeatureSIMD]>;
+
+//===----------------------------------------------------------------------===//
+// Target Declaration
+//===----------------------------------------------------------------------===//
+
+def WebAssembly : Target {
+ let InstructionSet = WebAssemblyInstrInfo;
+}