Let me introduce you to the early stages of the llvm backend for the alpha processor

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19764 91177308-0d34-0410-b5e6-96231b3b80d8

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diff --git a/lib/Target/Alpha/Alpha.h b/lib/Target/Alpha/Alpha.h
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+//===-- Alpha.h - Top-level interface for Alpha representation -*- C++ -*-//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+//
+// This file contains the entry points for global functions defined in the LLVM
+// Alpha back-end.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef TARGET_ALPHA_H
+#define TARGET_ALPHA_H
+
+#include <iosfwd>
+
+namespace llvm {
+
+  class FunctionPass;
+  class TargetMachine;
+
+  FunctionPass *createAlphaSimpleInstructionSelector(TargetMachine &TM);
+  FunctionPass *createAlphaCodePrinterPass(std::ostream &OS,
+                                             TargetMachine &TM);
+  FunctionPass *createAlphaPatternInstructionSelector(TargetMachine &TM);
+
+} // end namespace llvm;
+
+// Defines symbolic names for Alpha registers.  This defines a mapping from
+// register name to register number.
+//
+#include "AlphaGenRegisterNames.inc"
+
+// Defines symbolic names for the Alpha instructions.
+//
+#include "AlphaGenInstrNames.inc"
+
+#endif