Adding files for Microchip's PIC16 target.

A brief description about PIC16:
===============================
PIC16 is an 8-bit microcontroller with only one 8-bit register which is the 
accumulator. All arithmetic/load/store operations are 8-bit only.
The architecture has two address spaces: program and data. The program memory 
is divided into 2K pages and the data memory is divided into banks of 128 byte, with only 80 usable bytes, resulting in an non-contiguous data memory. 

It supports direct data memory access (by specifying the address as part of the instruction) and indirect data and program memory access (in an unorthodox fashion which utilize a 16 bit pointer register). 

Two classes of registers exist: (8-bit class which is only one
accumulator) (16-bit class, which contains one or more 16 bit
pointer(s))



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51027 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 61 insertions, 0 deletions

diff --git a/lib/Target/PIC16/PIC16TargetMachine.h b/lib/Target/PIC16/PIC16TargetMachine.h
new file mode 100644
index 0000000000..93ef0d1e99
--- /dev/null
+++ b/lib/Target/PIC16/PIC16TargetMachine.h
@@ -0,0 +1,61 @@
+//===-- PIC16TargetMachine.h - Define TargetMachine for PIC16 ---*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the PIC16 specific subclass of TargetMachine.
+//
+//===----------------------------------------------------------------------===//
+
+
+#ifndef PIC16_TARGETMACHINE_H
+#define PIC16_TARGETMACHINE_H
+
+#include "PIC16InstrInfo.h"
+#include "PIC16ISelLowering.h"
+#include "PIC16Subtarget.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetFrameInfo.h"
+#include "llvm/Target/TargetMachine.h"
+
+namespace llvm {
+
+/// PIC16TargetMachine
+///
+class PIC16TargetMachine : public LLVMTargetMachine {
+  PIC16Subtarget        Subtarget;
+  const TargetData      DataLayout;       // Calculates type size & alignment
+  PIC16InstrInfo        InstrInfo;
+  PIC16TargetLowering   TLInfo;
+  TargetFrameInfo       FrameInfo;
+
+protected:
+  virtual const TargetAsmInfo *createTargetAsmInfo() const;
+  
+public:
+  PIC16TargetMachine(const Module &M, const std::string &FS);
+
+  virtual const TargetFrameInfo *getFrameInfo() const 
+  { return &FrameInfo; }
+  virtual const PIC16InstrInfo *getInstrInfo() const 
+  { return &InstrInfo; }
+  virtual const TargetData *getTargetData() const    
+  { return &DataLayout; }
+  virtual PIC16TargetLowering *getTargetLowering() const 
+  { return const_cast<PIC16TargetLowering*>(&TLInfo); }
+  virtual const TargetRegisterInfo *getRegisterInfo() const 
+  { return &InstrInfo.getRegisterInfo(); }
+  
+  virtual bool addInstSelector(PassManagerBase &PM, bool Fast);
+  virtual bool addPrologEpilogInserter(PassManagerBase &PM, bool Fast);
+  virtual bool addPreEmitPass(PassManagerBase &PM, bool Fast);
+  virtual bool addAssemblyEmitter(PassManagerBase &PM, bool Fast, 
+		    		  std::ostream &Out);
+};
+} // end namespace llvm
+
+#endif