Dummy MSP430 backend

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70694 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/MSP430/MSP430AsmPrinter.cpp

@@ -0,0 +1,99 @@
+//===-- MSP430AsmPrinter.cpp - MSP430 LLVM assembly writer ------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains a printer that converts from our internal representation
+// of machine-dependent LLVM code to the MSP430 assembly language.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "asm-printer"
+#include "MSP430.h"
+#include "MSP430InstrInfo.h"
+#include "MSP430TargetMachine.h"
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Module.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/DwarfWriter.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace llvm;
+
+STATISTIC(EmittedInsts, "Number of machine instrs printed");
+
+namespace {
+  class VISIBILITY_HIDDEN MSP430AsmPrinter : public AsmPrinter {
+  public:
+    MSP430AsmPrinter(raw_ostream &O, MSP430TargetMachine &TM,
+                    const TargetAsmInfo *TAI, bool Fast, bool Verbose)
+      : AsmPrinter(O, TM, TAI, Fast, Verbose) {}
+
+    virtual const char *getPassName() const {
+      return "MSP430 Assembly Printer";
+    }
+
+    bool printInstruction(const MachineInstr *MI);  // autogenerated.
+    void printMachineInstruction(const MachineInstr * MI);
+    bool runOnMachineFunction(MachineFunction &F);
+    bool doInitialization(Module &M);
+    bool doFinalization(Module &M);
+
+    void getAnalysisUsage(AnalysisUsage &AU) const {
+      AsmPrinter::getAnalysisUsage(AU);
+      AU.setPreservesAll();
+    }
+  };
+} // end of anonymous namespace
+
+#include "MSP430GenAsmWriter.inc"
+
+/// createMSP430CodePrinterPass - Returns a pass that prints the MSP430
+/// assembly code for a MachineFunction to the given output stream,
+/// using the given target machine description.  This should work
+/// regardless of whether the function is in SSA form.
+///
+FunctionPass *llvm::createMSP430CodePrinterPass(raw_ostream &o,
+                                                MSP430TargetMachine &tm,
+                                                bool fast, bool verbose) {
+  return new MSP430AsmPrinter(o, tm, tm.getTargetAsmInfo(), fast, verbose);
+}
+
+bool MSP430AsmPrinter::doInitialization(Module &M) {
+  Mang = new Mangler(M, "", TAI->getPrivateGlobalPrefix());
+  return false; // success
+}
+
+
+bool MSP430AsmPrinter::doFinalization(Module &M) {
+  return AsmPrinter::doFinalization(M);
+}
+
+bool MSP430AsmPrinter::runOnMachineFunction(MachineFunction &F) {
+  // We didn't modify anything
+  return false;
+}
+
+void MSP430AsmPrinter::printMachineInstruction(const MachineInstr * MI) {
+  ++EmittedInsts;
+
+  // Call the autogenerated instruction printer routines.
+  if (printInstruction(MI))
+    return;
+
+  assert(0 && "Should not happen");
+}