1 files changed, 281 insertions, 0 deletions
diff --git a/lib/Target/MSP430/AsmPrinter/MSP430AsmPrinter.cpp b/lib/Target/MSP430/AsmPrinter/MSP430AsmPrinter.cpp
new file mode 100644
index 0000000..852019f
--- /dev/null
+++ b/lib/Target/MSP430/AsmPrinter/MSP430AsmPrinter.cpp
@@ -0,0 +1,281 @@
+//===-- 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 "MSP430MCAsmInfo.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/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/Target/TargetRegistry.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/FormattedStream.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/Support/ErrorHandling.h"
+
+using namespace llvm;
+
+STATISTIC(EmittedInsts, "Number of machine instrs printed");
+
+namespace {
+  class VISIBILITY_HIDDEN MSP430AsmPrinter : public AsmPrinter {
+  public:
+    MSP430AsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
+                     const MCAsmInfo *MAI, bool V)
+      : AsmPrinter(O, TM, MAI, V) {}
+
+    virtual const char *getPassName() const {
+      return "MSP430 Assembly Printer";
+    }
+
+    void printOperand(const MachineInstr *MI, int OpNum,
+                      const char* Modifier = 0);
+    void printSrcMemOperand(const MachineInstr *MI, int OpNum,
+                            const char* Modifier = 0);
+    void printCCOperand(const MachineInstr *MI, int OpNum);
+    void printInstruction(const MachineInstr *MI);  // autogenerated.
+    static const char *getRegisterName(unsigned RegNo);
+
+    void printMachineInstruction(const MachineInstr * MI);
+    bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+                         unsigned AsmVariant,
+                         const char *ExtraCode);
+    bool PrintAsmMemoryOperand(const MachineInstr *MI,
+                               unsigned OpNo, unsigned AsmVariant,
+                               const char *ExtraCode);
+
+    void emitFunctionHeader(const MachineFunction &MF);
+    bool runOnMachineFunction(MachineFunction &F);
+
+    virtual void PrintGlobalVariable(const GlobalVariable *GV) {
+      // FIXME: No support for global variables?
+    }
+
+    void getAnalysisUsage(AnalysisUsage &AU) const {
+      AsmPrinter::getAnalysisUsage(AU);
+      AU.setPreservesAll();
+    }
+  };
+} // end of anonymous namespace
+
+#include "MSP430GenAsmWriter.inc"
+
+
+void MSP430AsmPrinter::emitFunctionHeader(const MachineFunction &MF) {
+  const Function *F = MF.getFunction();
+
+  OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
+
+  unsigned FnAlign = MF.getAlignment();
+  EmitAlignment(FnAlign, F);
+
+  switch (F->getLinkage()) {
+  default: llvm_unreachable("Unknown linkage type!");
+  case Function::InternalLinkage:  // Symbols default to internal.
+  case Function::PrivateLinkage:
+  case Function::LinkerPrivateLinkage:
+    break;
+  case Function::ExternalLinkage:
+    O << "\t.globl\t" << CurrentFnName << '\n';
+    break;
+  case Function::LinkOnceAnyLinkage:
+  case Function::LinkOnceODRLinkage:
+  case Function::WeakAnyLinkage:
+  case Function::WeakODRLinkage:
+    O << "\t.weak\t" << CurrentFnName << '\n';
+    break;
+  }
+
+  printVisibility(CurrentFnName, F->getVisibility());
+
+  O << "\t.type\t" << CurrentFnName << ",@function\n"
+    << CurrentFnName << ":\n";
+}
+
+bool MSP430AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+  SetupMachineFunction(MF);
+  O << "\n\n";
+
+  // Print the 'header' of function
+  emitFunctionHeader(MF);
+
+  // Print out code for the function.
+  for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
+       I != E; ++I) {
+    // Print a label for the basic block.
+    EmitBasicBlockStart(I);
+
+    for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
+         II != E; ++II)
+      // Print the assembly for the instruction.
+      printMachineInstruction(II);
+  }
+
+  if (MAI->hasDotTypeDotSizeDirective())
+    O << "\t.size\t" << CurrentFnName << ", .-" << CurrentFnName << '\n';
+
+  // We didn't modify anything
+  return false;
+}
+
+void MSP430AsmPrinter::printMachineInstruction(const MachineInstr *MI) {
+  ++EmittedInsts;
+
+  processDebugLoc(MI, true);
+
+  // Call the autogenerated instruction printer routines.
+  printInstruction(MI);
+
+  if (VerboseAsm && !MI->getDebugLoc().isUnknown())
+    EmitComments(*MI);
+  O << '\n';
+
+  processDebugLoc(MI, false);
+}
+
+void MSP430AsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
+                                    const char* Modifier) {
+  const MachineOperand &MO = MI->getOperand(OpNum);
+  switch (MO.getType()) {
+  case MachineOperand::MO_Register:
+    O << getRegisterName(MO.getReg());
+    return;
+  case MachineOperand::MO_Immediate:
+    if (!Modifier || strcmp(Modifier, "nohash"))
+      O << '#';
+    O << MO.getImm();
+    return;
+  case MachineOperand::MO_MachineBasicBlock:
+    GetMBBSymbol(MO.getMBB()->getNumber())->print(O, MAI);
+    return;
+  case MachineOperand::MO_GlobalAddress: {
+    bool isMemOp  = Modifier && !strcmp(Modifier, "mem");
+    std::string Name = Mang->getMangledName(MO.getGlobal());
+    uint64_t Offset = MO.getOffset();
+
+    O << (isMemOp ? '&' : '#');
+    if (Offset)
+      O << '(' << Offset << '+';
+
+    O << Name;
+    if (Offset)
+      O << ')';
+
+    return;
+  }
+  case MachineOperand::MO_ExternalSymbol: {
+    bool isMemOp  = Modifier && !strcmp(Modifier, "mem");
+    std::string Name(MAI->getGlobalPrefix());
+    Name += MO.getSymbolName();
+
+    O << (isMemOp ? '&' : '#') << Name;
+
+    return;
+  }
+  default:
+    llvm_unreachable("Not implemented yet!");
+  }
+}
+
+void MSP430AsmPrinter::printSrcMemOperand(const MachineInstr *MI, int OpNum,
+                                          const char* Modifier) {
+  const MachineOperand &Base = MI->getOperand(OpNum);
+  const MachineOperand &Disp = MI->getOperand(OpNum+1);
+
+  if (Base.isGlobal())
+    printOperand(MI, OpNum, "mem");
+  else if (Disp.isImm() && !Base.getReg())
+    printOperand(MI, OpNum);
+  else if (Base.getReg()) {
+    if (Disp.getImm()) {
+      printOperand(MI, OpNum + 1, "nohash");
+      O << '(';
+      printOperand(MI, OpNum);
+      O << ')';
+    } else {
+      O << '@';
+      printOperand(MI, OpNum);
+    }
+  } else
+    llvm_unreachable("Unsupported memory operand");
+}
+
+void MSP430AsmPrinter::printCCOperand(const MachineInstr *MI, int OpNum) {
+  unsigned CC = MI->getOperand(OpNum).getImm();
+
+  switch (CC) {
+  default:
+   llvm_unreachable("Unsupported CC code");
+   break;
+  case MSP430::COND_E:
+   O << "eq";
+   break;
+  case MSP430::COND_NE:
+   O << "ne";
+   break;
+  case MSP430::COND_HS:
+   O << "hs";
+   break;
+  case MSP430::COND_LO:
+   O << "lo";
+   break;
+  case MSP430::COND_GE:
+   O << "ge";
+   break;
+  case MSP430::COND_L:
+   O << 'l';
+   break;
+  }
+}
+
+/// PrintAsmOperand - Print out an operand for an inline asm expression.
+///
+bool MSP430AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+                                       unsigned AsmVariant,
+                                       const char *ExtraCode) {
+  // Does this asm operand have a single letter operand modifier?
+  if (ExtraCode && ExtraCode[0])
+    return true; // Unknown modifier.
+
+  printOperand(MI, OpNo);
+  return false;
+}
+
+bool MSP430AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
+                                             unsigned OpNo, unsigned AsmVariant,
+                                             const char *ExtraCode) {
+  if (ExtraCode && ExtraCode[0]) {
+    return true; // Unknown modifier.
+  }
+  printSrcMemOperand(MI, OpNo);
+  return false;
+}
+
+// Force static initialization.
+extern "C" void LLVMInitializeMSP430AsmPrinter() {
+  RegisterAsmPrinter<MSP430AsmPrinter> X(TheMSP430Target);
+}