1 files changed, 237 insertions, 0 deletions
diff --git a/lib/Target/Blackfin/AsmPrinter/BlackfinAsmPrinter.cpp b/lib/Target/Blackfin/AsmPrinter/BlackfinAsmPrinter.cpp
new file mode 100644
index 0000000000..60744ddfff
--- /dev/null
+++ b/lib/Target/Blackfin/AsmPrinter/BlackfinAsmPrinter.cpp
@@ -0,0 +1,237 @@
+//===-- BlackfinAsmPrinter.cpp - Blackfin 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 GAS-format BLACKFIN assembly language.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "asm-printer"
+#include "Blackfin.h"
+#include "BlackfinInstrInfo.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/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/Target/TargetRegistry.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/Support/FormattedStream.h"
+
+using namespace llvm;
+
+STATISTIC(EmittedInsts, "Number of machine instrs printed");
+
+namespace {
+  class VISIBILITY_HIDDEN BlackfinAsmPrinter : public AsmPrinter {
+  public:
+    BlackfinAsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
+                       const TargetAsmInfo *TAI, bool V)
+      : AsmPrinter(O, TM, TAI, V) {}
+
+    virtual const char *getPassName() const {
+      return "Blackfin Assembly Printer";
+    }
+
+    void printOperand(const MachineInstr *MI, int opNum);
+    void printMemoryOperand(const MachineInstr *MI, int opNum);
+    bool printInstruction(const MachineInstr *MI);  // autogenerated.
+    void emitLinkage(const std::string &n, GlobalValue::LinkageTypes l);
+    bool runOnMachineFunction(MachineFunction &F);
+    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 PrintGlobalVariable(const GlobalVariable* GVar);
+  };
+} // end of anonymous namespace
+
+#include "BlackfinGenAsmWriter.inc"
+
+extern "C" void LLVMInitializeBlackfinAsmPrinter() {
+  RegisterAsmPrinter<BlackfinAsmPrinter> X(TheBlackfinTarget);
+}
+
+void BlackfinAsmPrinter::emitLinkage(const std::string &name,
+                                     GlobalValue::LinkageTypes l) {
+  switch (l) {
+  default: llvm_unreachable("Unknown linkage type!");
+  case GlobalValue::InternalLinkage:  // Symbols default to internal.
+  case GlobalValue::PrivateLinkage:
+  case GlobalValue::LinkerPrivateLinkage:
+    break;
+  case GlobalValue::ExternalLinkage:
+    O << TAI->getGlobalDirective() << name << "\n";
+    break;
+  case GlobalValue::LinkOnceAnyLinkage:
+  case GlobalValue::LinkOnceODRLinkage:
+  case GlobalValue::WeakAnyLinkage:
+  case GlobalValue::WeakODRLinkage:
+    O << TAI->getGlobalDirective() << name << "\n";
+    O << TAI->getWeakDefDirective() << name << "\n";
+    break;
+  }
+}
+
+void BlackfinAsmPrinter::PrintGlobalVariable(const GlobalVariable* GV) {
+  const TargetData *TD = TM.getTargetData();
+
+  if (!GV->hasInitializer() || EmitSpecialLLVMGlobal(GV))
+    return;
+
+  std::string name = Mang->getMangledName(GV);
+  Constant *C = GV->getInitializer();
+
+  SwitchToSection(getObjFileLowering().SectionForGlobal(GV, Mang, TM));
+  emitLinkage(name, GV->getLinkage());
+  EmitAlignment(TD->getPreferredAlignmentLog(GV), GV);
+  printVisibility(name, GV->getVisibility());
+
+  O << "\t.type " << name << ", STT_OBJECT\n";
+  O << "\t.size " << name << ',' << TD->getTypeAllocSize(C->getType()) << '\n';
+  O << name << ":\n";
+  EmitGlobalConstant(C);
+}
+
+/// runOnMachineFunction - This uses the printInstruction()
+/// method to print assembly for each instruction.
+///
+bool BlackfinAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+  SetupMachineFunction(MF);
+  EmitConstantPool(MF.getConstantPool());
+  EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
+
+  const Function *F = MF.getFunction();
+  SwitchToSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
+  EmitAlignment(2, F);
+  emitLinkage(CurrentFnName, F->getLinkage());
+  printVisibility(CurrentFnName, F->getVisibility());
+
+  O << "\t.type\t" << CurrentFnName << ", STT_FUNC\n"
+    << CurrentFnName << ":\n";
+
+  if (DW)
+    DW->BeginFunction(&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.
+    if (!VerboseAsm && (I->pred_empty() || I->isOnlyReachableByFallthrough())) {
+      // This is an entry block or a block that's only reachable via a
+      // fallthrough edge. In non-VerboseAsm mode, don't print the label.
+    } else {
+      printBasicBlockLabel(I, true, true, VerboseAsm);
+      O << '\n';
+    }
+
+    for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
+         II != E; ++II) {
+      // Print the assembly for the instruction.
+      printInstruction(II);
+      ++EmittedInsts;
+    }
+  }
+
+  O << "\t.size " << CurrentFnName << ", .-" << CurrentFnName << "\n";
+
+  if (DW)
+    DW->EndFunction(&MF);
+
+  return false;
+}
+
+void BlackfinAsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
+  const MachineOperand &MO = MI->getOperand (opNum);
+  const TargetRegisterInfo &RI = *TM.getRegisterInfo();
+  switch (MO.getType()) {
+  case MachineOperand::MO_Register:
+    assert (TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
+            "Virtual registers should be already mapped!");
+    O << RI.get(MO.getReg()).AsmName;
+    break;
+
+  case MachineOperand::MO_Immediate:
+    O << MO.getImm();
+    break;
+  case MachineOperand::MO_MachineBasicBlock:
+    printBasicBlockLabel(MO.getMBB(), false, false, false);
+    return;
+  case MachineOperand::MO_GlobalAddress:
+    O << Mang->getMangledName(MO.getGlobal());
+    printOffset(MO.getOffset());
+    break;
+  case MachineOperand::MO_ExternalSymbol:
+    O << Mang->makeNameProper(MO.getSymbolName());
+    break;
+  case MachineOperand::MO_ConstantPoolIndex:
+    O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
+      << MO.getIndex();
+    break;
+  case MachineOperand::MO_JumpTableIndex:
+    O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
+      << '_' << MO.getIndex();
+    break;
+  default:
+    llvm_unreachable("<unknown operand type>");
+    break;
+  }
+}
+
+void BlackfinAsmPrinter::printMemoryOperand(const MachineInstr *MI, int opNum) {
+  printOperand(MI, opNum);
+
+  if (MI->getOperand(opNum+1).isImm() && MI->getOperand(opNum+1).getImm() == 0)
+    return;
+
+  O << " + ";
+  printOperand(MI, opNum+1);
+}
+
+/// PrintAsmOperand - Print out an operand for an inline asm expression.
+///
+bool BlackfinAsmPrinter::PrintAsmOperand(const MachineInstr *MI,
+                                         unsigned OpNo,
+                                         unsigned AsmVariant,
+                                         const char *ExtraCode) {
+  if (ExtraCode && ExtraCode[0]) {
+    if (ExtraCode[1] != 0) return true; // Unknown modifier.
+
+    switch (ExtraCode[0]) {
+    default: return true;  // Unknown modifier.
+    case 'r':
+      break;
+    }
+  }
+
+  printOperand(MI, OpNo);
+
+  return false;
+}
+
+bool BlackfinAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
+                                               unsigned OpNo,
+                                               unsigned AsmVariant,
+                                               const char *ExtraCode) {
+  if (ExtraCode && ExtraCode[0])
+    return true;  // Unknown modifier
+
+  O << '[';
+  printOperand(MI, OpNo);
+  O << ']';
+
+  return false;
+}