1 files changed, 355 insertions, 0 deletions
diff --git a/lib/Target/Sparc/AsmPrinter/SparcAsmPrinter.cpp b/lib/Target/Sparc/AsmPrinter/SparcAsmPrinter.cpp
new file mode 100644
index 0000000..61707f5
--- /dev/null
+++ b/lib/Target/Sparc/AsmPrinter/SparcAsmPrinter.cpp
@@ -0,0 +1,355 @@
+//===-- SparcAsmPrinter.cpp - Sparc 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 SPARC assembly language.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "asm-printer"
+#include "Sparc.h"
+#include "SparcInstrInfo.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/TargetMachine.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/MathExtras.h"
+#include <cctype>
+#include <cstring>
+#include <map>
+using namespace llvm;
+
+STATISTIC(EmittedInsts, "Number of machine instrs printed");
+
+namespace {
+  class VISIBILITY_HIDDEN SparcAsmPrinter : public AsmPrinter {
+    /// We name each basic block in a Function with a unique number, so
+    /// that we can consistently refer to them later. This is cleared
+    /// at the beginning of each call to runOnMachineFunction().
+    ///
+    typedef std::map<const Value *, unsigned> ValueMapTy;
+    ValueMapTy NumberForBB;
+  public:
+    explicit SparcAsmPrinter(raw_ostream &O, TargetMachine &TM,
+                             const TargetAsmInfo *T, CodeGenOpt::Level OL,
+                             bool V)
+      : AsmPrinter(O, TM, T, OL, V) {}
+
+    virtual const char *getPassName() const {
+      return "Sparc Assembly Printer";
+    }
+
+    void printModuleLevelGV(const GlobalVariable* GVar);
+    void printOperand(const MachineInstr *MI, int opNum);
+    void printMemOperand(const MachineInstr *MI, int opNum,
+                         const char *Modifier = 0);
+    void printCCOperand(const MachineInstr *MI, int opNum);
+
+    bool printInstruction(const MachineInstr *MI);  // autogenerated.
+    bool runOnMachineFunction(MachineFunction &F);
+    bool doInitialization(Module &M);
+    bool doFinalization(Module &M);
+    bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+                       unsigned AsmVariant, const char *ExtraCode);
+    bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
+                             unsigned AsmVariant, const char *ExtraCode);
+  };
+} // end of anonymous namespace
+
+#include "SparcGenAsmWriter.inc"
+
+/// createSparcCodePrinterPass - Returns a pass that prints the SPARC
+/// 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::createSparcCodePrinterPass(raw_ostream &o,
+                                               TargetMachine &tm,
+                                               CodeGenOpt::Level OptLevel,
+                                               bool verbose) {
+  return new SparcAsmPrinter(o, tm, tm.getTargetAsmInfo(), OptLevel, verbose);
+}
+
+/// runOnMachineFunction - This uses the printInstruction()
+/// method to print assembly for each instruction.
+///
+bool SparcAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+  this->MF = &MF;
+
+  SetupMachineFunction(MF);
+
+  // Print out constants referenced by the function
+  EmitConstantPool(MF.getConstantPool());
+
+  // BBNumber is used here so that a given Printer will never give two
+  // BBs the same name. (If you have a better way, please let me know!)
+  static unsigned BBNumber = 0;
+
+  O << "\n\n";
+
+  // Print out the label for the function.
+  const Function *F = MF.getFunction();
+  SwitchToSection(TAI->SectionForGlobal(F));
+  EmitAlignment(4, F);
+  O << "\t.globl\t" << CurrentFnName << '\n';
+
+  printVisibility(CurrentFnName, F->getVisibility());
+
+  O << "\t.type\t" << CurrentFnName << ", #function\n";
+  O << CurrentFnName << ":\n";
+
+  // Number each basic block so that we can consistently refer to them
+  // in PC-relative references.
+  // FIXME: Why not use the MBB numbers?
+  NumberForBB.clear();
+  for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
+       I != E; ++I) {
+    NumberForBB[I->getBasicBlock()] = BBNumber++;
+  }
+
+  // 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 (I != MF.begin()) {
+      printBasicBlockLabel(I, true, true);
+      O << '\n';
+    }
+    for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
+         II != E; ++II) {
+      // Print the assembly for the instruction.
+      printInstruction(II);
+      ++EmittedInsts;
+    }
+  }
+
+  // We didn't modify anything.
+  return false;
+}
+
+void SparcAsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
+  const MachineOperand &MO = MI->getOperand (opNum);
+  const TargetRegisterInfo &RI = *TM.getRegisterInfo();
+  bool CloseParen = false;
+  if (MI->getOpcode() == SP::SETHIi && !MO.isReg() && !MO.isImm()) {
+    O << "%hi(";
+    CloseParen = true;
+  } else if ((MI->getOpcode() == SP::ORri || MI->getOpcode() == SP::ADDri) &&
+             !MO.isReg() && !MO.isImm()) {
+    O << "%lo(";
+    CloseParen = true;
+  }
+  switch (MO.getType()) {
+  case MachineOperand::MO_Register:
+    if (TargetRegisterInfo::isPhysicalRegister(MO.getReg()))
+      O << "%" << LowercaseString (RI.get(MO.getReg()).AsmName);
+    else
+      O << "%reg" << MO.getReg();
+    break;
+
+  case MachineOperand::MO_Immediate:
+    O << (int)MO.getImm();
+    break;
+  case MachineOperand::MO_MachineBasicBlock:
+    printBasicBlockLabel(MO.getMBB());
+    return;
+  case MachineOperand::MO_GlobalAddress:
+    {
+      const GlobalValue *GV = MO.getGlobal();
+      O << Mang->getValueName(GV);
+    }
+    break;
+  case MachineOperand::MO_ExternalSymbol:
+    O << MO.getSymbolName();
+    break;
+  case MachineOperand::MO_ConstantPoolIndex:
+    O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
+      << MO.getIndex();
+    break;
+  default:
+    O << "<unknown operand type>"; abort (); break;
+  }
+  if (CloseParen) O << ")";
+}
+
+void SparcAsmPrinter::printMemOperand(const MachineInstr *MI, int opNum,
+                                      const char *Modifier) {
+  printOperand(MI, opNum);
+
+  // If this is an ADD operand, emit it like normal operands.
+  if (Modifier && !strcmp(Modifier, "arith")) {
+    O << ", ";
+    printOperand(MI, opNum+1);
+    return;
+  }
+
+  if (MI->getOperand(opNum+1).isReg() &&
+      MI->getOperand(opNum+1).getReg() == SP::G0)
+    return;   // don't print "+%g0"
+  if (MI->getOperand(opNum+1).isImm() &&
+      MI->getOperand(opNum+1).getImm() == 0)
+    return;   // don't print "+0"
+
+  O << "+";
+  if (MI->getOperand(opNum+1).isGlobal() ||
+      MI->getOperand(opNum+1).isCPI()) {
+    O << "%lo(";
+    printOperand(MI, opNum+1);
+    O << ")";
+  } else {
+    printOperand(MI, opNum+1);
+  }
+}
+
+void SparcAsmPrinter::printCCOperand(const MachineInstr *MI, int opNum) {
+  int CC = (int)MI->getOperand(opNum).getImm();
+  O << SPARCCondCodeToString((SPCC::CondCodes)CC);
+}
+
+bool SparcAsmPrinter::doInitialization(Module &M) {
+  Mang = new Mangler(M, "", TAI->getPrivateGlobalPrefix());
+  return false; // success
+}
+
+bool SparcAsmPrinter::doFinalization(Module &M) {
+  // Print out module-level global variables here.
+  for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
+       I != E; ++I)
+    printModuleLevelGV(I);
+
+  O << '\n';
+
+  return AsmPrinter::doFinalization(M);
+}
+
+void SparcAsmPrinter::printModuleLevelGV(const GlobalVariable* GVar) {
+  const TargetData *TD = TM.getTargetData();
+
+  if (!GVar->hasInitializer())
+    return;  // External global require no code
+
+  // Check to see if this is a special global used by LLVM, if so, emit it.
+  if (EmitSpecialLLVMGlobal(GVar))
+    return;
+
+  O << "\n\n";
+  std::string name = Mang->getValueName(GVar);
+  Constant *C = GVar->getInitializer();
+  unsigned Size = TD->getTypeAllocSize(C->getType());
+  unsigned Align = TD->getPreferredAlignment(GVar);
+
+  printVisibility(name, GVar->getVisibility());
+
+  SwitchToSection(TAI->SectionForGlobal(GVar));
+
+  if (C->isNullValue() && !GVar->hasSection()) {
+    if (!GVar->isThreadLocal() &&
+        (GVar->hasLocalLinkage() || GVar->isWeakForLinker())) {
+      if (Size == 0) Size = 1;   // .comm Foo, 0 is undefined, avoid it.
+
+      if (GVar->hasLocalLinkage())
+        O << "\t.local " << name << '\n';
+
+      O << TAI->getCOMMDirective() << name << ',' << Size;
+      if (TAI->getCOMMDirectiveTakesAlignment())
+        O << ',' << (1 << Align);
+
+      O << '\n';
+      return;
+    }
+  }
+
+  switch (GVar->getLinkage()) {
+   case GlobalValue::CommonLinkage:
+   case GlobalValue::LinkOnceAnyLinkage:
+   case GlobalValue::LinkOnceODRLinkage:
+   case GlobalValue::WeakAnyLinkage: // FIXME: Verify correct for weak.
+   case GlobalValue::WeakODRLinkage: // FIXME: Verify correct for weak.
+    // Nonnull linkonce -> weak
+    O << "\t.weak " << name << '\n';
+    break;
+   case GlobalValue::AppendingLinkage:
+    // FIXME: appending linkage variables should go into a section of
+    // their name or something.  For now, just emit them as external.
+   case GlobalValue::ExternalLinkage:
+    // If external or appending, declare as a global symbol
+    O << TAI->getGlobalDirective() << name << '\n';
+    // FALL THROUGH
+   case GlobalValue::PrivateLinkage:
+   case GlobalValue::InternalLinkage:
+    break;
+   case GlobalValue::GhostLinkage:
+    cerr << "Should not have any unmaterialized functions!\n";
+    abort();
+   case GlobalValue::DLLImportLinkage:
+    cerr << "DLLImport linkage is not supported by this target!\n";
+    abort();
+   case GlobalValue::DLLExportLinkage:
+    cerr << "DLLExport linkage is not supported by this target!\n";
+    abort();
+   default:
+    assert(0 && "Unknown linkage type!");
+  }
+
+  EmitAlignment(Align, GVar);
+
+  if (TAI->hasDotTypeDotSizeDirective()) {
+    O << "\t.type " << name << ",#object\n";
+    O << "\t.size " << name << ',' << Size << '\n';
+  }
+
+  O << name << ":\n";
+  EmitGlobalConstant(C);
+}
+
+/// PrintAsmOperand - Print out an operand for an inline asm expression.
+///
+bool SparcAsmPrinter::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 SparcAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
+                                            unsigned OpNo,
+                                            unsigned AsmVariant,
+                                            const char *ExtraCode) {
+  if (ExtraCode && ExtraCode[0])
+    return true;  // Unknown modifier
+
+  O << '[';
+  printMemOperand(MI, OpNo);
+  O << ']';
+
+  return false;
+}