1 files changed, 295 insertions, 0 deletions
diff --git a/llvm/lib/Target/Sparc/SparcAsmPrinter.cpp b/llvm/lib/Target/Sparc/SparcAsmPrinter.cpp
new file mode 100644
index 00000000000..2e88db63052
--- /dev/null
+++ b/llvm/lib/Target/Sparc/SparcAsmPrinter.cpp
@@ -0,0 +1,295 @@
+//===-- SparcAsmPrinter.cpp - Sparc LLVM assembly writer ------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and 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.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Sparc.h"
+#include "SparcInstrInfo.h"
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Module.h"
+#include "llvm/Assembly/Writer.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/MathExtras.h"
+#include <cctype>
+#include <iostream>
+using namespace llvm;
+
+namespace {
+  Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed");
+
+  struct SparcAsmPrinter : public AsmPrinter {
+    SparcAsmPrinter(std::ostream &O, TargetMachine &TM) : AsmPrinter(O, TM) {
+      Data16bitsDirective = "\t.half\t";
+      Data32bitsDirective = "\t.word\t";
+      Data64bitsDirective = 0;  // .xword is only supported by V9.
+      ZeroDirective = 0;  // no .zero or .space!
+      CommentString = "!";
+      ConstantPoolSection = "\t.section \".rodata\",#alloc\n";
+    }
+
+    /// 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;
+
+    virtual const char *getPassName() const {
+      return "Sparc Assembly Printer";
+    }
+
+    void printOperand(const MachineInstr *MI, int opNum);
+    void printMemOperand(const MachineInstr *MI, int opNum);
+    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);
+  };
+} // 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(std::ostream &o,
+                                               TargetMachine &tm) {
+  return new SparcAsmPrinter(o, tm);
+}
+
+/// runOnMachineFunction - This uses the printMachineInstruction()
+/// method to print assembly for each instruction.
+///
+bool SparcAsmPrinter::runOnMachineFunction(MachineFunction &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";
+  // What's my mangled name?
+  CurrentFnName = Mang->getValueName(MF.getFunction());
+
+  // Print out labels for the function.
+  O << "\t.text\n";
+  O << "\t.align 16\n";
+  O << "\t.globl\t" << CurrentFnName << "\n";
+  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.
+  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())
+      O << ".LBB" << Mang->getValueName(MF.getFunction ())
+        << "_" << I->getNumber () << ":\t! "
+        << I->getBasicBlock ()->getName () << "\n";
+    for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
+         II != E; ++II) {
+      // Print the assembly for the instruction.
+      O << "\t";
+      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 MRegisterInfo &RI = *TM.getRegisterInfo();
+  bool CloseParen = false;
+  if (MI->getOpcode() == SP::SETHIi && !MO.isRegister() && !MO.isImmediate()) {
+    O << "%hi(";
+    CloseParen = true;
+  } else if ((MI->getOpcode() == SP::ORri || MI->getOpcode() == SP::ADDri)
+             && !MO.isRegister() && !MO.isImmediate()) {
+    O << "%lo(";
+    CloseParen = true;
+  }
+  switch (MO.getType()) {
+  case MachineOperand::MO_VirtualRegister:
+    if (Value *V = MO.getVRegValueOrNull()) {
+      O << "<" << V->getName() << ">";
+      break;
+    }
+    // FALLTHROUGH
+  case MachineOperand::MO_MachineRegister:
+    if (MRegisterInfo::isPhysicalRegister(MO.getReg()))
+      O << "%" << LowercaseString (RI.get(MO.getReg()).Name);
+    else
+      O << "%reg" << MO.getReg();
+    break;
+
+  case MachineOperand::MO_SignExtendedImmed:
+  case MachineOperand::MO_UnextendedImmed:
+    O << (int)MO.getImmedValue();
+    break;
+  case MachineOperand::MO_MachineBasicBlock: {
+    MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
+    O << ".LBB" << Mang->getValueName(MBBOp->getParent()->getFunction())
+      << "_" << MBBOp->getNumber () << "\t! "
+      << MBBOp->getBasicBlock ()->getName ();
+    return;
+  }
+  case MachineOperand::MO_PCRelativeDisp:
+    std::cerr << "Shouldn't use addPCDisp() when building Sparc MachineInstrs";
+    abort ();
+    return;
+  case MachineOperand::MO_GlobalAddress:
+    O << Mang->getValueName(MO.getGlobal());
+    break;
+  case MachineOperand::MO_ExternalSymbol:
+    O << MO.getSymbolName();
+    break;
+  case MachineOperand::MO_ConstantPoolIndex:
+    O << PrivateGlobalPrefix << "CPI" << getFunctionNumber() << "_"
+      << MO.getConstantPoolIndex();
+    break;
+  default:
+    O << "<unknown operand type>"; abort (); break;
+  }
+  if (CloseParen) O << ")";
+}
+
+void SparcAsmPrinter::printMemOperand(const MachineInstr *MI, int opNum) {
+  printOperand(MI, opNum);
+  MachineOperand::MachineOperandType OpTy = MI->getOperand(opNum+1).getType();
+  
+  if ((OpTy == MachineOperand::MO_VirtualRegister ||
+       OpTy == MachineOperand::MO_MachineRegister) &&
+      MI->getOperand(opNum+1).getReg() == SP::G0)
+    return;   // don't print "+%g0"
+  if ((OpTy == MachineOperand::MO_SignExtendedImmed ||
+       OpTy == MachineOperand::MO_UnextendedImmed) &&
+      MI->getOperand(opNum+1).getImmedValue() == 0)
+    return;   // don't print "+0"
+  
+  O << "+";
+  if (OpTy == MachineOperand::MO_GlobalAddress ||
+      OpTy == MachineOperand::MO_ConstantPoolIndex) {
+    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).getImmedValue();
+  O << SPARCCondCodeToString((SPCC::CondCodes)CC);
+}
+
+
+
+bool SparcAsmPrinter::doInitialization(Module &M) {
+  Mang = new Mangler(M);
+  return false; // success
+}
+
+bool SparcAsmPrinter::doFinalization(Module &M) {
+  const TargetData &TD = TM.getTargetData();
+
+  // Print out module-level global variables here.
+  for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); I != E; ++I)
+    if (I->hasInitializer()) {   // External global require no code
+      O << "\n\n";
+      std::string name = Mang->getValueName(I);
+      Constant *C = I->getInitializer();
+      unsigned Size = TD.getTypeSize(C->getType());
+      unsigned Align = TD.getTypeAlignment(C->getType());
+
+      if (C->isNullValue() &&
+          (I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
+           I->hasWeakLinkage() /* FIXME: Verify correct */)) {
+        SwitchSection(".data", I);
+        if (I->hasInternalLinkage())
+          O << "\t.local " << name << "\n";
+
+        O << "\t.comm " << name << "," << TD.getTypeSize(C->getType())
+          << "," << (unsigned)TD.getTypeAlignment(C->getType());
+        O << "\t\t! ";
+        WriteAsOperand(O, I, true, true, &M);
+        O << "\n";
+      } else {
+        switch (I->getLinkage()) {
+        case GlobalValue::LinkOnceLinkage:
+        case GlobalValue::WeakLinkage:   // FIXME: Verify correct for weak.
+          // Nonnull linkonce -> weak
+          O << "\t.weak " << name << "\n";
+          SwitchSection("", I);
+          O << "\t.section\t\".llvm.linkonce.d." << name
+            << "\",\"aw\",@progbits\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 << "\t.globl " << name << "\n";
+          // FALL THROUGH
+        case GlobalValue::InternalLinkage:
+          if (C->isNullValue())
+            SwitchSection(".bss", I);
+          else
+            SwitchSection(".data", I);
+          break;
+        case GlobalValue::GhostLinkage:
+          std::cerr << "Should not have any unmaterialized functions!\n";
+          abort();
+        }
+
+        O << "\t.align " << Align << "\n";
+        O << "\t.type " << name << ",#object\n";
+        O << "\t.size " << name << "," << Size << "\n";
+        O << name << ":\t\t\t\t! ";
+        WriteAsOperand(O, I, true, true, &M);
+        O << " = ";
+        WriteAsOperand(O, C, false, false, &M);
+        O << "\n";
+        EmitGlobalConstant(C);
+      }
+    }
+
+  AsmPrinter::doFinalization(M);
+  return false; // success
+}