1 files changed, 109 insertions, 0 deletions
diff --git a/lib/Target/Sparc/SparcMCInstLower.cpp b/lib/Target/Sparc/SparcMCInstLower.cpp
new file mode 100644
index 0000000..737e378
--- /dev/null
+++ b/lib/Target/Sparc/SparcMCInstLower.cpp
@@ -0,0 +1,109 @@
+//===-- SparcMCInstLower.cpp - Convert Sparc MachineInstr to MCInst -------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains code to lower Sparc MachineInstrs to their corresponding
+// MCInst records.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Sparc.h"
+#include "MCTargetDesc/SparcMCExpr.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/CodeGen/MachineOperand.h"
+#include "llvm/IR/Mangler.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCInst.h"
+
+using namespace llvm;
+
+
+static MCOperand LowerSymbolOperand(const MachineInstr *MI,
+                                    const MachineOperand &MO,
+                                    AsmPrinter &AP) {
+
+  SparcMCExpr::VariantKind Kind =
+    (SparcMCExpr::VariantKind)MO.getTargetFlags();
+  const MCSymbol *Symbol = 0;
+
+  switch(MO.getType()) {
+  default: llvm_unreachable("Unknown type in LowerSymbolOperand");
+  case MachineOperand::MO_MachineBasicBlock:
+    Symbol = MO.getMBB()->getSymbol();
+    break;
+
+  case MachineOperand::MO_GlobalAddress:
+    Symbol = AP.getSymbol(MO.getGlobal());
+    break;
+
+  case MachineOperand::MO_BlockAddress:
+    Symbol = AP.GetBlockAddressSymbol(MO.getBlockAddress());
+    break;
+
+  case MachineOperand::MO_ExternalSymbol:
+    Symbol = AP.GetExternalSymbolSymbol(MO.getSymbolName());
+    break;
+
+  case MachineOperand::MO_ConstantPoolIndex:
+    Symbol = AP.GetCPISymbol(MO.getIndex());
+    break;
+  }
+
+  const MCSymbolRefExpr *MCSym = MCSymbolRefExpr::Create(Symbol,
+                                                         AP.OutContext);
+  const SparcMCExpr *expr = SparcMCExpr::Create(Kind, MCSym,
+                                                AP.OutContext);
+  return MCOperand::CreateExpr(expr);
+}
+
+static MCOperand LowerOperand(const MachineInstr *MI,
+                              const MachineOperand &MO,
+                              AsmPrinter &AP) {
+  switch(MO.getType()) {
+  default: llvm_unreachable("unknown operand type"); break;
+  case MachineOperand::MO_Register:
+    if (MO.isImplicit())
+      break;
+    return MCOperand::CreateReg(MO.getReg());
+
+  case MachineOperand::MO_Immediate:
+    return MCOperand::CreateImm(MO.getImm());
+
+  case MachineOperand::MO_MachineBasicBlock:
+  case MachineOperand::MO_GlobalAddress:
+  case MachineOperand::MO_BlockAddress:
+  case MachineOperand::MO_ExternalSymbol:
+  case MachineOperand::MO_ConstantPoolIndex:
+    return LowerSymbolOperand(MI, MO, AP);
+
+  case MachineOperand::MO_RegisterMask:   break;
+
+  }
+  return MCOperand();
+}
+
+void llvm::LowerSparcMachineInstrToMCInst(const MachineInstr *MI,
+                                          MCInst &OutMI,
+                                          AsmPrinter &AP)
+{
+
+  OutMI.setOpcode(MI->getOpcode());
+
+  for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
+    const MachineOperand &MO = MI->getOperand(i);
+    MCOperand MCOp = LowerOperand(MI, MO, AP);
+
+    if (MCOp.isValid())
+      OutMI.addOperand(MCOp);
+  }
+}