Define class MipsMCInstLower.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134633 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Mips/MipsMCInstLower.cpp b/lib/Target/Mips/MipsMCInstLower.cpp
new file mode 100644
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--- /dev/null
+++ b/lib/Target/Mips/MipsMCInstLower.cpp
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+//===-- MipsMCInstLower.cpp - Convert Mips 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 Mips MachineInstrs to their corresponding
+// MCInst records.
+//
+//===----------------------------------------------------------------------===//
+
+#include "MipsMCInstLower.h"
+#include "MipsAsmPrinter.h"
+#include "MipsInstrInfo.h"
+#include "MipsMCSymbolRefExpr.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/CodeGen/MachineOperand.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/Target/Mangler.h"
+using namespace llvm;
+
+MipsMCInstLower::MipsMCInstLower(Mangler *mang, const MachineFunction &mf,
+ MipsAsmPrinter &asmprinter)
+ : Ctx(mf.getContext()), Mang(mang), AsmPrinter(asmprinter) {}
+
+MCOperand MipsMCInstLower::LowerSymbolOperand(const MachineOperand &MO,
+ MachineOperandType MOTy) const {
+ MipsMCSymbolRefExpr::VariantKind Kind;
+ const MCSymbol *Symbol;
+ int Offset = 0;
+
+ switch(MO.getTargetFlags()) {
+ case MipsII::MO_NO_FLAG: Kind = MipsMCSymbolRefExpr::VK_Mips_None; break;
+ case MipsII::MO_GPREL: Kind = MipsMCSymbolRefExpr::VK_Mips_GPREL; break;
+ case MipsII::MO_GOT_CALL: Kind = MipsMCSymbolRefExpr::VK_Mips_GOT_CALL; break;
+ case MipsII::MO_GOT: Kind = MipsMCSymbolRefExpr::VK_Mips_GOT; break;
+ case MipsII::MO_ABS_HI: Kind = MipsMCSymbolRefExpr::VK_Mips_ABS_HI; break;
+ case MipsII::MO_ABS_LO: Kind = MipsMCSymbolRefExpr::VK_Mips_ABS_LO; break;
+ case MipsII::MO_TLSGD: Kind = MipsMCSymbolRefExpr::VK_Mips_TLSGD; break;
+ case MipsII::MO_GOTTPREL: Kind = MipsMCSymbolRefExpr::VK_Mips_GOTTPREL; break;
+ case MipsII::MO_TPREL_HI: Kind = MipsMCSymbolRefExpr::VK_Mips_TPREL_HI; break;
+ case MipsII::MO_TPREL_LO: Kind = MipsMCSymbolRefExpr::VK_Mips_TPREL_LO; break;
+ }
+
+ switch (MOTy) {
+ case MachineOperand::MO_MachineBasicBlock:
+ Symbol = MO.getMBB()->getSymbol();
+ break;
+
+ case MachineOperand::MO_GlobalAddress:
+ Symbol = Mang->getSymbol(MO.getGlobal());
+ break;
+
+ case MachineOperand::MO_BlockAddress:
+ Symbol = AsmPrinter.GetBlockAddressSymbol(MO.getBlockAddress());
+ break;
+
+ case MachineOperand::MO_ExternalSymbol:
+ Symbol = AsmPrinter.GetExternalSymbolSymbol(MO.getSymbolName());
+ break;
+
+ case MachineOperand::MO_JumpTableIndex:
+ Symbol = AsmPrinter.GetJTISymbol(MO.getIndex());
+ break;
+
+ case MachineOperand::MO_ConstantPoolIndex:
+ Symbol = AsmPrinter.GetCPISymbol(MO.getIndex());
+ if (MO.getOffset())
+ Offset = MO.getOffset();
+ break;
+
+ default:
+ llvm_unreachable("<unknown operand type>");
+ }
+
+ return MCOperand::CreateExpr(MipsMCSymbolRefExpr::Create(Kind, Symbol, Offset,
+ Ctx));
+}
+
+void MipsMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
+ OutMI.setOpcode(MI->getOpcode());
+
+ for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
+ const MachineOperand &MO = MI->getOperand(i);
+ MCOperand MCOp;
+ MachineOperandType MOTy = MO.getType();
+
+ switch (MOTy) {
+ default:
+ MI->dump();
+ llvm_unreachable("unknown operand type");
+ case MachineOperand::MO_Register:
+ // Ignore all implicit register operands.
+ if (MO.isImplicit()) continue;
+ MCOp = MCOperand::CreateReg(MO.getReg());
+ break;
+ case MachineOperand::MO_Immediate:
+ MCOp = MCOperand::CreateImm(MO.getImm());
+ break;
+ case MachineOperand::MO_MachineBasicBlock:
+ case MachineOperand::MO_GlobalAddress:
+ case MachineOperand::MO_ExternalSymbol:
+ case MachineOperand::MO_JumpTableIndex:
+ case MachineOperand::MO_ConstantPoolIndex:
+ case MachineOperand::MO_BlockAddress:
+ MCOp = LowerSymbolOperand(MO, MOTy);
+ break;
+ }
+
+ OutMI.addOperand(MCOp);
+ }
+}