1 //===- HexagonMCInstLower.cpp - Convert Hexagon MachineInstr to an MCInst -===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains code to lower Hexagon MachineInstrs to their corresponding
13 //===----------------------------------------------------------------------===//
16 #include "HexagonAsmPrinter.h"
17 #include "HexagonMachineFunctionInfo.h"
18 #include "llvm/Constants.h"
19 #include "llvm/CodeGen/MachineBasicBlock.h"
20 #include "llvm/MC/MCExpr.h"
21 #include "llvm/MC/MCInst.h"
22 #include "llvm/Target/Mangler.h"
26 static MCOperand GetSymbolRef(const MachineOperand& MO, const MCSymbol* Symbol,
27 HexagonAsmPrinter& Printer) {
28 MCContext &MC = Printer.OutContext;
31 ME = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_None, MC);
33 if (!MO.isJTI() && MO.getOffset())
34 ME = MCBinaryExpr::CreateAdd(ME, MCConstantExpr::Create(MO.getOffset(), MC),
37 return (MCOperand::CreateExpr(ME));
40 // Create an MCInst from a MachineInstr
41 void llvm::HexagonLowerToMC(const MachineInstr* MI, MCInst& MCI,
42 HexagonAsmPrinter& AP) {
43 MCI.setOpcode(MI->getOpcode());
45 for (unsigned i = 0, e = MI->getNumOperands(); i < e; i++) {
46 const MachineOperand &MO = MI->getOperand(i);
49 switch (MO.getType()) {
52 llvm_unreachable("unknown operand type");
53 case MachineOperand::MO_Register:
54 // Ignore all implicit register operands.
55 if (MO.isImplicit()) continue;
56 MCO = MCOperand::CreateReg(MO.getReg());
58 case MachineOperand::MO_FPImmediate: {
59 APFloat Val = MO.getFPImm()->getValueAPF();
60 // FP immediates are used only when setting GPRs, so they may be dealt
61 // with like regular immediates from this point on.
62 MCO = MCOperand::CreateImm(*Val.bitcastToAPInt().getRawData());
65 case MachineOperand::MO_Immediate:
66 MCO = MCOperand::CreateImm(MO.getImm());
68 case MachineOperand::MO_MachineBasicBlock:
69 MCO = MCOperand::CreateExpr
70 (MCSymbolRefExpr::Create(MO.getMBB()->getSymbol(),
73 case MachineOperand::MO_GlobalAddress:
74 MCO = GetSymbolRef(MO, AP.Mang->getSymbol(MO.getGlobal()), AP);
76 case MachineOperand::MO_ExternalSymbol:
77 MCO = GetSymbolRef(MO, AP.GetExternalSymbolSymbol(MO.getSymbolName()),
80 case MachineOperand::MO_JumpTableIndex:
81 MCO = GetSymbolRef(MO, AP.GetJTISymbol(MO.getIndex()), AP);
83 case MachineOperand::MO_ConstantPoolIndex:
84 MCO = GetSymbolRef(MO, AP.GetCPISymbol(MO.getIndex()), AP);
86 case MachineOperand::MO_BlockAddress:
87 MCO = GetSymbolRef(MO, AP.GetBlockAddressSymbol(MO.getBlockAddress()),AP);