Thumb2RegisterInfo.cpp revision 16c29b5f285f375be53dabaa73e3e91107485fe4
1//===- Thumb2RegisterInfo.cpp - Thumb-2 Register Information ----*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file contains the Thumb-2 implementation of the TargetRegisterInfo 11// class. 12// 13//===----------------------------------------------------------------------===// 14 15#include "ARM.h" 16#include "ARMAddressingModes.h" 17#include "ARMBaseInstrInfo.h" 18#include "ARMMachineFunctionInfo.h" 19#include "ARMSubtarget.h" 20#include "Thumb2InstrInfo.h" 21#include "Thumb2RegisterInfo.h" 22#include "llvm/Constants.h" 23#include "llvm/DerivedTypes.h" 24#include "llvm/Function.h" 25#include "llvm/LLVMContext.h" 26#include "llvm/CodeGen/MachineConstantPool.h" 27#include "llvm/CodeGen/MachineFrameInfo.h" 28#include "llvm/CodeGen/MachineFunction.h" 29#include "llvm/CodeGen/MachineInstrBuilder.h" 30#include "llvm/CodeGen/MachineLocation.h" 31#include "llvm/CodeGen/MachineRegisterInfo.h" 32#include "llvm/Target/TargetMachine.h" 33#include "llvm/ADT/BitVector.h" 34#include "llvm/ADT/SmallVector.h" 35#include "llvm/Support/ErrorHandling.h" 36using namespace llvm; 37 38Thumb2RegisterInfo::Thumb2RegisterInfo(const ARMBaseInstrInfo &tii, 39 const ARMSubtarget &sti) 40 : ARMBaseRegisterInfo(tii, sti) { 41} 42 43/// emitLoadConstPool - Emits a load from constpool to materialize the 44/// specified immediate. 45void Thumb2RegisterInfo::emitLoadConstPool(MachineBasicBlock &MBB, 46 MachineBasicBlock::iterator &MBBI, 47 DebugLoc dl, 48 unsigned DestReg, unsigned SubIdx, 49 int Val, 50 ARMCC::CondCodes Pred, 51 unsigned PredReg) const { 52 MachineFunction &MF = *MBB.getParent(); 53 MachineConstantPool *ConstantPool = MF.getConstantPool(); 54 const Constant *C = ConstantInt::get( 55 Type::getInt32Ty(MBB.getParent()->getFunction()->getContext()), Val); 56 unsigned Idx = ConstantPool->getConstantPoolIndex(C, 4); 57 58 BuildMI(MBB, MBBI, dl, TII.get(ARM::t2LDRpci)) 59 .addReg(DestReg, getDefRegState(true), SubIdx) 60 .addConstantPoolIndex(Idx).addImm((int64_t)ARMCC::AL).addReg(0); 61} 62