llvm-6502/lib/Target/ARM/Thumb2RegisterInfo.cpp
Bill Wendling 57148c166a Don't cache the instruction and register info from the TargetMachine, because
the internals of TargetMachine could change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183488 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-07 05:54:19 +00:00

53 lines
2.0 KiB
C++

//===-- Thumb2RegisterInfo.cpp - Thumb-2 Register Information -------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the Thumb-2 implementation of the TargetRegisterInfo
// class.
//
//===----------------------------------------------------------------------===//
#include "Thumb2RegisterInfo.h"
#include "ARM.h"
#include "ARMBaseInstrInfo.h"
#include "ARMSubtarget.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
using namespace llvm;
Thumb2RegisterInfo::Thumb2RegisterInfo(const ARMSubtarget &sti)
: ARMBaseRegisterInfo(sti) {
}
/// emitLoadConstPool - Emits a load from constpool to materialize the
/// specified immediate.
void
Thumb2RegisterInfo::emitLoadConstPool(MachineBasicBlock &MBB,
MachineBasicBlock::iterator &MBBI,
DebugLoc dl,
unsigned DestReg, unsigned SubIdx,
int Val,
ARMCC::CondCodes Pred, unsigned PredReg,
unsigned MIFlags) const {
MachineFunction &MF = *MBB.getParent();
const TargetInstrInfo &TII = *MF.getTarget().getInstrInfo();
MachineConstantPool *ConstantPool = MF.getConstantPool();
const Constant *C = ConstantInt::get(
Type::getInt32Ty(MBB.getParent()->getFunction()->getContext()), Val);
unsigned Idx = ConstantPool->getConstantPoolIndex(C, 4);
BuildMI(MBB, MBBI, dl, TII.get(ARM::t2LDRpci))
.addReg(DestReg, getDefRegState(true), SubIdx)
.addConstantPoolIndex(Idx).addImm((int64_t)ARMCC::AL).addReg(0)
.setMIFlags(MIFlags);
}