mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-02 07:11:49 +00:00
1069fbdd2f
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27574 91177308-0d34-0410-b5e6-96231b3b80d8
65 lines
2.4 KiB
C++
65 lines
2.4 KiB
C++
//===- MRegisterInfo.cpp - Target Register Information Implementation -----===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file was developed by the LLVM research group and is distributed under
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the MRegisterInfo interface.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Target/MRegisterInfo.h"
|
|
|
|
#include "llvm/CodeGen/MachineFunction.h"
|
|
#include "llvm/CodeGen/MachineFrameInfo.h"
|
|
#include "llvm/CodeGen/MachineLocation.h"
|
|
|
|
using namespace llvm;
|
|
|
|
MRegisterInfo::MRegisterInfo(const TargetRegisterDesc *D, unsigned NR,
|
|
regclass_iterator RCB, regclass_iterator RCE,
|
|
int CFSO, int CFDO)
|
|
: Desc(D), NumRegs(NR), RegClassBegin(RCB), RegClassEnd(RCE) {
|
|
assert(NumRegs < FirstVirtualRegister &&
|
|
"Target has too many physical registers!");
|
|
|
|
CallFrameSetupOpcode = CFSO;
|
|
CallFrameDestroyOpcode = CFDO;
|
|
}
|
|
|
|
MRegisterInfo::~MRegisterInfo() {}
|
|
|
|
std::vector<bool> MRegisterInfo::getAllocatableSet(MachineFunction &MF) const {
|
|
std::vector<bool> Allocatable(NumRegs);
|
|
for (MRegisterInfo::regclass_iterator I = regclass_begin(),
|
|
E = regclass_end(); I != E; ++I) {
|
|
const TargetRegisterClass *RC = *I;
|
|
for (TargetRegisterClass::iterator I = RC->allocation_order_begin(MF),
|
|
E = RC->allocation_order_end(MF); I != E; ++I)
|
|
Allocatable[*I] = true;
|
|
}
|
|
return Allocatable;
|
|
}
|
|
|
|
/// getLocation - This method should return the actual location of a frame
|
|
/// variable given the frame index. The location is returned in ML.
|
|
/// Subclasses should override this method for special handling of frame
|
|
/// variables and then call MRegisterInfo::getLocation for the default action.
|
|
void MRegisterInfo::getLocation(MachineFunction &MF, unsigned Index,
|
|
MachineLocation &ML) const {
|
|
MachineFrameInfo *MFI = MF.getFrameInfo();
|
|
ML.set(getFrameRegister(MF),
|
|
MFI->getObjectOffset(Index) + MFI->getStackSize());
|
|
}
|
|
|
|
/// getInitialFrameState - Returns a list of machine moves that are assumed
|
|
/// on entry to a function.
|
|
void
|
|
MRegisterInfo::getInitialFrameState(std::vector<MachineMove *> &Moves) const {
|
|
// Default is to do nothing.
|
|
}
|
|
|