MSP430RegisterInfo.cpp revision 3a4fbcfd330de43011550079f811d92f741a08a1 
1//===- MSP430RegisterInfo.cpp - MSP430 Register Information ---------------===//
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 MSP430 implementation of the TargetRegisterInfo class.
11//
12//===----------------------------------------------------------------------===//
13
14#define DEBUG_TYPE "msp430-reg-info"
15
16#include "MSP430.h"
17#include "MSP430RegisterInfo.h"
18#include "llvm/CodeGen/MachineFrameInfo.h"
19#include "llvm/CodeGen/MachineFunction.h"
20#include "llvm/Target/TargetMachine.h"
21#include "llvm/Target/TargetOptions.h"
22#include "llvm/ADT/BitVector.h"
23
24using namespace llvm;
25
26// FIXME: Provide proper call frame setup / destroy opcodes.
27MSP430RegisterInfo::MSP430RegisterInfo(const TargetInstrInfo &tii)
28  : MSP430GenRegisterInfo(MSP430::NOP, MSP430::NOP),
29    TII(tii) {}
30
31const unsigned*
32MSP430RegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
33  assert(0 && "Not implemented yet!");
34}
35
36const TargetRegisterClass* const*
37MSP430RegisterInfo::getCalleeSavedRegClasses(const MachineFunction *MF) const {
38  assert(0 && "Not implemented yet!");
39}
40
41BitVector
42MSP430RegisterInfo::getReservedRegs(const MachineFunction &MF) const {
43  BitVector Reserved(getNumRegs());
44
45  // Mark 4 special registers as reserved.
46  Reserved.set(MSP430::PC);
47  Reserved.set(MSP430::SP);
48  Reserved.set(MSP430::SR);
49  Reserved.set(MSP430::CG);
50
51  // Mark frame pointer as reserved if needed.
52  if (hasFP(MF))
53    Reserved.set(MSP430::FP);
54
55  return Reserved;
56}
57
58bool MSP430RegisterInfo::hasFP(const MachineFunction &MF) const {
59  return NoFramePointerElim || MF.getFrameInfo()->hasVarSizedObjects();
60}
61
62void
63MSP430RegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
64                                        int SPAdj, RegScavenger *RS) const {
65  assert(0 && "Not implemented yet!");
66}
67
68void MSP430RegisterInfo::emitPrologue(MachineFunction &MF) const {
69  assert(0 && "Not implemented yet!");
70}
71
72void MSP430RegisterInfo::emitEpilogue(MachineFunction &MF,
73                                      MachineBasicBlock &MBB) const {
74  assert(0 && "Not implemented yet!");
75}
76
77unsigned MSP430RegisterInfo::getRARegister() const {
78  assert(0 && "Not implemented yet!");
79}
80
81unsigned MSP430RegisterInfo::getFrameRegister(MachineFunction &MF) const {
82  assert(0 && "Not implemented yet!");
83}
84
85int MSP430RegisterInfo::getDwarfRegNum(unsigned RegNum, bool isEH) const {
86  assert(0 && "Not implemented yet!");
87}
88
89#include "MSP430GenRegisterInfo.inc"
90