1 //===-- MipsMachineFunctionInfo.cpp - Private data used for Mips ----------===//
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 #include "MipsMachineFunction.h"
11 #include "MCTargetDesc/MipsBaseInfo.h"
12 #include "MipsInstrInfo.h"
13 #include "MipsSubtarget.h"
14 #include "llvm/CodeGen/MachineInstrBuilder.h"
15 #include "llvm/CodeGen/MachineRegisterInfo.h"
16 #include "llvm/IR/Function.h"
17 #include "llvm/Support/CommandLine.h"
22 FixGlobalBaseReg("mips-fix-global-base-reg", cl::Hidden, cl::init(true),
23 cl::desc("Always use $gp as the global base register."));
25 bool MipsFunctionInfo::globalBaseRegSet() const {
29 unsigned MipsFunctionInfo::getGlobalBaseReg() {
30 // Return if it has already been initialized.
34 const MipsSubtarget &ST = MF.getTarget().getSubtarget<MipsSubtarget>();
36 const TargetRegisterClass *RC;
37 if (ST.inMips16Mode())
38 RC=(const TargetRegisterClass*)&Mips::CPU16RegsRegClass;
41 (const TargetRegisterClass*)&Mips::GPR64RegClass :
42 (const TargetRegisterClass*)&Mips::GPR32RegClass;
43 return GlobalBaseReg = MF.getRegInfo().createVirtualRegister(RC);
46 bool MipsFunctionInfo::mips16SPAliasRegSet() const {
47 return Mips16SPAliasReg;
49 unsigned MipsFunctionInfo::getMips16SPAliasReg() {
50 // Return if it has already been initialized.
52 return Mips16SPAliasReg;
54 const TargetRegisterClass *RC;
55 RC=(const TargetRegisterClass*)&Mips::CPU16RegsRegClass;
56 return Mips16SPAliasReg = MF.getRegInfo().createVirtualRegister(RC);
59 void MipsFunctionInfo::createEhDataRegsFI() {
60 for (int I = 0; I < 4; ++I) {
61 const MipsSubtarget &ST = MF.getTarget().getSubtarget<MipsSubtarget>();
62 const TargetRegisterClass *RC = ST.isABI_N64() ?
63 &Mips::GPR64RegClass : &Mips::GPR32RegClass;
65 EhDataRegFI[I] = MF.getFrameInfo()->CreateStackObject(RC->getSize(),
66 RC->getAlignment(), false);
70 bool MipsFunctionInfo::isEhDataRegFI(int FI) const {
71 return CallsEhReturn && (FI == EhDataRegFI[0] || FI == EhDataRegFI[1]
72 || FI == EhDataRegFI[2] || FI == EhDataRegFI[3]);
75 void MipsFunctionInfo::anchor() { }