llvm-6502/lib/Target/Mips/MipsMachineFunction.h
Akira Hatanaka f15f498507 Change initial value of MaxCallFrameSize. MipsFI::getMaxCallFrameSize() should
return 0 if there are no function calls made. 



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132065 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-25 17:52:48 +00:00

99 lines
3.5 KiB
C++

//===-- MipsMachineFunctionInfo.h - Private data used for Mips ----*- C++ -*-=//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares the Mips specific subclass of MachineFunctionInfo.
//
//===----------------------------------------------------------------------===//
#ifndef MIPS_MACHINE_FUNCTION_INFO_H
#define MIPS_MACHINE_FUNCTION_INFO_H
#include <utility>
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/VectorExtras.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
namespace llvm {
/// MipsFunctionInfo - This class is derived from MachineFunction private
/// Mips target-specific information for each MachineFunction.
class MipsFunctionInfo : public MachineFunctionInfo {
private:
/// SRetReturnReg - Some subtargets require that sret lowering includes
/// returning the value of the returned struct in a register. This field
/// holds the virtual register into which the sret argument is passed.
unsigned SRetReturnReg;
/// GlobalBaseReg - keeps track of the virtual register initialized for
/// use as the global base register. This is used for PIC in some PIC
/// relocation models.
unsigned GlobalBaseReg;
/// VarArgsFrameIndex - FrameIndex for start of varargs area.
int VarArgsFrameIndex;
// Range of frame object indices.
// InArgFIRange: Range of indices of all frame objects created during call to
// LowerFormalArguments.
// OutArgFIRange: Range of indices of all frame objects created during call to
// LowerCall except for the frame object for restoring $gp.
std::pair<int, int> InArgFIRange, OutArgFIRange;
int GPFI; // Index of the frame object for restoring $gp
bool HasCall; // True if function has a function call.
unsigned MaxCallFrameSize;
public:
MipsFunctionInfo(MachineFunction& MF)
: SRetReturnReg(0), GlobalBaseReg(0),
VarArgsFrameIndex(0), InArgFIRange(std::make_pair(-1, 0)),
OutArgFIRange(std::make_pair(-1, 0)), GPFI(0), HasCall(false),
MaxCallFrameSize(0)
{}
bool isInArgFI(int FI) const {
return FI <= InArgFIRange.first && FI >= InArgFIRange.second;
}
void setLastInArgFI(int FI) { InArgFIRange.second = FI; }
bool isOutArgFI(int FI) const {
return FI <= OutArgFIRange.first && FI >= OutArgFIRange.second;
}
void extendOutArgFIRange(int FirstFI, int LastFI) {
if (!OutArgFIRange.second)
// this must be the first time this function was called.
OutArgFIRange.first = FirstFI;
OutArgFIRange.second = LastFI;
}
int getGPFI() const { return GPFI; }
void setGPFI(int FI) { GPFI = FI; }
bool needGPSaveRestore() const { return getGPFI(); }
bool isGPFI(int FI) const { return GPFI && GPFI == FI; }
unsigned getSRetReturnReg() const { return SRetReturnReg; }
void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
unsigned getGlobalBaseReg() const { return GlobalBaseReg; }
void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; }
int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
bool hasCall() const { return HasCall; }
void setHasCall() { HasCall = true; }
unsigned getMaxCallFrameSize() const { return MaxCallFrameSize; }
void setMaxCallFrameSize(unsigned S) { MaxCallFrameSize = S; }
};
} // end of namespace llvm
#endif // MIPS_MACHINE_FUNCTION_INFO_H