mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-30 05:29:47 +00:00
MachineFunctionInfo subclasses. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101634 91177308-0d34-0410-b5e6-96231b3b80d8
143 lines
5.4 KiB
C++
143 lines
5.4 KiB
C++
//===-- MBlazeMachineFunctionInfo.h - Private data ----------------*- 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 MBlaze specific subclass of MachineFunctionInfo.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef MBLAZE_MACHINE_FUNCTION_INFO_H
|
|
#define MBLAZE_MACHINE_FUNCTION_INFO_H
|
|
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "llvm/ADT/VectorExtras.h"
|
|
#include "llvm/CodeGen/MachineFunction.h"
|
|
#include "llvm/CodeGen/MachineFrameInfo.h"
|
|
|
|
namespace llvm {
|
|
|
|
/// MBlazeFunctionInfo - This class is derived from MachineFunction private
|
|
/// MBlaze target-specific information for each MachineFunction.
|
|
class MBlazeFunctionInfo : public MachineFunctionInfo {
|
|
|
|
private:
|
|
/// Holds for each function where on the stack the Frame Pointer must be
|
|
/// saved. This is used on Prologue and Epilogue to emit FP save/restore
|
|
int FPStackOffset;
|
|
|
|
/// Holds for each function where on the stack the Return Address must be
|
|
/// saved. This is used on Prologue and Epilogue to emit RA save/restore
|
|
int RAStackOffset;
|
|
|
|
/// At each function entry a special bitmask directive must be emitted
|
|
/// to help in debugging CPU callee saved registers. It needs a negative
|
|
/// offset from the final stack size and its higher register location on
|
|
/// the stack.
|
|
int CPUTopSavedRegOff;
|
|
|
|
/// MBlazeFIHolder - Holds a FrameIndex and it's Stack Pointer Offset
|
|
struct MBlazeFIHolder {
|
|
|
|
int FI;
|
|
int SPOffset;
|
|
|
|
MBlazeFIHolder(int FrameIndex, int StackPointerOffset)
|
|
: FI(FrameIndex), SPOffset(StackPointerOffset) {}
|
|
};
|
|
|
|
/// When PIC is used the GP must be saved on the stack on the function
|
|
/// prologue and must be reloaded from this stack location after every
|
|
/// call. A reference to its stack location and frame index must be kept
|
|
/// to be used on emitPrologue and processFunctionBeforeFrameFinalized.
|
|
MBlazeFIHolder GPHolder;
|
|
|
|
/// On LowerFormalArguments the stack size is unknown, so the Stack
|
|
/// Pointer Offset calculation of "not in register arguments" must be
|
|
/// postponed to emitPrologue.
|
|
SmallVector<MBlazeFIHolder, 16> FnLoadArgs;
|
|
bool HasLoadArgs;
|
|
|
|
// When VarArgs, we must write registers back to caller stack, preserving
|
|
// on register arguments. Since the stack size is unknown on
|
|
// LowerFormalArguments, the Stack Pointer Offset calculation must be
|
|
// postponed to emitPrologue.
|
|
SmallVector<MBlazeFIHolder, 4> FnStoreVarArgs;
|
|
bool HasStoreVarArgs;
|
|
|
|
/// 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;
|
|
|
|
public:
|
|
MBlazeFunctionInfo(MachineFunction& MF)
|
|
: FPStackOffset(0), RAStackOffset(0), CPUTopSavedRegOff(0),
|
|
GPHolder(-1,-1), HasLoadArgs(false), HasStoreVarArgs(false),
|
|
SRetReturnReg(0), GlobalBaseReg(0), VarArgsFrameIndex(0)
|
|
{}
|
|
|
|
int getFPStackOffset() const { return FPStackOffset; }
|
|
void setFPStackOffset(int Off) { FPStackOffset = Off; }
|
|
|
|
int getRAStackOffset() const { return RAStackOffset; }
|
|
void setRAStackOffset(int Off) { RAStackOffset = Off; }
|
|
|
|
int getCPUTopSavedRegOff() const { return CPUTopSavedRegOff; }
|
|
void setCPUTopSavedRegOff(int Off) { CPUTopSavedRegOff = Off; }
|
|
|
|
int getGPStackOffset() const { return GPHolder.SPOffset; }
|
|
int getGPFI() const { return GPHolder.FI; }
|
|
void setGPStackOffset(int Off) { GPHolder.SPOffset = Off; }
|
|
void setGPFI(int FI) { GPHolder.FI = FI; }
|
|
bool needGPSaveRestore() const { return GPHolder.SPOffset != -1; }
|
|
|
|
bool hasLoadArgs() const { return HasLoadArgs; }
|
|
bool hasStoreVarArgs() const { return HasStoreVarArgs; }
|
|
|
|
void recordLoadArgsFI(int FI, int SPOffset) {
|
|
if (!HasLoadArgs) HasLoadArgs=true;
|
|
FnLoadArgs.push_back(MBlazeFIHolder(FI, SPOffset));
|
|
}
|
|
void recordStoreVarArgsFI(int FI, int SPOffset) {
|
|
if (!HasStoreVarArgs) HasStoreVarArgs=true;
|
|
FnStoreVarArgs.push_back(MBlazeFIHolder(FI, SPOffset));
|
|
}
|
|
|
|
void adjustLoadArgsFI(MachineFrameInfo *MFI) const {
|
|
if (!hasLoadArgs()) return;
|
|
for (unsigned i = 0, e = FnLoadArgs.size(); i != e; ++i)
|
|
MFI->setObjectOffset( FnLoadArgs[i].FI, FnLoadArgs[i].SPOffset );
|
|
}
|
|
void adjustStoreVarArgsFI(MachineFrameInfo *MFI) const {
|
|
if (!hasStoreVarArgs()) return;
|
|
for (unsigned i = 0, e = FnStoreVarArgs.size(); i != e; ++i)
|
|
MFI->setObjectOffset( FnStoreVarArgs[i].FI, FnStoreVarArgs[i].SPOffset );
|
|
}
|
|
|
|
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; }
|
|
};
|
|
|
|
} // end of namespace llvm
|
|
|
|
#endif // MBLAZE_MACHINE_FUNCTION_INFO_H
|