mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 11:42:57 +01:00
117 lines
3.9 KiB
C++
117 lines
3.9 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 "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:
|
|
/// Holds for each function where on the stack
|
|
/// the Frame Pointer must be saved
|
|
int FPStackOffset;
|
|
|
|
/// Holds for each function where on the stack
|
|
/// the Return Address must be saved
|
|
int RAStackOffset;
|
|
|
|
/// MipsFIHolder - Holds a FrameIndex and it's Stack Pointer Offset
|
|
struct MipsFIHolder {
|
|
|
|
int FI;
|
|
int SPOffset;
|
|
|
|
MipsFIHolder(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.
|
|
MipsFIHolder GPHolder;
|
|
|
|
// On LowerFORMAL_ARGUMENTS the stack size is unknown,
|
|
// so the Stack Pointer Offset calculation of "not in
|
|
// register arguments" must be postponed to emitPrologue.
|
|
SmallVector<MipsFIHolder, 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 LowerFORMAL_ARGUMENTS,
|
|
// the Stack Pointer Offset calculation must be
|
|
// postponed to emitPrologue.
|
|
SmallVector<MipsFIHolder, 4> FnStoreVarArgs;
|
|
bool HasStoreVarArgs;
|
|
|
|
public:
|
|
MipsFunctionInfo(MachineFunction& MF)
|
|
: FPStackOffset(0), RAStackOffset(0), GPHolder(-1,-1),
|
|
HasLoadArgs(false), HasStoreVarArgs(false)
|
|
{}
|
|
|
|
int getFPStackOffset() const { return FPStackOffset; }
|
|
void setFPStackOffset(int Off) { FPStackOffset = Off; }
|
|
|
|
int getRAStackOffset() const { return RAStackOffset; }
|
|
void setRAStackOffset(int Off) { RAStackOffset = 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; }
|
|
|
|
int getTopSavedRegOffset() const {
|
|
return (RAStackOffset > FPStackOffset) ?
|
|
(RAStackOffset) : (FPStackOffset);
|
|
}
|
|
|
|
bool hasLoadArgs() const { return HasLoadArgs; }
|
|
bool hasStoreVarArgs() const { return HasStoreVarArgs; }
|
|
|
|
void recordLoadArgsFI(int FI, int SPOffset) {
|
|
if (!HasLoadArgs) HasLoadArgs=true;
|
|
FnLoadArgs.push_back(MipsFIHolder(FI, SPOffset));
|
|
}
|
|
void recordStoreVarArgsFI(int FI, int SPOffset) {
|
|
if (!HasStoreVarArgs) HasStoreVarArgs=true;
|
|
FnStoreVarArgs.push_back(MipsFIHolder(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 );
|
|
}
|
|
|
|
};
|
|
|
|
} // end of namespace llvm
|
|
|
|
#endif // MIPS_MACHINE_FUNCTION_INFO_H
|