class MipsFunctionInfo : 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, two special bitmask directives must be emitted
- /// to help debugging, for CPU and FPU callee saved registers. Both need
- /// the negative offset from the final stack size and its higher registers
- /// location on the stack.
- int CPUTopSavedRegOff;
- int FPUTopSavedRegOff;
-
- /// 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 LowerFormalArguments 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
- // LowerFormalArguments, the Stack Pointer Offset calculation must be
- // postponed to emitPrologue.
- SmallVector<MipsFIHolder, 4> FnStoreVarArgs;
- bool HasStoreVarArgs;
-
+ MachineFunction& MF;
/// 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.
// 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.
+ mutable int DynAllocFI; // Frame index of dynamically allocated stack area.
+ unsigned MaxCallFrameSize;
+
public:
MipsFunctionInfo(MachineFunction& MF)
- : FPStackOffset(0), RAStackOffset(0), CPUTopSavedRegOff(0),
- FPUTopSavedRegOff(0), GPHolder(-1,-1), HasLoadArgs(false),
- HasStoreVarArgs(false), SRetReturnReg(0), GlobalBaseReg(0),
+ : MF(MF), SRetReturnReg(0), GlobalBaseReg(0),
VarArgsFrameIndex(0), InArgFIRange(std::make_pair(-1, 0)),
- OutArgFIRange(std::make_pair(-1, 0)), GPFI(0), HasCall(false)
+ OutArgFIRange(std::make_pair(-1, 0)), GPFI(0), DynAllocFI(0),
+ MaxCallFrameSize(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 getFPUTopSavedRegOff() const { return FPUTopSavedRegOff; }
- void setFPUTopSavedRegOff(int Off) { FPUTopSavedRegOff = Off; }
-
bool isInArgFI(int FI) const {
return FI <= InArgFIRange.first && FI >= InArgFIRange.second;
}
OutArgFIRange.second = LastFI;
}
- 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; }
+ 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; }
- bool hasLoadArgs() const { return HasLoadArgs; }
- bool hasStoreVarArgs() const { return HasStoreVarArgs; }
+ // The first call to this function creates a frame object for dynamically
+ // allocated stack area.
+ int getDynAllocFI() const {
+ if (!DynAllocFI)
+ DynAllocFI = MF.getFrameInfo()->CreateFixedObject(4, 0, true);
- 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 );
+ return DynAllocFI;
}
+ bool isDynAllocFI(int FI) const { return DynAllocFI && DynAllocFI == FI; }
unsigned getSRetReturnReg() const { return SRetReturnReg; }
void setSRetReturnReg(unsigned Reg) { SRetReturnReg = 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
projects / oota-llvm.git / blobdiff