#ifndef MIPS_MACHINE_FUNCTION_INFO_H
#define MIPS_MACHINE_FUNCTION_INFO_H
+#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/VectorExtras.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
private:
/// Holds for each function where on the stack the Frame Pointer must be
- /// saved.
+ /// 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.
+ /// 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 {
/// 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.
+ /// 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
- // LowerFORMAL_ARGUMENTS, the Stack Pointer Offset calculation must be
+ // LowerFormalArguments, the Stack Pointer Offset calculation must be
// postponed to emitPrologue.
SmallVector<MipsFIHolder, 4> FnStoreVarArgs;
bool HasStoreVarArgs;
/// 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:
MipsFunctionInfo(MachineFunction& MF)
- : FPStackOffset(0), RAStackOffset(0), GPHolder(-1,-1), HasLoadArgs(false),
- HasStoreVarArgs(false), SRetReturnReg(0)
+ : FPStackOffset(0), RAStackOffset(0), CPUTopSavedRegOff(0),
+ FPUTopSavedRegOff(0), GPHolder(-1,-1), HasLoadArgs(false),
+ HasStoreVarArgs(false), SRetReturnReg(0), GlobalBaseReg(0),
+ VarArgsFrameIndex(0)
{}
int getFPStackOffset() const { return FPStackOffset; }
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; }
+
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 needGPSaveRestore() const { return GPHolder.SPOffset != -1; }
bool hasLoadArgs() const { return HasLoadArgs; }
bool hasStoreVarArgs() const { return HasStoreVarArgs; }
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