-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;
+ 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.
+ unsigned SRetReturnReg;