llvm-6502/lib/Target/PowerPC/PPCInstrBuilder.h

56 lines
2.0 KiB
C
Raw Normal View History

//===-- PPCInstrBuilder.h - Aides for building PPC insts --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file exposes functions that may be used with BuildMI from the
// MachineInstrBuilder.h file to simplify generating frame and constant pool
// references.
//
// For reference, the order of operands for memory references is:
// (Operand), Dest Reg, Base Reg, and either Reg Index or Immediate
// Displacement.
//
//===----------------------------------------------------------------------===//
#ifndef POWERPC_INSTRBUILDER_H
#define POWERPC_INSTRBUILDER_H
#include "llvm/CodeGen/MachineInstrBuilder.h"
namespace llvm {
/// addFrameReference - This function is used to add a reference to the base of
/// an abstract object on the stack frame of the current function. This
/// reference has base register as the FrameIndex offset until it is resolved.
/// This allows a constant offset to be specified as well...
///
inline const MachineInstrBuilder&
addFrameReference(const MachineInstrBuilder &MIB, int FI, int Offset = 0,
bool mem = true) {
if (mem)
return MIB.addImm(Offset).addFrameIndex(FI);
else
return MIB.addFrameIndex(FI).addImm(Offset);
}
/// addConstantPoolReference - This function is used to add a reference to the
/// base of a constant value spilled to the per-function constant pool. The
/// reference has base register ConstantPoolIndex offset which is retained until
/// either machine code emission or assembly output. This allows an optional
/// offset to be added as well.
///
inline const MachineInstrBuilder&
addConstantPoolReference(const MachineInstrBuilder &MIB, unsigned CPI,
int Offset = 0) {
return MIB.addImm(Offset).addConstantPoolIndex(CPI);
}
} // End llvm namespace
#endif