mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-23 01:30:19 +00:00
b8d2f550b8
alignment and volatility information, such as loads and stores, to reduce the number of integer values added to the FoldingSetNodeID. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55058 91177308-0d34-0410-b5e6-96231b3b80d8
87 lines
3.1 KiB
C++
87 lines
3.1 KiB
C++
//==- llvm/CodeGen/MachineMemOperand.h - MachineMemOperand class -*- C++ -*-==//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains the declaration of the MachineMemOperand class, which is a
|
|
// description of a memory reference. It is used to help track dependencies
|
|
// in the backend.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_CODEGEN_MACHINEMEMOPERAND_H
|
|
#define LLVM_CODEGEN_MACHINEMEMOPERAND_H
|
|
|
|
namespace llvm {
|
|
|
|
class Value;
|
|
class FoldingSetNodeID;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// MachineMemOperand - A description of a memory reference used in the backend.
|
|
/// Instead of holding a StoreInst or LoadInst, this class holds the address
|
|
/// Value of the reference along with a byte size and offset. This allows it
|
|
/// to describe lowered loads and stores. Also, the special PseudoSourceValue
|
|
/// objects can be used to represent loads and stores to memory locations
|
|
/// that aren't explicit in the regular LLVM IR.
|
|
///
|
|
class MachineMemOperand {
|
|
int64_t Offset;
|
|
uint64_t Size;
|
|
const Value *V;
|
|
unsigned int Flags;
|
|
|
|
public:
|
|
/// Flags values. These may be or'd together.
|
|
enum MemOperandFlags {
|
|
/// The memory access reads data.
|
|
MOLoad = 1,
|
|
/// The memory access writes data.
|
|
MOStore = 2,
|
|
/// The memory access is volatile.
|
|
MOVolatile = 4
|
|
};
|
|
|
|
/// MachineMemOperand - Construct an MachineMemOperand object with the
|
|
/// specified address Value, flags, offset, size, and alignment.
|
|
MachineMemOperand(const Value *v, unsigned int f, int64_t o, uint64_t s,
|
|
unsigned int a);
|
|
|
|
/// getValue - Return the base address of the memory access.
|
|
/// Special values are PseudoSourceValue::FPRel, PseudoSourceValue::SPRel,
|
|
/// and the other PseudoSourceValue members which indicate references to
|
|
/// frame/stack pointer relative references and other special references.
|
|
const Value *getValue() const { return V; }
|
|
|
|
/// getFlags - Return the raw flags of the source value, \see MemOperandFlags.
|
|
unsigned int getFlags() const { return Flags & 7; }
|
|
|
|
/// getOffset - For normal values, this is a byte offset added to the base
|
|
/// address. For PseudoSourceValue::FPRel values, this is the FrameIndex
|
|
/// number.
|
|
int64_t getOffset() const { return Offset; }
|
|
|
|
/// getSize - Return the size in bytes of the memory reference.
|
|
uint64_t getSize() const { return Size; }
|
|
|
|
/// getAlignment - Return the minimum known alignment in bytes of the
|
|
/// memory reference.
|
|
unsigned int getAlignment() const { return (1u << (Flags >> 3)) >> 1; }
|
|
|
|
bool isLoad() const { return Flags & MOLoad; }
|
|
bool isStore() const { return Flags & MOStore; }
|
|
bool isVolatile() const { return Flags & MOVolatile; }
|
|
|
|
/// Profile - Gather unique data for the object.
|
|
///
|
|
void Profile(FoldingSetNodeID &ID) const;
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|