//
//===----------------------------------------------------------------------===//
-#ifndef LLVM_CODEGEN_MEMOPERAND_H
-#define LLVM_CODEGEN_MEMOPERAND_H
+#ifndef LLVM_CODEGEN_MACHINEMEMOPERAND_H
+#define LLVM_CODEGEN_MACHINEMEMOPERAND_H
+
+#include "llvm/Support/DataTypes.h"
namespace llvm {
class Value;
+class FoldingSetNodeID;
+class MDNode;
+class raw_ostream;
+
+/// MachinePointerInfo - This class contains a discriminated union of
+/// information about pointers in memory operands, relating them back to LLVM IR
+/// or to virtual locations (such as frame indices) that are exposed during
+/// codegen.
+struct MachinePointerInfo {
+ /// V - This is the IR pointer value for the access, or it is null if unknown.
+ /// If this is null, then the access is to a pointer in the default address
+ /// space.
+ const Value *V;
+
+ /// Offset - This is an offset from the base Value*.
+ int64_t Offset;
+
+ explicit MachinePointerInfo(const Value *v = 0, int64_t offset = 0)
+ : V(v), Offset(offset) {}
+
+ MachinePointerInfo getWithOffset(int64_t O) const {
+ if (V == 0) return MachinePointerInfo(0, 0);
+ return MachinePointerInfo(V, Offset+O);
+ }
+
+ /// getAddrSpace - Return the LLVM IR address space number that this pointer
+ /// points into.
+ unsigned getAddrSpace() const;
+
+ /// getConstantPool - Return a MachinePointerInfo record that refers to the
+ /// constant pool.
+ static MachinePointerInfo getConstantPool();
+ /// getFixedStack - Return a MachinePointerInfo record that refers to the
+ /// the specified FrameIndex.
+ static MachinePointerInfo getFixedStack(int FI, int64_t offset = 0);
+
+ /// getJumpTable - Return a MachinePointerInfo record that refers to a
+ /// jump table entry.
+ static MachinePointerInfo getJumpTable();
+
+ /// getGOT - Return a MachinePointerInfo record that refers to a
+ /// GOT entry.
+ static MachinePointerInfo getGOT();
+
+ /// getStack - stack pointer relative access.
+ static MachinePointerInfo getStack(int64_t Offset);
+};
+
+
//===----------------------------------------------------------------------===//
/// MachineMemOperand - A description of a memory reference used in the backend.
/// Instead of holding a StoreInst or LoadInst, this class holds the address
/// that aren't explicit in the regular LLVM IR.
///
class MachineMemOperand {
- const Value *V;
- unsigned int Flags;
- int64_t Offset;
+ MachinePointerInfo PtrInfo;
uint64_t Size;
- unsigned int Alignment;
+ unsigned Flags;
+ const MDNode *TBAAInfo;
+ const MDNode *Ranges;
public:
/// Flags values. These may be or'd together.
/// The memory access writes data.
MOStore = 2,
/// The memory access is volatile.
- MOVolatile = 4
+ MOVolatile = 4,
+ /// The memory access is non-temporal.
+ MONonTemporal = 8,
+ /// The memory access is invariant.
+ MOInvariant = 16,
+ // This is the number of bits we need to represent flags.
+ MOMaxBits = 5
};
/// 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)
- : V(v), Flags(f), Offset(o), Size(s), Alignment(a) {}
+ /// specified PtrInfo, flags, size, and base alignment.
+ MachineMemOperand(MachinePointerInfo PtrInfo, unsigned flags, uint64_t s,
+ unsigned base_alignment, const MDNode *TBAAInfo = 0,
+ const MDNode *Ranges = 0);
- /// 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; }
+ const MachinePointerInfo &getPointerInfo() const { return PtrInfo; }
+
+ /// getValue - Return the base address of the memory access. This may either
+ /// be a normal LLVM IR Value, or one of the special values used in CodeGen.
+ /// Special values are those obtained via
+ /// PseudoSourceValue::getFixedStack(int), PseudoSourceValue::getStack, and
+ /// other PseudoSourceValue member functions which return objects which stand
+ /// for frame/stack pointer relative references and other special references
+ /// which are not representable in the high-level IR.
+ const Value *getValue() const { return PtrInfo.V; }
/// getFlags - Return the raw flags of the source value, \see MemOperandFlags.
- unsigned int getFlags() const { return Flags; }
+ unsigned int getFlags() const { return Flags & ((1 << MOMaxBits) - 1); }
/// 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; }
+ int64_t getOffset() const { return PtrInfo.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 Alignment; }
+ /// actual memory reference.
+ uint64_t getAlignment() const;
+
+ /// getBaseAlignment - Return the minimum known alignment in bytes of the
+ /// base address, without the offset.
+ uint64_t getBaseAlignment() const { return (1u << (Flags >> MOMaxBits)) >> 1; }
+
+ /// getTBAAInfo - Return the TBAA tag for the memory reference.
+ const MDNode *getTBAAInfo() const { return TBAAInfo; }
+
+ /// getRanges - Return the range tag for the memory reference.
+ const MDNode *getRanges() const { return Ranges; }
bool isLoad() const { return Flags & MOLoad; }
bool isStore() const { return Flags & MOStore; }
bool isVolatile() const { return Flags & MOVolatile; }
+ bool isNonTemporal() const { return Flags & MONonTemporal; }
+ bool isInvariant() const { return Flags & MOInvariant; }
+
+ /// isUnordered - Returns true if this memory operation doesn't have any
+ /// ordering constraints other than normal aliasing. Volatile and atomic
+ /// memory operations can't be reordered.
+ ///
+ /// Currently, we don't model the difference between volatile and atomic
+ /// operations. They should retain their ordering relative to all memory
+ /// operations.
+ bool isUnordered() const { return !isVolatile(); }
+
+ /// refineAlignment - Update this MachineMemOperand to reflect the alignment
+ /// of MMO, if it has a greater alignment. This must only be used when the
+ /// new alignment applies to all users of this MachineMemOperand.
+ void refineAlignment(const MachineMemOperand *MMO);
+
+ /// setValue - Change the SourceValue for this MachineMemOperand. This
+ /// should only be used when an object is being relocated and all references
+ /// to it are being updated.
+ void setValue(const Value *NewSV) { PtrInfo.V = NewSV; }
+ void setOffset(int64_t NewOffset) { PtrInfo.Offset = NewOffset; }
+
+ /// Profile - Gather unique data for the object.
+ ///
+ void Profile(FoldingSetNodeID &ID) const;
};
+raw_ostream &operator<<(raw_ostream &OS, const MachineMemOperand &MRO);
+
} // End llvm namespace
#endif
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