X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FCodeGen%2FMachineMemOperand.h;h=ddb127120f207c089b944a7a3be8affb812a8132;hb=b09c146b116359616f6cbd4c8b3328607e00ff42;hp=404de0689a03f9411529a1f01194526b023a4ca7;hpb=36b5c1338a03453ba1c110b120269ca972fb65a3;p=oota-llvm.git

diff --git a/include/llvm/CodeGen/MachineMemOperand.h b/include/llvm/CodeGen/MachineMemOperand.h
index 404de0689a0..ddb127120f2 100644
--- a/include/llvm/CodeGen/MachineMemOperand.h
+++ b/include/llvm/CodeGen/MachineMemOperand.h
@@ -13,13 +13,64 @@
 //
 //===----------------------------------------------------------------------===//
 
-#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
@@ -29,11 +80,11 @@ class Value;
 /// 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.
@@ -43,41 +94,90 @@ public:
     /// 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