X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FCodeGen%2FMachineMemOperand.h;h=00a55b57f33473c34daccdbf3518104ecb9eddcd;hb=2c46deb1d07f4588ee70059cdd4c7145f81bc8e8;hp=b7e267dd13337d3428edb4236942b1e1beea51bc;hpb=4b2ebc19288491cb068f268c311d9fef0ec6a29f;p=oota-llvm.git

diff --git a/include/llvm/CodeGen/MachineMemOperand.h b/include/llvm/CodeGen/MachineMemOperand.h
index b7e267dd133..00a55b57f33 100644
--- a/include/llvm/CodeGen/MachineMemOperand.h
+++ b/include/llvm/CodeGen/MachineMemOperand.h
@@ -16,12 +16,61 @@
 #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
@@ -31,10 +80,11 @@ class raw_ostream;
 /// that aren't explicit in the regular LLVM IR.
 ///
 class MachineMemOperand {
-  int64_t Offset;
+  MachinePointerInfo PtrInfo;
   uint64_t Size;
-  const Value *V;
-  unsigned int Flags;
+  unsigned Flags;
+  const MDNode *TBAAInfo;
+  const MDNode *Ranges;
 
 public:
   /// Flags values. These may be or'd together.
@@ -44,13 +94,25 @@ 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,
+    // Target hints allow target passes to annotate memory operations.
+    MOTargetStartBit = 5,
+    MOTargetNumBits = 3,
+    // This is the number of bits we need to represent flags.
+    MOMaxBits = 8
   };
 
   /// MachineMemOperand - Construct an MachineMemOperand object with the
-  /// specified address Value, flags, offset, size, and base alignment.
-  MachineMemOperand(const Value *v, unsigned int f, int64_t o, uint64_t s,
-                    unsigned int base_alignment);
+  /// 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);
+
+  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.
@@ -59,15 +121,18 @@ public:
   /// 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 V; }
+  const Value *getValue() const { return PtrInfo.V; }
 
   /// getFlags - Return the raw flags of the source value, \see MemOperandFlags.
-  unsigned int getFlags() const { return Flags & 7; }
+  unsigned int getFlags() const { return Flags & ((1 << MOMaxBits) - 1); }
+
+  /// Bitwise OR the current flags with the given flags.
+  void setFlags(unsigned f) { Flags |= (f & ((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; }
@@ -78,11 +143,28 @@ public:
 
   /// getBaseAlignment - Return the minimum known alignment in bytes of the
   /// base address, without the offset.
-  uint64_t getBaseAlignment() const { return (1u << (Flags >> 3)) >> 1; }
+  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
@@ -92,7 +174,8 @@ public:
   /// 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) { V = NewSV; }
+  void setValue(const Value *NewSV) { PtrInfo.V = NewSV; }
+  void setOffset(int64_t NewOffset) { PtrInfo.Offset = NewOffset; }
 
   /// Profile - Gather unique data for the object.
   ///