-Revert parts of 84326 and 84411. Distinquishing between fixed and non-fixed

[oota-llvm.git] / include / llvm / CodeGen / PseudoSourceValue.h

diff --git a/include/llvm/CodeGen/PseudoSourceValue.h b/include/llvm/CodeGen/PseudoSourceValue.h
index 115e565b6b6cac5584ca5402ae025730876d5c18..aaf1f5f89864cc07063ac0b31002ff59b59ccc89 100644 (file)
--- a/include/llvm/CodeGen/PseudoSourceValue.h
+++ b/include/llvm/CodeGen/PseudoSourceValue.h
@@ -18,21 +18,31 @@
 
 namespace llvm {
   class MachineFrameInfo;
+  class raw_ostream;
 
   /// PseudoSourceValue - Special value supplied for machine level alias
   /// analysis. It indicates that the a memory access references the functions
   /// stack frame (e.g., a spill slot), below the stack frame (e.g., argument
   /// space), or constant pool.
   class PseudoSourceValue : public Value {
+  private:
+    /// printCustom - Implement printing for PseudoSourceValue. This is called
+    /// from Value::print or Value's operator<<.
+    ///
+    virtual void printCustom(raw_ostream &O) const;
+
   public:
     PseudoSourceValue();
 
-    virtual void print(std::ostream &OS) const;
-
-    /// isConstant - Test whether this PseudoSourceValue has a constant value.
+    /// isConstant - Test whether the memory pointed to by this
+    /// PseudoSourceValue has a constant value.
     ///
     virtual bool isConstant(const MachineFrameInfo *) const;
 
+    /// isAliased - Test whether the memory pointed to by this
+    /// PseudoSourceValue may also be pointed to by an LLVM IR Value.
+    virtual bool isAliased() const;
+
     /// classof - Methods for support type inquiry through isa, cast, and
     /// dyn_cast:
     ///
@@ -45,18 +55,21 @@ namespace llvm {
     /// e.g., a spill slot.
     static const PseudoSourceValue *getFixedStack(int FI);
 
-    /// A source value referencing the area below the stack frame of a function,
-    /// e.g., the argument space.
+    /// A pseudo source value referencing the area below the stack frame of
+    /// a function, e.g., the argument space.
     static const PseudoSourceValue *getStack();
 
-    /// A source value referencing the global offset table (or something the
-    /// like).
+    /// A pseudo source value referencing the global offset table
+    /// (or something the like).
     static const PseudoSourceValue *getGOT();
 
-    /// A SV referencing the constant pool
+    /// A pseudo source value referencing the constant pool. Since constant
+    /// pools are constant, this doesn't need to identify a specific constant
+    /// pool entry.
     static const PseudoSourceValue *getConstantPool();
 
-    /// A SV referencing the jump table
+    /// A pseudo source value referencing a jump table. Since jump tables are
+    /// constant, this doesn't need to identify a specific jump table.
     static const PseudoSourceValue *getJumpTable();
   };
 } // End llvm namespace