Let callers decide the sub-register index on the def operand of rematerialized instru...

[oota-llvm.git] / include / llvm / Instruction.h

diff --git a/include/llvm/Instruction.h b/include/llvm/Instruction.h
index 0a39b08461d65615138e87eb538eedbf8e0cbd19..e06ae2d71120db8b59296d10d6dd93fc9b43fed4 100644 (file)
--- a/include/llvm/Instruction.h
+++ b/include/llvm/Instruction.h
@@ -20,6 +20,8 @@
 
 namespace llvm {
 
+class LLVMContext;
+
 template<typename ValueSubClass, typename ItemParentClass>
   class SymbolTableListTraits;
 
@@ -40,20 +42,12 @@ public:
   // Out of line virtual method, so the vtable, etc has a home.
   ~Instruction();
   
-  /// mayWriteToMemory - Return true if this instruction may modify memory.
-  ///
-  bool mayWriteToMemory() const;
-
-  /// mayReadFromMemory - Return true if this instruction may read memory.
-  ///
-  bool mayReadFromMemory() const;
-  
   /// clone() - Create a copy of 'this' instruction that is identical in all
   /// ways except the following:
   ///   * The instruction has no parent
   ///   * The instruction has no name
   ///
-  virtual Instruction *clone() const = 0;
+  virtual Instruction *clone(LLVMContext &Context) const = 0;
 
   /// isIdenticalTo - Return true if the specified instruction is exactly
   /// identical to the current one.  This means that all operands match and any
@@ -181,6 +175,24 @@ public:
   }
   static bool isTrapping(unsigned op);
 
+  /// mayWriteToMemory - Return true if this instruction may modify memory.
+  ///
+  bool mayWriteToMemory() const;
+
+  /// mayReadFromMemory - Return true if this instruction may read memory.
+  ///
+  bool mayReadFromMemory() const;
+
+  /// mayThrow - Return true if this instruction may throw an exception.
+  ///
+  bool mayThrow() const;
+
+  /// mayHaveSideEffects - Return true if the instruction may have side effects.
+  ///
+  bool mayHaveSideEffects() const {
+    return mayWriteToMemory() || mayThrow();
+  }
+
   /// Methods for support type inquiry through isa, cast, and dyn_cast:
   static inline bool classof(const Instruction *) { return true; }
   static inline bool classof(const Value *V) {