X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FOperator.h;h=541f13d859175444e8b66c18457869f9a074ebe8;hb=819c4f365fe2bf9be75faafa667fb22366dabaf5;hp=4da19219d2f4fbbfa724e377b593d38e47c29abb;hpb=ca178908c8dc2303a1fb54a8a93bab0f0b964e11;p=oota-llvm.git

diff --git a/include/llvm/Operator.h b/include/llvm/Operator.h
index 4da19219d2f..541f13d8591 100644
--- a/include/llvm/Operator.h
+++ b/include/llvm/Operator.h
@@ -61,7 +61,8 @@ public:
 };
 
 /// OverflowingBinaryOperator - Utility class for integer arithmetic operators
-/// which may exhibit overflow - Add, Sub, and Mul.
+/// which may exhibit overflow - Add, Sub, and Mul. It does not include SDiv,
+/// despite that operator having the potential for overflow.
 ///
 class OverflowingBinaryOperator : public Operator {
 public:
@@ -100,9 +101,9 @@ public:
   }
 };
 
-/// UDivOperator - An Operator with opcode Instruction::UDiv.
+/// SDivOperator - An Operator with opcode Instruction::SDiv.
 ///
-class UDivOperator : public Operator {
+class SDivOperator : public Operator {
 public:
   /// isExact - Test whether this division is known to be exact, with
   /// zero remainder.
@@ -114,12 +115,12 @@ public:
   }
 
   // Methods for support type inquiry through isa, cast, and dyn_cast:
-  static inline bool classof(const UDivOperator *) { return true; }
+  static inline bool classof(const SDivOperator *) { return true; }
   static inline bool classof(const ConstantExpr *CE) {
-    return CE->getOpcode() == Instruction::UDiv;
+    return CE->getOpcode() == Instruction::SDiv;
   }
   static inline bool classof(const Instruction *I) {
-    return I->getOpcode() == Instruction::UDiv;
+    return I->getOpcode() == Instruction::SDiv;
   }
   static inline bool classof(const Value *V) {
     return (isa<Instruction>(V) && classof(cast<Instruction>(V))) ||
@@ -127,6 +128,65 @@ public:
   }
 };
 
+class GEPOperator : public Operator {
+public:
+  inline op_iterator       idx_begin()       { return op_begin()+1; }
+  inline const_op_iterator idx_begin() const { return op_begin()+1; }
+  inline op_iterator       idx_end()         { return op_end(); }
+  inline const_op_iterator idx_end()   const { return op_end(); }
+
+  Value *getPointerOperand() {
+    return getOperand(0);
+  }
+  const Value *getPointerOperand() const {
+    return getOperand(0);
+  }
+  static unsigned getPointerOperandIndex() {
+    return 0U;                      // get index for modifying correct operand
+  }
+
+  /// getPointerOperandType - Method to return the pointer operand as a
+  /// PointerType.
+  const PointerType *getPointerOperandType() const {
+    return reinterpret_cast<const PointerType*>(getPointerOperand()->getType());
+  }
+
+  unsigned getNumIndices() const {  // Note: always non-negative
+    return getNumOperands() - 1;
+  }
+
+  bool hasIndices() const {
+    return getNumOperands() > 1;
+  }
+
+  /// hasAllZeroIndices - Return true if all of the indices of this GEP are
+  /// zeros.  If so, the result pointer and the first operand have the same
+  /// value, just potentially different types.
+  bool hasAllZeroIndices() const {
+    for (const_op_iterator I = idx_begin(), E = idx_end(); I != E; ++I) {
+      if (Constant *C = dyn_cast<Constant>(I))
+        if (C->isNullValue())
+          continue;
+      return false;
+    }
+    return true;
+  }
+
+  // Methods for support type inquiry through isa, cast, and dyn_cast:
+  static inline bool classof(const GEPOperator *) { return true; }
+  static inline bool classof(const GetElementPtrInst *) { return true; }
+  static inline bool classof(const ConstantExpr *CE) {
+    return CE->getOpcode() == Instruction::GetElementPtr;
+  }
+  static inline bool classof(const Instruction *I) {
+    return I->getOpcode() == Instruction::GetElementPtr;
+  }
+  static inline bool classof(const Value *V) {
+    return isa<GetElementPtrInst>(V) ||
+           (isa<ConstantExpr>(V) && classof(cast<ConstantExpr>(V)));
+  }
+};
+
 } // End llvm namespace
 
 #endif