diff --git a/lib/AsmParser/LLParser.cpp b/lib/AsmParser/LLParser.cpp
index 45b88cc2a55..3b08ca18053 100644
--- a/lib/AsmParser/LLParser.cpp
+++ b/lib/AsmParser/LLParser.cpp
@@ -2351,11 +2351,28 @@ bool LLParser::ParseValID(ValID &ID, PerFunctionState *PFS) {
       if (NSW)
         return Error(ModifierLoc, "nsw only applies to integer operations");
     }
-    // API compatibility: Accept either integer or floating-point types with
-    // add, sub, and mul.
-    if (!Val0->getType()->isIntOrIntVectorTy() &&
-        !Val0->getType()->isFPOrFPVectorTy())
-      return Error(ID.Loc,"constexpr requires integer, fp, or vector operands");
+    // Check that the type is valid for the operator.
+    switch (Opc) {
+    case Instruction::Add:
+    case Instruction::Sub:
+    case Instruction::Mul:
+    case Instruction::UDiv:
+    case Instruction::SDiv:
+    case Instruction::URem:
+    case Instruction::SRem:
+      if (!Val0->getType()->isIntOrIntVectorTy())
+        return Error(ID.Loc, "constexpr requires integer operands");
+      break;
+    case Instruction::FAdd:
+    case Instruction::FSub:
+    case Instruction::FMul:
+    case Instruction::FDiv:
+    case Instruction::FRem:
+      if (!Val0->getType()->isFPOrFPVectorTy())
+        return Error(ID.Loc, "constexpr requires fp operands");
+      break;
+    default: llvm_unreachable("Unknown binary operator!");
+    }
     unsigned Flags = 0;
     if (NUW)   Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
     if (NSW)   Flags |= OverflowingBinaryOperator::NoSignedWrap;
@@ -3000,8 +3017,7 @@ int LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB,
       if (EatIfPresent(lltok::kw_nuw))
         NUW = true;
     }
-    // API compatibility: Accept either integer or floating-point types.
-    bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 0);
+    bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 1);
     if (!Result) {
       if (!Inst->getType()->isIntOrIntVectorTy()) {
         if (NUW)
diff --git a/lib/VMCore/Constants.cpp b/lib/VMCore/Constants.cpp
index d969dbb60d3..00b009401dc 100644
--- a/lib/VMCore/Constants.cpp
+++ b/lib/VMCore/Constants.cpp
@@ -1450,12 +1450,6 @@ Constant *ConstantExpr::getCompareTy(unsigned short predicate,
 
 Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2,
                             unsigned Flags) {
-  // API compatibility: Adjust integer opcodes to floating-point opcodes.
-  if (C1->getType()->isFPOrFPVectorTy()) {
-    if (Opcode == Instruction::Add) Opcode = Instruction::FAdd;
-    else if (Opcode == Instruction::Sub) Opcode = Instruction::FSub;
-    else if (Opcode == Instruction::Mul) Opcode = Instruction::FMul;
-  }
 #ifndef NDEBUG
   switch (Opcode) {
   case Instruction::Add:
@@ -1840,9 +1834,6 @@ Constant *ConstantExpr::getExtractValue(Constant *Agg,
 }
 
 Constant* ConstantExpr::getNeg(Constant* C) {
-  // API compatibility: Adjust integer opcodes to floating-point opcodes.
-  if (C->getType()->isFPOrFPVectorTy())
-    return getFNeg(C);
   assert(C->getType()->isIntOrIntVectorTy() &&
          "Cannot NEG a nonintegral value!");
   return get(Instruction::Sub,
diff --git a/lib/VMCore/Instructions.cpp b/lib/VMCore/Instructions.cpp
index d5c89c98634..f64b220c3fd 100644
--- a/lib/VMCore/Instructions.cpp
+++ b/lib/VMCore/Instructions.cpp
@@ -1562,43 +1562,29 @@ const Type* ExtractValueInst::getIndexedType(const Type *Agg,
 //                             BinaryOperator Class
 //===----------------------------------------------------------------------===//
 
-/// AdjustIType - Map Add, Sub, and Mul to FAdd, FSub, and FMul when the
-/// type is floating-point, to help provide compatibility with an older API.
-///
-static BinaryOperator::BinaryOps AdjustIType(BinaryOperator::BinaryOps iType,
-                                             const Type *Ty) {
-  // API compatibility: Adjust integer opcodes to floating-point opcodes.
-  if (Ty->isFPOrFPVectorTy()) {
-    if (iType == BinaryOperator::Add) iType = BinaryOperator::FAdd;
-    else if (iType == BinaryOperator::Sub) iType = BinaryOperator::FSub;
-    else if (iType == BinaryOperator::Mul) iType = BinaryOperator::FMul;
-  }
-  return iType;
-}
-
 BinaryOperator::BinaryOperator(BinaryOps iType, Value *S1, Value *S2,
                                const Type *Ty, const Twine &Name,
                                Instruction *InsertBefore)
-  : Instruction(Ty, AdjustIType(iType, Ty),
+  : Instruction(Ty, iType,
                 OperandTraits<BinaryOperator>::op_begin(this),
                 OperandTraits<BinaryOperator>::operands(this),
                 InsertBefore) {
   Op<0>() = S1;
   Op<1>() = S2;
-  init(AdjustIType(iType, Ty));
+  init(iType);
   setName(Name);
 }
 
 BinaryOperator::BinaryOperator(BinaryOps iType, Value *S1, Value *S2, 
                                const Type *Ty, const Twine &Name,
                                BasicBlock *InsertAtEnd)
-  : Instruction(Ty, AdjustIType(iType, Ty),
+  : Instruction(Ty, iType,
                 OperandTraits<BinaryOperator>::op_begin(this),
                 OperandTraits<BinaryOperator>::operands(this),
                 InsertAtEnd) {
   Op<0>() = S1;
   Op<1>() = S2;
-  init(AdjustIType(iType, Ty));
+  init(iType);
   setName(Name);
 }