Even more passes being LLVMContext'd.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74781 91177308-0d34-0410-b5e6-96231b3b80d8

9 files changed, 235 insertions, 181 deletions

diff --git a/include/llvm/LLVMContext.h b/include/llvm/LLVMContext.h
index 76b0ac8..efe12cc 100644
--- a/include/llvm/LLVMContext.h
+++ b/include/llvm/LLVMContext.h
@@ -178,7 +178,7 @@ public:
                               const std::vector<Constant*>& V);
   Constant* getConstantVector(const std::vector<Constant*>& V);
   Constant* getConstantVector(Constant* const* Vals, unsigned NumVals);
-  ConstantVector* getConstantVectorAllOnes(const VectorType* Ty);
+  ConstantVector* getConstantVectorAllOnesValue(const VectorType* Ty);
   
   // MDNode accessors
   MDNode* getMDNode(Value* const* Vals, unsigned NumVals);
diff --git a/lib/Transforms/Scalar/MemCpyOptimizer.cpp b/lib/Transforms/Scalar/MemCpyOptimizer.cpp
index 5cf0518..3c7a5ab 100644
--- a/lib/Transforms/Scalar/MemCpyOptimizer.cpp
+++ b/lib/Transforms/Scalar/MemCpyOptimizer.cpp
@@ -16,6 +16,7 @@
 #include "llvm/Transforms/Scalar.h"
 #include "llvm/IntrinsicInst.h"
 #include "llvm/Instructions.h"
+#include "llvm/LLVMContext.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/Analysis/Dominators.h"
@@ -35,7 +36,7 @@ STATISTIC(NumMemSetInfer, "Number of memsets inferred");
 /// true for all i8 values obviously, but is also true for i32 0, i32 -1,
 /// i16 0xF0F0, double 0.0 etc.  If the value can't be handled with a repeated
 /// byte store (e.g. i16 0x1234), return null.
-static Value *isBytewiseValue(Value *V) {
+static Value *isBytewiseValue(Value *V, LLVMContext* Context) {
   // All byte-wide stores are splatable, even of arbitrary variables.
   if (V->getType() == Type::Int8Ty) return V;
   
@@ -43,9 +44,9 @@ static Value *isBytewiseValue(Value *V) {
   // corresponding integer value is "byteable".  An important case is 0.0. 
   if (ConstantFP *CFP = dyn_cast<ConstantFP>(V)) {
     if (CFP->getType() == Type::FloatTy)
-      V = ConstantExpr::getBitCast(CFP, Type::Int32Ty);
+      V = Context->getConstantExprBitCast(CFP, Type::Int32Ty);
     if (CFP->getType() == Type::DoubleTy)
-      V = ConstantExpr::getBitCast(CFP, Type::Int64Ty);
+      V = Context->getConstantExprBitCast(CFP, Type::Int64Ty);
     // Don't handle long double formats, which have strange constraints.
   }
   
@@ -68,7 +69,7 @@ static Value *isBytewiseValue(Value *V) {
         if (Val != Val2)
           return 0;
       }
-      return ConstantInt::get(Val);
+      return Context->getConstantInt(Val);
     }
   }
   
@@ -345,7 +346,7 @@ bool MemCpyOpt::processStore(StoreInst *SI, BasicBlock::iterator& BBI) {
   // Ensure that the value being stored is something that can be memset'able a
   // byte at a time like "0" or "-1" or any width, as well as things like
   // 0xA0A0A0A0 and 0.0.
-  Value *ByteVal = isBytewiseValue(SI->getOperand(0));
+  Value *ByteVal = isBytewiseValue(SI->getOperand(0), Context);
   if (!ByteVal)
     return false;
 
@@ -384,7 +385,7 @@ bool MemCpyOpt::processStore(StoreInst *SI, BasicBlock::iterator& BBI) {
     if (NextStore->isVolatile()) break;
     
     // Check to see if this stored value is of the same byte-splattable value.
-    if (ByteVal != isBytewiseValue(NextStore->getOperand(0)))
+    if (ByteVal != isBytewiseValue(NextStore->getOperand(0), Context))
       break;
 
     // Check to see if this store is to a constant offset from the start ptr.
@@ -438,15 +439,15 @@ bool MemCpyOpt::processStore(StoreInst *SI, BasicBlock::iterator& BBI) {
     StartPtr = Range.StartPtr;
   
     // Cast the start ptr to be i8* as memset requires.
-    const Type *i8Ptr = PointerType::getUnqual(Type::Int8Ty);
+    const Type *i8Ptr = Context->getPointerTypeUnqual(Type::Int8Ty);
     if (StartPtr->getType() != i8Ptr)
       StartPtr = new BitCastInst(StartPtr, i8Ptr, StartPtr->getNameStart(),
                                  InsertPt);
   
     Value *Ops[] = {
       StartPtr, ByteVal,   // Start, value
-      ConstantInt::get(Type::Int64Ty, Range.End-Range.Start),  // size
-      ConstantInt::get(Type::Int32Ty, Range.Alignment)   // align
+      Context->getConstantInt(Type::Int64Ty, Range.End-Range.Start),  // size
+      Context->getConstantInt(Type::Int32Ty, Range.Alignment)   // align
     };
     Value *C = CallInst::Create(MemSetF, Ops, Ops+4, "", InsertPt);
     DEBUG(cerr << "Replace stores:\n";
diff --git a/lib/Transforms/Scalar/Reassociate.cpp b/lib/Transforms/Scalar/Reassociate.cpp
index 293cf92..fa60a9d 100644
--- a/lib/Transforms/Scalar/Reassociate.cpp
+++ b/lib/Transforms/Scalar/Reassociate.cpp
@@ -27,6 +27,7 @@
 #include "llvm/Function.h"
 #include "llvm/Instructions.h"
 #include "llvm/IntrinsicInst.h"
+#include "llvm/LLVMContext.h"
 #include "llvm/Pass.h"
 #include "llvm/Assembly/Writer.h"
 #include "llvm/Support/CFG.h"
@@ -198,8 +199,9 @@ static BinaryOperator *isReassociableOp(Value *V, unsigned Opcode) {
 /// LowerNegateToMultiply - Replace 0-X with X*-1.
 ///
 static Instruction *LowerNegateToMultiply(Instruction *Neg,
-                              std::map<AssertingVH<>, unsigned> &ValueRankMap) {
-  Constant *Cst = ConstantInt::getAllOnesValue(Neg->getType());
+                              std::map<AssertingVH<>, unsigned> &ValueRankMap,
+                              LLVMContext* Context) {
+  Constant *Cst = Context->getConstantIntAllOnesValue(Neg->getType());
 
   Instruction *Res = BinaryOperator::CreateMul(Neg->getOperand(1), Cst, "",Neg);
   ValueRankMap.erase(Neg);
@@ -263,11 +265,13 @@ void Reassociate::LinearizeExprTree(BinaryOperator *I,
   // transform them into multiplies by -1 so they can be reassociated.
   if (I->getOpcode() == Instruction::Mul) {
     if (!LHSBO && LHS->hasOneUse() && BinaryOperator::isNeg(LHS)) {
-      LHS = LowerNegateToMultiply(cast<Instruction>(LHS), ValueRankMap);
+      LHS = LowerNegateToMultiply(cast<Instruction>(LHS),
+                                  ValueRankMap, Context);
       LHSBO = isReassociableOp(LHS, Opcode);
     }
     if (!RHSBO && RHS->hasOneUse() && BinaryOperator::isNeg(RHS)) {
-      RHS = LowerNegateToMultiply(cast<Instruction>(RHS), ValueRankMap);
+      RHS = LowerNegateToMultiply(cast<Instruction>(RHS),
+                                  ValueRankMap, Context);
       RHSBO = isReassociableOp(RHS, Opcode);
     }
   }
@@ -280,8 +284,8 @@ void Reassociate::LinearizeExprTree(BinaryOperator *I,
       Ops.push_back(ValueEntry(getRank(RHS), RHS));
       
       // Clear the leaves out.
-      I->setOperand(0, UndefValue::get(I->getType()));
-      I->setOperand(1, UndefValue::get(I->getType()));
+      I->setOperand(0, Context->getUndef(I->getType()));
+      I->setOperand(1, Context->getUndef(I->getType()));
       return;
     } else {
       // Turn X+(Y+Z) -> (Y+Z)+X
@@ -316,7 +320,7 @@ void Reassociate::LinearizeExprTree(BinaryOperator *I,
   Ops.push_back(ValueEntry(getRank(RHS), RHS));
   
   // Clear the RHS leaf out.
-  I->setOperand(1, UndefValue::get(I->getType()));
+  I->setOperand(1, Context->getUndef(I->getType()));
 }
 
 // RewriteExprTree - Now that the operands for this expression tree are
@@ -453,15 +457,17 @@ static Instruction *BreakUpSubtract(Instruction *Sub,
 /// by one, change this into a multiply by a constant to assist with further
 /// reassociation.
 static Instruction *ConvertShiftToMul(Instruction *Shl, 
-                              std::map<AssertingVH<>, unsigned> &ValueRankMap) {
+                              std::map<AssertingVH<>, unsigned> &ValueRankMap,
+                              LLVMContext* Context) {
   // If an operand of this shift is a reassociable multiply, or if the shift
   // is used by a reassociable multiply or add, turn into a multiply.
   if (isReassociableOp(Shl->getOperand(0), Instruction::Mul) ||
       (Shl->hasOneUse() && 
        (isReassociableOp(Shl->use_back(), Instruction::Mul) ||
         isReassociableOp(Shl->use_back(), Instruction::Add)))) {
-    Constant *MulCst = ConstantInt::get(Shl->getType(), 1);
-    MulCst = ConstantExpr::getShl(MulCst, cast<Constant>(Shl->getOperand(1)));
+    Constant *MulCst = Context->getConstantInt(Shl->getType(), 1);
+    MulCst =
+        Context->getConstantExprShl(MulCst, cast<Constant>(Shl->getOperand(1)));
     
     Instruction *Mul = BinaryOperator::CreateMul(Shl->getOperand(0), MulCst,
                                                  "", Shl);
@@ -561,7 +567,7 @@ Value *Reassociate::OptimizeExpression(BinaryOperator *I,
   if (Constant *V1 = dyn_cast<Constant>(Ops[Ops.size()-2].Op))
     if (Constant *V2 = dyn_cast<Constant>(Ops.back().Op)) {
       Ops.pop_back();
-      Ops.back().Op = ConstantExpr::get(Opcode, V1, V2);
+      Ops.back().Op = Context->getConstantExpr(Opcode, V1, V2);
       return OptimizeExpression(I, Ops);
     }
 
@@ -617,10 +623,10 @@ Value *Reassociate::OptimizeExpression(BinaryOperator *I,
         if (FoundX != i) {
           if (Opcode == Instruction::And) {   // ...&X&~X = 0
             ++NumAnnihil;
-            return Constant::getNullValue(X->getType());
+            return Context->getNullValue(X->getType());
           } else if (Opcode == Instruction::Or) {   // ...|X|~X = -1
             ++NumAnnihil;
-            return ConstantInt::getAllOnesValue(X->getType());
+            return Context->getConstantIntAllOnesValue(X->getType());
           }
         }
       }
@@ -639,7 +645,7 @@ Value *Reassociate::OptimizeExpression(BinaryOperator *I,
           assert(Opcode == Instruction::Xor);
           if (e == 2) {
             ++NumAnnihil;
-            return Constant::getNullValue(Ops[0].Op->getType());
+            return Context->getNullValue(Ops[0].Op->getType());
           }
           // ... X^X -> ...
           Ops.erase(Ops.begin()+i, Ops.begin()+i+2);
@@ -664,7 +670,7 @@ Value *Reassociate::OptimizeExpression(BinaryOperator *I,
           // Remove X and -X from the operand list.
           if (Ops.size() == 2) {
             ++NumAnnihil;
-            return Constant::getNullValue(X->getType());
+            return Context->getNullValue(X->getType());
           } else {
             Ops.erase(Ops.begin()+i);
             if (i < FoundX)
@@ -779,7 +785,7 @@ void Reassociate::ReassociateBB(BasicBlock *BB) {
     Instruction *BI = BBI++;
     if (BI->getOpcode() == Instruction::Shl &&
         isa<ConstantInt>(BI->getOperand(1)))
-      if (Instruction *NI = ConvertShiftToMul(BI, ValueRankMap)) {
+      if (Instruction *NI = ConvertShiftToMul(BI, ValueRankMap, Context)) {
         MadeChange = true;
         BI = NI;
       }
@@ -801,7 +807,7 @@ void Reassociate::ReassociateBB(BasicBlock *BB) {
         if (isReassociableOp(BI->getOperand(1), Instruction::Mul) &&
             (!BI->hasOneUse() ||
              !isReassociableOp(BI->use_back(), Instruction::Mul))) {
-          BI = LowerNegateToMultiply(BI, ValueRankMap);
+          BI = LowerNegateToMultiply(BI, ValueRankMap, Context);
           MadeChange = true;
         }
       }
diff --git a/lib/Transforms/Scalar/Reg2Mem.cpp b/lib/Transforms/Scalar/Reg2Mem.cpp
index 46b2952..ac95d25 100644
--- a/lib/Transforms/Scalar/Reg2Mem.cpp
+++ b/lib/Transforms/Scalar/Reg2Mem.cpp
@@ -21,6 +21,7 @@
 #include "llvm/Transforms/Utils/Local.h"
 #include "llvm/Pass.h"
 #include "llvm/Function.h"
+#include "llvm/LLVMContext.h"
 #include "llvm/Module.h"
 #include "llvm/BasicBlock.h"
 #include "llvm/Instructions.h"
@@ -68,7 +69,7 @@ namespace {
 
         CastInst *AllocaInsertionPoint =
           CastInst::Create(Instruction::BitCast,
-                           Constant::getNullValue(Type::Int32Ty), Type::Int32Ty,
+                           Context->getNullValue(Type::Int32Ty), Type::Int32Ty,
                            "reg2mem alloca point", I);
 
         // Find the escaped instructions. But don't create stack slots for
diff --git a/lib/Transforms/Scalar/SCCP.cpp b/lib/Transforms/Scalar/SCCP.cpp
index 3deee54..f0bc127 100644
--- a/lib/Transforms/Scalar/SCCP.cpp
+++ b/lib/Transforms/Scalar/SCCP.cpp
@@ -27,6 +27,7 @@
 #include "llvm/Constants.h"
 #include "llvm/DerivedTypes.h"
 #include "llvm/Instructions.h"
+#include "llvm/LLVMContext.h"
 #include "llvm/Pass.h"
 #include "llvm/Analysis/ConstantFolding.h"
 #include "llvm/Analysis/ValueTracking.h"
@@ -138,6 +139,7 @@ public:
 /// Constant Propagation.
 ///
 class SCCPSolver : public InstVisitor<SCCPSolver> {
+  LLVMContext* Context;
   DenseSet<BasicBlock*> BBExecutable;// The basic blocks that are executable
   std::map<Value*, LatticeVal> ValueState;  // The state each value is in.
 
@@ -177,6 +179,7 @@ class SCCPSolver : public InstVisitor<SCCPSolver> {
   typedef std::pair<BasicBlock*, BasicBlock*> Edge;
   DenseSet<Edge> KnownFeasibleEdges;
 public:
+  void setContext(LLVMContext* C) { Context = C; }
 
   /// MarkBlockExecutable - This method can be used by clients to mark all of
   /// the blocks that are known to be intrinsically live in the processed unit.
@@ -437,7 +440,7 @@ void SCCPSolver::getFeasibleSuccessors(TerminatorInst &TI,
         Succs[0] = Succs[1] = true;
       } else if (BCValue.isConstant()) {
         // Constant condition variables mean the branch can only go a single way
-        Succs[BCValue.getConstant() == ConstantInt::getFalse()] = true;
+        Succs[BCValue.getConstant() == Context->getConstantIntFalse()] = true;
       }
     }
   } else if (isa<InvokeInst>(&TI)) {
@@ -482,7 +485,7 @@ bool SCCPSolver::isEdgeFeasible(BasicBlock *From, BasicBlock *To) {
 
         // Constant condition variables mean the branch can only go a single way
         return BI->getSuccessor(BCValue.getConstant() ==
-                                       ConstantInt::getFalse()) == To;
+                                       Context->getConstantIntFalse()) == To;
       }
       return false;
     }
@@ -663,7 +666,7 @@ void SCCPSolver::visitCastInst(CastInst &I) {
   if (VState.isOverdefined())          // Inherit overdefinedness of operand
     markOverdefined(&I);
   else if (VState.isConstant())        // Propagate constant value
-    markConstant(&I, ConstantExpr::getCast(I.getOpcode(), 
+    markConstant(&I, Context->getConstantExprCast(I.getOpcode(), 
                                            VState.getConstant(), I.getType()));
 }
 
@@ -806,11 +809,12 @@ void SCCPSolver::visitBinaryOperator(Instruction &I) {
         if (NonOverdefVal->isUndefined()) {
           // Could annihilate value.
           if (I.getOpcode() == Instruction::And)
-            markConstant(IV, &I, Constant::getNullValue(I.getType()));
+            markConstant(IV, &I, Context->getNullValue(I.getType()));
           else if (const VectorType *PT = dyn_cast<VectorType>(I.getType()))
-            markConstant(IV, &I, ConstantVector::getAllOnesValue(PT));
+            markConstant(IV, &I, Context->getConstantVectorAllOnesValue(PT));
           else
-            markConstant(IV, &I, ConstantInt::getAllOnesValue(I.getType()));
+            markConstant(IV, &I,
+                         Context->getConstantIntAllOnesValue(I.getType()));
           return;
         } else {
           if (I.getOpcode() == Instruction::And) {
@@ -854,7 +858,8 @@ void SCCPSolver::visitBinaryOperator(Instruction &I) {
               Result.markOverdefined();
               break;  // Cannot fold this operation over the PHI nodes!
             } else if (In1.isConstant() && In2.isConstant()) {
-              Constant *V = ConstantExpr::get(I.getOpcode(), In1.getConstant(),
+              Constant *V =
+                     Context->getConstantExpr(I.getOpcode(), In1.getConstant(),
                                               In2.getConstant());
               if (Result.isUndefined())
                 Result.markConstant(V);
@@ -902,7 +907,8 @@ void SCCPSolver::visitBinaryOperator(Instruction &I) {
 
     markOverdefined(IV, &I);
   } else if (V1State.isConstant() && V2State.isConstant()) {
-    markConstant(IV, &I, ConstantExpr::get(I.getOpcode(), V1State.getConstant(),
+    markConstant(IV, &I,
+                Context->getConstantExpr(I.getOpcode(), V1State.getConstant(),
                                            V2State.getConstant()));
   }
 }
@@ -939,7 +945,7 @@ void SCCPSolver::visitCmpInst(CmpInst &I) {
               Result.markOverdefined();
               break;  // Cannot fold this operation over the PHI nodes!
             } else if (In1.isConstant() && In2.isConstant()) {
-              Constant *V = ConstantExpr::getCompare(I.getPredicate(), 
+              Constant *V = Context->getConstantExprCompare(I.getPredicate(), 
                                                      In1.getConstant(), 
                                                      In2.getConstant());
               if (Result.isUndefined())
@@ -988,7 +994,7 @@ void SCCPSolver::visitCmpInst(CmpInst &I) {
 
     markOverdefined(IV, &I);
   } else if (V1State.isConstant() && V2State.isConstant()) {
-    markConstant(IV, &I, ConstantExpr::getCompare(I.getPredicate(), 
+    markConstant(IV, &I, Context->getConstantExprCompare(I.getPredicate(), 
                                                   V1State.getConstant(), 
                                                   V2State.getConstant()));
   }
@@ -1090,7 +1096,7 @@ void SCCPSolver::visitGetElementPtrInst(GetElementPtrInst &I) {
   Constant *Ptr = Operands[0];
   Operands.erase(Operands.begin());  // Erase the pointer from idx list...
 
-  markConstant(IV, &I, ConstantExpr::getGetElementPtr(Ptr, &Operands[0],
+  markConstant(IV, &I, Context->getConstantExprGetElementPtr(Ptr, &Operands[0],
                                                       Operands.size()));
 }
 
@@ -1124,7 +1130,7 @@ void SCCPSolver::visitLoadInst(LoadInst &I) {
     if (isa<ConstantPointerNull>(Ptr) && 
         cast<PointerType>(Ptr->getType())->getAddressSpace() == 0) {
       // load null -> null
-      markConstant(IV, &I, Constant::getNullValue(I.getType()));
+      markConstant(IV, &I, Context->getNullValue(I.getType()));
       return;
     }
 
@@ -1365,21 +1371,22 @@ bool SCCPSolver::ResolvedUndefsIn(Function &F) {
         // to be handled here, because we don't know whether the top part is 1's
         // or 0's.
         assert(Op0LV.isUndefined());
-        markForcedConstant(LV, I, Constant::getNullValue(ITy));
+        markForcedConstant(LV, I, Context->getNullValue(ITy));
         return true;
       case Instruction::Mul:
       case Instruction::And:
         // undef * X -> 0.   X could be zero.
         // undef & X -> 0.   X could be zero.
-        markForcedConstant(LV, I, Constant::getNullValue(ITy));
+        markForcedConstant(LV, I, Context->getNullValue(ITy));
         return true;
 
       case Instruction::Or:
         // undef | X -> -1.   X could be -1.
         if (const VectorType *PTy = dyn_cast<VectorType>(ITy))
-          markForcedConstant(LV, I, ConstantVector::getAllOnesValue(PTy));
+          markForcedConstant(LV, I,
+                             Context->getConstantVectorAllOnesValue(PTy));
         else          
-          markForcedConstant(LV, I, ConstantInt::getAllOnesValue(ITy));
+          markForcedConstant(LV, I, Context->getConstantIntAllOnesValue(ITy));
         return true;
 
       case Instruction::SDiv:
@@ -1392,7 +1399,7 @@ bool SCCPSolver::ResolvedUndefsIn(Function &F) {
         
         // undef / X -> 0.   X could be maxint.
         // undef % X -> 0.   X could be 1.
-        markForcedConstant(LV, I, Constant::getNullValue(ITy));
+        markForcedConstant(LV, I, Context->getNullValue(ITy));
         return true;
         
       case Instruction::AShr:
@@ -1413,7 +1420,7 @@ bool SCCPSolver::ResolvedUndefsIn(Function &F) {
         
         // X >> undef -> 0.  X could be 0.
         // X << undef -> 0.  X could be 0.
-        markForcedConstant(LV, I, Constant::getNullValue(ITy));
+        markForcedConstant(LV, I, Context->getNullValue(ITy));
         return true;
       case Instruction::Select:
         // undef ? X : Y  -> X or Y.  There could be commonality between X/Y.
@@ -1476,7 +1483,7 @@ bool SCCPSolver::ResolvedUndefsIn(Function &F) {
     // as undef, then further analysis could think the undef went another way
     // leading to an inconsistent set of conclusions.
     if (BranchInst *BI = dyn_cast<BranchInst>(TI)) {
-      BI->setCondition(ConstantInt::getFalse());
+      BI->setCondition(Context->getConstantIntFalse());
     } else {
       SwitchInst *SI = cast<SwitchInst>(TI);
       SI->setCondition(SI->getCaseValue(1));
@@ -1526,6 +1533,7 @@ FunctionPass *llvm::createSCCPPass() {
 bool SCCP::runOnFunction(Function &F) {
   DOUT << "SCCP on function '" << F.getNameStart() << "'\n";
   SCCPSolver Solver;
+  Solver.setContext(Context);
 
   // Mark the first block of the function as being executable.
   Solver.MarkBlockExecutable(F.begin());
@@ -1565,7 +1573,7 @@ bool SCCP::runOnFunction(Function &F) {
         Instruction *I = Insts.back();
         Insts.pop_back();
         if (!I->use_empty())
-          I->replaceAllUsesWith(UndefValue::get(I->getType()));
+          I->replaceAllUsesWith(Context->getUndef(I->getType()));
         BB->getInstList().erase(I);
         MadeChanges = true;
         ++NumInstRemoved;
@@ -1585,7 +1593,7 @@ bool SCCP::runOnFunction(Function &F) {
           continue;
         
         Constant *Const = IV.isConstant()
-          ? IV.getConstant() : UndefValue::get(Inst->getType());
+          ? IV.getConstant() : Context->getUndef(Inst->getType());
         DOUT << "  Constant: " << *Const << " = " << *Inst;
 
         // Replaces all of the uses of a variable with uses of the constant.
@@ -1701,7 +1709,7 @@ bool IPSCCP::runOnModule(Module &M) {
         LatticeVal &IV = Values[AI];
         if (IV.isConstant() || IV.isUndefined()) {
           Constant *CST = IV.isConstant() ?
-            IV.getConstant() : UndefValue::get(AI->getType());
+            IV.getConstant() : Context->getUndef(AI->getType());
           DOUT << "***  Arg " << *AI << " = " << *CST <<"\n";
 
           // Replaces all of the uses of a variable with uses of the
@@ -1726,7 +1734,7 @@ bool IPSCCP::runOnModule(Module &M) {
           Instruction *I = Insts.back();
           Insts.pop_back();
           if (!I->use_empty())
-            I->replaceAllUsesWith(UndefValue::get(I->getType()));
+            I->replaceAllUsesWith(Context->getUndef(I->getType()));
           BB->getInstList().erase(I);
           MadeChanges = true;
           ++IPNumInstRemoved;
@@ -1738,7 +1746,7 @@ bool IPSCCP::runOnModule(Module &M) {
             TI->getSuccessor(i)->removePredecessor(BB);
         }
         if (!TI->use_empty())
-          TI->replaceAllUsesWith(UndefValue::get(TI->getType()));
+          TI->replaceAllUsesWith(Context->getUndef(TI->getType()));
         BB->getInstList().erase(TI);
 
         if (&*BB != &F->front())
@@ -1757,7 +1765,7 @@ bool IPSCCP::runOnModule(Module &M) {
             continue;
           
           Constant *Const = IV.isConstant()
-            ? IV.getConstant() : UndefValue::get(Inst->getType());
+            ? IV.getConstant() : Context->getUndef(Inst->getType());
           DOUT << "  Constant: " << *Const << " = " << *Inst;
 
           // Replaces all of the uses of a variable with uses of the
@@ -1831,7 +1839,7 @@ bool IPSCCP::runOnModule(Module &M) {
       for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB)
         if (ReturnInst *RI = dyn_cast<ReturnInst>(BB->getTerminator()))
           if (!isa<UndefValue>(RI->getOperand(0)))
-            RI->setOperand(0, UndefValue::get(F->getReturnType()));
+            RI->setOperand(0, Context->getUndef(F->getReturnType()));
     }
 
   // If we infered constant or undef values for globals variables, we can delete
diff --git a/lib/Transforms/Scalar/ScalarReplAggregates.cpp b/lib/Transforms/Scalar/ScalarReplAggregates.cpp
index d89790c..109fb90 100644
--- a/lib/Transforms/Scalar/ScalarReplAggregates.cpp
+++ b/lib/Transforms/Scalar/ScalarReplAggregates.cpp
@@ -27,6 +27,7 @@
 #include "llvm/GlobalVariable.h"
 #include "llvm/Instructions.h"
 #include "llvm/IntrinsicInst.h"
+#include "llvm/LLVMContext.h"
 #include "llvm/Pass.h"
 #include "llvm/Analysis/Dominators.h"
 #include "llvm/Target/TargetData.h"
@@ -240,7 +241,8 @@ bool SROA::performScalarRepl(Function &F) {
       DOUT << "Found alloca equal to global: " << *AI;
       DOUT << "  memcpy = " << *TheCopy;
       Constant *TheSrc = cast<Constant>(TheCopy->getOperand(2));
-      AI->replaceAllUsesWith(ConstantExpr::getBitCast(TheSrc, AI->getType()));
+      AI->replaceAllUsesWith(
+                        Context->getConstantExprBitCast(TheSrc, AI->getType()));
       TheCopy->eraseFromParent();  // Don't mutate the global.
       AI->eraseFromParent();
       ++NumGlobals;
@@ -305,7 +307,7 @@ bool SROA::performScalarRepl(Function &F) {
         DOUT << "CONVERT TO SCALAR INTEGER: " << *AI << "\n";
         
         // Create and insert the integer alloca.
-        const Type *NewTy = IntegerType::get(AllocaSize*8);
+        const Type *NewTy = Context->getIntegerType(AllocaSize*8);
         NewAI = new AllocaInst(NewTy, 0, "", AI->getParent()->begin());
         ConvertUsesToScalar(AI, NewAI, 0);
       }
@@ -369,7 +371,7 @@ void SROA::DoScalarReplacement(AllocationInst *AI,
     //   %insert = insertvalue { i32, i32 } %insert.0, i32 %load.1, 1 
     // (Also works for arrays instead of structs)
     if (LoadInst *LI = dyn_cast<LoadInst>(User)) {
-      Value *Insert = UndefValue::get(LI->getType());
+      Value *Insert = Context->getUndef(LI->getType());
       for (unsigned i = 0, e = ElementAllocas.size(); i != e; ++i) {
         Value *Load = new LoadInst(ElementAllocas[i], "load", LI);
         Insert = InsertValueInst::Create(Insert, Load, i, "insert", LI);
@@ -416,7 +418,7 @@ void SROA::DoScalarReplacement(AllocationInst *AI,
       // expanded itself once the worklist is rerun.
       //
       SmallVector<Value*, 8> NewArgs;
-      NewArgs.push_back(Constant::getNullValue(Type::Int32Ty));
+      NewArgs.push_back(Context->getNullValue(Type::Int32Ty));
       NewArgs.append(GEPI->op_begin()+3, GEPI->op_end());
       RepValue = GetElementPtrInst::Create(AllocaToUse, NewArgs.begin(),
                                            NewArgs.end(), "", GEPI);
@@ -529,7 +531,7 @@ void SROA::isSafeUseOfAllocation(Instruction *User, AllocationInst *AI,
 
   // The GEP is not safe to transform if not of the form "GEP <ptr>, 0, <cst>".
   if (I == E ||
-      I.getOperand() != Constant::getNullValue(I.getOperand()->getType())) {
+      I.getOperand() != Context->getNullValue(I.getOperand()->getType())) {
     return MarkUnsafe(Info);
   }
 
@@ -762,7 +764,7 @@ void SROA::RewriteMemIntrinUserOfAlloca(MemIntrinsic *MI, Instruction *BCInst,
   const Type *BytePtrTy = MI->getRawDest()->getType();
   bool SROADest = MI->getRawDest() == BCInst;
   
-  Constant *Zero = Constant::getNullValue(Type::Int32Ty);
+  Constant *Zero = Context->getNullValue(Type::Int32Ty);
 
   for (unsigned i = 0, e = NewElts.size(); i != e; ++i) {
     // If this is a memcpy/memmove, emit a GEP of the other element address.
@@ -770,7 +772,7 @@ void SROA::RewriteMemIntrinUserOfAlloca(MemIntrinsic *MI, Instruction *BCInst,
     unsigned OtherEltAlign = MemAlignment;
     
     if (OtherPtr) {
-      Value *Idx[2] = { Zero, ConstantInt::get(Type::Int32Ty, i) };
+      Value *Idx[2] = { Zero, Context->getConstantInt(Type::Int32Ty, i) };
       OtherElt = GetElementPtrInst::Create(OtherPtr, Idx, Idx + 2,
                                            OtherPtr->getNameStr()+"."+utostr(i),
                                            MI);
@@ -817,7 +819,7 @@ void SROA::RewriteMemIntrinUserOfAlloca(MemIntrinsic *MI, Instruction *BCInst,
       Constant *StoreVal;
       if (ConstantInt *CI = dyn_cast<ConstantInt>(MI->getOperand(2))) {
         if (CI->isZero()) {
-          StoreVal = Constant::getNullValue(EltTy);  // 0.0, null, 0, <0,0>
+          StoreVal = Context->getNullValue(EltTy);  // 0.0, null, 0, <0,0>
         } else {
           // If EltTy is a vector type, get the element type.
           const Type *ValTy = EltTy->getScalarType();
@@ -833,18 +835,18 @@ void SROA::RewriteMemIntrinUserOfAlloca(MemIntrinsic *MI, Instruction *BCInst,
           }
           
           // Convert the integer value to the appropriate type.
-          StoreVal = ConstantInt::get(TotalVal);
+          StoreVal = Context->getConstantInt(TotalVal);
           if (isa<PointerType>(ValTy))
-            StoreVal = ConstantExpr::getIntToPtr(StoreVal, ValTy);
+            StoreVal = Context->getConstantExprIntToPtr(StoreVal, ValTy);
           else if (ValTy->isFloatingPoint())
-            StoreVal = ConstantExpr::getBitCast(StoreVal, ValTy);
+            StoreVal = Context->getConstantExprBitCast(StoreVal, ValTy);
           assert(StoreVal->getType() == ValTy && "Type mismatch!");
           
           // If the requested value was a vector constant, create it.
           if (EltTy != ValTy) {
             unsigned NumElts = cast<VectorType>(ValTy)->getNumElements();
             SmallVector<Constant*, 16> Elts(NumElts, StoreVal);
-            StoreVal = ConstantVector::get(&Elts[0], NumElts);
+            StoreVal = Context->getConstantVector(&Elts[0], NumElts);
           }
         }
         new StoreInst(StoreVal, EltPtr, MI);
@@ -870,15 +872,15 @@ void SROA::RewriteMemIntrinUserOfAlloca(MemIntrinsic *MI, Instruction *BCInst,
       Value *Ops[] = {
         SROADest ? EltPtr : OtherElt,  // Dest ptr
         SROADest ? OtherElt : EltPtr,  // Src ptr
-        ConstantInt::get(MI->getOperand(3)->getType(), EltSize), // Size
-        ConstantInt::get(Type::Int32Ty, OtherEltAlign)  // Align
+        Context->getConstantInt(MI->getOperand(3)->getType(), EltSize), // Size
+        Context->getConstantInt(Type::Int32Ty, OtherEltAlign)  // Align
       };
       CallInst::Create(TheFn, Ops, Ops + 4, "", MI);
     } else {
       assert(isa<MemSetInst>(MI));
       Value *Ops[] = {
         EltPtr, MI->getOperand(2),  // Dest, Value,
-        ConstantInt::get(MI->getOperand(3)->getType(), EltSize), // Size
+        Context->getConstantInt(MI->getOperand(3)->getType(), EltSize), // Size
         Zero  // Align
       };
       CallInst::Create(TheFn, Ops, Ops + 4, "", MI);
@@ -907,7 +909,8 @@ void SROA::RewriteStoreUserOfWholeAlloca(StoreInst *SI,
     return;
   // Handle tail padding by extending the operand
   if (TD->getTypeSizeInBits(SrcVal->getType()) != AllocaSizeBits)
-    SrcVal = new ZExtInst(SrcVal, IntegerType::get(AllocaSizeBits), "", SI);
+    SrcVal = new ZExtInst(SrcVal,
+                          Context->getIntegerType(AllocaSizeBits), "", SI);
 
   DOUT << "PROMOTING STORE TO WHOLE ALLOCA: " << *AI << *SI;
 
@@ -926,7 +929,7 @@ void SROA::RewriteStoreUserOfWholeAlloca(StoreInst *SI,
       
       Value *EltVal = SrcVal;
       if (Shift) {
-        Value *ShiftVal = ConstantInt::get(EltVal->getType(), Shift);
+        Value *ShiftVal = Context->getConstantInt(EltVal->getType(), Shift);
         EltVal = BinaryOperator::CreateLShr(EltVal, ShiftVal,
                                             "sroa.store.elt", SI);
       }
@@ -938,7 +941,8 @@ void SROA::RewriteStoreUserOfWholeAlloca(StoreInst *SI,
       if (FieldSizeBits == 0) continue;
       
       if (FieldSizeBits != AllocaSizeBits)
-        EltVal = new TruncInst(EltVal, IntegerType::get(FieldSizeBits), "", SI);
+        EltVal = new TruncInst(EltVal,
+                               Context->getIntegerType(FieldSizeBits), "", SI);
       Value *DestField = NewElts[i];
       if (EltVal->getType() == FieldTy) {
         // Storing to an integer field of this size, just do it.
@@ -948,7 +952,7 @@ void SROA::RewriteStoreUserOfWholeAlloca(StoreInst *SI,
       } else {
         // Otherwise, bitcast the dest pointer (for aggregates).
         DestField = new BitCastInst(DestField,
-                                    PointerType::getUnqual(EltVal->getType()),
+                              Context->getPointerTypeUnqual(EltVal->getType()),
                                     "", SI);
       }
       new StoreInst(EltVal, DestField, SI);
@@ -973,14 +977,15 @@ void SROA::RewriteStoreUserOfWholeAlloca(StoreInst *SI,
       
       Value *EltVal = SrcVal;
       if (Shift) {
-        Value *ShiftVal = ConstantInt::get(EltVal->getType(), Shift);
+        Value *ShiftVal = Context->getConstantInt(EltVal->getType(), Shift);
         EltVal = BinaryOperator::CreateLShr(EltVal, ShiftVal,
                                             "sroa.store.elt", SI);
       }
       
       // Truncate down to an integer of the right size.
       if (ElementSizeBits != AllocaSizeBits)
-        EltVal = new TruncInst(EltVal, IntegerType::get(ElementSizeBits),"",SI);
+        EltVal = new TruncInst(EltVal, 
+                               Context->getIntegerType(ElementSizeBits),"",SI);
       Value *DestField = NewElts[i];
       if (EltVal->getType() == ArrayEltTy) {
         // Storing to an integer field of this size, just do it.
@@ -990,7 +995,7 @@ void SROA::RewriteStoreUserOfWholeAlloca(StoreInst *SI,
       } else {
         // Otherwise, bitcast the dest pointer (for aggregates).
         DestField = new BitCastInst(DestField,
-                                    PointerType::getUnqual(EltVal->getType()),
+                              Context->getPointerTypeUnqual(EltVal->getType()),
                                     "", SI);
       }
       new StoreInst(EltVal, DestField, SI);
@@ -1034,7 +1039,8 @@ void SROA::RewriteLoadUserOfWholeAlloca(LoadInst *LI, AllocationInst *AI,
     ArrayEltBitOffset = TD->getTypeAllocSizeInBits(ArrayEltTy);
   }    
     
-  Value *ResultVal = Constant::getNullValue(IntegerType::get(AllocaSizeBits));
+  Value *ResultVal =
+                 Context->getNullValue(Context->getIntegerType(AllocaSizeBits));
   
   for (unsigned i = 0, e = NewElts.size(); i != e; ++i) {
     // Load the value from the alloca.  If the NewElt is an aggregate, cast
@@ -1047,10 +1053,11 @@ void SROA::RewriteLoadUserOfWholeAlloca(LoadInst *LI, AllocationInst *AI,
     // Ignore zero sized fields like {}, they obviously contain no data.
     if (FieldSizeBits == 0) continue;
     
-    const IntegerType *FieldIntTy = IntegerType::get(FieldSizeBits);
+    const IntegerType *FieldIntTy = Context->getIntegerType(FieldSizeBits);
     if (!isa<IntegerType>(FieldTy) && !FieldTy->isFloatingPoint() &&
         !isa<VectorType>(FieldTy))
-      SrcField = new BitCastInst(SrcField, PointerType::getUnqual(FieldIntTy),
+      SrcField = new BitCastInst(SrcField,
+                                 Context->getPointerTypeUnqual(FieldIntTy),
                                  "", LI);
     SrcField = new LoadInst(SrcField, "sroa.load.elt", LI);
 
@@ -1075,7 +1082,7 @@ void SROA::RewriteLoadUserOfWholeAlloca(LoadInst *LI, AllocationInst *AI,
       Shift = AllocaSizeBits-Shift-FieldIntTy->getBitWidth();
     
     if (Shift) {
-      Value *ShiftVal = ConstantInt::get(SrcField->getType(), Shift);
+      Value *ShiftVal = Context->getConstantInt(SrcField->getType(), Shift);
       SrcField = BinaryOperator::CreateShl(SrcField, ShiftVal, "", LI);
     }
 
@@ -1179,7 +1186,7 @@ void SROA::CleanupGEP(GetElementPtrInst *GEPI) {
     return;
 
   if (NumElements == 1) {
-    GEPI->setOperand(2, Constant::getNullValue(Type::Int32Ty));
+    GEPI->setOperand(2, Context->getNullValue(Type::Int32Ty));
     return;
   } 
     
@@ -1187,16 +1194,16 @@ void SROA::CleanupGEP(GetElementPtrInst *GEPI) {
   // All users of the GEP must be loads.  At each use of the GEP, insert
   // two loads of the appropriate indexed GEP and select between them.
   Value *IsOne = new ICmpInst(ICmpInst::ICMP_NE, I.getOperand(), 
-                              Constant::getNullValue(I.getOperand()->getType()),
+                              Context->getNullValue(I.getOperand()->getType()),
                               "isone", GEPI);
   // Insert the new GEP instructions, which are properly indexed.
   SmallVector<Value*, 8> Indices(GEPI->op_begin()+1, GEPI->op_end());
-  Indices[1] = Constant::getNullValue(Type::Int32Ty);
+  Indices[1] = Context->getNullValue(Type::Int32Ty);
   Value *ZeroIdx = GetElementPtrInst::Create(GEPI->getOperand(0),
                                              Indices.begin(),
                                              Indices.end(),
                                              GEPI->getName()+".0", GEPI);
-  Indices[1] = ConstantInt::get(Type::Int32Ty, 1);
+  Indices[1] = Context->getConstantInt(Type::Int32Ty, 1);
   Value *OneIdx = GetElementPtrInst::Create(GEPI->getOperand(0),
                                             Indices.begin(),
                                             Indices.end(),
@@ -1253,7 +1260,8 @@ void SROA::CleanupAllocaUsers(AllocationInst *AI) {
 ///      large) integer type with extract and insert operations where the loads
 ///      and stores would mutate the memory.
 static void MergeInType(const Type *In, uint64_t Offset, const Type *&VecTy,
-                        unsigned AllocaSize, const TargetData &TD) {
+                        unsigned AllocaSize, const TargetData &TD,
+                        LLVMContext* Context) {
   // If this could be contributing to a vector, analyze it.
   if (VecTy != Type::VoidTy) { // either null or a vector type.
 
@@ -1281,7 +1289,7 @@ static void MergeInType(const Type *In, uint64_t Offset, const Type *&VecTy,
            cast<VectorType>(VecTy)->getElementType()
                  ->getPrimitiveSizeInBits()/8 == EltSize)) {
         if (VecTy == 0)
-          VecTy = VectorType::get(In, AllocaSize/EltSize);
+          VecTy = Context->getVectorType(In, AllocaSize/EltSize);
         return;
       }
     }
@@ -1312,7 +1320,7 @@ bool SROA::CanConvertToScalar(Value *V, bool &IsNotTrivial, const Type *&VecTy,
       // Don't break volatile loads.
       if (LI->isVolatile())
         return false;
-      MergeInType(LI->getType(), Offset, VecTy, AllocaSize, *TD);
+      MergeInType(LI->getType(), Offset, VecTy, AllocaSize, *TD, Context);
       SawVec |= isa<VectorType>(LI->getType());
       continue;
     }
@@ -1320,7 +1328,8 @@ bool SROA::CanConvertToScalar(Value *V, bool &IsNotTrivial, const Type *&VecTy,
     if (StoreInst *SI = dyn_cast<StoreInst>(User)) {
       // Storing the pointer, not into the value?
       if (SI->getOperand(0) == V || SI->isVolatile()) return 0;
-      MergeInType(SI->getOperand(0)->getType(), Offset, VecTy, AllocaSize, *TD);
+      MergeInType(SI->getOperand(0)->getType(), Offset,
+                  VecTy, AllocaSize, *TD, Context);
       SawVec |= isa<VectorType>(SI->getOperand(0)->getType());
       continue;
     }
@@ -1449,8 +1458,8 @@ void SROA::ConvertUsesToScalar(Value *Ptr, AllocaInst *NewAI, uint64_t Offset) {
             APVal |= APVal << 8;
         
         Value *Old = Builder.CreateLoad(NewAI, (NewAI->getName()+".in").c_str());
-        Value *New = ConvertScalar_InsertValue(ConstantInt::get(APVal), Old,
-                                               Offset, Builder);
+        Value *New = ConvertScalar_InsertValue(Context->getConstantInt(APVal),
+                                               Old, Offset, Builder);
         Builder.CreateStore(New, NewAI);
       }
       MSI->eraseFromParent();
@@ -1537,7 +1546,7 @@ Value *SROA::ConvertScalar_ExtractValue(Value *FromVal, const Type *ToType,
     }
     // Return the element extracted out of it.
     Value *V = Builder.CreateExtractElement(FromVal,
-                                            ConstantInt::get(Type::Int32Ty,Elt),
+                                    Context->getConstantInt(Type::Int32Ty,Elt),
                                             "tmp");
     if (V->getType() != ToType)
       V = Builder.CreateBitCast(V, ToType, "tmp");
@@ -1548,7 +1557,7 @@ Value *SROA::ConvertScalar_ExtractValue(Value *FromVal, const Type *ToType,
   // use insertvalue's to form the FCA.
   if (const StructType *ST = dyn_cast<StructType>(ToType)) {
     const StructLayout &Layout = *TD->getStructLayout(ST);
-    Value *Res = UndefValue::get(ST);
+    Value *Res = Context->getUndef(ST);
     for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i) {
       Value *Elt = ConvertScalar_ExtractValue(FromVal, ST->getElementType(i),
                                         Offset+Layout.getElementOffsetInBits(i),
@@ -1560,7 +1569,7 @@ Value *SROA::ConvertScalar_ExtractValue(Value *FromVal, const Type *ToType,
   
   if (const ArrayType *AT = dyn_cast<ArrayType>(ToType)) {
     uint64_t EltSize = TD->getTypeAllocSizeInBits(AT->getElementType());
-    Value *Res = UndefValue::get(AT);
+    Value *Res = Context->getUndef(AT);
     for (unsigned i = 0, e = AT->getNumElements(); i != e; ++i) {
       Value *Elt = ConvertScalar_ExtractValue(FromVal, AT->getElementType(),
                                               Offset+i*EltSize, Builder);
@@ -1589,18 +1598,22 @@ Value *SROA::ConvertScalar_ExtractValue(Value *FromVal, const Type *ToType,
   // We do this to support (f.e.) loads off the end of a structure where
   // only some bits are used.
   if (ShAmt > 0 && (unsigned)ShAmt < NTy->getBitWidth())
-    FromVal = Builder.CreateLShr(FromVal, ConstantInt::get(FromVal->getType(),
+    FromVal = Builder.CreateLShr(FromVal,
+                                 Context->getConstantInt(FromVal->getType(),
                                                            ShAmt), "tmp");
   else if (ShAmt < 0 && (unsigned)-ShAmt < NTy->getBitWidth())
-    FromVal = Builder.CreateShl(FromVal, ConstantInt::get(FromVal->getType(),
+    FromVal = Builder.CreateShl(FromVal, 
+                                Context->getConstantInt(FromVal->getType(),
                                                           -ShAmt), "tmp");
 
   // Finally, unconditionally truncate the integer to the right width.
   unsigned LIBitWidth = TD->getTypeSizeInBits(ToType);
   if (LIBitWidth < NTy->getBitWidth())
-    FromVal = Builder.CreateTrunc(FromVal, IntegerType::get(LIBitWidth), "tmp");
+    FromVal =
+      Builder.CreateTrunc(FromVal, Context->getIntegerType(LIBitWidth), "tmp");
   else if (LIBitWidth > NTy->getBitWidth())
-    FromVal = Builder.CreateZExt(FromVal, IntegerType::get(LIBitWidth), "tmp");
+    FromVal =
+       Builder.CreateZExt(FromVal, Context->getIntegerType(LIBitWidth), "tmp");
 
   // If the result is an integer, this is a trunc or bitcast.
   if (isa<IntegerType>(ToType)) {
@@ -1651,7 +1664,7 @@ Value *SROA::ConvertScalar_InsertValue(Value *SV, Value *Old,
       SV = Builder.CreateBitCast(SV, VTy->getElementType(), "tmp");
     
     SV = Builder.CreateInsertElement(Old, SV, 
-                                     ConstantInt::get(Type::Int32Ty, Elt),
+                                   Context->getConstantInt(Type::Int32Ty, Elt),
                                      "tmp");
     return SV;
   }
@@ -1684,7 +1697,7 @@ Value *SROA::ConvertScalar_InsertValue(Value *SV, Value *Old,
   unsigned SrcStoreWidth = TD->getTypeStoreSizeInBits(SV->getType());
   unsigned DestStoreWidth = TD->getTypeStoreSizeInBits(AllocaType);
   if (SV->getType()->isFloatingPoint() || isa<VectorType>(SV->getType()))
-    SV = Builder.CreateBitCast(SV, IntegerType::get(SrcWidth), "tmp");
+    SV = Builder.CreateBitCast(SV, Context->getIntegerType(SrcWidth), "tmp");
   else if (isa<PointerType>(SV->getType()))
     SV = Builder.CreatePtrToInt(SV, TD->getIntPtrType(), "tmp");
 
@@ -1719,10 +1732,12 @@ Value *SROA::ConvertScalar_InsertValue(Value *SV, Value *Old,
   // only some bits in the structure are set.
   APInt Mask(APInt::getLowBitsSet(DestWidth, SrcWidth));
   if (ShAmt > 0 && (unsigned)ShAmt < DestWidth) {
-    SV = Builder.CreateShl(SV, ConstantInt::get(SV->getType(), ShAmt), "tmp");
+    SV = Builder.CreateShl(SV, Context->getConstantInt(SV->getType(),
+                           ShAmt), "tmp");
     Mask <<= ShAmt;
   } else if (ShAmt < 0 && (unsigned)-ShAmt < DestWidth) {
-    SV = Builder.CreateLShr(SV, ConstantInt::get(SV->getType(), -ShAmt), "tmp");
+    SV = Builder.CreateLShr(SV, Context->getConstantInt(SV->getType(),
+                            -ShAmt), "tmp");
     Mask = Mask.lshr(-ShAmt);
   }
 
@@ -1730,7 +1745,7 @@ Value *SROA::ConvertScalar_InsertValue(Value *SV, Value *Old,
   // in the new bits.
   if (SrcWidth != DestWidth) {
     assert(DestWidth > SrcWidth);
-    Old = Builder.CreateAnd(Old, ConstantInt::get(~Mask), "mask");
+    Old = Builder.CreateAnd(Old, Context->getConstantInt(~Mask), "mask");
     SV = Builder.CreateOr(Old, SV, "ins");
   }
   return SV;
diff --git a/lib/Transforms/Scalar/SimplifyCFGPass.cpp b/lib/Transforms/Scalar/SimplifyCFGPass.cpp
index 5a85a04..b8bce80 100644
--- a/lib/Transforms/Scalar/SimplifyCFGPass.cpp
+++ b/lib/Transforms/Scalar/SimplifyCFGPass.cpp
@@ -26,6 +26,7 @@
 #include "llvm/Transforms/Utils/Local.h"
 #include "llvm/Constants.h"
 #include "llvm/Instructions.h"
+#include "llvm/LLVMContext.h"
 #include "llvm/Module.h"
 #include "llvm/Attributes.h"
 #include "llvm/Support/CFG.h"
@@ -57,7 +58,7 @@ FunctionPass *llvm::createCFGSimplificationPass() {
 
 /// ChangeToUnreachable - Insert an unreachable instruction before the specified
 /// instruction, making it and the rest of the code in the block dead.
-static void ChangeToUnreachable(Instruction *I) {
+static void ChangeToUnreachable(Instruction *I, LLVMContext* Context) {
   BasicBlock *BB = I->getParent();
   // Loop over all of the successors, removing BB's entry from any PHI
   // nodes.
@@ -70,7 +71,7 @@ static void ChangeToUnreachable(Instruction *I) {
   BasicBlock::iterator BBI = I, BBE = BB->end();
   while (BBI != BBE) {
     if (!BBI->use_empty())
-      BBI->replaceAllUsesWith(UndefValue::get(BBI->getType()));
+      BBI->replaceAllUsesWith(Context->getUndef(BBI->getType()));
     BB->getInstList().erase(BBI++);
   }
 }
@@ -95,7 +96,8 @@ static void ChangeToCall(InvokeInst *II) {
 }
 
 static bool MarkAliveBlocks(BasicBlock *BB,
-                            SmallPtrSet<BasicBlock*, 128> &Reachable) {
+                            SmallPtrSet<BasicBlock*, 128> &Reachable,
+                            LLVMContext* Context) {
   
   SmallVector<BasicBlock*, 128> Worklist;
   Worklist.push_back(BB);
@@ -118,7 +120,7 @@ static bool MarkAliveBlocks(BasicBlock *BB,
           // though.
           ++BBI;
           if (!isa<UnreachableInst>(BBI)) {
-            ChangeToUnreachable(BBI);
+            ChangeToUnreachable(BBI, Context);
             Changed = true;
           }
           break;
@@ -131,7 +133,7 @@ static bool MarkAliveBlocks(BasicBlock *BB,
         if (isa<UndefValue>(Ptr) ||
             (isa<ConstantPointerNull>(Ptr) &&
              cast<PointerType>(Ptr->getType())->getAddressSpace() == 0)) {
-          ChangeToUnreachable(SI);
+          ChangeToUnreachable(SI, Context);
           Changed = true;
           break;
         }
@@ -157,7 +159,7 @@ static bool MarkAliveBlocks(BasicBlock *BB,
 /// otherwise.
 static bool RemoveUnreachableBlocksFromFn(Function &F) {
   SmallPtrSet<BasicBlock*, 128> Reachable;
-  bool Changed = MarkAliveBlocks(F.begin(), Reachable);
+  bool Changed = MarkAliveBlocks(F.begin(), Reachable, F.getContext());
   
   // If there are unreachable blocks in the CFG...
   if (Reachable.size() == F.size())
diff --git a/lib/Transforms/Scalar/SimplifyLibCalls.cpp b/lib/Transforms/Scalar/SimplifyLibCalls.cpp
index bbcb792..ec48469 100644
--- a/lib/Transforms/Scalar/SimplifyLibCalls.cpp
+++ b/lib/Transforms/Scalar/SimplifyLibCalls.cpp
@@ -20,6 +20,7 @@
 #define DEBUG_TYPE "simplify-libcalls"
 #include "llvm/Transforms/Scalar.h"
 #include "llvm/Intrinsics.h"
+#include "llvm/LLVMContext.h"
 #include "llvm/Module.h"
 #include "llvm/Pass.h"
 #include "llvm/Support/IRBuilder.h"
@@ -47,6 +48,7 @@ class VISIBILITY_HIDDEN LibCallOptimization {
 protected:
   Function *Caller;
   const TargetData *TD;
+  LLVMContext* Context;
 public:
   LibCallOptimization() { }
   virtual ~LibCallOptimization() {}
@@ -62,6 +64,8 @@ public:
   Value *OptimizeCall(CallInst *CI, const TargetData &TD, IRBuilder<> &B) {
     Caller = CI->getParent()->getParent();
     this->TD = &TD;
+    if (CI->getCalledFunction())
+      Context = CI->getCalledFunction()->getContext();
     return CallOptimizer(CI->getCalledFunction(), CI, B);
   }
 
@@ -119,7 +123,8 @@ public:
 
 /// CastToCStr - Return V if it is an i8*, otherwise cast it to i8*.
 Value *LibCallOptimization::CastToCStr(Value *V, IRBuilder<> &B) {
-  return B.CreateBitCast(V, PointerType::getUnqual(Type::Int8Ty), "cstr");
+  return
+        B.CreateBitCast(V, Context->getPointerTypeUnqual(Type::Int8Ty), "cstr");
 }
 
 /// EmitStrLen - Emit a call to the strlen function to the builder, for the
@@ -133,7 +138,7 @@ Value *LibCallOptimization::EmitStrLen(Value *Ptr, IRBuilder<> &B) {
 
   Constant *StrLen =M->getOrInsertFunction("strlen", AttrListPtr::get(AWI, 2),
                                            TD->getIntPtrType(),
-                                           PointerType::getUnqual(Type::Int8Ty),
+                                    Context->getPointerTypeUnqual(Type::Int8Ty),
                                            NULL);
   CallInst *CI = B.CreateCall(StrLen, CastToCStr(Ptr, B), "strlen");
   if (const Function *F = dyn_cast<Function>(StrLen->stripPointerCasts()))
@@ -152,7 +157,7 @@ Value *LibCallOptimization::EmitMemCpy(Value *Dst, Value *Src, Value *Len,
   Tys[0] = Len->getType();
   Value *MemCpy = Intrinsic::getDeclaration(M, IID, Tys, 1);
   return B.CreateCall4(MemCpy, CastToCStr(Dst, B), CastToCStr(Src, B), Len,
-                       ConstantInt::get(Type::Int32Ty, Align));
+                       Context->getConstantInt(Type::Int32Ty, Align));
 }
 
 /// EmitMemChr - Emit a call to the memchr function.  This assumes that Ptr is
@@ -164,8 +169,8 @@ Value *LibCallOptimization::EmitMemChr(Value *Ptr, Value *Val,
   AWI = AttributeWithIndex::get(~0u, Attribute::ReadOnly | Attribute::NoUnwind);
 
   Value *MemChr = M->getOrInsertFunction("memchr", AttrListPtr::get(&AWI, 1),
-                                         PointerType::getUnqual(Type::Int8Ty),
-                                         PointerType::getUnqual(Type::Int8Ty),
+                                    Context->getPointerTypeUnqual(Type::Int8Ty),
+                                    Context->getPointerTypeUnqual(Type::Int8Ty),
                                          Type::Int32Ty, TD->getIntPtrType(),
                                          NULL);
   CallInst *CI = B.CreateCall3(MemChr, CastToCStr(Ptr, B), Val, Len, "memchr");
@@ -188,8 +193,8 @@ Value *LibCallOptimization::EmitMemCmp(Value *Ptr1, Value *Ptr2,
 
   Value *MemCmp = M->getOrInsertFunction("memcmp", AttrListPtr::get(AWI, 3),
                                          Type::Int32Ty,
-                                         PointerType::getUnqual(Type::Int8Ty),
-                                         PointerType::getUnqual(Type::Int8Ty),
+                                    Context->getPointerTypeUnqual(Type::Int8Ty),
+                                    Context->getPointerTypeUnqual(Type::Int8Ty),
                                          TD->getIntPtrType(), NULL);
   CallInst *CI = B.CreateCall3(MemCmp, CastToCStr(Ptr1, B), CastToCStr(Ptr2, B),
                                Len, "memcmp");
@@ -208,7 +213,7 @@ Value *LibCallOptimization::EmitMemSet(Value *Dst, Value *Val,
  const Type *Tys[1];
  Tys[0] = Len->getType();
  Value *MemSet = Intrinsic::getDeclaration(M, IID, Tys, 1);
- Value *Align = ConstantInt::get(Type::Int32Ty, 1);
+ Value *Align = Context->getConstantInt(Type::Int32Ty, 1);
  return B.CreateCall4(MemSet, CastToCStr(Dst, B), Val, Len, Align);
 }
 
@@ -267,7 +272,7 @@ void LibCallOptimization::EmitPutS(Value *Str, IRBuilder<> &B) {
 
   Value *PutS = M->getOrInsertFunction("puts", AttrListPtr::get(AWI, 2),
                                        Type::Int32Ty,
-                                       PointerType::getUnqual(Type::Int8Ty),
+                                    Context->getPointerTypeUnqual(Type::Int8Ty),
                                        NULL);
   CallInst *CI = B.CreateCall(PutS, CastToCStr(Str, B), "puts");
   if (const Function *F = dyn_cast<Function>(PutS->stripPointerCasts()))
@@ -307,11 +312,11 @@ void LibCallOptimization::EmitFPutS(Value *Str, Value *File, IRBuilder<> &B) {
   Constant *F;
   if (isa<PointerType>(File->getType()))
     F = M->getOrInsertFunction("fputs", AttrListPtr::get(AWI, 3), Type::Int32Ty,
-                               PointerType::getUnqual(Type::Int8Ty),
+                               Context->getPointerTypeUnqual(Type::Int8Ty),
                                File->getType(), NULL);
   else
     F = M->getOrInsertFunction("fputs", Type::Int32Ty,
-                               PointerType::getUnqual(Type::Int8Ty),
+                               Context->getPointerTypeUnqual(Type::Int8Ty),
                                File->getType(), NULL);
   CallInst *CI = B.CreateCall2(F, CastToCStr(Str, B), File, "fputs");
 
@@ -332,16 +337,16 @@ void LibCallOptimization::EmitFWrite(Value *Ptr, Value *Size, Value *File,
   if (isa<PointerType>(File->getType()))
     F = M->getOrInsertFunction("fwrite", AttrListPtr::get(AWI, 3),
                                TD->getIntPtrType(),
-                               PointerType::getUnqual(Type::Int8Ty),
+                               Context->getPointerTypeUnqual(Type::Int8Ty),
                                TD->getIntPtrType(), TD->getIntPtrType(),
                                File->getType(), NULL);
   else
     F = M->getOrInsertFunction("fwrite", TD->getIntPtrType(),
-                               PointerType::getUnqual(Type::Int8Ty),
+                               Context->getPointerTypeUnqual(Type::Int8Ty),
                                TD->getIntPtrType(), TD->getIntPtrType(),
                                File->getType(), NULL);
   CallInst *CI = B.CreateCall4(F, CastToCStr(Ptr, B), Size,
-                               ConstantInt::get(TD->getIntPtrType(), 1), File);
+                        Context->getConstantInt(TD->getIntPtrType(), 1), File);
 
   if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts()))
     CI->setCallingConv(Fn->getCallingConv());
@@ -540,7 +545,7 @@ struct VISIBILITY_HIDDEN StrCatOpt : public LibCallOptimization {
     // Verify the "strcat" function prototype.
     const FunctionType *FT = Callee->getFunctionType();
     if (FT->getNumParams() != 2 ||
-        FT->getReturnType() != PointerType::getUnqual(Type::Int8Ty) ||
+        FT->getReturnType() != Context->getPointerTypeUnqual(Type::Int8Ty) ||
         FT->getParamType(0) != FT->getReturnType() ||
         FT->getParamType(1) != FT->getReturnType())
       return 0;
@@ -574,7 +579,8 @@ struct VISIBILITY_HIDDEN StrCatOpt : public LibCallOptimization {
     
     // We have enough information to now generate the memcpy call to do the
     // concatenation for us.  Make a memcpy to copy the nul byte with align = 1.
-    EmitMemCpy(CpyDst, Src, ConstantInt::get(TD->getIntPtrType(), Len+1), 1, B);
+    EmitMemCpy(CpyDst, Src,
+               Context->getConstantInt(TD->getIntPtrType(), Len+1), 1, B);
   }
 };
 
@@ -586,7 +592,7 @@ struct VISIBILITY_HIDDEN StrNCatOpt : public StrCatOpt {
     // Verify the "strncat" function prototype.
     const FunctionType *FT = Callee->getFunctionType();
     if (FT->getNumParams() != 3 ||
-        FT->getReturnType() != PointerType::getUnqual(Type::Int8Ty) ||
+        FT->getReturnType() != Context->getPointerTypeUnqual(Type::Int8Ty) ||
         FT->getParamType(0) != FT->getReturnType() ||
         FT->getParamType(1) != FT->getReturnType() ||
         !isa<IntegerType>(FT->getParamType(2)))
@@ -631,7 +637,7 @@ struct VISIBILITY_HIDDEN StrChrOpt : public LibCallOptimization {
     // Verify the "strchr" function prototype.
     const FunctionType *FT = Callee->getFunctionType();
     if (FT->getNumParams() != 2 ||
-        FT->getReturnType() != PointerType::getUnqual(Type::Int8Ty) ||
+        FT->getReturnType() != Context->getPointerTypeUnqual(Type::Int8Ty) ||
         FT->getParamType(0) != FT->getReturnType())
       return 0;
     
@@ -646,7 +652,7 @@ struct VISIBILITY_HIDDEN StrChrOpt : public LibCallOptimization {
         return 0;
       
       return EmitMemChr(SrcStr, CI->getOperand(2), // include nul.
-                        ConstantInt::get(TD->getIntPtrType(), Len), B);
+                        Context->getConstantInt(TD->getIntPtrType(), Len), B);
     }
 
     // Otherwise, the character is a constant, see if the first argument is
@@ -663,7 +669,7 @@ struct VISIBILITY_HIDDEN StrChrOpt : public LibCallOptimization {
     uint64_t i = 0;
     while (1) {
       if (i == Str.size())    // Didn't find the char.  strchr returns null.
-        return Constant::getNullValue(CI->getType());
+        return Context->getNullValue(CI->getType());
       // Did we find our match?
       if (Str[i] == CharValue)
         break;
@@ -671,7 +677,7 @@ struct VISIBILITY_HIDDEN StrChrOpt : public LibCallOptimization {
     }
     
     // strchr(s+n,c)  -> gep(s+n+i,c)
-    Value *Idx = ConstantInt::get(Type::Int64Ty, i);
+    Value *Idx = Context->getConstantInt(Type::Int64Ty, i);
     return B.CreateGEP(SrcStr, Idx, "strchr");
   }
 };
@@ -685,12 +691,12 @@ struct VISIBILITY_HIDDEN StrCmpOpt : public LibCallOptimization {
     const FunctionType *FT = Callee->getFunctionType();
     if (FT->getNumParams() != 2 || FT->getReturnType() != Type::Int32Ty ||
         FT->getParamType(0) != FT->getParamType(1) ||
-        FT->getParamType(0) != PointerType::getUnqual(Type::Int8Ty))
+        FT->getParamType(0) != Context->getPointerTypeUnqual(Type::Int8Ty))
       return 0;
     
     Value *Str1P = CI->getOperand(1), *Str2P = CI->getOperand(2);
     if (Str1P == Str2P)      // strcmp(x,x)  -> 0
-      return ConstantInt::get(CI->getType(), 0);
+      return Context->getConstantInt(CI->getType(), 0);
     
     std::string Str1, Str2;
     bool HasStr1 = GetConstantStringInfo(Str1P, Str1);
@@ -704,14 +710,15 @@ struct VISIBILITY_HIDDEN StrCmpOpt : public LibCallOptimization {
     
     // strcmp(x, y)  -> cnst  (if both x and y are constant strings)
     if (HasStr1 && HasStr2)
-      return ConstantInt::get(CI->getType(), strcmp(Str1.c_str(),Str2.c_str()));
+      return Context->getConstantInt(CI->getType(), 
+                                     strcmp(Str1.c_str(),Str2.c_str()));
 
     // strcmp(P, "x") -> memcmp(P, "x", 2)
     uint64_t Len1 = GetStringLength(Str1P);
     uint64_t Len2 = GetStringLength(Str2P);
     if (Len1 && Len2) {
       return EmitMemCmp(Str1P, Str2P,
-                        ConstantInt::get(TD->getIntPtrType(),
+                        Context->getConstantInt(TD->getIntPtrType(),
                         std::min(Len1, Len2)), B);
     }
 
@@ -728,13 +735,13 @@ struct VISIBILITY_HIDDEN StrNCmpOpt : public LibCallOptimization {
     const FunctionType *FT = Callee->getFunctionType();
     if (FT->getNumParams() != 3 || FT->getReturnType() != Type::Int32Ty ||
         FT->getParamType(0) != FT->getParamType(1) ||
-        FT->getParamType(0) != PointerType::getUnqual(Type::Int8Ty) ||
+        FT->getParamType(0) != Context->getPointerTypeUnqual(Type::Int8Ty) ||
         !isa<IntegerType>(FT->getParamType(2)))
       return 0;
     
     Value *Str1P = CI->getOperand(1), *Str2P = CI->getOperand(2);
     if (Str1P == Str2P)      // strncmp(x,x,n)  -> 0
-      return ConstantInt::get(CI->getType(), 0);
+      return Context->getConstantInt(CI->getType(), 0);
     
     // Get the length argument if it is constant.
     uint64_t Length;
@@ -744,7 +751,7 @@ struct VISIBILITY_HIDDEN StrNCmpOpt : public LibCallOptimization {
       return 0;
     
     if (Length == 0) // strncmp(x,y,0)   -> 0
-      return ConstantInt::get(CI->getType(), 0);
+      return Context->getConstantInt(CI->getType(), 0);
     
     std::string Str1, Str2;
     bool HasStr1 = GetConstantStringInfo(Str1P, Str1);
@@ -758,7 +765,7 @@ struct VISIBILITY_HIDDEN StrNCmpOpt : public LibCallOptimization {
     
     // strncmp(x, y)  -> cnst  (if both x and y are constant strings)
     if (HasStr1 && HasStr2)
-      return ConstantInt::get(CI->getType(),
+      return Context->getConstantInt(CI->getType(),
                               strncmp(Str1.c_str(), Str2.c_str(), Length));
     return 0;
   }
@@ -774,7 +781,7 @@ struct VISIBILITY_HIDDEN StrCpyOpt : public LibCallOptimization {
     const FunctionType *FT = Callee->getFunctionType();
     if (FT->getNumParams() != 2 || FT->getReturnType() != FT->getParamType(0) ||
         FT->getParamType(0) != FT->getParamType(1) ||
-        FT->getParamType(0) != PointerType::getUnqual(Type::Int8Ty))
+        FT->getParamType(0) != Context->getPointerTypeUnqual(Type::Int8Ty))
       return 0;
     
     Value *Dst = CI->getOperand(1), *Src = CI->getOperand(2);
@@ -787,7 +794,8 @@ struct VISIBILITY_HIDDEN StrCpyOpt : public LibCallOptimization {
     
     // We have enough information to now generate the memcpy call to do the
     // concatenation for us.  Make a memcpy to copy the nul byte with align = 1.
-    EmitMemCpy(Dst, Src, ConstantInt::get(TD->getIntPtrType(), Len), 1, B);
+    EmitMemCpy(Dst, Src,
+               Context->getConstantInt(TD->getIntPtrType(), Len), 1, B);
     return Dst;
   }
 };
@@ -800,7 +808,7 @@ struct VISIBILITY_HIDDEN StrNCpyOpt : public LibCallOptimization {
     const FunctionType *FT = Callee->getFunctionType();
     if (FT->getNumParams() != 3 || FT->getReturnType() != FT->getParamType(0) ||
         FT->getParamType(0) != FT->getParamType(1) ||
-        FT->getParamType(0) != PointerType::getUnqual(Type::Int8Ty) ||
+        FT->getParamType(0) != Context->getPointerTypeUnqual(Type::Int8Ty) ||
         !isa<IntegerType>(FT->getParamType(2)))
       return 0;
 
@@ -815,7 +823,7 @@ struct VISIBILITY_HIDDEN StrNCpyOpt : public LibCallOptimization {
 
     if (SrcLen == 0) {
       // strncpy(x, "", y) -> memset(x, '\0', y, 1)
-      EmitMemSet(Dst, ConstantInt::get(Type::Int8Ty, '\0'), LenOp, B);
+      EmitMemSet(Dst, Context->getConstantInt(Type::Int8Ty, '\0'), LenOp, B);
       return Dst;
     }
 
@@ -831,7 +839,8 @@ struct VISIBILITY_HIDDEN StrNCpyOpt : public LibCallOptimization {
     if (Len > SrcLen+1) return 0;
 
     // strncpy(x, s, c) -> memcpy(x, s, c, 1) [s and c are constant]
-    EmitMemCpy(Dst, Src, ConstantInt::get(TD->getIntPtrType(), Len), 1, B);
+    EmitMemCpy(Dst, Src,
+               Context->getConstantInt(TD->getIntPtrType(), Len), 1, B);
 
     return Dst;
   }
@@ -844,7 +853,7 @@ struct VISIBILITY_HIDDEN StrLenOpt : public LibCallOptimization {
   virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
     const FunctionType *FT = Callee->getFunctionType();
     if (FT->getNumParams() != 1 ||
-        FT->getParamType(0) != PointerType::getUnqual(Type::Int8Ty) ||
+        FT->getParamType(0) != Context->getPointerTypeUnqual(Type::Int8Ty) ||
         !isa<IntegerType>(FT->getReturnType()))
       return 0;
     
@@ -852,7 +861,7 @@ struct VISIBILITY_HIDDEN StrLenOpt : public LibCallOptimization {
 
     // Constant folding: strlen("xyz") -> 3
     if (uint64_t Len = GetStringLength(Src))
-      return ConstantInt::get(CI->getType(), Len-1);
+      return Context->getConstantInt(CI->getType(), Len-1);
 
     // Handle strlen(p) != 0.
     if (!IsOnlyUsedInZeroEqualityComparison(CI)) return 0;
@@ -899,7 +908,7 @@ struct VISIBILITY_HIDDEN MemCmpOpt : public LibCallOptimization {
     Value *LHS = CI->getOperand(1), *RHS = CI->getOperand(2);
 
     if (LHS == RHS)  // memcmp(s,s,x) -> 0
-      return Constant::getNullValue(CI->getType());
+      return Context->getNullValue(CI->getType());
 
     // Make sure we have a constant length.
     ConstantInt *LenC = dyn_cast<ConstantInt>(CI->getOperand(3));
@@ -907,7 +916,7 @@ struct VISIBILITY_HIDDEN MemCmpOpt : public LibCallOptimization {
     uint64_t Len = LenC->getZExtValue();
 
     if (Len == 0) // memcmp(s1,s2,0) -> 0
-      return Constant::getNullValue(CI->getType());
+      return Context->getNullValue(CI->getType());
 
     if (Len == 1) { // memcmp(S1,S2,1) -> *LHS - *RHS
       Value *LHSV = B.CreateLoad(CastToCStr(LHS, B), "lhsv");
@@ -918,7 +927,7 @@ struct VISIBILITY_HIDDEN MemCmpOpt : public LibCallOptimization {
     // memcmp(S1,S2,2) != 0 -> (*(short*)LHS ^ *(short*)RHS)  != 0
     // memcmp(S1,S2,4) != 0 -> (*(int*)LHS ^ *(int*)RHS)  != 0
     if ((Len == 2 || Len == 4) && IsOnlyUsedInZeroEqualityComparison(CI)) {
-      const Type *PTy = PointerType::getUnqual(Len == 2 ?
+      const Type *PTy = Context->getPointerTypeUnqual(Len == 2 ?
                                                Type::Int16Ty : Type::Int32Ty);
       LHS = B.CreateBitCast(LHS, PTy, "tmp");
       RHS = B.CreateBitCast(RHS, PTy, "tmp");
@@ -971,7 +980,7 @@ struct VISIBILITY_HIDDEN MemMoveOpt : public LibCallOptimization {
     Value *Dst = CastToCStr(CI->getOperand(1), B);
     Value *Src = CastToCStr(CI->getOperand(2), B);
     Value *Size = CI->getOperand(3);
-    Value *Align = ConstantInt::get(Type::Int32Ty, 1);
+    Value *Align = Context->getConstantInt(Type::Int32Ty, 1);
     B.CreateCall4(MemMove, Dst, Src, Size, Align);
     return CI->getOperand(1);
   }
@@ -1025,7 +1034,7 @@ struct VISIBILITY_HIDDEN PowOpt : public LibCallOptimization {
     if (Op2C == 0) return 0;
     
     if (Op2C->getValueAPF().isZero())  // pow(x, 0.0) -> 1.0
-      return ConstantFP::get(CI->getType(), 1.0);
+      return Context->getConstantFP(CI->getType(), 1.0);
     
     if (Op2C->isExactlyValue(0.5)) {
       // FIXME: This is not safe for -0.0 and -inf.  This can only be done when
@@ -1045,7 +1054,8 @@ struct VISIBILITY_HIDDEN PowOpt : public LibCallOptimization {
     if (Op2C->isExactlyValue(2.0))  // pow(x, 2.0) -> x*x
       return B.CreateFMul(Op1, Op1, "pow2");
     if (Op2C->isExactlyValue(-1.0)) // pow(x, -1.0) -> 1.0/x
-      return B.CreateFDiv(ConstantFP::get(CI->getType(), 1.0), Op1, "powrecip");
+      return B.CreateFDiv(Context->getConstantFP(CI->getType(), 1.0),
+                          Op1, "powrecip");
     return 0;
   }
 };
@@ -1083,9 +1093,9 @@ struct VISIBILITY_HIDDEN Exp2Opt : public LibCallOptimization {
       else
         Name = "ldexpl";
 
-      Constant *One = ConstantFP::get(APFloat(1.0f));
+      Constant *One = Context->getConstantFP(APFloat(1.0f));
       if (Op->getType() != Type::FloatTy)
-        One = ConstantExpr::getFPExtend(One, Op->getType());
+        One = Context->getConstantExprFPExtend(One, Op->getType());
 
       Module *M = Caller->getParent();
       Value *Callee = M->getOrInsertFunction(Name, Op->getType(),
@@ -1143,8 +1153,8 @@ struct VISIBILITY_HIDDEN FFSOpt : public LibCallOptimization {
     // Constant fold.
     if (ConstantInt *CI = dyn_cast<ConstantInt>(Op)) {
       if (CI->getValue() == 0)  // ffs(0) -> 0.
-        return Constant::getNullValue(CI->getType());
-      return ConstantInt::get(Type::Int32Ty, // ffs(c) -> cttz(c)+1
+        return Context->getNullValue(CI->getType());
+      return Context->getConstantInt(Type::Int32Ty, // ffs(c) -> cttz(c)+1
                               CI->getValue().countTrailingZeros()+1);
     }
     
@@ -1153,11 +1163,11 @@ struct VISIBILITY_HIDDEN FFSOpt : public LibCallOptimization {
     Value *F = Intrinsic::getDeclaration(Callee->getParent(),
                                          Intrinsic::cttz, &ArgType, 1);
     Value *V = B.CreateCall(F, Op, "cttz");
-    V = B.CreateAdd(V, ConstantInt::get(V->getType(), 1), "tmp");
+    V = B.CreateAdd(V, Context->getConstantInt(V->getType(), 1), "tmp");
     V = B.CreateIntCast(V, Type::Int32Ty, false, "tmp");
     
-    Value *Cond = B.CreateICmpNE(Op, Constant::getNullValue(ArgType), "tmp");
-    return B.CreateSelect(Cond, V, ConstantInt::get(Type::Int32Ty, 0));
+    Value *Cond = B.CreateICmpNE(Op, Context->getNullValue(ArgType), "tmp");
+    return B.CreateSelect(Cond, V, Context->getConstantInt(Type::Int32Ty, 0));
   }
 };
 
@@ -1174,8 +1184,10 @@ struct VISIBILITY_HIDDEN IsDigitOpt : public LibCallOptimization {
     
     // isdigit(c) -> (c-'0') <u 10
     Value *Op = CI->getOperand(1);
-    Op = B.CreateSub(Op, ConstantInt::get(Type::Int32Ty, '0'), "isdigittmp");
-    Op = B.CreateICmpULT(Op, ConstantInt::get(Type::Int32Ty, 10), "isdigit");
+    Op = B.CreateSub(Op, Context->getConstantInt(Type::Int32Ty, '0'), 
+                     "isdigittmp");
+    Op = B.CreateICmpULT(Op, Context->getConstantInt(Type::Int32Ty, 10), 
+                         "isdigit");
     return B.CreateZExt(Op, CI->getType());
   }
 };
@@ -1193,7 +1205,8 @@ struct VISIBILITY_HIDDEN IsAsciiOpt : public LibCallOptimization {
     
     // isascii(c) -> c <u 128
     Value *Op = CI->getOperand(1);
-    Op = B.CreateICmpULT(Op, ConstantInt::get(Type::Int32Ty, 128), "isascii");
+    Op = B.CreateICmpULT(Op, Context->getConstantInt(Type::Int32Ty, 128),
+                         "isascii");
     return B.CreateZExt(Op, CI->getType());
   }
 };
@@ -1211,7 +1224,8 @@ struct VISIBILITY_HIDDEN AbsOpt : public LibCallOptimization {
     
     // abs(x) -> x >s -1 ? x : -x
     Value *Op = CI->getOperand(1);
-    Value *Pos = B.CreateICmpSGT(Op,ConstantInt::getAllOnesValue(Op->getType()),
+    Value *Pos = B.CreateICmpSGT(Op, 
+                             Context->getConstantIntAllOnesValue(Op->getType()),
                                  "ispos");
     Value *Neg = B.CreateNeg(Op, "neg");
     return B.CreateSelect(Pos, Op, Neg);
@@ -1231,7 +1245,8 @@ struct VISIBILITY_HIDDEN ToAsciiOpt : public LibCallOptimization {
       return 0;
     
     // isascii(c) -> c & 0x7f
-    return B.CreateAnd(CI->getOperand(1), ConstantInt::get(CI->getType(),0x7F));
+    return B.CreateAnd(CI->getOperand(1),
+                       Context->getConstantInt(CI->getType(),0x7F));
   }
 };
 
@@ -1258,12 +1273,14 @@ struct VISIBILITY_HIDDEN PrintFOpt : public LibCallOptimization {
 
     // Empty format string -> noop.
     if (FormatStr.empty())  // Tolerate printf's declared void.
-      return CI->use_empty() ? (Value*)CI : ConstantInt::get(CI->getType(), 0);
+      return CI->use_empty() ? (Value*)CI : 
+                               Context->getConstantInt(CI->getType(), 0);
     
     // printf("x") -> putchar('x'), even for '%'.
     if (FormatStr.size() == 1) {
-      EmitPutChar(ConstantInt::get(Type::Int32Ty, FormatStr[0]), B);
-      return CI->use_empty() ? (Value*)CI : ConstantInt::get(CI->getType(), 1);
+      EmitPutChar(Context->getConstantInt(Type::Int32Ty, FormatStr[0]), B);
+      return CI->use_empty() ? (Value*)CI : 
+                               Context->getConstantInt(CI->getType(), 1);
     }
     
     // printf("foo\n") --> puts("foo")
@@ -1272,12 +1289,12 @@ struct VISIBILITY_HIDDEN PrintFOpt : public LibCallOptimization {
       // Create a string literal with no \n on it.  We expect the constant merge
       // pass to be run after this pass, to merge duplicate strings.
       FormatStr.erase(FormatStr.end()-1);
-      Constant *C = ConstantArray::get(FormatStr, true);
+      Constant *C = Context->getConstantArray(FormatStr, true);
       C = new GlobalVariable(C->getType(), true,GlobalVariable::InternalLinkage,
                              C, "str", Callee->getParent());
       EmitPutS(C, B);
       return CI->use_empty() ? (Value*)CI : 
-                          ConstantInt::get(CI->getType(), FormatStr.size()+1);
+                    Context->getConstantInt(CI->getType(), FormatStr.size()+1);
     }
     
     // Optimize specific format strings.
@@ -1285,7 +1302,8 @@ struct VISIBILITY_HIDDEN PrintFOpt : public LibCallOptimization {
     if (FormatStr == "%c" && CI->getNumOperands() > 2 &&
         isa<IntegerType>(CI->getOperand(2)->getType())) {
       EmitPutChar(CI->getOperand(2), B);
-      return CI->use_empty() ? (Value*)CI : ConstantInt::get(CI->getType(), 1);
+      return CI->use_empty() ? (Value*)CI : 
+                               Context->getConstantInt(CI->getType(), 1);
     }
     
     // printf("%s\n", str) --> puts(str)
@@ -1326,8 +1344,8 @@ struct VISIBILITY_HIDDEN SPrintFOpt : public LibCallOptimization {
       
       // sprintf(str, fmt) -> llvm.memcpy(str, fmt, strlen(fmt)+1, 1)
       EmitMemCpy(CI->getOperand(1), CI->getOperand(2), // Copy the nul byte.
-                 ConstantInt::get(TD->getIntPtrType(), FormatStr.size()+1),1,B);
-      return ConstantInt::get(CI->getType(), FormatStr.size());
+          Context->getConstantInt(TD->getIntPtrType(), FormatStr.size()+1),1,B);
+      return Context->getConstantInt(CI->getType(), FormatStr.size());
     }
     
     // The remaining optimizations require the format string to be "%s" or "%c"
@@ -1342,10 +1360,10 @@ struct VISIBILITY_HIDDEN SPrintFOpt : public LibCallOptimization {
       Value *V = B.CreateTrunc(CI->getOperand(3), Type::Int8Ty, "char");
       Value *Ptr = CastToCStr(CI->getOperand(1), B);
       B.CreateStore(V, Ptr);
-      Ptr = B.CreateGEP(Ptr, ConstantInt::get(Type::Int32Ty, 1), "nul");
-      B.CreateStore(Constant::getNullValue(Type::Int8Ty), Ptr);
+      Ptr = B.CreateGEP(Ptr, Context->getConstantInt(Type::Int32Ty, 1), "nul");
+      B.CreateStore(Context->getNullValue(Type::Int8Ty), Ptr);
       
-      return ConstantInt::get(CI->getType(), 1);
+      return Context->getConstantInt(CI->getType(), 1);
     }
     
     if (FormatStr[1] == 's') {
@@ -1353,7 +1371,8 @@ struct VISIBILITY_HIDDEN SPrintFOpt : public LibCallOptimization {
       if (!isa<PointerType>(CI->getOperand(3)->getType())) return 0;
 
       Value *Len = EmitStrLen(CI->getOperand(3), B);
-      Value *IncLen = B.CreateAdd(Len, ConstantInt::get(Len->getType(), 1),
+      Value *IncLen = B.CreateAdd(Len,
+                                  Context->getConstantInt(Len->getType(), 1),
                                   "leninc");
       EmitMemCpy(CI->getOperand(1), CI->getOperand(3), IncLen, 1, B);
       
@@ -1386,13 +1405,13 @@ struct VISIBILITY_HIDDEN FWriteOpt : public LibCallOptimization {
     
     // If this is writing zero records, remove the call (it's a noop).
     if (Bytes == 0)
-      return ConstantInt::get(CI->getType(), 0);
+      return Context->getConstantInt(CI->getType(), 0);
     
     // If this is writing one byte, turn it into fputc.
     if (Bytes == 1) {  // fwrite(S,1,1,F) -> fputc(S[0],F)
       Value *Char = B.CreateLoad(CastToCStr(CI->getOperand(1), B), "char");
       EmitFPutC(Char, CI->getOperand(4), B);
-      return ConstantInt::get(CI->getType(), 1);
+      return Context->getConstantInt(CI->getType(), 1);
     }
 
     return 0;
@@ -1414,7 +1433,8 @@ struct VISIBILITY_HIDDEN FPutsOpt : public LibCallOptimization {
     // fputs(s,F) --> fwrite(s,1,strlen(s),F)
     uint64_t Len = GetStringLength(CI->getOperand(1));
     if (!Len) return 0;
-    EmitFWrite(CI->getOperand(1), ConstantInt::get(TD->getIntPtrType(), Len-1),
+    EmitFWrite(CI->getOperand(1),
+               Context->getConstantInt(TD->getIntPtrType(), Len-1),
                CI->getOperand(2), B);
     return CI;  // Known to have no uses (see above).
   }
@@ -1443,10 +1463,10 @@ struct VISIBILITY_HIDDEN FPrintFOpt : public LibCallOptimization {
         if (FormatStr[i] == '%')  // Could handle %% -> % if we cared.
           return 0; // We found a format specifier.
       
-      EmitFWrite(CI->getOperand(2), ConstantInt::get(TD->getIntPtrType(),
+      EmitFWrite(CI->getOperand(2), Context->getConstantInt(TD->getIntPtrType(),
                                                      FormatStr.size()),
                  CI->getOperand(1), B);
-      return ConstantInt::get(CI->getType(), FormatStr.size());
+      return Context->getConstantInt(CI->getType(), FormatStr.size());
     }
     
     // The remaining optimizations require the format string to be "%s" or "%c"
@@ -1459,7 +1479,7 @@ struct VISIBILITY_HIDDEN FPrintFOpt : public LibCallOptimization {
       // fprintf(F, "%c", chr) --> *(i8*)dst = chr
       if (!isa<IntegerType>(CI->getOperand(3)->getType())) return 0;
       EmitFPutC(CI->getOperand(3), CI->getOperand(1), B);
-      return ConstantInt::get(CI->getType(), 1);
+      return Context->getConstantInt(CI->getType(), 1);
     }
     
     if (FormatStr[1] == 's') {
diff --git a/lib/VMCore/LLVMContext.cpp b/lib/VMCore/LLVMContext.cpp
index 6af6ff6..fe2cb7b 100644
--- a/lib/VMCore/LLVMContext.cpp
+++ b/lib/VMCore/LLVMContext.cpp
@@ -408,7 +408,8 @@ Constant* LLVMContext::getConstantVector(Constant* const* Vals,
   return ConstantVector::get(Vals, NumVals);
 }
 
-ConstantVector* LLVMContext::getConstantVectorAllOnes(const VectorType* Ty) {
+ConstantVector* LLVMContext::getConstantVectorAllOnesValue(
+                                                         const VectorType* Ty) {
   return ConstantVector::getAllOnesValue(Ty);
 }