Thread LLVMContext through the constant folding APIs, which touches a lot of files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74844 91177308-0d34-0410-b5e6-96231b3b80d8

14 files changed, 92 insertions, 68 deletions

diff --git a/lib/Transforms/IPO/GlobalOpt.cpp b/lib/Transforms/IPO/GlobalOpt.cpp
index 919da78651..0c03676f7d 100644
--- a/lib/Transforms/IPO/GlobalOpt.cpp
+++ b/lib/Transforms/IPO/GlobalOpt.cpp
@@ -282,7 +282,8 @@ static Constant *getAggregateConstantElement(Constant *Agg, Constant *Idx,
 /// users of the global, cleaning up the obvious ones.  This is largely just a
 /// quick scan over the use list to clean up the easy and obvious cruft.  This
 /// returns true if it made a change.
-static bool CleanupConstantGlobalUsers(Value *V, Constant *Init) {
+static bool CleanupConstantGlobalUsers(Value *V, Constant *Init,
+                                       LLVMContext* Context) {
   bool Changed = false;
   for (Value::use_iterator UI = V->use_begin(), E = V->use_end(); UI != E;) {
     User *U = *UI++;
@@ -302,12 +303,12 @@ static bool CleanupConstantGlobalUsers(Value *V, Constant *Init) {
       if (CE->getOpcode() == Instruction::GetElementPtr) {
         Constant *SubInit = 0;
         if (Init)
-          SubInit = ConstantFoldLoadThroughGEPConstantExpr(Init, CE);
-        Changed |= CleanupConstantGlobalUsers(CE, SubInit);
+          SubInit = ConstantFoldLoadThroughGEPConstantExpr(Init, CE, Context);
+        Changed |= CleanupConstantGlobalUsers(CE, SubInit, Context);
       } else if (CE->getOpcode() == Instruction::BitCast && 
                  isa<PointerType>(CE->getType())) {
         // Pointer cast, delete any stores and memsets to the global.
-        Changed |= CleanupConstantGlobalUsers(CE, 0);
+        Changed |= CleanupConstantGlobalUsers(CE, 0, Context);
       }
 
       if (CE->use_empty()) {
@@ -321,11 +322,11 @@ static bool CleanupConstantGlobalUsers(Value *V, Constant *Init) {
       Constant *SubInit = 0;
       if (!isa<ConstantExpr>(GEP->getOperand(0))) {
         ConstantExpr *CE = 
-          dyn_cast_or_null<ConstantExpr>(ConstantFoldInstruction(GEP));
+          dyn_cast_or_null<ConstantExpr>(ConstantFoldInstruction(GEP, Context));
         if (Init && CE && CE->getOpcode() == Instruction::GetElementPtr)
-          SubInit = ConstantFoldLoadThroughGEPConstantExpr(Init, CE);
+          SubInit = ConstantFoldLoadThroughGEPConstantExpr(Init, CE, Context);
       }
-      Changed |= CleanupConstantGlobalUsers(GEP, SubInit);
+      Changed |= CleanupConstantGlobalUsers(GEP, SubInit, Context);
 
       if (GEP->use_empty()) {
         GEP->eraseFromParent();
@@ -343,7 +344,7 @@ static bool CleanupConstantGlobalUsers(Value *V, Constant *Init) {
       if (SafeToDestroyConstant(C)) {
         C->destroyConstant();
         // This could have invalidated UI, start over from scratch.
-        CleanupConstantGlobalUsers(V, Init);
+        CleanupConstantGlobalUsers(V, Init, Context);
         return true;
       }
     }
@@ -783,7 +784,7 @@ static bool OptimizeAwayTrappingUsesOfLoads(GlobalVariable *GV, Constant *LV,
   // nor is the global.
   if (AllNonStoreUsesGone) {
     DOUT << "  *** GLOBAL NOW DEAD!\n";
-    CleanupConstantGlobalUsers(GV, 0);
+    CleanupConstantGlobalUsers(GV, 0, Context);
     if (GV->use_empty()) {
       GV->eraseFromParent();
       ++NumDeleted;
@@ -795,10 +796,10 @@ static bool OptimizeAwayTrappingUsesOfLoads(GlobalVariable *GV, Constant *LV,
 
 /// ConstantPropUsersOf - Walk the use list of V, constant folding all of the
 /// instructions that are foldable.
-static void ConstantPropUsersOf(Value *V) {
+static void ConstantPropUsersOf(Value *V, LLVMContext* Context) {
   for (Value::use_iterator UI = V->use_begin(), E = V->use_end(); UI != E; )
     if (Instruction *I = dyn_cast<Instruction>(*UI++))
-      if (Constant *NewC = ConstantFoldInstruction(I)) {
+      if (Constant *NewC = ConstantFoldInstruction(I, Context)) {
         I->replaceAllUsesWith(NewC);
 
         // Advance UI to the next non-I use to avoid invalidating it!
@@ -925,9 +926,9 @@ static GlobalVariable *OptimizeGlobalAddressOfMalloc(GlobalVariable *GV,
   // To further other optimizations, loop over all users of NewGV and try to
   // constant prop them.  This will promote GEP instructions with constant
   // indices into GEP constant-exprs, which will allow global-opt to hack on it.
-  ConstantPropUsersOf(NewGV);
+  ConstantPropUsersOf(NewGV, Context);
   if (RepValue != NewGV)
-    ConstantPropUsersOf(RepValue);
+    ConstantPropUsersOf(RepValue, Context);
 
   return NewGV;
 }
@@ -1717,7 +1718,8 @@ bool GlobalOpt::ProcessInternalGlobal(GlobalVariable *GV,
 
       // Delete any stores we can find to the global.  We may not be able to
       // make it completely dead though.
-      bool Changed = CleanupConstantGlobalUsers(GV, GV->getInitializer());
+      bool Changed = CleanupConstantGlobalUsers(GV, GV->getInitializer(), 
+                                                Context);
 
       // If the global is dead now, delete it.
       if (GV->use_empty()) {
@@ -1732,7 +1734,7 @@ bool GlobalOpt::ProcessInternalGlobal(GlobalVariable *GV,
       GV->setConstant(true);
 
       // Clean up any obviously simplifiable users now.
-      CleanupConstantGlobalUsers(GV, GV->getInitializer());
+      CleanupConstantGlobalUsers(GV, GV->getInitializer(), Context);
 
       // If the global is dead now, just nuke it.
       if (GV->use_empty()) {
@@ -1762,7 +1764,7 @@ bool GlobalOpt::ProcessInternalGlobal(GlobalVariable *GV,
           GV->setInitializer(SOVConstant);
 
           // Clean up any obviously simplifiable users now.
-          CleanupConstantGlobalUsers(GV, GV->getInitializer());
+          CleanupConstantGlobalUsers(GV, GV->getInitializer(), Context);
 
           if (GV->use_empty()) {
             DOUT << "   *** Substituting initializer allowed us to "
@@ -2007,7 +2009,7 @@ static Constant *getVal(DenseMap<Value*, Constant*> &ComputedValues,
 /// enough for us to understand.  In particular, if it is a cast of something,
 /// we punt.  We basically just support direct accesses to globals and GEP's of
 /// globals.  This should be kept up to date with CommitValueTo.
-static bool isSimpleEnoughPointerToCommit(Constant *C) {
+static bool isSimpleEnoughPointerToCommit(Constant *C, LLVMContext* Context) {
   if (GlobalVariable *GV = dyn_cast<GlobalVariable>(C)) {
     if (!GV->hasExternalLinkage() && !GV->hasLocalLinkage())
       return false;  // do not allow weak/linkonce/dllimport/dllexport linkage.
@@ -2021,7 +2023,8 @@ static bool isSimpleEnoughPointerToCommit(Constant *C) {
       if (!GV->hasExternalLinkage() && !GV->hasLocalLinkage())
         return false;  // do not allow weak/linkonce/dllimport/dllexport linkage.
       return GV->hasInitializer() &&
-             ConstantFoldLoadThroughGEPConstantExpr(GV->getInitializer(), CE);
+             ConstantFoldLoadThroughGEPConstantExpr(GV->getInitializer(), CE,
+                                                    Context);
     }
   return false;
 }
@@ -2113,7 +2116,8 @@ static void CommitValueTo(Constant *Val, Constant *Addr,
 /// P after the stores reflected by 'memory' have been performed.  If we can't
 /// decide, return null.
 static Constant *ComputeLoadResult(Constant *P,
-                                const DenseMap<Constant*, Constant*> &Memory) {
+                                const DenseMap<Constant*, Constant*> &Memory,
+                                LLVMContext* Context) {
   // If this memory location has been recently stored, use the stored value: it
   // is the most up-to-date.
   DenseMap<Constant*, Constant*>::const_iterator I = Memory.find(P);
@@ -2132,7 +2136,8 @@ static Constant *ComputeLoadResult(Constant *P,
         isa<GlobalVariable>(CE->getOperand(0))) {
       GlobalVariable *GV = cast<GlobalVariable>(CE->getOperand(0));
       if (GV->hasInitializer())
-        return ConstantFoldLoadThroughGEPConstantExpr(GV->getInitializer(), CE);
+        return ConstantFoldLoadThroughGEPConstantExpr(GV->getInitializer(), CE,
+                                                      Context);
     }
 
   return 0;  // don't know how to evaluate.
@@ -2179,7 +2184,7 @@ static bool EvaluateFunction(Function *F, Constant *&RetVal,
     if (StoreInst *SI = dyn_cast<StoreInst>(CurInst)) {
       if (SI->isVolatile()) return false;  // no volatile accesses.
       Constant *Ptr = getVal(Values, SI->getOperand(1));
-      if (!isSimpleEnoughPointerToCommit(Ptr))
+      if (!isSimpleEnoughPointerToCommit(Ptr, Context))
         // If this is too complex for us to commit, reject it.
         return false;
       Constant *Val = getVal(Values, SI->getOperand(0));
@@ -2212,7 +2217,7 @@ static bool EvaluateFunction(Function *F, Constant *&RetVal,
     } else if (LoadInst *LI = dyn_cast<LoadInst>(CurInst)) {
       if (LI->isVolatile()) return false;  // no volatile accesses.
       InstResult = ComputeLoadResult(getVal(Values, LI->getOperand(0)),
-                                     MutatedMemory);
+                                     MutatedMemory, Context);
       if (InstResult == 0) return false; // Could not evaluate load.
     } else if (AllocaInst *AI = dyn_cast<AllocaInst>(CurInst)) {
       if (AI->isArrayAllocation()) return false;  // Cannot handle array allocs.
diff --git a/lib/Transforms/Instrumentation/BlockProfiling.cpp b/lib/Transforms/Instrumentation/BlockProfiling.cpp
index 2bd9809a39..913680cdd0 100644
--- a/lib/Transforms/Instrumentation/BlockProfiling.cpp
+++ b/lib/Transforms/Instrumentation/BlockProfiling.cpp
@@ -21,6 +21,7 @@
 
 #include "llvm/Constants.h"
 #include "llvm/DerivedTypes.h"
+#include "llvm/LLVMContext.h"
 #include "llvm/Module.h"
 #include "llvm/Pass.h"
 #include "llvm/Support/Compiler.h"
@@ -62,10 +63,10 @@ bool FunctionProfiler::runOnModule(Module &M) {
     if (!I->isDeclaration())
       ++NumFunctions;
 
-  const Type *ATy = ArrayType::get(Type::Int32Ty, NumFunctions);
+  const Type *ATy = Context->getArrayType(Type::Int32Ty, NumFunctions);
   GlobalVariable *Counters =
     new GlobalVariable(ATy, false, GlobalValue::InternalLinkage,
-                       Constant::getNullValue(ATy), "FuncProfCounters", &M);
+                       Context->getNullValue(ATy), "FuncProfCounters", &M);
 
   // Instrument all of the functions...
   unsigned i = 0;
@@ -107,10 +108,10 @@ bool BlockProfiler::runOnModule(Module &M) {
   for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
     NumBlocks += I->size();
 
-  const Type *ATy = ArrayType::get(Type::Int32Ty, NumBlocks);
+  const Type *ATy = Context->getArrayType(Type::Int32Ty, NumBlocks);
   GlobalVariable *Counters =
     new GlobalVariable(ATy, false, GlobalValue::InternalLinkage,
-                       Constant::getNullValue(ATy), "BlockProfCounters", &M);
+                       Context->getNullValue(ATy), "BlockProfCounters", &M);
 
   // Instrument all of the blocks...
   unsigned i = 0;
diff --git a/lib/Transforms/Instrumentation/EdgeProfiling.cpp b/lib/Transforms/Instrumentation/EdgeProfiling.cpp
index 0831f3b7a4..88825b164c 100644
--- a/lib/Transforms/Instrumentation/EdgeProfiling.cpp
+++ b/lib/Transforms/Instrumentation/EdgeProfiling.cpp
@@ -20,6 +20,7 @@
 #include "ProfilingUtils.h"
 #include "llvm/Constants.h"
 #include "llvm/DerivedTypes.h"
+#include "llvm/LLVMContext.h"
 #include "llvm/Module.h"
 #include "llvm/Pass.h"
 #include "llvm/Support/Compiler.h"
@@ -63,10 +64,10 @@ bool EdgeProfiler::runOnModule(Module &M) {
       NumEdges += BB->getTerminator()->getNumSuccessors();
     }
 
-  const Type *ATy = ArrayType::get(Type::Int32Ty, NumEdges);
+  const Type *ATy = Context->getArrayType(Type::Int32Ty, NumEdges);
   GlobalVariable *Counters =
     new GlobalVariable(ATy, false, GlobalValue::InternalLinkage,
-                       Constant::getNullValue(ATy), "EdgeProfCounters", &M);
+                       Context->getNullValue(ATy), "EdgeProfCounters", &M);
 
   // Instrument all of the edges...
   unsigned i = 0;
diff --git a/lib/Transforms/Instrumentation/ProfilingUtils.cpp b/lib/Transforms/Instrumentation/ProfilingUtils.cpp
index 48071f1156..8ae4c4f078 100644
--- a/lib/Transforms/Instrumentation/ProfilingUtils.cpp
+++ b/lib/Transforms/Instrumentation/ProfilingUtils.cpp
@@ -18,13 +18,15 @@
 #include "llvm/Constants.h"
 #include "llvm/DerivedTypes.h"
 #include "llvm/Instructions.h"
+#include "llvm/LLVMContext.h"
 #include "llvm/Module.h"
 
 void llvm::InsertProfilingInitCall(Function *MainFn, const char *FnName,
                                    GlobalValue *Array) {
+  LLVMContext* Context = MainFn->getContext();
   const Type *ArgVTy = 
-    PointerType::getUnqual(PointerType::getUnqual(Type::Int8Ty));
-  const PointerType *UIntPtr = PointerType::getUnqual(Type::Int32Ty);
+    Context->getPointerTypeUnqual(Context->getPointerTypeUnqual(Type::Int8Ty));
+  const PointerType *UIntPtr = Context->getPointerTypeUnqual(Type::Int32Ty);
   Module &M = *MainFn->getParent();
   Constant *InitFn = M.getOrInsertFunction(FnName, Type::Int32Ty, Type::Int32Ty,
                                            ArgVTy, UIntPtr, Type::Int32Ty,
@@ -33,27 +35,27 @@ void llvm::InsertProfilingInitCall(Function *MainFn, const char *FnName,
   // This could force argc and argv into programs that wouldn't otherwise have
   // them, but instead we just pass null values in.
   std::vector<Value*> Args(4);
-  Args[0] = Constant::getNullValue(Type::Int32Ty);
-  Args[1] = Constant::getNullValue(ArgVTy);
+  Args[0] = Context->getNullValue(Type::Int32Ty);
+  Args[1] = Context->getNullValue(ArgVTy);
 
   // Skip over any allocas in the entry block.
   BasicBlock *Entry = MainFn->begin();
   BasicBlock::iterator InsertPos = Entry->begin();
   while (isa<AllocaInst>(InsertPos)) ++InsertPos;
 
-  std::vector<Constant*> GEPIndices(2, Constant::getNullValue(Type::Int32Ty));
+  std::vector<Constant*> GEPIndices(2, Context->getNullValue(Type::Int32Ty));
   unsigned NumElements = 0;
   if (Array) {
-    Args[2] = ConstantExpr::getGetElementPtr(Array, &GEPIndices[0],
+    Args[2] = Context->getConstantExprGetElementPtr(Array, &GEPIndices[0],
                                              GEPIndices.size());
     NumElements =
       cast<ArrayType>(Array->getType()->getElementType())->getNumElements();
   } else {
     // If this profiling instrumentation doesn't have a constant array, just
     // pass null.
-    Args[2] = ConstantPointerNull::get(UIntPtr);
+    Args[2] = Context->getConstantPointerNull(UIntPtr);
   }
-  Args[3] = ConstantInt::get(Type::Int32Ty, NumElements);
+  Args[3] = Context->getConstantInt(Type::Int32Ty, NumElements);
 
   Instruction *InitCall = CallInst::Create(InitFn, Args.begin(), Args.end(),
                                            "newargc", InsertPos);
@@ -99,6 +101,8 @@ void llvm::InsertProfilingInitCall(Function *MainFn, const char *FnName,
 
 void llvm::IncrementCounterInBlock(BasicBlock *BB, unsigned CounterNum,
                                    GlobalValue *CounterArray) {
+  LLVMContext* Context = BB->getContext();
+
   // Insert the increment after any alloca or PHI instructions...
   BasicBlock::iterator InsertPos = BB->getFirstNonPHI();
   while (isa<AllocaInst>(InsertPos))
@@ -106,15 +110,16 @@ void llvm::IncrementCounterInBlock(BasicBlock *BB, unsigned CounterNum,
 
   // Create the getelementptr constant expression
   std::vector<Constant*> Indices(2);
-  Indices[0] = Constant::getNullValue(Type::Int32Ty);
-  Indices[1] = ConstantInt::get(Type::Int32Ty, CounterNum);
+  Indices[0] = Context->getNullValue(Type::Int32Ty);
+  Indices[1] = Context->getConstantInt(Type::Int32Ty, CounterNum);
   Constant *ElementPtr = 
-    ConstantExpr::getGetElementPtr(CounterArray, &Indices[0], Indices.size());
+    Context->getConstantExprGetElementPtr(CounterArray, &Indices[0],
+                                          Indices.size());
 
   // Load, increment and store the value back.
   Value *OldVal = new LoadInst(ElementPtr, "OldFuncCounter", InsertPos);
   Value *NewVal = BinaryOperator::Create(Instruction::Add, OldVal,
-                                         ConstantInt::get(Type::Int32Ty, 1),
+                                      Context->getConstantInt(Type::Int32Ty, 1),
                                          "NewFuncCounter", InsertPos);
   new StoreInst(NewVal, ElementPtr, InsertPos);
 }
diff --git a/lib/Transforms/Instrumentation/RSProfiling.cpp b/lib/Transforms/Instrumentation/RSProfiling.cpp
index b110f4eb36..5f95f29ea1 100644
--- a/lib/Transforms/Instrumentation/RSProfiling.cpp
+++ b/lib/Transforms/Instrumentation/RSProfiling.cpp
@@ -33,6 +33,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Pass.h"
+#include "llvm/LLVMContext.h"
 #include "llvm/Module.h"
 #include "llvm/Instructions.h"
 #include "llvm/Constants.h"
@@ -195,7 +196,7 @@ static void getBackEdges(Function& F, T& BackEdges);
   
 GlobalRandomCounter::GlobalRandomCounter(Module& M, const IntegerType* t,
                                          uint64_t resetval) : T(t) {
-  ConstantInt* Init = ConstantInt::get(T, resetval); 
+  ConstantInt* Init = M.getContext().getConstantInt(T, resetval); 
   ResetValue = Init;
   Counter = new GlobalVariable(T, false, GlobalValue::InternalLinkage,
                                Init, "RandomSteeringCounter", &M);
@@ -207,14 +208,16 @@ void GlobalRandomCounter::PrepFunction(Function* F) {}
 
 void GlobalRandomCounter::ProcessChoicePoint(BasicBlock* bb) {
   BranchInst* t = cast<BranchInst>(bb->getTerminator());
+  LLVMContext* Context = bb->getContext();
   
   //decrement counter
   LoadInst* l = new LoadInst(Counter, "counter", t);
   
-  ICmpInst* s = new ICmpInst(ICmpInst::ICMP_EQ, l, ConstantInt::get(T, 0), 
+  ICmpInst* s = new ICmpInst(ICmpInst::ICMP_EQ, l,
+                             Context->getConstantInt(T, 0), 
                              "countercc", t);
 
-  Value* nv = BinaryOperator::CreateSub(l, ConstantInt::get(T, 1),
+  Value* nv = BinaryOperator::CreateSub(l, Context->getConstantInt(T, 1),
                                         "counternew", t);
   new StoreInst(nv, Counter, t);
   t->setCondition(s);
@@ -232,7 +235,7 @@ void GlobalRandomCounter::ProcessChoicePoint(BasicBlock* bb) {
 GlobalRandomCounterOpt::GlobalRandomCounterOpt(Module& M, const IntegerType* t,
                                                uint64_t resetval) 
   : AI(0), T(t) {
-  ConstantInt* Init = ConstantInt::get(T, resetval);
+  ConstantInt* Init = M.getContext().getConstantInt(T, resetval);
   ResetValue  = Init;
   Counter = new GlobalVariable(T, false, GlobalValue::InternalLinkage,
                                Init, "RandomSteeringCounter", &M);
@@ -279,14 +282,16 @@ void GlobalRandomCounterOpt::PrepFunction(Function* F) {
 
 void GlobalRandomCounterOpt::ProcessChoicePoint(BasicBlock* bb) {
   BranchInst* t = cast<BranchInst>(bb->getTerminator());
+  LLVMContext* Context = bb->getContext();
   
   //decrement counter
   LoadInst* l = new LoadInst(AI, "counter", t);
   
-  ICmpInst* s = new ICmpInst(ICmpInst::ICMP_EQ, l, ConstantInt::get(T, 0), 
+  ICmpInst* s = new ICmpInst(ICmpInst::ICMP_EQ, l,
+                             Context->getConstantInt(T, 0), 
                              "countercc", t);
 
-  Value* nv = BinaryOperator::CreateSub(l, ConstantInt::get(T, 1),
+  Value* nv = BinaryOperator::CreateSub(l, Context->getConstantInt(T, 1),
                                         "counternew", t);
   new StoreInst(nv, AI, t);
   t->setCondition(s);
@@ -312,14 +317,15 @@ void CycleCounter::PrepFunction(Function* F) {}
 
 void CycleCounter::ProcessChoicePoint(BasicBlock* bb) {
   BranchInst* t = cast<BranchInst>(bb->getTerminator());
+  LLVMContext* Context = bb->getContext();
   
   CallInst* c = CallInst::Create(F, "rdcc", t);
   BinaryOperator* b = 
-    BinaryOperator::CreateAnd(c, ConstantInt::get(Type::Int64Ty, rm),
+    BinaryOperator::CreateAnd(c, Context->getConstantInt(Type::Int64Ty, rm),
                               "mrdcc", t);
   
   ICmpInst *s = new ICmpInst(ICmpInst::ICMP_EQ, b,
-                             ConstantInt::get(Type::Int64Ty, 0), 
+                             Context->getConstantInt(Type::Int64Ty, 0), 
                              "mrdccc", t);
 
   t->setCondition(s);
@@ -345,16 +351,16 @@ void RSProfilers_std::IncrementCounterInBlock(BasicBlock *BB, unsigned CounterNu
   
   // Create the getelementptr constant expression
   std::vector<Constant*> Indices(2);
-  Indices[0] = Constant::getNullValue(Type::Int32Ty);
-  Indices[1] = ConstantInt::get(Type::Int32Ty, CounterNum);
-  Constant *ElementPtr = ConstantExpr::getGetElementPtr(CounterArray,
+  Indices[0] = Context->getNullValue(Type::Int32Ty);
+  Indices[1] = Context->getConstantInt(Type::Int32Ty, CounterNum);
+  Constant *ElementPtr = Context->getConstantExprGetElementPtr(CounterArray,
                                                         &Indices[0], 2);
   
   // Load, increment and store the value back.
   Value *OldVal = new LoadInst(ElementPtr, "OldCounter", InsertPos);
   profcode.insert(OldVal);
   Value *NewVal = BinaryOperator::CreateAdd(OldVal,
-                                            ConstantInt::get(Type::Int32Ty, 1),
+                                     Context->getConstantInt(Type::Int32Ty, 1),
                                             "NewCounter", InsertPos);
   profcode.insert(NewVal);
   profcode.insert(new StoreInst(NewVal, ElementPtr, InsertPos));
@@ -475,7 +481,7 @@ void ProfilerRS::ProcessBackEdge(BasicBlock* src, BasicBlock* dst, Function& F)
   //b:
   BranchInst::Create(cast<BasicBlock>(Translate(dst)), bbC);
   BranchInst::Create(dst, cast<BasicBlock>(Translate(dst)), 
-                     ConstantInt::get(Type::Int1Ty, true), bbCp);
+                     Context->getConstantInt(Type::Int1Ty, true), bbCp);
   //c:
   {
     TerminatorInst* iB = src->getTerminator();
@@ -532,7 +538,7 @@ bool ProfilerRS::runOnFunction(Function& F) {
     ReplaceInstWithInst(T, BranchInst::Create(T->getSuccessor(0),
                                               cast<BasicBlock>(
                                                 Translate(T->getSuccessor(0))),
-                                              ConstantInt::get(Type::Int1Ty,
+                                          Context->getConstantInt(Type::Int1Ty,
                                                                true)));
     
     //do whatever is needed now that the function is duplicated
diff --git a/lib/Transforms/Scalar/ConstantProp.cpp b/lib/Transforms/Scalar/ConstantProp.cpp
index b933488cf6..d92ebdae66 100644
--- a/lib/Transforms/Scalar/ConstantProp.cpp
+++ b/lib/Transforms/Scalar/ConstantProp.cpp
@@ -67,7 +67,7 @@ bool ConstantPropagation::runOnFunction(Function &F) {
     WorkList.erase(WorkList.begin());    // Get an element from the worklist...
 
     if (!I->use_empty())                 // Don't muck with dead instructions...
-      if (Constant *C = ConstantFoldInstruction(I)) {
+      if (Constant *C = ConstantFoldInstruction(I, Context)) {
         // Add all of the users of this instruction to the worklist, they might
         // be constant propagatable now...
         for (Value::use_iterator UI = I->use_begin(), UE = I->use_end();
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp
index 59fbd396a3..46a7b4c30d 100644
--- a/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -11598,7 +11598,8 @@ Instruction *InstCombiner::visitLoadInst(LoadInst &LI) {
         if (GlobalVariable *GV = dyn_cast<GlobalVariable>(CE->getOperand(0)))
           if (GV->isConstant() && GV->hasDefinitiveInitializer())
             if (Constant *V = 
-               ConstantFoldLoadThroughGEPConstantExpr(GV->getInitializer(), CE))
+               ConstantFoldLoadThroughGEPConstantExpr(GV->getInitializer(), CE, 
+                                                      Context))
               return ReplaceInstUsesWith(LI, V);
         if (CE->getOperand(0)->isNullValue()) {
           // Insert a new store to null instruction before the load to indicate
@@ -12876,7 +12877,7 @@ static void AddReachableCodeToWorklist(BasicBlock *BB,
       }
       
       // ConstantProp instruction if trivially constant.
-      if (Constant *C = ConstantFoldInstruction(Inst, TD)) {
+      if (Constant *C = ConstantFoldInstruction(Inst, BB->getContext(), TD)) {
         DOUT << "IC: ConstFold to: " << *C << " from: " << *Inst;
         Inst->replaceAllUsesWith(C);
         ++NumConstProp;
@@ -12991,7 +12992,7 @@ bool InstCombiner::DoOneIteration(Function &F, unsigned Iteration) {
     }
 
     // Instruction isn't dead, see if we can constant propagate it.
-    if (Constant *C = ConstantFoldInstruction(I, TD)) {
+    if (Constant *C = ConstantFoldInstruction(I, F.getContext(), TD)) {
       DOUT << "IC: ConstFold to: " << *C << " from: " << *I;
 
       // Add operands to the worklist.
@@ -13011,7 +13012,8 @@ bool InstCombiner::DoOneIteration(Function &F, unsigned Iteration) {
       // See if we can constant fold its operands.
       for (User::op_iterator i = I->op_begin(), e = I->op_end(); i != e; ++i)
         if (ConstantExpr *CE = dyn_cast<ConstantExpr>(i))
-          if (Constant *NewC = ConstantFoldConstantExpression(CE, TD))
+          if (Constant *NewC = ConstantFoldConstantExpression(CE,   
+                                  F.getContext(), TD))
             if (NewC != CE) {
               i->set(NewC);
               Changed = true;
diff --git a/lib/Transforms/Scalar/JumpThreading.cpp b/lib/Transforms/Scalar/JumpThreading.cpp
index dee7bfba21..2252042320 100644
--- a/lib/Transforms/Scalar/JumpThreading.cpp
+++ b/lib/Transforms/Scalar/JumpThreading.cpp
@@ -982,7 +982,7 @@ bool JumpThreading::ThreadEdge(BasicBlock *BB, BasicBlock *PredBB,
   BI = NewBB->begin();
   for (BasicBlock::iterator E = NewBB->end(); BI != E; ) {
     Instruction *Inst = BI++;
-    if (Constant *C = ConstantFoldInstruction(Inst, TD)) {
+    if (Constant *C = ConstantFoldInstruction(Inst, BB->getContext(), TD)) {
       Inst->replaceAllUsesWith(C);
       Inst->eraseFromParent();
       continue;
diff --git a/lib/Transforms/Scalar/LoopUnswitch.cpp b/lib/Transforms/Scalar/LoopUnswitch.cpp
index de5eedf1e8..b8e44799ba 100644
--- a/lib/Transforms/Scalar/LoopUnswitch.cpp
+++ b/lib/Transforms/Scalar/LoopUnswitch.cpp
@@ -986,7 +986,7 @@ void LoopUnswitch::SimplifyCode(std::vector<Instruction*> &Worklist, Loop *L) {
     Worklist.pop_back();
     
     // Simple constant folding.
-    if (Constant *C = ConstantFoldInstruction(I)) {
+    if (Constant *C = ConstantFoldInstruction(I, Context)) {
       ReplaceUsesOfWith(I, C, Worklist, L, LPM);
       continue;
     }
diff --git a/lib/Transforms/Scalar/SCCP.cpp b/lib/Transforms/Scalar/SCCP.cpp
index f0bc127347..7363c71f7c 100644
--- a/lib/Transforms/Scalar/SCCP.cpp
+++ b/lib/Transforms/Scalar/SCCP.cpp
@@ -1158,7 +1158,8 @@ void SCCPSolver::visitLoadInst(LoadInst &I) {
     if (GlobalVariable *GV = dyn_cast<GlobalVariable>(CE->getOperand(0)))
       if (GV->isConstant() && GV->hasDefinitiveInitializer())
         if (Constant *V =
-             ConstantFoldLoadThroughGEPConstantExpr(GV->getInitializer(), CE)) {
+             ConstantFoldLoadThroughGEPConstantExpr(GV->getInitializer(), CE,
+                                                    Context)) {
           markConstant(IV, &I, V);
           return;
         }
diff --git a/lib/Transforms/Scalar/TailDuplication.cpp b/lib/Transforms/Scalar/TailDuplication.cpp
index c037ee9603..06815d29b2 100644
--- a/lib/Transforms/Scalar/TailDuplication.cpp
+++ b/lib/Transforms/Scalar/TailDuplication.cpp
@@ -358,7 +358,7 @@ void TailDup::eliminateUnconditionalBranch(BranchInst *Branch) {
       Instruction *Inst = BI++;
       if (isInstructionTriviallyDead(Inst))
         Inst->eraseFromParent();
-      else if (Constant *C = ConstantFoldInstruction(Inst)) {
+      else if (Constant *C = ConstantFoldInstruction(Inst, Context)) {
         Inst->replaceAllUsesWith(C);
         Inst->eraseFromParent();
       }
diff --git a/lib/Transforms/Utils/CloneFunction.cpp b/lib/Transforms/Utils/CloneFunction.cpp
index c8f4efd05f..de1463b9b2 100644
--- a/lib/Transforms/Utils/CloneFunction.cpp
+++ b/lib/Transforms/Utils/CloneFunction.cpp
@@ -338,7 +338,8 @@ ConstantFoldMappedInstruction(const Instruction *I) {
 
   if (const CmpInst *CI = dyn_cast<CmpInst>(I))
     return ConstantFoldCompareInstOperands(CI->getPredicate(),
-                                           &Ops[0], Ops.size(), TD);
+                                           &Ops[0], Ops.size(), 
+                                           Context, TD);
 
   if (const LoadInst *LI = dyn_cast<LoadInst>(I))
     if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Ops[0]))
@@ -346,10 +347,10 @@ ConstantFoldMappedInstruction(const Instruction *I) {
         if (GlobalVariable *GV = dyn_cast<GlobalVariable>(CE->getOperand(0)))
           if (GV->isConstant() && GV->hasDefinitiveInitializer())
             return ConstantFoldLoadThroughGEPConstantExpr(GV->getInitializer(),
-                                                          CE);
+                                                          CE, Context);
 
   return ConstantFoldInstOperands(I->getOpcode(), I->getType(), &Ops[0],
-                                  Ops.size(), TD);
+                                  Ops.size(), Context, TD);
 }
 
 /// CloneAndPruneFunctionInto - This works exactly like CloneFunctionInto,
diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp
index 2aeb0bb1ce..2e526901dc 100644
--- a/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -1178,6 +1178,7 @@ static bool BlockIsSimpleEnoughToThreadThrough(BasicBlock *BB) {
 /// ultimate destination.
 static bool FoldCondBranchOnPHI(BranchInst *BI) {
   BasicBlock *BB = BI->getParent();
+  LLVMContext* Context = BB->getContext();
   PHINode *PN = dyn_cast<PHINode>(BI->getCondition());
   // NOTE: we currently cannot transform this case if the PHI node is used
   // outside of the block.
@@ -1243,7 +1244,7 @@ static bool FoldCondBranchOnPHI(BranchInst *BI) {
           }
           
           // Check for trivial simplification.
-          if (Constant *C = ConstantFoldInstruction(N)) {
+          if (Constant *C = ConstantFoldInstruction(N, Context)) {
             TranslateMap[BBI] = C;
             delete N;   // Constant folded away, don't need actual inst
           } else {
diff --git a/lib/Transforms/Utils/UnrollLoop.cpp b/lib/Transforms/Utils/UnrollLoop.cpp
index caef7ec5c4..6b012f6c4e 100644
--- a/lib/Transforms/Utils/UnrollLoop.cpp
+++ b/lib/Transforms/Utils/UnrollLoop.cpp
@@ -349,7 +349,8 @@ bool llvm::UnrollLoop(Loop *L, unsigned Count, LoopInfo* LI, LPPassManager* LPM)
 
       if (isInstructionTriviallyDead(Inst))
         (*BB)->getInstList().erase(Inst);
-      else if (Constant *C = ConstantFoldInstruction(Inst)) {
+      else if (Constant *C = ConstantFoldInstruction(Inst, 
+                                                     Header->getContext())) {
         Inst->replaceAllUsesWith(C);
         (*BB)->getInstList().erase(Inst);
       }