Merge LLVMBuilder and FoldingBuilder, calling

the result IRBuilder.  Patch by Dominic Hamon.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49604 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 527 insertions, 0 deletions

diff --git a/include/llvm/Support/IRBuilder.h b/include/llvm/Support/IRBuilder.h
new file mode 100644
index 0000000000..4dfc14b89a
--- /dev/null
+++ b/include/llvm/Support/IRBuilder.h
@@ -0,0 +1,527 @@
+//===---- llvm/Support/IRBuilder.h - Builder for LLVM Instrs ----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the IRBuilder class, which is used as a convenient way
+// to create LLVM instructions with a consistent and simplified interface.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_IRBUILDER_H
+#define LLVM_SUPPORT_IRBUILDER_H
+
+#include "llvm/BasicBlock.h"
+#include "llvm/Instructions.h"
+#include "llvm/Constants.h"
+
+namespace llvm {
+
+/// IRBuilder - This provides a uniform API for creating instructions and
+/// inserting them into a basic block: either at the end of a BasicBlock, or 
+/// at a specific iterator location in a block.
+///
+/// Note that the builder does not expose the full generality of LLVM
+/// instructions.  For example, it cannot be used to create instructions with
+/// arbitrary names (specifically, names with nul characters in them) - It only
+/// supports nul-terminated C strings.  For fully generic names, use
+/// I->setName().  For access to extra instruction properties, use the mutators
+/// (e.g. setVolatile) on the instructions after they have been created.
+class IRBuilder {
+  BasicBlock *BB;
+  BasicBlock::iterator InsertPt;
+public:
+  IRBuilder() { ClearInsertionPoint(); }
+  explicit IRBuilder(BasicBlock *TheBB) { SetInsertPoint(TheBB); }
+  IRBuilder(BasicBlock *TheBB, BasicBlock::iterator IP) {
+    SetInsertPoint(TheBB, IP);
+  }
+
+  //===--------------------------------------------------------------------===//
+  // Builder configuration methods
+  //===--------------------------------------------------------------------===//
+
+  /// ClearInsertionPoint - Clear the insertion point: created instructions will
+  /// not be inserted into a block.
+  void ClearInsertionPoint() {
+    BB = 0;
+  }
+  
+  BasicBlock *GetInsertBlock() const { return BB; }
+  
+  /// SetInsertPoint - This specifies that created instructions should be
+  /// appended to the end of the specified block.
+  void SetInsertPoint(BasicBlock *TheBB) {
+    BB = TheBB;
+    InsertPt = BB->end();
+  }
+  
+  /// SetInsertPoint - This specifies that created instructions should be
+  /// inserted at the specified point.
+  void SetInsertPoint(BasicBlock *TheBB, BasicBlock::iterator IP) {
+    BB = TheBB;
+    InsertPt = IP;
+  }
+  
+  /// Insert - Insert and return the specified instruction.
+  template<typename InstTy>
+  InstTy *Insert(InstTy *I) const {
+    InsertHelper(I);
+    return I;
+  }
+  
+  /// InsertHelper - Insert the specified instruction at the specified insertion
+  /// point.  This is split out of Insert so that it isn't duplicated for every
+  /// template instantiation.
+  void InsertHelper(Instruction *I) const {
+    if (BB) BB->getInstList().insert(InsertPt, I);
+  }
+  
+  //===--------------------------------------------------------------------===//
+  // Instruction creation methods: Terminators
+  //===--------------------------------------------------------------------===//
+
+  /// CreateRetVoid - Create a 'ret void' instruction.
+  ReturnInst *CreateRetVoid() {
+    return Insert(ReturnInst::Create());
+  }
+
+  /// @verbatim 
+  /// CreateRet - Create a 'ret <val>' instruction. 
+  /// @endverbatim
+  ReturnInst *CreateRet(Value *V) {
+    return Insert(ReturnInst::Create(V));
+  }
+
+  ReturnInst *CreateRet(Value * const* retVals, unsigned N) {
+    return Insert(ReturnInst::Create(retVals,  N));
+  }
+  
+  GetResultInst *CreateGetResult(Value *V, unsigned Index, 
+                                 const char *Name = "") {
+    return Insert(new GetResultInst(V, Index, Name));
+  }
+    
+  /// CreateBr - Create an unconditional 'br label X' instruction.
+  BranchInst *CreateBr(BasicBlock *Dest) {
+    return Insert(BranchInst::Create(Dest));
+  }
+
+  /// CreateCondBr - Create a conditional 'br Cond, TrueDest, FalseDest'
+  /// instruction.
+  BranchInst *CreateCondBr(Value *Cond, BasicBlock *True, BasicBlock *False) {
+    return Insert(BranchInst::Create(True, False, Cond));
+  }
+  
+  /// CreateSwitch - Create a switch instruction with the specified value,
+  /// default dest, and with a hint for the number of cases that will be added
+  /// (for efficient allocation).
+  SwitchInst *CreateSwitch(Value *V, BasicBlock *Dest, unsigned NumCases = 10) {
+    return Insert(SwitchInst::Create(V, Dest, NumCases));
+  }
+  
+  /// CreateInvoke - Create an invoke instruction.
+  template<typename InputIterator>
+  InvokeInst *CreateInvoke(Value *Callee, BasicBlock *NormalDest, 
+                           BasicBlock *UnwindDest, InputIterator ArgBegin, 
+                           InputIterator ArgEnd, const char *Name = "") {
+    return Insert(InvokeInst::Create(Callee, NormalDest, UnwindDest,
+                                     ArgBegin, ArgEnd, Name));
+  }
+  
+  UnwindInst *CreateUnwind() {
+    return Insert(new UnwindInst());
+  }
+
+  UnreachableInst *CreateUnreachable() {
+    return Insert(new UnreachableInst());
+  }
+  
+  //===--------------------------------------------------------------------===//
+  // Instruction creation methods: Binary Operators
+  //===--------------------------------------------------------------------===//
+
+  Value *CreateAdd(Value *LHS, Value *RHS, const char *Name = "") {
+    if (Constant *LC = dyn_cast<Constant>(LHS))
+      if (Constant *RC = dyn_cast<Constant>(RHS))
+        return ConstantExpr::getAdd(LC, RC);      
+    return Insert(BinaryOperator::createAdd(LHS, RHS, Name));
+  }
+  Value *CreateSub(Value *LHS, Value *RHS, const char *Name = "") {
+    if (Constant *LC = dyn_cast<Constant>(LHS))
+      if (Constant *RC = dyn_cast<Constant>(RHS))
+        return ConstantExpr::getSub(LC, RC);
+    return Insert(BinaryOperator::createSub(LHS, RHS, Name));
+  }
+  Value *CreateMul(Value *LHS, Value *RHS, const char *Name = "") {
+    if (Constant *LC = dyn_cast<Constant>(LHS))
+      if (Constant *RC = dyn_cast<Constant>(RHS))
+        return ConstantExpr::getMul(LC, RC);
+    return Insert(BinaryOperator::createMul(LHS, RHS, Name));
+  }
+  Value *CreateUDiv(Value *LHS, Value *RHS, const char *Name = "") {
+    if (Constant *LC = dyn_cast<Constant>(LHS))
+      if (Constant *RC = dyn_cast<Constant>(RHS))
+        return ConstantExpr::getUDiv(LC, RC);
+    return Insert(BinaryOperator::createUDiv(LHS, RHS, Name));
+  }
+  Value *CreateSDiv(Value *LHS, Value *RHS, const char *Name = "") {
+    if (Constant *LC = dyn_cast<Constant>(LHS))
+      if (Constant *RC = dyn_cast<Constant>(RHS))
+        return ConstantExpr::getSDiv(LC, RC);      
+    return Insert(BinaryOperator::createSDiv(LHS, RHS, Name));
+  }
+  Value *CreateFDiv(Value *LHS, Value *RHS, const char *Name = "") {
+    if (Constant *LC = dyn_cast<Constant>(LHS))
+      if (Constant *RC = dyn_cast<Constant>(RHS))
+        return ConstantExpr::getFDiv(LC, RC);      
+    return Insert(BinaryOperator::createFDiv(LHS, RHS, Name));
+  }
+  Value *CreateURem(Value *LHS, Value *RHS, const char *Name = "") {
+    if (Constant *LC = dyn_cast<Constant>(LHS))
+      if (Constant *RC = dyn_cast<Constant>(RHS))
+        return ConstantExpr::getURem(LC, RC);
+    return Insert(BinaryOperator::createURem(LHS, RHS, Name));
+  }
+  Value *CreateSRem(Value *LHS, Value *RHS, const char *Name = "") {
+    if (Constant *LC = dyn_cast<Constant>(LHS))
+      if (Constant *RC = dyn_cast<Constant>(RHS))
+        return ConstantExpr::getSRem(LC, RC);
+    return Insert(BinaryOperator::createSRem(LHS, RHS, Name));
+  }
+  Value *CreateFRem(Value *LHS, Value *RHS, const char *Name = "") {
+    if (Constant *LC = dyn_cast<Constant>(LHS))
+      if (Constant *RC = dyn_cast<Constant>(RHS))
+        return ConstantExpr::getFRem(LC, RC);
+    return Insert(BinaryOperator::createFRem(LHS, RHS, Name));
+  }
+  Value *CreateShl(Value *LHS, Value *RHS, const char *Name = "") {
+    if (Constant *LC = dyn_cast<Constant>(LHS))
+      if (Constant *RC = dyn_cast<Constant>(RHS))
+        return ConstantExpr::getShl(LC, RC);
+    return Insert(BinaryOperator::createShl(LHS, RHS, Name));
+  }
+  Value *CreateLShr(Value *LHS, Value *RHS, const char *Name = "") {
+    if (Constant *LC = dyn_cast<Constant>(LHS))
+      if (Constant *RC = dyn_cast<Constant>(RHS))
+        return ConstantExpr::getLShr(LC, RC);
+    return Insert(BinaryOperator::createLShr(LHS, RHS, Name));
+  }
+  Value *CreateAShr(Value *LHS, Value *RHS, const char *Name = "") {
+    if (Constant *LC = dyn_cast<Constant>(LHS))
+      if (Constant *RC = dyn_cast<Constant>(RHS))
+        return ConstantExpr::getAShr(LC, RC);
+    return Insert(BinaryOperator::createAShr(LHS, RHS, Name));
+  }
+  Value *CreateAnd(Value *LHS, Value *RHS, const char *Name = "") {
+    if (Constant *LC = dyn_cast<Constant>(LHS))
+      if (Constant *RC = dyn_cast<Constant>(RHS))
+        return ConstantExpr::getAnd(LC, RC);
+    return Insert(BinaryOperator::createAnd(LHS, RHS, Name));
+  }
+  Value *CreateOr(Value *LHS, Value *RHS, const char *Name = "") {
+    if (Constant *LC = dyn_cast<Constant>(LHS))
+      if (Constant *RC = dyn_cast<Constant>(RHS))
+        return ConstantExpr::getOr(LC, RC);
+    return Insert(BinaryOperator::createOr(LHS, RHS, Name));
+  }
+  Value *CreateXor(Value *LHS, Value *RHS, const char *Name = "") {
+    if (Constant *LC = dyn_cast<Constant>(LHS))
+      if (Constant *RC = dyn_cast<Constant>(RHS))
+        return ConstantExpr::getXor(LC, RC);
+    return Insert(BinaryOperator::createXor(LHS, RHS, Name));
+  }
+
+  BinaryOperator *CreateBinOp(Instruction::BinaryOps Opc,
+                              Value *LHS, Value *RHS, const char *Name = "") {
+    return Insert(BinaryOperator::create(Opc, LHS, RHS, Name));
+  }
+  
+  BinaryOperator *CreateNeg(Value *V, const char *Name = "") {
+    return Insert(BinaryOperator::createNeg(V, Name));
+  }
+  BinaryOperator *CreateNot(Value *V, const char *Name = "") {
+    return Insert(BinaryOperator::createNot(V, Name));
+  }
+  
+  //===--------------------------------------------------------------------===//
+  // Instruction creation methods: Memory Instructions
+  //===--------------------------------------------------------------------===//
+  
+  MallocInst *CreateMalloc(const Type *Ty, Value *ArraySize = 0,
+                           const char *Name = "") {
+    return Insert(new MallocInst(Ty, ArraySize, Name));
+  }
+  AllocaInst *CreateAlloca(const Type *Ty, Value *ArraySize = 0,
+                           const char *Name = "") {
+    return Insert(new AllocaInst(Ty, ArraySize, Name));
+  }
+  FreeInst *CreateFree(Value *Ptr) {
+    return Insert(new FreeInst(Ptr));
+  }
+  LoadInst *CreateLoad(Value *Ptr, const char *Name = 0) {
+    return Insert(new LoadInst(Ptr, Name));
+  }
+  LoadInst *CreateLoad(Value *Ptr, bool isVolatile, const char *Name = 0) {
+    return Insert(new LoadInst(Ptr, Name, isVolatile));
+  }
+  StoreInst *CreateStore(Value *Val, Value *Ptr, bool isVolatile = false) {
+    return Insert(new StoreInst(Val, Ptr, isVolatile));
+  }
+  template<typename InputIterator>
+  Value *CreateGEP(Value *Ptr, InputIterator IdxBegin, 
+                               InputIterator IdxEnd, const char *Name = "") {
+      
+    if (Constant *PC = dyn_cast<Constant>(Ptr)) {
+      // Every index must be constant.
+      InputIterator i;
+      for (i = IdxBegin; i < IdxEnd; ++i) {
+        if (!dyn_cast<Constant>(*i))
+          break;
+      }
+      if (i == IdxEnd)
+        return ConstantExpr::getGetElementPtr(PC, &IdxBegin[0], IdxEnd - IdxBegin);
+    }      
+    return(Insert(GetElementPtrInst::Create(Ptr, IdxBegin, IdxEnd, Name)));
+  }
+  Value *CreateGEP(Value *Ptr, Value *Idx, const char *Name = "") {
+    if (Constant *PC = dyn_cast<Constant>(Ptr))
+      if (Constant *IC = dyn_cast<Constant>(Idx))
+        return ConstantExpr::getGetElementPtr(PC, &IC, 1);
+    return Insert(GetElementPtrInst::Create(Ptr, Idx, Name));
+  }
+  Value *CreateStructGEP(Value *Ptr, unsigned Idx, const char *Name = "") {
+    llvm::Value *Idxs[] = {
+      ConstantInt::get(llvm::Type::Int32Ty, 0),
+      ConstantInt::get(llvm::Type::Int32Ty, Idx)
+    };
+    
+    if (Constant *PC = dyn_cast<Constant>(Ptr))
+      return ConstantExpr::getGetElementPtr(PC, Idxs, 2);
+    
+    return Insert(GetElementPtrInst::Create(Ptr, Idxs, Idxs+2, Name));
+  }
+  
+  //===--------------------------------------------------------------------===//
+  // Instruction creation methods: Cast/Conversion Operators
+  //===--------------------------------------------------------------------===//
+    
+  Value *CreateTrunc(Value *V, const Type *DestTy, const char *Name = "") {
+    return CreateCast(Instruction::Trunc, V, DestTy, Name);
+  }
+  Value *CreateZExt(Value *V, const Type *DestTy, const char *Name = "") {
+    return CreateCast(Instruction::ZExt, V, DestTy, Name);
+  }
+  Value *CreateSExt(Value *V, const Type *DestTy, const char *Name = "") {
+    return CreateCast(Instruction::SExt, V, DestTy, Name);
+  }
+  Value *CreateFPToUI(Value *V, const Type *DestTy, const char *Name = ""){
+    return CreateCast(Instruction::FPToUI, V, DestTy, Name);
+  }
+  Value *CreateFPToSI(Value *V, const Type *DestTy, const char *Name = ""){
+    return CreateCast(Instruction::FPToSI, V, DestTy, Name);
+  }
+  Value *CreateUIToFP(Value *V, const Type *DestTy, const char *Name = ""){
+    return CreateCast(Instruction::UIToFP, V, DestTy, Name);
+  }
+  Value *CreateSIToFP(Value *V, const Type *DestTy, const char *Name = ""){
+    return CreateCast(Instruction::SIToFP, V, DestTy, Name);
+  }
+  Value *CreateFPTrunc(Value *V, const Type *DestTy,
+                       const char *Name = "") {
+    return CreateCast(Instruction::FPTrunc, V, DestTy, Name);
+  }
+  Value *CreateFPExt(Value *V, const Type *DestTy, const char *Name = "") {
+    return CreateCast(Instruction::FPExt, V, DestTy, Name);
+  }
+  Value *CreatePtrToInt(Value *V, const Type *DestTy,
+                        const char *Name = "") {
+    return CreateCast(Instruction::PtrToInt, V, DestTy, Name);
+  }
+  Value *CreateIntToPtr(Value *V, const Type *DestTy,
+                        const char *Name = "") {
+    return CreateCast(Instruction::IntToPtr, V, DestTy, Name);
+  }
+  Value *CreateBitCast(Value *V, const Type *DestTy,
+                       const char *Name = "") {
+    return CreateCast(Instruction::BitCast, V, DestTy, Name);
+  }
+
+  Value *CreateCast(Instruction::CastOps Op, Value *V, const Type *DestTy,
+                     const char *Name = "") {
+    if (V->getType() == DestTy)
+      return V;
+    if (Constant *VC = dyn_cast<Constant>(V))
+      return ConstantExpr::getCast(Op, VC, DestTy);      
+    return Insert(CastInst::create(Op, V, DestTy, Name));
+  }
+  Value *CreateIntCast(Value *V, const Type *DestTy, bool isSigned,
+                        const char *Name = "") {
+    if (V->getType() == DestTy)
+      return V;
+    if (Constant *VC = dyn_cast<Constant>(V))
+      return ConstantExpr::getIntegerCast(VC, DestTy, isSigned);
+    return Insert(CastInst::createIntegerCast(V, DestTy, isSigned, Name));
+  }
+
+  //===--------------------------------------------------------------------===//
+  // Instruction creation methods: Compare Instructions
+  //===--------------------------------------------------------------------===//
+  
+  Value *CreateICmpEQ(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateICmp(ICmpInst::ICMP_EQ, LHS, RHS, Name);
+  }
+  Value *CreateICmpNE(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateICmp(ICmpInst::ICMP_NE, LHS, RHS, Name);
+  }
+  Value *CreateICmpUGT(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateICmp(ICmpInst::ICMP_UGT, LHS, RHS, Name);
+  }
+  Value *CreateICmpUGE(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateICmp(ICmpInst::ICMP_UGE, LHS, RHS, Name);
+  }
+  Value *CreateICmpULT(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateICmp(ICmpInst::ICMP_ULT, LHS, RHS, Name);
+  }
+  Value *CreateICmpULE(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateICmp(ICmpInst::ICMP_ULE, LHS, RHS, Name);
+  }
+  Value *CreateICmpSGT(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateICmp(ICmpInst::ICMP_SGT, LHS, RHS, Name);
+  }
+  Value *CreateICmpSGE(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateICmp(ICmpInst::ICMP_SGE, LHS, RHS, Name);
+  }
+  Value *CreateICmpSLT(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateICmp(ICmpInst::ICMP_SLT, LHS, RHS, Name);
+  }
+  Value *CreateICmpSLE(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateICmp(ICmpInst::ICMP_SLE, LHS, RHS, Name);
+  }
+  
+  Value *CreateFCmpOEQ(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateFCmp(FCmpInst::FCMP_OEQ, LHS, RHS, Name);
+  }
+  Value *CreateFCmpOGT(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateFCmp(FCmpInst::FCMP_OGT, LHS, RHS, Name);
+  }
+  Value *CreateFCmpOGE(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateFCmp(FCmpInst::FCMP_OGE, LHS, RHS, Name);
+  }
+  Value *CreateFCmpOLT(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateFCmp(FCmpInst::FCMP_OLT, LHS, RHS, Name);
+  }
+  Value *CreateFCmpOLE(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateFCmp(FCmpInst::FCMP_OLE, LHS, RHS, Name);
+  }
+  Value *CreateFCmpONE(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateFCmp(FCmpInst::FCMP_ONE, LHS, RHS, Name);
+  }
+  Value *CreateFCmpORD(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateFCmp(FCmpInst::FCMP_ORD, LHS, RHS, Name);
+  }
+  Value *CreateFCmpUNO(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateFCmp(FCmpInst::FCMP_UNO, LHS, RHS, Name);
+  }
+  Value *CreateFCmpUEQ(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateFCmp(FCmpInst::FCMP_UEQ, LHS, RHS, Name);
+  }
+  Value *CreateFCmpUGT(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateFCmp(FCmpInst::FCMP_UGT, LHS, RHS, Name);
+  }
+  Value *CreateFCmpUGE(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateFCmp(FCmpInst::FCMP_UGE, LHS, RHS, Name);
+  }
+  Value *CreateFCmpULT(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateFCmp(FCmpInst::FCMP_ULT, LHS, RHS, Name);
+  }
+  Value *CreateFCmpULE(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateFCmp(FCmpInst::FCMP_ULE, LHS, RHS, Name);
+  }
+  Value *CreateFCmpUNE(Value *LHS, Value *RHS, const char *Name = "") {
+    return CreateFCmp(FCmpInst::FCMP_UNE, LHS, RHS, Name);
+  }
+
+  Value *CreateICmp(ICmpInst::Predicate P, Value *LHS, Value *RHS, 
+                     const char *Name = "") {
+    if (Constant *LC = dyn_cast<Constant>(LHS))
+      if (Constant *RC = dyn_cast<Constant>(RHS))
+        return ConstantExpr::getCompare(P, LC, RC);      
+    return Insert(new ICmpInst(P, LHS, RHS, Name));
+  }
+  Value *CreateFCmp(FCmpInst::Predicate P, Value *LHS, Value *RHS, 
+                     const char *Name = "") {
+    if (Constant *LC = dyn_cast<Constant>(LHS))
+      if (Constant *RC = dyn_cast<Constant>(RHS))
+        return ConstantExpr::getCompare(P, LC, RC);
+    return Insert(new FCmpInst(P, LHS, RHS, Name));
+  }
+
+  //===--------------------------------------------------------------------===//
+  // Instruction creation methods: Other Instructions
+  //===--------------------------------------------------------------------===//
+
+  PHINode *CreatePHI(const Type *Ty, const char *Name = "") {
+    return Insert(PHINode::Create(Ty, Name));
+  }
+
+  CallInst *CreateCall(Value *Callee, const char *Name = "") {
+    return Insert(CallInst::Create(Callee, Name));
+  }
+  CallInst *CreateCall(Value *Callee, Value *Arg, const char *Name = "") {
+    return Insert(CallInst::Create(Callee, Arg, Name));
+  }
+
+  template<typename InputIterator>
+  CallInst *CreateCall(Value *Callee, InputIterator ArgBegin, 
+                     InputIterator ArgEnd, const char *Name = "") {
+    return Insert(CallInst::Create(Callee, ArgBegin, ArgEnd, Name));
+  }
+
+  Value *CreateSelect(Value *C, Value *True, Value *False,
+                         const char *Name = "") {
+    if (Constant *CC = dyn_cast<Constant>(C))
+      if (Constant *TC = dyn_cast<Constant>(True))
+        if (Constant *FC = dyn_cast<Constant>(False))
+          return ConstantExpr::getSelect(CC, TC, FC);      
+    return Insert(SelectInst::Create(C, True, False, Name));
+  }
+
+  VAArgInst *CreateVAArg(Value *List, const Type *Ty, const char *Name = "") {
+    return Insert(new VAArgInst(List, Ty, Name));
+  }
+
+  Value *CreateExtractElement(Value *Vec, Value *Idx,
+                                         const char *Name = "") {
+    if (Constant *VC = dyn_cast<Constant>(Vec))
+      if (Constant *IC = dyn_cast<Constant>(Idx))
+        return ConstantExpr::getExtractElement(VC, IC);
+    return Insert(new ExtractElementInst(Vec, Idx, Name));
+  }
+
+  Value *CreateInsertElement(Value *Vec, Value *NewElt, Value *Idx,
+                             const char *Name = "") {
+    if (Constant *VC = dyn_cast<Constant>(Vec))
+      if (Constant *NC = dyn_cast<Constant>(NewElt))
+        if (Constant *IC = dyn_cast<Constant>(Idx))
+          return ConstantExpr::getInsertElement(VC, NC, IC);
+    return Insert(InsertElementInst::Create(Vec, NewElt, Idx, Name));
+  }
+
+  Value *CreateShuffleVector(Value *V1, Value *V2, Value *Mask,
+                                       const char *Name = "") {
+    if (Constant *V1C = dyn_cast<Constant>(V1))
+      if (Constant *V2C = dyn_cast<Constant>(V2))
+        if (Constant *MC = dyn_cast<Constant>(Mask))
+          return ConstantExpr::getShuffleVector(V1C, V2C, MC);      
+    return Insert(new ShuffleVectorInst(V1, V2, Mask, Name));
+  }
+};
+  
+}
+
+#endif