Clean up code due to auto-insert constructors

llvm-svn: 3665
diff --git a/llvm/lib/Transforms/Scalar/ADCE.cpp b/llvm/lib/Transforms/Scalar/ADCE.cpp
index 15b71fd..3aca4a2 100644
--- a/llvm/lib/Transforms/Scalar/ADCE.cpp
+++ b/llvm/lib/Transforms/Scalar/ADCE.cpp
@@ -240,7 +240,7 @@
     //
     if (!AliveBlocks.count(&Func->front())) {
       BasicBlock *NewEntry = new BasicBlock();
-      NewEntry->getInstList().push_back(new BranchInst(&Func->front()));
+      new BranchInst(&Func->front(), NewEntry->end());
       Func->getBasicBlockList().push_front(NewEntry);
       AliveBlocks.insert(NewEntry);    // This block is always alive!
     }
@@ -353,9 +353,8 @@
         // Delete the old terminator instruction...
         BB->getInstList().pop_back();
         const Type *RetTy = Func->getReturnType();
-        Instruction *New = new ReturnInst(RetTy != Type::VoidTy ?
-                                          Constant::getNullValue(RetTy) : 0);
-        BB->getInstList().push_back(New);
+        new ReturnInst(RetTy != Type::VoidTy ? Constant::getNullValue(RetTy) :0,
+                       BB->end());
       }
 
       BB->dropAllReferences();
diff --git a/llvm/lib/Transforms/Scalar/LICM.cpp b/llvm/lib/Transforms/Scalar/LICM.cpp
index 37333db..7bae9fd 100644
--- a/llvm/lib/Transforms/Scalar/LICM.cpp
+++ b/llvm/lib/Transforms/Scalar/LICM.cpp
@@ -241,10 +241,8 @@
     // No loop pre-header, insert a PHI node into header to capture all of the
     // incoming versions of the value.
     //
-    PHINode *LoopVal = new PHINode(Inst.getType(), InstName+".phi");
-
-    // Insert the new PHI node into the loop header...
-    Header->getInstList().push_front(LoopVal);
+    PHINode *LoopVal = new PHINode(Inst.getType(), InstName+".phi",
+                                   Header->begin());
 
     // Insert cloned versions of the instruction into all of the loop preds.
     for (unsigned i = 0, e = LoopPreds.size(); i != e; ++i) {
diff --git a/llvm/lib/Transforms/Scalar/LowerAllocations.cpp b/llvm/lib/Transforms/Scalar/LowerAllocations.cpp
index bdb4f9c..001028e 100644
--- a/llvm/lib/Transforms/Scalar/LowerAllocations.cpp
+++ b/llvm/lib/Transforms/Scalar/LowerAllocations.cpp
@@ -87,8 +87,6 @@
   // Loop over all of the instructions, looking for malloc or free instructions
   for (BasicBlock::iterator I = BB.begin(), E = BB.end(); I != E; ++I) {
     if (MallocInst *MI = dyn_cast<MallocInst>(&*I)) {
-      BBIL.remove(I);   // remove the malloc instr...
-
       const Type *AllocTy = MI->getType()->getElementType();
       
       // Get the number of bytes to be allocated for one element of the
@@ -101,39 +99,32 @@
         MallocArg = MI->getOperand(0);         // Operand * 1 = Operand
       } else if (MI->getNumOperands()) {
         // Multiply it by the array size if neccesary...
-        MallocArg = BinaryOperator::create(Instruction::Mul,MI->getOperand(0),
-                                           MallocArg);
-        I = ++BBIL.insert(I, cast<Instruction>(MallocArg));
+        MallocArg = BinaryOperator::create(Instruction::Mul, MI->getOperand(0),
+                                           MallocArg, "", I);
       }
       
       // Create the call to Malloc...
       CallInst *MCall = new CallInst(MallocFunc,
-                                     vector<Value*>(1, MallocArg));
-      I = BBIL.insert(I, MCall);
+                                     vector<Value*>(1, MallocArg), "", I);
       
       // Create a cast instruction to convert to the right type...
-      CastInst *MCast = new CastInst(MCall, MI->getType());
-      I = BBIL.insert(++I, MCast);
+      CastInst *MCast = new CastInst(MCall, MI->getType(), "", I);
       
       // Replace all uses of the old malloc inst with the cast inst
       MI->replaceAllUsesWith(MCast);
-      delete MI;                          // Delete the malloc inst
+      I = --BBIL.erase(I);         // remove and delete the malloc instr...
       Changed = true;
       ++NumLowered;
     } else if (FreeInst *FI = dyn_cast<FreeInst>(&*I)) {
-      BBIL.remove(I);
-      
       // Cast the argument to free into a ubyte*...
       CastInst *MCast = new CastInst(FI->getOperand(0), 
-                                     PointerType::get(Type::UByteTy));
-      I = ++BBIL.insert(I, MCast);
+                                     PointerType::get(Type::UByteTy), "", I);
       
       // Insert a call to the free function...
-      CallInst *FCall = new CallInst(FreeFunc, vector<Value*>(1, MCast));
-      I = BBIL.insert(I, FCall);
+      CallInst *FCall = new CallInst(FreeFunc, vector<Value*>(1, MCast), "", I);
       
       // Delete the old free instruction
-      delete FI;
+      I = --BBIL.erase(I);
       Changed = true;
       ++NumLowered;
     }
diff --git a/llvm/lib/Transforms/Scalar/PiNodeInsertion.cpp b/llvm/lib/Transforms/Scalar/PiNodeInsertion.cpp
index bf0119f..940b56f 100644
--- a/llvm/lib/Transforms/Scalar/PiNodeInsertion.cpp
+++ b/llvm/lib/Transforms/Scalar/PiNodeInsertion.cpp
@@ -148,13 +148,8 @@
     
   // Create the Pi node...
   Value *Pi = Rep;
-  if (Rep == 0) {
-    PHINode *Phi = new PHINode(V->getType(), V->getName() + ".pi");
-    
-    // Insert the Pi node in the successor basic block...
-    Succ->getInstList().push_front(Phi);
-    Pi = Phi;
-  }
+  if (Rep == 0)      // Insert the Pi node in the successor basic block...
+    Pi = new PHINode(V->getType(), V->getName() + ".pi", Succ->begin());
     
   // Loop over all of the uses of V, replacing ones that the Pi node
   // dominates with references to the Pi node itself.