More LLVMContext-ification.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74807 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Utils/BasicBlockUtils.cpp

@@ -16,6 +16,7 @@
 #include "llvm/Function.h"
 #include "llvm/Instructions.h"
 #include "llvm/IntrinsicInst.h"
+#include "llvm/LLVMContext.h"
 #include "llvm/Constant.h"
 #include "llvm/Type.h"
 #include "llvm/Analysis/AliasAnalysis.h"
@@ -49,7 +50,7 @@ void llvm::DeleteDeadBlock(BasicBlock *BB) {
     // contained within it must dominate their uses, that all uses will
     // eventually be removed (they are themselves dead).
     if (!I.use_empty())
-      I.replaceAllUsesWith(UndefValue::get(I.getType()));
+      I.replaceAllUsesWith(BB->getContext()->getUndef(I.getType()));
     BB->getInstList().pop_back();
   }
   
@@ -69,7 +70,7 @@ void llvm::FoldSingleEntryPHINodes(BasicBlock *BB) {
     if (PN->getIncomingValue(0) != PN)
       PN->replaceAllUsesWith(PN->getIncomingValue(0));
     else
-      PN->replaceAllUsesWith(UndefValue::get(PN->getType()));
+      PN->replaceAllUsesWith(BB->getContext()->getUndef(PN->getType()));
     PN->eraseFromParent();
   }
 }
@@ -250,7 +251,8 @@ void llvm::RemoveSuccessor(TerminatorInst *TI, unsigned SuccNum) {
 
       // Create a value to return... if the function doesn't return null...
       if (BB->getParent()->getReturnType() != Type::VoidTy)
-        RetVal = Constant::getNullValue(BB->getParent()->getReturnType());
+        RetVal = TI->getParent()->getContext()->getNullValue(
+                   BB->getParent()->getReturnType());
 
       // Create the return...
       NewTI = ReturnInst::Create(RetVal);
@@ -385,7 +387,8 @@ BasicBlock *llvm::SplitBlockPredecessors(BasicBlock *BB,
   if (NumPreds == 0) {
     // Insert dummy values as the incoming value.
     for (BasicBlock::iterator I = BB->begin(); isa<PHINode>(I); ++I)
-      cast<PHINode>(I)->addIncoming(UndefValue::get(I->getType()), NewBB);
+      cast<PHINode>(I)->addIncoming(BB->getContext()->getUndef(I->getType()), 
+                                    NewBB);
     return NewBB;
   }