Use SmallVectorImpl::iterator/const_iterator instead of SmallVector to avoid specifying the vector size.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185606 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Utils/BasicBlockUtils.cpp b/lib/Transforms/Utils/BasicBlockUtils.cpp
index ba99d2e..9167795 100644
--- a/lib/Transforms/Utils/BasicBlockUtils.cpp
+++ b/lib/Transforms/Utils/BasicBlockUtils.cpp
@@ -170,7 +170,7 @@
       if (DomTreeNode *DTN = DT->getNode(BB)) {
         DomTreeNode *PredDTN = DT->getNode(PredBB);
         SmallVector<DomTreeNode*, 8> Children(DTN->begin(), DTN->end());
-        for (SmallVector<DomTreeNode*, 8>::iterator DI = Children.begin(),
+        for (SmallVectorImpl<DomTreeNode *>::iterator DI = Children.begin(),
              DE = Children.end(); DI != DE; ++DI)
           DT->changeImmediateDominator(*DI, PredDTN);
 
diff --git a/lib/Transforms/Utils/CodeExtractor.cpp b/lib/Transforms/Utils/CodeExtractor.cpp
index f7c659f..82013f9 100644
--- a/lib/Transforms/Utils/CodeExtractor.cpp
+++ b/lib/Transforms/Utils/CodeExtractor.cpp
@@ -277,8 +277,8 @@
 
         DomTreeNode *NewNode = DT->addNewBlock(New, *I);
 
-        for (SmallVector<DomTreeNode*, 8>::iterator I = Children.begin(),
-               E = Children.end(); I != E; ++I) 
+        for (SmallVectorImpl<DomTreeNode *>::iterator I = Children.begin(),
+               E = Children.end(); I != E; ++I)
           DT->changeImmediateDominator(*I, NewNode);
       }
     }
diff --git a/lib/Transforms/Utils/Local.cpp b/lib/Transforms/Utils/Local.cpp
index f8f00cd..e470e14 100644
--- a/lib/Transforms/Utils/Local.cpp
+++ b/lib/Transforms/Utils/Local.cpp
@@ -925,7 +925,7 @@
   if (Dbgs.empty())
     return false;
 
-  for (SmallVector<DbgDeclareInst *, 4>::iterator I = Dbgs.begin(),
+  for (SmallVectorImpl<DbgDeclareInst *>::iterator I = Dbgs.begin(),
          E = Dbgs.end(); I != E; ++I) {
     DbgDeclareInst *DDI = *I;
     if (AllocaInst *AI = dyn_cast_or_null<AllocaInst>(DDI->getAddress())) {
diff --git a/lib/Transforms/Utils/PromoteMemoryToRegister.cpp b/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
index de335ec..b993092 100644
--- a/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
+++ b/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
@@ -647,7 +647,7 @@
     // them from the Preds list.
     for (unsigned i = 0, e = SomePHI->getNumIncomingValues(); i != e; ++i) {
       // Do a log(n) search of the Preds list for the entry we want.
-      SmallVector<BasicBlock*, 16>::iterator EntIt =
+      SmallVectorImpl<BasicBlock *>::iterator EntIt =
         std::lower_bound(Preds.begin(), Preds.end(),
                          SomePHI->getIncomingBlock(i));
       assert(EntIt != Preds.end() && *EntIt == SomePHI->getIncomingBlock(i)&&