Fix few g++ 8 warning with non obvious copy object operations

Reviewers: dblaikie, dexonsmith	

Reviewed By: dblaikie

Differential Revision: https://reviews.llvm.org/D50296


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@339367 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/ADT/DenseMap.h

@@ -393,7 +393,7 @@ class DenseMapBase : public DebugEpochBase {
     setNumTombstones(other.getNumTombstones());
 
     if (isPodLike<KeyT>::value && isPodLike<ValueT>::value)
-      memcpy(getBuckets(), other.getBuckets(),
+      memcpy(reinterpret_cast<void *>(getBuckets()), other.getBuckets(),
              getNumBuckets() * sizeof(BucketT));
     else
       for (size_t i = 0; i < getNumBuckets(); ++i) {

include/llvm/ADT/SmallVector.h

@@ -299,7 +299,7 @@ class SmallVectorTemplateBase<T, true> : public SmallVectorTemplateCommon<T> {
     // use memcpy here. Note that I and E are iterators and thus might be
     // invalid for memcpy if they are equal.
     if (I != E)
-      memcpy(Dest, I, (E - I) * sizeof(T));
+      memcpy(reinterpret_cast<void *>(Dest), I, (E - I) * sizeof(T));
   }
 
   /// Double the size of the allocated memory, guaranteeing space for at
@@ -310,7 +310,7 @@ class SmallVectorTemplateBase<T, true> : public SmallVectorTemplateCommon<T> {
   void push_back(const T &Elt) {
     if (LLVM_UNLIKELY(this->size() >= this->capacity()))
       this->grow();
-    memcpy(this->end(), &Elt, sizeof(T));
+    memcpy(reinterpret_cast<void *>(this->end()), &Elt, sizeof(T));
     this->set_size(this->size() + 1);
   }