[clang][Interp][NFC] Add std:: qualifiers to all malloc/free calls

clang/lib/AST/Interp/InterpBlock.cpp

@@ -83,5 +83,5 @@ void DeadBlock::free() {
     Next->Prev = Prev;
   if (Root == this)
     Root = Next;
-  ::free(this);
+  std::free(this);
 }

clang/lib/AST/Interp/InterpStack.cpp

@@ -19,9 +19,9 @@ InterpStack::~InterpStack() {
 
 void InterpStack::clear() {
   if (Chunk && Chunk->Next)
-    free(Chunk->Next);
+    std::free(Chunk->Next);
   if (Chunk)
-    free(Chunk);
+    std::free(Chunk);
   Chunk = nullptr;
   StackSize = 0;
 }
@@ -33,7 +33,7 @@ void *InterpStack::grow(size_t Size) {
     if (Chunk && Chunk->Next) {
       Chunk = Chunk->Next;
     } else {
-      StackChunk *Next = new (malloc(ChunkSize)) StackChunk(Chunk);
+      StackChunk *Next = new (std::malloc(ChunkSize)) StackChunk(Chunk);
       if (Chunk)
         Chunk->Next = Next;
       Chunk = Next;
@@ -65,7 +65,7 @@ void InterpStack::shrink(size_t Size) {
   while (Size > Chunk->size()) {
     Size -= Chunk->size();
     if (Chunk->Next) {
-      free(Chunk->Next);
+      std::free(Chunk->Next);
       Chunk->Next = nullptr;
     }
     Chunk->End = Chunk->start();

clang/lib/AST/Interp/InterpState.cpp

@@ -28,7 +28,7 @@ InterpState::~InterpState() {
 
   while (DeadBlocks) {
     DeadBlock *Next = DeadBlocks->Next;
-    free(DeadBlocks);
+    std::free(DeadBlocks);
     DeadBlocks = Next;
   }
 }
@@ -54,7 +54,8 @@ void InterpState::deallocate(Block *B) {
     size_t Size = B->getSize();
 
     // Allocate a new block, transferring over pointers.
-    char *Memory = reinterpret_cast<char *>(malloc(sizeof(DeadBlock) + Size));
+    char *Memory =
+        reinterpret_cast<char *>(std::malloc(sizeof(DeadBlock) + Size));
     auto *D = new (Memory) DeadBlock(DeadBlocks, B);
 
     // Move data from one block to another.