Standardize on 'class' instead of 'struct'. Gets rid of warnings in VC++

Patch contributed by Jeff Cohen.

llvm-svn: 17889

llvm/include/llvm/Support/InstVisitor.h

@@ -70,12 +70,13 @@ class AllocationInst;
 
 
 template<typename SubClass, typename RetTy=void>
-struct InstVisitor {
+class InstVisitor {
   //===--------------------------------------------------------------------===//
   // Interface code - This is the public interface of the InstVisitor that you
   // use to visit instructions...
   //
 
+public:
   // Generic visit method - Allow visitation to all instructions in a range
   template<class Iterator>
   void visit(Iterator Start, Iterator End) {

llvm/lib/Analysis/InstCount.cpp

@@ -29,7 +29,7 @@ namespace {
 #include "llvm/Instruction.def"
 
   class InstCount : public FunctionPass, public InstVisitor<InstCount> {
-    friend struct InstVisitor<InstCount>;
+    friend class InstVisitor<InstCount>;
 
     void visitFunction  (Function &F) { ++TotalFuncs; }
     void visitBasicBlock(BasicBlock &BB) { ++TotalBlocks; }