Apply the VISIBILITY_HIDDEN field to the remaining anonymous classes in
the Transforms library. This reduces debug library size by 132 KB, debug
binary size by 376 KB, and reduces link time for llvm tools slightly.

llvm-svn: 33939
diff --git a/llvm/lib/Transforms/IPO/ExtractFunction.cpp b/llvm/lib/Transforms/IPO/ExtractFunction.cpp
index f877184..ae1eb22 100644
--- a/llvm/lib/Transforms/IPO/ExtractFunction.cpp
+++ b/llvm/lib/Transforms/IPO/ExtractFunction.cpp
@@ -15,10 +15,12 @@
 #include "llvm/Module.h"
 #include "llvm/Pass.h"
 #include "llvm/Transforms/IPO.h"
+#include "llvm/Support/Compiler.h"
 using namespace llvm;
 
 namespace {
-  class FunctionExtractorPass : public ModulePass {
+  /// @brief A pass to extract specific functions and their dependencies.
+  class VISIBILITY_HIDDEN FunctionExtractorPass : public ModulePass {
     Function *Named;
     bool deleteFunc;
     bool reLink;