Revert "Give internal classes hidden visibility."

It works with clang, but GCC has different rules so we can't make all of those
hidden. This reverts commit r190534.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190536 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/ObjCARC/ARCRuntimeEntryPoints.h

@@ -29,7 +29,7 @@ namespace objcarc {
 
 /// Declarations for ObjC runtime functions and constants. These are initialized
 /// lazily to avoid cluttering up the Module with unused declarations.
-class LLVM_LIBRARY_VISIBILITY ARCRuntimeEntryPoints {
+class ARCRuntimeEntryPoints {
 public:
   enum EntryPointType {
     EPT_AutoreleaseRV,

lib/Transforms/ObjCARC/ObjCARCAliasAnalysis.h

@@ -35,8 +35,8 @@ namespace objcarc {
   /// TODO: This class could be generalized to know about other ObjC-specific
   /// tricks. Such as knowing that ivars in the non-fragile ABI are non-aliasing
   /// even though their offsets are dynamic.
-  class LLVM_LIBRARY_VISIBILITY ObjCARCAliasAnalysis : public ImmutablePass,
-                                                       public AliasAnalysis {
+  class ObjCARCAliasAnalysis : public ImmutablePass,
+                               public AliasAnalysis {
   public:
     static char ID; // Class identification, replacement for typeinfo
     ObjCARCAliasAnalysis() : ImmutablePass(ID) {

lib/Transforms/ObjCARC/ProvenanceAnalysis.h

@@ -46,7 +46,7 @@ namespace objcarc {
 /// an ``independent provenance source'' of a pointer to determine whether or
 /// not two pointers have the same provenance source and thus could
 /// potentially be related.
-class LLVM_LIBRARY_VISIBILITY ProvenanceAnalysis {
+class ProvenanceAnalysis {
   AliasAnalysis *AA;
 
   typedef std::pair<const Value *, const Value *> ValuePairTy;