Remove VISIBILITY_HIDDEN from class/struct found inside anonymous namespaces.
Chris claims we should never have visibility_hidden inside any .cpp file but
that's still not true even after this commit.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85042 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineSink.cpp b/lib/CodeGen/MachineSink.cpp
index a00bebb..70d471f 100644
--- a/lib/CodeGen/MachineSink.cpp
+++ b/lib/CodeGen/MachineSink.cpp
@@ -33,7 +33,7 @@
 STATISTIC(NumSunk, "Number of machine instructions sunk");
 
 namespace {
-  class VISIBILITY_HIDDEN MachineSinking : public MachineFunctionPass {
+  class MachineSinking : public MachineFunctionPass {
     const TargetInstrInfo *TII;
     const TargetRegisterInfo *TRI;
     MachineRegisterInfo  *RegInfo; // Machine register information