diff --git a/lib/Analysis/BasicAliasAnalysis.cpp b/lib/Analysis/BasicAliasAnalysis.cpp
index fa4a029..57eda0f 100644
--- a/lib/Analysis/BasicAliasAnalysis.cpp
+++ b/lib/Analysis/BasicAliasAnalysis.cpp
@@ -23,6 +23,7 @@
 #include "llvm/Pass.h"
 #include "llvm/Target/TargetData.h"
 #include "llvm/Support/GetElementPtrTypeIterator.h"
+#include "llvm/Support/Visibility.h"
 #include <algorithm>
 using namespace llvm;
 
@@ -32,7 +33,7 @@
   /// implementations, in that it does not chain to a previous analysis.  As
   /// such it doesn't follow many of the rules that other alias analyses must.
   ///
-  struct NoAA : public ImmutablePass, public AliasAnalysis {
+  struct VISIBILITY_HIDDEN NoAA : public ImmutablePass, public AliasAnalysis {
     virtual void getAnalysisUsage(AnalysisUsage &AU) const {
       AU.addRequired<TargetData>();
     }
@@ -84,7 +85,7 @@
   /// BasicAliasAnalysis - This is the default alias analysis implementation.
   /// Because it doesn't chain to a previous alias analysis (like -no-aa), it
   /// derives from the NoAA class.
-  struct BasicAliasAnalysis : public NoAA {
+  struct VISIBILITY_HIDDEN BasicAliasAnalysis : public NoAA {
     AliasResult alias(const Value *V1, unsigned V1Size,
                       const Value *V2, unsigned V2Size);
 
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index c6e32c5..a83d2ee 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -69,9 +69,10 @@
 #include "llvm/Assembly/Writer.h"
 #include "llvm/Transforms/Scalar.h"
 #include "llvm/Support/CFG.h"
+#include "llvm/Support/CommandLine.h"
 #include "llvm/Support/ConstantRange.h"
 #include "llvm/Support/InstIterator.h"
-#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Visibility.h"
 #include "llvm/ADT/Statistic.h"
 #include <cmath>
 #include <iostream>
@@ -393,7 +394,7 @@
   /// SCEVComplexityCompare - Return true if the complexity of the LHS is less
   /// than the complexity of the RHS.  This comparator is used to canonicalize
   /// expressions.
-  struct SCEVComplexityCompare {
+  struct VISIBILITY_HIDDEN SCEVComplexityCompare {
     bool operator()(SCEV *LHS, SCEV *RHS) {
       return LHS->getSCEVType() < RHS->getSCEVType();
     }
@@ -1062,7 +1063,7 @@
 /// evolution code.
 ///
 namespace {
-  struct ScalarEvolutionsImpl {
+  struct VISIBILITY_HIDDEN ScalarEvolutionsImpl {
     /// F - The function we are analyzing.
     ///
     Function &F;
diff --git a/lib/CodeGen/PHIElimination.cpp b/lib/CodeGen/PHIElimination.cpp
index 58ab82e..5b8798f 100644
--- a/lib/CodeGen/PHIElimination.cpp
+++ b/lib/CodeGen/PHIElimination.cpp
@@ -23,6 +23,7 @@
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/Statistic.h"
+#include "llvm/Support/Visibility.h"
 #include <set>
 #include <algorithm>
 using namespace llvm;
@@ -31,7 +32,7 @@
   Statistic<> NumAtomic("phielim", "Number of atomic phis lowered");
   Statistic<> NumSimple("phielim", "Number of simple phis lowered");
   
-  struct PNE : public MachineFunctionPass {
+  struct VISIBILITY_HIDDEN PNE : public MachineFunctionPass {
     bool runOnMachineFunction(MachineFunction &Fn) {
       bool Changed = false;
 
diff --git a/lib/CodeGen/RegAllocLocal.cpp b/lib/CodeGen/RegAllocLocal.cpp
index 55d4129..891ee3c 100644
--- a/lib/CodeGen/RegAllocLocal.cpp
+++ b/lib/CodeGen/RegAllocLocal.cpp
@@ -23,6 +23,7 @@
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Debug.h"
+#include "llvm/Support/Visibility.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/Statistic.h"
 #include <algorithm>
@@ -34,7 +35,7 @@
   Statistic<> NumLoads ("ra-local", "Number of loads added");
   Statistic<> NumFolded("ra-local", "Number of loads/stores folded into "
                         "instructions");
-  class RA : public MachineFunctionPass {
+  class VISIBILITY_HIDDEN RA : public MachineFunctionPass {
     const TargetMachine *TM;
     MachineFunction *MF;
     const MRegisterInfo *RegInfo;
diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
index 0ef246b..b6c2d35 100644
--- a/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
+++ b/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
@@ -430,7 +430,8 @@
 
 namespace {
   template<class SF>
-  class RegReductionPriorityQueue : public SchedulingPriorityQueue {
+  class VISIBILITY_HIDDEN RegReductionPriorityQueue
+   : public SchedulingPriorityQueue {
     std::priority_queue<SUnit*, std::vector<SUnit*>, SF> Queue;
 
   public:
@@ -463,7 +464,8 @@
   };
 
   template<class SF>
-  class BURegReductionPriorityQueue : public RegReductionPriorityQueue<SF> {
+  class VISIBILITY_HIDDEN BURegReductionPriorityQueue
+   : public RegReductionPriorityQueue<SF> {
     // SUnits - The SUnits for the current graph.
     const std::vector<SUnit> *SUnits;
     
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index c7e4315..3968c38 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -42,6 +42,7 @@
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/Debug.h"
+#include "llvm/Support/Visibility.h"
 #include <map>
 #include <set>
 #include <iostream>
@@ -101,7 +102,7 @@
   /// particular value is assigned and the type information about the value.
   /// This is needed because values can be promoted into larger registers and
   /// expanded into multiple smaller registers than the value.
-  struct RegsForValue {
+  struct VISIBILITY_HIDDEN RegsForValue {
     /// Regs - This list hold the register (for legal and promoted values)
     /// or register set (for expanded values) that the value should be assigned
     /// to.
diff --git a/lib/CodeGen/UnreachableBlockElim.cpp b/lib/CodeGen/UnreachableBlockElim.cpp
index 1d4e530..e4fc9f8 100644
--- a/lib/CodeGen/UnreachableBlockElim.cpp
+++ b/lib/CodeGen/UnreachableBlockElim.cpp
@@ -27,11 +27,12 @@
 #include "llvm/Pass.h"
 #include "llvm/Type.h"
 #include "llvm/Support/CFG.h"
+#include "llvm/Support/Visibility.h"
 #include "llvm/ADT/DepthFirstIterator.h"
 using namespace llvm;
 
 namespace {
-  class UnreachableBlockElim : public FunctionPass {
+  class VISIBILITY_HIDDEN UnreachableBlockElim : public FunctionPass {
     virtual bool runOnFunction(Function &F);
   };
   RegisterOpt<UnreachableBlockElim>
diff --git a/lib/Target/PowerPC/PPCAsmPrinter.cpp b/lib/Target/PowerPC/PPCAsmPrinter.cpp
index 2a0104d..bb00843 100644
--- a/lib/Target/PowerPC/PPCAsmPrinter.cpp
+++ b/lib/Target/PowerPC/PPCAsmPrinter.cpp
@@ -241,7 +241,7 @@
 
   /// DarwinDwarfWriter - Dwarf debug info writer customized for Darwin/Mac OS X
   ///
-  struct DarwinDwarfWriter : public DwarfWriter {
+  struct VISIBILITY_HIDDEN DarwinDwarfWriter : public DwarfWriter {
     // Ctor.
     DarwinDwarfWriter(std::ostream &o, AsmPrinter *ap)
     : DwarfWriter(o, ap)
@@ -265,7 +265,7 @@
 
   /// DarwinAsmPrinter - PowerPC assembly printer, customized for Darwin/Mac OS
   /// X
-  struct DarwinAsmPrinter : public PPCAsmPrinter {
+  struct VISIBILITY_HIDDEN DarwinAsmPrinter : public PPCAsmPrinter {
   
     DarwinDwarfWriter DW;
 
@@ -309,7 +309,7 @@
 
   /// AIXAsmPrinter - PowerPC assembly printer, customized for AIX
   ///
-  struct AIXAsmPrinter : public PPCAsmPrinter {
+  struct VISIBILITY_HIDDEN AIXAsmPrinter : public PPCAsmPrinter {
     /// Map for labels corresponding to global variables
     ///
     std::map<const GlobalVariable*,std::string> GVToLabelMap;
diff --git a/lib/Target/PowerPC/PPCBranchSelector.cpp b/lib/Target/PowerPC/PPCBranchSelector.cpp
index 36f6805..b3d100c 100644
--- a/lib/Target/PowerPC/PPCBranchSelector.cpp
+++ b/lib/Target/PowerPC/PPCBranchSelector.cpp
@@ -19,11 +19,12 @@
 #include "PPCInstrBuilder.h"
 #include "PPCInstrInfo.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/Support/Visibility.h"
 #include <map>
 using namespace llvm;
 
 namespace {
-  struct PPCBSel : public MachineFunctionPass {
+  struct VISIBILITY_HIDDEN PPCBSel : public MachineFunctionPass {
     // OffsetMap - Mapping between BB and byte offset from start of function
     std::map<MachineBasicBlock*, unsigned> OffsetMap;
 
diff --git a/lib/Target/PowerPC/PPCCodeEmitter.cpp b/lib/Target/PowerPC/PPCCodeEmitter.cpp
index f1c0e07..bc07722 100644
--- a/lib/Target/PowerPC/PPCCodeEmitter.cpp
+++ b/lib/Target/PowerPC/PPCCodeEmitter.cpp
@@ -22,12 +22,13 @@
 #include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/Support/Debug.h"
+#include "llvm/Support/Visibility.h"
 #include "llvm/Target/TargetOptions.h"
 #include <iostream>
 using namespace llvm;
 
 namespace {
-  class PPCCodeEmitter : public MachineFunctionPass {
+  class VISIBILITY_HIDDEN PPCCodeEmitter : public MachineFunctionPass {
     TargetMachine &TM;
     MachineCodeEmitter &MCE;
 
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index 6e4460b..ec15b64 100644
--- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -31,6 +31,7 @@
 #include "llvm/Target/TargetData.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/Support/Debug.h"
+#include "llvm/Support/Visibility.h"
 #include "llvm/Target/TargetLowering.h"
 #include <algorithm>
 #include <iostream>
@@ -104,7 +105,7 @@
     }
   };
 
-  class LoopStrengthReduce : public FunctionPass {
+  class VISIBILITY_HIDDEN LoopStrengthReduce : public FunctionPass {
     LoopInfo *LI;
     ETForest *EF;
     ScalarEvolution *SE;
diff --git a/lib/Transforms/Scalar/ScalarReplAggregates.cpp b/lib/Transforms/Scalar/ScalarReplAggregates.cpp
index f5bab8d..843c908 100644
--- a/lib/Transforms/Scalar/ScalarReplAggregates.cpp
+++ b/lib/Transforms/Scalar/ScalarReplAggregates.cpp
@@ -28,9 +28,10 @@
 #include "llvm/Analysis/Dominators.h"
 #include "llvm/Target/TargetData.h"
 #include "llvm/Transforms/Utils/PromoteMemToReg.h"
+#include "llvm/Support/Debug.h"
 #include "llvm/Support/GetElementPtrTypeIterator.h"
 #include "llvm/Support/MathExtras.h"
-#include "llvm/Support/Debug.h"
+#include "llvm/Support/Visibility.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/ADT/StringExtras.h"
 #include <iostream>
@@ -42,7 +43,7 @@
   Statistic<> NumConverted("scalarrepl",
                            "Number of aggregates converted to scalar");
 
-  struct SROA : public FunctionPass {
+  struct VISIBILITY_HIDDEN SROA : public FunctionPass {
     bool runOnFunction(Function &F);
 
     bool performScalarRepl(Function &F);
diff --git a/lib/Transforms/Utils/BreakCriticalEdges.cpp b/lib/Transforms/Utils/BreakCriticalEdges.cpp
index 5bb7d46..7b00de6 100644
--- a/lib/Transforms/Utils/BreakCriticalEdges.cpp
+++ b/lib/Transforms/Utils/BreakCriticalEdges.cpp
@@ -24,13 +24,14 @@
 #include "llvm/Instructions.h"
 #include "llvm/Type.h"
 #include "llvm/Support/CFG.h"
+#include "llvm/Support/Visibility.h"
 #include "llvm/ADT/Statistic.h"
 using namespace llvm;
 
 namespace {
   Statistic<> NumBroken("break-crit-edges", "Number of blocks inserted");
 
-  struct BreakCriticalEdges : public FunctionPass {
+  struct VISIBILITY_HIDDEN BreakCriticalEdges : public FunctionPass {
     virtual bool runOnFunction(Function &F);
 
     virtual void getAnalysisUsage(AnalysisUsage &AU) const {
diff --git a/lib/Transforms/Utils/LoopSimplify.cpp b/lib/Transforms/Utils/LoopSimplify.cpp
index 3188f12..dcad43f 100644
--- a/lib/Transforms/Utils/LoopSimplify.cpp
+++ b/lib/Transforms/Utils/LoopSimplify.cpp
@@ -41,6 +41,7 @@
 #include "llvm/Analysis/Dominators.h"
 #include "llvm/Analysis/LoopInfo.h"
 #include "llvm/Support/CFG.h"
+#include "llvm/Support/Visibility.h"
 #include "llvm/ADT/SetOperations.h"
 #include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/Statistic.h"
@@ -53,7 +54,7 @@
   Statistic<>
   NumNested("loopsimplify", "Number of nested loops split out");
 
-  struct LoopSimplify : public FunctionPass {
+  struct VISIBILITY_HIDDEN LoopSimplify : public FunctionPass {
     // AA - If we have an alias analysis object to update, this is it, otherwise
     // this is null.
     AliasAnalysis *AA;
diff --git a/lib/Transforms/Utils/LowerAllocations.cpp b/lib/Transforms/Utils/LowerAllocations.cpp
index dab8084..eab6468 100644
--- a/lib/Transforms/Utils/LowerAllocations.cpp
+++ b/lib/Transforms/Utils/LowerAllocations.cpp
@@ -21,6 +21,7 @@
 #include "llvm/Pass.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/Target/TargetData.h"
+#include "llvm/Support/Visibility.h"
 using namespace llvm;
 
 namespace {
@@ -29,7 +30,7 @@
   /// LowerAllocations - Turn malloc and free instructions into %malloc and
   /// %free calls.
   ///
-  class LowerAllocations : public BasicBlockPass {
+  class VISIBILITY_HIDDEN LowerAllocations : public BasicBlockPass {
     Function *MallocFunc;   // Functions in the module we are processing
     Function *FreeFunc;     // Initialized by doInitialization
     bool LowerMallocArgToInteger;
diff --git a/lib/Transforms/Utils/PromoteMemoryToRegister.cpp b/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
index e433e6d..f748770 100644
--- a/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
+++ b/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
@@ -26,6 +26,7 @@
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/Support/CFG.h"
 #include "llvm/Support/StableBasicBlockNumbering.h"
+#include "llvm/Support/Visibility.h"
 #include <algorithm>
 using namespace llvm;
 
@@ -52,7 +53,7 @@
 }
 
 namespace {
-  struct PromoteMem2Reg {
+  struct VISIBILITY_HIDDEN PromoteMem2Reg {
     /// Allocas - The alloca instructions being promoted.
     ///
     std::vector<AllocaInst*> Allocas;