WIP: Rewrite explicit instantiations for MachineDominators and DominanceFrontier

lib/Analysis/DominanceFrontier.cpp

 //===- DominanceFrontier.cpp - Dominance Frontier Calculation -------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Analysis/DominanceFrontier.h"
 #include "llvm/Analysis/DominanceFrontierImpl.h"
 #include "llvm/IR/PassManager.h"
 
 using namespace llvm;
 
-namespace llvm {
-template class DominanceFrontierBase<BasicBlock, false>;
-template class DominanceFrontierBase<BasicBlock, true>;
-template class ForwardDominanceFrontierBase<BasicBlock>;
-}
+template class llvm::DominanceFrontierBase<BasicBlock, false>;
+template class llvm::DominanceFrontierBase<BasicBlock, true>;
+template class llvm::ForwardDominanceFrontierBase<BasicBlock>;
 
 char DominanceFrontierWrapperPass::ID = 0;
 
 INITIALIZE_PASS_BEGIN(DominanceFrontierWrapperPass, "domfrontier",
                 "Dominance Frontier Construction", true, true)
 INITIALIZE_PASS_DEPENDENCY(DominatorTreeWrapperPass)
 INITIALIZE_PASS_END(DominanceFrontierWrapperPass, "domfrontier",
                 "Dominance Frontier Construction", true, true)

lib/CodeGen/MachineDominators.cpp

 static bool VerifyMachineDomInfo = true;
 #else
 static bool VerifyMachineDomInfo = false;
 #endif
 static cl::opt<bool, true> VerifyMachineDomInfoX(
     "verify-machine-dom-info", cl::location(VerifyMachineDomInfo),
     cl::desc("Verify machine dominator info (time consuming)"));
 
-namespace llvm {
-template class DomTreeNodeBase<MachineBasicBlock>;
-template class DominatorTreeBase<MachineBasicBlock, false>; // DomTreeBase
-}
+template class llvm::DomTreeNodeBase<MachineBasicBlock>;
+template class llvm::DominatorTreeBase<MachineBasicBlock, false>; // DomTreeBase
 
 char MachineDominatorTree::ID = 0;
 
 INITIALIZE_PASS(MachineDominatorTree, "machinedomtree",
                 "MachineDominator Tree Construction", true, true)
 
 char &llvm::MachineDominatorsID = MachineDominatorTree::ID;