Stop "using namespace llvm"

This avoids ambiguities between llvm and swift types with the same name.

Author: swiftix

include/swift/SILOptimizer/Analysis/ClassHierarchyAnalysis.h

@@ -21,8 +21,6 @@
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/Support/Debug.h"
 
-using namespace llvm;
-
 namespace swift {
 
 class SILModule;
@@ -32,7 +30,8 @@ class ClassHierarchyAnalysis : public SILAnalysis {
   typedef SmallVector<ClassDecl *, 8> ClassList;
   typedef SmallPtrSet<ClassDecl *, 32> ClassSet;
   typedef SmallVector<NominalTypeDecl *, 8> NominalTypeList;
-  typedef DenseMap<ProtocolDecl *, NominalTypeList> ProtocolImplementations;
+  typedef llvm::DenseMap<ProtocolDecl *, NominalTypeList>
+      ProtocolImplementations;
 
   ClassHierarchyAnalysis(SILModule *Mod)
       : SILAnalysis(AnalysisKind::ClassHierarchy), M(Mod) {
@@ -101,10 +100,10 @@ class ClassHierarchyAnalysis : public SILAnalysis {
   SILModule *M;
 
   /// A cache that maps a class to all of its known direct subclasses.
-  DenseMap<ClassDecl*, ClassList> DirectSubclassesCache;
+  llvm::DenseMap<ClassDecl*, ClassList> DirectSubclassesCache;
 
   /// A cache that maps a class to all of its known indirect subclasses.
-  DenseMap<ClassDecl*, ClassList> IndirectSubclassesCache;
+  llvm::DenseMap<ClassDecl*, ClassList> IndirectSubclassesCache;
 
   /// A cache that maps a protocol to all of its known implementations.
   ProtocolImplementations ProtocolImplementationsCache;

lib/SILOptimizer/IPO/PerformanceInliner.cpp

@@ -286,7 +286,7 @@ namespace {
 
 
 void ConstantTracker::trackInst(SILInstruction *inst) {
-  if (auto *LI = dyn_cast<swift::LoadInst>(inst)) {
+  if (auto *LI = dyn_cast<LoadInst>(inst)) {
     SILValue baseAddr = scanProjections(LI->getOperand());
     if (SILInstruction *loadLink = getMemoryContent(baseAddr))
        links[LI] = loadLink;