3 files changed, 14 insertions, 21 deletions

diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index 761876988ac..d115f264ba7 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -935,9 +935,8 @@ void CGDebugInfo::CollectRecordFields(const RecordDecl *record,
 
     // Static and non-static members should appear in the same order as
     // the corresponding declarations in the source program.
-    for (RecordDecl::decl_iterator I = record->decls_begin(),
-           E = record->decls_end(); I != E; ++I)
-      if (const VarDecl *V = dyn_cast<VarDecl>(*I)) {
+    for (const auto *I : record->decls())
+      if (const auto *V = dyn_cast<VarDecl>(I)) {
         // Reuse the existing static member declaration if one exists
         llvm::DenseMap<const Decl *, llvm::WeakVH>::iterator MI =
             StaticDataMemberCache.find(V->getCanonicalDecl());
@@ -948,7 +947,7 @@ void CGDebugInfo::CollectRecordFields(const RecordDecl *record,
               llvm::DIDerivedType(cast<llvm::MDNode>(MI->second)));
         } else
           elements.push_back(CreateRecordStaticField(V, RecordTy));
-      } else if (FieldDecl *field = dyn_cast<FieldDecl>(*I)) {
+      } else if (const auto *field = dyn_cast<FieldDecl>(I)) {
         CollectRecordNormalField(field, layout.getFieldOffset(fieldNo),
                                  tunit, elements, RecordTy);
 
@@ -1130,9 +1129,8 @@ CollectCXXMemberFunctions(const CXXRecordDecl *RD, llvm::DIFile Unit,
   // Since we want more than just the individual member decls if we
   // have templated functions iterate over every declaration to gather
   // the functions.
-  for(DeclContext::decl_iterator I = RD->decls_begin(),
-        E = RD->decls_end(); I != E; ++I) {
-    if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(*I)) {
+  for(const auto *I : RD->decls()) {
+    if (const auto *Method = dyn_cast<CXXMethodDecl>(I)) {
       // Reuse the existing member function declaration if it exists.
       // It may be associated with the declaration of the type & should be
       // reused as we're building the definition.
@@ -1149,8 +1147,7 @@ CollectCXXMemberFunctions(const CXXRecordDecl *RD, llvm::DIFile Unit,
           EltTys.push_back(CreateCXXMemberFunction(Method, Unit, RecordTy));
       } else
         EltTys.push_back(MI->second);
-    } else if (const FunctionTemplateDecl *FTD =
-                   dyn_cast<FunctionTemplateDecl>(*I)) {
+    } else if (const auto *FTD = dyn_cast<FunctionTemplateDecl>(I)) {
       // Add any template specializations that have already been seen. Like
       // implicit member functions, these may have been added to a declaration
       // in the case of vtable-based debug info reduction.
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 9b3e32952e1..a5cd9e34af5 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -2832,13 +2832,12 @@ void CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) {
 
 /// EmitNamespace - Emit all declarations in a namespace.
 void CodeGenModule::EmitNamespace(const NamespaceDecl *ND) {
-  for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end();
-       I != E; ++I) {
-    if (const VarDecl *VD = dyn_cast<VarDecl>(*I))
+  for (auto *I : ND->decls()) {
+    if (const auto *VD = dyn_cast<VarDecl>(I))
       if (VD->getTemplateSpecializationKind() != TSK_ExplicitSpecialization &&
           VD->getTemplateSpecializationKind() != TSK_Undeclared)
         continue;
-    EmitTopLevelDecl(*I);
+    EmitTopLevelDecl(I);
   }
 }
 
@@ -2850,17 +2849,16 @@ void CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) {
     return;
   }
 
-  for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end();
-       I != E; ++I) {
+  for (auto *I : LSD->decls()) {
     // Meta-data for ObjC class includes references to implemented methods.
     // Generate class's method definitions first.
-    if (ObjCImplDecl *OID = dyn_cast<ObjCImplDecl>(*I)) {
+    if (auto *OID = dyn_cast<ObjCImplDecl>(I)) {
       for (ObjCContainerDecl::method_iterator M = OID->meth_begin(),
            MEnd = OID->meth_end();
            M != MEnd; ++M)
         EmitTopLevelDecl(*M);
     }
-    EmitTopLevelDecl(*I);
+    EmitTopLevelDecl(I);
   }
 }
 
diff --git a/clang/lib/CodeGen/ModuleBuilder.cpp b/clang/lib/CodeGen/ModuleBuilder.cpp
index a51abf03d5c..d54a4a8186f 100644
--- a/clang/lib/CodeGen/ModuleBuilder.cpp
+++ b/clang/lib/CodeGen/ModuleBuilder.cpp
@@ -93,10 +93,8 @@ namespace {
       // In C++, we may have member functions that need to be emitted at this 
       // point.
       if (Ctx->getLangOpts().CPlusPlus && !D->isDependentContext()) {
-        for (DeclContext::decl_iterator M = D->decls_begin(), 
-                                     MEnd = D->decls_end();
-             M != MEnd; ++M)
-          if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(*M))
+        for (auto *M : D->decls())
+          if (auto *Method = dyn_cast<CXXMethodDecl>(M))
             if (Method->doesThisDeclarationHaveABody() &&
                 (Method->hasAttr<UsedAttr>() || 
                  Method->hasAttr<ConstructorAttr>()))