Replace Sema's map of locally-scoped extern "C" declarations with a DeclContext
of extern "C" declarations. This is simpler and vastly more efficient for
modules builds (we no longer need to load *all* extern "C" declarations to
determine if we have a redeclaration).
No functionality change intended.
llvm-svn: 231538
diff --git a/clang/lib/Serialization/ASTCommon.cpp b/clang/lib/Serialization/ASTCommon.cpp
index 04425ac..85c574c 100644
--- a/clang/lib/Serialization/ASTCommon.cpp
+++ b/clang/lib/Serialization/ASTCommon.cpp
@@ -94,6 +94,7 @@
switch (DC->getDeclKind()) {
// These entities may have multiple definitions.
case Decl::TranslationUnit:
+ case Decl::ExternCContext:
case Decl::Namespace:
case Decl::LinkageSpec:
return nullptr;
@@ -149,7 +150,11 @@
bool serialization::isRedeclarableDeclKind(unsigned Kind) {
switch (static_cast<Decl::Kind>(Kind)) {
- case Decl::TranslationUnit: // Special case of a "merged" declaration.
+ case Decl::TranslationUnit:
+ case Decl::ExternCContext:
+ // Special case of a "merged" declaration.
+ return true;
+
case Decl::Namespace:
case Decl::NamespaceAlias:
case Decl::Typedef: