Typedefs can be redeclared. That seems like something we should record in

the AST lest we run into some crazy canonicalization bug like PR5874.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92283 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/Sema/SemaTemplateInstantiateDecl.cpp b/lib/Sema/SemaTemplateInstantiateDecl.cpp
index 1ec91bd55e..e909c4f0b9 100644
--- a/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -145,6 +145,11 @@ Decl *TemplateDeclInstantiator::VisitTypedefDecl(TypedefDecl *D) {
   if (Invalid)
     Typedef->setInvalidDecl();
 
+  if (TypedefDecl *Prev = D->getPreviousDeclaration()) {
+    NamedDecl *InstPrev = SemaRef.FindInstantiatedDecl(Prev, TemplateArgs);
+    Typedef->setPreviousDeclaration(cast<TypedefDecl>(InstPrev));
+  }
+
   Owner->addDecl(Typedef);
 
   return Typedef;