[index] Fix assertion hit when indexing re-declarations of built-in functions.

llvm-svn: 262984

clang/lib/Index/IndexingContext.cpp

@@ -298,6 +298,7 @@ bool IndexingContext::handleDeclOccurrence(const Decl *D, SourceLocation Loc,
   if (Parent)
     Parent = getCanonicalDecl(Parent);
   assert(!Parent || !Parent->isImplicit() ||
+         isa<FunctionDecl>(Parent) ||
          isa<ObjCInterfaceDecl>(Parent) || isa<ObjCMethodDecl>(Parent));
 
   SmallVector<SymbolRelation, 6> FinalRelations;

clang/test/Index/Core/index-source.m

@@ -65,3 +65,8 @@ enum {
   // CHECK-NEXT: RelChild | <no-name> | c:@Ea@One
   Two,
 };
+
+// CHECK: [[@LINE+1]]:13 | typedef/C | jmp_buf | c:index-source.m@T@jmp_buf | <no-cgname> | Def | rel: 0
+typedef int jmp_buf[(18)];
+// CHECK: [[@LINE+1]]:19 | typedef/C | jmp_buf | c:index-source.m@T@jmp_buf | <no-cgname> | Ref | rel: 0
+extern int setjmp(jmp_buf);