Fix isThisDeclarationADefinition for extern following tentative.

An extern declaration following a tentative definition should not itself be
considered a tentative definition.
Fixes pr14614.

llvm-svn: 170377

diff --git a/clang/lib/AST/Decl.cpp b/clang/lib/AST/Decl.cpp
index 538dcee..4e4bc0e 100644 (file)
--- a/clang/lib/AST/Decl.cpp
+++ b/clang/lib/AST/Decl.cpp
@@ -1220,7 +1220,7 @@ VarDecl::DefinitionKind VarDecl::isThisDeclarationADefinition(
        getStorageClassAsWritten() == SC_PrivateExtern) {
     for (const VarDecl *PrevVar = getPreviousDecl();
          PrevVar; PrevVar = PrevVar->getPreviousDecl()) {
-      if (PrevVar->getLinkage() == InternalLinkage && PrevVar->hasInit())
+      if (PrevVar->getLinkage() == InternalLinkage)
         return DeclarationOnly;
     }
   }

diff --git a/clang/test/Sema/extern-redecl.c b/clang/test/Sema/extern-redecl.c
index c176725..ae4386e 100644 (file)
--- a/clang/test/Sema/extern-redecl.c
+++ b/clang/test/Sema/extern-redecl.c
@@ -20,3 +20,5 @@ int PR10013(void) {
   return PR10013_x; // expected-warning{{incompatible pointer to integer conversion}}
 }
 
+static int test1_a[]; // expected-warning {{tentative array definition assumed to have one element}}
+extern int test1_a[];