// Handle attributes prior to checking for duplicates in MergeVarDecl
ProcessDeclAttributes(S, NewTD, D);
- // Merge the decl with the existing one if appropriate. If the decl is
- // in an outer scope, it isn't the same thing.
- FilterLookupForScope(*this, Previous, DC, S, /*ConsiderLinkage*/ false);
- if (!Previous.empty()) {
- Redeclaration = true;
- MergeTypeDefDecl(NewTD, Previous);
- }
-
// C99 6.7.7p2: If a typedef name specifies a variably modified type
// then it shall have block scope.
+ // Note that variably modified types must be fixed before merging the decl so
+ // that redeclarations will match.
QualType T = NewTD->getUnderlyingType();
if (T->isVariablyModifiedType()) {
setFunctionHasBranchProtectedScope();
}
}
+ // Merge the decl with the existing one if appropriate. If the decl is
+ // in an outer scope, it isn't the same thing.
+ FilterLookupForScope(*this, Previous, DC, S, /*ConsiderLinkage*/ false);
+ if (!Previous.empty()) {
+ Redeclaration = true;
+ MergeTypeDefDecl(NewTD, Previous);
+ }
+
// If this is the C FILE type, notify the AST context.
if (IdentifierInfo *II = NewTD->getIdentifier())
if (!NewTD->isInvalidDecl() &&
-// RUN: %clang_cc1 %s -verify -fsyntax-only -pedantic
+// RUN: %clang_cc1 %s -verify -fsyntax-only -pedantic -Wno-typedef-redefinition
+// Make sure we accept a single typedef
+typedef int (*a)[!.0]; // expected-warning{{size of static array must be an integer constant expression}}
+
+// And make sure we accept identical redefinitions in system headers
+// (The test uses -Wno-typedef-redefinition to simulate this.)
typedef int (*a)[!.0]; // expected-warning{{size of static array must be an integer constant expression}}