[cfe-commits] r113204 - in /cfe/trunk: include/clang/Basic/DiagnosticSemaKinds.td lib/Sema/SemaDecl.cpp test/Sema/redefinition.c

[Douglas Gregor]

Author: dgregor
Date: Tue Sep  7 10:51:01 2010
New Revision: 113204

URL: http://llvm.org/viewvc/llvm-project?rev=113204&view=rev
Log:
Provide a specific diagnostic when trying to redefine an "extern
inline" function outside of GNU89 mode. Fixes
<rdar://problem/6880464>.


Modified:
    cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
    cfe/trunk/lib/Sema/SemaDecl.cpp
    cfe/trunk/test/Sema/redefinition.c

Modified: cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
URL: 
http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td?rev=113204&r1=113203&r2=113204&view=diff
==============================================================================
--- cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td (original)
+++ cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td Tue Sep  7 10:51:01 
2010
@@ -1737,6 +1737,9 @@
 def err_definition_of_implicitly_declared_member : Error<
   "definition of implicitly declared %select{constructor|copy constructor|"
   "copy assignment operator|destructor}1">;
+def err_redefinition_extern_inline : Error<
+  "redefinition of a 'extern inline' function %0 is not supported in "
+  "%select{C99 mode|C++}1">;
   
 def warn_redefinition_of_typedef : Warning<
   "redefinition of typedef %0 is invalid in C">,

Modified: cfe/trunk/lib/Sema/SemaDecl.cpp
URL: 
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDecl.cpp?rev=113204&r1=113203&r2=113204&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaDecl.cpp (original)
+++ cfe/trunk/lib/Sema/SemaDecl.cpp Tue Sep  7 10:51:01 2010
@@ -4806,7 +4806,12 @@
   const FunctionDecl *Definition;
   if (FD->hasBody(Definition) &&
       !canRedefineFunction(Definition, getLangOptions())) {
-    Diag(FD->getLocation(), diag::err_redefinition) << FD->getDeclName();
+    if (getLangOptions().GNUMode && Definition->isInlineSpecified() &&
+        Definition->getStorageClass() == SC_Extern)
+      Diag(FD->getLocation(), diag::err_redefinition_extern_inline)
+        << FD->getDeclName() << getLangOptions().CPlusPlus;
+    else
+      Diag(FD->getLocation(), diag::err_redefinition) << FD->getDeclName();
     Diag(Definition->getLocation(), diag::note_previous_definition);
   }
 

Modified: cfe/trunk/test/Sema/redefinition.c
URL: 
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Sema/redefinition.c?rev=113204&r1=113203&r2=113204&view=diff
==============================================================================
--- cfe/trunk/test/Sema/redefinition.c (original)
+++ cfe/trunk/test/Sema/redefinition.c Tue Sep  7 10:51:01 2010
@@ -8,3 +8,7 @@
   return 0;
 }
 int x = 1;
+
+// <rdar://problem/6880464>
+extern inline int g(void) { return 0; } // expected-note{{previous definition}}
+int g(void) { return 0; } // expected-error{{redefinition of a 'extern inline' 
function 'g' is not supported in C99 mode}}


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