PR2044: reject declarations of functions returning variably modified
types.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71941 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index 1ed063a..077658c 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -2344,6 +2344,13 @@
if (NewFD->isInvalidDecl())
return;
+ if (NewFD->getResultType()->isVariablyModifiedType()) {
+ // Functions returning a variably modified type violate C99 6.7.5.2p2
+ // because all functions have linkage.
+ Diag(NewFD->getLocation(), diag::err_vm_func_decl);
+ return NewFD->setInvalidDecl();
+ }
+
// Semantic checking for this function declaration (in isolation).
if (getLangOptions().CPlusPlus) {
// C++-specific checks.