Don't crash with -Wlarge-by-value-copy and a dependent type. PR11726.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147812 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 7 insertions, 2 deletions

diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index b541e7d9e7..4a804bfcff 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -6777,7 +6777,7 @@ void Sema::DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Param,
 
   // Warn if the return value is pass-by-value and larger than the specified
   // threshold.
-  if (ReturnTy.isPODType(Context)) {
+  if (!ReturnTy->isDependentType() && ReturnTy.isPODType(Context)) {
     unsigned Size = Context.getTypeSizeInChars(ReturnTy).getQuantity();
     if (Size > LangOpts.NumLargeByValueCopy)
       Diag(D->getLocation(), diag::warn_return_value_size)
@@ -6788,7 +6788,7 @@ void Sema::DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Param,
   // threshold.
   for (; Param != ParamEnd; ++Param) {
     QualType T = (*Param)->getType();
-    if (!T.isPODType(Context))
+    if (T->isDependentType() || !T.isPODType(Context))
       continue;
     unsigned Size = Context.getTypeSizeInChars(T).getQuantity();
     if (Size > LangOpts.NumLargeByValueCopy)
diff --git a/test/SemaCXX/warn-large-by-value-copy.cpp b/test/SemaCXX/warn-large-by-value-copy.cpp
index 39dbd7697d..3e419ec08f 100644
--- a/test/SemaCXX/warn-large-by-value-copy.cpp
+++ b/test/SemaCXX/warn-large-by-value-copy.cpp
@@ -40,3 +40,8 @@ void g() {
 }
 
 }
+
+template<typename T> class DependentPOD {
+  enum b { x };
+  b foo() { return x; }
+};