Check for non-POD vararg argument type after default argument promotion, not

before, so we don't incorrectly think arguments of function type are non-POD.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159290 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Sema/SemaExpr.cpp

@@ -679,7 +679,7 @@ ExprResult Sema::DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT,
 
   // Diagnostics regarding non-POD argument types are
   // emitted along with format string checking in Sema::CheckFunctionCall().
-  if (isValidVarArgType(Ty) == VAK_Invalid) {
+  if (isValidVarArgType(E->getType()) == VAK_Invalid) {
     // Turn this into a trap.
     CXXScopeSpec SS;
     SourceLocation TemplateKWLoc;

test/CodeGen/varargs.c

@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -emit-llvm -o - %s
+// RUN: %clang_cc1 -emit-llvm -o - %s | FileCheck %s
 
 
 // PR6433 - Don't crash on va_arg(typedef).
@@ -9,3 +9,9 @@ void focus_changed_cb () {
     mfloat = __builtin_va_arg((pa), gdouble);
 }
 
+void vararg(int, ...);
+void function_as_vararg() {
+  // CHECK: define {{.*}}function_as_vararg
+  // CHECK-NOT: llvm.trap
+  vararg(0, focus_changed_cb);
+}