Speculative fix for va_list/nullability test on Hexagon and PPC.

PowerPC's va_list, at least, is a typedef for an array, which means it
decays to a pointer in parameter position. Since the decayed type is
built from the array element type, the typedef sugar is lost.

More rdar://problem/25846421.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@286533 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Sema/SemaType.cpp b/lib/Sema/SemaType.cpp
index e98737946b7856ee75a815237940f69e93864aab..d43d96544e9a69c5b48cbd1fed600b8bb90e020a 100644 (file)
--- a/lib/Sema/SemaType.cpp
+++ b/lib/Sema/SemaType.cpp
@@ -3921,6 +3921,10 @@ static TypeSourceInfo *GetFullTypeForDeclarator(TypeProcessingState &state,
     }
 
     auto isVaList = [&S](QualType T) -> bool {
+      // Handle array va_list parameters that decayed to pointers.
+      if (auto *decayedTy = T->getAs<DecayedType>())
+        T = decayedTy->getOriginalType();
+
       auto *typedefTy = T->getAs<TypedefType>();
       if (!typedefTy)
         return false;