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.

llvm-svn: 286533

1 files changed, 4 insertions, 0 deletions

diff --git a/clang/lib/Sema/SemaType.cpp b/clang/lib/Sema/SemaType.cpp
index e98737946b7..d43d96544e9 100644
--- a/clang/lib/Sema/SemaType.cpp
+++ b/clang/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;