From b07c0d7085fc35c2891a21dd4170c26eb6f6d1bd Mon Sep 17 00:00:00 2001
From: Jordan Rose <jordan_rose@apple.com>
Date: Fri, 11 Nov 2016 00:55:14 +0000
Subject: [PATCH] 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
---
 clang/lib/Sema/SemaType.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/clang/lib/Sema/SemaType.cpp b/clang/lib/Sema/SemaType.cpp
index e987379..d43d965 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;
-- 
2.7.4