PR19278: Align ASTTemplateArgumentListInfo to match its following dynamic array

of TemplateArgumentLocs. 'uint64_t' has higher alignment requirements than a
pointer on some platforms.

llvm-svn: 205068

2 files changed, 4 insertions, 1 deletions

diff --git a/clang/include/clang/AST/TemplateBase.h b/clang/include/clang/AST/TemplateBase.h
index 7810c306dd9..abe106cb4e1 100644
--- a/clang/include/clang/AST/TemplateBase.h
+++ b/clang/include/clang/AST/TemplateBase.h
@@ -567,7 +567,8 @@ struct ASTTemplateArgumentListInfo {
 
     /// Force ASTTemplateArgumentListInfo to the right alignment
     /// for the following array of TemplateArgumentLocs.
-    void *Aligner;
+    llvm::AlignedCharArray<
+        llvm::AlignOf<TemplateArgumentLoc>::Alignment, 1> Aligner;
   };
 
   /// \brief Retrieve the template arguments
diff --git a/clang/lib/AST/TemplateBase.cpp b/clang/lib/AST/TemplateBase.cpp
index 16efb790b68..b068ffafef5 100644
--- a/clang/lib/AST/TemplateBase.cpp
+++ b/clang/lib/AST/TemplateBase.cpp
@@ -511,6 +511,8 @@ const DiagnosticBuilder &clang::operator<<(const DiagnosticBuilder &DB,
 const ASTTemplateArgumentListInfo *
 ASTTemplateArgumentListInfo::Create(ASTContext &C,
                                     const TemplateArgumentListInfo &List) {
+  assert(llvm::alignOf<ASTTemplateArgumentListInfo>() >=
+         llvm::alignOf<TemplateArgumentLoc>());
   std::size_t size = ASTTemplateArgumentListInfo::sizeFor(List.size());
   void *Mem = C.Allocate(size, llvm::alignOf<ASTTemplateArgumentListInfo>());
   ASTTemplateArgumentListInfo *TAI = new (Mem) ASTTemplateArgumentListInfo();