Track in the AST whether a function is constexpr.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@137653 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Serialization/ASTWriterDecl.cpp b/lib/Serialization/ASTWriterDecl.cpp
index 98dad1c..3e1a42c 100644
--- a/lib/Serialization/ASTWriterDecl.cpp
+++ b/lib/Serialization/ASTWriterDecl.cpp
@@ -373,6 +373,7 @@
   Record.push_back(D->isDefaulted());
   Record.push_back(D->isExplicitlyDefaulted());
   Record.push_back(D->hasImplicitReturnZero());
+  Record.push_back(D->isConstexpr());
   Writer.AddSourceLocation(D->getLocEnd(), Record);
 
   Record.push_back(D->param_size());