Lazily declare default constructors. We now delay the construction of

declarations for implicit default constructors, copy constructors,
copy assignment operators, and destructors. On a "simple" translation
unit that includes a bunch of C++ standard library headers, we
generate relatively few of these implicit declarations now:

  4/159 implicit default constructors created
  18/236 implicit copy constructors created
  70/241 implicit copy assignment operators created
  0/173 implicit destructors created

And, on this translation unit, this optimization doesn't really
provide any benefit. I'll do some more performance measurements soon,
but this completes the implementation work for <rdar://problem/8151045>.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@107551 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/Frontend/PCHWriterDecl.cpp b/lib/Frontend/PCHWriterDecl.cpp
index 3a053e283d..2383a75bd0 100644
--- a/lib/Frontend/PCHWriterDecl.cpp
+++ b/lib/Frontend/PCHWriterDecl.cpp
@@ -654,6 +654,7 @@ void PCHDeclWriter::VisitCXXRecordDecl(CXXRecordDecl *D) {
       Record.push_back(Data.HasTrivialCopyAssignment);
       Record.push_back(Data.HasTrivialDestructor);
       Record.push_back(Data.ComputedVisibleConversions);
+      Record.push_back(Data.DeclaredDefaultConstructor);
       Record.push_back(Data.DeclaredCopyConstructor);
       Record.push_back(Data.DeclaredCopyAssignment);
       Record.push_back(Data.DeclaredDestructor);