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/PCHReaderDecl.cpp b/lib/Frontend/PCHReaderDecl.cpp
index a7b092abb9..8e0d635508 100644
--- a/lib/Frontend/PCHReaderDecl.cpp
+++ b/lib/Frontend/PCHReaderDecl.cpp
@@ -657,6 +657,7 @@ void PCHDeclReader::VisitCXXRecordDecl(CXXRecordDecl *D) {
       Data.HasTrivialCopyAssignment = Record[Idx++];
       Data.HasTrivialDestructor = Record[Idx++];
       Data.ComputedVisibleConversions = Record[Idx++];
+      Data.DeclaredDefaultConstructor = Record[Idx++];
       Data.DeclaredCopyConstructor = Record[Idx++];
       Data.DeclaredCopyAssignment = Record[Idx++];
       Data.DeclaredDestructor = Record[Idx++];