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>.
llvm-svn: 107551
diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index 4737abc3..2d52bd0 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -31,6 +31,8 @@
using namespace clang;
+unsigned ASTContext::NumImplicitDefaultConstructors;
+unsigned ASTContext::NumImplicitDefaultConstructorsDeclared;
unsigned ASTContext::NumImplicitCopyConstructors;
unsigned ASTContext::NumImplicitCopyConstructorsDeclared;
unsigned ASTContext::NumImplicitCopyAssignmentOperators;
@@ -261,6 +263,9 @@
fprintf(stderr, "Total bytes = %d\n", int(TotalBytes));
// Implicit special member functions.
+ fprintf(stderr, " %u/%u implicit default constructors created\n",
+ NumImplicitDefaultConstructorsDeclared,
+ NumImplicitDefaultConstructors);
fprintf(stderr, " %u/%u implicit copy constructors created\n",
NumImplicitCopyConstructorsDeclared,
NumImplicitCopyConstructors);