[LLVMbugs] [Bug 22732] New: should not save and reload list of dynamic classes when building with modules

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=22732

            Bug ID: 22732
           Summary: should not save and reload list of dynamic classes
                    when building with modules
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Modules
          Assignee: unassignedclangbugs at nondot.org
          Reporter: richard-llvm at metafoo.co.uk
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

We waste a lot of time in C++ modules builds saving and reloading the list of
dynamic classes. We should find a better way to model this information that is
less brutish (maybe we can instead save a list of locally-defined key
functions?).

In any case, loading imported modules' lists when building another module is
really dumb -- we should either handle the local dynamic classes at the end of
each module, or we should handle all dynamic classes at the end of the
importing TU; processing all dynamic classes at the end of every module makes
no sense.

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