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* ipa-icf.c (sem_function::equals_wpa): Match CXX_CONSTRUCTOR_P and CXX_DESTURCTOR_P. For consutrctors match ODR type of class they are building; for methods check ODR type of class they belong to if they may lead to a polymorphic call. (sem_function::compare_polymorphic_p): Be bit smarter about testing when function may lead to a polymorphic call. (sem_function::compare_type_list): Remove. (sem_variable::equals): Update use of compatible_types_p. (sem_variable::parse_tree_refs): Remove. (sem_item_optimizer::filter_removed_items): Do not filter out CXX cdtor. * ipa-icf-gimple.c (func_checker::compare_decl): Do polymorphic matching here. (func_checker::compatible_polymorphic_types_p): Break out from ... (unc_checker::compatible_types_p): ... here. * ipa-icf-gimple.h (func_checker::compatible_polymorphic_types_p): Declare. (unc_checker::compatible_types_p): Update. * ipa-icf.h (compare_type_list, parse_tree_refs, compare_sections): Remove. From-SVN: r221406
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