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authorMartin Sebor <msebor@redhat.com>2017-06-16 03:48:59 +0000
committerMartin Sebor <msebor@gcc.gnu.org>2017-06-15 21:48:59 -0600
commitc3684b7b86da9b6b01f6fb274227fc6401df053e (patch)
tree921877ef9f69c6bac6285495a3eec052a4fad2a3 /gcc/substring-locations.h
parent6a382041ddccd829db190f7c112ecfff2e7d369a (diff)
downloadgcc-c3684b7b86da9b6b01f6fb274227fc6401df053e.tar.gz
PR c++/80560 - warn on undefined memory operations involving non-trivial types
gcc/c-family/ChangeLog: PR c++/80560 * c.opt (-Wclass-memaccess): New option. gcc/cp/ChangeLog: PR c++/80560 * call.c (first_non_public_field, maybe_warn_class_memaccess): New functions. (has_trivial_copy_assign_p, has_trivial_copy_p): Ditto. (build_cxx_call): Call maybe_warn_class_memaccess. gcc/ChangeLog: PR c++/80560 * dumpfile.c (dump_register): Avoid calling memset to initialize a class with a default ctor. * gcc.c (struct compiler): Remove const qualification. * genattrtab.c (gen_insn_reserv): Replace memset with initialization. * hash-table.h: Ditto. * ipa-cp.c (allocate_and_init_ipcp_value): Replace memset with assignment. * ipa-prop.c (ipa_free_edge_args_substructures): Ditto. * omp-low.c (lower_omp_ordered_clauses): Replace memset with default ctor. * params.h (struct param_info): Make struct members non-const. * tree-switch-conversion.c (emit_case_bit_tests): Replace memset with default initialization. * vec.h (vec_copy_construct, vec_default_construct): New helper functions. (vec<T>::copy, vec<T>::splice, vec<T>::reserve): Replace memcpy with vec_copy_construct. (vect<T>::quick_grow_cleared): Replace memset with default ctor. (vect<T>::vec_safe_grow_cleared, vec_safe_grow_cleared): Same. * doc/invoke.texi (-Wclass-memaccess): Document. libcpp/ChangeLog: PR c++/80560 * line-map.c (line_maps::~line_maps): Avoid calling htab_delete with a null pointer. (linemap_init): Avoid calling memset on an object of a non-trivial type. libitm/ChangeLog: PR c++/80560 * beginend.cc (GTM::gtm_thread::rollback): Avoid calling memset on an object of a non-trivial type. (GTM::gtm_transaction_cp::commit): Use assignment instead of memcpy to copy an object. * method-ml.cc (orec_iterator::reinit): Avoid -Wclass-memaccess. gcc/testsuite/ChangeLog: PR c++/80560 * g++.dg/Wclass-memaccess.C: New test. From-SVN: r249234
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