On Tue, Jul 17, 2018 at 3:36 PM Richard Biener
<richard.guent...@gmail.com> wrote:
>
> On Tue, Jul 17, 2018 at 3:08 PM Paul Koning <paulkon...@comcast.net> wrote:
> >
> >
> > > On Jul 17, 2018, at 5:46 AM, Richard Biener <richard.guent...@gmail.com>
> > > wrote:
> > >
> > >> ...
> > >
> > > There is not enough information for anyone to help you without
> > > reproducing the issue which is maybe too much to ask for ;)
> > >
> > > Can you debug_tree () the offending decl in gdb?
> >
> > Yes, here it is. I don't know anything about debugging in this area, so
> > tools like debug_tree are good to learn about. How would I interpret its
> > output?
> >
> > pkoning:gcc pkoning$ lldb ./cc1plus -- new_opa.ii -fno-implicit-templates
> > -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi
> > -fdiagnostics-show-location=once -frandom-seed=new_opa.lo -g -O2
> > -std=gnu++1z
> > (lldb) target create "./cc1plus"
> > Current executable set to './cc1plus' (x86_64).
> > (lldb) settings set -- target.run-args "new_opa.ii"
> > "-fno-implicit-templates" "-Wall" "-Wextra" "-Wwrite-strings" "-Wcast-qual"
> > "-Wabi" "-fdiagnostics-show-location=once" "-frandom-seed=new_opa.lo" "-g"
> > "-O2" "-std=gnu++1z"
> > (lldb) b internal_error
> > Breakpoint 1: where = cc1plus`internal_error(char const*, ...) + 104 at
> > diagnostic.c:1441, address = 0x0000000100c21378
> > (lldb) run
> > Process 10880 launched: './cc1plus' (x86_64)
> > cc1plus: warning: -Wabi won't warn about anything [-Wabi]
> > cc1plus: note: -Wabi warns about differences from the most up-to-date ABI,
> > which is also used by default
> > cc1plus: note: use e.g. -Wabi=11 to warn about changes from GCC 7
> > long int std::abs(long int) long long int std::abs(long long int)
> > constexpr double std::abs(double) constexpr float std::abs(float) constexpr
> > long double std::abs(long double) ldiv_t std::div(long int, long int)
> > std::exception::exception() std::exception::exception()
> > std::exception::exception() std::bad_exception::bad_exception()
> > std::bad_exception::bad_exception() std::bad_exception::bad_exception()
> > const char* std::type_info::name() const bool
> > std::type_info::operator!=(const std::type_info&) const std::size_t
> > std::type_info::hash_code() const std::type_info::type_info(const char*)
> > std::type_info::type_info(const char*) std::type_info::type_info(const
> > char*) std::bad_cast::bad_cast() std::bad_cast::bad_cast()
> > std::bad_cast::bad_cast() std::bad_typeid::bad_typeid()
> > std::bad_typeid::bad_typeid() std::bad_typeid::bad_typeid()
> > std::__exception_ptr::exception_ptr::exception_ptr(std::nullptr_t)
> > std::__exception_ptr::exception_ptr::exception_ptr(std::nullptr_t)
> > std::__exception_ptr::exception_ptr::exception_ptr(std::nullptr_t)
> > std::__exception_ptr::exception_ptr::exception_ptr(std::__exception_ptr::exception_ptr&&)
> >
> > std::__exception_ptr::exception_ptr::exception_ptr(std::__exception_ptr::exception_ptr&&)
> >
> > std::__exception_ptr::exception_ptr::exception_ptr(std::__exception_ptr::exception_ptr&&)
> > std::__exception_ptr::exception_ptr&
> > std::__exception_ptr::exception_ptr::operator=(std::__exception_ptr::exception_ptr&&)
> > std::__exception_ptr::exception_ptr::operator bool() const void
> > std::__exception_ptr::swap(std::__exception_ptr::exception_ptr&,
> > std::__exception_ptr::exception_ptr&) void
> > std::__exception_ptr::__dest_thunk(void*)
> > std::__exception_ptr::exception_ptr std::make_exception_ptr(_Ex) constexpr
> > _Tp* std::__addressof(_Tp&) constexpr std::integral_constant<_Tp,
> > __v>::operator std::integral_constant<_Tp, __v>::value_type() const
> > constexpr std::integral_constant<_Tp, __v>::value_type
> > std::integral_constant<_Tp, __v>::operator()() const
> > std::integral_constant<bool, false> constexpr const bool
> > std::integral_constant<bool, false>::value constexpr const bool
> > std::integral_constant<bool, false>::value std::integral_constant<bool,
> > true> constexpr const bool std::integral_constant<bool, true>::value
> > constexpr const bool std::integral_constant<bool, true>::value
> > std::integral_constant<short unsigned int, 0> constexpr const short
> > unsigned int std::integral_constant<short unsigned int, 0>::value constexpr
> > const short unsigned int std::integral_constant<short unsigned int,
> > 0>::value std::__make_unsigned_selector_base::_List<unsigned char, short
> > unsigned int, unsigned int, long unsigned int, long long unsigned int>
> > std::__make_unsigned_selector_base::_List<short unsigned int, unsigned int,
> > long unsigned int, long long unsigned int>
> > std::__make_unsigned_selector_base::_List<unsigned int, long unsigned int,
> > long long unsigned int> std::__make_unsigned_selector_base::_List<long
> > unsigned int, long long unsigned int>
> > std::__make_unsigned_selector_base::_List<long long unsigned int>
> > std::__make_unsigned_selector_base::_List<> constexpr const size_t
> > std::__make_unsigned_selector_base::_List<long long unsigned int>::__size
> > constexpr const size_t std::__make_unsigned_selector_base::_List<long long
> > unsigned int>::__size constexpr const size_t
> > std::__make_unsigned_selector_base::_List<long unsigned int, long long
> > unsigned int>::__size constexpr const size_t
> > std::__make_unsigned_selector_base::_List<long unsigned int, long long
> > unsigned int>::__size constexpr const size_t
> > std::__make_unsigned_selector_base::_List<unsigned int, long unsigned int,
> > long long unsigned int>::__size constexpr const size_t
> > std::__make_unsigned_selector_base::_List<unsigned int, long unsigned int,
> > long long unsigned int>::__size constexpr const size_t
> > std::__make_unsigned_selector_base::_List<short unsigned int, unsigned int,
> > long unsigned int, long long unsigned int>::__size constexpr const size_t
> > std::__make_unsigned_selector_base::_List<short unsigned int, unsigned int,
> > long unsigned int, long long unsigned int>::__size constexpr const size_t
> > std::__make_unsigned_selector_base::_List<unsigned char, short unsigned
> > int, unsigned int, long unsigned int, long long unsigned int>::__size
> > constexpr const size_t std::__make_unsigned_selector_base::_List<unsigned
> > char, short unsigned int, unsigned int, long unsigned int, long long
> > unsigned int>::__size constexpr const size_t
> > std::__make_unsigned_selector_base::_List<unsigned char, short unsigned
> > int, unsigned int, long unsigned int, long long unsigned int>::__size
> > std::__make_unsigned_selector<wchar_t, false, true>
> > std::__make_unsigned_selector_base::__select<2,
> > std::__make_unsigned_selector_base::_List<unsigned char, short unsigned
> > int, unsigned int, long unsigned int, long long unsigned int>, false>
> > constexpr const size_t std::__make_unsigned_selector_base::_List<short
> > unsigned int, unsigned int, long unsigned int, long long unsigned
> > int>::__size std::__make_unsigned_selector_base::__select<2,
> > std::__make_unsigned_selector_base::_List<short unsigned int, unsigned int,
> > long unsigned int, long long unsigned int>, true> std::is_const<wchar_t>
> > constexpr const bool std::integral_constant<bool, false>::value
> > std::is_volatile<wchar_t> std::__match_cv_qualifiers<wchar_t, short
> > unsigned int, false, false> std::__cv_selector<short unsigned int, false,
> > false> std::__make_unsigned_selector<char16_t, false, true>
> > std::is_const<char16_t> std::is_volatile<char16_t>
> > std::__match_cv_qualifiers<char16_t, short unsigned int, false, false>
> > std::__make_unsigned_selector<char32_t, false, true>
> > std::__make_unsigned_selector_base::__select<4,
> > std::__make_unsigned_selector_base::_List<unsigned char, short unsigned
> > int, unsigned int, long unsigned int, long long unsigned int>, false>
> > std::__make_unsigned_selector_base::__select<4,
> > std::__make_unsigned_selector_base::_List<short unsigned int, unsigned int,
> > long unsigned int, long long unsigned int>, false> constexpr const size_t
> > std::__make_unsigned_selector_base::_List<unsigned int, long unsigned int,
> > long long unsigned int>::__size
> > std::__make_unsigned_selector_base::__select<4,
> > std::__make_unsigned_selector_base::_List<unsigned int, long unsigned int,
> > long long unsigned int>, false> constexpr const size_t
> > std::__make_unsigned_selector_base::_List<long unsigned int, long long
> > unsigned int>::__size std::__make_unsigned_selector_base::__select<4,
> > std::__make_unsigned_selector_base::_List<long unsigned int, long long
> > unsigned int>, true> std::is_const<char32_t> std::is_volatile<char32_t>
> > std::__match_cv_qualifiers<char32_t, long unsigned int, false, false>
> > std::__cv_selector<long unsigned int, false, false>
> > std::__make_signed_selector<wchar_t, false, true> std::is_integral<wchar_t>
> > std::remove_cv<wchar_t> std::remove_volatile<wchar_t>
> > std::remove_const<wchar_t> constexpr const bool
> > std::integral_constant<bool, true>::value std::is_enum<wchar_t>
> > std::__make_unsigned_selector<wchar_t, true, false> std::is_integral<short
> > unsigned int> std::remove_cv<short unsigned int> std::remove_volatile<short
> > unsigned int> std::remove_const<short unsigned int> std::is_enum<short
> > unsigned int> std::__make_signed_selector<short unsigned int, true, false>
> > std::is_const<short unsigned int> std::is_volatile<short unsigned int>
> > std::__match_cv_qualifiers<short unsigned int, short int, false, false>
> > std::__cv_selector<short int, false, false>
> > std::__make_signed_selector<char16_t, false, true>
> > std::is_integral<char16_t> std::remove_cv<char16_t>
> > std::remove_volatile<char16_t> std::remove_const<char16_t>
> > std::is_enum<char16_t> std::__make_unsigned_selector<char16_t, true, false>
> > std::__make_signed_selector<char32_t, false, true>
> > std::is_integral<char32_t> std::remove_cv<char32_t>
> > std::remove_volatile<char32_t> std::remove_const<char32_t>
> > std::is_enum<char32_t> std::__make_unsigned_selector<char32_t, true, false>
> > std::is_integral<long unsigned int> std::remove_cv<long unsigned int>
> > std::remove_volatile<long unsigned int> std::remove_const<long unsigned
> > int> std::is_enum<long unsigned int> std::__make_signed_selector<long
> > unsigned int, true, false> std::is_const<long unsigned int>
> > std::is_volatile<long unsigned int> std::__match_cv_qualifiers<long
> > unsigned int, long int, false, false> std::__cv_selector<long int, false,
> > false> decltype (__declval<_Tp>(0)) std::declval() constexpr bool
> > std::__call_is_nt(std::__invoke_memfun_ref) constexpr bool
> > std::__call_is_nt(std::__invoke_memfun_deref) constexpr bool
> > std::__call_is_nt(std::__invoke_memobj_ref) constexpr bool
> > std::__call_is_nt(std::__invoke_memobj_deref) constexpr bool
> > std::__call_is_nt(std::__invoke_other) constexpr _Tp&&
> > std::forward(typename std::remove_reference<_Tp>::type&) constexpr _Tp&&
> > std::forward(typename std::remove_reference<_Tp>::type&&) constexpr
> > typename std::remove_reference<_Tp>::type&& std::move(_Tp&&) constexpr
> > typename std::conditional<std::__move_if_noexcept_cond<_Tp>::value, const
> > _Tp&, _Tp&&>::type std::move_if_noexcept(_Tp&) constexpr _Tp*
> > std::addressof(_Tp&) _Tp std::__exchange(_Tp&, _Up&&) typename
> > std::enable_if<std::__and_<std::__not_<std::__is_tuple_like<_Tp> >,
> > std::is_move_constructible<_Tp>, std::is_move_assignable<_Tp>
> > >::value>::type std::swap(_Tp&, _Tp&) typename
> > std::enable_if<std::__is_swappable<_Tp>::value>::type std::swap(_Tp
> > (&)[_Nm], _Tp (&)[_Nm]) std::nested_exception::nested_exception()
> > std::nested_exception::nested_exception()
> > std::nested_exception::nested_exception() void
> > std::nested_exception::rethrow_nested() const
> > std::__exception_ptr::exception_ptr std::nested_exception::nested_ptr()
> > const std::_Nested_exception<_Except>::_Nested_exception(const _Except&)
> > std::_Nested_exception<_Except>::_Nested_exception(_Except&&) void
> > std::__throw_with_nested_impl(_Tp&&, std::true_type) void
> > std::__throw_with_nested_impl(_Tp&&, std::false_type) void
> > std::throw_with_nested(_Tp&&) std::__rethrow_if_nested_cond<_Ex>
> > std::__rethrow_if_nested_impl(const _Ex*) void
> > std::__rethrow_if_nested_impl(const void*) void
> > std::rethrow_if_nested(const _Ex&) std::bad_alloc::bad_alloc()
> > std::bad_alloc::bad_alloc() std::bad_alloc::bad_alloc()
> > std::bad_array_new_length::bad_array_new_length()
> > std::bad_array_new_length::bad_array_new_length()
> > std::bad_array_new_length::bad_array_new_length() void* operator
> > new(std::size_t, void*) void* operator new [](std::size_t, void*) void
> > operator delete(void*, void*) void operator delete [](void*, void*)
> > constexpr _Tp* std::launder(_Tp*) void* operator new(std::size_t,
> > std::align_val_t)cc1plus was compiled with optimization - stepping may
> > behave oddly; variables may not be available.
> > Process 10880 stopped
> > * thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
> > frame #0: 0x0000000100c21378 cc1plus`internal_error(gmsgid="in %s, at
> > %s:%d") at diagnostic.c:1441 [opt]
> > 1438 internal_error (const char *gmsgid, ...)
> > 1439 {
> > 1440 va_list ap;
> > -> 1441 va_start (ap, gmsgid);
> > 1442 rich_location richloc (line_table, input_location);
> > 1443 diagnostic_impl (&richloc, -1, gmsgid, &ap, DK_ICE);
> > 1444 va_end (ap);
> > Target 0: (cc1plus) stopped.
> > (lldb) frame sel 2
> > frame #2: 0x0000000100074b36
> > cc1plus`import_export_decl(decl=0x000000014269c750) at decl2.c:2877 [opt]
> > 2874 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl));
> > 2875 /* Any code that creates entities with TREE_PUBLIC cleared should
> > 2876 also set DECL_INTERFACE_KNOWN. */
> > -> 2877 gcc_assert (TREE_PUBLIC (decl));
> > 2878 if (TREE_CODE (decl) == FUNCTION_DECL)
> > 2879 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
> > 2880 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
> > (lldb) call debug_tree(decl)
> > <var_decl 0x14269c750 value
> > type <boolean_type 0x1426aa5e8 bool readonly unsigned type_6 QI
> > size <integer_cst 0x142502768 constant 8>
> > unit-size <integer_cst 0x142502780 constant 1>
> > align:8 warn_if_not_align:0 symtab:150 alias-set -1 canonical-type
> > 0x1426aa5e8 precision:1 min <integer_cst 0x1425029d8 0> max <integer_cst
> > 0x142502a08 1>>
> > readonly constant used static tree_1 tree_2 tree_3 unsigned nonlocal
> > in_system_header read decl_1 QI
> > /Users/pkoning/Documents/svn/buildpdp/pdp11-aout/libstdc++-v3/include/type_traits:59:28
> > size <integer_cst 0x142502768 8> unit-size <integer_cst 0x142502780 1>
> > align:8 warn_if_not_align:0 context <record_type 0x1426a7e70
> > integral_constant> initial <integer_cst 0x1425029d8 0>
> > template-info 0x1426a64e0 chain <function_decl 0x1426a0600 __conv_op >>
> > (lldb)
>
> lldb? eh ... ;)
>
> anyhow, this is
>
> namespace std
> {
>
> # 56
> "/Users/pkoning/Documents/svn/buildpdp/pdp11-aout/libstdc++-v3/include/type_traits"
> 3
> template<typename _Tp, _Tp __v>
> struct integral_constant
> {
> static constexpr _Tp value = __v;
> ^^^
>
> which should have TREE_PUBLIC set. My next step would be to watch how
> this flag changes (if it does...)
>
> break at ggc-page.c:1442 (the return stmt of ggc_internal_alloc)
> conditional on result == 0x14269c750
> and then watch *&the-decl->base.public_flag printing said flag when
> the watchpoint hits
> (because you're watching the whole integer containing the bitfield bit).
>
> If that doesn't go anywhere try reducing the source file using creduce
> or by other means.
>
> Maybe look at reset_decl_linkage () and visibility support in general.
Oh, and generally a grep for 'targetm' in cp/ might reveal bits that sound
interesting.
Richard.
> Richard.
>
> > Build/configure info:
> >
> > pkoning:gcc pkoning$ ./xg++ --verbose
> > Using built-in specs.
> > COLLECT_GCC=./xg++
> > Target: pdp11-aout
> > Configured with: ../gcc/configure --target=pdp11-aout
> > --prefix=/usr/local/pdp11-aout --without-x target_alias=pdp11-aout
> > --with-mpc=/usr/local --with-mpfr=/usr/local --with-gmp=/usr/local
> > --disable-libssp --disable-shared --with-newlib
> > --enable-languages=c,c++,fortran --enable-checking=rtl
> > Thread model: single
> > gcc version 9.0.0 20180716 (experimental) (GCC)
> >
> > The new_opa.ii file is attached.
> >
> > paul
> >
