Hi Richard,

On Thu, 2023-09-28 10:55:46 +0100, Richard Sandiford <richard.sandiford@arm.com> wrote:
> poly_int was written before the switch to C++11 and so couldn't
> use explicit default constructors.  This led to an awkward split
> between poly_int_pod and poly_int.  poly_int simply inherited from
> poly_int_pod and added constructors, with the argumentless constructor
> having an empty body.  But inheritance meant that poly_int had to
> repeat the assignment operators from poly_int_pod (again, no C++11,
> so no "using" to inherit base-class implementations).
[...]

I haven't bisected it, but I guess your patch caused this:

[all 2023-10-02 06:59:02] /var/lib/laminar/run/gcc-local/75/local-toolchain-install/bin/g++ -std=c++11  -fno-PIE -c   -g -O2   -DIN_GCC    -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -Wconditionally-supported -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -fno-common  -DHAVE_CONFIG_H -fno-PIE -I. -I. -I../../gcc/gcc -I../../gcc/gcc/. -I../../gcc/gcc/../include  -I../../gcc/gcc/../libcpp/include -I../../gcc/gcc/../libcody  -I../../gcc/gcc/../libdecnumber -I../../gcc/gcc/../libdecnumber/bid -I../libdecnumber -I../../gcc/gcc/../libbacktrace   -o rtl-tests.o -MT rtl-tests.o -MMD -MP -MF ./.deps/rtl-tests.TPo ../../gcc/gcc/rtl-tests.cc
[all 2023-10-02 06:59:04] In file included from ../../gcc/gcc/coretypes.h:480,
[all 2023-10-02 06:59:04]                  from ../../gcc/gcc/rtl-tests.cc:22:
[all 2023-10-02 06:59:04] ../../gcc/gcc/poly-int.h: In instantiation of 'constexpr poly_int<N, T>::poly_int(poly_int_full, const Cs& ...) [with Cs = {int, int}; unsigned int N = 1; C = long int]':
[all 2023-10-02 06:59:04] ../../gcc/gcc/poly-int.h:439:13:   required from here
[all 2023-10-02 06:59:04] ../../gcc/gcc/rtl-tests.cc:249:25:   in 'constexpr' expansion of 'poly_int<1, long int>(1, 1)'
[all 2023-10-02 06:59:04] ../../gcc/gcc/poly-int.h:453:5: error: too many initializers for 'long int [1]'
[all 2023-10-02 06:59:04]   453 |   : coeffs { (typename poly_coeff_traits<C>::
[all 2023-10-02 06:59:04]       |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[all 2023-10-02 06:59:04]   454 |               template init_cast<Cs>::type (cs))... } {}
[all 2023-10-02 06:59:04]       |               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[all 2023-10-02 06:59:04] make[1]: *** [Makefile:1188: rtl-tests.o] Error 1
[all 2023-10-02 06:59:04] make[1]: Leaving directory '/var/lib/laminar/run/gcc-local/75/toolchain-build/gcc'
[all 2023-10-02 06:59:05] make: *** [Makefile:4993: all-gcc] Error 2


(Full build log at
http://toolchain.lug-owl.de/laminar/jobs/gcc-local/75 .  That's in a
Docker container on amd64-linux with the host gcc being at fairly new
at basepoints/gcc-14-3827-g30e6ee07458)

MfG, JBG

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