[Bug tree-optimization/84811] [8 Regression] ICE on valid code at -O3 in 64-bit mode on x86_64-linux-gnu: in smallest_mode_for_size, at stor-layout.c:355

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84811

--- Comment #23 from Martin Liška <marxin at gcc dot gnu.org> ---
Isn't that caused by a undefined behavior in compiler?
Can you please run it in valgrind:
valgrind --leak-check=yes --trace-children=yes ...

Can you please test it with compiler that is built w/o optimization:
make all-host -k CFLAGS="-O0 -g" CXXFLAGS="-O0 -g"