[Bug middle-end/112592] FAIL: c-c++-common/pr111309-1.c -std=gnu++14 (internal compiler error: in expand_fn_using_insn, at internal-fn.cc:216)

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112592

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That seems like a backend bug.
pa_scalar_mode_supported_p returns true for TARGET_64BIT && mode == TImode, but
MAX_FIXED_MODE_SIZE macro doesn't reflect that and is still using the default
definition of GET_MODE_BITSIZE (DImode).
All other targets which support __int128 properly use something like
#define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (TARGET_64BIT ? TImode : DImode)