https://gcc.gnu.org/bugzilla/show_bug.cgi?id=14179
--- Comment #77 from Richard Biener <rguenth at gcc dot gnu.org> --- So the "low hanging fruit" remaining is reshape_init_array copying the whole array even if not necessary. INTEGER_CSTs still account for most of the memory use (200MB) apart from C++ preprocessor tokens (530MB) and the actual array of tree pointers for the constructors (2x 130MB at peak).
