https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66683
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- Note that most of the memory goes to building the expression in GCCs internal representation. The most compile-time spent in a single routine is parsing the float constants (real_from_string, running into mpfr mpfr_strtofr and real_from_mpfr). Memory requirement could be reduced if sharing REAL_CSTs, but of course adjusting the testcase to use different float values would make that even worse.
