https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97417
--- Comment #36 from Levy <admin at levyhsu dot com> ---
It seems get_si_mem_base_reg() were called repeatly FOR_BB_INSNS from both
pass_shorten_memrefs::analyze and pass_shorten_memrefs::transform
Correct me if I'm wrong:
It seems we need some data structure (a linked list should work) to store the
zero/sign extend when we strip it off like:
if (GET_CODE (mem) == ZERO_EXTEND
|| GET_CODE (mem) == SIGN_EXTEND)
mem = XEXP (mem, 0);
in each insns.
Then in pass_shorten_memrefs::transform(), each time get_si_mem_base_reg() is
called, we check whether if we need to put it back.
