Make tree-ssa-dse.c:normalize_ref return a bool
This patch moves the check for an overlapping byte to normalize_ref
from its callers, so that it's easier to convert to poly_ints later.
It's not really worth it on its own.
2017-11-01 Richard Sandiford <richard.sandiford@linaro.org>
gcc/
* tree-ssa-dse.c (normalize_ref): Check whether the ranges overlap
and return false if not.
(clear_bytes_written_by, live_bytes_read): Update accordingly.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@254313 138bc75d-0d04-0410-961f-82ee72b054a4