https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104637
--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-10 branch has been updated by Vladimir Makarov <vmaka...@gcc.gnu.org>: https://gcc.gnu.org/g:688703569091edfd0400523d85cbb44d15aa61ea commit r10-10830-g688703569091edfd0400523d85cbb44d15aa61ea Author: Vladimir N. Makarov <vmaka...@redhat.com> Date: Mon Feb 28 16:43:50 2022 -0500 [PR104637] LRA: Split hard regs as many as possible on one subpass LRA hard reg split subpass is a small subpass used as the last resort for LRA when it can not assign a hard reg to a reload pseudo by other ways (e.g. by spilling non-reload pseudos). For simplicity the subpass works on one split base (as each split changes pseudo live range info). In this case it results in reaching maximal possible number of subpasses. The patch implements as many non-overlapping hard reg splits splits as possible on each subpass. gcc/ChangeLog: PR rtl-optimization/104637 * lra-assigns.c (lra_split_hard_reg_for): Split hard regs as many as possible on one subpass. gcc/testsuite/ChangeLog: PR rtl-optimization/104637 * gcc.target/i386/pr104637.c: New.
