https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86547
--- Comment #7 from Andreas Krebbel <krebbel at gcc dot gnu.org> --- Author: krebbel Date: Mon Jul 30 08:30:06 2018 New Revision: 263063 URL: https://gcc.gnu.org/viewcvs?rev=263063&root=gcc&view=rev Log: lra: consider clobbers when selecting hard_regno to spill The idea behind the rclass loop in spill_hard_reg_in_range() seems to be: find a hard_regno, which in general conflicts with reload regno, but does not do so between `from` and `to`, and then do the live range splitting based on this information. To check the absence of conflicts, we make use of insn_bitmap, which does not contain insns which clobber the hard_regno. gcc/ChangeLog: 2018-07-30 Ilya Leoshkevich <i...@linux.ibm.com> PR target/86547 * lra-constraints.c (spill_hard_reg_in_range): When selecting the hard_regno, make sure no insn between `from` and `to` clobbers it. Modified: trunk/gcc/ChangeLog trunk/gcc/lra-constraints.c
