https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93221
--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Andre Simoes Dias Vieira <avie...@gcc.gnu.org>: https://gcc.gnu.org/g:bcf3fa7cf5a3d024b507f68ffdfab037f4820781 commit r10-6326-gbcf3fa7cf5a3d024b507f68ffdfab037f4820781 Author: Andre Vieira <andre.simoesdiasvie...@arm.com> Date: Wed Jan 29 14:23:22 2020 +0000 IRA: Revert 11b8091fb to fix PR 93221 A previous change to simplify LRA introduced in 11b809 (From-SVN: r279550) disabled hard register splitting for -O0. This causes a problem on aarch64 in cases where parameters are passed in multiple registers (in the bug report an OI passed in 2 V4SI registers). This is mandated by the AAPCS. gcc/ChangeLog: 2020-01-29 Joel Hutton <joel.hut...@arm.com> PR target/93221 * ira.c (ira): Revert use of simplified LRA algorithm. gcc/testsuite/ChangeLog: 2020-01-29 Joel Hutton <joel.hut...@arm.com> PR target/93221 * gcc.target/aarch64/pr93221.c: New test.