https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96812
--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:d6a05b494b4b714e996a5ca09c5a4a1c41dbd648 commit r11-2963-gd6a05b494b4b714e996a5ca09c5a4a1c41dbd648 Author: Richard Biener <rguent...@suse.de> Date: Thu Aug 27 14:21:33 2020 +0200 rtl-optimization/96812 - remap dependence info on RTL loop unrolling This carries over the PR87609 fix also to RTL loop unrolling. The gcc.dg/torture/pr90328.c testcase otherwise is miscompiled with the tree-ssa-address.c hunk (or alternatively with -fno-ivopts on master). I've tried to find the correct abstraction and adjusted two other duplicate_insn_chain users for which I do not have testcases. There may be other insn-chain copying routines that could be affected but hopefully most appropriately go through CFG hooks. 2020-08-27 Richard Biener <rguent...@suse.de> PR rtl-optimization/96812 * tree-ssa-address.c (copy_ref_info): Also copy dependence info. * cfgrtl.h (duplicate_insn_chain): Adjust prototype. * cfgrtl.c (duplicate_insn_chain): Remap dependence info if requested. (cfg_layout_duplicate_bb): Make sure we remap dependence info. * modulo-sched.c (duplicate_insns_of_cycles): Remap dependence info. (generate_prolog_epilog): Adjust. * config/c6x/c6x.c (hwloop_optimize): Remap dependence info.
