https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80960
--- Comment #31 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-9 branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:6cb5edbf7e6724ff014954863989d7444ee84c6a commit r9-9540-g6cb5edbf7e6724ff014954863989d7444ee84c6a Author: Richard Biener <rguent...@suse.de> Date: Wed Jan 27 15:35:52 2021 +0100 rtl-optimization/80960 - avoid creating garbage RTL in DSE The following avoids repeatedly turning VALUE RTXen into sth useful and re-applying a constant offset through get_addr via DSE check_mem_read_rtx. Instead perform this once for all stores to be visited in check_mem_read_rtx. This avoids allocating 1.6GB of garbage PLUS RTXen on the PR80960 testcase, fixing the memory usage regression from old GCC. 2021-01-27 Richard Biener <rguent...@suse.de> PR rtl-optimization/80960 * dse.c (check_mem_read_rtx): Call get_addr on the offsetted address. (cherry picked from commit a523add327c6cfdd68cf9b788ea808068d0f508c)
