https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93170
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Richard Sandiford <rsand...@gcc.gnu.org>: https://gcc.gnu.org/g:150760dd6dd1899705790183d646fa5fc004554e commit r10-6246-g150760dd6dd1899705790183d646fa5fc004554e Author: Richard Sandiford <richard.sandif...@arm.com> Date: Sat Jan 18 10:59:10 2020 +0000 cselib: Fix handling of multireg values for call insns [PR93170] g:3bd2918594dae34ae84f mishandled the case in which only the tail end of a multireg hard register is invalidated by the call. Walking all the entries should be both safer and more precise. Avoiding cselib_invalidate_regno also means that we no longer walk the same list multiple times (which is something we did before g:3bd2918594dae34ae84f too). 2020-01-27 Richard Sandiford <richard.sandif...@arm.com> gcc/ PR rtl-optimization/93170 * cselib.c (cselib_invalidate_regno_val): New function, split out from... (cselib_invalidate_regno): ...here. (cselib_invalidated_by_call_p): New function. (cselib_process_insn): Iterate over all the hard-register entries in REG_VALUES and invalidate any that cross call-clobbered registers. gcc/testsuite/ * gcc.dg/torture/pr93170.c: New test.
