https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84071
--- Comment #12 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- Author: ebotcazou Date: Wed Jan 31 10:03:06 2018 New Revision: 257224 URL: https://gcc.gnu.org/viewcvs?rev=257224&root=gcc&view=rev Log: PR rtl-optimization/84071 * combine.c (record_dead_and_set_regs_1): Record the source unmodified for a paradoxical SUBREG on a WORD_REGISTER_OPERATIONS target. Added: trunk/gcc/testsuite/gcc.c-torture/execute/20180131-1.c Modified: trunk/gcc/ChangeLog trunk/gcc/combine.c trunk/gcc/testsuite/ChangeLog