https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82259
--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> --- (In reply to Peter Cordes from comment #4) > (In reply to Uroš Bizjak from comment #2) > > A couple of *scc_bt patterns are missing. These are similar to already > > existing *jcc_bt patterns. Combine wants: > > Does gcc also need patterns for bt + cmovcc? Actually, my setcc bt patch interferes with cmovcc. Without the patch, gcc manages to create: sarl %cl, %edi andl $1, %edi cmovne %edx, %eax and when patched gcc creates bt insn, following asm is created: btl %esi, %edi setc %dl testl %edx, %edx cmovne %ecx, %eax. I'll revert the patch.
