https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82897
Uroš Bizjak <ubizjak at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED Last reconfirmed| |2017-11-08 Assignee|unassigned at gcc dot gnu.org |ubizjak at gmail dot com Ever confirmed|0 |1 --- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> --- Created attachment 42561 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42561&action=edit Prototype patch This patch changes predicate for mask register to nonimmediate operand. This way, combine is able to simplify sequences of zero-extend and subreg operators to a simple move.