https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88032
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45009
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45009&action=edit
gcc9-pr88032.patch
Untested fix. The problem as I see is that while operand_subword will for mode
== VOIDmode just pick the mode from the operand's mode, so it is important to
pass it only if the operand has VOIDmode, operand_subword_force actually with
VOIDmode argument acts just as operand_subword that asserts the result is
non-NULL. That is something we don't want in this case, e.g. because op is a
hard register that we need to force into a pseudo to be able to create a subreg
out of it.
