[Bug middle-end/85414] [8 Regression] ICE: in ix86_expand_prologue, at config/i386/i386.c:13810 with -Og -fgcse

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85414

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 #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 43946
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43946&action=edit
gcc8-pr85414.patch

Untested fix.  We really should never generate subreg of subreg, period.