[Bug middle-end/108506] bit_cast from 32-byte vector generates worse code than memcpy

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108506

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |pinskia at gcc dot gnu.org
           Keywords|fixed-but-no-testcase,      |
                   |needs-bisection             |
           Assignee|unassigned at gcc dot gnu.org      |pinskia at gcc dot 
gnu.org

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to m.cencora from comment #5)
> Almost, there is still some unnecessary stack spill with bit_cast case:

Oh I missed that. I have an idea on how to fix that.


Basically:
  MEM[(struct Foo *)output_7(D) + ivtmp.13_20 * 1] = VIEW_CONVERT_EXPR<struct
Foo>(_1);


should be turned around.
Let me see if I can implement that in gimple fold.