[Bug middle-end/85567] [7/8/9 Regression] internal compiler error: in gimplify_modify_expr, at gimplify.c:5797 when using sincos()

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85567

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2018-04-30
      Known to work|                            |6.4.0
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot 
gnu.org
   Target Milestone|---                         |7.4
            Summary|internal compiler error: in |[7/8/9 Regression] internal
                   |gimplify_modify_expr, at    |compiler error: in
                   |gimplify.c:5797 when using  |gimplify_modify_expr, at
                   |sincos()                    |gimplify.c:5797 when using
                   |                            |sincos()
     Ever confirmed|0                           |1
      Known to fail|                            |7.1.0, 8.0.1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  Happens during inlining when folding

# .MEM = VDEF <.MEM>
sincos (x_2(D), sinx_3(D), cosx_4(D));

which runs through the GENERIC call folder which replaces sincos with
cexpi:

*sinx_3(D) = IMAGPART_EXPR <SAVE_EXPR <__builtin_cexpi (x_2(D))>>;, *cosx_4(D)
= REALPART_EXPR <SAVE_EXPR <__builtin_cexpi (x_2(D))>>;

Mine.