[Bug tree-optimization/91162] [9/10 Regression] ICE: tree check: expected class 'type', have 'exceptional' (error_mark) in useless_type_conversion_p, at gimple-expr.c:86 (error: invalid 'PHI' argument)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91162

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
So somehow autopar doesn't deal with virtual operands being live across the
moved region.  move_block_to_fn simply releases virtual PHI defs which leaves
uses of it in the IL.  It later calls update_ssa anyways so replacing the
defs uses with its bare symbol will do the correct thing.