[Bug tree-optimization/97008] [openacc] Remove invariant that IFN_UNIQUE is last stmt in bb

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97008

--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> Where's this property used?  grepping finds searches in omp-offload but those
> all(?) search the whole instruction stream.

In ignore_bb_p in gcc/tracer.c, see PR97000 comment 2.