> gcc/
> PR rtl-optimization/66076
> * rtlanal.c (generic_subrtx_iterator ::add_single_to_queue):
> Don't grow the heap array if it is already big enough from a
> previous iteration.
>
> gcc/testsuite/
> PR rtl-optimization/66076
> * gcc.dg/torture/pr66076.c: Ne
The rtx iterators start out using a stack worklist but fall back to
a heap worklist if the stack one turns out to be too small (which is rare).
PR 66076 showed up a bug in the code that makes the switch from the stack
worklist to the heap worklist: the heap one might already have been
allocated if
