Merging GET_ITER and GET_YIELD_FROM_ITER will allow optimizations applied to for loops for common types like lists to also be applied to yield from loops and allow better specialization of SEND improving JIT coverage.

To merge the two instructions, SEND will have to be modified to take an extra NULL input.

This is part of #145047

Linked PRs

• GH-145667: Merge GET_ITER and GET_YIELD_FROM_ITER #146120