nir/opt_varyings: reduce stack usage
What does this MR do and why?
nir/opt_varyings: reduce stack usage
Avoid put a huge struct on stack to fix a stack overflow on musl libc.
- Closes: #10988 (closed)
- Fixes: commit c66967b5 (nir: add nir_opt_varyings, new pass optimizing and compacting varyings)
Edited by Natanael Copa