piglit gl-1.0-no-op-paths hangs Navi 14 since !20357
piglit's gl-1.0-no-op-paths
hangs my Navi 14. I bisected it to !20357 (merged). !20482 (merged) didn't fix it, but reverting both MRs does.
Specifically, it's the "Polygon Stipple set to fail mode" case which hangs. This case enables GL_POLYGON_STIPPLE
with an all-0s stipple pattern, so it discards all fragments.
Setting the environment variable AMD_DEBUG=mono
avoids the hang, so it's somehow specific to using separate prolog/epilog.