When building the CFG the instructions are taken of the list in
fs_visitor and added to the lists inside each block. The single
"exec_node" in the instruction is used for those memberships.
In the case the pass rebuilt the CFG, it had no instructions, so
calculate_cfg() had nothing to work with. For now fix the bug by
pulling all the instructions back to the original list.
We can do better here, but punting until upcoming work on
CFG itself.
Issue found in an unpublished CTS test. Small reproduction in our
unit tests now enabled.
Fixes: 65237f8bbc ("intel/fs: Don't add MOV instructions to DO blocks in combine constants")
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27131>
Add a simple test to kick off the infrastructure. And also a test
(for now disabled) that fails because the code is returning an
empty shader. Next patch will fix and enable it.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27131>
