3 commits

Author	SHA1	Message	Date
Rhys Perry	ec2185c598	aco: keep track of temporaries' regclasses in the Program ... A future change will switch the liveness sets to bit vectors, which don't contain regclass information. Signed-off-by: Rhys Perry <pendingchaos02@gmail.com> Reviewed-by: Daniel Schürmann <daniel@schuermann.dev> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6733>	2020-09-21 13:47:28 +00:00
Daniel Schürmann	d098024c40	aco: rework lower_to_cssa() ... This patch changes lower_to_cssa to be much more conservative about assumptions which phi operands might interfere. Previously, this pass wasn't exhaustive and could miss some corner cases. v2: remove optimizations to find better insertion points as it's hard to guarantee that they are always correct and have overall no benefit. Fixes: 0b8216b2cd ('aco: Lower to CSSA') Reviewed-by: Rhys Perry <pendingchaos02@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3385>	2020-01-16 16:01:59 +01:00
Daniel Schürmann	0b8216b2cd	aco: Lower to CSSA ... Converting to 'Conventional SSA Form' ensures correctness w.r.t. spilling of phi nodes. Previously, it was possible that phi operands have intersecting live-ranges, and thus, couldn't get spilled to the same spilling slot. For this reason, ACO tried to avoid to spill phis, even if it was beneficial. This patch implements a conversion pass which is currently only called if spilling is necessary. Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>	2019-10-30 19:48:32 +00:00