This takes the same callback as nir_foreach_src except it walks all phi
sources which leave a given block.
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5094>
Sources of phi instructions act as if they occur at the very end of the
predecessor block not the block in which the phi lives. In order to
handle them correctly, we have to skip phi sources on the normal
instruction walk and handle them as a separate walk over the successor
phis. While registers in phi instructions is a bit of an oddity it can
happen when we temporarily go out-of-SSA for control-flow manipulations.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111075
Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
We have a pass to lower global registers to locals and many drivers
dutifully call it. However, no one ever creates a global register ever
so it's all dead code. It's time we bury it.
Acked-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
All we ever do is initialize it to zero, clone it, print it, and
validate it. No one ever sets or uses it.
Acked-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Jason Ekstrand
Timothy Arceri
Matt Turner
Jason Ekstrand