panfrost: Remove unneeded phi nodes

Add a pass to remove unneeded phi nodes as done in other drivers.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3294>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3294>

diff --git a/src/panfrost/midgard/midgard_compile.c b/src/panfrost/midgard/midgard_compile.c
index 2dd58b714f834993b2e35350039fcd656788f25d..56a1138197a0ca5de8f99da321fd9d55d1481299 100644 (file)
--- a/src/panfrost/midgard/midgard_compile.c
+++ b/src/panfrost/midgard/midgard_compile.c
@@ -487,6 +487,7 @@ optimise_nir(nir_shader *nir, unsigned quirks)
                 NIR_PASS(progress, nir, nir_lower_vars_to_ssa);
 
                 NIR_PASS(progress, nir, nir_copy_prop);
+                NIR_PASS(progress, nir, nir_opt_remove_phis);
                 NIR_PASS(progress, nir, nir_opt_dce);
                 NIR_PASS(progress, nir, nir_opt_dead_cf);
                 NIR_PASS(progress, nir, nir_opt_cse);