broadcom/compiler: Add a constant folding pass after nir_lower_io
The nir_lower_io pass produces a bunch of constant arithmetic, and
assumes that constant folding will simplify it away.
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6356>
diff --git a/src/broadcom/compiler/vir.c b/src/broadcom/compiler/vir.c
index d81931e..d06f789 100644
--- a/src/broadcom/compiler/vir.c
+++ b/src/broadcom/compiler/vir.c
@@ -821,8 +821,11 @@
NIR_PASS_V(c->s, nir_lower_io, nir_var_shader_in | nir_var_shader_out,
type_size_vec4,
(nir_lower_io_options)0);
- /* clean up nir_lower_io's deref_var remains */
+ /* clean up nir_lower_io's deref_var remains and do a constant folding pass
+ * on the code it generated.
+ */
NIR_PASS_V(c->s, nir_opt_dce);
+ NIR_PASS_V(c->s, nir_opt_constant_folding);
}
static void
