Revert "intel/nir: Call nir_lower_io_to_scalar_early"

Commit 4434591bf56a6b0 caused substantially more URB messages in
geometry and tessellation shaders.  Before we can really enable this
sort of optimization,  We either need some way of combining them back
together into vectors or we need to do cross-stage vector element
elimination without splitting everything into scalars.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107510
Fixes: 4434591bf56a6 "intel/nir: Call nir_lower_io_to_scalar_early"
Acked-by: Kenneth Graunke <kenneth@whitecape.org>
Tested-by: Mark Janes <mark.a.janes@intel.com>

diff --git a/src/intel/compiler/brw_nir.c b/src/intel/compiler/brw_nir.c
index 31ffbe613ecd3632aa153a630edb8b7583ae410a..29ad68fdb2a47460652ab00935ebd710e0e9063c 100644 (file)
--- a/src/intel/compiler/brw_nir.c
+++ b/src/intel/compiler/brw_nir.c
@@ -713,18 +713,6 @@ brw_nir_link_shaders(const struct brw_compiler *compiler,
    nir_validate_shader(*producer);
    nir_validate_shader(*consumer);
 
-   const bool p_is_scalar =
-      compiler->scalar_stage[(*producer)->info.stage];
-   const bool c_is_scalar =
-      compiler->scalar_stage[(*consumer)->info.stage];
-
-   if (p_is_scalar && c_is_scalar) {
-      NIR_PASS_V(*producer, nir_lower_io_to_scalar_early, nir_var_shader_out);
-      NIR_PASS_V(*consumer, nir_lower_io_to_scalar_early, nir_var_shader_in);
-      *producer = brw_nir_optimize(*producer, compiler, p_is_scalar);
-      *consumer = brw_nir_optimize(*consumer, compiler, c_is_scalar);
-   }
-
    NIR_PASS_V(*producer, nir_remove_dead_variables, nir_var_shader_out);
    NIR_PASS_V(*consumer, nir_remove_dead_variables, nir_var_shader_in);
 
@@ -741,7 +729,12 @@ brw_nir_link_shaders(const struct brw_compiler *compiler,
       NIR_PASS_V(*consumer, nir_lower_indirect_derefs,
                  brw_nir_no_indirect_mask(compiler, (*consumer)->info.stage));
 
+      const bool p_is_scalar =
+         compiler->scalar_stage[(*producer)->info.stage];
       *producer = brw_nir_optimize(*producer, compiler, p_is_scalar);
+
+      const bool c_is_scalar =
+         compiler->scalar_stage[(*consumer)->info.stage];
       *consumer = brw_nir_optimize(*consumer, compiler, c_is_scalar);
    }
 }