Mesa (master): r600/sfn: lower to scalar for some optimizations and vectortize later
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Mon Sep 28 18:23:24 UTC 2020
Module: Mesa
Branch: master
Commit: 972dd730d92e5f6ee31f4db03f602d74b1e72814
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=972dd730d92e5f6ee31f4db03f602d74b1e72814
Author: Gert Wollny <gert.wollny at collabora.com>
Date: Thu Sep 24 08:46:53 2020 +0200
r600/sfn: lower to scalar for some optimizations and vectortize later
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6879>
---
src/gallium/drivers/r600/sfn/sfn_nir.cpp | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/src/gallium/drivers/r600/sfn/sfn_nir.cpp b/src/gallium/drivers/r600/sfn/sfn_nir.cpp
index c30e82d4b40..0a19324b73e 100644
--- a/src/gallium/drivers/r600/sfn/sfn_nir.cpp
+++ b/src/gallium/drivers/r600/sfn/sfn_nir.cpp
@@ -699,7 +699,7 @@ r600_lower_shared_io(nir_shader *nir)
}
static bool
-optimize_once(nir_shader *shader)
+optimize_once(nir_shader *shader, bool vectorize)
{
bool progress = false;
NIR_PASS(progress, shader, nir_copy_prop);
@@ -707,7 +707,8 @@ optimize_once(nir_shader *shader)
NIR_PASS(progress, shader, nir_opt_algebraic);
NIR_PASS(progress, shader, nir_opt_constant_folding);
NIR_PASS(progress, shader, nir_opt_copy_prop_vars);
- NIR_PASS(progress, shader, nir_opt_vectorize, NULL, NULL);
+ if (vectorize)
+ NIR_PASS(progress, shader, nir_opt_vectorize, NULL, NULL);
NIR_PASS(progress, shader, nir_opt_remove_phis);
@@ -816,11 +817,9 @@ int r600_shader_from_nir(struct r600_context *rctx,
NIR_PASS_V(sel->nir, nir_lower_ubo_vec4);
- /* It seems the output of this optimization is cached somewhere, and
- * when there are registers, then we can no longer copy propagate, so
- * skip the optimization then. (There is probably a better way, but yeah)
- */
- while(optimize_once(sel->nir));
+ /* Lower to scalar to let some optimization work out better */
+ NIR_PASS_V(sel->nir, nir_lower_alu_to_scalar, NULL, NULL);
+ while(optimize_once(sel->nir, false));
NIR_PASS_V(sel->nir, nir_remove_dead_variables, nir_var_shader_in, NULL);
NIR_PASS_V(sel->nir, nir_remove_dead_variables, nir_var_shader_out, NULL);
@@ -831,7 +830,7 @@ int r600_shader_from_nir(struct r600_context *rctx,
40,
r600_get_natural_size_align_bytes);
- while (optimize_once(sel->nir));
+ while (optimize_once(sel->nir, true));
auto sh = nir_shader_clone(sel->nir, sel->nir);
NIR_PASS_V(sh, nir_opt_algebraic_late);
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