Mesa (master): radv: call nir_lower_io_to_temporaries for VS, GS, TES and FS
Samuel Pitoiset
hakzsam at kemper.freedesktop.org
Thu May 24 07:19:29 UTC 2018
Module: Mesa
Branch: master
Commit: 38a8c5903be787b203ec6586e6ce5f9cc8a5a6cf
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=38a8c5903be787b203ec6586e6ce5f9cc8a5a6cf
Author: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Date: Wed May 23 14:31:56 2018 +0200
radv: call nir_lower_io_to_temporaries for VS, GS, TES and FS
Do not lower FS inputs because this moves all load_var
instructions at beginning of shaders and because
interp_var_at_sample (and friends) seem broken. That might
be eventually enabled later on if we really want to preload
all FS inputs at beginning.
Polaris10:
Totals from affected shaders:
SGPRS: 54072 -> 54264 (0.36 %)
VGPRS: 38580 -> 38124 (-1.18 %)
Spilled SGPRs: 652 -> 652 (0.00 %)
Spilled VGPRs: 0 -> 0 (0.00 %)
Code Size: 2128116 -> 2127380 (-0.03 %) bytes
Max Waves: 8048 -> 8086 (0.47 %)
Vega10:
Totals from affected shaders:
SGPRS: 52616 -> 52656 (0.08 %)
VGPRS: 37536 -> 37116 (-1.12 %)
Spilled SGPRs: 828 -> 828 (0.00 %)
Code Size: 2043756 -> 2042672 (-0.05 %) bytes
Max Waves: 9176 -> 9254 (0.85 %)
Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>
---
src/amd/vulkan/radv_shader.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/src/amd/vulkan/radv_shader.c b/src/amd/vulkan/radv_shader.c
index 7ed5d2a421..84ad215ccb 100644
--- a/src/amd/vulkan/radv_shader.c
+++ b/src/amd/vulkan/radv_shader.c
@@ -278,6 +278,16 @@ radv_shader_compile_to_nir(struct radv_device *device,
nir_lower_vars_to_ssa(nir);
+ if (nir->info.stage == MESA_SHADER_VERTEX ||
+ nir->info.stage == MESA_SHADER_GEOMETRY) {
+ NIR_PASS_V(nir, nir_lower_io_to_temporaries,
+ nir_shader_get_entrypoint(nir), true, true);
+ } else if (nir->info.stage == MESA_SHADER_TESS_EVAL||
+ nir->info.stage == MESA_SHADER_FRAGMENT) {
+ NIR_PASS_V(nir, nir_lower_io_to_temporaries,
+ nir_shader_get_entrypoint(nir), true, false);
+ }
+
nir_split_var_copies(nir);
nir_lower_var_copies(nir);
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