From: Eric Anholt <eric@anholt.net>
Date: Mon, 22 Aug 2011 18:48:04 +0000 (-0700)
Subject: i965/vs: Don't lower uniform array indexing.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ddca4592a7fa08cc294403d221a5f329ee4991e9;p=mesa.git

i965/vs: Don't lower uniform array indexing.

This avoids the massive conditional move array access, and brings code
generation quality for the new VS backend into the realm of efficiency
of the old backend (roughly 20% more instructions generated than
before across shader-db, instead of assertion failing for generating
over 10,000 instructions on many shaders!).

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
---

diff --git a/src/mesa/drivers/dri/i965/brw_shader.cpp b/src/mesa/drivers/dri/i965/brw_shader.cpp
index 597c4cdf71d..0a21094708b 100644
--- a/src/mesa/drivers/dri/i965/brw_shader.cpp
+++ b/src/mesa/drivers/dri/i965/brw_shader.cpp
@@ -119,7 +119,7 @@ brw_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)
       bool input = true;
       bool output = stage == MESA_SHADER_FRAGMENT;
       bool temp = stage == MESA_SHADER_FRAGMENT;
-      bool uniform = true;
+      bool uniform = stage == MESA_SHADER_FRAGMENT;
 
       lower_variable_index_to_cond_assign(shader->ir,
 					  input, output, temp, uniform);