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st/mesa: disable copy propagation for tessellation shaders
author
Ilia Mirkin
<imirkin@alum.mit.edu>
Tue, 22 Jul 2014 00:45:29 +0000
(20:45 -0400)
committer
Marek Olšák
<marek.olsak@amd.com>
Wed, 22 Jul 2015 22:59:30 +0000
(
00:59
+0200)
This can't work due to shared inputs and outputs and barriers.
src/mesa/state_tracker/st_glsl_to_tgsi.cpp
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diff --git
a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index
221b675
..
ad319f0
100644
(file)
--- a/
src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/
src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@
-5800,7
+5800,11
@@
get_mesa_program(struct gl_context *ctx,
/* Perform optimizations on the instructions in the glsl_to_tgsi_visitor. */
v->simplify_cmp();
- v->copy_propagate();
+
+ if (shader->Type != GL_TESS_CONTROL_SHADER &&
+ shader->Type != GL_TESS_EVALUATION_SHADER)
+ v->copy_propagate();
+
while (v->eliminate_dead_code());
v->merge_two_dsts();