---
src/glsl/ir_optimization.h | 2 +-
src/glsl/linker.cpp | 6 +++---
src/glsl/opt_dead_builtin_varyings.cpp | 27 +++++++++++++++++++--------
3 files changed, 23 insertions(+), 12 deletions(-)
diff --git a/src/glsl/ir_optimization.h b/src/glsl/ir_optimization.h
index a61227b..b79c2b7 100644
--- a/src/glsl/ir_optimization.h
+++ b/src/glsl/ir_optimization.h
@@ -77,7 +77,7 @@ bool do_copy_propagation(exec_list *instructions);
bool do_copy_propagation_elements(exec_list *instructions);
bool do_constant_propagation(exec_list *instructions);
void do_dead_builtin_varyings(struct gl_context *ctx,
- exec_list *producer, exec_list *consumer,
+ gl_shader *producer, gl_shader *consumer,
unsigned num_tfeedback_decls,
class tfeedback_decl *tfeedback_decls);
bool do_dead_code(exec_list *instructions, bool uniform_locations_assigned);
diff --git a/src/glsl/linker.cpp b/src/glsl/linker.cpp
index d36f627..f87ae0e 100644
--- a/src/glsl/linker.cpp
+++ b/src/glsl/linker.cpp
@@ -2091,7 +2091,7 @@ link_shaders(struct gl_context *ctx, struct
gl_shader_program *prog)
goto done;
}
- do_dead_builtin_varyings(ctx, sh->ir, NULL,
+ do_dead_builtin_varyings(ctx, sh, NULL,
num_tfeedback_decls, tfeedback_decls);
demote_shader_inputs_and_outputs(sh, ir_var_shader_out);
@@ -2106,7 +2106,7 @@ link_shaders(struct gl_context *ctx, struct
gl_shader_program *prog)
*/
gl_shader *const sh = prog->_LinkedShaders[first];
- do_dead_builtin_varyings(ctx, NULL, sh->ir,
+ do_dead_builtin_varyings(ctx, NULL, sh,
num_tfeedback_decls, tfeedback_decls);
demote_shader_inputs_and_outputs(sh, ir_var_shader_in);
@@ -2130,7 +2130,7 @@ link_shaders(struct gl_context *ctx, struct
gl_shader_program *prog)
tfeedback_decls, gs_input_vertices))
goto done;
- do_dead_builtin_varyings(ctx, sh_i->ir, sh_next->ir,
+ do_dead_builtin_varyings(ctx, sh_i, sh_next,
next == MESA_SHADER_FRAGMENT ? num_tfeedback_decls : 0,
tfeedback_decls);
diff --git a/src/glsl/opt_dead_builtin_varyings.cpp
b/src/glsl/opt_dead_builtin_varyings.cpp
index 2e813d2..6745d5c 100644
--- a/src/glsl/opt_dead_builtin_varyings.cpp
+++ b/src/glsl/opt_dead_builtin_varyings.cpp
@@ -409,7 +409,7 @@ lower_texcoord_array(exec_list *ir, const
varying_info_visitor *info)
void
do_dead_builtin_varyings(struct gl_context *ctx,
- exec_list *producer, exec_list *consumer,
+ gl_shader *producer, gl_shader *consumer,
unsigned num_tfeedback_decls,
tfeedback_decl *tfeedback_decls)
{
@@ -431,44 +431,55 @@ do_dead_builtin_varyings(struct gl_context *ctx,
varying_info_visitor consumer_info(ir_var_shader_in);
if (producer) {
- producer_info.get(producer, num_tfeedback_decls, tfeedback_decls);
+ producer_info.get(producer->ir, num_tfeedback_decls, tfeedback_decls);
if (!consumer) {
/* At least eliminate unused gl_TexCoord elements. */
if (producer_info.lower_texcoord_array) {
- lower_texcoord_array(producer, &producer_info);
+ lower_texcoord_array(producer->ir, &producer_info);
}
return;
}
}
if (consumer) {
- consumer_info.get(consumer, 0, NULL);
+ consumer_info.get(consumer->ir, 0, NULL);
if (!producer) {
/* At least eliminate unused gl_TexCoord elements. */
if (consumer_info.lower_texcoord_array) {
- lower_texcoord_array(consumer, &consumer_info);
+ lower_texcoord_array(consumer->ir, &consumer_info);
}
return;
}
}
- /* Eliminate the varyings unused by the other shader. */
+ /* Eliminate the outputs unused by the consumer. */
if (producer_info.lower_texcoord_array ||
producer_info.color_usage ||
producer_info.has_fog) {
- replace_varyings_visitor(producer,
+ replace_varyings_visitor(producer->ir,
&producer_info,
consumer_info.texcoord_usage,
consumer_info.color_usage,
consumer_info.has_fog);
}
+ /* The gl_TexCoord fragment shader inputs can be initialized
+ * by GL_COORD_REPLACE, so we can't eliminate them.
+ *
+ * This doesn't prevent elimination of the gl_TexCoord elements which
+ * are not read by the fragment shader. We want to eliminate those anyway.
+ */
+ if (consumer->Type == GL_FRAGMENT_SHADER) {
+ producer_info.texcoord_usage = (1 << MAX_TEXTURE_COORD_UNITS) - 1;
+ }
+
+ /* Eliminate the inputs uninitialized by the producer. */
if (consumer_info.lower_texcoord_array ||
consumer_info.color_usage ||
consumer_info.has_fog) {
- replace_varyings_visitor(consumer,
+ replace_varyings_visitor(consumer->ir,
&consumer_info,
producer_info.texcoord_usage,
producer_info.color_usage,
