Now, a single output vec4 can be referenced by multiple ir_variables
(gl_Fragcolor_x, gl_FragColor_y, etc.). This gives a couple of chances
for tree grafting to work.
total instructions in shared programs: 1644020 -> 1643948 (-0.00%)
instructions in affected programs: 7446 -> 7374 (-0.97%)
GAINED: 0
LOST: 0
---
src/mesa/drivers/dri/i965/brw_fs_vector_splitting.cpp | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_fs_vector_splitting.cpp
b/src/mesa/drivers/dri/i965/brw_fs_vector_splitting.cpp
index a9125ca..bf940c4 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_vector_splitting.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_vector_splitting.cpp
@@ -107,7 +107,6 @@ ir_vector_reference_visitor::get_variable_entry(ir_variable
*var)
switch (var->data.mode) {
case ir_var_uniform:
case ir_var_shader_in:
- case ir_var_shader_out:
case ir_var_system_value:
case ir_var_function_in:
case ir_var_function_out:
@@ -372,8 +371,19 @@ brw_do_vector_splitting(exec_list *instructions)
entry->var->name,
"xyzw"[i]);
- entry->components[i] = new(entry->mem_ctx) ir_variable(type, name,
-
ir_var_temporary);
+ ir_variable *new_var;
+
+ if (entry->var->data.mode == ir_var_shader_out) {
+ new_var = entry->var->clone(entry->mem_ctx, NULL);
+ new_var->type = type;
+ new_var->name = ralloc_strdup(new_var, name);
+ new_var->data.location_frac = i;
+ } else {
+ new_var = new(entry->mem_ctx) ir_variable(type, name,
+ ir_var_temporary);
+ }
+
+ entry->components[i] = new_var;
entry->var->insert_before(entry->components[i]);
}
--
1.9.0
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