From: Nicolai Hähnle <nicolai.haeh...@amd.com>
This whole pass is a no-op.
---
src/compiler/glsl/lower_output_reads.cpp | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/src/compiler/glsl/lower_output_reads.cpp
b/src/compiler/glsl/lower_output_reads.cpp
index 8a375ac..b0045f0 100644
--- a/src/compiler/glsl/lower_output_reads.cpp
+++ b/src/compiler/glsl/lower_output_reads.cpp
@@ -89,22 +89,20 @@ output_read_remover::~output_read_remover()
{
_mesa_hash_table_destroy(replacements, NULL);
ralloc_free(mem_ctx);
}
ir_visitor_status
output_read_remover::visit(ir_dereference_variable *ir)
{
if (ir->var->data.mode != ir_var_shader_out)
return visit_continue;
- if (stage == MESA_SHADER_TESS_CTRL)
- return visit_continue;
hash_entry *entry = _mesa_hash_table_search(replacements, ir->var);
ir_variable *temp = entry ? (ir_variable *) entry->data : NULL;
/* If we don't have an existing temporary, create one. */
if (temp == NULL) {
void *var_ctx = ralloc_parent(ir->var);
temp = new(var_ctx) ir_variable(ir->var->type, ir->var->name,
ir_var_temporary);
_mesa_hash_table_insert(replacements, ir->var, temp);
@@ -166,13 +164,19 @@ output_read_remover::visit_leave(ir_function_signature
*sig)
if (strcmp(sig->function_name(), "main") != 0)
return visit_continue;
hash_table_call_foreach(replacements, emit_main_copy, sig);
return visit_continue;
}
void
lower_output_reads(unsigned stage, exec_list *instructions)
{
+ /* Due to the possible interactions between multiple tessellation control
+ * shader invocations, we leave output variables as-is.
+ */
+ if (stage == MESA_SHADER_TESS_CTRL)
+ return;
+
output_read_remover v(stage);
visit_list_elements(&v, instructions);
}
--
2.7.4
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