Since the backing storage for these is shared we cannot ensure that the
value won't change by writes from other threads.
---
src/glsl/opt_constant_variable.cpp | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/src/glsl/opt_constant_variable.cpp
b/src/glsl/opt_constant_variable.cpp
index 7222eb9..ab78e4c 100644
--- a/src/glsl/opt_constant_variable.cpp
+++ b/src/glsl/opt_constant_variable.cpp
@@ -115,6 +115,13 @@ ir_constant_variable_visitor::visit_enter(ir_assignment
*ir)
if (!var)
return visit_continue;
+ /* Ignore buffer variables, since the underlying storage is shared
+ * and we can't be sure that this variable won't be written by another
+ * thread.
+ */
+ if (var->data.mode == ir_var_buffer)
+ return visit_continue;
+
constval = ir->rhs->constant_expression_value();
if (!constval)
return visit_continue;
--
1.9.1
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