diff options
| -rw-r--r-- | src/glsl/opt_constant_propagation.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/glsl/opt_constant_propagation.cpp b/src/glsl/opt_constant_propagation.cpp index 90cc0c89b65..10be8e800ff 100644 --- a/src/glsl/opt_constant_propagation.cpp +++ b/src/glsl/opt_constant_propagation.cpp @@ -444,6 +444,14 @@ ir_constant_propagation_visitor::add_constant(ir_assignment *ir) if (!deref->var->type->is_vector() && !deref->var->type->is_scalar()) return; + /* We can't do copy propagation on buffer variables, since the underlying + * memory storage is shared across multiple threads we can't be sure that + * the variable value isn't modified between this assignment and the next + * instruction where its value is read. + */ + if (deref->var->data.mode == ir_var_shader_storage) + return; + entry = new(this->mem_ctx) acp_entry(deref->var, ir->write_mask, constant); this->acp->push_tail(entry); } |