diff options
| -rw-r--r-- | src/compiler/glsl/opt_rebalance_tree.cpp | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/compiler/glsl/opt_rebalance_tree.cpp b/src/compiler/glsl/opt_rebalance_tree.cpp index 095f2d7d2f0..8045d51033d 100644 --- a/src/compiler/glsl/opt_rebalance_tree.cpp +++ b/src/compiler/glsl/opt_rebalance_tree.cpp @@ -131,6 +131,8 @@ public: progress = false; } + virtual ir_visitor_status visit_enter(ir_assignment *ir); + void handle_rvalue(ir_rvalue **rvalue); bool progress; @@ -146,6 +148,20 @@ struct is_reduction_data { } /* anonymous namespace */ +ir_visitor_status +ir_rebalance_visitor::visit_enter(ir_assignment *ir) +{ + ir_variable *var = ir->lhs->variable_referenced(); + if (var->data.invariant || var->data.precise) { + /* If we're assigning to an invariant variable, just bail. Tree + * rebalancing (reassociation) isn't precision-safe. + */ + return visit_continue_with_parent; + } else { + return visit_continue; + } +} + static bool is_reduction_operation(ir_expression_operation operation) { |