diff options
Diffstat (limited to 'src/glsl')
| -rw-r--r-- | src/glsl/loop_unroll.cpp | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/glsl/loop_unroll.cpp b/src/glsl/loop_unroll.cpp index 5b84e101477..d0bcaa6703d 100644 --- a/src/glsl/loop_unroll.cpp +++ b/src/glsl/loop_unroll.cpp @@ -56,6 +56,7 @@ loop_unroll_visitor::visit_leave(ir_loop *ir) { loop_variable_state *const ls = this->state->get(ir); int iterations; + unsigned ir_count; /* If we've entered a loop that hasn't been analyzed, something really, * really bad has happened. @@ -78,6 +79,20 @@ loop_unroll_visitor::visit_leave(ir_loop *ir) if (iterations > (int) max_iterations) return visit_continue; + /* Don't try to unroll nested loops and loops with a huge body. + */ + ir_count = 0; + foreach_list(node, &ir->body_instructions) { + ++ir_count; + + /* If the loop body gets to huge, do not unroll. */ + if (5*max_iterations < ir_count*iterations) + return visit_continue; + /* Do not unroll loops with child loop nodes. */ + if (((ir_instruction *) node)->as_loop()) + return visit_continue; + } + if (ls->num_loop_jumps > 1) return visit_continue; else if (ls->num_loop_jumps) { |