diff options
Diffstat (limited to 'src/glsl/loop_analysis.h')
| -rw-r--r-- | src/glsl/loop_analysis.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/glsl/loop_analysis.h b/src/glsl/loop_analysis.h index 8e57dacbf6b..0208890b1fd 100644 --- a/src/glsl/loop_analysis.h +++ b/src/glsl/loop_analysis.h @@ -58,6 +58,13 @@ set_loop_controls(exec_list *instructions, loop_state *ls); extern bool unroll_loops(exec_list *instructions, loop_state *ls, unsigned max_iterations); +ir_rvalue * +find_initial_value(ir_loop *loop, ir_variable *var); + +int +calculate_iterations(ir_rvalue *from, ir_rvalue *to, ir_rvalue *increment, + enum ir_expression_operation op); + /** * Tracking for all variables used in a loop @@ -99,6 +106,14 @@ public: exec_list terminators; /** + * If any of the terminators in \c terminators leads to termination of the + * loop after a constant number of iterations, this is the terminator that + * leads to termination after the smallest number of iterations. Otherwise + * NULL. + */ + loop_terminator *limiting_terminator; + + /** * Hash table containing all variables accessed in this loop */ hash_table *var_hash; @@ -129,6 +144,7 @@ public: this->contains_calls = false; this->var_hash = hash_table_ctor(0, hash_table_pointer_hash, hash_table_pointer_compare); + this->limiting_terminator = NULL; } ~loop_variable_state() @@ -227,7 +243,21 @@ public: class loop_terminator : public exec_node { public: + loop_terminator() + : ir(NULL), iterations(-1) + { + } + + /** + * Statement which terminates the loop. + */ ir_if *ir; + + /** + * The number of iterations after which the terminator is known to + * terminate the loop (if that is a fixed value). Otherwise -1. + */ + int iterations; }; |