Test case for historical reasons

[libfirm] / ir / be / beloopana.c

diff --git a/ir/be/beloopana.c b/ir/be/beloopana.c
index c62e5ef..eb00490 100644 (file)
--- a/ir/be/beloopana.c
+++ b/ir/be/beloopana.c
@@ -72,7 +72,9 @@ static int cmp_loop_info(const void *a, const void *b, size_t size) {
  * @param cls       The register class to compute pressure for.
  * @return The highest register pressure in the given block.
  */
-static unsigned be_compute_block_pressure(be_loopana_t *loop_ana, ir_node *block, const arch_register_class_t *cls) {
+static unsigned be_compute_block_pressure(be_loopana_t *loop_ana,
+               ir_node *block, const arch_register_class_t *cls)
+{
        const be_irg_t   *birg       = loop_ana->birg;
        const arch_env_t *aenv       = be_get_birg_arch_env(birg);
        be_lv_t          *lv         = be_get_birg_liveness(birg);
@@ -184,7 +186,9 @@ be_loopana_t *be_new_loop_pressure_cls(be_irg_t *birg,
  * @param birg  The backend irg object
  * @return The loop analysis object.
  */
-be_loopana_t *be_new_loop_pressure(be_irg_t *birg) {
+be_loopana_t *be_new_loop_pressure(be_irg_t *birg,
+                                   const arch_register_class_t *cls)
+{
        ir_graph         *irg      = be_get_birg_irg(birg);
        be_loopana_t     *loop_ana = xmalloc(sizeof(*loop_ana));
        ir_loop          *irg_loop = get_irg_loop(irg);
@@ -199,12 +203,16 @@ be_loopana_t *be_new_loop_pressure(be_irg_t *birg) {
                construct_cf_backedges(irg);
        }
 
-       for (i = arch_env_get_n_reg_class(arch_env) - 1; i >= 0; --i) {
-               const arch_register_class_t *cls = arch_env_get_reg_class(arch_env, i);
-               DBG((dbg, LEVEL_1, "\n=====================================================\n", cls->name));
-               DBG((dbg, LEVEL_1, " Computing register pressure for class %s:\n", cls->name));
-               DBG((dbg, LEVEL_1, "=====================================================\n", cls->name));
+       if (cls != NULL) {
                be_compute_loop_pressure(loop_ana, irg_loop, cls);
+       } else {
+               for (i = arch_env_get_n_reg_class(arch_env) - 1; i >= 0; --i) {
+                       const arch_register_class_t *cls = arch_env_get_reg_class(arch_env, i);
+                       DBG((dbg, LEVEL_1, "\n=====================================================\n", cls->name));
+                       DBG((dbg, LEVEL_1, " Computing register pressure for class %s:\n", cls->name));
+                       DBG((dbg, LEVEL_1, "=====================================================\n", cls->name));
+                       be_compute_loop_pressure(loop_ana, irg_loop, cls);
+               }
        }
 
        return loop_ana;