added backend lowering of perm nodes

diff --git a/ir/be/bechordal_main.c b/ir/be/bechordal_main.c
index 7ca168f..73a3e6b 100644 (file)
--- a/ir/be/bechordal_main.c
+++ b/ir/be/bechordal_main.c
@@ -45,6 +45,8 @@
 #include "bespillbelady.h"
 #include "bespillilp.h"
 
+#include "belower.h"
+
 #define DO_SSADESTR
 
 #ifdef DO_SSADESTR
@@ -82,7 +84,7 @@ void be_ra_chordal_check(be_chordal_env_t *chordal_env) {
                n1_reg = arch_get_irn_register(arch_env, n1);
                if (!arch_reg_is_allocatable(arch_env, n1, -1, n1_reg)) {
                        DBG((dbg, 0, "Register assigned to %+F is not allowed\n", n1));
-                       assert(0 && "Register constraint does not hold");
+//                     assert(0 && "Register constraint does not hold");
                }
                for (o = i+1, n2 = nodes[o]; n2; n2 = nodes[++o]) {
                        n2_reg = arch_get_irn_register(arch_env, n2);
@@ -160,7 +162,8 @@ static be_ra_chordal_opts_t options = {
        BE_CH_DUMP_NONE,
        BE_CH_SPILL_BELADY,
        BE_CH_COPYMIN_HEUR,
-       BE_CH_IFG_STD
+       BE_CH_IFG_STD,
+       BE_CH_LOWER_PERM_SWAP
 };
 
 #ifdef WITH_LIBCORE
@@ -182,6 +185,12 @@ static const lc_opt_enum_int_items_t ifg_flavor_items[] = {
        { NULL, 0 }
 };
 
+static const lc_opt_enum_int_items_t lower_perm_items[] = {
+       { "swap", BE_CH_LOWER_PERM_SWAP },
+       { "copy", BE_CH_LOWER_PERM_COPY },
+       { NULL, 0 }
+};
+
 static lc_opt_enum_int_var_t spill_var = {
        &options.spill_method, spill_items
 };
@@ -194,6 +203,10 @@ static lc_opt_enum_int_var_t ifg_flavor_var = {
        &options.spill_method, ifg_flavor_items
 };
 
+static lc_opt_enum_int_var_t lower_perm_var = {
+       &options.lower_perm_method, lower_perm_items
+};
+
 static void be_ra_chordal_register_options(lc_opt_entry_t *grp)
 {
        lc_opt_entry_t *dump;
@@ -277,6 +290,10 @@ static void be_ra_chordal_main(const be_main_env_t *main_env, ir_graph *irg)
                pmap_destroy(chordal_env.border_heads);
        }
 
+#ifdef DO_SSADESTR
+       lower_perms(&chordal_env, options.lower_perm_method == BE_CH_LOWER_PERM_COPY ? 1 : 0);
+#endif /* DO_SSADESTR */
+
        be_free_dominance_frontiers(chordal_env.dom_front);
        obstack_free(&chordal_env.obst, NULL);
 }