some more debug output if no definition for a value is found on a path

[libfirm] / ir / be / beirgmod.c

diff --git a/ir/be/beirgmod.c b/ir/be/beirgmod.c
index 9992afa..50d65bd 100644 (file)
--- a/ir/be/beirgmod.c
+++ b/ir/be/beirgmod.c
@@ -243,10 +243,12 @@ static ir_node *search_def(ir_node *usage, int pos, pset *copies, pset *copy_blo
         * predecessor block of the usage.
         */
        while(curr_bl != NULL) {
+               ir_node *phim;
 
            /*
                 * If this block contains a copy, search the block
-                * instruction by instruction.
+                * instruction by instruction. If nothing is found
+                * search for a not scheduled PhiM.
                 */
                if(pset_find_ptr(copy_blocks, curr_bl)) {
                        ir_node *irn;
@@ -258,6 +260,16 @@ static ir_node *search_def(ir_node *usage, int pos, pset *copies, pset *copy_blo
                                if(pset_find_ptr(copies, irn))
                                        return irn;
                        }
+
+                       for(phim = pset_first(copies); phim; phim = pset_next(copies)) {
+                               if(!is_Phi(phim) || !(get_irn_mode(phim) == mode_M))
+                                       continue;
+
+                               if(get_nodes_block(phim) == curr_bl) {
+                                       pset_break(copies);
+                                       return phim;
+                               }
+                       }
                }
 
                if(pset_find_ptr(phi_blocks, curr_bl)) {
@@ -280,6 +292,16 @@ static ir_node *search_def(ir_node *usage, int pos, pset *copies, pset *copy_blo
 
                                for(i = 0; i < n_preds; ++i) {
                                        ir_node *arg = search_def(phi, i, copies, copy_blocks, phis, phi_blocks, mode);
+                                       if(arg == NULL) {
+                                               ir_node *irn;
+
+                                               ir_fprintf(stderr, "no definition found for %+F at position %d\nCopies: ", phi, i);
+                                               for(irn = pset_first(copies); irn; irn = pset_next(copies)) {
+                                                       ir_fprintf(stderr, "%+F ", irn);
+                                               }
+                                               ir_fprintf(stderr, "\n\n");
+                                               assert(arg && "no definition found");
+                                       }
                                        DBG((dbg, LEVEL_2, "\t\t%+F(%d) -> %+F\n", phi, i, arg));
                                        set_irn_n(phi, i, arg);
                                }
@@ -347,8 +369,15 @@ static void fix_usages(pset *copies, pset *copy_blocks, pset *phi_blocks, pset *
                def = search_def(irn, pos, copies, copy_blocks, phis, phi_blocks, mode);
                DBG((dbg, LEVEL_2, "\t%+F(%d) -> %+F\n", irn, pos, def));
 
-               if(def != NULL)
-                       set_irn_n(irn, pos, def);
+               if(def == NULL) {
+                       ir_fprintf(stderr, "no definition found for %+F at position %d\nCopies: ", irn, pos);
+                       for(irn = pset_first(copies); irn; irn = pset_next(copies)) {
+                               ir_fprintf(stderr, "%+F ", irn);
+                       }
+                       ir_fprintf(stderr, "\n\n");
+                       assert(def && "no definition found");
+               }
+               set_irn_n(irn, pos, def);
        }
 
        obstack_free(&obst, NULL);
@@ -616,8 +645,6 @@ static void remove_empty_block(ir_node *block, void *data) {
        sched_foreach(block, node) {
                if(!is_Jmp(node))
                        return;
-               if(get_irn_n_edges(node) != 1)
-                       return;
                if(jump != NULL) {
                        // we should never have 2 jumps in a block
                        assert(0);
@@ -642,7 +669,6 @@ static void remove_empty_block(ir_node *block, void *data) {
        irg = get_irn_irg(block);
        set_irg_doms_inconsistent(irg);
        set_irg_extblk_inconsistent(irg);
-       set_irg_outs_inconsistent(irg);
 }
 
 /**