Switch irg index to type size_t, making the API more consistent.

[libfirm] / ir / opt / ircgopt.c

diff --git a/ir/opt/ircgopt.c b/ir/opt/ircgopt.c
index ef4baf2..c95e0a5 100644 (file)
--- a/ir/opt/ircgopt.c
+++ b/ir/opt/ircgopt.c
@@ -64,7 +64,7 @@ static void collect_call(ir_node *node, void *env)
 void gc_irgs(size_t n_keep, ir_entity ** keep_arr)
 {
        void * MARK = &MARK; /* @@@ gefaehrlich!!! Aber wir markieren hoechstens zu viele ... */
-       int i;
+       size_t i, n;
 
        FIRM_DBG_REGISTER(dbg, "firm.opt.cgopt");
 
@@ -86,8 +86,8 @@ void gc_irgs(size_t n_keep, ir_entity ** keep_arr)
                        DB((dbg, LEVEL_1, "  method %+F kept alive.\n", marked[idx]));
                }
 
-               for (i = 0; i < ARR_LEN(marked); ++i) {
-                       ir_graph *irg = get_entity_irg(marked[i]);
+               for (idx = 0; idx < ARR_LEN(marked); ++idx) {
+                       ir_graph *irg = get_entity_irg(marked[idx]);
                        ir_node *node;
 
                        if (irg == NULL)
@@ -102,11 +102,11 @@ void gc_irgs(size_t n_keep, ir_entity ** keep_arr)
                        /* iterate calls */
                        for (node = (ir_node*)get_irn_link(node); node != NULL;
                             node = (ir_node*)get_irn_link(node)) {
-                               int i;
+                               size_t i;
                                assert(is_Call(node));
 
-                               for (i = get_Call_n_callees(node) - 1; i >= 0; --i) {
-                                       ir_entity *ent = get_Call_callee(node, i);
+                               for (i = get_Call_n_callees(node); i > 0;) {
+                                       ir_entity *ent = get_Call_callee(node, --i);
 
                                        if (get_entity_irg(ent) && get_entity_link(ent) != MARK) {
                                                set_entity_link(ent, MARK);
@@ -123,7 +123,7 @@ void gc_irgs(size_t n_keep, ir_entity ** keep_arr)
        }
 
        /* clean */
-       for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
+       for (i = 0, n = get_irp_n_irgs(); i < n; ++i) {
                ir_graph  *irg = get_irp_irg(i);
                ir_entity *ent = get_irg_entity(irg);