- BugFix of the last fix ...

[libfirm] / ir / ir / irmode.c

diff --git a/ir/ir/irmode.c b/ir/ir/irmode.c
index b441d57..628ed42 100644 (file)
--- a/ir/ir/irmode.c
+++ b/ir/ir/irmode.c
@@ -45,30 +45,22 @@
 # include "irtools.h"
 # include "array.h"
 
-/* * *
- * local values
- * * */
-
-
-/** dynamic array to hold all modes */
+/** Obstack to hold all modes. */
 static struct obstack modes;
 
-/** number of defined modes */
+/** Number of defined modes. */
 static int num_modes = 0;
 
+/** The list of all currently existing modes. */
 static ir_mode **mode_list;
 
-/* * *
- * local functions
- * * */
-
 /**
  * Compare modes that don't need to have their code field
  * correctly set
  *
  * TODO: Add other fields
  **/
-INLINE static int modes_are_equal(const ir_mode *m, const ir_mode *n) {
+static INLINE int modes_are_equal(const ir_mode *m, const ir_mode *n) {
        if (m == n) return 1;
        if (m->sort         == n->sort &&
                m->arithmetic   == n->arithmetic &&
@@ -87,17 +79,34 @@ INLINE static int modes_are_equal(const ir_mode *m, const ir_mode *n) {
  * none found
  */
 static ir_mode *find_mode(const ir_mode *m) {
-       unsigned len = ARR_LEN(mode_list);
-       unsigned i;
-
-       for(i = 0; i < len; ++i) {
+       int i;
+       for (i = ARR_LEN(mode_list) - 1; i >= 0; --i) {
                ir_mode *n = mode_list[i];
                if (modes_are_equal(n, m))
                        return n;
        }
+       return NULL;
+}
+
+#ifdef FIRM_STATISTICS
+/* return the mode index, only needed for statistics */
+int stat_find_mode_index(const ir_mode *m) {
+       int i;
+       for (i = ARR_LEN(mode_list) - 1; i >= 0; --i) {
+               ir_mode *n = mode_list[i];
+               if (modes_are_equal(n, m))
+                       return i;
+       }
+       return -1;
+}
 
+/* return the mode for a given index, only needed for statistics */
+ir_mode *stat_mode_for_index(int idx) {
+       if (0 <= idx  && idx < ARR_LEN(mode_list))
+               return mode_list[idx];
        return NULL;
 }
+#endif
 
 /**
  * sets special values of modes