Change get_n_checked_pairs() to get_n_unchecked_pairs().

[r22815]

diff --git a/ir/be/belower.c b/ir/be/belower.c
index 2c18953..53655e7 100644 (file)
--- a/ir/be/belower.c
+++ b/ir/be/belower.c
@@ -98,15 +98,17 @@ typedef struct _perm_cycle_t {
 } perm_cycle_t;
 
 /** returns the number register pairs marked as checked. */
-static int get_n_checked_pairs(reg_pair_t *pairs, int n) {
-       int i, n_checked = 0;
+static int get_n_unchecked_pairs(reg_pair_t const *const pairs, int const n)
+{
+       int n_unchecked = 0;
+       int i;
 
        for (i = 0; i < n; i++) {
-               if (pairs[i].checked)
-                       n_checked++;
+               if (!pairs[i].checked)
+                       n_unchecked++;
        }
 
-       return n_checked;
+       return n_unchecked;
 }
 
 /**
@@ -213,7 +215,7 @@ static void get_perm_cycle(perm_cycle_t *const cycle,
 {
        int         head         = pairs[start].in_reg->index;
        int         cur_idx      = pairs[start].out_reg->index;
-       int   const n_pairs_done = get_n_checked_pairs(pairs, n);
+       int   const n_pairs_todo = get_n_unchecked_pairs(pairs, n);
        perm_type_t cycle_tp     = PERM_CYCLE;
        int         idx;
 
@@ -232,7 +234,7 @@ static void get_perm_cycle(perm_cycle_t *const cycle,
        }
 
        /* assume worst case: all remaining pairs build a cycle or chain */
-       cycle->elems    = XMALLOCNZ(const arch_register_t*, (n - n_pairs_done) * 2);
+       cycle->elems    = XMALLOCNZ(const arch_register_t*, n_pairs_todo * 2);
        cycle->n_elems  = 2;  /* initial number of elements is 2 */
        cycle->elems[0] = pairs[start].in_reg;
        cycle->elems[1] = pairs[start].out_reg;
@@ -344,7 +346,7 @@ static void lower_perm_node(ir_node *irn, lower_env_t *env)
        }
 
        /* check for cycles and chains */
-       while (get_n_checked_pairs(pairs, n) < n) {
+       while (get_n_unchecked_pairs(pairs, n) > 0) {
                perm_cycle_t cycle;
                int          j;