[PATCH, committed] Correct signedness warning in gimple-ssa-strength-reduction.c

[Bill Schmidt]

This corrects a signed/unsigned comparison.  Regstrapped on
powerpc64-unknown-linux-gnu, committed as obvious.

Thanks,
Bill


2013-05-08  Bill Schmidt  <wschm...@linux.vnet.ibm.com>

        * gimple-ssa-strength-reduction.c (count_candidates): Change
        return value to int.
        (analyze_candidates_and_replace): Change type of length to int.


Index: gcc/gimple-ssa-strength-reduction.c
===================================================================
--- gcc/gimple-ssa-strength-reduction.c (revision 198713)
+++ gcc/gimple-ssa-strength-reduction.c (working copy)
@@ -2259,7 +2259,7 @@ replace_uncond_cands_and_profitable_phis (slsr_can
 /* Count the number of candidates in the tree rooted at C that have
    not already been replaced under other interpretations.  */
 
-static unsigned
+static int
 count_candidates (slsr_cand_t c)
 {
   unsigned count = cand_already_replaced (c) ? 0 : 1;
@@ -3361,7 +3361,7 @@ analyze_candidates_and_replace (void)
         less expensive to calculate than the replaced statements.  */
       else
        {
-         unsigned length;
+         int length;
          enum machine_mode mode;
          bool speed;