re PR regression/54084 (Bunch of fails for x86)

	PR regression/54084
	* sel-sched-ir.c (cmp_v_in_regset_pool): Clarify logic, fix
	pointer difference check.

From-SVN: r189891

gcc/ChangeLog

+2012-07-26  Steven Bosscher  <steven@gcc.gnu.org>
+
+	PR regression/54084
+	* sel-sched-ir.c (cmp_v_in_regset_pool): Clarify logic, fix
+	pointer difference check.
+
 2012-07-26  Bill Schmidt  <wschmidt@linux.ibm.com>
 
 	* tree-ssa-loop-ivopts.c (mbc_entry_hash): Remove.

gcc/sel-sched-ir.c

@@ -954,7 +954,13 @@ return_regset_to_pool (regset rs)
 static int
 cmp_v_in_regset_pool (const void *x, const void *xx)
 {
-  return *((const regset *) x) - *((const regset *) xx);
+  uintptr_t r1 = (uintptr_t) *((const regset *) x);
+  uintptr_t r2 = (uintptr_t) *((const regset *) xx);
+  if (r1 > r2)
+    return 1;
+  else if (r1 < r2)
+    return -1;
+  gcc_unreachable ();
 }
 #endif