[Bug rtl-optimization/37544] [4.4 Regression] Conversion double -> unsigned long long -> unsigned -> double gives wrong results

[ubizjak at gmail dot com]

------- Comment #10 from ubizjak at gmail dot com  2008-09-17 12:01 -------
I'm testing following patch:

Index: regrename.c
===================================================================
--- regrename.c (revision 140409)
+++ regrename.c (working copy)
@@ -1314,6 +1314,9 @@
                   enum machine_mode new_mode, unsigned int regno,
                   unsigned int copy_regno ATTRIBUTE_UNUSED)
 {
+  if (GET_MODE_SIZE (copy_mode) < GET_MODE_SIZE (new_mode))
+    return NULL_RTX;
+
   if (orig_mode == new_mode)
     return gen_rtx_raw_REG (new_mode, regno);
   else if (mode_change_ok (orig_mode, new_mode, regno))


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37544