------- 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