------- Comment #19 from rguenth at gcc dot gnu dot org 2007-07-16 15:51 ------- The backported patch causes
FAIL: gcc.c-torture/execute/pr28778.c execution, -O2 FAIL: gcc.c-torture/execute/pr28778.c execution, -Os DCE removes - -<L1>:; - list[3] = 42; we have one added constraint: blist.0_7 = blist_1 +*blist.0_7 = &ANYTHING ESCAPED_VARS = blist.0_7 IL differences after alias1 are @@ -251,12 +247,11 @@ list[3] = 42; blist_6 = &list; - # list_8 = PHI <list_4(3), list_5(4)>; # blist_1 = PHI <blist_3(3), blist_6(4)>; <L2>:; blist.0_7 = (const GLint *) blist_1; - # list_10 = V_MAY_DEF <list_8>; - # NONLOCAL.44_11 = V_MAY_DEF <NONLOCAL.44_9>; + # NONLOCAL.44_10 = V_MAY_DEF <NONLOCAL.44_8>; + # SMT.45_11 = V_MAY_DEF <SMT.45_9>; aglChoosePixelFormat (blist.0_7); return; we also have +NULL = &ANYTHING but this doesn't result in IL differences. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32328