http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52563
--- Comment #6 from Jiangning Liu <liujiangning at gcc dot gnu.org> 2012-03-20 02:32:12 UTC --- > We cannot fix it without relaxing the POINTER_PLUS_EXPR constraints. > I was working on that, but as usual the TYPE_IS_SIZETYPE removal > has priority. Do you mean you are also working on removing TYPE_IS_SIZETYPE? > > Please consider fixing/XFAILing the testcases as they still FAIL and you > are responsible for this. You can open a new enhancement PR covering > this. > I think 64-bit mode should also have this optimization enabled. XFAIL implies the missing of this optimization is a correct behavior. But I think this is not what I expected. So I don't think we should add XFAIL for this case. Instead I want to add a new test case scev-5.c to cover 64-bit testing. Thanks, -Jiangning
