Andrew, I realize I needn't back-end solution for my case at all, and in middle end I can directly use the _Bool type info! Appreciate your reply!
Thanks, -Jiangning > -----Original Message----- > From: Andrew Pinski [mailto:pins...@gmail.com] > Sent: Friday, September 02, 2011 2:27 PM > To: Jiangning Liu > Cc: gcc@gcc.gnu.org > Subject: Re: Is VRP is too conservative to identify boolean value 0 and > 1? > > On Thu, Sep 1, 2011 at 10:58 PM, Jiangning Liu <jiangning....@arm.com> > wrote: > > D.1249_3: [0, 1] > > D.1250_5: [0, 1] > > D.1251_6: [0, 1] > > Those are equivalent to [0, MAX] as _Bool only has two different > values, 0 and 1 (MAX). Can you explain more about the optimization > which you are working on that needs the ranges as (int)[0,1] rather > than (_Bool)[0,MAX] ? > > Thanks, > Andrew Pinski
