------- Comment #14 from rguenther at suse dot de 2007-06-22 09:45 ------- Subject: Re: [4.3 Regression] cannot take address of bit field
On Fri, 22 Jun 2007, hubicka at ucw dot cz wrote: > ------- Comment #12 from hubicka at ucw dot cz 2007-06-22 09:35 ------- > Subject: Re: [4.3 Regression] cannot take address of bit field > > Hi, > I've experimented with this a bit - the problem is that the error is > produced during gimplification: gimplifier translates the expression > into the addr_expr form and later gimplifying the addr_expr it calls the > mark_addressable langhook that porudces the error. > > It seems to me that this langhook call is unnecesary. Removing it > breaks since C++ is sometimes producing references to objects not having > addr_expr during gimplification, but it seems to me that adding just > generic code that takes gimple addr_expr and marks bit addressable (just > as aliasing does) instead the full blown langhook should just work? > > THe typechecking in frontend should be enough to catch this sort of > syntax errors (when address is taken form something language prohibits). > Does this seem sane? Yes. It looks like a frontend bug if the tree was not marked addressable before gimplification but would need to after. Richard. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31541
