[Bug tree-optimization/23382] [4.1 Regression] tree-ssa-alias creates a new virtual variable for malloc each time may_alias is run (HEAP)

[dberlin at dberlin dot org]

------- Additional Comments From dberlin at gcc dot gnu dot org  2005-08-14 04:04 -------
Subject: Re:  [4.1 Regression] tree-ssa-alias
	creates a new virtual variable for malloc each time may_alias is run (HEAP)

On Sun, 2005-08-14 at 03:48 +0000, pinskia at physics dot uc dot edu
wrote:
> ------- Additional Comments From pinskia at physics dot uc dot edu  2005-08-14 03:48 -------
> Subject: Re:  [4.1 Regression] tree-ssa-alias creates a new virtual variable for malloc each time may_alias is run (HEAP)
> 
> 
> On Aug 13, 2005, at 11:40 PM, dberlin at dberlin dot org wrote:
> 
> > Uh, so?
> We keep the virtual variable around even in the clobbered variables.
I thought the call clobbered list was recomputed at the same time, which
should alleviate this problem.

If not, *that* is buggy.

Recreating the heap variables is *not* a bug.  Redoing alias information
is sometihng we may not want to do, but the fact that it requires us to
recreate heap variables is a fact of life.




-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23382