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Re: [PATCH, pretty-ipa merge 0/4] IPA-SRA


On Wed, Jun 24, 2009 at 06:11:50AM -0700, H.J. Lu wrote:
> On Wed, Jun 24, 2009 at 4:20 AM, Martin Jambor<> wrote:
> > Hi,
> >
> > this  patch-set is  a proposed  merge of  IPA-SRA from  the pretty-ipa
> > branch to the trunk.  I have talked about IPA-SRA at the summit and it
> > is also described in the paper.  Shortly, it changes the parameters of
> > local functions in the following ways:
> >
> >  - removes parameters that are not used at all,
> >  - passes parameters by value instead of by reference if possible and
> >    hopefully profitable
> >  - passes only parts of aggregate parameters if only those are used
> >    in the function (often combined with the above transformation)
> >
> > The  pass  has  been sitting  in  pretty-ipa  for  some time,  I  have
> > bootstrapped it  on i386-linux and  x86_64-linux where I also  ran the
> > regression testsuite without any new problems popping up.
> >
> > I'd like  therefore ask for the  final review and hopefully  an ACK to
> > commit to trunk.
> >
> I think you should fix all new SRA regressions first before
> another SRA related merge.

The only remaining serious SRA regression  that I know of is PR 40493.
I hope I have a patch for that,  in fact I am in the middle of writing
a change  log right  now and am  about to  bootstrap and test  it.  If
everything goes fine, I'll post it  in a few hours.  Don't worry, this
has been a very high priority for me this week.

There is  another PR which  I still should  look at to  determine what
effect  the  intraprocedural SRA  has  (which  is  however a  possible
compile time regression and not  an ICE or miscompilation) and that is
PR 33928.  I  believe IPA-SRA can be reviewed  and even committed even
if  it takes  me a  while to  get to  that.  Moreover,  IPA-SRA shares
analysis  with the  intraprocedural  SRA but  the modification  almost
completely separate (except scan_function() that is).

Or are there any other SRA regressions that I do not know about?


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