[M3commit] CVS Update: cm3

[Jay K]

That's still there, for "returns twice", like setjmp, fork and/or vfork.
Not sure about longjmp.
Not sure if it is adequate.
   I saw PushFrame in the crashing example but I don't think I saw setjmp.
Not sure about a few things.

 - Jay


----------------------------------------
> From: hosking at cs.purdue.edu
> Date: Wed, 7 Jul 2010 15:59:08 -0400
> To: jay.krell at cornell.edu
> CC: m3commit at elegosoft.com
> Subject: Re: [M3commit] CVS Update: cm3
>
> We already volatilise as necessary for setjmp/longjmp (at least we did when last I looked, because I remember putting it in).
>
> I would prefer to avoid volatile in all other situations where possible.
>
>
> On 7 Jul 2010, at 15:54, Jay K wrote:
>
> >
> > But I admit I'm nervous about removing all the volatile, esp. on stores.
> > We should have a bunch of tests using exceptions that access locals/parameters in except and finally blocks.
> > I'm willing to put back volatile on all stores.
> > Or even loads if there is justification.
> >
> > I thought there'd be a setjmp in all functions with try/except/finally, and therefore the same
> > pessimization, but now I'm not sure of that.
> >
> > - Jay
> >
> > ----------------------------------------
> >> From: jay.krell at cornell.edu
> >> To: hosking at cs.purdue.edu; jkrell at elego.de
> >> Date: Wed, 7 Jul 2010 19:13:02 +0000
> >> CC: m3commit at elegosoft.com
> >> Subject: Re: [M3commit] CVS Update: cm3
> >>
> >>
> >> Back when all loads and stores were volatile!
> >> And the optimizer was severely hampered. Any optimized code I looked at was full of unnecessary code.
> >> Which do you prefer?
> >>
> >> - Jay
> >>
> >> ----------------------------------------
> >>> From: hosking at cs.purdue.edu
> >>> Date: Wed, 7 Jul 2010 11:56:30 -0400
> >>> To: jkrell at elego.de
> >>> CC: m3commit at elegosoft.com
> >>> Subject: Re: [M3commit] CVS Update: cm3
> >>>
> >>> This is new. It used to work!
> >>>
> >>>
> >>> On 7 Jul 2010, at 08:20, Jay Krell wrote:
> >>>
> >>>> CVSROOT: /usr/cvs
> >>>> Changes by: jkrell at birch. 10/07/07 08:20:57
> >>>>
> >>>> Modified files:
> >>>> cm3/m3-sys/m3cc/gcc/gcc/m3cg/: parse.c
> >>>>
> >>>> Log message:
> >>>> partial redundancy elimination ('pre') also crashes compiling libm3/Formatter, add comment; remove all the other stuff about disabling optimizations
> >>>
> >>
> >
>