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Re: [RFC] failures found while pounding on GCC trunk
"Richard Guenther" <richard.guenther@gmail.com> writes:
> > We've got a test case with gcc 4.2 for which compilation time goes
> > from nine minutes to 30 seconds when we use that option. I know the
> > code is much better in mainline. Still, I would prefer to keep the
> > option unless we are certain that similar compilation time blowouts
> > can not occur. Lots of code can profit from optimization even with
> > struct aliasing turned off.
>
> Well, ATM the flag doesn't work. And honestly we have enough "kinds"
> of alias bugs - adding another knob to get different wrong-code bugs
> doesn't look too appealing to me ;)
Well, if the -fno-tree-salias flag now causes wrong-code bugs then I
certainly agree that it should be eliminated.
The gcc 4.2 issue we saw wasn't wrong code either way, it was just a
compilation time issue.
Ian