http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45676
--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> 2010-09-30
21:28:22 UTC ---
(In reply to comment #2)
> We can't hoist invariant control flow.
Is this not possible, not desirable, or both?
In C, you could (in principle) also hoist
for (i=0; i<10; i++) {
for (j=0; j<10; j++)
a[j] = j
/* Terms using a, no redefinition of a, no alias etc. */
}
> Also print *,c is surely thought
> to be an escape point for c and thus may clobber it.
Yes, PR 20165...
> I'd rate this impossible to do for the middle-end (and generally not worth
> the hassle to implement). Better fix your sources ;)
Well, if somebody does FORmula TRANslation and doesn't think about
this, there is not reason not to help him :-)
