Re: [patch] Remove redundant calls to copy_virtual_operands

[Zdenek Dvorak <rakdver@kam.mff.cuni.cz>]

Hello,

> > on the other hand, the fact that there are ICEs shows that there is some
> > problem in setting the alias information for the new statements in
> > vectorizer -- if this were correct, the virtual operands would be
> > exactly the same as the ones of the original statement; so although I
> > agree that leaving things to update_ssa is easier to maintain (although
> > possibly much slower), it would be nice if someone could check what does
> > the alias information updating code in vectorizer get wrong,
> 
> Currently the vectorizer both sets a memory tag and copies virtual
> operands. Sometimes, like in the example below, the tag provided by the
> vectorizer is more accurate than the alias information we had before, i.e.,
> the virtual operands of the scalar memory operations (although I only have
> a testcase for this on 4.1.1).

OK, the patch is correct, then.

Zdenek