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Re: [PATCH] RHS INDIRECT_REF optimizations (PR tree-optimization/26069)
On Jan 12, 2008 1:55 PM, Andrew Pinski <pinskia@gmail.com> wrote:
> On Jan 12, 2008 3:40 AM, Richard Guenther <richard.guenther@gmail.com> wrote:
> > Technically I think we should use common machinery via
> > folding VIEW_CONVERT_EXPRs for this kind of type-punning and
> > not sticking the simplification in indirect-ref folding (that is, in
> > indirect-ref folding build_fold a VIEW_CONVERT_EXPR).
>
> To do this, you would then need to extend DECL_GIMPLE_REG_P to all
> types and maybe have a pass which also converts some non
> DECL_GIMPLE_REG_P to be true if it is valid for them.
I'm curious, why?
We can simply insert VIEW_CONVERT_EXPRs only if they fold to sth non
VIEW_CONVERT_EXPR if this is a problem.
Richard.