Re: [Committed] PR26557: Handle const_int in emit_case_nodes

[Andrew Pinski <pinskia at physics dot uc dot edu>]

On Mar 13, 2006, at 6:37 PM, Roger Sayle wrote:

> The second of the two fixes mentioned above follows the "why fix it
> once" idiom, by teaching fold-const.c/fold_stmt that dereferencing
> constant initialized arrays with a constant index returns a constant
> result.  This should allow the constant index in the test case below
> to be seen by the tree-ssa optimizers.  Unfortunately, this second
> change is significantly more intrusive, and probably not appropriate
> for the 4.0 and 4.1 release branches.

Store CCP already does this optimization which is why at -O2 the ICE
does not show up.  Now one could argue that Store CCP should also be
turned on at -O1 (which I think is a good thing).

-- Pinski