Re: [gcc-in-cxx] PATCH COMMITTED: Combine all tree codes into one enum

[Chris Lattner <clattner at apple dot com>]

On Jun 19, 2008, at 12:20 PM, Ian Lance Taylor wrote:

> One hassle with compiling gcc in C++ is that we casually mix enum
> types in the frontends.  This was originally done because the code
> field in the tree type was eight bits, and there was not enough room
> to hold all the different tree codes used by all the frontends.
> However, the code field is now 16 bits, and there is no longer any
> reason for the awkward tree code split.
>
> I have committed this patch to the gcc-in-cxx branch to generate a
> single set of tree codes across all the frontends.  I am testing this
> patch for mainline.

Does this cause any compile-time slowdown?  One impact of this is that  
it will make switch statement jump tables more sparse, and may cause  
them to drop down to branch trees.

-Chris