Will tree-ssa be GCC 3.5?

[Steven Bosscher]

On Monday 01 December 2003 16:22, Richard Kenner wrote:
>     The new GNU Fortran 95 compiler (gfortran) is deliberately tied to
>     tree-ssa; unless I'm mistaken, Fortran 95 support will only exist in
>     mainline GCC if tree-ssa becomes mainline.
>
> I strongly doubt that's correct.  A front-end that's designed to use
> tree-ssa can very easily be reworked to use the 3.4 function-at-a-time
> approach.  (The other direction is harder, but not even that much harder.
> The hard case is converting a front end that directly generates RTL into
> using tree-ssa.) There's no reason to tie the release schedule of such a
> project to the release schedule of tree-ssa: if the latter happens to slip
> significantly, gfortran can still be released as a 3.4-based front end.

<grin> but only after duplicating about 20% of the tree-ssa work (i.e. all 
function lowering, inlining and part of expansion), and the generated code 
would be so horrible that no sane Fortran user would dare touch it ;-)  Been 
there, done that.

Gr.
Steven