[Bug tree-optimization/18133] computed gotos are not folded back to regular gotos when it is found that they are not computed gotos at all

[kazu at cs dot umass dot edu]

------- Additional Comments From kazu at cs dot umass dot edu  2005-01-24 20:56 -------
Subject: Re:  computed gotos are not folded
 back to regular gotos when it is found that they are not computed gotos at
 all

Hi Jeff,

> Interesting approach.   I'm not sure if your approach is easier
> than just expanding the threading code to handle threading indirect
> jumps.
> 
> I don't initially *think* that extending the threading code would be 
> all that difficult.  In fact, all I think we need to do is update
> the selection code to detect this case -- I think the code to update
> the CFG and SSA graphs will DTRT without any changes.

Some people do not want to see DOM getting bigger and bigger, so I
just wanted to point out that there is an approach without making DOM
any bigger, but then you're right.  I don't think extending the jump
threader is all that difficult or dirty, either.  Either approach
works for me.

Kazu Hirata


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18133