[tree-ssa] COND_EXPR lowering.

[law@redhat.com]

In message <20031024175210.GA17291@atrey.karlin.mff.cuni.cz>, Zdenek Dvorak wri
tes:
 >Hello,
 >
 >>  >> You can't always use the CFG for everything.
 >>  >
 >>  >I don't say for everything.  But following the gotos is the reason for
 >>  >having cfg.
 >> Err, there are cases where we may want to follow gotos without a CFG.  Say
 >> in that wonderful little place when we've translated out of ssa form,
 >> but have not translated into RTL.
 >
 >and what? You still have a cfg there, unless you are stupid enough to
 >throw it away.  And if you do, why are you concerned about assumptions
 >on things that are only relevant in case you have cfg?
It's not a question of being "stupid" it's a question of making changes
in which it's a royal pain in the ass to update the CFG.  Been there, done
that.

jeff