How to express the fact that arguments don't escape?

[Thomas Koenig]

On Sat, 2009-08-15 at 18:27 +0200, Tobias Schlüter wrote:
> I'm a bit worried that this could pessimize code with very short 
> functions but lots of arguments, i.e. when the copying time becomes 
> comparable to the runtime.

I don't think this will be a problem.  SSA tends to generated quite a
lot of intermediate variables anyway (just look at a typical dump for
-fdump-tree-optimized), and all the unnecessary stores will be optimized
away in the generated assembly.  We shouldn't do this if we aren't
optimizing, though.

Richard, do you concur?

	Thomas