Re: Disable sibcalls for all targets

[Andrew Haley <aph at redhat dot com>]

Andrew Pinski writes:
 > 
 > 
 > sibcall optimization usually speeds up many programs and makes them
 > smaller (in fact on ppc, if there is only one call at the end, it
 > does not have to save the link register at all, so it can speed up
 > considerably on the 750/7400/7500 series because they mflr and mtlr
 > and serializing instructions because lr is not renamed).
 > 
 > In fact I think Java is faulty if depends on what is in the
 > backtrace but that is a different argument.

How is that a different argument?  We have to disallow all
optimizations that don't conform to the language specification.
That's the same for C and Java and any other language.

Andrew.