define_split

[Paolo Bonzini]

On 11/09/2010 05:38 PM, Joern Rennecke wrote:
> A define_insn will be recognized in all contexts.
> Having an insn pattern for an insn that does not actually exist can cause
> all kinds of unintended consequences as the optimizers try to generate
> and recognize 'optimized' patterns, or when reload does its stuff.

Before reload that is not a problem at all, I think, actually it can be 
an advantage.  At reload or after, the only problem I see is if someone 
is sloppy with constraints.

Paolo