Re: [sdcc-devel] Peephole rules utily stm8's inderict adressing

[Philipp K. K. <pk...@sp...>]

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On 16.06.2014 14:13, Sebastien Lorquet wrote:
> hello
> 
> I'm a real noob in compilation, but I'm wondering: if you
> "shortcut" the affectation to the X register, isn't there a risk
> that some subsequent opcode will depend on the value inside x, and
> find something funny instead of the expected value?
> 
> BR,
> 
> Sébastien Lorquet

We have the function notUsed() that can be used in peepholes to check
that the value in x is not read again.

Philipp

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