> My only worry would be asking for the length early in the RTL pipeline
> may not be as accurate, but it's supposed to work, so if you're
> comfortable with the end results, then OK.
>
Indeed, the length is not accurate, but the results seem slightly
better than using COST_RTX. Using INSN_COSTS seems to me a better
manageable way in controlling what combiner does.
Anyhow, for ARC the instruction size is accurate quite late in the
compilation process as it needs register and immediate value info :(

Thank you for you review,
Claudiu

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