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Re: [PATCH] pdp11: remove -mabshi
On Nov 19, 2010, at 12:40 PM, Richard Henderson wrote:
> On 11/18/2010 06:01 PM, Paul Koning wrote:
>> The -mabshi switch turns on/off the builtin abs pattern, which is redundant with -builtin-abs...
>
> Well, no, it isn't. The abs pattern will be automatically generated
> from something like (a < 0 ? -a : a).
>
> That said, the pattern that you provide is pretty much exactly what
> the compiler would generate itself; it doesn't seem worthwhile to
> provide it at all.
Thanks. I've been eliminating some patterns that didn't seem to add value; I'll add abshi to the list.
paul