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Re: Some remodelling of the ARM vld and vst patterns
- From: Richard Sandiford <richard dot sandiford at linaro dot org>
- To: gcc-patches at gcc dot gnu dot org
- Date: Wed, 30 Mar 2011 10:00:13 +0100
- Subject: Re: Some remodelling of the ARM vld and vst patterns
- References: <g4sju6ouzz.fsf@linaro.org>
Richard Sandiford <richard.sandiford@linaro.org> writes:
> The ??? is saying that the V8QI-derived MEM is really a 3-byte access,
> not a 4-byte (SI) access, and so on. The comment makes the mode sound
> like a representational niceity, but really, there's no such thing as
> a "conservatively wrong" memory size here. If a store's mode is too
> small, dependent loads could be deleted as dead. If it's too big,
> unrelated live loads could be deleted as dead.
In case it isn't obvious, I meant "unrelated live stores".
Richard