Some remodelling of the ARM vld and vst patterns

Richard Sandiford richard.sandiford@linaro.org
Wed Mar 30 09:29:00 GMT 2011


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



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