Paolo Bonzini <[EMAIL PROTECTED]> writes:
> My opinion:
>>> (set (subreg:HI (reg:SI) 2) ...
>>> DF_REF_READ_WRITE?
>
> yep, only case without PARTIAL

Sorry if this is a daft question, but why would it be treated as a read?
I thought that without strict_lowpart, this sort of subreg assignment
was morally equivalent to a normal REG definition in which the upper
bits are "don't care".

Richard

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