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Re: [PATCH: ARM] PR 45335 Use ldrd and strd to access two consecutive words

One question about the attribute length. It looks the attribute
expression is not very powerful according to
http://gcc.gnu.org/onlinedocs/gccint/Expressions.html#Expressions,
then how can I express following expressions:

if (fix_cm3_ldrd && (operands[2] == operands[0]))

if (offset1 <= -256)

thanks
Carrot

>
> Additionally, all the define_insn patterns in the patch can generate
> more than one instruction. ?They MUST have a length attribute that
> specifies the number of bytes that can be generated when the default (4
> bytes) is insufficient; otherwise the constant placement code will fail.
>
> R.
>
>
>
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