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Re: Subreg splitting and floating point
Frederic Riss <frederic.riss@gmail.com> writes:
> On 6 January 2011 17:02, Ian Lance Taylor <iant@google.com> wrote:
>> Oh yeah, you should never have a subreg of a subreg. ÂThat's a bug.
>> Where did that come from?
>
> Oh, that's interesting information! I have a splitter for movdf that
> must be the culprit. I will tighten the split condition to disallow
> splitting a subreg and I bet it will fix it all.
It may be OK to split the subreg, but make sure you generate the new
subreg using simplify_gen_subreg, rather than just generating it from
a define_insn pattern.
Ian