Paolo Bonzini wrote:
> Dave Korn wrote:
>> daniel.tian wrote:
>>
>>>>>  2) what pass is producing those subregs?
>>> This is really puzzled me. I just wrote the PROMOTE_MODE like MIPS. 
>>> Any advice?
>>   Turn on the RTL dump files and see where the subregs first appear?
> 
> Yes, that's waht I meant.
> 
> Paolo

  We should probably also take a look at the movhi pattern(s) while we're at it.

    cheers,
      DaveK

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