[trunk] Addition to subreg section of rtl.text.

[Bernd Schmidt]

Paolo Bonzini wrote:
> SPE has patterns for
> 
> [(set (match_operand:SI 0 "rs6000_nonimmediate_operand" "+r,m")
>       (subreg:SI (match_operand:SPE64TF 1 "register_operand" "r,r") 4))]
> 
> for example.

What are they trying to do?  It's dubious for a number of reasons:
- SUBREG in the instruction pattern means that we'll eventually end up 
with SUBREG of a hard register
- Any insn that matches this pattern would also match movsi
- There shouldn't really be multiple movsi patterns


Bernd
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