i386: add a variant peephole for decl (mem)

Uros Bizjak ubizjak@gmail.com
Sat Feb 20 09:28:00 GMT 2016

(please CC me on x86 specific patches)

> PR 49095 requested the following optimization:


> * config/i386/i386.md (operation on memory peephole): Duplicate an
> existing peephole and adapt it to match lea rather than an operation
> that clobbers CC.

OK for mainline and release branches after a week or so without
problems in mainline.


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