[PATCH] [X86] Convert esp-relative movs of function arguments to pushes, step 1

[Nadav Rotem]

> On Dec 3, 2014, at 1:45 PM, Michael Kuperstein <michael.m.kuperstein at intel.com> wrote:
> 
> 2) I don't really expect a performance change, in either direction - this step is mostly for code size. 

Reducing code size could improve performance by reducing instruction cache pressure. :) 

LGTM. 
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