Can register rename pass rename a callee-saved register?

[Ian Lance Taylor]

"Mohamed Shafi" <shafitvm@gmail.com> writes:

>> Which version of gcc?  I was under the impression that this
>> longstanding buglet was cleaned up by the dataflow work.
>>
>
>    I am doing a port in gcc 4.1.2. The register is actually replaced
> by register copy-propagation optimization pass.

I believe that in gcc 4.3 this unnecessary store and load should no
longer happen.

Ian