[Patch, IRA]: Use LOCAL_REGNO in cost computation for pro/epilogue

[Jeff Law]

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On 02/22/11 07:41, Georg-Johann Lay wrote:
> This patchlet was proposed by Paolo Bonzini in
> 
> http://gcc.gnu.org/ml/gcc/2010-10/msg00427.html
> 
> Hard regs for which LOCAL_REGNO is true do not cause costs in
> prologue/epilogue because they need not to be saved/restored.
> 
> 2011-02-11  Georg-Johann Lay  <avr@gjlay.de>
> 
> 	* ira-color.c (assign_hard_reg): Honor LOCAL_REGNO in cost
> 	computation for	prologue/epilogue.
Vlad approved this patch here:

http://gcc.gnu.org/ml/gcc/2011-03/msg00108.html

I went ahead and installed it after a bootstrap & regression test run.


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