[RFA/RFC, IRA] Fix PR bootstrap/37859

[Vladimir Makarov]

Adam Nemet wrote:
> Since then I finished regression-testing on {mips64octeon,x86_64}-linux-gnu.
>
> On MIPS, because of the boostrap failure I of course don't have reference
> testresults.  So I used
> http://gcc.gnu.org/ml/gcc-testresults/2008-10/msg00581.html.
>
> There were three new failures all unrelated to the patch.  The first was PR
> middle-end/37669.  The second was PR fortran/37319.  The third was IRA-related
> but even existed before the patch:
>
>   PASS->FAIL (total: 4) 
>     gcc.target/mips/dspr2-MULT.c scan-assembler ac2 
>     gcc.target/mips/dspr2-MULT.c scan-assembler ac3 
>     gcc.target/mips/dspr2-MULTU.c scan-assembler ac2 
>     gcc.target/mips/dspr2-MULTU.c scan-assembler ac3 
>
> OK to install?
>
>   
Adam, thanks for analyzing the problem.  I am working on it.  I need 
some time to think because I have some doubts that is your patch is a 
right solution. I hope we will find a solution on this week.