RFA: patch to solve IRA PR48336, PR48342, PR48345

[Jeff Law]

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On 03/29/11 19:28, Vladimir Makarov wrote:
> The following patch is to solve PR48336, PR48342, PR48345.  The
> profitable hard regs exclude hard regs which are prohibited for the
> corresponding allocno mode. It is true for primary allocation and it is
> important for better colorability criteria.  Function assign_hard_reg is
> also based on this assumption.  Unfortunately, it is not true for
> secondary allocation (after IRA IR flattening or during reload).  The
> following patch solves this problem.
> 
> The patch should be very safe but I am still testing it on x86/x86-64
> bootstrap.
> 
> Is it ok to commit the patch after successful bootsrapping?
> 
> 2011-03-29  Vladimir Makarov <vmakarov@redhat.com>
> 
>         PR target/48336
>         PR middle-end/4834
>         PR rtl-optimization/48345
>         * ira-color.c (setup_conflict_profitable_regs): Exclude prohibited
>         hard regs for given mode from profitable regs when doing secondary
>         allocation.
This is OK.  Note the PR# in the ChangeLog (4834) should be (48342).

jeff

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