[PATCH] D29448: [RegAlloc] Don’t freeze reserved registers again if it is not necessary

[Matthias Braun via Phabricator via llvm-commits]

MatzeB added a comment.



In https://reviews.llvm.org/D29448#679472, @qcolombet wrote:

> Hi Volkan,
>
> I think LiveVariables is not used anymore and the MachineVerifier could certainly be adapted.


I wish that were true :)

However it is used pretty early in the compilation process (for PHIElimination and TwoAddressInstructions) we may or may not not need to freeze registers that early...


https://reviews.llvm.org/D29448