[llvm-dev] [GlobalISel] gen-global-isel failed to work

[Leslie Zhai via llvm-dev]

在 2017年12月20日 18:44, Alex Bradbury 写道:
> On 20 December 2017 at 09:51, Leslie Zhai via llvm-dev
> <llvm-dev at lists.llvm.org> wrote:
>> Sorry, I am apprentice of lowRISC, and meet new bug when porting GlobalISel
>> to RISCV target
>> https://github.com/xiangzhai/llvm/commit/b3f91ea54d9fee0ef7e73a32c6b8456bbe252811
> Hi Leslie. You're going to run into a challenge with GlobalISel and
> the RISC-V backend due to our use of variable-sized register classes
> (http://lists.llvm.org/pipermail/llvm-dev/2016-September/105027.html).
> I believe that neither GlobalISel or FastISel have been updated to
> support this concept.
I am reading the thread you mentioned in the mailing list, and I will 
try Krzysztof's patch, so it is an opportunity to hack lib/CodeGen just 
like RegAlloc :) 
http://lists.llvm.org/pipermail/llvm-dev/2017-December/119741.html

>
> Best,
>
> Alex

-- 
Regards,
Leslie Zhai - https://reviews.llvm.org/p/xiangzhai/