[PATCH] D126392: [RISCV] Use two ADDIs to do some stack pointer adjustments.

[Alexander Richardson via Phabricator via llvm-commits]

arichardson added a comment.

In D126392#3540178 <https://reviews.llvm.org/D126392#3540178>, @luismarques wrote:

> In D126392#3539458 <https://reviews.llvm.org/D126392#3539458>, @arichardson wrote:
>
>> This may break assumptions that some unwinding code uses (e.g. an kernel backtrace without debug info). But then again I don't know if any of them handle non-immediate offsets anyway.
>
> What do you mean? Unwinding with neither the frame pointer nor CFI?

Yeah I've seen such implementations for MIPS, maybe there are some for RISC-V too. This was not meant as a request to change anything, no one should rely on specific code generation patterns unless it's mandated by a specification.


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  https://reviews.llvm.org/D126392/new/

https://reviews.llvm.org/D126392