[PATCH] D143673: [lld][RISCV] Implement GP relaxation for R_RISCV_HI20/R_RISCV_LO12_I/R_RISCV_LO12_S.

Wed Feb 22 16:38:30 PST 2023

craig.topper added a comment.

In D143673#4142628 <https://reviews.llvm.org/D143673#4142628>, @jrtc27 wrote:

> In D143673#4142568 <https://reviews.llvm.org/D143673#4142568>, @craig.topper wrote:
>
>> @MaskRay here's some data I collected on SPEC2006 .text size and dynamic instruction counts with and without GP relaxation using the GNU linker. I also measured using GP as a callee-saved register. https://docs.google.com/spreadsheets/d/14V7cPbyc80AcGHzsMaw9hYb232dzRbGCmTApnxj-SpU/edit?usp=sharing
>
> TL;DR is neither really gets you much of a saving and the only real benefit comes from tiny benchmarks / embedded use cases?..

I think that's a fair summary.

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D143673/new/

https://reviews.llvm.org/D143673