[PATCH] D79785: [ARM] Register pressure with -mthumb forces register reload before each call

Tue Jul 28 05:47:12 PDT 2020

prathamesh added a comment.

In D79785#2152781 <https://reviews.llvm.org/D79785#2152781>, @dmgreen wrote:

> Hello.
>
> Do you have some codesize number for this, across some large-ish test suite? I would recommend the llvm-test-suite if you can get it compiling on Thumb1 - at least enough to get codesize number from it.

Hi, Sorry for late response. Unfortunately, we are having some infra issues for benchmarking code-size natively on SPEC, and am getting consistent build failures while building llvm natively on arm.
Do you have any suggestions on how to cross compile LLVM testsuite with -march=armv6-m enabled ? I did a cross compilation with SPEC, and code-size difference across all object files that got built was around 6.14%. I will report more descriptive results for SPEC after our infra issues get resolved. In the interim, I am also trying to test my patch for chromium.

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D79785/new/

https://reviews.llvm.org/D79785