julia

c88f4e27 - Pass CodeGenOpt::Less to LLVM at O1 (rather than CodeGenOpt::None). (#37893)

Pass CodeGenOpt::Less to LLVM at O1 (rather than CodeGenOpt::None). (#37893) For context, please see https://github.com/JuliaLang/julia/pull/35086#issuecomment-700944522. Regarding alignment with clang, please see https://reviews.llvm.org/D28409 (/https://github.com/JuliaLang/julia/pull/35086#issuecomment-598282810). ``` Prior to Julia 1.5, Julia passed CodeGenOpt::Aggressive to LLVM at -O1. As of Julia 1.5, Julia passes CodeGenOpt::None to LLVM at -O1. This reduction in optimization effort at -O1 improved compilation latency, but induced appreciable runtime regressions. This commit makes Julia pass CodeGenOpt::Less to LLVM at -O1, mitigating the runtime regressions caused by CodeGenOpt::None, while retaining most of CodeGenOpt::None's latency improvements. This commit also aligns Julia's CodeGenOpt selection at -O1 with that of clang. ``` Best! :)