[llvm-bugs] [Bug 51460] New compile time regressions (12 vs 13) on znver3 (LoopMicroOpBufferSize too large?)

via llvm-bugs llvm-bugs at lists.llvm.org
Fri Aug 13 08:18:26 PDT 2021


David Bolvansky <david.bolvansky at gmail.com> changed:

           What    |Removed                     |Added
             Status|RESOLVED                    |REOPENED
            Summary|New compile time            |New compile time
                   |regressions (12 vs 13)      |regressions (12 vs 13) on
                   |                            |znver3
                   |                            |(LoopMicroOpBufferSize too
                   |                            |large?)
         Resolution|DUPLICATE                   |---

--- Comment #5 from David Bolvansky <david.bolvansky at gmail.com> ---
> Shouldn't LoopMicroOpBufferSize for znver3 be reduced?

Yeah, there should be a more reasonable value because as wee see for reported
projects, regressions are huge (and hardly with 30% better runtime perf to
“justify” them).

Reopened, renamed a bit.

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