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@noinline exp by default. #46359

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merged 1 commit into from
Aug 22, 2022
Merged

@noinline exp by default. #46359

merged 1 commit into from
Aug 22, 2022

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oscardssmith
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Also remove a bunch of @inline from when I didn't trust the compiler to do reasonable things. Fixes #46323. This isn't a pure win (it will stop exp from auto-vectorizing) but I think it's probably the correct choice. Autovectorization seems to me to be a separate concern.

also remove a bunch of `@inline` from when I didn't trust the compiler to do reasonable things.
@oscardssmith oscardssmith added the maths Mathematical functions label Aug 15, 2022
@N5N3 N5N3 added the backport 1.8 Change should be backported to release-1.8 label Aug 16, 2022
@chriselrod
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it will stop exp from auto-vectorizing

=(

@KristofferC
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Why would julia chose to inline this? It seems way too big for that to happen by the normal inlining heuristics, or?

@oscardssmith
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oscardssmith commented Aug 16, 2022

nope, it has a cost of 90 which is just below the cutoff. It's a lot of code, but a lot of it is Int operations that have a cost of 1.

@JeffBezanson
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From triage: seems ok, but we should also experiment with lowering the inlining cutoff --- if 90 is too expensive here, isn't it too expensive everywhere? We also no longer depend on inlining as much for constant folding, so we might not need to do so much anymore.

@KristofferC KristofferC merged commit 445586d into master Aug 22, 2022
@KristofferC KristofferC deleted the oscardssmith-no-inline-exp branch August 22, 2022 08:13
KristofferC pushed a commit that referenced this pull request Aug 26, 2022
also remove a bunch of `@inline` from when I didn't trust the compiler to do reasonable things.

(cherry picked from commit 445586d)
KristofferC pushed a commit that referenced this pull request Aug 26, 2022
also remove a bunch of `@inline` from when I didn't trust the compiler to do reasonable things.

(cherry picked from commit 445586d)
@KristofferC KristofferC removed the backport 1.8 Change should be backported to release-1.8 label Sep 7, 2022
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Performance regression in version 1.8 for exp of complex argument
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