Use the niche optimization if other variant are small enough - #70477

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ogoffart wants to merge 7 commits into

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ogoffart:enum-layout-optim

Commits on Apr 16, 2020

Put the largest niche first
ogoffart
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23d815c
Fix the re-ordering of the field to put the niche first
ogoffart
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059b19a
Use the niche optimisation if other enum variant are small enough
ogoffart
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d58273b
Add test from #63866
ogoffart
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823d5b7
Only use the padding for the discriminent if it is bigger than the biggest niche
ogoffart
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3ff98d9
Simplify the detection of the largest variant
ogoffart
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39e9dae
Do both the non-niche layout and the niche layout and compare the result
ogoffart
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0d43af1