[llvm] [MLGO] Add EvolutionInlineAdvisor (PR #166386)

[Mircea Trofin via llvm-commits]

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+; RUN: opt -passes='default<O3>' \
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mtrofin wrote:

add a mode to this test using the default policy where it's clear that f2 would be inlined (it's super-appealing to inline it) - i.e. so there's a behavioral difference.

https://github.com/llvm/llvm-project/pull/166386