[llvm] [Inliner] Add cost model loop penalty for -Os. (PR #227042)

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@llvm/pr-subscribers-llvm-analysis

Author: Alina Sbirlea (alinas)

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<summary>Changes</summary>

In addition to having the loop penaly for -Oz build mode, add it to -Os as well. Both optimization modes should cosider size implication and avoid inlining inside loops.

The reduction seen in an internal test build with -Os goes from 200+s to negligible in LoopFullUnrollPass, due to avoiding inlining at ~4k callsites of a function with a small loop, inside a loop nest.

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Full diff: https://github.com/llvm/llvm-project/pull/227042.diff


1 Files Affected:

- (modified) llvm/lib/Analysis/InlineCost.cpp (+2-2) 


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https://github.com/llvm/llvm-project/pull/227042