[release/6.0] Fix issue with incorrect handling of optimized method layouts #60109
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…ort order of the RuntimeFunctions table (among others) was not properly handled when an optimized method layout was applied - While this bug applied to non-composite builds, it was easily reproduced with a composite build - Fix lack of test infrastructure around non-standard method layouts. - Add new random method sorting order - Use new random sorting order in crossgen2 test passes Fixes #59089
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Oct 7, 2021
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Backport of #59781 to release/6.0
/cc @davidwrighton
Customer Impact
Applications that enable the experimental method layout switch will not experience unpredictable runtime behavior.
Testing
The issue was detected via attempts to use the method layout optimization on larger applications.
Risk
Low. The effected code is only used within crossgen2, and the behavior change is isolated to scenarios where optimized method layout is enabled.