Fix functions not being kept for debugger #73678
Merged
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Explanation: At Onone, many types of functions (anything user written, compiler generated setters and getters, etc), should be kept in the final binary so they're accessible by the debugger. They were previously being optimized out.
Scope: changes which functions should be kept for the debugger or not.
Risk: Low, affects whether a function should be optimized out or not, but not the actual logic of IRGening functions.
Testing: Added a compiler test. Modified a few tests to match the current expected behavior.
Issue: rdar://126763340
Reviewer: @adrian-prantl @al45tair @eeckstein