[llvm] [InstCombine] Handle more even/odd math functions (PR #81324)

[Krishna Narayanan via llvm-commits]

Krishna-13-cyber wrote:

> @pogo59 Could you please help with updating `llvm/test/tools/llvm-tli-checker/ps4-tli-check.yaml`? It is unclear to me how it should be updated when adding new `math.h` functions.

Hi @agentcooper,
You can just set the added functions as unavailable for PS4/PS5 in TargetLibraryInfo.cpp which will help you pass all the checks.
```
    TLI.setUnavailable(LibFunc_erf);
    TLI.setUnavailable(LibFunc_erff);
    TLI.setUnavailable(LibFunc_erfl);
```

https://github.com/llvm/llvm-project/pull/81324