[llvm] [SimplifyLibCalls] Avoid simplifying pow(x, 2.0) -> x * x with math-errno. (PR #183099)

[Yunbo Ni via llvm-commits]

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cardigan1008 wrote:

Hi @rj-jesus, this seems to raise the same issue for the `pow(x, -1.0) -> 1.0 / x` fold. If removing the `pow` libcall is only valid when the call is known not to access memory under `math-errno`, should this fold also be gated on `Pow->doesNotAccessMemory()`?

https://github.com/llvm/llvm-project/pull/183099