[llvm] [IR] Fix crash when creating llvm.powi.* by `CreateBinaryIntrinsic` (PR #67263)

[Nikita Popov via llvm-commits]

https://github.com/nikic requested changes to this pull request.

This change is completely incorrect. The passed types here are the mangling types of the intrinsic, not the operand types. CreateBinaryIntrinsic only supports intrinsics with two operands that are mangled on the single type, as the documentation says:

> Create a call to intrinsic ID with 2 operands which is mangled on the first type.

Passing an additional type will result in incorrect intrinsic mangling.

https://github.com/llvm/llvm-project/pull/67263