Replace isF...() LLVM API calls with the corresponding isa<...>()

[AndreyPavlenko]

The isF...() methods have been removed in the main LLVM branch: llvm/llvm-project#123326
Fixes #3269

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[whitneywhtsang]

Why are you using a LLVM newer than the one specify in https://github.com/intel/intel-xpu-backend-for-triton/blob/main/cmake/llvm-hash.txt?

[AndreyPavlenko]

Why are you using a LLVM newer than the one specify in https://github.com/intel/intel-xpu-backend-for-triton/blob/main/cmake/llvm-hash.txt?

I'm building with a custom version of LLVM. Anyway, this fix seem compatible with both versions and will also be required when bumping the LLVM version.

[whitneywhtsang]

Can you please upstream the changes in core files directly?

[AndreyPavlenko]

Can you please upstream the changes in core files directly?

Sure, I'll do.

[AndreyPavlenko]

Can you please upstream the changes in core files directly?

Done - triton-lang/triton#5713

[whitneywhtsang]

Can you please upstream the changes in core files directly?

Done - triton-lang/triton#5713

Thanks, why is it a draft?

[AndreyPavlenko]

Thanks, why is it a draft?

Thanks, fixed.

[AndreyPavlenko]

It has been fixed upstream triton-lang/triton#5684

[whitneywhtsang]

The changes in this PR is merged in #3316, 4a99671.