Tom Eccles 8301e48500 [flang][FIR] add FirAliasAnalysisOpInterface (#68317) ...

This interface allows (HL)FIR passes to add TBAA information to fir.load
and fir.store. If present, these TBAA tags take precedence over those
added during CodeGen.

We can't reuse mlir::LLVMIR::AliasAnalysisOpInterface because that uses
the mlir::LLVMIR namespace so it tries to define methods for fir
operations in the wrong namespace. But I did re-use the tbaa tag type to
minimise boilerplate code.

The new builders are to preserve the old interface without the tbaa tag.

2023-10-11 15:06:50 +01:00

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