This PR adds a new complex.powi operation to MLIR's complex dialect for
computing complex numbers raised to integer powers.
Key changes include:
- Addition of the new `PowiOp` operation definition in the Complex
dialect
- Integration with algebraic simplification passes for optimization
- Support for conversion to ROCDL library calls
- Updates to Flang frontend to generate the new operation
This depends on #158642.
This PR introduces a new `ConvertComplexPow` pass for Flang that handles
complex power operations. The change forces lowering to complex.pow
operations when `--math-runtime=precise` is not used, then uses the
`ConvertComplexPow` pass to convert these operations back to library
calls.
- Adds a new `ConvertComplexPow` pass that converts complex.pow ops to
appropriate runtime library calls
- Updates complex power lowering to use `complex.pow` operations by
default instead of direct library calls
#158722 Adds a new `complex.powi` op enabling algebraic optimisations.
