jeanPerier cd7e65398f [flang] optimize array function calls using hlfir.eval_in_mem (#118070) ...

This patch encapsulate array function call lowering into
hlfir.eval_in_mem and allows directly evaluating the call into the LHS
when possible.

The conditions are: LHS is contiguous, not accessed inside the function,
it is not a whole allocatable, and the function results needs not to be
finalized. All these conditions are tested in the previous hlfir.eval_in_mem
optimization (#118069) that is leveraging the extension of getModRef to
handle function calls(#117164).

This yields a 25% speed-up on polyhedron channel2 benchmark (from 1min
to 45s measured on an X86-64 Zen 2).

2024-12-03 10:04:52 +01:00

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