Benjamin Maxwell 3073c3c229 [SDAG] Avoid creating redundant stack slots when lowering FSINCOS (#108401) ...

When lowering `FSINCOS` to a library call (that takes output pointers)
we can avoid creating new stack allocations if the results of the
`FSINCOS` are being stored. Instead, we can take the destination
pointers from the stores and pass those to the library call.

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Note: As a NFC this also adds (and uses) `RTLIB::getFSINCOS()`.

2024-09-24 13:36:21 +01:00

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