Oliver Stannard c1eb790cd2 [ARM] Tail-calls do not require caller and callee arguments to match ...

The ARM backend was checking that the outgoing values for a tail-call
matched the incoming argument values of the caller. This isn't
necessary, because the caller can change the values in both registers
and the stack before doing the tail-call. The actual limitation is that
the callee can't need more stack space for it's arguments than the
caller does.

This is needed for code using the musttail attribute, as well as
enabling tail calls as an optimisation in more cases.

2024-10-25 09:34:08 +01:00

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