Guy David 4d4b7cc69e [AArch64] Skip storing of stack arguments when lowering tail calls (#126735) ...

This issue starts in the selection DAG and causes the backend to emit
the following for a trivial tail call:
```
ldr w8, [sp]
str w8, [sp]
b func
```

I'm not too sure that checking for immutability of a specific stack
object is a good enough of a gurantee, because as soon a tail-call is
done lowering,`setHasTailCall()` is called and in that case perhaps a
pass is allowed to change the value of the object in-memory?

This can be extended to the ARM backend as well.
Removed the `tailcall` keyword from a few other test assets, I'm
assuming their original intent was left intact.

2025-06-06 11:26:24 +03:00

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