Cranelift: Leave the return address in place for most tail calls on x64 #6650
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When the size of the tail callee's and tail caller's stack arguments is the same, we don't need to copy the return address and then write it to the stack again, since its original location will also be its final location. That is, we were previously reading a value and then writing it back to the exact same location.
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When the size of the tail callee's and tail caller's stack arguments is the same, we don't need to copy the return address and then write it to the stack again, since its original location will also be its final location. That is, we were previously reading a value and then writing it back to the exact same location.
Builds on top of #6635