5978bb2936
This commit is for #107569 and #126817. Stop changing musttail's caller and callee's function signature when calling convention is not swifttailcc nor tailcc. Verifier makes sure musttail's caller and callee shares exactly the same signature, see commit 9ff2eb1 and #54964. Otherwise just make sure the return type is the same and then process musttail like usual calls. close #107569, #126817