Calculate fn ptr type discriminator from FnAbi#3
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Alongside Rust implementation of LLVM's SipHash-2-4.
This is only to be used when emitting an operand bundle, which might not have access to an Instance of the function, but for which FnAbi is guaranteed to be correct.
Start moving away from global schema, by cloning it into users. Helpers for fn ptr type discrimination status and value of the key.
This is a move away from a blind bitcast between the types. Now, when dealing with function pointers, transmute will detect a domain change (change of fn ptr type) and issue resigning.
As the libc changes was merged in to the main we do not need to patch it. cc-rs still needs to be patched as compiler/rustc_llvm/Cargo.toml still pins to an old version: cc = "=1.2.16"
…g get_fn_addr call sites
Note: This is an experiment, we harness the fact that FnAbi contains type information for both return and arguments (alongside, lowered, ABI info).
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Note: This is an experiment, we harness the fact that FnAbi contains type information for both return and arguments (alongside, lowered, ABI info).