transpile: Use raw borrows in assembly translations

[Rua]

• Fixes Generated Rust for inline assembly violates borrow-checking rules #398
• Fixes ASM wrappers produce code that violates borrow rules #309

Since this depends on the changes made to asm-casts in #1712, I don't know if this will work as-is or if other changes are needed. It doesn't seem like the asm-casts crate is available for snapshot tests in any case?

[kkysen]

Since this depends on the changes made to asm-casts in #1712, I don't know if this will work as-is or if other changes are needed. It doesn't seem like the asm-casts crate is available for snapshot tests in any case?

No, not yet. The snapshot tests run rustc directly, not cargo, so resolving other dependencies is annoyingly difficult. We skip running rustc on tests containing libc, for example.

[Rua]

It doesn't seem to have any trouble with tests that require f128 though?

[kkysen]

It doesn't seem to have any trouble with tests that require f128 though?

Hmm, that's weird. Are those tests using libc, too? If so, they were just skipping running rustc.

[Rua]

I guess for now, I can mark these as "expect compile error"?

EDIT: I've now done so, but it's a rather bad hack/workaround...

[kkysen]

I guess for now, I can mark these as "expect compile error"?

EDIT: I've now done so, but it's a rather bad hack/workaround...

See #1716. It's still a workaround, as switching to cargo instead of rustc is more work, but it should be much more precise.

[kkysen]

@Rua, can you rebase this on #1719? See if that works better as a partial solution.