Fix tests for a future nightly #297
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In rust-lang/rust#47743 the SIMD types in the Rust ABI are being switched to getting passed through memory unconditionally rather than through LLVM's immediate registers. This means that a bunch of our assert_instr invocations started breaking as LLVM has more efficient methods of dealing with memory than the instructions themselves. This switches `assert_instr` to unconditionally use a shim that is an `extern` function which should revert back to the previous behavior, using the simd types as immediates and testing the same.
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In rust-lang/rust#47743 the SIMD types in the Rust ABI are being switched to
getting passed through memory unconditionally rather than through LLVM's
immediate registers. This means that a bunch of our assert_instr invocations
started breaking as LLVM has more efficient methods of dealing with memory than
the instructions themselves.
This switches
assert_instrto unconditionally use a shim that is anexternfunction which should revert back to the previous behavior, using the simd types
as immediates and testing the same.