rustc issue: https://github.com/rust-lang/rust/issues/55105 Steps to reproduce: ``` rustup target add armv7-linux-androideabi RUSTFLAGS="-Ctarget-feature=+neon" cargo build --target armv7-linux-androideabi --release ``` Output without this change: ``` Compiling hyper v0.12.11 (/home/simon/projects/servo-deps/hyper) LLVM ERROR: ran out of registers during register allocation error: Could not compile `hyper`. ```