{
    "llvm-target": "aarch64-unknown-none",
    "target-endian": "little",
    "target-pointer-width": "64",
    "target-c-int-width": "32",
    "data-layout": "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128",
    "arch": "aarch64",
    "os": "none",
    "env": "",
    "vendor": "unknown",
    "linker-flavor": "gcc",
    "target-family": "redox",
    "pre-link-args": {
        "gcc": ["-m64", "-nostdlib", "-static"]
    },
    "features": "+a53,+strict-align,-fp-armv8",
    "dynamic-linking": false,
    "executables": false,
    "relocation-model": "pic",
    "disable-redzone": true,
    "eliminate-frame-pointer": false,
    "exe-suffix": "",
    "has-rpath": false,
    "no-compiler-rt": true,
    "no-default-libraries": true,
    "position-independent-executables": false,
    "has-elf-tls": true
}

{
    "llvm-target": "aarch64-unknown-none",
    "target-endian": "little",
    "target-pointer-width": "64",
    "target-c-int-width": "32",
    "data-layout": "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128",
    "arch": "aarch64",
    "os": "none",
    "env": "",
    "vendor": "unknown",
    "linker-flavor": "gcc",
    "target-family": "redox",
    "pre-link-args": {
        "gcc": ["-m64", "-nostdlib", "-static"]
    },
    "features": "+strict-align,-neon,-fp-armv8,+tpidr-el1",
    "dynamic-linking": false,
    "executables": false,
    "relocation-model": "pic",
    "disable-redzone": true,
    "eliminate-frame-pointer": false,
    "exe-suffix": "",
    "has-rpath": false,
    "no-compiler-rt": true,
    "no-default-libraries": true,
    "position-independent-executables": false,
    "has-elf-tls": true
}

Use target-feature for NEON insn suppression and tpidr_el1 use
aarch64: Use target-feature for NEON insn suppression and tpidr_el1 use
