LLVM UNREACHABLE when compiling core for x32 ABI

[sanxiyn]

$ cat x86_64-unknown-linux-gnux32.json
{
    "arch": "x86_64",
    "data-layout": "e-m:e-p:32:32-i64:64-f80:128-n8:16:32:64-S128",
    "llvm-target": "x86_64-unknown-linux-gnux32",
    "os": "linux",
    "linker-flavor": "gcc",
    "target-endian": "little",
    "target-pointer-width": "32"
}
$ rustc --target x86_64-unknown-linux-gnux32 $(rustc --print sysroot)/lib/rustlib/src/rust/src/libcore/lib.rs
Cannot emit physreg copy instruction
UNREACHABLE executed at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/src/llvm/lib/Target/X86/X86InstrInfo.cpp:4708!
$ rustc --version
rustc 1.15.0-nightly (3bf2be9ce 2016-11-22)

[malbarbo]

I was able to build x86_64-unknown-linux-gnux32 in my machine. I've submitted a PR to add it to rustc.

I had to disable elf tls, maybe this is the reason you got an error.

[sanxiyn]

This seems somehow fixed, although I am not sure when.