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LLVM UNREACHABLE when compiling core for x32 ABI #37976

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sanxiyn opened this issue Nov 24, 2016 · 2 comments
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LLVM UNREACHABLE when compiling core for x32 ABI #37976

sanxiyn opened this issue Nov 24, 2016 · 2 comments
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A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug.

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@sanxiyn
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sanxiyn commented Nov 24, 2016 •
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$ 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)
@sanxiyn sanxiyn added the A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. label Nov 24, 2016
@sanxiyn sanxiyn mentioned this issue Nov 24, 2016
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@Mark-Simulacrum Mark-Simulacrum added the C-bug Category: This is a bug. label Jul 26, 2017
@malbarbo
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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.

@malbarbo malbarbo mentioned this issue Oct 18, 2017
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@sanxiyn
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sanxiyn commented Oct 19, 2017

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

@sanxiyn sanxiyn closed this as completed Oct 19, 2017
bors added a commit to rust-lang/libc that referenced this issue Oct 19, 2017
@bors
Auto merge of #812 - malbarbo:x32, r=alexcrichton
4d29833 
Initial fixes for linux x32

Tested with a local build of rustc. The main test can be compiled but fails to execute (receives SIGTRAP, which I think in this case indicates memory violation, I will open an issue in the rustc repo).

This PR is important because it fixes the definition of `c_long` and `c_ulong`. Without these fixes, rustc crash with the error:

```
Cannot emit physreg copy instruction
UNREACHABLE executed at /checkout/src/llvm/lib/Target/X86/X86InstrInfo.cpp:5778!
```

Related rust-lang/rust#37976
bors added a commit to rust-lang/libc that referenced this issue Oct 19, 2017
@bors
Auto merge of #812 - malbarbo:x32, r=alexcrichton
074125f 
Initial fixes for linux x32

Tested with a local build of rustc. The main test can be compiled but fails to execute (receives SIGTRAP, which I think in this case indicates memory violation, I will open an issue in the rustc repo).

This PR is important because it fixes the definition of `c_long` and `c_ulong`. Without these fixes, rustc crash with the error:

```
Cannot emit physreg copy instruction
UNREACHABLE executed at /checkout/src/llvm/lib/Target/X86/X86InstrInfo.cpp:5778!
```

Related rust-lang/rust#37976
bors added a commit to rust-lang/libc that referenced this issue Oct 19, 2017
@bors
Auto merge of #812 - malbarbo:x32, r=alexcrichton
7e33065 
Initial fixes for linux x32

Tested with a local build of rustc. The main test can be compiled but fails to execute (receives SIGTRAP, which I think in this case indicates memory violation, I will open an issue in the rustc repo).

This PR is important because it fixes the definition of `c_long` and `c_ulong`. Without these fixes, rustc crash with the error:

```
Cannot emit physreg copy instruction
UNREACHABLE executed at /checkout/src/llvm/lib/Target/X86/X86InstrInfo.cpp:5778!
```

Related rust-lang/rust#37976
This was referenced Oct 20, 2017
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