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bjorn3 f6c39fa701 Rustup to rustc 1.39.0-nightly (`eeba189cf` 2019-08-24)		2019-08-25 16:30:36 +02:00
build_sysroot	Rustup to rustc 1.39.0-nightly (`eeba189cf` 2019-08-24)	2019-08-25 16:30:36 +02:00
crate_patches	Test rust-lang/regex example shootout-regex-dna	2019-07-30 13:37:54 +02:00
example	Fix float -> u/i128 cast	2019-08-21 14:35:48 +02:00
patches	Rustup to rustc 1.39.0-nightly (`eeba189cf` 2019-08-24)	2019-08-25 16:30:36 +02:00
src	Always use Linkage::Import for relocations targeting a static	2019-08-21 14:57:12 +02:00
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config.sh	Don't pass -Zalways-encode-mir to rustc	2019-08-19 16:27:33 +02:00
copy.clif	Fix some bugs	2018-08-08 10:26:25 +02:00
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rust-toolchain	Initial commit	2018-06-17 18:05:11 +02:00
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Readme.md

Work in progress cranelift codegen backend for rust

⚠⚠⚠ This doesn't do much useful yet ⚠⚠⚠

Building

$ git clone https://github.com/bjorn3/rustc_codegen_cranelift.git
$ cd rustc_codegen_cranelift
$ ./prepare.sh # download and patch sysroot src and install hyperfine for benchmarking
$ ./test.sh

Usage

$cg_clif_dir is the directory you cloned this repo into in the following instruction.

Rustc

$ rustc -Cpanic=abort -Zcodegen-backend=$cg_clif_dir/target/debug/librustc_codegen_cranelift.so --sysroot $cg_clif_dir/build_sysroot/sysroot my_crate.rs

Cargo

$ RUSTFLAGS="-Cpanic=abort -Zcodegen-backend=$cg_clif_dir/target/debug/librustc_codegen_cranelift.dylib --sysroot $cg_clif_dir/build_sysroot/sysroot" cargo run

Not yet supported

Good non-rust abi support (vectors are passed by-ref)
Checked binops (some missing instructions in cranelift)
Inline assembly (no cranelift support)
SIMD (tracked here, some basic things work)

Troubleshooting

Can't compile

Try updating your nightly compiler. You can try to use an nightly a day or two older if updating rustc doesn't fix it. If you still can't compile it, please fill an issue.