61270cdaed
In multi-terms, all matching rules fire. We treat the result as an unordered set of values, so setting rule priorities is meaningless. We want to prohibit relying on the rule match order in this case. Also, codegen can produce invalid Rust if rules with different priorities both match against a multi-term. We first documented this symptom in #5647. As far as I can figure, prohibiting rule priorities prevents all possible instances of that bug. At some point in the future we might decide we want to carefully define semantics for multi-term result ordering, at which point we can revisit this.
79 lines
2.2 KiB
Rust
79 lines
2.2 KiB
Rust
//! Helper for autogenerated unit tests.
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use cranelift_isle::compile;
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use cranelift_isle::error::Errors;
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use std::default::Default;
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fn build(filename: &str) -> Result<String, Errors> {
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compile::from_files(&[filename], &Default::default())
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}
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pub fn run_pass(filename: &str) {
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if let Err(err) = build(filename) {
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panic!("pass test failed:\n{:?}", err);
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}
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}
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pub fn run_fail(filename: &str) {
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match build(filename) {
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Ok(_) => panic!("test {} passed unexpectedly", filename),
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Err(err) => {
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// Log the actual errors for use with `cargo test -- --nocapture`
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println!("failed, as expected:\n{:?}", err);
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}
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}
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}
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fn build_and_link_isle(isle_filename: &str) -> (tempfile::TempDir, std::path::PathBuf) {
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let tempdir = tempfile::tempdir().unwrap();
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let code = build(isle_filename).unwrap();
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let isle_filename_base = std::path::Path::new(isle_filename)
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.file_stem()
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.unwrap()
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.to_str()
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.unwrap()
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.to_string();
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let isle_generated_code = tempdir
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.path()
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.to_path_buf()
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.join(isle_filename_base.clone() + ".rs");
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std::fs::write(isle_generated_code, code).unwrap();
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let rust_filename = isle_filename.replace(".isle", "").to_string() + "_main.rs";
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let rust_filename_base = std::path::Path::new(&rust_filename).file_name().unwrap();
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let rust_driver = tempdir.path().to_path_buf().join(&rust_filename_base);
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println!("copying {} to {:?}", rust_filename, rust_driver);
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std::fs::copy(&rust_filename, &rust_driver).unwrap();
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let output = tempdir.path().to_path_buf().join("out");
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let mut rustc = std::process::Command::new("rustc")
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.arg(&rust_driver)
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.arg("-o")
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.arg(output.clone())
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.spawn()
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.unwrap();
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assert!(rustc.wait().unwrap().success());
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(tempdir, output)
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}
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pub fn run_link(isle_filename: &str) {
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build_and_link_isle(isle_filename);
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}
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pub fn run_run(isle_filename: &str) {
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let (_tempdir, exe) = build_and_link_isle(isle_filename);
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assert!(std::process::Command::new(exe)
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.spawn()
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.unwrap()
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.wait()
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.unwrap()
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.success());
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}
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// Generated by build.rs.
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include!(concat!(env!("OUT_DIR"), "/isle_tests.rs"));
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