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// run-pass
// Test StableMIR behavior when different results are given
// ignore-stage1
// ignore-cross-compile
// ignore-remote
// edition: 2021
#![feature(rustc_private)]
#![feature(assert_matches)]
extern crate rustc_middle;
extern crate rustc_smir;
extern crate stable_mir;
use rustc_middle::ty::TyCtxt;
use rustc_smir::rustc_internal;
use std::io::Write;
use std::ops::ControlFlow;
/// This test will generate and analyze a dummy crate using the stable mir.
/// For that, it will first write the dummy crate into a file.
/// Then it will create a `StableMir` using custom arguments and then
/// it will run the compiler.
fn main() {
let path = "input_compilation_result_test.rs";
generate_input(&path).unwrap();
let args = vec!["rustc".to_string(), path.to_string()];
test_continue(args.clone());
test_break(args.clone());
test_failed(args.clone());
test_skipped(args);
}
fn test_continue(args: Vec<String>) {
let continue_fn = |_: TyCtxt| ControlFlow::Continue::<(), bool>(true);
let result = rustc_internal::StableMir::new(args, continue_fn).run();
assert_eq!(result, Ok(true));
}
fn test_break(args: Vec<String>) {
let continue_fn = |_: TyCtxt| ControlFlow::Break::<bool, i32>(false);
let result = rustc_internal::StableMir::new(args, continue_fn).run();
assert_eq!(result, Err(stable_mir::CompilerError::Interrupted(false)));
}
fn test_skipped(mut args: Vec<String>) {
args.push("--version".to_string());
let unreach_fn = |_: TyCtxt| -> ControlFlow<()> { unreachable!() };
let result = rustc_internal::StableMir::new(args, unreach_fn).run();
assert_eq!(result, Err(stable_mir::CompilerError::Skipped));
}
fn test_failed(mut args: Vec<String>) {
args.push("--cfg=broken".to_string());
let unreach_fn = |_: TyCtxt| -> ControlFlow<()> { unreachable!() };
let result = rustc_internal::StableMir::new(args, unreach_fn).run();
assert_eq!(result, Err(stable_mir::CompilerError::CompilationFailed));
}
fn generate_input(path: &str) -> std::io::Result<()> {
let mut file = std::fs::File::create(path)?;
write!(
file,
r#"
// This should trigger a compilation failure when enabled.
#[cfg(broken)]
mod broken_mod {{
fn call_invalid() {{
invalid_fn();
}}
}}
fn main() {{}}
"#
)?;
Ok(())
}
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