blob: 3b52d88de3cdfc71c00d9d0028db5c8a437ecc71 [file] [log] [blame]
//@ run-pass
//! Test information regarding binary operations.
//@ ignore-stage1
//@ ignore-cross-compile
//@ ignore-remote
//@ ignore-windows-gnu mingw has troubles with linking https://github.com/rust-lang/rust/pull/116837
#![feature(rustc_private)]
extern crate rustc_hir;
#[macro_use]
extern crate rustc_smir;
extern crate rustc_driver;
extern crate rustc_interface;
extern crate stable_mir;
use rustc_smir::rustc_internal;
use stable_mir::mir::mono::Instance;
use stable_mir::mir::visit::{Location, MirVisitor};
use stable_mir::mir::{LocalDecl, Rvalue, Statement, StatementKind, Terminator, TerminatorKind};
use stable_mir::ty::{RigidTy, TyKind};
use std::collections::HashSet;
use std::convert::TryFrom;
use std::io::Write;
use std::ops::ControlFlow;
/// This function tests that we can correctly get type information from binary operations.
fn test_binops() -> ControlFlow<()> {
// Find items in the local crate.
let items = stable_mir::all_local_items();
let mut instances =
items.into_iter().map(|item| Instance::try_from(item).unwrap()).collect::<Vec<_>>();
while let Some(instance) = instances.pop() {
// The test below shouldn't have recursion in it.
let Some(body) = instance.body() else {
continue;
};
let mut visitor = Visitor { locals: body.locals(), calls: Default::default() };
visitor.visit_body(&body);
instances.extend(visitor.calls.into_iter());
}
ControlFlow::Continue(())
}
struct Visitor<'a> {
locals: &'a [LocalDecl],
calls: HashSet<Instance>,
}
impl<'a> MirVisitor for Visitor<'a> {
fn visit_statement(&mut self, stmt: &Statement, _loc: Location) {
match &stmt.kind {
StatementKind::Assign(place, Rvalue::BinaryOp(op, rhs, lhs)) => {
let ret_ty = place.ty(self.locals).unwrap();
let op_ty = op.ty(rhs.ty(self.locals).unwrap(), lhs.ty(self.locals).unwrap());
assert_eq!(ret_ty, op_ty, "Operation type should match the assigned place type");
}
_ => {}
}
}
fn visit_terminator(&mut self, term: &Terminator, _loc: Location) {
match &term.kind {
TerminatorKind::Call { func, .. } => {
let TyKind::RigidTy(RigidTy::FnDef(def, args)) =
func.ty(self.locals).unwrap().kind()
else {
return;
};
self.calls.insert(Instance::resolve(def, &args).unwrap());
}
_ => {}
}
}
}
/// 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 = "binop_input.rs";
generate_input(&path).unwrap();
let args = vec!["rustc".to_string(), "--crate-type=lib".to_string(), path.to_string()];
run!(args, test_binops).unwrap();
}
fn generate_input(path: &str) -> std::io::Result<()> {
let mut file = std::fs::File::create(path)?;
write!(
file,
r#"
macro_rules! binop_int {{
($fn:ident, $typ:ty) => {{
pub fn $fn(lhs: $typ, rhs: $typ) {{
let eq = lhs == rhs;
let lt = lhs < rhs;
let le = lhs <= rhs;
let sum = lhs + rhs;
let mult = lhs * sum;
let shift = mult << 2;
let bit_or = shift | rhs;
let cmp = lhs.cmp(&bit_or);
// Try to avoid the results above being pruned
std::hint::black_box(((eq, lt, le), cmp));
}}
}}
}}
binop_int!(binop_u8, u8);
binop_int!(binop_i64, i64);
pub fn binop_bool(lhs: bool, rhs: bool) {{
let eq = lhs == rhs;
let or = lhs | eq;
let lt = lhs < or;
let cmp = lhs.cmp(&rhs);
// Try to avoid the results above being pruned
std::hint::black_box((lt, cmp));
}}
pub fn binop_char(lhs: char, rhs: char) {{
let eq = lhs == rhs;
let lt = lhs < rhs;
let cmp = lhs.cmp(&rhs);
// Try to avoid the results above being pruned
std::hint::black_box(([eq, lt], cmp));
}}
pub fn binop_ptr(lhs: *const char, rhs: *const char) {{
let eq = lhs == rhs;
let lt = lhs < rhs;
let cmp = lhs.cmp(&rhs);
let off = unsafe {{ lhs.offset(2) }};
// Try to avoid the results above being pruned
std::hint::black_box(([eq, lt], cmp, off));
}}
"#
)?;
Ok(())
}