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Expand validator to be more precise on checked binary ops

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This commit is contained in:
Jakob Degen 2022-05-05 21:15:20 -04:00
parent e209e85e39
commit 5289bbece3
1 changed files with 41 additions and 3 deletions
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44
compiler/rustc_const_eval/src/transform/validate.rs
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@ -291,7 +291,7 @@ impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
ty::Array(..) | ty::Slice(..)
);
}
Rvalue::BinaryOp(op, vals) | Rvalue::CheckedBinaryOp(op, vals) => {
Rvalue::BinaryOp(op, vals) => {
use BinOp::*;
let a = vals.0.ty(&self.body.local_decls, self.tcx);
let b = vals.1.ty(&self.body.local_decls, self.tcx);
@ -355,19 +355,57 @@ impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
for x in [a, b] {
check_kinds!(
x,
"Cannot perform op on type {:?}",
"Cannot perform arithmetic on type {:?}",
ty::Uint(..) | ty::Int(..) | ty::Float(..)
)
}
if a != b {
self.fail(
location,
format!("Cannot perform op on unequal types {:?} and {:?}", a, b),
format!(
"Cannot perform arithmetic on unequal types {:?} and {:?}",
a, b
),
);
}
}
}
}
Rvalue::CheckedBinaryOp(op, vals) => {
use BinOp::*;
let a = vals.0.ty(&self.body.local_decls, self.tcx);
let b = vals.1.ty(&self.body.local_decls, self.tcx);
match op {
Add | Sub | Mul => {
for x in [a, b] {
check_kinds!(
x,
"Cannot perform checked arithmetic on type {:?}",
ty::Uint(..) | ty::Int(..)
)
}
if a != b {
self.fail(
location,
format!(
"Cannot perform checked arithmetic on unequal types {:?} and {:?}",
a, b
),
);
}
}
Shl | Shr => {
for x in [a, b] {
check_kinds!(
x,
"Cannot perform checked shift on non-integer type {:?}",
ty::Uint(..) | ty::Int(..)
)
}
}
_ => self.fail(location, format!("There is no checked version of {:?}", op)),
}
}
Rvalue::UnaryOp(op, operand) => {
let a = operand.ty(&self.body.local_decls, self.tcx);
match op {