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Erased numeric type to reduce branching

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Taylor Cramer 2016-03-28 21:38:54 -07:00 committed by mcarton
parent 106ae7da44
commit d52d23d662
1 changed files with 2 additions and 13 deletions
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15
src/types.rs
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@ -873,21 +873,10 @@ fn node_as_const_fullint(cx: &LateContext, expr: &Expr) -> Option<FullInt> {
match const_eval::eval_const_expr_partial(cx.tcx, expr, ExprTypeChecked, None) { match const_eval::eval_const_expr_partial(cx.tcx, expr, ExprTypeChecked, None) {
Ok(val) => { Ok(val) => {
if let Integral(const_int) = val { if let Integral(const_int) = val {
Some(match const_int { Some(match const_int.erase_type() {
I8(x) => FullInt::S(x as i64),
I16(x) => FullInt::S(x as i64),
I32(x) => FullInt::S(x as i64),
Isize(Is32(x)) => FullInt::S(x as i64),
Isize(Is64(x)) |
I64(x) => FullInt::S(x),
InferSigned(x) => FullInt::S(x as i64), InferSigned(x) => FullInt::S(x as i64),
U8(x) => FullInt::U(x as u64),
U16(x) => FullInt::U(x as u64),
U32(x) => FullInt::U(x as u64),
Usize(Us32(x)) => FullInt::U(x as u64),
Usize(Us64(x)) |
U64(x) => FullInt::U(x),
Infer(x) => FullInt::U(x as u64), Infer(x) => FullInt::U(x as u64),
_ => unreachable!(),
}) })
} else { } else {
None None