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Encode ScalarInt::bytes as u128 instead of [u8; 16] to see if that caused the performance regression

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This commit is contained in:
Oliver Scherer 2020-10-01 09:47:36 +02:00 committed by oli
parent 362123dd75
commit eac309984f
1 changed files with 15 additions and 1 deletions
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16
compiler/rustc_middle/src/ty/consts/int.rs
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@ -3,6 +3,7 @@ use crate::throw_ub;
use rustc_apfloat::ieee::{Double, Single};
use rustc_apfloat::Float;
use rustc_macros::HashStable;
use rustc_serialize::{Decodable, Decoder, Encodable, Encoder};
use rustc_target::abi::{Size, TargetDataLayout};
use std::convert::{TryFrom, TryInto};
use std::fmt;
@ -115,7 +116,7 @@ impl std::fmt::Debug for ConstInt {
// FIXME: reuse in `super::int::ConstInt` and `Scalar::Bits`
/// The raw bytes of a simple value.
#[derive(Clone, Copy, Eq, PartialEq, Ord, PartialOrd, TyEncodable, TyDecodable, Hash)]
#[derive(Clone, Copy, Eq, PartialEq, Ord, PartialOrd, Hash)]
#[derive(HashStable)]
pub struct ScalarInt {
/// The first `size` bytes of `data` are the value.
@ -127,6 +128,19 @@ pub struct ScalarInt {
size: u8,
}
impl<S: Encoder> Encodable<S> for ScalarInt {
fn encode(&self, s: &mut S) -> Result<(), S::Error> {
s.emit_u128(self.data())?;
s.emit_u8(self.size)
}
}
impl<D: Decoder> Decodable<D> for ScalarInt {
fn decode(d: &mut D) -> Result<ScalarInt, D::Error> {
Ok(ScalarInt { bytes: d.read_u128()?.to_ne_bytes(), size: d.read_u8()? })
}
}
impl ScalarInt {
pub const TRUE: ScalarInt = ScalarInt { bytes: 1_u128.to_ne_bytes(), size: 1 };