bjoernager/rust
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Split the "raw integer bytes" part out of Scalar

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Oliver Scherer 2020-09-26 15:15:35 +02:00 • committed by oli
parent 8a18963f28
commit 6fdbde5f46
1 changed files with 9 additions and 8 deletions
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17
clippy_lints/src/consts.rs
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@ -8,8 +8,9 @@ use rustc_hir::def::{DefKind, Res};
use rustc_hir::{BinOp, BinOpKind, Block, Expr, ExprKind, HirId, QPath, UnOp}; use rustc_hir::{BinOp, BinOpKind, Block, Expr, ExprKind, HirId, QPath, UnOp};
use rustc_lint::LateContext; use rustc_lint::LateContext;
use rustc_middle::ty::subst::{Subst, SubstsRef}; use rustc_middle::ty::subst::{Subst, SubstsRef};
use rustc_middle::ty::{self, Ty, TyCtxt}; use rustc_middle::ty::{self, Ty, TyCtxt, ScalarInt};
use rustc_middle::{bug, span_bug}; use rustc_middle::{bug, span_bug};
use rustc_middle::mir::interpret::Scalar;
use rustc_span::symbol::Symbol; use rustc_span::symbol::Symbol;
use std::cmp::Ordering::{self, Equal}; use std::cmp::Ordering::{self, Equal};
use std::convert::TryInto; use std::convert::TryInto;
@ -500,21 +501,21 @@ impl<'a, 'tcx> ConstEvalLateContext<'a, 'tcx> {
} }
pub fn miri_to_const(result: &ty::Const<'_>) -> Option<Constant> { pub fn miri_to_const(result: &ty::Const<'_>) -> Option<Constant> {
use rustc_middle::mir::interpret::{ConstValue, Scalar}; use rustc_middle::mir::interpret::{ConstValue};
match result.val { match result.val {
ty::ConstKind::Value(ConstValue::Scalar(Scalar::Raw { data: d, .. })) => { ty::ConstKind::Value(ConstValue::Scalar(Scalar::Raw(int))) => {
match result.ty.kind() { match result.ty.kind() {
ty::Bool => Some(Constant::Bool(d == 1)), ty::Bool => Some(Constant::Bool(int == ScalarInt::TRUE)),
ty::Uint(_) | ty::Int(_) => Some(Constant::Int(d)), ty::Uint(_) | ty::Int(_) => Some(Constant::Int(int.assert_bits(int.size()))),
ty::Float(FloatTy::F32) => Some(Constant::F32(f32::from_bits( ty::Float(FloatTy::F32) => Some(Constant::F32(f32::from_bits(
d.try_into().expect("invalid f32 bit representation"), int.try_into().expect("invalid f32 bit representation"),
))), ))),
ty::Float(FloatTy::F64) => Some(Constant::F64(f64::from_bits( ty::Float(FloatTy::F64) => Some(Constant::F64(f64::from_bits(
d.try_into().expect("invalid f64 bit representation"), int.try_into().expect("invalid f64 bit representation"),
))), ))),
ty::RawPtr(type_and_mut) => { ty::RawPtr(type_and_mut) => {
if let ty::Uint(_) = type_and_mut.ty.kind() { if let ty::Uint(_) = type_and_mut.ty.kind() {
return Some(Constant::RawPtr(d)); return Some(Constant::RawPtr(int.assert_bits(int.size())));
} }
None None
}, },