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-rw-r--r--compiler/rustc_middle/src/mir/interpret/value.rs163
1 files changed, 7 insertions, 156 deletions
diff --git a/compiler/rustc_middle/src/mir/interpret/value.rs b/compiler/rustc_middle/src/mir/interpret/value.rs
index 834c114ee..ac5fddb7a 100644
--- a/compiler/rustc_middle/src/mir/interpret/value.rs
+++ b/compiler/rustc_middle/src/mir/interpret/value.rs
@@ -8,7 +8,7 @@ use rustc_apfloat::{
use rustc_macros::HashStable;
use rustc_target::abi::{HasDataLayout, Size};
-use crate::ty::{Lift, ParamEnv, ScalarInt, Ty, TyCtxt};
+use crate::ty::{ParamEnv, ScalarInt, Ty, TyCtxt};
use super::{
AllocId, AllocRange, ConstAllocation, InterpResult, Pointer, PointerArithmetic, Provenance,
@@ -27,7 +27,7 @@ pub struct ConstAlloc<'tcx> {
/// Represents a constant value in Rust. `Scalar` and `Slice` are optimizations for
/// array length computations, enum discriminants and the pattern matching logic.
#[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Ord, TyEncodable, TyDecodable, Hash)]
-#[derive(HashStable)]
+#[derive(HashStable, Lift)]
pub enum ConstValue<'tcx> {
/// Used only for types with `layout::abi::Scalar` ABI.
///
@@ -53,22 +53,6 @@ pub enum ConstValue<'tcx> {
#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
static_assert_size!(ConstValue<'_>, 32);
-impl<'a, 'tcx> Lift<'tcx> for ConstValue<'a> {
- type Lifted = ConstValue<'tcx>;
- fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<ConstValue<'tcx>> {
- Some(match self {
- ConstValue::Scalar(s) => ConstValue::Scalar(s),
- ConstValue::ZeroSized => ConstValue::ZeroSized,
- ConstValue::Slice { data, start, end } => {
- ConstValue::Slice { data: tcx.lift(data)?, start, end }
- }
- ConstValue::ByRef { alloc, offset } => {
- ConstValue::ByRef { alloc: tcx.lift(alloc)?, offset }
- }
- })
- }
-}
-
impl<'tcx> ConstValue<'tcx> {
#[inline]
pub fn try_to_scalar(&self) -> Option<Scalar<AllocId>> {
@@ -79,7 +63,7 @@ impl<'tcx> ConstValue<'tcx> {
}
pub fn try_to_scalar_int(&self) -> Option<ScalarInt> {
- Some(self.try_to_scalar()?.assert_int())
+ self.try_to_scalar()?.try_to_int().ok()
}
pub fn try_to_bits(&self, size: Size) -> Option<u128> {
@@ -130,9 +114,7 @@ pub enum Scalar<Prov = AllocId> {
/// The raw bytes of a simple value.
Int(ScalarInt),
- /// A pointer into an `Allocation`. An `Allocation` in the `memory` module has a list of
- /// relocations, but a `Scalar` is only large enough to contain one, so we just represent the
- /// relocation and its associated offset together as a `Pointer` here.
+ /// A pointer.
///
/// We also store the size of the pointer, such that a `Scalar` always knows how big it is.
/// The size is always the pointer size of the current target, but this is not information
@@ -368,6 +350,7 @@ impl<'tcx, Prov: Provenance> Scalar<Prov> {
}
#[inline(always)]
+ #[cfg_attr(debug_assertions, track_caller)] // only in debug builds due to perf (see #98980)
pub fn assert_int(self) -> ScalarInt {
self.try_to_int().unwrap()
}
@@ -389,6 +372,7 @@ impl<'tcx, Prov: Provenance> Scalar<Prov> {
}
#[inline(always)]
+ #[cfg_attr(debug_assertions, track_caller)] // only in debug builds due to perf (see #98980)
pub fn assert_bits(self, target_size: Size) -> u128 {
self.to_bits(target_size).unwrap()
}
@@ -502,145 +486,12 @@ impl<'tcx, Prov: Provenance> Scalar<Prov> {
}
}
-#[derive(Clone, Copy, Eq, PartialEq, TyEncodable, TyDecodable, HashStable, Hash)]
-pub enum ScalarMaybeUninit<Prov = AllocId> {
- Scalar(Scalar<Prov>),
- Uninit,
-}
-
-#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
-static_assert_size!(ScalarMaybeUninit, 24);
-
-impl<Prov> From<Scalar<Prov>> for ScalarMaybeUninit<Prov> {
- #[inline(always)]
- fn from(s: Scalar<Prov>) -> Self {
- ScalarMaybeUninit::Scalar(s)
- }
-}
-
-// We want the `Debug` output to be readable as it is used by `derive(Debug)` for
-// all the Miri types.
-impl<Prov: Provenance> fmt::Debug for ScalarMaybeUninit<Prov> {
- fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
- match self {
- ScalarMaybeUninit::Uninit => write!(f, "<uninitialized>"),
- ScalarMaybeUninit::Scalar(s) => write!(f, "{:?}", s),
- }
- }
-}
-
-impl<Prov: Provenance> fmt::LowerHex for ScalarMaybeUninit<Prov> {
- fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
- match self {
- ScalarMaybeUninit::Uninit => write!(f, "uninitialized bytes"),
- ScalarMaybeUninit::Scalar(s) => write!(f, "{:x}", s),
- }
- }
-}
-
-impl<Prov> ScalarMaybeUninit<Prov> {
- #[inline]
- pub fn from_pointer(ptr: Pointer<Prov>, cx: &impl HasDataLayout) -> Self {
- ScalarMaybeUninit::Scalar(Scalar::from_pointer(ptr, cx))
- }
-
- #[inline]
- pub fn from_maybe_pointer(ptr: Pointer<Option<Prov>>, cx: &impl HasDataLayout) -> Self {
- ScalarMaybeUninit::Scalar(Scalar::from_maybe_pointer(ptr, cx))
- }
-
- #[inline]
- pub fn check_init<'tcx>(self) -> InterpResult<'tcx, Scalar<Prov>> {
- match self {
- ScalarMaybeUninit::Scalar(scalar) => Ok(scalar),
- ScalarMaybeUninit::Uninit => throw_ub!(InvalidUninitBytes(None)),
- }
- }
-}
-
-impl<'tcx, Prov: Provenance> ScalarMaybeUninit<Prov> {
- #[inline(always)]
- pub fn to_pointer(self, cx: &impl HasDataLayout) -> InterpResult<'tcx, Pointer<Option<Prov>>> {
- self.check_init()?.to_pointer(cx)
- }
-
- #[inline(always)]
- pub fn to_bool(self) -> InterpResult<'tcx, bool> {
- self.check_init()?.to_bool()
- }
-
- #[inline(always)]
- pub fn to_char(self) -> InterpResult<'tcx, char> {
- self.check_init()?.to_char()
- }
-
- #[inline(always)]
- pub fn to_f32(self) -> InterpResult<'tcx, Single> {
- self.check_init()?.to_f32()
- }
-
- #[inline(always)]
- pub fn to_f64(self) -> InterpResult<'tcx, Double> {
- self.check_init()?.to_f64()
- }
-
- #[inline(always)]
- pub fn to_u8(self) -> InterpResult<'tcx, u8> {
- self.check_init()?.to_u8()
- }
-
- #[inline(always)]
- pub fn to_u16(self) -> InterpResult<'tcx, u16> {
- self.check_init()?.to_u16()
- }
-
- #[inline(always)]
- pub fn to_u32(self) -> InterpResult<'tcx, u32> {
- self.check_init()?.to_u32()
- }
-
- #[inline(always)]
- pub fn to_u64(self) -> InterpResult<'tcx, u64> {
- self.check_init()?.to_u64()
- }
-
- #[inline(always)]
- pub fn to_machine_usize(self, cx: &impl HasDataLayout) -> InterpResult<'tcx, u64> {
- self.check_init()?.to_machine_usize(cx)
- }
-
- #[inline(always)]
- pub fn to_i8(self) -> InterpResult<'tcx, i8> {
- self.check_init()?.to_i8()
- }
-
- #[inline(always)]
- pub fn to_i16(self) -> InterpResult<'tcx, i16> {
- self.check_init()?.to_i16()
- }
-
- #[inline(always)]
- pub fn to_i32(self) -> InterpResult<'tcx, i32> {
- self.check_init()?.to_i32()
- }
-
- #[inline(always)]
- pub fn to_i64(self) -> InterpResult<'tcx, i64> {
- self.check_init()?.to_i64()
- }
-
- #[inline(always)]
- pub fn to_machine_isize(self, cx: &impl HasDataLayout) -> InterpResult<'tcx, i64> {
- self.check_init()?.to_machine_isize(cx)
- }
-}
-
/// Gets the bytes of a constant slice value.
pub fn get_slice_bytes<'tcx>(cx: &impl HasDataLayout, val: ConstValue<'tcx>) -> &'tcx [u8] {
if let ConstValue::Slice { data, start, end } = val {
let len = end - start;
data.inner()
- .get_bytes(
+ .get_bytes_strip_provenance(
cx,
AllocRange { start: Size::from_bytes(start), size: Size::from_bytes(len) },
)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 00:16:33 +0000