diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:03:36 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:03:36 +0000 |
commit | 17d40c6057c88f4c432b0d7bac88e1b84cb7e67f (patch) | |
tree | 3f66c4a5918660bb8a758ab6cda5ff8ee4f6cdcd /compiler/rustc_middle/src/mir/interpret/value.rs | |
parent | Adding upstream version 1.64.0+dfsg1. (diff) | |
download | rustc-f7f0cc2a5d72e2c61c1f6900e70eec992bea4273.tar.xz rustc-f7f0cc2a5d72e2c61c1f6900e70eec992bea4273.zip |
Adding upstream version 1.65.0+dfsg1.upstream/1.65.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | compiler/rustc_middle/src/mir/interpret/value.rs | 163 |
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) }, ) |