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Auto merge of rust-lang#127096 - matthiaskrgr:rollup-kh7e0rh, r=matth…
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Rollup of 11 pull requests

Successful merges:

 - rust-lang#123714 (Add test for fn pointer duplication.)
 - rust-lang#124091 (Update AST validation module docs)
 - rust-lang#127015 (Switch back `non_local_definitions` lint to allow-by-default)
 - rust-lang#127016 (docs: check if the disambiguator matches its suffix)
 - rust-lang#127029 (Fix Markdown tables in platform-support.md)
 - rust-lang#127032 (Enable const casting for `f16` and `f128`)
 - rust-lang#127055 (Mark Hasher::finish as #[must_use])
 - rust-lang#127068 (Stall computing instance for drop shim until it has no unsubstituted const params)
 - rust-lang#127070 (add () to the marker_impls macro for ConstParamTy)
 - rust-lang#127071 (Remove (deprecated & unstable) {to,from}_bits pointer methods)
 - rust-lang#127078 (Enable full tools and profiler for LoongArch Linux targets)

r? `@ghost`
`@rustbot` modify labels: rollup
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bors committed Jun 29, 2024
2 parents 9ed2ab3 + f37272d commit 2eb6511
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24 changes: 17 additions & 7 deletions compiler/rustc_ast_passes/src/ast_validation.rs
Original file line number Diff line number Diff line change
@@ -1,10 +1,20 @@
// Validate AST before lowering it to HIR.
//
// This pass is supposed to catch things that fit into AST data structures,
// but not permitted by the language. It runs after expansion when AST is frozen,
// so it can check for erroneous constructions produced by syntax extensions.
// This pass is supposed to perform only simple checks not requiring name resolution
// or type checking or some other kind of complex analysis.
//! Validate AST before lowering it to HIR.
//!
//! This pass intends to check that the constructed AST is *syntactically valid* to allow the rest
//! of the compiler to assume that the AST is valid. These checks cannot be performed during parsing
//! because attribute macros are allowed to accept certain pieces of invalid syntax such as a
//! function without body outside of a trait definition:
//!
//! ```ignore (illustrative)
//! #[my_attribute]
//! mod foo {
//! fn missing_body();
//! }
//! ```
//!
//! These checks are run post-expansion, after AST is frozen, to be able to check for erroneous
//! constructions produced by proc macros. This pass is only intended for simple checks that do not
//! require name resolution or type checking, or other kinds of complex analysis.

use itertools::{Either, Itertools};
use rustc_ast::ptr::P;
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27 changes: 17 additions & 10 deletions compiler/rustc_const_eval/src/interpret/cast.rs
Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
use std::assert_matches::assert_matches;

use rustc_apfloat::ieee::{Double, Single};
use rustc_apfloat::ieee::{Double, Half, Quad, Single};
use rustc_apfloat::{Float, FloatConvert};
use rustc_middle::mir::interpret::{InterpResult, PointerArithmetic, Scalar};
use rustc_middle::mir::CastKind;
Expand Down Expand Up @@ -187,10 +187,10 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
bug!("FloatToFloat/FloatToInt cast: source type {} is not a float type", src.layout.ty)
};
let val = match fty {
FloatTy::F16 => unimplemented!("f16_f128"),
FloatTy::F16 => self.cast_from_float(src.to_scalar().to_f16()?, cast_to.ty),
FloatTy::F32 => self.cast_from_float(src.to_scalar().to_f32()?, cast_to.ty),
FloatTy::F64 => self.cast_from_float(src.to_scalar().to_f64()?, cast_to.ty),
FloatTy::F128 => unimplemented!("f16_f128"),
FloatTy::F128 => self.cast_from_float(src.to_scalar().to_f128()?, cast_to.ty),
};
Ok(ImmTy::from_scalar(val, cast_to))
}
Expand Down Expand Up @@ -296,18 +296,18 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
Float(fty) if signed => {
let v = v as i128;
match fty {
FloatTy::F16 => unimplemented!("f16_f128"),
FloatTy::F16 => Scalar::from_f16(Half::from_i128(v).value),
FloatTy::F32 => Scalar::from_f32(Single::from_i128(v).value),
FloatTy::F64 => Scalar::from_f64(Double::from_i128(v).value),
FloatTy::F128 => unimplemented!("f16_f128"),
FloatTy::F128 => Scalar::from_f128(Quad::from_i128(v).value),
}
}
// unsigned int -> float
Float(fty) => match fty {
FloatTy::F16 => unimplemented!("f16_f128"),
FloatTy::F16 => Scalar::from_f16(Half::from_u128(v).value),
FloatTy::F32 => Scalar::from_f32(Single::from_u128(v).value),
FloatTy::F64 => Scalar::from_f64(Double::from_u128(v).value),
FloatTy::F128 => unimplemented!("f16_f128"),
FloatTy::F128 => Scalar::from_f128(Quad::from_u128(v).value),
},

// u8 -> char
Expand All @@ -321,7 +321,12 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
/// Low-level cast helper function. Converts an apfloat `f` into int or float types.
fn cast_from_float<F>(&self, f: F, dest_ty: Ty<'tcx>) -> Scalar<M::Provenance>
where
F: Float + Into<Scalar<M::Provenance>> + FloatConvert<Single> + FloatConvert<Double>,
F: Float
+ Into<Scalar<M::Provenance>>
+ FloatConvert<Half>
+ FloatConvert<Single>
+ FloatConvert<Double>
+ FloatConvert<Quad>,
{
use rustc_type_ir::TyKind::*;

Expand Down Expand Up @@ -358,10 +363,12 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
}
// float -> float
Float(fty) => match fty {
FloatTy::F16 => unimplemented!("f16_f128"),
FloatTy::F16 => Scalar::from_f16(adjust_nan(self, f, f.convert(&mut false).value)),
FloatTy::F32 => Scalar::from_f32(adjust_nan(self, f, f.convert(&mut false).value)),
FloatTy::F64 => Scalar::from_f64(adjust_nan(self, f, f.convert(&mut false).value)),
FloatTy::F128 => unimplemented!("f16_f128"),
FloatTy::F128 => {
Scalar::from_f128(adjust_nan(self, f, f.convert(&mut false).value))
}
},
// That's it.
_ => span_bug!(self.cur_span(), "invalid float to {} cast", dest_ty),
Expand Down
2 changes: 1 addition & 1 deletion compiler/rustc_lint/src/non_local_def.rs
Original file line number Diff line number Diff line change
Expand Up @@ -50,7 +50,7 @@ declare_lint! {
/// All nested bodies (functions, enum discriminant, array length, consts) (expect for
/// `const _: Ty = { ... }` in top-level module, which is still undecided) are checked.
pub NON_LOCAL_DEFINITIONS,
Warn,
Allow,
"checks for non-local definitions",
report_in_external_macro
}
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12 changes: 11 additions & 1 deletion compiler/rustc_mir_transform/src/inline.rs
Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,7 @@ use rustc_middle::middle::codegen_fn_attrs::{CodegenFnAttrFlags, CodegenFnAttrs}
use rustc_middle::mir::visit::*;
use rustc_middle::mir::*;
use rustc_middle::ty::TypeVisitableExt;
use rustc_middle::ty::{self, Instance, InstanceKind, ParamEnv, Ty, TyCtxt};
use rustc_middle::ty::{self, Instance, InstanceKind, ParamEnv, Ty, TyCtxt, TypeFlags};
use rustc_session::config::{DebugInfo, OptLevel};
use rustc_span::source_map::Spanned;
use rustc_span::sym;
Expand Down Expand Up @@ -306,6 +306,16 @@ impl<'tcx> Inliner<'tcx> {
InstanceKind::Intrinsic(_) | InstanceKind::Virtual(..) => {
return Err("instance without MIR (intrinsic / virtual)");
}

// FIXME(#127030): `ConstParamHasTy` has bad interactions with
// the drop shim builder, which does not evaluate predicates in
// the correct param-env for types being dropped. Stall resolving
// the MIR for this instance until all of its const params are
// substituted.
InstanceKind::DropGlue(_, Some(ty)) if ty.has_type_flags(TypeFlags::HAS_CT_PARAM) => {
return Err("still needs substitution");
}

// This cannot result in an immediate cycle since the callee MIR is a shim, which does
// not get any optimizations run on it. Any subsequent inlining may cause cycles, but we
// do not need to catch this here, we can wait until the inliner decides to continue
Expand Down
1 change: 1 addition & 0 deletions library/core/src/hash/mod.rs
Original file line number Diff line number Diff line change
Expand Up @@ -334,6 +334,7 @@ pub trait Hasher {
///
/// [`write`]: Hasher::write
#[stable(feature = "rust1", since = "1.0.0")]
#[must_use]
fn finish(&self) -> u64;

/// Writes some data into this `Hasher`.
Expand Down
5 changes: 1 addition & 4 deletions library/core/src/marker.rs
Original file line number Diff line number Diff line change
Expand Up @@ -996,15 +996,12 @@ marker_impls! {
bool,
char,
str /* Technically requires `[u8]: ConstParamTy` */,
(),
{T: ConstParamTy, const N: usize} [T; N],
{T: ConstParamTy} [T],
{T: ?Sized + ConstParamTy} &T,
}

// FIXME(adt_const_params): Add to marker_impls call above once not in bootstrap
#[unstable(feature = "adt_const_params", issue = "95174")]
impl ConstParamTy for () {}

/// A common trait implemented by all function pointers.
#[unstable(
feature = "fn_ptr_trait",
Expand Down
65 changes: 0 additions & 65 deletions library/core/src/ptr/const_ptr.rs
Original file line number Diff line number Diff line change
Expand Up @@ -112,71 +112,6 @@ impl<T: ?Sized> *const T {
self as _
}

/// Casts a pointer to its raw bits.
///
/// This is equivalent to `as usize`, but is more specific to enhance readability.
/// The inverse method is [`from_bits`](#method.from_bits).
///
/// In particular, `*p as usize` and `p as usize` will both compile for
/// pointers to numeric types but do very different things, so using this
/// helps emphasize that reading the bits was intentional.
///
/// # Examples
///
/// ```
/// #![feature(ptr_to_from_bits)]
/// # #[cfg(not(miri))] { // doctest does not work with strict provenance
/// let array = [13, 42];
/// let p0: *const i32 = &array[0];
/// assert_eq!(<*const _>::from_bits(p0.to_bits()), p0);
/// let p1: *const i32 = &array[1];
/// assert_eq!(p1.to_bits() - p0.to_bits(), 4);
/// # }
/// ```
#[unstable(feature = "ptr_to_from_bits", issue = "91126")]
#[deprecated(
since = "1.67.0",
note = "replaced by the `expose_provenance` method, or update your code \
to follow the strict provenance rules using its APIs"
)]
#[inline(always)]
pub fn to_bits(self) -> usize
where
T: Sized,
{
self as usize
}

/// Creates a pointer from its raw bits.
///
/// This is equivalent to `as *const T`, but is more specific to enhance readability.
/// The inverse method is [`to_bits`](#method.to_bits).
///
/// # Examples
///
/// ```
/// #![feature(ptr_to_from_bits)]
/// # #[cfg(not(miri))] { // doctest does not work with strict provenance
/// use std::ptr::NonNull;
/// let dangling: *const u8 = NonNull::dangling().as_ptr();
/// assert_eq!(<*const u8>::from_bits(1), dangling);
/// # }
/// ```
#[unstable(feature = "ptr_to_from_bits", issue = "91126")]
#[deprecated(
since = "1.67.0",
note = "replaced by the `ptr::with_exposed_provenance` function, or update \
your code to follow the strict provenance rules using its APIs"
)]
#[allow(fuzzy_provenance_casts)] // this is an unstable and semi-deprecated cast function
#[inline(always)]
pub fn from_bits(bits: usize) -> Self
where
T: Sized,
{
bits as Self
}

/// Gets the "address" portion of the pointer.
///
/// This is similar to `self as usize`, which semantically discards *provenance* and
Expand Down
66 changes: 0 additions & 66 deletions library/core/src/ptr/mut_ptr.rs
Original file line number Diff line number Diff line change
Expand Up @@ -117,72 +117,6 @@ impl<T: ?Sized> *mut T {
self as _
}

/// Casts a pointer to its raw bits.
///
/// This is equivalent to `as usize`, but is more specific to enhance readability.
/// The inverse method is [`from_bits`](pointer#method.from_bits-1).
///
/// In particular, `*p as usize` and `p as usize` will both compile for
/// pointers to numeric types but do very different things, so using this
/// helps emphasize that reading the bits was intentional.
///
/// # Examples
///
/// ```
/// #![feature(ptr_to_from_bits)]
/// # #[cfg(not(miri))] { // doctest does not work with strict provenance
/// let mut array = [13, 42];
/// let mut it = array.iter_mut();
/// let p0: *mut i32 = it.next().unwrap();
/// assert_eq!(<*mut _>::from_bits(p0.to_bits()), p0);
/// let p1: *mut i32 = it.next().unwrap();
/// assert_eq!(p1.to_bits() - p0.to_bits(), 4);
/// }
/// ```
#[unstable(feature = "ptr_to_from_bits", issue = "91126")]
#[deprecated(
since = "1.67.0",
note = "replaced by the `expose_provenance` method, or update your code \
to follow the strict provenance rules using its APIs"
)]
#[inline(always)]
pub fn to_bits(self) -> usize
where
T: Sized,
{
self as usize
}

/// Creates a pointer from its raw bits.
///
/// This is equivalent to `as *mut T`, but is more specific to enhance readability.
/// The inverse method is [`to_bits`](pointer#method.to_bits-1).
///
/// # Examples
///
/// ```
/// #![feature(ptr_to_from_bits)]
/// # #[cfg(not(miri))] { // doctest does not work with strict provenance
/// use std::ptr::NonNull;
/// let dangling: *mut u8 = NonNull::dangling().as_ptr();
/// assert_eq!(<*mut u8>::from_bits(1), dangling);
/// }
/// ```
#[unstable(feature = "ptr_to_from_bits", issue = "91126")]
#[deprecated(
since = "1.67.0",
note = "replaced by the `ptr::with_exposed_provenance_mut` function, or \
update your code to follow the strict provenance rules using its APIs"
)]
#[allow(fuzzy_provenance_casts)] // this is an unstable and semi-deprecated cast function
#[inline(always)]
pub fn from_bits(bits: usize) -> Self
where
T: Sized,
{
bits as Self
}

/// Gets the "address" portion of the pointer.
///
/// This is similar to `self as usize`, which semantically discards *provenance* and
Expand Down
7 changes: 6 additions & 1 deletion src/ci/docker/host-x86_64/dist-loongarch64-linux/Dockerfile
Original file line number Diff line number Diff line change
Expand Up @@ -25,5 +25,10 @@ ENV CC_loongarch64_unknown_linux_gnu=loongarch64-unknown-linux-gnu-gcc \

ENV HOSTS=loongarch64-unknown-linux-gnu

ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
ENV RUST_CONFIGURE_ARGS \
--enable-extended \
--enable-full-tools \
--enable-profiler \
--disable-docs

ENV SCRIPT python3 ../x.py dist --host $HOSTS --target $HOSTS
3 changes: 2 additions & 1 deletion src/ci/docker/host-x86_64/dist-loongarch64-musl/Dockerfile
Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,8 @@ ENV HOSTS=loongarch64-unknown-linux-musl

ENV RUST_CONFIGURE_ARGS \
--enable-extended \
--enable-lld \
--enable-full-tools \
--enable-profiler \
--disable-docs \
--set target.loongarch64-unknown-linux-musl.crt-static=false \
--musl-root-loongarch64=/x-tools/loongarch64-unknown-linux-musl/loongarch64-unknown-linux-musl/sysroot/usr
Expand Down
8 changes: 4 additions & 4 deletions src/doc/rustc/src/platform-support.md
Original file line number Diff line number Diff line change
Expand Up @@ -168,12 +168,12 @@ target | std | notes
`i686-unknown-freebsd` | ✓ | 32-bit FreeBSD [^x86_32-floats-return-ABI]
`i686-unknown-linux-musl` | ✓ | 32-bit Linux with musl 1.2.3 [^x86_32-floats-return-ABI]
[`i686-unknown-uefi`](platform-support/unknown-uefi.md) | ? | 32-bit UEFI
[`loongarch64-unknown-none`](platform-support/loongarch-none.md) | * | | LoongArch64 Bare-metal (LP64D ABI)
[`loongarch64-unknown-none-softfloat`](platform-support/loongarch-none.md) | * | | LoongArch64 Bare-metal (LP64S ABI)
[`loongarch64-unknown-none`](platform-support/loongarch-none.md) | * | LoongArch64 Bare-metal (LP64D ABI)
[`loongarch64-unknown-none-softfloat`](platform-support/loongarch-none.md) | * | LoongArch64 Bare-metal (LP64S ABI)
[`nvptx64-nvidia-cuda`](platform-support/nvptx64-nvidia-cuda.md) | * | --emit=asm generates PTX code that [runs on NVIDIA GPUs]
[`riscv32imac-unknown-none-elf`](platform-support/riscv32-unknown-none-elf.md) | * | Bare RISC-V (RV32IMAC ISA)
[`riscv32i-unknown-none-elf`](platform-support/riscv32-unknown-none-elf.md) | * | Bare RISC-V (RV32I ISA)
[`riscv32im-unknown-none-elf`](platform-support/riscv32-unknown-none-elf.md) | * | | Bare RISC-V (RV32IM ISA)
[`riscv32im-unknown-none-elf`](platform-support/riscv32-unknown-none-elf.md) | * | Bare RISC-V (RV32IM ISA)
[`riscv32imc-unknown-none-elf`](platform-support/riscv32-unknown-none-elf.md) | * | Bare RISC-V (RV32IMC ISA)
[`riscv32imafc-unknown-none-elf`](platform-support/riscv32-unknown-none-elf.md) | * | Bare RISC-V (RV32IMAFC ISA)
`riscv64gc-unknown-none-elf` | * | Bare RISC-V (RV64IMAFDC ISA)
Expand All @@ -193,7 +193,7 @@ target | std | notes
`wasm32-unknown-unknown` | ✓ | WebAssembly
`wasm32-wasi` | ✓ | WebAssembly with WASI (undergoing a [rename to `wasm32-wasip1`][wasi-rename])
[`wasm32-wasip1`](platform-support/wasm32-wasip1.md) | ✓ | WebAssembly with WASI
[`wasm32-wasip1-threads`](platform-support/wasm32-wasip1-threads.md) | ✓ | | WebAssembly with WASI Preview 1 and threads
[`wasm32-wasip1-threads`](platform-support/wasm32-wasip1-threads.md) | ✓ | WebAssembly with WASI Preview 1 and threads
[`x86_64-apple-ios`](platform-support/apple-ios.md) | ✓ | 64-bit x86 iOS
[`x86_64-fortanix-unknown-sgx`](platform-support/x86_64-fortanix-unknown-sgx.md) | ✓ | [Fortanix ABI] for 64-bit Intel SGX
`x86_64-fuchsia` | ✓ | Alias for `x86_64-unknown-fuchsia`
Expand Down
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