rustc_target::abi

Struct TargetDataLayout

pub struct TargetDataLayout {
Show 17 fields
    pub endian: Endian,
    pub i1_align: AbiAndPrefAlign,
    pub i8_align: AbiAndPrefAlign,
    pub i16_align: AbiAndPrefAlign,
    pub i32_align: AbiAndPrefAlign,
    pub i64_align: AbiAndPrefAlign,
    pub i128_align: AbiAndPrefAlign,
    pub f16_align: AbiAndPrefAlign,
    pub f32_align: AbiAndPrefAlign,
    pub f64_align: AbiAndPrefAlign,
    pub f128_align: AbiAndPrefAlign,
    pub pointer_size: Size,
    pub pointer_align: AbiAndPrefAlign,
    pub aggregate_align: AbiAndPrefAlign,
    pub vector_align: Vec<(Size, AbiAndPrefAlign)>,
    pub instruction_address_space: AddressSpace,
    pub c_enum_min_size: Integer,

}
Expand description

Parsed Data layout for a target, which contains everything needed to compute layouts.

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§endian: Endian§i1_align: AbiAndPrefAlign§i8_align: AbiAndPrefAlign§i16_align: AbiAndPrefAlign§i32_align: AbiAndPrefAlign§i64_align: AbiAndPrefAlign§i128_align: AbiAndPrefAlign§f16_align: AbiAndPrefAlign§f32_align: AbiAndPrefAlign§f64_align: AbiAndPrefAlign§f128_align: AbiAndPrefAlign§pointer_size: Size§pointer_align: AbiAndPrefAlign§aggregate_align: AbiAndPrefAlign§vector_align: Vec<(Size, AbiAndPrefAlign)>

Alignments for vector types.

§instruction_address_space: AddressSpace§c_enum_min_size: Integer

Minimum size of #[repr(C)] enums (default c_int::BITS, usually 32) Note: This isn’t in LLVM’s data layout string, it is short_enum so the only valid spec for LLVM is c_int::BITS or 8

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impl TargetDataLayout

pub fn parse_from_llvm_datalayout_string<'a>( input: &'a str, ) -> Result<TargetDataLayout, TargetDataLayoutErrors<'a>>

Parse data layout from an llvm data layout string

This function doesn’t fill c_enum_min_size and it will always be I32 since it can not be determined from llvm string.

pub fn obj_size_bound(&self) -> u64

Returns exclusive upper bound on object size in bytes.

The theoretical maximum object size is defined as the maximum positive isize value. This ensures that the offset semantics remain well-defined by allowing it to correctly index every address within an object along with one byte past the end, along with allowing isize to store the difference between any two pointers into an object.

LLVM uses a 64-bit integer to represent object size in bits, but we care only for bytes, so we adopt such a more-constrained size bound due to its technical limitations.

pub fn ptr_sized_integer(&self) -> Integer

pub fn vector_align(&self, vec_size: Size) -> AbiAndPrefAlign

Trait Implementations§

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impl Debug for TargetDataLayout

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl Default for TargetDataLayout

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fn default() -> TargetDataLayout

Creates an instance of TargetDataLayout.

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impl HasDataLayout for &TargetDataLayout

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fn data_layout(&self) -> &TargetDataLayout

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impl HasDataLayout for TargetDataLayout

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fn data_layout(&self) -> &TargetDataLayout

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impl PartialEq for TargetDataLayout

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fn eq(&self, other: &TargetDataLayout) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Eq for TargetDataLayout

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impl StructuralPartialEq for TargetDataLayout

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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Immutably borrows from an owned value. Read more
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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
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Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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Dereferences the given pointer. Read more
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Drops the object pointed to by the given pointer. Read more
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Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 64 bytes