Struct rustc_abi::TargetDataLayout
source · pub struct TargetDataLayout {Show 15 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 f32_align: AbiAndPrefAlign,
pub f64_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.
Fields§
§endian: Endian
§i1_align: AbiAndPrefAlign
§i8_align: AbiAndPrefAlign
§i16_align: AbiAndPrefAlign
§i32_align: AbiAndPrefAlign
§i64_align: AbiAndPrefAlign
§i128_align: AbiAndPrefAlign
§f32_align: AbiAndPrefAlign
§f64_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
Implementations§
source§impl TargetDataLayout
impl TargetDataLayout
sourcepub fn parse_from_llvm_datalayout_string<'a>(
input: &'a str
) -> Result<TargetDataLayout, TargetDataLayoutErrors<'a>>
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.
sourcepub fn obj_size_bound(&self) -> u64
pub fn obj_size_bound(&self) -> u64
Returns exclusive upper bound on object size.
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.
The upper bound on 64-bit currently needs to be lower because LLVM uses a 64-bit integer to represent object size in bits. It would need to be 1 << 61 to account for this, but is currently conservatively bounded to 1 << 47 as that is enough to cover the current usable address space on 64-bit ARMv8 and x86_64.
pub fn ptr_sized_integer(&self) -> Integer
pub fn vector_align(&self, vec_size: Size) -> AbiAndPrefAlign
Trait Implementations§
source§impl Debug for TargetDataLayout
impl Debug for TargetDataLayout
source§impl Default for TargetDataLayout
impl Default for TargetDataLayout
source§fn default() -> TargetDataLayout
fn default() -> TargetDataLayout
Creates an instance of TargetDataLayout
.
source§impl HasDataLayout for TargetDataLayout
impl HasDataLayout for TargetDataLayout
fn data_layout(&self) -> &TargetDataLayout
source§impl PartialEq<TargetDataLayout> for TargetDataLayout
impl PartialEq<TargetDataLayout> for TargetDataLayout
source§fn eq(&self, other: &TargetDataLayout) -> bool
fn eq(&self, other: &TargetDataLayout) -> bool
self
and other
values to be equal, and is used
by ==
.impl Eq for TargetDataLayout
impl StructuralEq for TargetDataLayout
impl StructuralPartialEq for TargetDataLayout
Auto Trait Implementations§
impl RefUnwindSafe for TargetDataLayout
impl Send for TargetDataLayout
impl Sync for TargetDataLayout
impl Unpin for TargetDataLayout
impl UnwindSafe for TargetDataLayout
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
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