Trait rustc_codegen_llvm::type_of::LayoutLlvmExt
source · pub(crate) trait LayoutLlvmExt<'tcx> {
// Required methods
fn is_llvm_immediate(&self) -> bool;
fn is_llvm_scalar_pair(&self) -> bool;
fn llvm_type<'a>(&self, cx: &CodegenCx<'a, 'tcx>) -> &'a Type;
fn immediate_llvm_type<'a>(&self, cx: &CodegenCx<'a, 'tcx>) -> &'a Type;
fn scalar_llvm_type_at<'a>(
&self,
cx: &CodegenCx<'a, 'tcx>,
scalar: Scalar,
) -> &'a Type;
fn scalar_pair_element_llvm_type<'a>(
&self,
cx: &CodegenCx<'a, 'tcx>,
index: usize,
immediate: bool,
) -> &'a Type;
}Required Methods§
fn is_llvm_immediate(&self) -> bool
fn is_llvm_scalar_pair(&self) -> bool
fn llvm_type<'a>(&self, cx: &CodegenCx<'a, 'tcx>) -> &'a Type
fn immediate_llvm_type<'a>(&self, cx: &CodegenCx<'a, 'tcx>) -> &'a Type
fn scalar_llvm_type_at<'a>( &self, cx: &CodegenCx<'a, 'tcx>, scalar: Scalar, ) -> &'a Type
fn scalar_pair_element_llvm_type<'a>( &self, cx: &CodegenCx<'a, 'tcx>, index: usize, immediate: bool, ) -> &'a Type
Implementations on Foreign Types§
source§impl<'tcx> LayoutLlvmExt<'tcx> for TyAndLayout<'tcx>
impl<'tcx> LayoutLlvmExt<'tcx> for TyAndLayout<'tcx>
source§fn llvm_type<'a>(&self, cx: &CodegenCx<'a, 'tcx>) -> &'a Type
fn llvm_type<'a>(&self, cx: &CodegenCx<'a, 'tcx>) -> &'a Type
Gets the LLVM type corresponding to a Rust type, i.e., rustc_middle::ty::Ty.
The pointee type of the pointer in PlaceRef is always this type.
For sized types, it is also the right LLVM type for an alloca
containing a value of that type, and most immediates (except bool).
Unsized types, however, are represented by a “minimal unit”, e.g.
[T] becomes T, while str and Trait turn into i8 - this
is useful for indexing slices, as &[T]’s data pointer is T*.
If the type is an unsized struct, the regular layout is generated,
with the inner-most trailing unsized field using the “minimal unit”
of that field’s type - this is useful for taking the address of
that field and ensuring the struct has the right alignment.