Trait LayoutTypeCodegenMethods 

pub trait LayoutTypeCodegenMethods<'tcx>: BackendTypes {
    // Required methods
    fn backend_type(&self, layout: TyAndLayout<'tcx>) -> Self::Type;
    fn cast_backend_type(&self, ty: &CastTarget) -> Self::Type;
    fn fn_decl_backend_type(
        &self,
        fn_abi: &FnAbi<'tcx, Ty<'tcx>>,
    ) -> Self::FunctionSignature;
    fn fn_ptr_backend_type(&self, fn_abi: &FnAbi<'tcx, Ty<'tcx>>) -> Self::Type;
    fn reg_backend_type(&self, ty: &Reg) -> Self::Type;
    fn immediate_backend_type(&self, layout: TyAndLayout<'tcx>) -> Self::Type;
    fn scalar_pair_element_backend_type(
        &self,
        layout: TyAndLayout<'tcx>,
        index: usize,
        immediate: bool,
    ) -> Self::Type;
}

Required Methods

fn backend_type(&self, layout: TyAndLayout<'tcx>) -> Self::Type

The backend type used for a rust type when it’s in memory, such as when it’s stack-allocated or when it’s being loaded or stored.

fn cast_backend_type(&self, ty: &CastTarget) -> Self::Type

fn fn_decl_backend_type( &self, fn_abi: &FnAbi<'tcx, Ty<'tcx>>, ) -> Self::FunctionSignature

fn fn_ptr_backend_type(&self, fn_abi: &FnAbi<'tcx, Ty<'tcx>>) -> Self::Type

fn reg_backend_type(&self, ty: &Reg) -> Self::Type

fn immediate_backend_type(&self, layout: TyAndLayout<'tcx>) -> Self::Type

The backend type used for a rust type when it’s in an SSA register.

For nearly all types this is the same as the Self::backend_type, however bool (and other 0-or-1 values) are kept as i1 in registers but as BaseTypeCodegenMethods::type_i8 in memory.

Converting values between the two different backend types is done using from_immediate and to_immediate_scalar.

fn scalar_pair_element_backend_type( &self, layout: TyAndLayout<'tcx>, index: usize, immediate: bool, ) -> Self::Type

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors