Enum rustc_codegen_llvm::abi::PassMode[][src]

pub enum PassMode {
    Ignore,
    Direct(ArgAttributes),
    Pair(ArgAttributesArgAttributes),
    Cast(CastTarget),
    Indirect {
        attrs: ArgAttributes,
        extra_attrs: Option<ArgAttributes>,
        on_stack: bool,
    },
}

Variants

Ignore

Ignore the argument.

The argument is either uninhabited or a ZST.

Direct(ArgAttributes)

Tuple Fields

Pass the argument directly.

The argument has a layout abi of Scalar, Vector or in rare cases Aggregate.

Pair(ArgAttributesArgAttributes)

Tuple Fields

Pass a pair’s elements directly in two arguments.

The argument has a layout abi of ScalarPair.

Cast(CastTarget)

Tuple Fields

Pass the argument after casting it, to either a single uniform or a pair of registers.

Indirect

Fields

extra_attrs: Option<ArgAttributes>
on_stack: bool

Pass the argument indirectly via a hidden pointer. The extra_attrs value, if any, is for the extra data (vtable or length) which indicates that it refers to an unsized rvalue. on_stack defines that the the value should be passed at a fixed stack offset in accordance to the ABI rather than passed using a pointer. This corresponds to the byval LLVM argument attribute.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Performs the conversion.

Performs the conversion.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.

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: 48 bytes

Size for each variant: