Struct rustc_codegen_llvm::abi::FnAbi

pub struct FnAbi<'a, Ty> {
    pub args: Box<[ArgAbi<'a, Ty>], Global>,
    pub ret: ArgAbi<'a, Ty>,
    pub c_variadic: bool,
    pub fixed_count: u32,
    pub conv: Conv,
    pub can_unwind: bool,
}

Metadata describing how the arguments to a native function should be passed in order to respect the native ABI.

I will do my best to describe this structure, but these comments are reverse-engineered and may be inaccurate. -NDM

Fields

args: Box<[ArgAbi<'a, Ty>], Global>

The LLVM types of each argument.

ret: ArgAbi<'a, Ty>

LLVM return type.

c_variadic: bool

fixed_count: u32

The count of non-variadic arguments.

Should only be different from args.len() when c_variadic is true. This can be used to know whether an argument is variadic or not.

conv: Conv

can_unwind: bool

Trait Implementations

impl<'ll, 'tcx> FnAbiLlvmExt<'ll, 'tcx> for FnAbi<'tcx, Ty<'tcx>>

fn llvm_type(&self, cx: &CodegenCx<'ll, 'tcx>) -> &'ll Type

fn ptr_to_llvm_type(&self, cx: &CodegenCx<'ll, 'tcx>) -> &'ll Type

fn llvm_cconv(&self) -> CallConv

fn apply_attrs_llfn(&self, cx: &CodegenCx<'ll, 'tcx>, llfn: &'ll Value)

fn apply_attrs_callsite( &self, bx: &mut Builder<'_, 'll, 'tcx>, callsite: &'ll Value )

Layout

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.