Struct rustc_codegen_llvm::common::Funclet

pub(crate) struct Funclet<'ll> {
    cleanuppad: &'ll Value,
    operand: OperandBundleDef<'ll>,
}

A structure representing an active landing pad for the duration of a basic block.

Each Block may contain an instance of this, indicating whether the block is part of a landing pad or not. This is used to make decision about whether to emit invoke instructions (e.g., in a landing pad we don’t continue to use invoke) and also about various function call metadata.

For GNU exceptions (landingpad + resume instructions) this structure is just a bunch of None instances (not too interesting), but for MSVC exceptions (cleanuppad + cleanupret instructions) this contains data. When inside of a landing pad, each function call in LLVM IR needs to be annotated with which landing pad it’s a part of. This is accomplished via the OperandBundleDef value created for MSVC landing pads.

Fields

cleanuppad: &'ll Value

operand: OperandBundleDef<'ll>

Implementations

impl<'ll> Funclet<'ll>

pub(crate) fn new(cleanuppad: &'ll Value) -> Self

pub(crate) fn cleanuppad(&self) -> &'ll Value

pub(crate) fn bundle(&self) -> &OperandBundleDef<'ll>

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: 16 bytes