Function append_stack_map_entries

cranelift/codegen/src/inline.rs:584–618

Append stack map entries from the caller and callee to the given inlined instruction.

(
    func: &mut ir::Function,
    callee: &ir::Function,
    entity_map: &EntityMap,
    call_stack_map: Option<&[ir::UserStackMapEntry]>,
    inlined_inst: ir::Inst,
    callee_inst: ir::Inst,
)

/// Append stack map entries from the caller and callee to the given inlined
/// instruction.
fn append_stack_map_entries(
    func: &mut ir::Function,
    callee: &ir::Function,
    entity_map: &EntityMap,
    call_stack_map: Option<&[ir::UserStackMapEntry]>,
    inlined_inst: ir::Inst,
    callee_inst: ir::Inst,
) {
    // Add the caller's stack map to this call. These entries
    // already refer to caller entities and do not need further
    // translation.
    func.dfg.append_user_stack_map_entries(
        inlined_inst,
        call_stack_map
            .iter()
            .flat_map(|entries| entries.iter().cloned()),
    );

    // Append the callee's stack map to this call. These entries
    // refer to callee entities and therefore do require
    // translation into the caller's index space.
    func.dfg.append_user_stack_map_entries(
        inlined_inst,
        callee
            .dfg
            .user_stack_map_entries(callee_inst)
            .iter()
            .flat_map(|entries| entries.iter())
            .map(|entry| ir::UserStackMapEntry {
                ty: entry.ty,
                slot: entity_map.inlined_stack_slot(entry.slot),
                offset: entry.offset,
            }),
    );
}

/// Create or update the exception tables for any inlined call instructions:
/// when inlining at a `try_call` site, we must forward our exceptional edges