atomicrmw

    pub fn atomicrmw(
        self: *WipFunction,
        access_kind: MemoryAccessKind,
        operation: Instruction.AtomicRmw.Operation,
        ptr: Value,
        val: Value,
        sync_scope: SyncScope,
        ordering: AtomicOrdering,
        alignment: Alignment,
        name: []const u8,
    ) Allocator.Error!Value {
        assert(ptr.typeOfWip(self).isPointer(self.builder));
        assert(ordering != .none);

        try self.ensureUnusedExtraCapacity(1, Instruction.AtomicRmw, 0);
        const instruction = try self.addInst(name, .{
            .tag = .atomicrmw,
            .data = self.addExtraAssumeCapacity(Instruction.AtomicRmw{
                .info = .{
                    .access_kind = access_kind,
                    .atomic_rmw_operation = operation,
                    .sync_scope = sync_scope,
                    .success_ordering = ordering,
                    .alignment = alignment,
                },
                .ptr = ptr,
                .val = val,
            }),
        });
        return instruction.toValue();
    }