storeAtomic

    pub fn storeAtomic(
        self: *WipFunction,
        access_kind: MemoryAccessKind,
        val: Value,
        ptr: Value,
        sync_scope: SyncScope,
        ordering: AtomicOrdering,
        alignment: Alignment,
    ) Allocator.Error!Instruction.Index {
        assert(ptr.typeOfWip(self).isPointer(self.builder));
        try self.ensureUnusedExtraCapacity(1, Instruction.Store, 0);
        const instruction = try self.addInst(null, .{
            .tag = switch (ordering) {
                .none => .store,
                else => .@"store atomic",
            },
            .data = self.addExtraAssumeCapacity(Instruction.Store{
                .info = .{
                    .access_kind = access_kind,
                    .sync_scope = switch (ordering) {
                        .none => .system,
                        else => sync_scope,
                    },
                    .success_ordering = ordering,
                    .alignment = alignment,
                },
                .val = val,
                .ptr = ptr,
            }),
        });
        return instruction;
    }