Method mark_var_needs_stack_map

cranelift/frontend/src/ssa.rs:223–231

Mark `var` as needing its bindings tracked for stack maps.

(&mut self, var: Variable)

    /// Mark `var` as needing its bindings tracked for stack maps.
    pub fn mark_var_needs_stack_map(&mut self, var: Variable) {
        debug_assert!(
            self.variables[var].values().all(|v| v.is_none()),
            "declare_var_needs_stack_map({var:?}) must be called before any \
             definition of the variable; otherwise earlier definitions are \
             silently omitted from stack maps"
        );
        self.stack_map_vars.insert(var);
    }

    /// SSA values that must be included in stack maps.
    pub fn stack_map_values(&self) -> &EntitySet<Value> {