+ bool unused = true;
+ for(const Block *b=█ (unused && b); b=b->parent)
+ unused = !b->variables.count(name);
+ if(unused)
+ return name;
+
+ name.erase(base_size);
+ name += format("_%d", number);
+ ++number;
+ }
+}
+
+int get_layout_value(const Layout &layout, const string &name, int def_value)
+{
+ auto i = find_member(layout.qualifiers, name, &Layout::Qualifier::name);
+ return (i!=layout.qualifiers.end() ? i->value : def_value);
+}
+
+void add_to_chain(Assignment::Target &target, Assignment::Target::ChainType type, unsigned index)
+{
+ if(target.chain_len<7)
+ target.chain[target.chain_len] = type | min<unsigned>(index, 0x3F);
+ ++target.chain_len;
+}
+
+bool targets_overlap(const Assignment::Target &target1, const Assignment::Target &target2)
+{
+ bool overlap = (target1.declaration==target2.declaration);
+ for(unsigned i=0; (overlap && i<target1.chain_len && i<target2.chain_len); ++i)
+ {
+ Assignment::Target::ChainType type1 = static_cast<Assignment::Target::ChainType>(target1.chain[i]&0xC0);
+ Assignment::Target::ChainType type2 = static_cast<Assignment::Target::ChainType>(target2.chain[i]&0xC0);
+ unsigned index1 = target1.chain[i]&0x3F;
+ unsigned index2 = target2.chain[i]&0x3F;
+ if(type1==Assignment::Target::SWIZZLE || type2==Assignment::Target::SWIZZLE)