Oh my. Basic CFA/DFA, local variable support, misc fixes, etc.

src/alloy/hir/hir_builder.h

@@ -41,7 +41,12 @@ public:
   uint32_t attributes() const { return attributes_; }
   void set_attributes(uint32_t value) { attributes_ = value; }
 
+  std::vector<Value*>& locals() { return locals_; }
+
+  uint32_t max_value_ordinal() const { return next_value_ordinal_; }
+
   Block* first_block() const { return block_head_; }
+  Block* last_block() const { return block_tail_; }
   Block* current_block() const;
   Instr* last_instr() const;
 
@@ -50,12 +55,11 @@ public:
   void InsertLabel(Label* label, Instr* prev_instr);
   void ResetLabelTags();
 
+  void AddEdge(Block* src, Block* dest, uint32_t flags);
+
   // static allocations:
   // Value* AllocStatic(size_t length);
 
-  // stack allocations:
-  // Value* AllocLocal(TypeName type);
-
   void Comment(const char* format, ...);
 
   void Nop();
@@ -116,6 +120,10 @@ public:
 
   Value* LoadClock();
 
+  Value* AllocLocal(TypeName type);
+  Value* LoadLocal(Value* slot);
+  void StoreLocal(Value* slot, Value* value);
+
   Value* LoadContext(size_t offset, TypeName type);
   void StoreContext(size_t offset, Value* value);
 
@@ -230,6 +238,8 @@ protected:
   uint32_t  next_label_id_;
   uint32_t  next_value_ordinal_;
 
+  std::vector<Value*> locals_;
+
   Block*    block_head_;
   Block*    block_tail_;
   Block*    current_block_;