diff --git a/src/chalk/codegen.cr b/src/chalk/codegen.cr
index a9b6669..0a54bc8 100644
--- a/src/chalk/codegen.cr
+++ b/src/chalk/codegen.cr
@@ -5,7 +5,7 @@ module Chalk
   class CodeGenerator
     include Emitter
     RETURN_REG = 14
-    STACK_REG = 13
+    STACK_REG  = 13
 
     def initialize(table, @function : TreeFunction)
       @registers = 0
diff --git a/src/chalk/compiler.cr b/src/chalk/compiler.cr
index 55e377c..605f3ae 100644
--- a/src/chalk/compiler.cr
+++ b/src/chalk/compiler.cr
@@ -26,8 +26,8 @@ module Chalk
         @logger.debug("Beginning constant folding")
         folder = ConstantFolder.new
         trees.map! do |tree|
-            @logger.debug("Constant folding #{tree.name}")
-            tree.apply(folder).as(TreeFunction)
+          @logger.debug("Constant folding #{tree.name}")
+          tree.apply(folder).as(TreeFunction)
         end
         @logger.debug("Done constant folding")
         return trees
@@ -47,9 +47,9 @@ module Chalk
     end
 
     private def create_code(tree : TreeFunction, table)
-        generator = CodeGenerator.new table, tree
-        @logger.debug("Generating code for #{tree.name}")
-        return generator.generate!
+      generator = CodeGenerator.new table, tree
+      @logger.debug("Generating code for #{tree.name}")
+      return generator.generate!
     end
 
     private def create_code(trees : Array(TreeFunction), table)
@@ -82,32 +82,32 @@ module Chalk
       context = InstructionContext.new table, instructions.size
       binary = instructions.map_with_index { |it, i| it.to_bin(context, i).to_u16 }
       binary.each do |inst|
-          first = (inst >> 8).to_u8
-          dest.write_byte(first)
-          second = (inst & 0xff).to_u8
-          dest.write_byte(second)
+        first = (inst >> 8).to_u8
+        dest.write_byte(first)
+        second = (inst & 0xff).to_u8
+        dest.write_byte(second)
       end
     end
 
     private def collect_calls(table)
-        open = Set(String).new
-        done = Set(String).new
+      open = Set(String).new
+      done = Set(String).new
 
-        open << "main"
-        while !open.empty?
-            first = open.first
-            open.delete first
-            done << first
+      open << "main"
+      while !open.empty?
+        first = open.first
+        open.delete first
+        done << first
 
-            entry = table[first]?
-            raise "Unknown function" unless entry && entry.is_a?(FunctionEntry)
-            next unless entry.function.is_a?(TreeFunction)
+        entry = table[first]?
+        raise "Unknown function" unless entry && entry.is_a?(FunctionEntry)
+        next unless entry.function.is_a?(TreeFunction)
 
-            visitor = CallVisitor.new
-            entry.function.accept(visitor)
-            open.concat(visitor.calls - done)
-        end
-        return done
+        visitor = CallVisitor.new
+        entry.function.accept(visitor)
+        open.concat(visitor.calls - done)
+      end
+      return done
     end
 
     private def run_binary
diff --git a/src/chalk/emitter.cr b/src/chalk/emitter.cr
index d48dda4..e2f4c7d 100644
--- a/src/chalk/emitter.cr
+++ b/src/chalk/emitter.cr
@@ -1,75 +1,75 @@
 module Chalk
-    module Emitter
-        private def load(into, value)
-            inst = LoadInstruction.new into, value.to_i32
-            @instructions << inst
-            return inst
-        end
-
-        private def loadr(into, from)
-            inst = LoadRegInstruction.new into, from
-            @instructions << inst
-            return inst
-        end
-
-        private def op(op, into, from)
-            inst = OpInstruction.new op, into, from
-            @instructions << inst
-            return inst
-        end
-
-        private def opr(op, into, from)
-            inst = OpRegInstruction.new op, into, from
-            @instructions << inst
-            return inst
-        end
-
-        private def sne(l, r)
-            inst = SkipNeInstruction.new l, r
-            @instructions << inst
-            return inst
-        end
-
-        private def jr(o)
-            inst = JumpRelativeInstruction.new o
-            @instructions << inst
-            return inst
-        end
-
-        private def store(up_to)
-            inst = StoreInstruction.new up_to
-            @instructions << inst
-            return inst
-        end
-
-        private def restore(up_to)
-            inst = RestoreInstruction.new up_to
-            @instructions << inst
-            return inst
-        end
-
-        private def ret
-            inst = ReturnInstruction.new
-            @instructions << inst
-            return inst
-        end
-
-        private def call(func)
-            inst = CallInstruction.new func
-            @instructions << inst
-            return inst
-        end
-
-        private def setis
-            inst = SetIStackInstruction.new 
-            @instructions << inst
-            return inst
-        end
-
-        private def addi(reg)
-            inst = AddIRegInstruction.new reg
-            @instructions << inst
-            return inst
-        end
+  module Emitter
+    private def load(into, value)
+      inst = LoadInstruction.new into, value.to_i32
+      @instructions << inst
+      return inst
     end
+
+    private def loadr(into, from)
+      inst = LoadRegInstruction.new into, from
+      @instructions << inst
+      return inst
+    end
+
+    private def op(op, into, from)
+      inst = OpInstruction.new op, into, from
+      @instructions << inst
+      return inst
+    end
+
+    private def opr(op, into, from)
+      inst = OpRegInstruction.new op, into, from
+      @instructions << inst
+      return inst
+    end
+
+    private def sne(l, r)
+      inst = SkipNeInstruction.new l, r
+      @instructions << inst
+      return inst
+    end
+
+    private def jr(o)
+      inst = JumpRelativeInstruction.new o
+      @instructions << inst
+      return inst
+    end
+
+    private def store(up_to)
+      inst = StoreInstruction.new up_to
+      @instructions << inst
+      return inst
+    end
+
+    private def restore(up_to)
+      inst = RestoreInstruction.new up_to
+      @instructions << inst
+      return inst
+    end
+
+    private def ret
+      inst = ReturnInstruction.new
+      @instructions << inst
+      return inst
+    end
+
+    private def call(func)
+      inst = CallInstruction.new func
+      @instructions << inst
+      return inst
+    end
+
+    private def setis
+      inst = SetIStackInstruction.new
+      @instructions << inst
+      return inst
+    end
+
+    private def addi(reg)
+      inst = AddIRegInstruction.new reg
+      @instructions << inst
+      return inst
+    end
+  end
 end
diff --git a/src/chalk/function_finder.cr b/src/chalk/function_finder.cr
index 59c8b27..7683396 100644
--- a/src/chalk/function_finder.cr
+++ b/src/chalk/function_finder.cr
@@ -1,13 +1,13 @@
 module Chalk
-    class CallVisitor < Visitor
-        property calls : Set(String)
+  class CallVisitor < Visitor
+    property calls : Set(String)
 
-        def initialize
-            @calls = Set(String).new
-        end
-
-        def visit(t : TreeCall)
-            @calls << t.name
-        end
+    def initialize
+      @calls = Set(String).new
     end
+
+    def visit(t : TreeCall)
+      @calls << t.name
+    end
+  end
 end
diff --git a/src/chalk/ir.cr b/src/chalk/ir.cr
index a10dfbb..73b9ecf 100644
--- a/src/chalk/ir.cr
+++ b/src/chalk/ir.cr
@@ -8,11 +8,11 @@ module Chalk
   end
 
   class InstructionContext
-      property table : Table
-      property stack : Int32
+    property table : Table
+    property stack : Int32
 
-      def initialize(@table, @stack)
-      end
+    def initialize(@table, @stack)
+    end
   end
 
   class LoadInstruction < Instruction
@@ -29,7 +29,7 @@ module Chalk
     end
 
     def to_bin(i, index)
-        0x6000 | (register << 8) | value
+      0x6000 | (register << 8) | value
     end
   end
 
@@ -48,7 +48,7 @@ module Chalk
     end
 
     def to_bin(i, index)
-        0x8000 | (into << 8) | (from << 4)
+      0x8000 | (into << 8) | (from << 4)
     end
   end
 
@@ -67,12 +67,12 @@ module Chalk
     end
 
     def to_bin(i, index)
-        case op
-        when TokenType::OpAdd
-            return 0x7000 | (into << 8) | value
-        else
-            raise "Invalid instruction"
-        end
+      case op
+      when TokenType::OpAdd
+        return 0x7000 | (into << 8) | value
+      else
+        raise "Invalid instruction"
+      end
     end
   end
 
@@ -92,22 +92,22 @@ module Chalk
     end
 
     def to_bin(i, index)
-        code = 0
-        case op
-        when TokenType::OpAdd
-            code = 4
-        when TokenType::OpSub
-            code = 5
-        when TokenType::OpOr
-            code = 1
-        when TokenType::OpAnd
-            code = 2
-        when TokenType::OpXor
-            code = 3
-        else
-            raise "Invalid instruction"
-        end
-        return 0x8000 | (into << 8) | (from << 4) | code
+      code = 0
+      case op
+      when TokenType::OpAdd
+        code = 4
+      when TokenType::OpSub
+        code = 5
+      when TokenType::OpOr
+        code = 1
+      when TokenType::OpAnd
+        code = 2
+      when TokenType::OpXor
+        code = 3
+      else
+        raise "Invalid instruction"
+      end
+      return 0x8000 | (into << 8) | (from << 4) | code
     end
   end
 
@@ -123,7 +123,7 @@ module Chalk
     end
 
     def to_bin(i, index)
-        return 0xf055 | (up_to << 8)
+      return 0xf055 | (up_to << 8)
     end
   end
 
@@ -139,12 +139,12 @@ module Chalk
     end
 
     def to_bin(i, index)
-        return 0xf065 | (up_to << 8)
+      return 0xf065 | (up_to << 8)
     end
   end
 
   class ReturnInstruction < Instruction
-    def initialize()
+    def initialize
     end
 
     def to_s(io)
@@ -152,7 +152,7 @@ module Chalk
     end
 
     def to_bin(i, index)
-        return 0x00ee
+      return 0x00ee
     end
   end
 
@@ -167,7 +167,7 @@ module Chalk
     end
 
     def to_bin(i, index)
-        return 0x1000 | ((offset + index) * 2 + 0x200)
+      return 0x1000 | ((offset + index) * 2 + 0x200)
     end
   end
 
@@ -185,7 +185,7 @@ module Chalk
     end
 
     def to_bin(i, index)
-        return 0x3000 | (left << 8) | right
+      return 0x3000 | (left << 8) | right
     end
   end
 
@@ -203,7 +203,7 @@ module Chalk
     end
 
     def to_bin(i, index)
-        return 0x4000 | (left << 8) | right
+      return 0x4000 | (left << 8) | right
     end
   end
 
@@ -222,7 +222,7 @@ module Chalk
     end
 
     def to_bin(i, index)
-        return 0x5000 | (left << 8) | (right << 4)
+      return 0x5000 | (left << 8) | (right << 4)
     end
   end
 
@@ -241,7 +241,7 @@ module Chalk
     end
 
     def to_bin(i, index)
-        return 0x9000 | (left << 8) | (right << 4)
+      return 0x9000 | (left << 8) | (right << 4)
     end
   end
 
@@ -256,17 +256,17 @@ module Chalk
     end
 
     def to_bin(i, index)
-        return 0x2000 | (i.table[name]?.as(FunctionEntry).addr * 2 + 0x200)
+      return 0x2000 | (i.table[name]?.as(FunctionEntry).addr * 2 + 0x200)
     end
   end
-  
+
   class SetIStackInstruction < Instruction
     def to_s(io)
       io << "setis"
     end
 
     def to_bin(i, index)
-        return 0xa000 | (i.stack * 2 + 0x200)
+      return 0xa000 | (i.stack * 2 + 0x200)
     end
   end
 
@@ -282,7 +282,7 @@ module Chalk
     end
 
     def to_bin(i, index)
-        return 0xf000 | (reg << 8) | 0x1e
+      return 0xf000 | (reg << 8) | 0x1e
     end
   end
 end
diff --git a/src/chalk/optimizer.cr b/src/chalk/optimizer.cr
index 6bb71ba..6eaafa6 100644
--- a/src/chalk/optimizer.cr
+++ b/src/chalk/optimizer.cr
@@ -1,36 +1,36 @@
 module Chalk
-    class Optimizer
-        def initialize(instructions : Array(Instruction))
-            @instructions = instructions.dup
-        end
-
-        private def optimize!(range)
-            offset = 0
-            range.each do |index|
-                if check_dead(@instructions[index + offset])
-                    @instructions.delete_at(index + offset)
-                    offset -= 1
-                end
-            end
-            return offset
-        end
-
-        private def optimize!
-            block_boundaries = [ @instructions.size ]
-            @instructions.each_with_index do |inst, i|
-                if inst.is_a?(JumpRelativeInstruction)
-                    block_boundaries << (inst.offset + i)
-                end
-            end
-            block_boundaries.sort!
-
-            previous = 0
-            offset = 0
-            block_boundaries.each do |boundary|
-                range = (previous + offset)...(boundary + offset)
-                offset += optimize!(range)
-                previous = boundary
-            end
-        end
+  class Optimizer
+    def initialize(instructions : Array(Instruction))
+      @instructions = instructions.dup
     end
+
+    private def optimize!(range)
+      offset = 0
+      range.each do |index|
+        if check_dead(@instructions[index + offset])
+          @instructions.delete_at(index + offset)
+          offset -= 1
+        end
+      end
+      return offset
+    end
+
+    private def optimize!
+      block_boundaries = [@instructions.size]
+      @instructions.each_with_index do |inst, i|
+        if inst.is_a?(JumpRelativeInstruction)
+          block_boundaries << (inst.offset + i)
+        end
+      end
+      block_boundaries.sort!
+
+      previous = 0
+      offset = 0
+      block_boundaries.each do |boundary|
+        range = (previous + offset)...(boundary + offset)
+        offset += optimize!(range)
+        previous = boundary
+      end
+    end
+  end
 end