diff --git a/src/main/java/dk/camelot64/kickc/Compiler.java b/src/main/java/dk/camelot64/kickc/Compiler.java
index 6e0c82f0b..0929ad956 100644
--- a/src/main/java/dk/camelot64/kickc/Compiler.java
+++ b/src/main/java/dk/camelot64/kickc/Compiler.java
@@ -140,6 +140,8 @@ public class Compiler {
       new Pass1ModifiedVarsAnalysis(program).execute();
       getLog().append(program.getProcedureModifiedVars().toString(program));
 
+      new Pass1ProcedureInline(program).execute();
+
       new Pass1ProcedureCallParameters(program).generate();
       //getLog().append("CONTROL FLOW GRAPH WITH ASSIGNMENT CALL");
       //getLog().append(program.getGraph().toString(program));
diff --git a/src/main/java/dk/camelot64/kickc/model/ControlFlowGraph.java b/src/main/java/dk/camelot64/kickc/model/ControlFlowGraph.java
index b46279ca5..ecf703069 100644
--- a/src/main/java/dk/camelot64/kickc/model/ControlFlowGraph.java
+++ b/src/main/java/dk/camelot64/kickc/model/ControlFlowGraph.java
@@ -15,7 +15,7 @@ import java.util.*;
  */
 public class ControlFlowGraph {
 
-   private Map<LabelRef, ControlFlowBlock> blocks;
+   private List<ControlFlowBlock> blocks;
    private LabelRef firstBlockRef;
 
    /**
@@ -23,37 +23,41 @@ public class ControlFlowGraph {
     */
    private List<LabelRef> sequence;
 
-   public ControlFlowGraph(Map<LabelRef, ControlFlowBlock> blocks, LabelRef firstBlockRef) {
+   public ControlFlowGraph(List<ControlFlowBlock> blocks, LabelRef firstBlockRef) {
       this.blocks = blocks;
       this.firstBlockRef = firstBlockRef;
    }
 
    public ControlFlowBlock getBlock(LabelRef symbol) {
-      return blocks.get(symbol);
+      for(ControlFlowBlock block : blocks) {
+         if(block.getLabel().equals(symbol)) {
+            return block;
+         }
+      }
+      return null;
    }
 
    public void addBlock(ControlFlowBlock block) {
-      blocks.put(block.getLabel(), block);
+      blocks.add(block);
    }
 
    public ControlFlowBlock getFirstBlock() {
       return getBlock(firstBlockRef);
    }
 
-   public Collection<ControlFlowBlock> getAllBlocks() {
-      if(sequence != null) {
-         ArrayList<ControlFlowBlock> blocks = new ArrayList<>();
-         for(LabelRef labelRef : sequence) {
-            blocks.add(getBlock(labelRef));
-         }
+   public List<ControlFlowBlock> getAllBlocks() {
          return blocks;
-      } else {
-         return blocks.values();
-      }
    }
 
    public void remove(LabelRef label) {
-      blocks.remove(label);
+      ListIterator<ControlFlowBlock> blocksIt = blocks.listIterator();
+      while(blocksIt.hasNext()) {
+         ControlFlowBlock block = blocksIt.next();
+         if(block.getLabel().equals(label)) {
+            blocksIt.remove();
+            return;
+         }
+      }
    }
 
    /**
@@ -105,7 +109,7 @@ public class ControlFlowGraph {
 
    public ControlFlowBlock getDefaultSuccessor(ControlFlowBlock block) {
       if(block.getDefaultSuccessor() != null) {
-         return blocks.get(block.getDefaultSuccessor());
+         return getBlock(block.getDefaultSuccessor());
       } else {
          return null;
       }
@@ -113,7 +117,7 @@ public class ControlFlowGraph {
 
    public ControlFlowBlock getCallSuccessor(ControlFlowBlock block) {
       if(block.getCallSuccessor() != null) {
-         return blocks.get(block.getCallSuccessor());
+         return getBlock(block.getCallSuccessor());
       } else {
          return null;
       }
@@ -121,7 +125,7 @@ public class ControlFlowGraph {
 
    public ControlFlowBlock getConditionalSuccessor(ControlFlowBlock block) {
       if(block.getConditionalSuccessor() != null) {
-         return blocks.get(block.getConditionalSuccessor());
+         return getBlock(block.getConditionalSuccessor());
       } else {
          return null;
       }
@@ -150,7 +154,15 @@ public class ControlFlowGraph {
    }
 
    public void setSequence(List<LabelRef> sequence) {
+      if(sequence.size()!=blocks.size()) {
+         throw new CompileError("ERROR! Sequence does not contain all blocks from the program. Sequence: "+sequence.size()+" Blocks: "+blocks.size());
+      }
       this.sequence = sequence;
+      ArrayList<ControlFlowBlock> seqBlocks = new ArrayList<>();
+      for(LabelRef labelRef : sequence) {
+         seqBlocks.add(getBlock(labelRef));
+      }
+      this.blocks = seqBlocks;
    }
 
    public ControlFlowBlock getMainBlock() {
diff --git a/src/main/java/dk/camelot64/kickc/model/ControlFlowGraphCopyVisitor.java b/src/main/java/dk/camelot64/kickc/model/ControlFlowGraphCopyVisitor.java
index 96adcee5b..a5a157de2 100644
--- a/src/main/java/dk/camelot64/kickc/model/ControlFlowGraphCopyVisitor.java
+++ b/src/main/java/dk/camelot64/kickc/model/ControlFlowGraphCopyVisitor.java
@@ -1,13 +1,13 @@
 package dk.camelot64.kickc.model;
 
 import dk.camelot64.kickc.model.operators.Operator;
+import dk.camelot64.kickc.model.statements.*;
 import dk.camelot64.kickc.model.values.LValue;
 import dk.camelot64.kickc.model.values.LabelRef;
 import dk.camelot64.kickc.model.values.RValue;
 import dk.camelot64.kickc.model.values.VariableRef;
-import dk.camelot64.kickc.model.statements.*;
 
-import java.util.LinkedHashMap;
+import java.util.ArrayList;
 import java.util.List;
 
 /**
@@ -23,7 +23,7 @@ public class ControlFlowGraphCopyVisitor extends ControlFlowGraphBaseVisitor<Obj
    /**
     * The copied blocks.
     */
-   private LinkedHashMap<LabelRef, ControlFlowBlock> copyBlockMap;
+   private List<ControlFlowBlock> copyBlockList;
 
    /**
     * The current block being copied.
@@ -39,15 +39,14 @@ public class ControlFlowGraphCopyVisitor extends ControlFlowGraphBaseVisitor<Obj
    public ControlFlowGraph visitGraph(ControlFlowGraph origGraph) {
       this.origGraph = origGraph;
       // Copy all blocks
-      this.copyBlockMap = new LinkedHashMap<>();
+      this.copyBlockList = new ArrayList<>();
       for(ControlFlowBlock origBlock : origGraph.getAllBlocks()) {
          ControlFlowBlock copyBlock = visitBlock(origBlock);
          if(copyBlock != null) {
-            copyBlockMap.put(copyBlock.getLabel(), copyBlock);
+            copyBlockList.add(copyBlock);
          }
       }
-      ControlFlowBlock copyFirstBlock = copyBlockMap.get(origGraph.getFirstBlock().getLabel());
-      ControlFlowGraph copyGraph = new ControlFlowGraph(copyBlockMap, copyFirstBlock.getLabel());
+      ControlFlowGraph copyGraph = new ControlFlowGraph(copyBlockList, origGraph.getFirstBlock().getLabel());
       return copyGraph;
    }
 
@@ -101,7 +100,7 @@ public class ControlFlowGraphCopyVisitor extends ControlFlowGraphBaseVisitor<Obj
    protected ControlFlowBlock splitCurrentBlock(LabelRef label) {
       ControlFlowBlock newBlock = new ControlFlowBlock(label, origBlock.getScope());
       this.copyBlock.setDefaultSuccessor(newBlock.getLabel());
-      this.copyBlockMap.put(this.copyBlock.getLabel(), this.copyBlock);
+      this.copyBlockList.add(this.copyBlock);
       this.copyBlock = newBlock;
       return newBlock;
    }
diff --git a/src/main/java/dk/camelot64/kickc/passes/Pass1GenerateControlFlowGraph.java b/src/main/java/dk/camelot64/kickc/passes/Pass1GenerateControlFlowGraph.java
index 9c5052a29..b2aa21906 100644
--- a/src/main/java/dk/camelot64/kickc/passes/Pass1GenerateControlFlowGraph.java
+++ b/src/main/java/dk/camelot64/kickc/passes/Pass1GenerateControlFlowGraph.java
@@ -1,6 +1,9 @@
 package dk.camelot64.kickc.passes;
 
-import dk.camelot64.kickc.model.*;
+import dk.camelot64.kickc.model.ControlFlowBlock;
+import dk.camelot64.kickc.model.ControlFlowGraph;
+import dk.camelot64.kickc.model.Program;
+import dk.camelot64.kickc.model.StatementSequence;
 import dk.camelot64.kickc.model.statements.*;
 import dk.camelot64.kickc.model.symbols.*;
 import dk.camelot64.kickc.model.values.LabelRef;
@@ -8,14 +11,14 @@ import dk.camelot64.kickc.model.values.ProcedureRef;
 import dk.camelot64.kickc.model.values.ScopeRef;
 import dk.camelot64.kickc.model.values.SymbolRef;
 
-import java.util.LinkedHashMap;
-import java.util.Map;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Stack;
 
 /** Pass that generates a control flow graph for the program */
 public class Pass1GenerateControlFlowGraph extends Pass1Base {
 
-   private Map<LabelRef, ControlFlowBlock> blocks;
+   private List<ControlFlowBlock> blocks;
 
    public Pass1GenerateControlFlowGraph(Program program) {
       super(program);
@@ -23,7 +26,7 @@ public class Pass1GenerateControlFlowGraph extends Pass1Base {
 
    @Override
    public boolean step() {
-      this.blocks = new LinkedHashMap<>();
+      this.blocks = new ArrayList<>();
       ProgramScope scope = getScope();
       StatementSequence sequence = getProgram().getStatementSequence();
       ControlFlowBlock firstBlock = getOrCreateBlock(scope.addLabel(SymbolRef.BEGIN_BLOCK_NAME).getRef(), ScopeRef.ROOT);
@@ -92,11 +95,13 @@ public class Pass1GenerateControlFlowGraph extends Pass1Base {
    }
 
    private ControlFlowBlock getOrCreateBlock(LabelRef label, ScopeRef scope) {
-      ControlFlowBlock block = blocks.get(label);
-      if(block == null) {
-         block = new ControlFlowBlock(label, scope);
-         blocks.put(block.getLabel(), block);
+      for(ControlFlowBlock block : blocks) {
+         if(block.getLabel().equals(label)) {
+            return block;
+         }
       }
+      ControlFlowBlock block = new ControlFlowBlock(label, scope);
+      blocks.add(block);
       return block;
    }
 
diff --git a/src/main/java/dk/camelot64/kickc/passes/Pass1ProcedureInline.java b/src/main/java/dk/camelot64/kickc/passes/Pass1ProcedureInline.java
new file mode 100644
index 000000000..d94f7c19c
--- /dev/null
+++ b/src/main/java/dk/camelot64/kickc/passes/Pass1ProcedureInline.java
@@ -0,0 +1,117 @@
+package dk.camelot64.kickc.passes;
+
+import dk.camelot64.kickc.model.*;
+import dk.camelot64.kickc.model.statements.Statement;
+import dk.camelot64.kickc.model.statements.StatementAssignment;
+import dk.camelot64.kickc.model.statements.StatementCall;
+import dk.camelot64.kickc.model.statements.StatementReturn;
+import dk.camelot64.kickc.model.symbols.*;
+import dk.camelot64.kickc.model.types.SymbolType;
+import dk.camelot64.kickc.model.values.LValue;
+import dk.camelot64.kickc.model.values.ProcedureRef;
+import dk.camelot64.kickc.model.values.RValue;
+import dk.camelot64.kickc.model.values.VariableRef;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.ListIterator;
+import java.util.Set;
+
+/** Pass that modifies a control flow graph to inline any procedures declared as inline */
+public class Pass1ProcedureInline extends Pass1Base  {
+
+   public Pass1ProcedureInline(Program program) {
+      super(program);
+   }
+
+   @Override
+   public boolean step() {
+      List<ControlFlowBlock> allBlocks = getGraph().getAllBlocks();
+      for(ControlFlowBlock block : allBlocks) {
+         List<Statement> blockStatements = block.getStatements();
+         ListIterator<Statement> statementsIt = blockStatements.listIterator();
+         while(statementsIt.hasNext()) {
+            Statement statement = statementsIt.next();
+            if(statement instanceof StatementCall) {
+               StatementCall call = (StatementCall) statement;
+               ProcedureRef procedureRef = call.getProcedure();
+               Procedure procedure = getScope().getProcedure(procedureRef);
+               if(procedure.isDeclaredInline()) {
+                  // Generate parameter assignments
+                  // Copy all procedure blocks
+                  // Generate return assignment
+                  throw new CompileError("Inline functions not implemented!");
+               }
+            }
+         }
+      }
+      return false;
+   }
+
+   /*
+   public StatementCall visitCall(StatementCall origCall) {
+      // Procedure strategy implemented is currently variable-based transfer of parameters/return values
+      // Generate parameter passing assignments
+      ProcedureRef procedureRef = origCall.getProcedure();
+      Procedure procedure = getScope().getProcedure(procedureRef);
+      List<Variable> parameterDecls = procedure.getParameters();
+      List<RValue> parameterValues = origCall.getParameters();
+      for(int i = 0; i < parameterDecls.size(); i++) {
+         Variable parameterDecl = parameterDecls.get(i);
+         RValue parameterValue = parameterValues.get(i);
+         addStatementToCurrentBlock(new StatementAssignment(parameterDecl.getRef(), parameterValue));
+      }
+      String procedureName = origCall.getProcedureName();
+      Variable procReturnVar = procedure.getVariable("return");
+      VariableRef procReturnVarRef = null;
+      if(procReturnVar != null) {
+         procReturnVarRef = procReturnVar.getRef();
+      }
+      StatementCall copyCall = new StatementCall(procReturnVarRef, procedureName, null);
+      copyCall.setParametersByAssignment(true);
+      copyCall.setProcedure(procedureRef);
+      addStatementToCurrentBlock(copyCall);
+      getCurrentBlock().setCallSuccessor(procedure.getLabel().getRef());
+      Symbol currentBlockSymbol = getScope().getSymbol(getCurrentBlock().getLabel());
+      Scope currentBlockScope;
+      if(currentBlockSymbol instanceof Procedure) {
+         currentBlockScope = (Scope) currentBlockSymbol;
+      } else {
+         currentBlockScope = currentBlockSymbol.getScope();
+      }
+      splitCurrentBlock(currentBlockScope.addLabelIntermediate().getRef());
+      if(!SymbolType.VOID.equals(procedure.getReturnType()) && origCall.getlValue() != null) {
+         addStatementToCurrentBlock(new StatementAssignment(origCall.getlValue(), procReturnVarRef));
+      } else {
+         // No return type. Remove variable receiving the result.
+         LValue lValue = origCall.getlValue();
+         if(lValue instanceof VariableRef) {
+            VariableRef lValueRef = (VariableRef) lValue;
+            Variable lValueVar = getScope().getVariable(lValueRef);
+            lValueVar.getScope().remove(lValueVar);
+         }
+      }
+      // Add self-assignments for all variables modified in the procedure
+      Set<VariableRef> modifiedVars = program.getProcedureModifiedVars().getModifiedVars(procedure.getRef());
+      for(VariableRef modifiedVar : modifiedVars) {
+         addStatementToCurrentBlock(new StatementAssignment(modifiedVar, modifiedVar));
+      }
+      return null;
+   }
+
+   @Override
+   public StatementReturn visitReturn(StatementReturn origReturn) {
+      ControlFlowBlock currentBlock = getCurrentBlock();
+      String currentProcName = currentBlock.getLabel().getScopeNames();
+      Procedure procedure = program.getScope().getProcedure(currentProcName);
+      // Add self-assignments for all variables modified in the procedure
+      Set<VariableRef> modifiedVars = program.getProcedureModifiedVars().getModifiedVars(procedure.getRef());
+      for(VariableRef modifiedVar : modifiedVars) {
+         addStatementToCurrentBlock(new StatementAssignment(modifiedVar, modifiedVar));
+      }
+      return super.visitReturn(origReturn);
+   }
+   */
+
+
+}
diff --git a/src/main/java/dk/camelot64/kickc/passes/Pass3PhiLifting.java b/src/main/java/dk/camelot64/kickc/passes/Pass3PhiLifting.java
index 92d66d546..96d7da596 100644
--- a/src/main/java/dk/camelot64/kickc/passes/Pass3PhiLifting.java
+++ b/src/main/java/dk/camelot64/kickc/passes/Pass3PhiLifting.java
@@ -9,10 +9,7 @@ import dk.camelot64.kickc.model.statements.StatementPhiBlock;
 import dk.camelot64.kickc.model.symbols.*;
 import dk.camelot64.kickc.model.values.LabelRef;
 
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 
 /**
  * Perform PhiLifting to greatly reduce overlapping of alive intervals for variables.
@@ -35,8 +32,10 @@ public class Pass3PhiLifting {
    public void perform() {
       ControlFlowGraph graph = program.getGraph();
       ProgramScope programScope = program.getScope();
-      Collection<ControlFlowBlock> blocks = graph.getAllBlocks();
-      for(ControlFlowBlock block : blocks) {
+      List<ControlFlowBlock> blocks = graph.getAllBlocks();
+      ListIterator<ControlFlowBlock> blocksIt = blocks.listIterator();
+      while(blocksIt.hasNext()) {
+         ControlFlowBlock block = blocksIt.next();
          // Maps old predecessors to new blocks created
          Map<LabelRef, LabelRef> newBlocks = new HashMap<>();
          if(block.hasPhiBlock()) {
@@ -73,7 +72,7 @@ public class Pass3PhiLifting {
                            Scope currentScope = programScope.getSymbol(currentBlockLabel).getScope();
                            Label newBlockLabel = currentScope.addLabelIntermediate();
                            newBlock = new ControlFlowBlock(newBlockLabel.getRef(), currentScope.getRef());
-                           graph.addBlock(newBlock);
+                           blocksIt.add(newBlock);
                            newBlock.setDefaultSuccessor(block.getLabel());
                            newBlocks.put(predecessorRef, newBlock.getLabel());
                            StatementConditionalJump previousConditionalJump = (StatementConditionalJump) lastPredecessorStatement;