Moved IRTargetScopeS from IRState into IrFunction, fixes #240 .

ir/irfunction.h

@@ -9,6 +9,26 @@
 #include <stack>
 #include <map>
 
+struct Statement;
+struct EnclosingHandler;
+
+// scope statements that can be target of jumps
+// includes loops, switch, case, labels
+struct IRTargetScope
+{
+    // generating statement
+    Statement* s;
+    
+    // the try of a TryFinally that encloses the loop
+    EnclosingHandler* enclosinghandler;
+    
+    llvm::BasicBlock* breakTarget;
+    llvm::BasicBlock* continueTarget;
+
+    IRTargetScope();
+    IRTargetScope(Statement* s, EnclosingHandler* enclosinghandler, llvm::BasicBlock* continueTarget, llvm::BasicBlock* breakTarget);
+};
+
 // represents a function
 struct IrFunction : IrBase
 {
@@ -48,6 +68,11 @@ struct IrFunction : IrBase
     // landing pads for try statements
     IRLandingPad landingPad;
 
+    // loop blocks
+    typedef std::vector<IRTargetScope> TargetScopeVec;
+    TargetScopeVec targetScopes;
+
+    // constructor
     IrFunction(FuncDeclaration* fd);
 
     // annotations