Remerged dmd2 frontend using git subtree

dmd2/irstate.h

@@ -0,0 +1,59 @@
+
+// Compiler implementation of the D programming language
+// Copyright (c) 1999-2011 by Digital Mars
+// All Rights Reserved
+// written by Walter Bright
+// http://www.digitalmars.com
+
+#ifndef DMD_CONTEXT_H
+#define DMD_CONTEXT_H
+
+#ifdef __DMC__
+#pragma once
+#endif /* __DMC__ */
+
+struct Module;
+struct Statement;
+struct block;
+struct Dsymbol;
+struct Identifier;
+struct Symbol;
+struct FuncDeclaration;
+struct Blockx;
+struct elem;
+#include "arraytypes.h"
+
+struct IRState
+{
+    IRState *prev;
+    Statement *statement;
+    Module *m;                  // module
+    Dsymbol *symbol;
+    Identifier *ident;
+    Symbol *shidden;            // hidden parameter to function
+    Symbol *sthis;              // 'this' parameter to function (member and nested)
+    Symbol *sclosure;           // pointer to closure instance
+    Blockx *blx;
+    Dsymbols *deferToObj;       // array of Dsymbol's to run toObjFile(int multiobj) on later
+    elem *ehidden;              // transmit hidden pointer to CallExp::toElem()
+    Symbol *startaddress;
+    VarDeclarations *varsInScope; // variables that are in scope that will need destruction later
+
+    block *breakBlock;
+    block *contBlock;
+    block *switchBlock;
+    block *defaultBlock;
+
+    IRState(IRState *irs, Statement *s);
+    IRState(IRState *irs, Dsymbol *s);
+    IRState(Module *m, Dsymbol *s);
+
+    block *getBreakBlock(Identifier *ident);
+    block *getContBlock(Identifier *ident);
+    block *getSwitchBlock();
+    block *getDefaultBlock();
+    FuncDeclaration *getFunc();
+    int arrayBoundsCheck();
+};
+
+#endif /* DMD_CONTEXT_H */