--- a/libinterp/corefcn/pt-jit.h	Tue Oct 13 11:40:05 2015 +0100
+++ b/libinterp/corefcn/pt-jit.h	Fri Feb 27 16:59:36 2015 +0100
@@ -25,12 +25,13 @@
 #if !defined (octave_pt_jit_h)
 #define octave_pt_jit_h 1
 
-#ifdef HAVE_LLVM
+#ifdef HAVE_JIT
 
 #include "jit-ir.h"
 #include "pt-walk.h"
 #include "symtab.h"
 
+
 class octave_value_list;
 
 // Convert from the parse tree (AST) to the low level Octave IR.
@@ -69,7 +70,9 @@
 
   jit_factory& get_factory (void) { return factory; }
 
+#ifdef HAVE_LLVM
   llvm::Function *get_function (void) const { return function; }
+#endif
 
   const variable_map &get_variable_map (void) const { return vmap; }
 
@@ -180,7 +183,9 @@
 
   jit_block *block;
 
+#ifdef HAVE_LLVM
   llvm::Function *function;
+#endif
 
   jit_block_list blocks;
 
@@ -242,7 +247,81 @@
   void finish_breaks (jit_block *dest, const block_list& lst);
 };
 
+// Convert from the low level Octave IR to libgccjit
+#ifdef HAVE_GCCJIT
+class
+jit_convert_gcc : public jit_ir_walker
+{
+public:
+  jit_convert_gcc ();
+  ~jit_convert_gcc ();
+
+  gcc_jit_result *convert_loop (const jit_block_list& blocks,
+                                const std::list<jit_value *>& constants);
+
+#define JIT_METH(clname)                        \
+  virtual void visit (jit_ ## clname&);
+
+  JIT_VISIT_IR_CLASSES;
+
+private:
+  void visit (jit_value *jvalue)
+  {
+    return visit (*jvalue);
+  }
+
+  void visit (jit_value &jvalue)
+  {
+    jvalue.accept (*this);
+  }
+
+#if 0
+  gccjit::lvalue as_lvalue (jit_value *);
+#endif
+  gccjit::rvalue as_rvalue (jit_value *);
+
+  void add_assignment_for_insn (jit_instruction &insn,
+                                gccjit::rvalue val);
+
+  gccjit::block get_block_for_edge (jit_block *src, jit_block *dest);
+
+  gccjit::block get_current_block ();
+  void push_block (gccjit::block block);
+  void pop_block ();
+
+  bool converting_function;
+
+  // Inputs (used internally by callback):
+  const jit_block_list *m_blocks;
+  const std::list<jit_value *> *m_constants;
+
+  // Internal state:
+  gccjit::context m_ctxt;
+  gccjit::function m_func;
+
+  /* We have a single param, confusingly named "params" (an array).  */
+  gccjit::param params;
+
+  // name -> argument index (used for compiling functions)
+  std::map<std::string, int> m_argument_index;
+  std::vector<std::pair<std::string, bool> > m_argument_vec;
+
+  std::vector<gccjit::lvalue> m_extracted_params;
+  std::map<jit_block *, gccjit::block> m_block_map;
+  std::map<std::pair<jit_block *, jit_block *>, gccjit::block> m_blocks_for_edges;
+  std::map<jit_instruction *, gccjit::lvalue> m_locals_for_insns;
+
+  std::map<jit_value *, gccjit::rvalue> m_rvalues;
+
+  std::stack<gccjit::block> m_block_stack;
+
+  bool m_with_comments;
+  bool m_log_visits;
+};
+#endif // #ifdef HAVE_GCCJIT
+
 // Convert from the low level Octave IR to LLVM
+#if HAVE_LLVM
 class
 jit_convert_llvm : public jit_ir_walker
 {
@@ -299,6 +378,7 @@
     jvalue.accept (*this);
   }
 };
+#endif /* HAVE_LLVM */
 
 // type inference and SSA construction on the low level Octave IR
 class
@@ -362,11 +442,13 @@
   static bool execute (octave_user_function& fcn, const octave_value_list& args,
                        octave_value_list& retval);
 
+#ifdef HAVE_LLVM
   llvm::ExecutionEngine *get_engine (void) const { return engine; }
 
   llvm::Module *get_module (void) const { return module; }
 
   void optimize (llvm::Function *fn);
+#endif
 private:
   tree_jit (void);
 
@@ -385,6 +467,7 @@
 
   size_t trip_count (const octave_value& bounds) const;
 
+#ifdef HAVE_LLVM
   llvm::Module *module;
 #ifdef LEGACY_PASSMANAGER
   llvm::legacy::PassManager *module_pass_manager;
@@ -394,6 +477,7 @@
   llvm::FunctionPassManager *pass_manager;
 #endif
   llvm::ExecutionEngine *engine;
+#endif
 };
 
 class
@@ -439,13 +523,19 @@
 
   octave_value find (const vmap& extra_vars, const std::string& vname) const;
 
+#ifdef HAVE_LLVM
   llvm::ExecutionEngine *engine;
+#endif
   jited_function function;
+#ifdef HAVE_LLVM
   llvm::Function *llvm_function;
-
+#endif
+#ifdef HAVE_GCCJIT
+  gcc_jit_result *gccjit_result;
+#endif
   std::vector<std::pair<std::string, bool> > arguments;
   type_bound_vector bounds;
 };
 
+#endif /* ifdef HAVE_JIT */
 #endif
-#endif