Check trip count before compiling for loops. * src/jit-typeinfo.cc (octave_jit_cast_any_range, octave_jit_cast_range_any): New function. (octave_jit_paren_subsasgn_impl): Add return argument. (jit_typeinfo::jit_typeinfo): Update octave_jit_paren_subsasgn_impl call and add any <-> range casts. * src/pt-eval.cc (tree_evaluator::visit_simple_for_command): Try jit after computing loop bounds. * src/pt-jit.cc (jit_convert::jit_convert): Add and handle for bounds argument. (jit_convert::visit_binary_expression): Use next_shortcircut_result. (jit_convert::visit_simple_for_command): Use next_iterator and check for precomputed bounds. (jit_convert::find_variable, jit_convert::create_variable, jit_convert::next_name, tree_jit::trip_count, jit_info::initialize, jit_info::find): New function. (jit_convert::get_variable): Use find_variable and create_variable. (tree_jit::execute): Allow for precomputed loop bounds and check trip count. (jit_info::jit_info): Added new overload and defer work to initialize. (jit_info::execute): Support precomputed bounds. (jit_info::match): Support precomputed bounds. * src/pt-jit.h (jit_convert::jit_convert, jit_convert::execute, jit_info::execute, jit_info::match): New parameter. (jit_convert::find_variable, jit_convert::create_variable, tree_jit::trip_count, jit_info::initialize, jit_info::find): New declaration. (jit_convert::next_iterator, jit_convert::next_for_bounds, jit_convert::next_shortcircut_result, jit_convert::next_name): New function.

--- a/src/pt-eval.cc	Mon Jul 23 12:18:07 2012 +0400
+++ b/src/pt-eval.cc	Thu Jul 26 17:03:15 2012 -0500
@@ -296,11 +296,6 @@
   if (debug_mode)
     do_breakpoint (cmd.is_breakpoint ());
 
-#if HAVE_LLVM
-  if (jiter.execute (cmd))
-    return;
-#endif
-
   // FIXME -- need to handle PARFOR loops here using cmd.in_parallel ()
   // and cmd.maxproc_expr ();
 
@@ -314,6 +309,11 @@
 
   octave_value rhs = expr->rvalue1 ();
 
+#if HAVE_LLVM
+  if (jiter.execute (cmd, rhs))
+    return;
+#endif
+
   if (error_state || rhs.is_undefined ())
     return;