Stop JIT on interrupt * jit-ir.cc (jit_call::needs_release): Move to cc file and do not release artificial assigns. (jit_error_check::variable_to_strign): New function. (jit_error_check::print): Move to cc file and improve output. * jit-ir.h (jit_call::needs_release): Move to cc file. (jit_error_check::variable): New enum. (jit_error_check::variable_to_string): New declaration. (jit_error_check::jit_error_check): Add variable argument and new overload. (jit_error_check::check_variable, jit_error_check::has_check_for): New function. (jit_error_check::check_for): Ensure has_check_for is true. (jit_error_check::print): Move to cc file. (jit_error_check::check_alive): Always true if has_check_for is false. (jit_error_check::mvariable): New variable. * jit-typeinfo.cc (jit_typeinfo::jit_typeinfo): Initialize loctave_interrupt_state and fix name of cast to any. (jit_typeinfo::do_insert_interrupt_check): New function. * jit-typeinfo.h (jit_typeinfo::insert_interrupt_check): New function. (jit_typeinfo::do_insert_interrupt_check): New declaration. (jit_typeinfo::loctave_interrupt_state): New variable. * pt-jit.cc (jit_convert::visit_simple_for_command, jit_convert::visit_while_command): Check interrupt state. (jit_convert::create_check_impl): Specify var_error_state check. (jit_convert_llvm::visit): Generate var_interrupt error check. (jit_function_info::execute, jit_info::execute): Call octave_quit.

--- a/libinterp/interp-core/jit-typeinfo.h	Sun Nov 04 20:09:23 2012 -0700
+++ b/libinterp/interp-core/jit-typeinfo.h	Sun Nov 04 21:11:33 2012 -0700
@@ -566,6 +566,11 @@
     return instance->do_insert_error_check (bld);
   }
 
+  static llvm::Value *insert_interrupt_check (llvm::IRBuilderD& bld)
+  {
+    return instance->do_insert_interrupt_check (bld);
+  }
+
   static const jit_operation& end (void)
   {
     return instance->end_fn;
@@ -692,6 +697,8 @@
 
   llvm::Value *do_insert_error_check (llvm::IRBuilderD& bld);
 
+  llvm::Value *do_insert_interrupt_check (llvm::IRBuilderD& bld);
+
   void add_builtin (const std::string& name);
 
   void register_intrinsic (const std::string& name, size_t id,
@@ -747,6 +754,9 @@
   int next_id;
 
   llvm::GlobalVariable *lerror_state;
+  llvm::GlobalVariable *loctave_interrupt_state;
+
+  llvm::Type *sig_atomic_type;
 
   std::vector<jit_type*> id_to_type;
   jit_type *any;