Emit the check for null only if the value to check is nint constant != 0 in

ChangeLog

@@ -4,6 +4,9 @@
 	register inhibited regardless if the value was already in the
 	register or not.
 
+	* jit/jit-insn.c (jit_insn_check_null): Emit the check only if the
+	value to check is no nint constant != 0.
+
 2008-04-22  Aleksey Demakov  <ademakov@gmail.com>
 
 	* configure.in: update to modern autoconf, rename to configure.ac.

jit/jit-insn.c

@@ -1850,6 +1850,11 @@ int jit_insn_check_null(jit_function_t func, jit_value_t value)
 	{
 		return 0;
 	}
+	/* Do the check only if the value is no not Null constant */
+	if(value->is_nint_constant && (value->address != 0))
+	{
+		return 1;
+	}
 	func->builder->may_throw = 1;
 	return create_unary_note(func, JIT_OP_CHECK_NULL, value);
 }