adding support for the trace split

Author: mkhairy

src/gpgpu-sim/shader.h

@@ -238,6 +238,7 @@ class shd_warp_t {
   unsigned get_dynamic_warp_id() const { return m_dynamic_warp_id; }
   unsigned get_warp_id() const { return m_warp_id; }
 
+  class shader_core_ctx * get_shader() { return m_shader; }
  private:
   static const unsigned IBUFFER_SIZE = 2;
   class shader_core_ctx *m_shader;
@@ -2129,7 +2130,7 @@ class shader_core_ctx : public core_t {
   friend class scheduler_unit;  // this is needed to use private issue warp.
   friend class TwoLevelScheduler;
   friend class LooseRoundRobbinScheduler;
-  void issue_warp(register_set &warp, const warp_inst_t *pI,
+  virtual void issue_warp(register_set &warp, const warp_inst_t *pI,
                   const active_mask_t &active_mask, unsigned warp_id,
                   unsigned sch_id);