arch: Use const StaticInstPtr references where possible

This patch optimises the passing of StaticInstPtr by avoiding copying
the reference-counting pointer. This avoids first incrementing and
then decrementing the reference-counting pointer.

1 files changed, 3 insertions, 2 deletions

diff --git a/src/cpu/o3/dyn_inst.hh b/src/cpu/o3/dyn_inst.hh
index ea961092d..80d502f0e 100644
--- a/src/cpu/o3/dyn_inst.hh
+++ b/src/cpu/o3/dyn_inst.hh
@@ -83,12 +83,13 @@ class BaseO3DynInst : public BaseDynInst<Impl>
 
   public:
     /** BaseDynInst constructor given a binary instruction. */
-    BaseO3DynInst(StaticInstPtr staticInst, StaticInstPtr macroop,
+    BaseO3DynInst(const StaticInstPtr &staticInst, const StaticInstPtr &macroop,
                   TheISA::PCState pc, TheISA::PCState predPC,
                   InstSeqNum seq_num, O3CPU *cpu);
 
     /** BaseDynInst constructor given a static inst pointer. */
-    BaseO3DynInst(StaticInstPtr _staticInst, StaticInstPtr _macroop);
+    BaseO3DynInst(const StaticInstPtr &_staticInst,
+                  const StaticInstPtr &_macroop);
 
     ~BaseO3DynInst();