o3: fix tick used for renaming and issue with range selection

Fixes the tick used from rename:
- previously this gathered the tick on leaving rename which was always 1 less
  than the dispatch. This conflated the decode ticks when back pressure built
  in the pipeline.
- now picks up tick on entry.

Added --store_completions flag:
- will additionally display the store completion tail in the viewer.
- this highlights periods when large numbers of stores are outstanding (>16 LSQ
  blocking)

Allows selection by tick range (previously this caused an infinite loop)

1 files changed, 4 insertions, 1 deletions

diff --git a/src/cpu/o3/fetch_impl.hh b/src/cpu/o3/fetch_impl.hh
index 07033fc8a..e0eb10334 100644
--- a/src/cpu/o3/fetch_impl.hh
+++ b/src/cpu/o3/fetch_impl.hh
@@ -60,6 +60,7 @@
 #include "debug/Activity.hh"
 #include "debug/Drain.hh"
 #include "debug/Fetch.hh"
+#include "debug/O3PipeView.hh"
 #include "mem/packet.hh"
 #include "params/DerivO3CPU.hh"
 #include "sim/byteswap.hh"
@@ -1313,7 +1314,9 @@ DefaultFetch<Impl>::fetch(bool &status_change)
             numInst++;
 
 #if TRACING_ON
-            instruction->fetchTick = curTick();
+            if (DTRACE(O3PipeView)) {
+                instruction->fetchTick = curTick();
+            }
 #endif
 
             nextPC = thisPC;