[llvm] r282325 - [RegisterBankInfo] Add statistics for dynamic value mappings.

[Quentin Colombet via llvm-commits]

Author: qcolombet
Date: Fri Sep 23 23:53:55 2016
New Revision: 282325

URL: http://llvm.org/viewvc/llvm-project?rev=282325&view=rev
Log:
[RegisterBankInfo] Add statistics for dynamic value mappings.

Like partial mappings, as we move toward TableGen'ed information, the
number should reach zero eventually.

Modified:
    llvm/trunk/lib/CodeGen/GlobalISel/RegisterBankInfo.cpp

Modified: llvm/trunk/lib/CodeGen/GlobalISel/RegisterBankInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/GlobalISel/RegisterBankInfo.cpp?rev=282325&r1=282324&r2=282325&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/GlobalISel/RegisterBankInfo.cpp (original)
+++ llvm/trunk/lib/CodeGen/GlobalISel/RegisterBankInfo.cpp Fri Sep 23 23:53:55 2016
@@ -37,6 +37,10 @@ STATISTIC(NumPartialMappingsCreated,
           "Number of partial mappings dynamically created");
 STATISTIC(NumPartialMappingsAccessed,
           "Number of partial mappings dynamically accessed");
+STATISTIC(NumValueMappingsCreated,
+          "Number of value mappings dynamically created");
+STATISTIC(NumValueMappingsAccessed,
+          "Number of value mappings dynamically accessed");
 
 const unsigned RegisterBankInfo::DefaultMappingID = UINT_MAX;
 const unsigned RegisterBankInfo::InvalidMappingID = UINT_MAX - 1;
@@ -364,10 +368,14 @@ RegisterBankInfo::getValueMapping(const
     Hash = hash_combine_range(Hashes.begin(), Hashes.end());
   }
 
+  ++NumValueMappingsAccessed;
+
   const auto &It = MapOfValueMappings.find(Hash);
   if (It != MapOfValueMappings.end())
     return *It->second;
 
+  ++NumValueMappingsCreated;
+
   ValueMapping *&ValMapping = MapOfValueMappings[Hash];
   ValMapping = new ValueMapping{BreakDown, NumBreakDowns};
   return *ValMapping;