From c81278e2a4bc26d3fd503ea75fd625c062e5fe43 Mon Sep 17 00:00:00 2001 From: Quentin Colombet Date: Fri, 23 Sep 2016 18:38:06 +0000 Subject: [PATCH] [RegisterBankInfo] Add statistics for dynamic partial mappings. Collect statistics about the number of partial mappings dynamically allocated and accessed. Ultimately, when the whole TableGen infrastructure is set, those numbers should be zero. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282274 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/GlobalISel/RegisterBankInfo.cpp | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/lib/CodeGen/GlobalISel/RegisterBankInfo.cpp b/lib/CodeGen/GlobalISel/RegisterBankInfo.cpp index 88e47f6fb89..b52e0985398 100644 --- a/lib/CodeGen/GlobalISel/RegisterBankInfo.cpp +++ b/lib/CodeGen/GlobalISel/RegisterBankInfo.cpp @@ -13,6 +13,7 @@ #include "llvm/CodeGen/GlobalISel/RegisterBankInfo.h" #include "llvm/ADT/SmallString.h" #include "llvm/ADT/SmallVector.h" +#include "llvm/ADT/Statistic.h" #include "llvm/ADT/iterator_range.h" #include "llvm/CodeGen/GlobalISel/RegisterBank.h" #include "llvm/CodeGen/MachineBasicBlock.h" @@ -32,6 +33,11 @@ using namespace llvm; +STATISTIC(NumPartialMappingsCreated, + "Number of partial mappings dynamically created"); +STATISTIC(NumPartialMappingsAccessed, + "Number of partial mappings dynamically accessed"); + const unsigned RegisterBankInfo::DefaultMappingID = UINT_MAX; const unsigned RegisterBankInfo::InvalidMappingID = UINT_MAX - 1; @@ -309,10 +315,15 @@ RegisterBankInfo::getInstrMappingImpl(const MachineInstr &MI) const { const RegisterBankInfo::PartialMapping & RegisterBankInfo::getPartialMapping(unsigned StartIdx, unsigned Length, const RegisterBank &RegBank) const { + ++NumPartialMappingsAccessed; + hash_code Hash = hash_combine(StartIdx, Length, RegBank.getID()); const auto &It = MapOfPartialMappings.find(Hash); if (It != MapOfPartialMappings.end()) return It->second; + + ++NumPartialMappingsCreated; + PartialMapping &PartMapping = MapOfPartialMappings[Hash]; PartMapping = PartialMapping{StartIdx, Length, RegBank}; return PartMapping; -- 2.50.1