From: Xinliang David Li <davidxl@google.com>
Date: Fri, 4 Dec 2015 01:02:10 +0000 (+0000)
Subject: [PGO] Unify VP data format between raw and indexed profile (Reader)
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=commitdiff_plain;h=7579d3aaed060dd8002e11f9c64f27508ec32f3c

[PGO] Unify VP data format between raw and indexed profile (Reader)

With the latest refactoring and code sharing patches landed,
it is possible to unify the value profile implementation between
raw and indexed profile. This is the patch in raw profile reader
that uses the common interface.

Differential Revision: http://reviews.llvm.org/D15056


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254677 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/ProfileData/InstrProfReader.h b/include/llvm/ProfileData/InstrProfReader.h
index 49233366e16..318981f75e1 100644
--- a/include/llvm/ProfileData/InstrProfReader.h
+++ b/include/llvm/ProfileData/InstrProfReader.h
@@ -162,10 +162,19 @@ public:
 private:
   std::error_code readNextHeader(const char *CurrentPos);
   std::error_code readHeader(const RawInstrProf::Header &Header);
-  template <class IntT>
-  IntT swap(IntT Int) const {
+  template <class IntT> IntT swap(IntT Int) const {
     return ShouldSwapBytes ? sys::getSwappedBytes(Int) : Int;
   }
+  support::endianness getDataEndianness() const {
+    support::endianness HostEndian = getHostEndianness();
+    if (!ShouldSwapBytes)
+      return HostEndian;
+    if (HostEndian == support::little)
+      return support::big;
+    else
+      return support::little;
+  }
+
   inline uint8_t getNumPaddingBytes(uint64_t SizeInBytes) {
     return 7 & (sizeof(uint64_t) - SizeInBytes % sizeof(uint64_t));
   }
diff --git a/lib/ProfileData/InstrProfReader.cpp b/lib/ProfileData/InstrProfReader.cpp
index cfc96873980..7683cad6ede 100644
--- a/lib/ProfileData/InstrProfReader.cpp
+++ b/lib/ProfileData/InstrProfReader.cpp
@@ -296,55 +296,28 @@ std::error_code RawInstrProfReader<IntPtrT>::readRawCounts(
 }
 
 template <class IntPtrT>
-std::error_code RawInstrProfReader<IntPtrT>::readValueProfilingData(
-    InstrProfRecord &Record) {
+std::error_code
+RawInstrProfReader<IntPtrT>::readValueProfilingData(InstrProfRecord &Record) {
 
   Record.clearValueData();
   if (!Data->Values || (ValueDataDelta == 0))
     return success();
 
-  // Read value data.
-  uint64_t NumVSites = 0;
-  for (uint32_t Kind = IPVK_First; Kind <= ValueKindLast; ++Kind)
-    NumVSites += swap(Data->NumValueSites[Kind]);
-  NumVSites += getNumPaddingBytes(NumVSites);
+  ErrorOr<std::unique_ptr<ValueProfData>> VDataPtrOrErr =
+      ValueProfData::getValueProfData(getValueDataCounts(Data->Values),
+                                      (const unsigned char *)ProfileEnd,
+                                      getDataEndianness());
 
-  auto VDataCounts = makeArrayRef(getValueDataCounts(Data->Values), NumVSites);
-  // Check bounds.
-  if (VDataCounts.data() < ValueDataStart ||
-      VDataCounts.data() + VDataCounts.size() >
-          reinterpret_cast<const uint8_t *>(ProfileEnd))
-    return error(instrprof_error::malformed);
+  if (VDataPtrOrErr.getError())
+    return VDataPtrOrErr.getError();
 
-  const InstrProfValueData *VDataPtr =
-      getValueData(swap(Data->Values) + NumVSites);
-  for (uint32_t Kind = IPVK_First; Kind <= ValueKindLast; ++Kind) {
-    NumVSites = swap(Data->NumValueSites[Kind]);
-    Record.reserveSites(Kind, NumVSites);
-    for (uint32_t VSite = 0; VSite < NumVSites; ++VSite) {
-
-      uint32_t VDataCount = VDataCounts[VSite];
-      if ((const char *)(VDataPtr + VDataCount) > ProfileEnd)
-        return error(instrprof_error::malformed);
-
-      std::vector<InstrProfValueData> CurrentValues;
-      CurrentValues.reserve(VDataCount);
-      for (uint32_t VIndex = 0; VIndex < VDataCount; ++VIndex) {
-        uint64_t TargetValue = swap(VDataPtr->Value);
-        uint64_t Count = swap(VDataPtr->Count);
-        CurrentValues.push_back({TargetValue, Count});
-        ++VDataPtr;
-      }
-      Record.addValueData(Kind, VSite, CurrentValues.data(),
-                          VDataCount, &FunctionPtrToNameMap);
-    }
-  }
+  VDataPtrOrErr.get()->deserializeTo(Record, &FunctionPtrToNameMap);
   return success();
 }
 
 template <class IntPtrT>
-std::error_code RawInstrProfReader<IntPtrT>::readNextRecord(
-    InstrProfRecord &Record) {
+std::error_code
+RawInstrProfReader<IntPtrT>::readNextRecord(InstrProfRecord &Record) {
   if (atEnd())
     if (std::error_code EC = readNextHeader(ProfileEnd))
       return EC;