[llvm] r254008 - [PGO] Introduce value profile data closure type.

[Xinliang David Li via llvm-commits]

Author: davidxl
Date: Tue Nov 24 13:21:15 2015
New Revision: 254008

URL: http://llvm.org/viewvc/llvm-project?rev=254008&view=rev
Log:
[PGO] Introduce value profile data closure type.

The closure is designed to abstact away two types of value profile
data:
  - InstrProfRecord which is the primary data structure used to
    represent profile data in host tools (reader, writer, and profile-use)
  - value profile runtime data structure suitable to be used by C
    runtime library.
Both sources of data need to serialize to disk/memory-buffer in common
format: ValueProfData.

The abstraction allows compiler-rt's raw profiler writer to share
the same code with indexed profile writer.


Modified:
    llvm/trunk/include/llvm/ProfileData/InstrProf.h

Modified: llvm/trunk/include/llvm/ProfileData/InstrProf.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/ProfileData/InstrProf.h?rev=254008&r1=254007&r2=254008&view=diff
==============================================================================
--- llvm/trunk/include/llvm/ProfileData/InstrProf.h (original)
+++ llvm/trunk/include/llvm/ProfileData/InstrProf.h Tue Nov 24 13:21:15 2015
@@ -538,6 +538,18 @@ typedef struct ValueProfData {
   ValueProfRecord *getFirstValueProfRecord();
 } ValueProfData;
 
+typedef struct ValueProfRecordClosure {
+  void *Record;
+  uint32_t (*GetNumValueKinds)(void *Record);
+  uint32_t (*GetNumValueSites)(void *Record, uint32_t VKind);
+  uint32_t (*GetNumValueData)(void *Record, uint32_t VKind);
+  uint32_t (*GetNumValueDataForSite)(void *R, uint32_t VK, uint32_t S);
+  uint64_t (*RemapValueData)(uint64_t Value);
+  void (*GetValueForSite)(InstrProfValueData Dst[], void *R, uint32_t K,
+                          uint32_t S);
+  ValueProfData *(*AllocateValueProfData)(size_t TotalSizeInBytes);
+} ValueProfRecordClosure;
+
 inline uint32_t getValueProfRecordHeaderSize(uint32_t NumValueSites) {
   uint32_t Size = offsetof(ValueProfRecord, SiteCountArray) +
                   sizeof(uint8_t) * NumValueSites;