[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.

llvm-svn: 254008

1 files changed, 12 insertions, 0 deletions

diff --git a/llvm/include/llvm/ProfileData/InstrProf.h b/llvm/include/llvm/ProfileData/InstrProf.h
index 5ec7d65773c..20d1574b309 100644
--- a/llvm/include/llvm/ProfileData/InstrProf.h
+++ b/llvm/include/llvm/ProfileData/InstrProf.h
@@ -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;