CodeGen: Use LLVM's InstrProfReader in -fprofile-instr-use=

Update clang to use the InstrProfReader from LLVM to read
instrumentation based profile data. This also switches us from the
naive text format to the binary format, since that's what's
implemented in the reader.

llvm-svn: 206658

1 files changed, 3 insertions, 24 deletions

diff --git a/clang/lib/CodeGen/CodeGenPGO.h b/clang/lib/CodeGen/CodeGenPGO.h
index c59a58e3f89..98e5b1fd1ac 100644
--- a/clang/lib/CodeGen/CodeGenPGO.h
+++ b/clang/lib/CodeGen/CodeGenPGO.h
@@ -26,28 +26,6 @@ namespace clang {
 namespace CodeGen {
 class RegionCounter;
 
-/// The raw counter data from an instrumented PGO binary
-class PGOProfileData {
-private:
-  /// The PGO data
-  std::unique_ptr<llvm::MemoryBuffer> DataBuffer;
-  /// Offsets into DataBuffer for each function's counters
-  llvm::StringMap<unsigned> DataOffsets;
-  /// Execution counts for each function.
-  llvm::StringMap<uint64_t> FunctionCounts;
-  /// The maximal execution count among all functions.
-  uint64_t MaxFunctionCount;
-  CodeGenModule &CGM;
-public:
-  PGOProfileData(CodeGenModule &CGM, std::string Path);
-  /// Fill Counts with the profile data for the given function name. Returns
-  /// false on success.
-  bool getFunctionCounts(StringRef FuncName, uint64_t &FuncHash,
-                         std::vector<uint64_t> &Counts);
-  /// Return the maximum of all known function counts.
-  uint64_t getMaximumFunctionCount() { return MaxFunctionCount; }
-};
-
 /// Per-function PGO state. This class should generally not be used directly,
 /// but instead through the CodeGenFunction and RegionCounter types.
 class CodeGenPGO {
@@ -138,8 +116,9 @@ private:
   void setFuncName(llvm::Function *Fn);
   void mapRegionCounters(const Decl *D);
   void computeRegionCounts(const Decl *D);
-  void applyFunctionAttributes(PGOProfileData *PGOData, llvm::Function *Fn);
-  void loadRegionCounts(PGOProfileData *PGOData);
+  void applyFunctionAttributes(llvm::IndexedInstrProfReader *PGOReader,
+                               llvm::Function *Fn);
+  void loadRegionCounts(llvm::IndexedInstrProfReader *PGOReader);
   void emitCounterVariables();
   llvm::GlobalVariable *buildDataVar();