From edf18107dbfedac60c94061417f37012e663d5f5 Mon Sep 17 00:00:00 2001
From: Xinliang David Li <davidxl@google.com>
Date: Sun, 3 Jan 2016 18:35:56 +0000
Subject: [PATCH] [PGO] Introduce coverage map header structure in PGO data
 template file /NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256710 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/ProfileData/InstrProf.h       |  8 +++++++-
 include/llvm/ProfileData/InstrProfData.inc | 19 +++++++++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/include/llvm/ProfileData/InstrProf.h b/include/llvm/ProfileData/InstrProf.h
index 6b2a396f9b1..49569d89507 100644
--- a/include/llvm/ProfileData/InstrProf.h
+++ b/include/llvm/ProfileData/InstrProf.h
@@ -612,8 +612,14 @@ template <class IntPtrT> struct CovMapFunctionRecord {
   #define COVMAP_FUNC_RECORD(Type, LLVMType, Name, Init) Type Name;
   #include "llvm/ProfileData/InstrProfData.inc"
 };
-LLVM_PACKED_END
+// Per module coverage mapping data header, i.e. CoverageMapFileHeader
+// documented above.
+struct CovMapHeader {
+#define COVMAP_HEADER(Type, LLVMType, Name, Init) Type Name;
+#include "llvm/ProfileData/InstrProfData.inc"
+};
 
+LLVM_PACKED_END
 }
 
 } // end namespace llvm
diff --git a/include/llvm/ProfileData/InstrProfData.inc b/include/llvm/ProfileData/InstrProfData.inc
index 48dae506cab..ab96a2b8f9b 100644
--- a/include/llvm/ProfileData/InstrProfData.inc
+++ b/include/llvm/ProfileData/InstrProfData.inc
@@ -167,6 +167,25 @@ COVMAP_FUNC_RECORD(const uint64_t, llvm::Type::getInt64Ty(Ctx), FuncHash, \
 #undef COVMAP_FUNC_RECORD
 /* COVMAP_FUNC_RECORD end.  */
 
+/* COVMAP_HEADER start */
+/* Definition of member fields of coverage map header.
+ */
+#ifndef COVMAP_HEADER
+#define COVMAP_HEADER(Type, LLVMType, Name, Initializer)
+#else
+#define INSTR_PROF_DATA_DEFINED
+#endif
+COVMAP_HEADER(uint32_t, Int32Ty, NRecords, \
+              llvm::ConstantInt::get(Int32Ty,  FunctionRecords.size()))
+COVMAP_HEADER(uint32_t, Int32Ty, FilenamesSize, \
+              llvm::ConstantInt::get(Int32Ty, FilenamesSize))
+COVMAP_HEADER(uint32_t, Int32Ty, CoverageSize, \
+              llvm::ConstantInt::get(Int32Ty, CoverageMappingSize))
+COVMAP_HEADER(uint32_t, Int32Ty, Version, \
+              llvm::ConstantInt::get(Int32Ty, CoverageMappingVersion1))
+#undef COVMAP_HEADER
+/* COVMAP_HEADER end.  */
+
 
 #ifdef INSTR_PROF_VALUE_PROF_DATA
 #define INSTR_PROF_DATA_DEFINED
-- 
2.34.1