[llvm] [NFC] In InstrProf, generalize helper functions to take 'GlobalObject'. They currently take 'Functions' as function parameters or have 'Func' in the name. (PR #70287)
Mingming Liu via llvm-commits
llvm-commits at lists.llvm.org
Thu Oct 26 14:05:37 PDT 2023
https://github.com/minglotus-6 updated https://github.com/llvm/llvm-project/pull/70287
>From 04ead27f0dd8e0e444187abe8a88163ebd70df73 Mon Sep 17 00:00:00 2001
From: Mingming Liu <mingmingl at google.com>
Date: Wed, 25 Oct 2023 21:05:14 -0700
Subject: [PATCH 1/7] [NFC]Rename collectPGOFuncNameStrings to
collectGlobalVariableNameStrings
- Do the rename in a standalone patch since the method is used in non-llvm codebase. It's easier to rollback this NFC in case rename in that codebase takes longer.
---
llvm/include/llvm/ProfileData/InstrProf.h | 8 ++++----
llvm/lib/ProfileData/InstrProf.cpp | 2 +-
llvm/unittests/ProfileData/InstrProfTest.cpp | 4 ++--
3 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/llvm/include/llvm/ProfileData/InstrProf.h b/llvm/include/llvm/ProfileData/InstrProf.h
index f9096b46157200b..7832b4fbf35cc71 100644
--- a/llvm/include/llvm/ProfileData/InstrProf.h
+++ b/llvm/include/llvm/ProfileData/InstrProf.h
@@ -220,8 +220,8 @@ StringRef getPGOFuncNameVarInitializer(GlobalVariable *NameVar);
StringRef getFuncNameWithoutPrefix(StringRef PGOFuncName,
StringRef FileName = "<unknown>");
-/// Given a vector of strings (function PGO names) \c NameStrs, the
-/// method generates a combined string \c Result that is ready to be
+/// Given a vector of strings (names of global variables) \c NameStrs,
+/// the method generates a combined string \c Result that is ready to be
/// serialized. The \c Result string is comprised of three fields:
/// The first field is the length of the uncompressed strings, and the
/// the second field is the length of the zlib-compressed string.
@@ -229,8 +229,8 @@ StringRef getFuncNameWithoutPrefix(StringRef PGOFuncName,
/// third field is the uncompressed strings; otherwise it is the
/// compressed string. When the string compression is off, the
/// second field will have value zero.
-Error collectPGOFuncNameStrings(ArrayRef<std::string> NameStrs,
- bool doCompression, std::string &Result);
+Error collectGlobalVariableNameStrings(ArrayRef<std::string> NameStrs,
+ bool doCompression, std::string &Result);
/// Produce \c Result string with the same format described above. The input
/// is vector of PGO function name variables that are referenced.
diff --git a/llvm/lib/ProfileData/InstrProf.cpp b/llvm/lib/ProfileData/InstrProf.cpp
index e82cb5c535f1f5a..963d4703395b35b 100644
--- a/llvm/lib/ProfileData/InstrProf.cpp
+++ b/llvm/lib/ProfileData/InstrProf.cpp
@@ -545,7 +545,7 @@ Error collectPGOFuncNameStrings(ArrayRef<GlobalVariable *> NameVars,
for (auto *NameVar : NameVars) {
NameStrs.push_back(std::string(getPGOFuncNameVarInitializer(NameVar)));
}
- return collectPGOFuncNameStrings(
+ return collectGlobalVariableNameStrings(
NameStrs, compression::zlib::isAvailable() && doCompression, Result);
}
diff --git a/llvm/unittests/ProfileData/InstrProfTest.cpp b/llvm/unittests/ProfileData/InstrProfTest.cpp
index 76f88c058424d03..378795bd724b588 100644
--- a/llvm/unittests/ProfileData/InstrProfTest.cpp
+++ b/llvm/unittests/ProfileData/InstrProfTest.cpp
@@ -1368,7 +1368,7 @@ TEST_P(MaybeSparseInstrProfTest, instr_prof_symtab_compression_test) {
for (bool DoCompression : {false, true}) {
// Compressing:
std::string FuncNameStrings1;
- EXPECT_THAT_ERROR(collectPGOFuncNameStrings(
+ EXPECT_THAT_ERROR(collectGlobalVariableNameStrings(
FuncNames1,
(DoCompression && compression::zlib::isAvailable()),
FuncNameStrings1),
@@ -1376,7 +1376,7 @@ TEST_P(MaybeSparseInstrProfTest, instr_prof_symtab_compression_test) {
// Compressing:
std::string FuncNameStrings2;
- EXPECT_THAT_ERROR(collectPGOFuncNameStrings(
+ EXPECT_THAT_ERROR(collectGlobalVariableNameStrings(
FuncNames2,
(DoCompression && compression::zlib::isAvailable()),
FuncNameStrings2),
>From 001790783c558f597e8d4abcce46d9e68658f906 Mon Sep 17 00:00:00 2001
From: Mingming Liu <mingmingl at google.com>
Date: Wed, 25 Oct 2023 21:14:49 -0700
Subject: [PATCH 2/7] Address comments and update another callsite (in
InstrProfCorrelator.cpp) that calls this function.
---
llvm/include/llvm/ProfileData/InstrProf.h | 4 ++--
llvm/lib/ProfileData/InstrProf.cpp | 6 +++---
llvm/lib/ProfileData/InstrProfCorrelator.cpp | 2 +-
llvm/unittests/ProfileData/InstrProfTest.cpp | 4 ++--
4 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/llvm/include/llvm/ProfileData/InstrProf.h b/llvm/include/llvm/ProfileData/InstrProf.h
index 7832b4fbf35cc71..a92e82b446fca76 100644
--- a/llvm/include/llvm/ProfileData/InstrProf.h
+++ b/llvm/include/llvm/ProfileData/InstrProf.h
@@ -229,8 +229,8 @@ StringRef getFuncNameWithoutPrefix(StringRef PGOFuncName,
/// third field is the uncompressed strings; otherwise it is the
/// compressed string. When the string compression is off, the
/// second field will have value zero.
-Error collectGlobalVariableNameStrings(ArrayRef<std::string> NameStrs,
- bool doCompression, std::string &Result);
+Error collectGlobalObjectNameStrings(ArrayRef<std::string> NameStrs,
+ bool doCompression, std::string &Result);
/// Produce \c Result string with the same format described above. The input
/// is vector of PGO function name variables that are referenced.
diff --git a/llvm/lib/ProfileData/InstrProf.cpp b/llvm/lib/ProfileData/InstrProf.cpp
index 963d4703395b35b..db9b111d37c2fc3 100644
--- a/llvm/lib/ProfileData/InstrProf.cpp
+++ b/llvm/lib/ProfileData/InstrProf.cpp
@@ -494,8 +494,8 @@ void InstrProfSymtab::dumpNames(raw_ostream &OS) const {
OS << S << '\n';
}
-Error collectPGOFuncNameStrings(ArrayRef<std::string> NameStrs,
- bool doCompression, std::string &Result) {
+Error collectGlobalObjectNameStrings(ArrayRef<std::string> NameStrs,
+ bool doCompression, std::string &Result) {
assert(!NameStrs.empty() && "No name data to emit");
uint8_t Header[20], *P = Header;
@@ -545,7 +545,7 @@ Error collectPGOFuncNameStrings(ArrayRef<GlobalVariable *> NameVars,
for (auto *NameVar : NameVars) {
NameStrs.push_back(std::string(getPGOFuncNameVarInitializer(NameVar)));
}
- return collectGlobalVariableNameStrings(
+ return collectGlobalObjectNameStrings(
NameStrs, compression::zlib::isAvailable() && doCompression, Result);
}
diff --git a/llvm/lib/ProfileData/InstrProfCorrelator.cpp b/llvm/lib/ProfileData/InstrProfCorrelator.cpp
index 71787c9bd8577b4..f298fcab1220cfd 100644
--- a/llvm/lib/ProfileData/InstrProfCorrelator.cpp
+++ b/llvm/lib/ProfileData/InstrProfCorrelator.cpp
@@ -152,7 +152,7 @@ Error InstrProfCorrelatorImpl<IntPtrT>::correlateProfileData(int MaxWarnings) {
instrprof_error::unable_to_correlate_profile,
"could not find any profile metadata in debug info");
auto Result =
- collectPGOFuncNameStrings(NamesVec, /*doCompression=*/false, Names);
+ collectGlobalObjectNameStrings(NamesVec, /*doCompression=*/false, Names);
CounterOffsets.clear();
NamesVec.clear();
return Result;
diff --git a/llvm/unittests/ProfileData/InstrProfTest.cpp b/llvm/unittests/ProfileData/InstrProfTest.cpp
index 378795bd724b588..4e1786597b39674 100644
--- a/llvm/unittests/ProfileData/InstrProfTest.cpp
+++ b/llvm/unittests/ProfileData/InstrProfTest.cpp
@@ -1368,7 +1368,7 @@ TEST_P(MaybeSparseInstrProfTest, instr_prof_symtab_compression_test) {
for (bool DoCompression : {false, true}) {
// Compressing:
std::string FuncNameStrings1;
- EXPECT_THAT_ERROR(collectGlobalVariableNameStrings(
+ EXPECT_THAT_ERROR(collectGlobalObjectNameStrings(
FuncNames1,
(DoCompression && compression::zlib::isAvailable()),
FuncNameStrings1),
@@ -1376,7 +1376,7 @@ TEST_P(MaybeSparseInstrProfTest, instr_prof_symtab_compression_test) {
// Compressing:
std::string FuncNameStrings2;
- EXPECT_THAT_ERROR(collectGlobalVariableNameStrings(
+ EXPECT_THAT_ERROR(collectGlobalObjectNameStrings(
FuncNames2,
(DoCompression && compression::zlib::isAvailable()),
FuncNameStrings2),
>From 569b70a87f0f7831042240451d7f2db3cf5bde37 Mon Sep 17 00:00:00 2001
From: Mingming Liu <mingmingl at google.com>
Date: Wed, 25 Oct 2023 21:54:44 -0700
Subject: [PATCH 3/7] update function comment
---
llvm/include/llvm/ProfileData/InstrProf.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/llvm/include/llvm/ProfileData/InstrProf.h b/llvm/include/llvm/ProfileData/InstrProf.h
index a92e82b446fca76..61f9bae1a83f775 100644
--- a/llvm/include/llvm/ProfileData/InstrProf.h
+++ b/llvm/include/llvm/ProfileData/InstrProf.h
@@ -220,7 +220,7 @@ StringRef getPGOFuncNameVarInitializer(GlobalVariable *NameVar);
StringRef getFuncNameWithoutPrefix(StringRef PGOFuncName,
StringRef FileName = "<unknown>");
-/// Given a vector of strings (names of global variables) \c NameStrs,
+/// Given a vector of strings (names of global objects, like func PGO names, virtual tables, etc) \c NameStrs,
/// the method generates a combined string \c Result that is ready to be
/// serialized. The \c Result string is comprised of three fields:
/// The first field is the length of the uncompressed strings, and the
>From be264c173e293ee06866492ef41edcde33d8ff79 Mon Sep 17 00:00:00 2001
From: Mingming Liu <mingmingl at google.com>
Date: Wed, 25 Oct 2023 22:22:29 -0700
Subject: [PATCH 4/7] run clang-format
---
llvm/include/llvm/ProfileData/InstrProf.h | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/llvm/include/llvm/ProfileData/InstrProf.h b/llvm/include/llvm/ProfileData/InstrProf.h
index 61f9bae1a83f775..39f33b8363332d2 100644
--- a/llvm/include/llvm/ProfileData/InstrProf.h
+++ b/llvm/include/llvm/ProfileData/InstrProf.h
@@ -220,12 +220,12 @@ StringRef getPGOFuncNameVarInitializer(GlobalVariable *NameVar);
StringRef getFuncNameWithoutPrefix(StringRef PGOFuncName,
StringRef FileName = "<unknown>");
-/// Given a vector of strings (names of global objects, like func PGO names, virtual tables, etc) \c NameStrs,
-/// the method generates a combined string \c Result that is ready to be
-/// serialized. The \c Result string is comprised of three fields:
-/// The first field is the length of the uncompressed strings, and the
-/// the second field is the length of the zlib-compressed string.
-/// Both fields are encoded in ULEB128. If \c doCompress is false, the
+/// Given a vector of strings (names of global objects, like func PGO names,
+/// virtual tables, etc) \c NameStrs, the method generates a combined string \c
+/// Result that is ready to be serialized. The \c Result string is comprised of
+/// three fields: The first field is the length of the uncompressed strings, and
+/// the the second field is the length of the zlib-compressed string. Both
+/// fields are encoded in ULEB128. If \c doCompress is false, the
/// third field is the uncompressed strings; otherwise it is the
/// compressed string. When the string compression is off, the
/// second field will have value zero.
>From 9a96d611d01c219c2b345139941935df770d83dc Mon Sep 17 00:00:00 2001
From: Mingming Liu <mingmingl at google.com>
Date: Thu, 26 Oct 2023 12:07:08 -0700
Subject: [PATCH 5/7] 1. In InstrProf.cpp, change two static functions
(function name or argument type) to use them for general global objects
(functions, vtable objects) 2. In InstrProf.h, add a function comment around
the element in NameVars.
---
llvm/include/llvm/ProfileData/InstrProf.h | 3 +++
llvm/lib/ProfileData/InstrProf.cpp | 17 +++++++++--------
2 files changed, 12 insertions(+), 8 deletions(-)
diff --git a/llvm/include/llvm/ProfileData/InstrProf.h b/llvm/include/llvm/ProfileData/InstrProf.h
index 39f33b8363332d2..b751ac8bd6e95dc 100644
--- a/llvm/include/llvm/ProfileData/InstrProf.h
+++ b/llvm/include/llvm/ProfileData/InstrProf.h
@@ -234,6 +234,9 @@ Error collectGlobalObjectNameStrings(ArrayRef<std::string> NameStrs,
/// Produce \c Result string with the same format described above. The input
/// is vector of PGO function name variables that are referenced.
+/// The global variable element in 'NameVars' is a string containing the pgo
+/// name of a function. See `createPGOFuncNameVar` that creates these global
+/// variables.
Error collectPGOFuncNameStrings(ArrayRef<GlobalVariable *> NameVars,
std::string &Result, bool doCompression = true);
diff --git a/llvm/lib/ProfileData/InstrProf.cpp b/llvm/lib/ProfileData/InstrProf.cpp
index db9b111d37c2fc3..b46e20938725cd6 100644
--- a/llvm/lib/ProfileData/InstrProf.cpp
+++ b/llvm/lib/ProfileData/InstrProf.cpp
@@ -265,8 +265,8 @@ static StringRef stripDirPrefix(StringRef PathNameStr, uint32_t NumPrefix) {
return PathNameStr.substr(LastPos);
}
-static StringRef getStrippedSourceFileName(const Function &F) {
- StringRef FileName(F.getParent()->getSourceFileName());
+static StringRef getStrippedSourceFileName(const GlobalObject &GO) {
+ StringRef FileName(GO.getParent()->getSourceFileName());
uint32_t StripLevel = StaticFuncFullModulePrefix ? 0 : (uint32_t)-1;
if (StripLevel < StaticFuncStripDirNamePrefix)
StripLevel = StaticFuncStripDirNamePrefix;
@@ -289,15 +289,16 @@ static StringRef getStrippedSourceFileName(const Function &F) {
// mangled, they cannot be passed to Mach-O linkers via -order_file. We still
// need to compute this name to lookup functions from profiles built by older
// compilers.
-static std::string getIRPGOFuncName(const Function &F,
- GlobalValue::LinkageTypes Linkage,
- StringRef FileName) {
+static std::string
+getIRPGONameForGlobalObject(const GlobalObject &GO,
+ GlobalValue::LinkageTypes Linkage,
+ StringRef FileName) {
SmallString<64> Name;
if (llvm::GlobalValue::isLocalLinkage(Linkage)) {
Name.append(FileName.empty() ? "<unknown>" : FileName);
Name.append(";");
}
- Mangler().getNameWithPrefix(Name, &F, /*CannotUsePrivateLabel=*/true);
+ Mangler().getNameWithPrefix(Name, &GO, /*CannotUsePrivateLabel=*/true);
return Name.str().str();
}
@@ -313,7 +314,7 @@ static std::optional<std::string> lookupPGOFuncName(const Function &F) {
std::string getIRPGOFuncName(const Function &F, bool InLTO) {
if (!InLTO) {
auto FileName = getStrippedSourceFileName(F);
- return getIRPGOFuncName(F, F.getLinkage(), FileName);
+ return getIRPGONameForGlobalObject(F, F.getLinkage(), FileName);
}
// In LTO mode (when InLTO is true), first check if there is a meta data.
@@ -323,7 +324,7 @@ std::string getIRPGOFuncName(const Function &F, bool InLTO) {
// If there is no meta data, the function must be a global before the value
// profile annotation pass. Its current linkage may be internal if it is
// internalized in LTO mode.
- return getIRPGOFuncName(F, GlobalValue::ExternalLinkage, "");
+ return getIRPGONameForGlobalObject(F, GlobalValue::ExternalLinkage, "");
}
// Return the PGOFuncName. This function has some special handling when called
>From a8c99658f01f1541626a9b3510f27e4fac3e0397 Mon Sep 17 00:00:00 2001
From: Mingming Liu <mingmingl at google.com>
Date: Thu, 26 Oct 2023 13:37:47 -0700
Subject: [PATCH 6/7] Add static function 'getIRPGOObjectName'; forwards
'getIRPGOFuncName' to it
---
llvm/include/llvm/ProfileData/InstrProf.h | 4 +-
llvm/lib/ProfileData/InstrProf.cpp | 53 +++++++++++++----------
2 files changed, 33 insertions(+), 24 deletions(-)
diff --git a/llvm/include/llvm/ProfileData/InstrProf.h b/llvm/include/llvm/ProfileData/InstrProf.h
index b751ac8bd6e95dc..0f75c578e9415c3 100644
--- a/llvm/include/llvm/ProfileData/InstrProf.h
+++ b/llvm/include/llvm/ProfileData/InstrProf.h
@@ -220,8 +220,8 @@ StringRef getPGOFuncNameVarInitializer(GlobalVariable *NameVar);
StringRef getFuncNameWithoutPrefix(StringRef PGOFuncName,
StringRef FileName = "<unknown>");
-/// Given a vector of strings (names of global objects, like func PGO names,
-/// virtual tables, etc) \c NameStrs, the method generates a combined string \c
+/// Given a vector of strings (names of global objects like functions or,
+/// virtual tables) \c NameStrs, the method generates a combined string \c
/// Result that is ready to be serialized. The \c Result string is comprised of
/// three fields: The first field is the length of the uncompressed strings, and
/// the the second field is the length of the zlib-compressed string. Both
diff --git a/llvm/lib/ProfileData/InstrProf.cpp b/llvm/lib/ProfileData/InstrProf.cpp
index b46e20938725cd6..bdf39446ebecff6 100644
--- a/llvm/lib/ProfileData/InstrProf.cpp
+++ b/llvm/lib/ProfileData/InstrProf.cpp
@@ -302,44 +302,53 @@ getIRPGONameForGlobalObject(const GlobalObject &GO,
return Name.str().str();
}
-static std::optional<std::string> lookupPGOFuncName(const Function &F) {
- if (MDNode *MD = getPGOFuncNameMetadata(F)) {
+static std::optional<std::string> lookupPGONameFromMetadata(MDNode *MD) {
+ if (MD != nullptr) {
StringRef S = cast<MDString>(MD->getOperand(0))->getString();
return S.str();
}
return {};
}
-// See getPGOFuncName()
-std::string getIRPGOFuncName(const Function &F, bool InLTO) {
+// Returns the PGO object name. This function has some special handling
+// when called in LTO optimization. The following only applies when calling in
+// LTO passes (when \c InLTO is true): LTO's internalization privatizes many
+// global linkage symbols. This happens after value profile annotation, but
+// those internal linkage functions should not have a source prefix.
+// Additionally, for ThinLTO mode, exported internal functions are promoted
+// and renamed. We need to ensure that the original internal PGO name is
+// used when computing the GUID that is compared against the profiled GUIDs.
+// To differentiate compiler generated internal symbols from original ones,
+// PGOFuncName meta data are created and attached to the original internal
+// symbols in the value profile annotation step
+// (PGOUseFunc::annotateIndirectCallSites). If a symbol does not have the meta
+// data, its original linkage must be non-internal.
+static std::string getIRPGOObjectName(const GlobalObject &GO, bool InLTO,
+ MDNode *PGONameMetadata) {
if (!InLTO) {
- auto FileName = getStrippedSourceFileName(F);
- return getIRPGONameForGlobalObject(F, F.getLinkage(), FileName);
+ auto FileName = getStrippedSourceFileName(GO);
+ return getIRPGONameForGlobalObject(GO, GO.getLinkage(), FileName);
}
// In LTO mode (when InLTO is true), first check if there is a meta data.
- if (auto IRPGOFuncName = lookupPGOFuncName(F))
+ if (auto IRPGOFuncName = lookupPGONameFromMetadata(PGONameMetadata))
return *IRPGOFuncName;
// If there is no meta data, the function must be a global before the value
// profile annotation pass. Its current linkage may be internal if it is
// internalized in LTO mode.
- return getIRPGONameForGlobalObject(F, GlobalValue::ExternalLinkage, "");
+ return getIRPGONameForGlobalObject(GO, GlobalValue::ExternalLinkage, "");
}
-// Return the PGOFuncName. This function has some special handling when called
-// in LTO optimization. The following only applies when calling in LTO passes
-// (when \c InLTO is true): LTO's internalization privatizes many global linkage
-// symbols. This happens after value profile annotation, but those internal
-// linkage functions should not have a source prefix.
-// Additionally, for ThinLTO mode, exported internal functions are promoted
-// and renamed. We need to ensure that the original internal PGO name is
-// used when computing the GUID that is compared against the profiled GUIDs.
-// To differentiate compiler generated internal symbols from original ones,
-// PGOFuncName meta data are created and attached to the original internal
-// symbols in the value profile annotation step
-// (PGOUseFunc::annotateIndirectCallSites). If a symbol does not have the meta
-// data, its original linkage must be non-internal.
+// Returns the IRPGO function name and does special handling when called
+// in LTO optimization. See the comments of `getIRPGOObjectName` for details.
+std::string getIRPGOFuncName(const Function &F, bool InLTO) {
+ return getIRPGOObjectName(F, InLTO, getPGOFuncNameMetadata(F));
+}
+
+// This is similar to `getIRPGOFuncName` except that this function calls
+// 'getIRPGOFuncName' to get a name and `getIRPGOFuncName` calls 'getIRPGOName'.
+// See the difference between two callees in the comments of `getIRPGOFuncName`.
std::string getPGOFuncName(const Function &F, bool InLTO, uint64_t Version) {
if (!InLTO) {
auto FileName = getStrippedSourceFileName(F);
@@ -347,7 +356,7 @@ std::string getPGOFuncName(const Function &F, bool InLTO, uint64_t Version) {
}
// In LTO mode (when InLTO is true), first check if there is a meta data.
- if (auto PGOFuncName = lookupPGOFuncName(F))
+ if (auto PGOFuncName = lookupPGONameFromMetadata(getPGOFuncNameMetadata(F)))
return *PGOFuncName;
// If there is no meta data, the function must be a global before the value
>From b77690139a1bdd605489b7837c01e2cc485722ae Mon Sep 17 00:00:00 2001
From: Mingming Liu <mingmingl at google.com>
Date: Thu, 26 Oct 2023 14:04:26 -0700
Subject: [PATCH 7/7] update comment per review comment
---
llvm/lib/ProfileData/InstrProf.cpp | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/llvm/lib/ProfileData/InstrProf.cpp b/llvm/lib/ProfileData/InstrProf.cpp
index bdf39446ebecff6..0e71afbcee7183e 100644
--- a/llvm/lib/ProfileData/InstrProf.cpp
+++ b/llvm/lib/ProfileData/InstrProf.cpp
@@ -347,8 +347,9 @@ std::string getIRPGOFuncName(const Function &F, bool InLTO) {
}
// This is similar to `getIRPGOFuncName` except that this function calls
-// 'getIRPGOFuncName' to get a name and `getIRPGOFuncName` calls 'getIRPGOName'.
-// See the difference between two callees in the comments of `getIRPGOFuncName`.
+// 'getPGOFuncName' to get a name and `getIRPGOFuncName` calls
+// 'getIRPGONameForGlobalObject'. See the difference between two callees in the
+// comments of `getIRPGONameForGlobalObject`.
std::string getPGOFuncName(const Function &F, bool InLTO, uint64_t Version) {
if (!InLTO) {
auto FileName = getStrippedSourceFileName(F);
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