Reland [CodeGen] emit CG profile for COFF object file

This reverts commit 90242caca2074dab5a9b76e5bc36d9fafd2179a7.

Error fixed at f5435399e823746bbe1737b95c853d77a42e1ac3

Differential Revision: https://reviews.llvm.org/D87811

1 files changed, 14 insertions, 52 deletions

diff --git a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
index 83014da..0c43ec8 100644
--- a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
+++ b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
@@ -107,7 +107,6 @@ static void GetObjCImageInfo(Module &M, unsigned &Version, unsigned &Flags,
 void TargetLoweringObjectFileELF::Initialize(MCContext &Ctx,
                                              const TargetMachine &TgtM) {
   TargetLoweringObjectFile::Initialize(Ctx, TgtM);
-  TM = &TgtM;
 
   CodeModel::Model CM = TgtM.getCodeModel();
   InitializeELF(TgtM.Options.UseInitArray);
@@ -324,46 +323,7 @@ void TargetLoweringObjectFileELF::emitModuleMetadata(MCStreamer &Streamer,
     Streamer.AddBlankLine();
   }
 
-  SmallVector<Module::ModuleFlagEntry, 8> ModuleFlags;
-  M.getModuleFlagsMetadata(ModuleFlags);
-
-  MDNode *CFGProfile = nullptr;
-
-  for (const auto &MFE : ModuleFlags) {
-    StringRef Key = MFE.Key->getString();
-    if (Key == "CG Profile") {
-      CFGProfile = cast<MDNode>(MFE.Val);
-      break;
-    }
-  }
-
-  if (!CFGProfile)
-    return;
-
-  auto GetSym = [this](const MDOperand &MDO) -> MCSymbol * {
-    if (!MDO)
-      return nullptr;
-    auto V = cast<ValueAsMetadata>(MDO);
-    const Function *F = cast<Function>(V->getValue());
-    return TM->getSymbol(F);
-  };
-
-  for (const auto &Edge : CFGProfile->operands()) {
-    MDNode *E = cast<MDNode>(Edge);
-    const MCSymbol *From = GetSym(E->getOperand(0));
-    const MCSymbol *To = GetSym(E->getOperand(1));
-    // Skip null functions. This can happen if functions are dead stripped after
-    // the CGProfile pass has been run.
-    if (!From || !To)
-      continue;
-    uint64_t Count = cast<ConstantAsMetadata>(E->getOperand(2))
-                         ->getValue()
-                         ->getUniqueInteger()
-                         .getZExtValue();
-    Streamer.emitCGProfileEntry(
-        MCSymbolRefExpr::create(From, MCSymbolRefExpr::VK_None, C),
-        MCSymbolRefExpr::create(To, MCSymbolRefExpr::VK_None, C), Count);
-  }
+  emitCGProfile(Streamer, M);
 }
 
 MCSymbol *TargetLoweringObjectFileELF::getCFIPersonalitySymbol(
@@ -1598,18 +1558,20 @@ void TargetLoweringObjectFileCOFF::emitModuleMetadata(MCStreamer &Streamer,
   StringRef Section;
 
   GetObjCImageInfo(M, Version, Flags, Section);
-  if (Section.empty())
-    return;
+  if (!Section.empty()) {
+    auto &C = getContext();
+    auto *S = C.getCOFFSection(Section,
+                               COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+                                   COFF::IMAGE_SCN_MEM_READ,
+                               SectionKind::getReadOnly());
+    Streamer.SwitchSection(S);
+    Streamer.emitLabel(C.getOrCreateSymbol(StringRef("OBJC_IMAGE_INFO")));
+    Streamer.emitInt32(Version);
+    Streamer.emitInt32(Flags);
+    Streamer.AddBlankLine();
+  }
 
-  auto &C = getContext();
-  auto *S = C.getCOFFSection(
-      Section, COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,
-      SectionKind::getReadOnly());
-  Streamer.SwitchSection(S);
-  Streamer.emitLabel(C.getOrCreateSymbol(StringRef("OBJC_IMAGE_INFO")));
-  Streamer.emitInt32(Version);
-  Streamer.emitInt32(Flags);
-  Streamer.AddBlankLine();
+  emitCGProfile(Streamer, M);
 }
 
 void TargetLoweringObjectFileCOFF::emitLinkerDirectives(