Revert "[CSSPGO] Pseudo probe encoding and emission."

This reverts commit b035513c06d1cba2bae8f3e88798334e877523e1.

Reason: Broke the ASan buildbots:
  http://lab.llvm.org:8011/#/builders/5/builds/2269

1 files changed, 0 insertions, 24 deletions

diff --git a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
index 6cbf21d..2e32eab 100644
--- a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
+++ b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
@@ -40,7 +40,6 @@
 #include "llvm/IR/Mangler.h"
 #include "llvm/IR/Metadata.h"
 #include "llvm/IR/Module.h"
-#include "llvm/IR/PseudoProbe.h"
 #include "llvm/IR/Type.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCContext.h"
@@ -317,29 +316,6 @@ void TargetLoweringObjectFileELF::emitModuleMetadata(MCStreamer &Streamer,
     }
   }
 
-  if (NamedMDNode *FuncInfo = M.getNamedMetadata(PseudoProbeDescMetadataName)) {
-    // Emit a descriptor for every function including functions that have an
-    // available external linkage. We may not want this for imported functions
-    // that has code in another thinLTO module but we don't have a good way to
-    // tell them apart from inline functions defined in header files. Therefore
-    // we put each descriptor in a separate comdat section and rely on the
-    // linker to deduplicate.
-    for (const auto *Operand : FuncInfo->operands()) {
-      const auto *MD = cast<MDNode>(Operand);
-      auto *GUID = mdconst::dyn_extract<ConstantInt>(MD->getOperand(0));
-      auto *Hash = mdconst::dyn_extract<ConstantInt>(MD->getOperand(1));
-      auto *Name = cast<MDString>(MD->getOperand(2));
-      auto *S = C.getObjectFileInfo()->getPseudoProbeDescSection(
-          TM->getFunctionSections() ? Name->getString() : StringRef());
-
-      Streamer.SwitchSection(S);
-      Streamer.emitInt64(GUID->getZExtValue());
-      Streamer.emitInt64(Hash->getZExtValue());
-      Streamer.emitULEB128IntValue(Name->getString().size());
-      Streamer.emitBytes(Name->getString());
-    }
-  }
-
   unsigned Version = 0;
   unsigned Flags = 0;
   StringRef Section;