Revert "Add prefix based function layout when profile is available."

This reverts commit r261582, since this bot has been broken for four
hours:
http://lab.llvm.org:8080/green/job/clang-stage1-cmake-RA-incremental_check/19399/

llvm-svn: 261604

llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp

@@ -34,7 +34,6 @@
 #include "llvm/MC/MCSymbolELF.h"
 #include "llvm/MC/MCValue.h"
 #include "llvm/ProfileData/InstrProf.h"
-#include "llvm/ProfileData/ProfileCommon.h"
 #include "llvm/Support/COFF.h"
 #include "llvm/Support/Dwarf.h"
 #include "llvm/Support/ELF.h"
@@ -245,11 +244,6 @@ static StringRef getSectionPrefixForGlobal(SectionKind Kind) {
   return ".data.rel.ro";
 }
 
-static cl::opt<bool> GroupFunctionsByHotness(
-    "group-functions-by-hotness",
-    llvm::cl::desc("Partition hot/cold functions by sections prefix"),
-    cl::init(false));
-
 static MCSectionELF *
 selectELFSectionForGlobal(MCContext &Ctx, const GlobalValue *GV,
                           SectionKind Kind, Mangler &Mang,
@@ -302,16 +296,6 @@ selectELFSectionForGlobal(MCContext &Ctx, const GlobalValue *GV,
     Name = getSectionPrefixForGlobal(Kind);
   }
 
-  if (GroupFunctionsByHotness) {
-    if (const Function *F = dyn_cast<Function>(GV)) {
-      if (ProfileSummary::isFunctionHot(F)) {
-        Name += getHotSectionPrefix();
-      } else if (ProfileSummary::isFunctionUnlikely(F)) {
-        Name += getUnlikelySectionPrefix();
-      }
-    }
-  }
-
   if (EmitUniqueSection && UniqueSectionNames) {
     Name.push_back('.');
     TM.getNameWithPrefix(Name, GV, Mang, true);