[PGO] Revert r260146 as it breaks Darwin platforms.

r260146 | xur | 2016-02-08 13:07:46 -0800 (Mon, 08 Feb 2016) | 13 lines
[PGO] Differentiate Clang instrumentation and IR level instrumentation profiles

llvm-svn: 260170

1 files changed, 0 insertions, 22 deletions

diff --git a/llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp b/llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp
index 99c9e3eab74..f9e421df354 100644
--- a/llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp
+++ b/llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp
@@ -713,22 +713,7 @@ void PGOUseFunc::setBranchWeights() {
 }
 } // end anonymous namespace
 
-// Create a COMDAT variable IR_LEVEL_PROF_VARNAME to make the runtime
-// aware this is an ir_level profile so it can set the version flag.
-static void createIRLevelProfileFlagVariable(Module &M) {
-  Type *IntTy64 = Type::getInt64Ty(M.getContext());
-  uint64_t ProfileVersion = (INSTR_PROF_RAW_VERSION | VARIANT_MASK_IR_PROF);
-  auto IRLevelVersionVariable =
-      new GlobalVariable(M, IntTy64, true, GlobalVariable::ExternalLinkage,
-                         Constant::getIntegerValue(IntTy64, APInt(64, ProfileVersion)),
-                         INSTR_PROF_QUOTE(IR_LEVEL_PROF_VERSION_VAR));
-  IRLevelVersionVariable->setVisibility(GlobalValue::DefaultVisibility);
-  IRLevelVersionVariable->setComdat(
-      M.getOrInsertComdat(StringRef(INSTR_PROF_QUOTE(IR_LEVEL_PROF_VERSION_VAR))));
-}
-
 bool PGOInstrumentationGen::runOnModule(Module &M) {
-  createIRLevelProfileFlagVariable(M);
   for (auto &F : M) {
     if (F.isDeclaration())
       continue;
@@ -766,13 +751,6 @@ bool PGOInstrumentationUse::runOnModule(Module &M) {
                                           "Cannot get PGOReader"));
     return false;
   }
-  // TODO: might need to change the warning once the clang option is finalized.
-  if (!PGOReader->isIRLevelProfile()) {
-    Ctx.diagnose(DiagnosticInfoPGOProfile(
-        ProfileFileName.data(), "Not an IR level instrumentation profile"));
-    return false;
-  }
-
 
   for (auto &F : M) {
     if (F.isDeclaration())