Revert "Emit lifetime.start / lifetime.end markers for unnamed temporary objects."

This reverts commit dbf785a6432f78a8ec229665876647c4cc610d3d, while I qm
investigating a buildbot failure.

llvm-svn: 213380

1 files changed, 0 insertions, 15 deletions

diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index 1cb43ef6595..63731b7b7d0 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -353,17 +353,6 @@ LValue CodeGenFunction::EmitMaterializeTemporaryExpr(
 
   // Create and initialize the reference temporary.
   llvm::Value *Object = createReferenceTemporary(*this, M, E);
-
-  uint64_t size =
-      CGM.getDataLayout().getTypeStoreSize(ConvertTypeForMem(E->getType()));
-  llvm::Value *sizeV = nullptr;
-  llvm::AllocaInst *Alloca = dyn_cast<llvm::AllocaInst>(Object);
-  bool useLifetimeMarkers = Alloca && shouldUseLifetimeMarkers(size);
-  if (useLifetimeMarkers) {
-    sizeV = llvm::ConstantInt::get(Int64Ty, size);
-    EmitLifetimeStart(sizeV, Object);
-  }
-
   if (auto *Var = dyn_cast<llvm::GlobalVariable>(Object)) {
     // If the temporary is a global and has a constant initializer, we may
     // have already initialized it.
@@ -374,10 +363,6 @@ LValue CodeGenFunction::EmitMaterializeTemporaryExpr(
   } else {
     EmitAnyExprToMem(E, Object, Qualifiers(), /*IsInit*/true);
   }
-
-  if (useLifetimeMarkers)
-    EHStack.pushCleanup<CallLifetimeEnd>(NormalAndEHCleanup, Object, sizeV);
-
   pushTemporaryCleanup(*this, M, E, Object);
 
   // Perform derived-to-base casts and/or field accesses, to get from the