Turn LoopLoadElimination on again

The two issues that were discovered got fixed (r263058, r263173).

The pass can be disabled with -mllvm -enable-loop-load-elim=0

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263472 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/IPO/PassManagerBuilder.cpp

@@ -105,8 +105,8 @@ static cl::opt<bool> EnableNonLTOGlobalsModRef(
         "Enable the GlobalsModRef AliasAnalysis outside of the LTO pipeline."));
 
 static cl::opt<bool> EnableLoopLoadElim(
-    "enable-loop-load-elim", cl::init(false), cl::Hidden,
-    cl::desc("Enable the new, experimental LoopLoadElimination Pass"));
+    "enable-loop-load-elim", cl::init(true), cl::Hidden,
+    cl::desc("Enable the LoopLoadElimination Pass"));
 
 static cl::opt<std::string> RunPGOInstrGen(
     "profile-generate", cl::init(""), cl::Hidden,