Revert LTO pipeline changes.

Author: bader

llvm/lib/Transforms/IPO/PassManagerBuilder.cpp

@@ -1045,16 +1045,13 @@ void PassManagerBuilder::addLTOOptimizationPasses(legacy::PassManagerBase &PM) {
   if (EnableLoopInterchange)
     PM.add(createLoopInterchangePass());
 
-  if (!SYCLOptimizationMode) {
-    // Unroll small loops
-    PM.add(createSimpleLoopUnrollPass(OptLevel, DisableUnrollLoops,
-                                      ForgetAllSCEVInLoopUnroll));
-    PM.add(createLoopVectorizePass(true, !LoopVectorize));
-    // The vectorizer may have significantly shortened a loop body; unroll
-    // again.
-    PM.add(createLoopUnrollPass(OptLevel, DisableUnrollLoops,
-                                ForgetAllSCEVInLoopUnroll));
-  }
+  // Unroll small loops
+  PM.add(createSimpleLoopUnrollPass(OptLevel, DisableUnrollLoops,
+                                    ForgetAllSCEVInLoopUnroll));
+  PM.add(createLoopVectorizePass(true, !LoopVectorize));
+  // The vectorizer may have significantly shortened a loop body; unroll again.
+  PM.add(createLoopUnrollPass(OptLevel, DisableUnrollLoops,
+                              ForgetAllSCEVInLoopUnroll));
 
   PM.add(createWarnMissedTransformationsPass());