Simplify code. No functional change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187870 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 57e748b..592e5b3 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -5288,10 +5288,7 @@
                              LD->getPointerInfo().getWithOffset(StartOffset),
                              false, false, false, 0);
 
-    SmallVector<int, 8> Mask;
-    for (unsigned i = 0; i != NumElems; ++i)
-      Mask.push_back(EltNo);
-
+    SmallVector<int, 8> Mask(NumElems, EltNo);
     return DAG.getVectorShuffle(NVT, dl, V1, DAG.getUNDEF(NVT), &Mask[0]);
   }