Added LLVM_FALLTHROUGH to address warning: this statement may fall through. NFC.

llvm-svn: 304635
diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
index 5f167f8..9355dbe 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
@@ -225,6 +225,7 @@
           }
           return TranslateLegalizeResults(Op, Lowered);
         }
+        LLVM_FALLTHROUGH;
       case TargetLowering::Expand:
         Changed = true;
         return LegalizeOp(ExpandLoad(Op));
diff --git a/llvm/lib/CodeGen/TargetLoweringBase.cpp b/llvm/lib/CodeGen/TargetLoweringBase.cpp
index 900c031..c43a5e18 100644
--- a/llvm/lib/CodeGen/TargetLoweringBase.cpp
+++ b/llvm/lib/CodeGen/TargetLoweringBase.cpp
@@ -1456,6 +1456,7 @@
       }
       if (IsLegalWiderType)
         break;
+      LLVM_FALLTHROUGH;
     }
     case TypeWidenVector: {
       // Try to widen the vector.
@@ -1473,6 +1474,7 @@
       }
       if (IsLegalWiderType)
         break;
+      LLVM_FALLTHROUGH;
     }
     case TypeSplitVector:
     case TypeScalarizeVector: {