[InstCombine] name change: foldShuffledBinop -> foldVectorBinop; NFC

This function will deal with more than shuffles with D50992, and I 
have another potential per-element fold that could live here.

llvm-svn: 343692
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp b/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
index a2567d1..f5db853 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
@@ -1041,7 +1041,7 @@
   if (SimplifyAssociativeOrCommutative(I))
     return &I;
 
-  if (Instruction *X = foldShuffledBinop(I))
+  if (Instruction *X = foldVectorBinop(I))
     return X;
 
   // (A*B)+(A*C) -> A*(B+C) etc
@@ -1276,7 +1276,7 @@
   if (SimplifyAssociativeOrCommutative(I))
     return &I;
 
-  if (Instruction *X = foldShuffledBinop(I))
+  if (Instruction *X = foldVectorBinop(I))
     return X;
 
   if (Instruction *FoldedFAdd = foldBinOpIntoSelectOrPhi(I))
@@ -1455,7 +1455,7 @@
                                  SQ.getWithInstruction(&I)))
     return replaceInstUsesWith(I, V);
 
-  if (Instruction *X = foldShuffledBinop(I))
+  if (Instruction *X = foldVectorBinop(I))
     return X;
 
   // (A*B)-(A*C) -> A*(B-C) etc
@@ -1752,7 +1752,7 @@
                                   SQ.getWithInstruction(&I)))
     return replaceInstUsesWith(I, V);
 
-  if (Instruction *X = foldShuffledBinop(I))
+  if (Instruction *X = foldVectorBinop(I))
     return X;
 
   // Subtraction from -0.0 is the canonical form of fneg.