[LV] Remove type restriction for vector phi creation

We previously only created a vector phi node for an induction variable if its
type matched the type of the canonical induction variable.

Differential Revision: https://reviews.llvm.org/D29776

llvm-svn: 294755

llvm/lib/Transforms/Vectorize/LoopVectorize.cpp

@@ -2421,8 +2421,7 @@ void InnerLoopVectorizer::widenIntInduction(PHINode *IV, TruncInst *Trunc) {
   // Try to create a new independent vector induction variable. If we can't
   // create the phi node, we will splat the scalar induction variable in each
   // loop iteration.
-  if (VF > 1 && IV->getType() == Induction->getType() && Step &&
-      !shouldScalarizeInstruction(EntryVal)) {
+  if (VF > 1 && Step && !shouldScalarizeInstruction(EntryVal)) {
     createVectorIntInductionPHI(ID, EntryVal);
     VectorizedIV = true;
   }