[LV] Remove redundant InnerLoopUnroller class (NFCI).

All members of InnerLoopUnroller were removed previously and it now just
forwards to InnerLoopVectorizer's constructor. Remove it.

Author: fhahn

llvm/lib/Transforms/Vectorize/LoopVectorize.cpp

@@ -683,22 +683,6 @@ class InnerLoopVectorizer {
       ReductionResumeValues;
 };
 
-class InnerLoopUnroller : public InnerLoopVectorizer {
-public:
-  InnerLoopUnroller(Loop *OrigLoop, PredicatedScalarEvolution &PSE,
-                    LoopInfo *LI, DominatorTree *DT,
-                    const TargetLibraryInfo *TLI,
-                    const TargetTransformInfo *TTI, AssumptionCache *AC,
-                    OptimizationRemarkEmitter *ORE, unsigned UnrollFactor,
-                    LoopVectorizationLegality *LVL,
-                    LoopVectorizationCostModel *CM, BlockFrequencyInfo *BFI,
-                    ProfileSummaryInfo *PSI, GeneratedRTChecks &Check)
-      : InnerLoopVectorizer(OrigLoop, PSE, LI, DT, TLI, TTI, AC, ORE,
-                            ElementCount::getFixed(1),
-                            ElementCount::getFixed(1), UnrollFactor, LVL, CM,
-                            BFI, PSI, Check) {}
-};
-
 /// Encapsulate information regarding vectorization of a loop and its epilogue.
 /// This information is meant to be updated and used across two stages of
 /// epilogue vectorization.
@@ -10107,8 +10091,9 @@ bool LoopVectorizePass::processLoop(Loop *L) {
       assert(IC > 1 && "interleave count should not be 1 or 0");
       // If we decided that it is not legal to vectorize the loop, then
       // interleave it.
-      InnerLoopUnroller Unroller(L, PSE, LI, DT, TLI, TTI, AC, ORE, IC, &LVL,
-                                 &CM, BFI, PSI, Checks);
+      InnerLoopVectorizer Unroller(
+          L, PSE, LI, DT, TLI, TTI, AC, ORE, ElementCount::getFixed(1),
+          ElementCount::getFixed(1), IC, &LVL, &CM, BFI, PSI, Checks);
 
       VPlan &BestPlan = LVP.getPlanFor(VF.Width);
       LVP.executePlan(VF.Width, IC, BestPlan, Unroller, DT, false);