[LV] Remove the redundant using LoopVectorizationPlanner:VPlanPtr

VPlan.h already contains the declaration of VPlanPtr type alias:

using VPlanPtr = std::unique_ptr<VPlan>;

The LoopVectorizationPlanner class also contains the same declaration
of VPlanPtr and therefore LoopVectorize requires a long wording when
its methods return VPlanPtr:

    LoopVectorizationPlanner::VPlanPtr
    LoopVectorizationPlanner::buildVPlanWithVPRecipes(...)

but LoopVectorize.cpp includes VPlan.h (via LoopVectorizationPlanner.h)
and can use VPlanPtr from that header.

Patch by Pavel Samolysov.

Reviewers: hsaito, rengolin, fhahn

Reviewed By: fhahn

Differential Revision: https://reviews.llvm.org/D62576

llvm-svn: 362126

Author: fhahn

llvm/lib/Transforms/Vectorize/LoopVectorizationPlanner.h

@@ -198,11 +198,9 @@ class LoopVectorizationPlanner {
   /// The legality analysis.
   LoopVectorizationLegality *Legal;
 
-  /// The profitablity analysis.
+  /// The profitability analysis.
   LoopVectorizationCostModel &CM;
 
-  using VPlanPtr = std::unique_ptr<VPlan>;
-
   SmallVector<VPlanPtr, 4> VPlans;
 
   /// This class is used to enable the VPlan to invoke a method of ILV. This is

llvm/lib/Transforms/Vectorize/LoopVectorize.cpp

@@ -56,6 +56,7 @@
 #include "llvm/Transforms/Vectorize/LoopVectorize.h"
 #include "LoopVectorizationPlanner.h"
 #include "VPRecipeBuilder.h"
+#include "VPlan.h"
 #include "VPlanHCFGBuilder.h"
 #include "VPlanHCFGTransforms.h"
 #include "VPlanPredicator.h"
@@ -6829,8 +6830,7 @@ void LoopVectorizationPlanner::buildVPlansWithVPRecipes(unsigned MinVF,
   }
 }
 
-LoopVectorizationPlanner::VPlanPtr
-LoopVectorizationPlanner::buildVPlanWithVPRecipes(
+VPlanPtr LoopVectorizationPlanner::buildVPlanWithVPRecipes(
     VFRange &Range, SmallPtrSetImpl<Value *> &NeedDef,
     SmallPtrSetImpl<Instruction *> &DeadInstructions) {
   // Hold a mapping from predicated instructions to their recipes, in order to
@@ -6954,8 +6954,7 @@ LoopVectorizationPlanner::buildVPlanWithVPRecipes(
   return Plan;
 }
 
-LoopVectorizationPlanner::VPlanPtr
-LoopVectorizationPlanner::buildVPlan(VFRange &Range) {
+VPlanPtr LoopVectorizationPlanner::buildVPlan(VFRange &Range) {
   // Outer loop handling: They may require CFG and instruction level
   // transformations before even evaluating whether vectorization is profitable.
   // Since we cannot modify the incoming IR, we need to build VPlan upfront in