Remove LoopVectorizationCostModel::AT

[• ehsan]

Summary

This triggers an unused private field warning.

[dblaikie]

Is the warning emitted in a +Asserts build of LLVM? (usually such warnings don't persist long in the codebase, because so many of us build with -Werror +Asserts, so that leaves the clang warnings for -Asserts builds, but you have to be careful that you don't break the +Asserts build when you fix these (eg: the variable may be unused in -Asserts, but used in +Asserts, so removing it will fix the -Asserts warning, but break the +Asserts build))

[echristo]

I've committed this in r219749.

[• ehsan]

Thanks :)

lib/Transforms/Vectorize/LoopVectorize.cpp

 public:
   LoopVectorizationCostModel(Loop *L, ScalarEvolution *SE, LoopInfo *LI,
                              LoopVectorizationLegality *Legal,
                              const TargetTransformInfo &TTI,
                              const DataLayout *DL, const TargetLibraryInfo *TLI,
                              AssumptionTracker *AT, const Function *F,
                              const LoopVectorizeHints *Hints)
       : TheLoop(L), SE(SE), LI(LI), Legal(Legal), TTI(TTI), DL(DL), TLI(TLI),
-        AT(AT), TheFunction(F), Hints(Hints) {
+        TheFunction(F), Hints(Hints) {
     CodeMetrics::collectEphemeralValues(L, AT, EphValues);
   }
 
   /// Information about vectorization costs
   struct VectorizationFactor {
     unsigned Width; // Vector width with best cost
     unsigned Cost; // Cost of the loop with that width
   };
private:
   /// Vectorization legality.
   LoopVectorizationLegality *Legal;
   /// Vector target information.
   const TargetTransformInfo &TTI;
   /// Target data layout information.
   const DataLayout *DL;
   /// Target Library Info.
   const TargetLibraryInfo *TLI;
-  /// Tracker for @llvm.assume.
-  AssumptionTracker *AT;
   const Function *TheFunction;
   // Loop Vectorize Hint.
   const LoopVectorizeHints *Hints;
 };
 
 /// Utility class for getting and setting loop vectorizer hints in the form
 /// of loop metadata.
 /// This class keeps a number of loop annotations locally (as member variables)