Remove isProfitableToDuplicateIndirectBranch target hook. It is profitable

for all the processors where I have tried it, and even when it might not help
performance, the cost is quite low.  The opportunities for duplicating
indirect branches are limited by other factors so code size does not change
much due to tail duplicating indirect branches aggressively.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90144 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/ARM/ARMSubtarget.h

@@ -50,9 +50,6 @@ protected:
   /// determine if NEON should actually be used.
   bool UseNEONForSinglePrecisionFP;
 
-  /// HasBranchTargetBuffer - True if processor can predict indirect branches.
-  bool HasBranchTargetBuffer;
-
   /// IsThumb - True if we are in thumb mode, false if in ARM mode.
   bool IsThumb;
 
@@ -130,8 +127,6 @@ protected:
   bool isThumb2() const { return IsThumb && (ThumbMode == Thumb2); }
   bool hasThumb2() const { return ThumbMode >= Thumb2; }
 
-  bool hasBranchTargetBuffer() const { return HasBranchTargetBuffer; }
-
   bool isR9Reserved() const { return IsR9Reserved; }
 
   bool useMovt() const { return UseMovt && hasV6T2Ops(); }