Rename getMaximumUnrollFactor -> getMaxInterleaveFactor; also rename option names controlling this variable.

"Unroll" is not the appropriate name for this variable. Clang already uses 
the term "interleave" in pragmas and metadata for this.

Differential Revision: http://reviews.llvm.org/D5066

llvm-svn: 217528
diff --git a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
index 7ef1fdb..d2438d3 100644
--- a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
+++ b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
@@ -104,7 +104,7 @@
     return 64;
   }
 
-  unsigned getMaximumUnrollFactor() const override;
+  unsigned getMaxInterleaveFactor() const override;
 
   unsigned getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src) const
       override;
@@ -516,7 +516,7 @@
   return Cost;
 }
 
-unsigned AArch64TTI::getMaximumUnrollFactor() const {
+unsigned AArch64TTI::getMaxInterleaveFactor() const {
   if (ST->isCortexA57() || ST->isCyclone())
     return 4;
   return 2;