Add lengthof and endof templates that hide a lot of sizeof computations.
Patch by Sterling Stein!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41758 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Mips/MipsInstrInfo.cpp b/lib/Target/Mips/MipsInstrInfo.cpp
index fb73a79..4551d55 100644
--- a/lib/Target/Mips/MipsInstrInfo.cpp
+++ b/lib/Target/Mips/MipsInstrInfo.cpp
@@ -13,6 +13,7 @@
 
 #include "Mips.h"
 #include "MipsInstrInfo.h"
+#include "llvm/ADT/STLExtras.h"
 #include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "MipsGenInstrInfo.inc"
 
@@ -20,7 +21,7 @@
 
 // TODO: Add the subtarget support on this constructor
 MipsInstrInfo::MipsInstrInfo(MipsTargetMachine &tm)
-  : TargetInstrInfo(MipsInsts, sizeof(MipsInsts)/sizeof(MipsInsts[0])),
+  : TargetInstrInfo(MipsInsts, array_lengthof(MipsInsts)),
     TM(tm), RI(*this) {}
 
 static bool isZeroImm(const MachineOperand &op) {