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/ARM/ARMInstrInfo.cpp b/lib/Target/ARM/ARMInstrInfo.cpp
index b404ec0..0ec3b9f 100644
--- a/lib/Target/ARM/ARMInstrInfo.cpp
+++ b/lib/Target/ARM/ARMInstrInfo.cpp
@@ -17,6 +17,7 @@
 #include "ARMAddressingModes.h"
 #include "ARMGenInstrInfo.inc"
 #include "ARMMachineFunctionInfo.h"
+#include "llvm/ADT/STLExtras.h"
 #include "llvm/CodeGen/LiveVariables.h"
 #include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "llvm/CodeGen/MachineJumpTableInfo.h"
@@ -28,7 +29,7 @@
                                   cl::desc("Enable ARM 2-addr to 3-addr conv"));
 
 ARMInstrInfo::ARMInstrInfo(const ARMSubtarget &STI)
-  : TargetInstrInfo(ARMInsts, sizeof(ARMInsts)/sizeof(ARMInsts[0])),
+  : TargetInstrInfo(ARMInsts, array_lengthof(ARMInsts)),
     RI(*this, STI) {
 }