Hook in GlobalMerge pass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109359 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 35ca389..56d2440 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -703,6 +703,12 @@
   return getTargetMachine().getSubtarget<ARMSubtarget>().isThumb() ? 1 : 2;
 }
 
+/// getMaximalGlobalOffset - Returns the maximal possible offset which can
+/// be used for loads / stores from the global.
+unsigned ARMTargetLowering::getMaximalGlobalOffset() const {
+  return (Subtarget->isThumb1Only() ? 127 : 4095);
+}
+
 Sched::Preference ARMTargetLowering::getSchedulingPreference(SDNode *N) const {
   unsigned NumVals = N->getNumValues();
   if (!NumVals)