Remove much cruft from the MemAccessInst instruction


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1298 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/InstrSelection/InstrForest.cpp b/lib/CodeGen/InstrSelection/InstrForest.cpp
index d460bb7..f928683 100644
--- a/lib/CodeGen/InstrSelection/InstrForest.cpp
+++ b/lib/CodeGen/InstrSelection/InstrForest.cpp
@@ -76,7 +76,7 @@
     }
   else if ((opLabel == Instruction::Load ||
 	    opLabel == Instruction::GetElementPtr) &&
-	   ((MemAccessInst*)I)->getFirstOffsetIdx() > 0)
+	   cast<MemAccessInst>(I)->hasIndices())
     {
       opLabel = opLabel + 100;		 // load/getElem with index vector
     }