Add sub/mul overflow intrinsics. This currently doesn't have a
target-independent way of determining overflow on multiplication. It's very
tricky. Patch by Zoltan Varga!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60800 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h
index e614c30..db70f16 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h
@@ -530,6 +530,7 @@
   }
   
   const char *implVisitBinaryAtomic(CallInst& I, ISD::NodeType Op);
+  const char *implVisitAluOverflow(CallInst &I, ISD::NodeType Op);
 };
 
 /// AddCatchInfo - Extract the personality and type infos from an eh.selector