Generate code for llvm.uadd.with.overflow intrinsic. No conversion support yet.

llvm-svn: 59786

1 files changed, 12 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
index 4bc0128bd57..53bc88d0c3f 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
@@ -4109,7 +4109,18 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
     return 0;
   }
   case Intrinsic::uadd_with_overflow: {
-    // TODO: Convert to "ISD::UADDO" instruction.
+    // Convert to "ISD::UADDO" instruction.
+    SDValue Op1 = getValue(I.getOperand(1));
+    SDValue Op2 = getValue(I.getOperand(2));
+    MVT Ty = Op1.getValueType();
+
+    MVT ValueVTs[] = { Ty, MVT::i1 };
+    SDValue Ops[] = { Op1, Op2 };
+
+    SDValue Result = DAG.getNode(ISD::UADDO, DAG.getVTList(&ValueVTs[0], 2),
+                                 &Ops[0], 2);
+
+    setValue(&I, Result);
     return 0;
   }