[llvm-commits] CVS: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

[Evan Cheng]

Changes in directory llvm/lib/CodeGen/SelectionDAG:

DAGCombiner.cpp updated: 1.171 -> 1.172
---
Log message:

visitVBinOp: Can't fold divide by zero!

---
Diffs of the changes:  (+8 -0)

 DAGCombiner.cpp |    8 ++++++++
 1 files changed, 8 insertions(+)


Index: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.171 llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.172
--- llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.171	Fri May 26 19:43:02 2006
+++ llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp	Wed May 31 01:08:35 2006
@@ -2778,6 +2778,14 @@
            RHSOp.getOpcode() != ISD::Constant &&
            RHSOp.getOpcode() != ISD::ConstantFP))
         break;
+      // Can't fold divide by zero.
+      if (N->getOpcode() == ISD::VSDIV || N->getOpcode() == ISD::VUDIV) {
+        if ((RHSOp.getOpcode() == ISD::Constant &&
+             cast<ConstantSDNode>(RHSOp.Val)->isNullValue()) ||
+            (RHSOp.getOpcode() == ISD::ConstantFP &&
+             !cast<ConstantFPSDNode>(RHSOp.Val)->getValue()))
+          break;
+      }
       Ops.push_back(DAG.getNode(ScalarOp, EltType, LHSOp, RHSOp));
       AddToWorkList(Ops.back().Val);
       assert((Ops.back().getOpcode() == ISD::UNDEF ||