commit 64d28460170910ae7dddcc4e227d5b46d3135d49
author Evan Cheng <evan.cheng@apple.com> Wed May 31 06:08:35 2006 +0000
committer Evan Cheng <evan.cheng@apple.com> Wed May 31 06:08:35 2006 +0000
tree 1da13eea231e4715c44623cfc1739940087f042c
parent 03977ec9b179ffbbc7b66505a9071547e9bb5e29

visitVBinOp: Can't fold divide by zero!

llvm-svn: 28584

llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index c05c976..938e17a 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -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 ||