Fix PR1011 and CodeGen/Generic/2006-11-20-DAGCombineCrash.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31878 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index b74fbaece58f644ba9034aeec5bf603519fd8406..44990690b5dc96d11a8575b4c2d125897ece9ae3 100644 (file)
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -2180,10 +2180,10 @@ SDOperand DAGCombiner::visitTRUNCATE(SDNode *N) {
   // fold (truncate (ext x)) -> (ext x) or (truncate x) or x
   if (N0.getOpcode() == ISD::ZERO_EXTEND || N0.getOpcode() == ISD::SIGN_EXTEND||
       N0.getOpcode() == ISD::ANY_EXTEND) {
-    if (N0.getValueType() < VT)
+    if (N0.getOperand(0).getValueType() < VT)
       // if the source is smaller than the dest, we still need an extend
       return DAG.getNode(N0.getOpcode(), VT, N0.getOperand(0));
-    else if (N0.getValueType() > VT)
+    else if (N0.getOperand(0).getValueType() > VT)
       // if the source is larger than the dest, than we just need the truncate
       return DAG.getNode(ISD::TRUNCATE, VT, N0.getOperand(0));
     else