[X86] In matchBitExtract, if we need to truncate the BEXTR make sure we put the BEXTR...

We were using OrigNBits, but that doesn't guarantee that it will be selected before the nodes that make up X.

llvm-svn: 356978

diff --git a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
index 4cf7b02..38c1c6b 100644 (file)
--- a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -3086,7 +3086,7 @@ bool X86DAGToDAGISel::matchBitExtract(SDNode *Node) {
 
   // The 'X' was originally truncated. Do that now.
   if (XVT != NVT) {
-    insertDAGNode(*CurDAG, OrigNBits, Extract);
+    insertDAGNode(*CurDAG, SDValue(Node, 0), Extract);
     Extract = CurDAG->getNode(ISD::TRUNCATE, DL, NVT, Extract);
   }