[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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@356978 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelDAGToDAG.cpp b/lib/Target/X86/X86ISelDAGToDAG.cpp
index 4cf7b02a24c9d49206665f1fa791ed71ec033166..38c1c6ba8d0ebef3217a2f1f2883e07293ca4c96 100644 (file)
--- a/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/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);
   }