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

[Chris Lattner]

Changes in directory llvm/lib/CodeGen/SelectionDAG:

SelectionDAG.cpp updated: 1.396 -> 1.397
---
Log message:

fold noop vbitconvert instructions


---
Diffs of the changes:  (+9 -0)

 SelectionDAG.cpp |    9 +++++++++
 1 files changed, 9 insertions(+)


Index: llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1.396 llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1.397
--- llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1.396	Mon Apr  9 00:23:13 2007
+++ llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp	Thu Apr 12 00:58:43 2007
@@ -1484,6 +1484,15 @@
            MVT::getVectorNumElements(VT) == N3.getNumOperands() &&
            "Illegal VECTOR_SHUFFLE node!");
     break;
+  case ISD::VBIT_CONVERT:
+    // Fold vbit_convert nodes from a type to themselves.
+    if (N1.getValueType() == MVT::Vector) {
+      assert(isa<ConstantSDNode>(*(N1.Val->op_end()-2)) &&
+             isa<VTSDNode>(*(N1.Val->op_end()-1)) && "Malformed vector input!");
+      if (*(N1.Val->op_end()-2) == N2 && *(N1.Val->op_end()-1) == N3)
+        return N1;
+    }
+    break;
   }
 
   // Memoize node if it doesn't produce a flag.