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

[Chris Lattner]

Changes in directory llvm/lib/CodeGen/SelectionDAG:

SelectionDAG.cpp updated: 1.24 -> 1.25
---
Log message:

shift X, 0 -> X



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Diffs of the changes:  (+6 -0)

Index: llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1.24 llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1.25
--- llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1.24	Mon Jan 10 17:25:25 2005
+++ llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp	Mon Jan 10 22:25:13 2005
@@ -612,6 +612,12 @@
       }
       break;
 
+    case ISD::SHL:
+    case ISD::SRL:
+    case ISD::SRA:
+      if (C2 == 0) return N1;
+      break;
+
     case ISD::AND:
       if (!C2) return N2;         // X and 0 -> 0
       if (N2C->isAllOnesValue())