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

[Nate Begeman]

Changes in directory llvm/lib/CodeGen/SelectionDAG:

SelectionDAG.cpp updated: 1.82 -> 1.83
---
Log message:

Add a couple missing transforms in getSetCC that were triggering assertions
in the PPC Pattern ISel


---
Diffs of the changes:  (+8 -1)

 SelectionDAG.cpp |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletion(-)


Index: llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1.82 llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1.83
--- llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1.82	Wed Apr 13 16:23:31 2005
+++ llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp	Thu Apr 14 03:56:52 2005
@@ -436,11 +436,18 @@
         N2C = cast<ConstantSDNode>(N2.Val);
       }
       
+      if ((Cond == ISD::SETLT || Cond == ISD::SETULT) && C2 == MinVal)
+        return getConstant(0, VT);      // X < MIN --> false
+        
+      // Canonicalize setgt X, Min --> setne X, Min
+      if ((Cond == ISD::SETGT || Cond == ISD::SETUGT) && C2 == MinVal)
+        return getSetCC(ISD::SETNE, VT, N1, N2);
+        
       // If we have setult X, 1, turn it into seteq X, 0
       if ((Cond == ISD::SETLT || Cond == ISD::SETULT) && C2 == MinVal+1)
         return getSetCC(ISD::SETEQ, VT, N1,
                         getConstant(MinVal, N1.getValueType()));
-      // If we have setult X, 1, turn it into seteq X, 0
+      // If we have setugt X, Max-1, turn it into seteq X, Max
       else if ((Cond == ISD::SETGT || Cond == ISD::SETUGT) && C2 == MaxVal-1)
         return getSetCC(ISD::SETEQ, VT, N1,
                         getConstant(MaxVal, N1.getValueType()));