[llvm-commits] CVS: llvm/lib/Target/TargetLowering.cpp

[Chris Lattner]

Changes in directory llvm/lib/Target:

TargetLowering.cpp updated: 1.43 -> 1.44
---
Log message:

Do not fold (add (shl x, c1), (shl c2, c1)) -> (shl (add x, c2), c1),
we want to canonicalize the other way.


---
Diffs of the changes:  (+0 -18)

 TargetLowering.cpp |   18 ------------------
 1 files changed, 18 deletions(-)


Index: llvm/lib/Target/TargetLowering.cpp
diff -u llvm/lib/Target/TargetLowering.cpp:1.43 llvm/lib/Target/TargetLowering.cpp:1.44
--- llvm/lib/Target/TargetLowering.cpp:1.43	Fri Mar  3 00:58:59 2006
+++ llvm/lib/Target/TargetLowering.cpp	Sun Mar  5 13:52:57 2006
@@ -580,24 +580,6 @@
                                        CountTrailingZeros_64(~KnownZero2));
       KnownZero = (1ULL << KnownZeroOut) - 1;
       KnownOne = 0;
-      
-      SDOperand SH = Op.getOperand(0);
-      // fold (add (shl x, c1), (shl c2, c1)) -> (shl (add x, c2), c1)
-      if (KnownZero && SH.getOpcode() == ISD::SHL && SH.Val->hasOneUse() &&
-          Op.Val->hasOneUse()) {
-        if (ConstantSDNode *SA = dyn_cast<ConstantSDNode>(SH.getOperand(1))) {
-          MVT::ValueType VT = Op.getValueType();
-          unsigned ShiftAmt = SA->getValue();
-          uint64_t AddAmt = AA->getValue();
-          uint64_t AddShr = AddAmt >> ShiftAmt;
-          if (AddAmt == (AddShr << ShiftAmt)) {
-            SDOperand ADD = TLO.DAG.getNode(ISD::ADD, VT, SH.getOperand(0),
-                                            TLO.DAG.getConstant(AddShr, VT));
-            SDOperand SHL = TLO.DAG.getNode(ISD::SHL, VT, ADD,SH.getOperand(1));
-            return TLO.CombineTo(Op, SHL);
-          }
-        }
-      }
     }
     break;
   case ISD::SUB: