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

[Chris Lattner]

Changes in directory llvm/lib/Target:

TargetLowering.cpp updated: 1.41 -> 1.42
---
Log message:

Add interfaces for targets to provide target-specific dag combiner optimizations.


---
Diffs of the changes:  (+8 -0)

 TargetLowering.cpp |    8 ++++++++
 1 files changed, 8 insertions(+)


Index: llvm/lib/Target/TargetLowering.cpp
diff -u llvm/lib/Target/TargetLowering.cpp:1.41 llvm/lib/Target/TargetLowering.cpp:1.42
--- llvm/lib/Target/TargetLowering.cpp:1.41	Sun Feb 26 19:00:42 2006
+++ llvm/lib/Target/TargetLowering.cpp	Tue Feb 28 22:52:55 2006
@@ -30,6 +30,8 @@
   ShiftAmountTy = SetCCResultTy = PointerTy = getValueType(TD.getIntPtrType());
   ShiftAmtHandling = Undefined;
   memset(RegClassForVT, 0,MVT::LAST_VALUETYPE*sizeof(TargetRegisterClass*));
+  memset(TargetDAGCombineArray, 0, 
+         sizeof(TargetDAGCombineArray)/sizeof(TargetDAGCombineArray[0]));
   maxStoresPerMemset = maxStoresPerMemcpy = maxStoresPerMemmove = 8;
   allowUnalignedMemoryAccesses = false;
   UseUnderscoreSetJmpLongJmp = false;
@@ -916,6 +918,12 @@
   KnownOne = 0;
 }
 
+SDOperand TargetLowering::
+PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const {
+  // Default implementation: no optimization.
+  return SDOperand();
+}
+
 //===----------------------------------------------------------------------===//
 //  Inline Assembler Implementation Methods
 //===----------------------------------------------------------------------===//