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

[Andrew Lenharth]

Changes in directory llvm/lib/CodeGen/SelectionDAG:

LegalizeDAG.cpp updated: 1.211 -> 1.212
---
Log message:

The first patch of X86 support for read cycle counter

---
Diffs of the changes:  (+12 -0)

 LegalizeDAG.cpp |   12 ++++++++++++
 1 files changed, 12 insertions(+)


Index: llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.211 llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.212
--- llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.211	Fri Nov 18 23:51:46 2005
+++ llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp	Sun Nov 20 15:32:07 2005
@@ -1168,6 +1168,7 @@
     if (Tmp1 != Node->getOperand(0))
       Result = DAG.getNode(ISD::READCYCLECOUNTER, MVT::i64, Tmp1);
     break;
+
   case ISD::TRUNCSTORE:
     Tmp1 = LegalizeOp(Node->getOperand(0));  // Legalize the chain.
     Tmp3 = LegalizeOp(Node->getOperand(2));  // Legalize the pointer.
@@ -3336,6 +3337,17 @@
     Hi = DAG.getConstant(0, NVT);
     break;
   }
+
+  case ISD::READCYCLECOUNTER:
+    if (TLI.getOperationAction(ISD::READCYCLECOUNTER, VT) == TargetLowering::Custom) {
+      SDOperand Chain = LegalizeOp(Node->getOperand(0));
+      AddLegalizedOperand(SDOperand(Node, 1), Chain);
+      SDOperand t = TLI.LowerOperation(Op, DAG);
+      ExpandOp(t, Lo, Hi);
+    } else
+      assert(0 && "Must custom expand ReadCycleCounter");
+    break;
+
     // These operators cannot be expanded directly, emit them as calls to
     // library functions.
   case ISD::FP_TO_SINT: