use chain operands to ensure the copies don't wander from the rdtsc instruction.
llvm-svn: 24434
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index aa221fb..b0fa74d 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -914,9 +914,15 @@
DAG.getSrcValue(NULL));
}
case ISD::READCYCLECOUNTER: {
- SDOperand rd = DAG.getNode(X86ISD::RDTSC_DAG, MVT::Other, Op.getOperand(0));
- SDOperand Lo = DAG.getCopyFromReg(rd, X86::EAX, MVT::i32);
- SDOperand Hi = DAG.getCopyFromReg(rd, X86::EDX, MVT::i32);
+ std::vector<MVT::ValueType> Tys;
+ Tys.push_back(MVT::Other);
+ Tys.push_back(MVT::Flag);
+ std::vector<SDOperand> Ops;
+ Ops.push_back(Op.getOperand(0));
+ SDOperand rd = DAG.getNode(X86ISD::RDTSC_DAG, Tys, Ops);
+ SDOperand Lo = DAG.getCopyFromReg(rd, X86::EAX, MVT::i32, rd.getValue(1));
+ SDOperand Hi = DAG.getCopyFromReg(Lo.getValue(1), X86::EDX,
+ MVT::i32, Lo.getValue(2));
return DAG.getNode(ISD::BUILD_PAIR, MVT::i64, Lo, Hi);
}
}