From 81363c387124a8788b2f8b469d357638a690708c Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Sun, 20 Nov 2005 22:01:40 +0000 Subject: [PATCH] use chain operands to ensure the copies don't wander from the rdtsc instruction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24434 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/X86/X86ISelLowering.cpp | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index aa221fbda3d..b0fa74d8c23 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -914,9 +914,15 @@ SDOperand X86TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) { 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 Tys; + Tys.push_back(MVT::Other); + Tys.push_back(MVT::Flag); + std::vector 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); } }