From 4e3adfde653e8216a7f6faa726775f63f16e28d2 Mon Sep 17 00:00:00 2001 From: Eli Friedman Date: Tue, 14 Jun 2011 22:16:20 +0000 Subject: [PATCH] PR10136: fix PPCTargetLowering::LowerCall_SVR4 so that a necessary CopyToReg doesn't appear to be dead. Roman, since you're writing tests for other PPC-SVR4 vararg-related stuff, would you mind writing a test for this? git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133018 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/PowerPC/PPCISelLowering.cpp | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp index dbb184c1f6b..55c15ec4f86 100644 --- a/lib/Target/PowerPC/PPCISelLowering.cpp +++ b/lib/Target/PowerPC/PPCISelLowering.cpp @@ -2902,6 +2902,12 @@ PPCTargetLowering::LowerCall_SVR4(SDValue Chain, SDValue Callee, Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &MemOpChains[0], MemOpChains.size()); + // Set CR6 to true if this is a vararg call. + if (isVarArg) { + SDValue SetCR(DAG.getMachineNode(PPC::CRSET, dl, MVT::i32), 0); + RegsToPass.push_back(std::make_pair(unsigned(PPC::CR1EQ), SetCR)); + } + // Build a sequence of copy-to-reg nodes chained together with token chain // and flag operands which copy the outgoing args into the appropriate regs. SDValue InFlag; @@ -2911,13 +2917,6 @@ PPCTargetLowering::LowerCall_SVR4(SDValue Chain, SDValue Callee, InFlag = Chain.getValue(1); } - // Set CR6 to true if this is a vararg call. - if (isVarArg) { - SDValue SetCR(DAG.getMachineNode(PPC::CRSET, dl, MVT::i32), 0); - Chain = DAG.getCopyToReg(Chain, dl, PPC::CR1EQ, SetCR, InFlag); - InFlag = Chain.getValue(1); - } - if (isTailCall) PrepareTailCall(DAG, InFlag, Chain, dl, false, SPDiff, NumBytes, LROp, FPOp, false, TailCallArguments);