diff options
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp index 871ab9b2988..e887af4ca58 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp @@ -5344,14 +5344,15 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) { return nullptr; } - // PHI nodes have already been selected, so we should know which VReg that - // is assigns to already. - if (isa<PHINode>(V)) { + // The value is not used in this block yet (or it would have an SDNode). + // We still want the value to appear for the user if possible -- if it has + // an associated VReg, we can refer to that instead. + if (!isa<Argument>(V)) { auto VMI = FuncInfo.ValueMap.find(V); if (VMI != FuncInfo.ValueMap.end()) { unsigned Reg = VMI->second; - // The PHI node may be split up into several MI PHI nodes (in - // FunctionLoweringInfo::set). + // If this is a PHI node, it may be split up into several MI PHI nodes + // (in FunctionLoweringInfo::set). RegsForValue RFV(V->getContext(), TLI, DAG.getDataLayout(), Reg, V->getType(), None); if (RFV.occupiesMultipleRegs()) { |