diff options
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp b/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp index da6d973e0b7..6a6114677cc 100644 --- a/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp @@ -652,7 +652,9 @@ void InstrEmitter::EmitRegSequence(SDNode *Node, const MCInstrDesc &II = TII->get(TargetOpcode::REG_SEQUENCE); MachineInstrBuilder MIB = BuildMI(*MF, Node->getDebugLoc(), II, NewVReg); unsigned NumOps = Node->getNumOperands(); - // REG_SEQUENCE can "inherit" a chain from a subnode. + // If the input pattern has a chain, then the root of the corresponding + // output pattern will get a chain as well. This can happen to be a + // REG_SEQUENCE (which is not "guarded" by countOperands/CountResults). if (NumOps && Node->getOperand(NumOps-1).getValueType() == MVT::Other) --NumOps; // Ignore chain if it exists. |
