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Diffstat (limited to 'utils/TableGen/CodeGenInstruction.cpp')
| -rw-r--r-- | utils/TableGen/CodeGenInstruction.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/utils/TableGen/CodeGenInstruction.cpp b/utils/TableGen/CodeGenInstruction.cpp index 751326c8ad..b4f9d15071 100644 --- a/utils/TableGen/CodeGenInstruction.cpp +++ b/utils/TableGen/CodeGenInstruction.cpp @@ -424,6 +424,13 @@ bool CodeGenInstAlias::tryAliasOpMatch(DagInit *Result, unsigned AliasOpNo, // Handle explicit registers. if (ADI && ADI->getDef()->isSubClassOf("Register")) { + if (InstOpRec->isSubClassOf("OptionalDefOperand")) { + DagInit *DI = InstOpRec->getValueAsDag("MIOperandInfo"); + // The operand info should only have a single (register) entry. We + // want the register class of it. + InstOpRec = dynamic_cast<DefInit*>(DI->getArg(0))->getDef(); + } + if (InstOpRec->isSubClassOf("RegisterOperand")) InstOpRec = InstOpRec->getValueAsDef("RegClass"); |