diff options
Diffstat (limited to 'utils/TableGen/FastISelEmitter.cpp')
| -rw-r--r-- | utils/TableGen/FastISelEmitter.cpp | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/utils/TableGen/FastISelEmitter.cpp b/utils/TableGen/FastISelEmitter.cpp index ce821765a2..e3d47aa49a 100644 --- a/utils/TableGen/FastISelEmitter.cpp +++ b/utils/TableGen/FastISelEmitter.cpp @@ -190,14 +190,22 @@ struct OperandsSignature { if (!Op->isLeaf() && Op->getOperator()->getName() == "imm") { unsigned PredNo = 0; if (!Op->getPredicateFns().empty()) { + TreePredicateFn PredFn = Op->getPredicateFns()[0]; // If there is more than one predicate weighing in on this operand // then we don't handle it. This doesn't typically happen for // immediates anyway. if (Op->getPredicateFns().size() > 1 || - !Op->getPredicateFns()[0].isImmediatePattern()) + !PredFn.isImmediatePattern()) + return false; + // Ignore any instruction with 'FastIselShouldIgnore', these are + // not needed and just bloat the fast instruction selector. For + // example, X86 doesn't need to generate code to match ADD16ri8 since + // ADD16ri will do just fine. + Record *Rec = PredFn.getOrigPatFragRecord()->getRecord(); + if (Rec->getValueAsBit("FastIselShouldIgnore")) return false; - PredNo = ImmediatePredicates.getIDFor(Op->getPredicateFns()[0])+1; + PredNo = ImmediatePredicates.getIDFor(PredFn)+1; } // Handle unmatched immediate sizes here. |