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[TableGen] Handle (outs variable_ops)
When `variable_ops` is specified in `InOperandList` of instruction, it behaves as expected, i.e., does not count as operand. So for `(ins variable_ops)` instruction description will have 0 operands. However when used in OutOperandList it is counted as operand. So `(outs variable_ops)` results in instruction with one def. This patch makes behavior of `variable_ops` in `out` list to match that of `in` list. Reviewed By: reames Differential Revision: https://reviews.llvm.org/D81095
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@ -56,6 +56,7 @@ CGIOperandList::CGIOperandList(Record *R) : TheDef(R) {
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std::set<std::string> OperandNames;
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unsigned e = InDI->getNumArgs() + OutDI->getNumArgs();
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OperandList.reserve(e);
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bool VariadicOuts = false;
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for (unsigned i = 0; i != e; ++i){
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Init *ArgInit;
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StringRef ArgName;
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@ -109,6 +110,8 @@ CGIOperandList::CGIOperandList(Record *R) : TheDef(R) {
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else if (Rec->isSubClassOf("OptionalDefOperand"))
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hasOptionalDef = true;
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} else if (Rec->getName() == "variable_ops") {
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if (i < NumDefs)
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VariadicOuts = true;
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isVariadic = true;
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continue;
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} else if (Rec->isSubClassOf("RegisterClass")) {
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@ -137,6 +140,8 @@ CGIOperandList::CGIOperandList(Record *R) : TheDef(R) {
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MIOperandNo += NumOps;
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}
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if (VariadicOuts)
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--NumDefs;
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// Make sure the constraints list for each operand is large enough to hold
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// constraint info, even if none is present.
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