+CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
+ TheDef = R;
+ std::string DefName = R->getName();
+ ModRef = WriteMem;
+ isOverloaded = false;
+ isCommutative = false;
+
+ if (DefName.size() <= 4 ||
+ std::string(DefName.begin(), DefName.begin()+4) != "int_")
+ throw "Intrinsic '" + DefName + "' does not start with 'int_'!";
+ EnumName = std::string(DefName.begin()+4, DefName.end());
+ if (R->getValue("GCCBuiltinName")) // Ignore a missing GCCBuiltinName field.
+ GCCBuiltinName = R->getValueAsString("GCCBuiltinName");
+ TargetPrefix = R->getValueAsString("TargetPrefix");
+ Name = R->getValueAsString("LLVMName");
+ if (Name == "") {
+ // If an explicit name isn't specified, derive one from the DefName.
+ Name = "llvm.";
+ for (unsigned i = 0, e = EnumName.size(); i != e; ++i)
+ if (EnumName[i] == '_')
+ Name += '.';
+ else
+ Name += EnumName[i];
+ } else {
+ // Verify it starts with "llvm.".
+ if (Name.size() <= 5 ||
+ std::string(Name.begin(), Name.begin()+5) != "llvm.")
+ throw "Intrinsic '" + DefName + "'s name does not start with 'llvm.'!";
+ }
+
+ // If TargetPrefix is specified, make sure that Name starts with
+ // "llvm.<targetprefix>.".
+ if (!TargetPrefix.empty()) {
+ if (Name.size() < 6+TargetPrefix.size() ||
+ std::string(Name.begin()+5, Name.begin()+6+TargetPrefix.size())
+ != (TargetPrefix+"."))
+ throw "Intrinsic '" + DefName + "' does not start with 'llvm." +
+ TargetPrefix + ".'!";
+ }
+
+ // Parse the list of argument types.
+ ListInit *TypeList = R->getValueAsListInit("Types");
+ for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
+ Record *TyEl = TypeList->getElementAsRecord(i);
+ assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
+ MVT::SimpleValueType VT = getValueType(TyEl->getValueAsDef("VT"));
+ isOverloaded |= VT == MVT::iAny || VT == MVT::fAny;
+ ArgVTs.push_back(VT);
+ ArgTypeDefs.push_back(TyEl);
+ }
+ if (ArgVTs.size() == 0)
+ throw "Intrinsic '"+DefName+"' needs at least a type for the ret value!";