#include "llvm/ADT/StringExtras.h"
using namespace llvm;
-
// Explicit instantiations of SymbolTableListTraits since some of the methods
// are not in the public header file...
template class llvm::SymbolTableListTraits<Argument, Function>;
// Argument Implementation
//===----------------------------------------------------------------------===//
+void Argument::anchor() { }
+
Argument::Argument(Type *Ty, const Twine &Name, Function *Par)
: Value(Ty, Value::ArgumentVal) {
Parent = 0;
return Result;
}
-FunctionType *Intrinsic::getType(LLVMContext &Context,
- ID id, ArrayRef<Type*> Tys) {
- Type *ResultTy = NULL;
- std::vector<Type*> ArgTys;
- bool IsVarArg = false;
+
+/// IIT_Info - These are enumerators that describe the entries returned by the
+/// getIntrinsicInfoTableEntries function.
+///
+/// NOTE: This must be kept in synch with the copy in TblGen/IntrinsicEmitter!
+enum IIT_Info {
+ // Common values should be encoded with 0-15.
+ IIT_Done = 0,
+ IIT_I1 = 1,
+ IIT_I8 = 2,
+ IIT_I16 = 3,
+ IIT_I32 = 4,
+ IIT_I64 = 5,
+ IIT_F32 = 6,
+ IIT_F64 = 7,
+ IIT_V2 = 8,
+ IIT_V4 = 9,
+ IIT_V8 = 10,
+ IIT_V16 = 11,
+ IIT_V32 = 12,
+ IIT_MMX = 13,
+ IIT_PTR = 14,
+ IIT_ARG = 15,
+
+ // Values from 16+ are only encodable with the inefficient encoding.
+ IIT_METADATA = 16,
+ IIT_EMPTYSTRUCT = 17,
+ IIT_STRUCT2 = 18,
+ IIT_STRUCT3 = 19,
+ IIT_STRUCT4 = 20,
+ IIT_STRUCT5 = 21,
+ IIT_EXTEND_VEC_ARG = 22,
+ IIT_TRUNC_VEC_ARG = 23,
+ IIT_ANYPTR = 24
+};
+
+
+static void DecodeIITType(unsigned &NextElt, ArrayRef<unsigned char> Infos,
+ SmallVectorImpl<Intrinsic::IITDescriptor> &OutputTable) {
+ IIT_Info Info = IIT_Info(Infos[NextElt++]);
+ unsigned StructElts = 2;
+ using namespace Intrinsic;
-#define GET_INTRINSIC_GENERATOR
+ switch (Info) {
+ case IIT_Done:
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Void, 0));
+ return;
+ case IIT_MMX:
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::MMX, 0));
+ return;
+ case IIT_METADATA:
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Metadata, 0));
+ return;
+ case IIT_F32:
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Float, 0));
+ return;
+ case IIT_F64:
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Double, 0));
+ return;
+ case IIT_I1:
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 1));
+ return;
+ case IIT_I8:
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 8));
+ return;
+ case IIT_I16:
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer,16));
+ return;
+ case IIT_I32:
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 32));
+ return;
+ case IIT_I64:
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 64));
+ return;
+ case IIT_V2:
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 2));
+ DecodeIITType(NextElt, Infos, OutputTable);
+ return;
+ case IIT_V4:
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 4));
+ DecodeIITType(NextElt, Infos, OutputTable);
+ return;
+ case IIT_V8:
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 8));
+ DecodeIITType(NextElt, Infos, OutputTable);
+ return;
+ case IIT_V16:
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 16));
+ DecodeIITType(NextElt, Infos, OutputTable);
+ return;
+ case IIT_V32:
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 32));
+ DecodeIITType(NextElt, Infos, OutputTable);
+ return;
+ case IIT_PTR:
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Pointer, 0));
+ DecodeIITType(NextElt, Infos, OutputTable);
+ return;
+ case IIT_ANYPTR: { // [ANYPTR addrspace, subtype]
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Pointer,
+ Infos[NextElt++]));
+ DecodeIITType(NextElt, Infos, OutputTable);
+ return;
+ }
+ case IIT_ARG: {
+ unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Argument, ArgInfo));
+ return;
+ }
+ case IIT_EXTEND_VEC_ARG: {
+ unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::ExtendVecArgument,
+ ArgInfo));
+ return;
+ }
+ case IIT_TRUNC_VEC_ARG: {
+ unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::TruncVecArgument,
+ ArgInfo));
+ return;
+ }
+ case IIT_EMPTYSTRUCT:
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Struct, 0));
+ return;
+ case IIT_STRUCT5: ++StructElts; // FALL THROUGH.
+ case IIT_STRUCT4: ++StructElts; // FALL THROUGH.
+ case IIT_STRUCT3: ++StructElts; // FALL THROUGH.
+ case IIT_STRUCT2: {
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Struct,StructElts));
+
+ for (unsigned i = 0; i != StructElts; ++i)
+ DecodeIITType(NextElt, Infos, OutputTable);
+ return;
+ }
+ }
+ llvm_unreachable("unhandled");
+}
+
+
+#define GET_INTRINSIC_GENERATOR_GLOBAL
#include "llvm/Intrinsics.gen"
-#undef GET_INTRINSIC_GENERATOR
+#undef GET_INTRINSIC_GENERATOR_GLOBAL
+
+void Intrinsic::getIntrinsicInfoTableEntries(ID id,
+ SmallVectorImpl<IITDescriptor> &T){
+ // Check to see if the intrinsic's type was expressible by the table.
+ unsigned TableVal = IIT_Table[id-1];
+
+ // Decode the TableVal into an array of IITValues.
+ SmallVector<unsigned char, 8> IITValues;
+ ArrayRef<unsigned char> IITEntries;
+ unsigned NextElt = 0;
+ if ((TableVal >> 31) != 0) {
+ // This is an offset into the IIT_LongEncodingTable.
+ IITEntries = IIT_LongEncodingTable;
+
+ // Strip sentinel bit.
+ NextElt = (TableVal << 1) >> 1;
+ } else {
+ // Decode the TableVal into an array of IITValues. If the entry was encoded
+ // into a single word in the table itself, decode it now.
+ do {
+ IITValues.push_back(TableVal & 0xF);
+ TableVal >>= 4;
+ } while (TableVal);
+
+ IITEntries = IITValues;
+ NextElt = 0;
+ }
+
+ // Okay, decode the table into the output vector of IITDescriptors.
+ DecodeIITType(NextElt, IITEntries, T);
+ while (NextElt != IITEntries.size() && IITEntries[NextElt] != 0)
+ DecodeIITType(NextElt, IITEntries, T);
+}
+
- return FunctionType::get(ResultTy, ArgTys, IsVarArg);
+static Type *DecodeFixedType(ArrayRef<Intrinsic::IITDescriptor> &Infos,
+ ArrayRef<Type*> Tys, LLVMContext &Context) {
+ using namespace Intrinsic;
+ IITDescriptor D = Infos.front();
+ Infos = Infos.slice(1);
+
+ switch (D.Kind) {
+ case IITDescriptor::Void: return Type::getVoidTy(Context);
+ case IITDescriptor::MMX: return Type::getX86_MMXTy(Context);
+ case IITDescriptor::Metadata: return Type::getMetadataTy(Context);
+ case IITDescriptor::Float: return Type::getFloatTy(Context);
+ case IITDescriptor::Double: return Type::getDoubleTy(Context);
+
+ case IITDescriptor::Integer:
+ return IntegerType::get(Context, D.Integer_Width);
+ case IITDescriptor::Vector:
+ return VectorType::get(DecodeFixedType(Infos, Tys, Context),D.Vector_Width);
+ case IITDescriptor::Pointer:
+ return PointerType::get(DecodeFixedType(Infos, Tys, Context),
+ D.Pointer_AddressSpace);
+ case IITDescriptor::Struct: {
+ Type *Elts[5];
+ assert(D.Struct_NumElements <= 5 && "Can't handle this yet");
+ for (unsigned i = 0, e = D.Struct_NumElements; i != e; ++i)
+ Elts[i] = DecodeFixedType(Infos, Tys, Context);
+ return StructType::get(Context, ArrayRef<Type*>(Elts,D.Struct_NumElements));
+ }
+
+ case IITDescriptor::Argument:
+ return Tys[D.getArgumentNumber()];
+ case IITDescriptor::ExtendVecArgument:
+ return VectorType::getExtendedElementVectorType(cast<VectorType>(
+ Tys[D.getArgumentNumber()]));
+
+ case IITDescriptor::TruncVecArgument:
+ return VectorType::getTruncatedElementVectorType(cast<VectorType>(
+ Tys[D.getArgumentNumber()]));
+ }
+ llvm_unreachable("unhandled");
+}
+
+
+
+FunctionType *Intrinsic::getType(LLVMContext &Context,
+ ID id, ArrayRef<Type*> Tys) {
+ SmallVector<IITDescriptor, 8> Table;
+ getIntrinsicInfoTableEntries(id, Table);
+
+ ArrayRef<IITDescriptor> TableRef = Table;
+ Type *ResultTy = DecodeFixedType(TableRef, Tys, Context);
+
+ SmallVector<Type*, 8> ArgTys;
+ while (!TableRef.empty())
+ ArgTys.push_back(DecodeFixedType(TableRef, Tys, Context));
+
+ return FunctionType::get(ResultTy, ArgTys, false);
}
bool Intrinsic::isOverloaded(ID id) {
- static const bool OTable[] = {
- false,
#define GET_INTRINSIC_OVERLOAD_TABLE
#include "llvm/Intrinsics.gen"
#undef GET_INTRINSIC_OVERLOAD_TABLE
- };
- return OTable[id];
}
/// This defines the "Intrinsic::getAttributes(ID id)" method.
bool Function::hasAddressTaken(const User* *PutOffender) const {
for (Value::const_use_iterator I = use_begin(), E = use_end(); I != E; ++I) {
const User *U = *I;
+ if (isa<BlockAddress>(U))
+ continue;
if (!isa<CallInst>(U) && !isa<InvokeInst>(U))
return PutOffender ? (*PutOffender = U, true) : true;
ImmutableCallSite CS(cast<Instruction>(U));
return false;
}
-// vim: sw=2 ai
+bool Function::isDefTriviallyDead() const {
+ // Check the linkage
+ if (!hasLinkOnceLinkage() && !hasLocalLinkage() &&
+ !hasAvailableExternallyLinkage())
+ return false;
+
+ // Check if the function is used by anything other than a blockaddress.
+ for (Value::const_use_iterator I = use_begin(), E = use_end(); I != E; ++I)
+ if (!isa<BlockAddress>(*I))
+ return false;
+
+ return true;
+}
+
+/// callsFunctionThatReturnsTwice - Return true if the function has a call to
+/// setjmp or other function that gcc recognizes as "returning twice".
+bool Function::callsFunctionThatReturnsTwice() const {
+ for (const_inst_iterator
+ I = inst_begin(this), E = inst_end(this); I != E; ++I) {
+ const CallInst* callInst = dyn_cast<CallInst>(&*I);
+ if (!callInst)
+ continue;
+ if (callInst->canReturnTwice())
+ return true;
+ }
+
+ return false;
+}
+
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