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https://github.com/c64scene-ar/llvm-6502.git
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* Correctly delete TypeHandles in AsmParser. In addition to not leaking memory, this prevents a bug that could have occurred when a type got resolved that the constexpr was using * Check for errors in the AsmParser instead of hitting assertion failures deep in the code * Simplify the interface to the ConstantExpr class, removing unneccesary parameters to the ::get* methods. * Rename the 'getelementptr' version of ConstantExpr::get to ConstantExpr::getGetElementPtr git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3161 91177308-0d34-0410-b5e6-96231b3b80d8
208 lines
6.7 KiB
C++
208 lines
6.7 KiB
C++
//===-- WriteConst.cpp - Functions for writing constants ---------*- C++ -*--=//
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//
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// This file implements the routines for encoding constants to a bytecode
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// stream.
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//
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// Note that the performance of this library is not terribly important, because
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// it shouldn't be used by JIT type applications... so it is not a huge focus
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// at least. :)
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//
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//===----------------------------------------------------------------------===//
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#include "WriterInternals.h"
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#include "llvm/Constants.h"
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#include "llvm/SymbolTable.h"
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#include "llvm/DerivedTypes.h"
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#include <iostream>
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using std::cerr;
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void BytecodeWriter::outputType(const Type *T) {
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output_vbr((unsigned)T->getPrimitiveID(), Out);
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// That's all there is to handling primitive types...
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if (T->isPrimitiveType())
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return; // We might do this if we alias a prim type: %x = type int
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switch (T->getPrimitiveID()) { // Handle derived types now.
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case Type::FunctionTyID: {
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const FunctionType *MT = cast<const FunctionType>(T);
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int Slot = Table.getValSlot(MT->getReturnType());
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assert(Slot != -1 && "Type used but not available!!");
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output_vbr((unsigned)Slot, Out);
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// Output the number of arguments to method (+1 if varargs):
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output_vbr(MT->getParamTypes().size()+MT->isVarArg(), Out);
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// Output all of the arguments...
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FunctionType::ParamTypes::const_iterator I = MT->getParamTypes().begin();
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for (; I != MT->getParamTypes().end(); ++I) {
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Slot = Table.getValSlot(*I);
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assert(Slot != -1 && "Type used but not available!!");
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output_vbr((unsigned)Slot, Out);
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}
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// Terminate list with VoidTy if we are a varargs function...
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if (MT->isVarArg())
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output_vbr((unsigned)Type::VoidTy->getPrimitiveID(), Out);
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break;
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}
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case Type::ArrayTyID: {
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const ArrayType *AT = cast<const ArrayType>(T);
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int Slot = Table.getValSlot(AT->getElementType());
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assert(Slot != -1 && "Type used but not available!!");
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output_vbr((unsigned)Slot, Out);
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//cerr << "Type slot = " << Slot << " Type = " << T->getName() << endl;
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output_vbr(AT->getNumElements(), Out);
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break;
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}
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case Type::StructTyID: {
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const StructType *ST = cast<const StructType>(T);
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// Output all of the element types...
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StructType::ElementTypes::const_iterator I = ST->getElementTypes().begin();
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for (; I != ST->getElementTypes().end(); ++I) {
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int Slot = Table.getValSlot(*I);
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assert(Slot != -1 && "Type used but not available!!");
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output_vbr((unsigned)Slot, Out);
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}
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// Terminate list with VoidTy
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output_vbr((unsigned)Type::VoidTy->getPrimitiveID(), Out);
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break;
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}
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case Type::PointerTyID: {
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const PointerType *PT = cast<const PointerType>(T);
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int Slot = Table.getValSlot(PT->getElementType());
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assert(Slot != -1 && "Type used but not available!!");
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output_vbr((unsigned)Slot, Out);
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break;
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}
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case Type::OpaqueTyID: {
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// No need to emit anything, just the count of opaque types is enough.
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break;
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}
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//case Type::PackedTyID:
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default:
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cerr << __FILE__ << ":" << __LINE__ << ": Don't know how to serialize"
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<< " Type '" << T->getDescription() << "'\n";
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break;
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}
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}
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bool BytecodeWriter::outputConstant(const Constant *CPV) {
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// We must check for a ConstantExpr before switching by type because
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// a ConstantExpr can be of any type, and has no explicit value.
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//
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if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) {
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// FIXME: Encoding of constant exprs could be much more compact!
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assert(CE->getNumOperands() > 0 && "ConstantExpr with 0 operands");
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output_vbr(CE->getNumOperands(), Out); // flags as an expr
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output_vbr(CE->getOpcode(), Out); // flags as an expr
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for (User::const_op_iterator OI = CE->op_begin(); OI != CE->op_end(); ++OI){
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int Slot = Table.getValSlot(*OI);
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assert(Slot != -1 && "Unknown constant used in ConstantExpr!!");
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output_vbr((unsigned)Slot, Out);
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Slot = Table.getValSlot((*OI)->getType());
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output_vbr((unsigned)Slot, Out);
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}
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return false;
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} else {
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output_vbr((unsigned)0, Out); // flag as not a ConstantExpr
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}
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switch (CPV->getType()->getPrimitiveID()) {
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case Type::BoolTyID: // Boolean Types
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if (cast<const ConstantBool>(CPV)->getValue())
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output_vbr((unsigned)1, Out);
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else
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output_vbr((unsigned)0, Out);
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break;
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case Type::UByteTyID: // Unsigned integer types...
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case Type::UShortTyID:
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case Type::UIntTyID:
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case Type::ULongTyID:
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output_vbr(cast<const ConstantUInt>(CPV)->getValue(), Out);
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break;
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case Type::SByteTyID: // Signed integer types...
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case Type::ShortTyID:
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case Type::IntTyID:
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case Type::LongTyID:
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output_vbr(cast<const ConstantSInt>(CPV)->getValue(), Out);
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break;
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case Type::TypeTyID: // Serialize type type
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assert(0 && "Types should not be in the Constant!");
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break;
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case Type::ArrayTyID: {
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const ConstantArray *CPA = cast<const ConstantArray>(CPV);
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unsigned size = CPA->getValues().size();
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assert(size == cast<ArrayType>(CPA->getType())->getNumElements()
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&& "ConstantArray out of whack!");
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for (unsigned i = 0; i < size; i++) {
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int Slot = Table.getValSlot(CPA->getOperand(i));
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assert(Slot != -1 && "Constant used but not available!!");
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output_vbr((unsigned)Slot, Out);
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}
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break;
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}
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case Type::StructTyID: {
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const ConstantStruct *CPS = cast<const ConstantStruct>(CPV);
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const std::vector<Use> &Vals = CPS->getValues();
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for (unsigned i = 0; i < Vals.size(); ++i) {
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int Slot = Table.getValSlot(Vals[i]);
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assert(Slot != -1 && "Constant used but not available!!");
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output_vbr((unsigned)Slot, Out);
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}
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break;
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}
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case Type::PointerTyID: {
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const ConstantPointer *CPP = cast<const ConstantPointer>(CPV);
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if (isa<ConstantPointerNull>(CPP)) {
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output_vbr((unsigned)0, Out);
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} else if (const ConstantPointerRef *CPR =
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dyn_cast<ConstantPointerRef>(CPP)) {
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output_vbr((unsigned)1, Out);
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int Slot = Table.getValSlot((Value*)CPR->getValue());
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assert(Slot != -1 && "Global used but not available!!");
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output_vbr((unsigned)Slot, Out);
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} else {
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assert(0 && "Unknown ConstantPointer Subclass!");
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}
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break;
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}
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case Type::FloatTyID: { // Floating point types...
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float Tmp = (float)cast<ConstantFP>(CPV)->getValue();
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output_data(&Tmp, &Tmp+1, Out);
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break;
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}
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case Type::DoubleTyID: {
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double Tmp = cast<ConstantFP>(CPV)->getValue();
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output_data(&Tmp, &Tmp+1, Out);
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break;
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}
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case Type::VoidTyID:
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case Type::LabelTyID:
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default:
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cerr << __FILE__ << ":" << __LINE__ << ": Don't know how to serialize"
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<< " type '" << CPV->getType()->getName() << "'\n";
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break;
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}
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return false;
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}
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