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339 lines
10 KiB
C++
339 lines
10 KiB
C++
//===-- Writer.cpp - Library for Printing VM assembly files ------*- C++ -*--=//
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//
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// This library implements the functionality defined in llvm/Assembly/Writer.h
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//
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// This library uses the Analysis library to figure out offsets for
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// variables in the method tables...
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//
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// TODO: print out the type name instead of the full type if a particular type
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// is in the symbol table...
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Assembly/Writer.h"
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#include "llvm/Analysis/SlotCalculator.h"
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#include "llvm/Module.h"
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#include "llvm/Method.h"
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#include "llvm/BasicBlock.h"
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#include "llvm/ConstPoolVals.h"
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#include "llvm/iOther.h"
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#include "llvm/iMemory.h"
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class AssemblyWriter : public ModuleAnalyzer {
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ostream &Out;
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SlotCalculator &Table;
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public:
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inline AssemblyWriter(ostream &o, SlotCalculator &Tab) : Out(o), Table(Tab) {
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}
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inline void write(const Module *M) { processModule(M); }
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inline void write(const Method *M) { processMethod(M); }
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inline void write(const BasicBlock *BB) { processBasicBlock(BB); }
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inline void write(const Instruction *I) { processInstruction(I); }
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inline void write(const ConstPoolVal *CPV) { processConstant(CPV); }
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protected:
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virtual bool visitMethod(const Method *M);
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virtual bool processConstPool(const ConstantPool &CP, bool isMethod);
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virtual bool processConstant(const ConstPoolVal *CPV);
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virtual bool processMethod(const Method *M);
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virtual bool processMethodArgument(const MethodArgument *MA);
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virtual bool processBasicBlock(const BasicBlock *BB);
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virtual bool processInstruction(const Instruction *I);
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private :
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void writeOperand(const Value *Op, bool PrintType, bool PrintName = true);
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};
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// visitMethod - This member is called after the above two steps, visting each
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// method, because they are effectively values that go into the constant pool.
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//
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bool AssemblyWriter::visitMethod(const Method *M) {
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return false;
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}
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bool AssemblyWriter::processConstPool(const ConstantPool &CP, bool isMethod) {
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// Done printing arguments...
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if (isMethod) Out << ")\n";
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ModuleAnalyzer::processConstPool(CP, isMethod);
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if (isMethod)
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Out << "begin";
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else
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Out << "implementation\n";
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return false;
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}
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// processConstant - Print out a constant pool entry...
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//
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bool AssemblyWriter::processConstant(const ConstPoolVal *CPV) {
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Out << "\t";
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// Print out name if it exists...
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if (CPV->hasName())
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Out << "%" << CPV->getName() << " = ";
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// Print out the opcode...
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Out << CPV->getType();
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// Write the value out now...
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writeOperand(CPV, false, false);
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if (!CPV->hasName() && CPV->getType() != Type::VoidTy) {
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int Slot = Table.getValSlot(CPV); // Print out the def slot taken...
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Out << "\t\t; <" << CPV->getType() << ">:";
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if (Slot >= 0) Out << Slot;
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else Out << "<badref>";
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}
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Out << endl;
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return false;
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}
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// processMethod - Process all aspects of a method.
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//
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bool AssemblyWriter::processMethod(const Method *M) {
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// Print out the return type and name...
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Out << "\n" << M->getReturnType() << " \"" << M->getName() << "\"(";
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Table.incorporateMethod(M);
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ModuleAnalyzer::processMethod(M);
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Table.purgeMethod();
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Out << "end\n";
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return false;
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}
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// processMethodArgument - This member is called for every argument that
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// is passed into the method. Simply print it out
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//
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bool AssemblyWriter::processMethodArgument(const MethodArgument *Arg) {
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// Insert commas as we go... the first arg doesn't get a comma
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if (Arg != Arg->getParent()->getArgumentList().front()) Out << ", ";
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// Output type...
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Out << Arg->getType();
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// Output name, if available...
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if (Arg->hasName())
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Out << " %" << Arg->getName();
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else if (Table.getValSlot(Arg) < 0)
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Out << "<badref>";
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return false;
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}
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// processBasicBlock - This member is called for each basic block in a methd.
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//
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bool AssemblyWriter::processBasicBlock(const BasicBlock *BB) {
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if (BB->hasName()) { // Print out the label if it exists...
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Out << "\n" << BB->getName() << ":";
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} else {
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int Slot = Table.getValSlot(BB);
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Out << "\n; <label>:";
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if (Slot >= 0)
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Out << Slot; // Extra newline seperates out label's
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else
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Out << "<badref>";
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}
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Out << "\t\t\t\t\t;[#uses=" << BB->use_size() << "]\n"; // Output # uses
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ModuleAnalyzer::processBasicBlock(BB);
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return false;
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}
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// processInstruction - This member is called for each Instruction in a methd.
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//
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bool AssemblyWriter::processInstruction(const Instruction *I) {
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Out << "\t";
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// Print out name if it exists...
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if (I && I->hasName())
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Out << "%" << I->getName() << " = ";
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// Print out the opcode...
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Out << I->getOpcode();
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// Print out the type of the operands...
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const Value *Operand = I->getOperand(0);
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// Special case conditional branches to swizzle the condition out to the front
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if (I->getInstType() == Instruction::Br && I->getOperand(1)) {
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writeOperand(I->getOperand(2), true);
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Out << ",";
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writeOperand(Operand, true);
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Out << ",";
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writeOperand(I->getOperand(1), true);
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} else if (I->getInstType() == Instruction::Switch) {
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// Special case switch statement to get formatting nice and correct...
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writeOperand(Operand , true); Out << ",";
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writeOperand(I->getOperand(1), true); Out << " [";
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for (unsigned op = 2; (Operand = I->getOperand(op)); op += 2) {
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Out << "\n\t\t";
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writeOperand(Operand, true); Out << ",";
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writeOperand(I->getOperand(op+1), true);
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}
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Out << "\n\t]";
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} else if (I->getInstType() == Instruction::PHINode) {
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Out << " " << Operand->getType();
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Out << " ["; writeOperand(Operand, false); Out << ",";
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writeOperand(I->getOperand(1), false); Out << " ]";
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for (unsigned op = 2; (Operand = I->getOperand(op)); op += 2) {
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Out << ", ["; writeOperand(Operand, false); Out << ",";
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writeOperand(I->getOperand(op+1), false); Out << " ]";
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}
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} else if (I->getInstType() == Instruction::Ret && !Operand) {
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Out << " void";
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} else if (I->getInstType() == Instruction::Call) {
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writeOperand(Operand, true);
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Out << "(";
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Operand = I->getOperand(1);
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if (Operand) writeOperand(Operand, true);
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for (unsigned op = 2; (Operand = I->getOperand(op)); ++op) {
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Out << ",";
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writeOperand(Operand, true);
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}
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Out << " )";
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} else if (I->getInstType() == Instruction::Malloc ||
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I->getInstType() == Instruction::Alloca) {
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Out << " " << ((const PointerType*)((ConstPoolType*)Operand)
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->getValue())->getValueType();
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if ((Operand = I->getOperand(1))) {
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Out << ","; writeOperand(Operand, true);
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}
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} else if (Operand) { // Print the normal way...
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// PrintAllTypes - Instructions who have operands of all the same type
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// omit the type from all but the first operand. If the instruction has
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// different type operands (for example br), then they are all printed.
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bool PrintAllTypes = false;
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const Type *TheType = Operand->getType();
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unsigned i;
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for (i = 1; (Operand = I->getOperand(i)); i++) {
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if (Operand->getType() != TheType) {
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PrintAllTypes = true; // We have differing types! Print them all!
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break;
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}
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}
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if (!PrintAllTypes)
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Out << " " << I->getOperand(0)->getType();
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for (unsigned i = 0; (Operand = I->getOperand(i)); i++) {
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if (i) Out << ",";
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writeOperand(Operand, PrintAllTypes);
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}
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}
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// Print a little comment after the instruction indicating which slot it
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// occupies.
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//
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if (I->getType() != Type::VoidTy) {
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Out << "\t\t; <" << I->getType() << ">";
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if (!I->hasName()) {
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int Slot = Table.getValSlot(I); // Print out the def slot taken...
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if (Slot >= 0) Out << ":" << Slot;
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else Out << ":<badref>";
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}
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Out << "\t[#uses=" << I->use_size() << "]"; // Output # uses
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}
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Out << endl;
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return false;
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}
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void AssemblyWriter::writeOperand(const Value *Operand, bool PrintType,
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bool PrintName) {
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if (PrintType)
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Out << " " << Operand->getType();
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if (Operand->hasName() && PrintName) {
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Out << " %" << Operand->getName();
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} else {
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int Slot = Table.getValSlot(Operand);
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if (Operand->getValueType() == Value::ConstantVal) {
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Out << " " << ((ConstPoolVal*)Operand)->getStrValue();
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} else {
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if (Slot >= 0) Out << " %" << Slot;
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else if (PrintName)
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Out << "<badref>"; // Not embeded into a location?
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}
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}
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}
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//===----------------------------------------------------------------------===//
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// External Interface declarations
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//===----------------------------------------------------------------------===//
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void WriteToAssembly(const Module *M, ostream &o) {
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if (M == 0) { o << "<null> module\n"; return; }
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SlotCalculator SlotTable(M, true);
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AssemblyWriter W(o, SlotTable);
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W.write(M);
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}
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void WriteToAssembly(const Method *M, ostream &o) {
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if (M == 0) { o << "<null> method\n"; return; }
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SlotCalculator SlotTable(M->getParent(), true);
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AssemblyWriter W(o, SlotTable);
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W.write(M);
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}
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void WriteToAssembly(const BasicBlock *BB, ostream &o) {
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if (BB == 0) { o << "<null> basic block\n"; return; }
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SlotCalculator SlotTable(BB->getParent(), true);
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AssemblyWriter W(o, SlotTable);
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W.write(BB);
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}
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void WriteToAssembly(const ConstPoolVal *CPV, ostream &o) {
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if (CPV == 0) { o << "<null> constant pool value\n"; return; }
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SlotCalculator *SlotTable;
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// A Constant pool value may have a parent that is either a method or a
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// module. Untangle this now...
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//
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if (CPV->getParent() == 0 ||
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CPV->getParent()->getValueType() == Value::MethodVal) {
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SlotTable = new SlotCalculator((Method*)CPV->getParent(), true);
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} else {
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assert(CPV->getParent()->getValueType() == Value::ModuleVal);
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SlotTable = new SlotCalculator((Module*)CPV->getParent(), true);
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}
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AssemblyWriter W(o, *SlotTable);
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W.write(CPV);
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delete SlotTable;
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}
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void WriteToAssembly(const Instruction *I, ostream &o) {
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if (I == 0) { o << "<null> instruction\n"; return; }
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SlotCalculator SlotTable(I->getParent() ? I->getParent()->getParent() : 0,
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true);
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AssemblyWriter W(o, SlotTable);
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W.write(I);
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}
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