mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-19 03:29:22 +00:00
70cc3397f8
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@530 91177308-0d34-0410-b5e6-96231b3b80d8
406 lines
13 KiB
C++
406 lines
13 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/GlobalVariable.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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#include "llvm/Support/STLExtras.h"
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#include "llvm/SymbolTable.h"
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#include <algorithm>
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void DebugValue(const Value *V) {
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cerr << V << endl;
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}
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// WriteAsOperand - Write the name of the specified value out to the specified
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// ostream. This can be useful when you just want to print int %reg126, not the
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// whole instruction that generated it.
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//
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ostream &WriteAsOperand(ostream &Out, const Value *V, bool PrintType,
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bool PrintName, SlotCalculator *Table) {
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if (PrintType)
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Out << " " << V->getType();
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if (PrintName && V->hasName()) {
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Out << " %" << V->getName();
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} else {
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if (const ConstPoolVal *CPV = V->castConstant()) {
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Out << " " << CPV->getStrValue();
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} else {
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int Slot;
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if (Table) {
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Slot = Table->getValSlot(V);
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} else {
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if (const Type *Ty = V->castType()) {
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return Out << " " << Ty;
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} else if (const MethodArgument *MA = V->castMethodArgument()) {
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Table = new SlotCalculator(MA->getParent(), true);
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} else if (const Instruction *I = V->castInstruction()) {
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Table = new SlotCalculator(I->getParent()->getParent(), true);
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} else if (const BasicBlock *BB = V->castBasicBlock()) {
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Table = new SlotCalculator(BB->getParent(), true);
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} else if (const Method *Meth = V->castMethod()) {
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Table = new SlotCalculator(Meth, true);
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} else if (const Module *Mod = V->castModule()) {
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Table = new SlotCalculator(Mod, true);
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} else {
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return Out << "BAD VALUE TYPE!";
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}
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Slot = Table->getValSlot(V);
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delete Table;
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}
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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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return Out;
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}
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class AssemblyWriter {
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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 GlobalVariable *G) { processGlobal(G); }
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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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private :
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void processModule(const Module *M);
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void processSymbolTable(const SymbolTable &ST);
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void processConstant(const ConstPoolVal *CPV);
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void processGlobal(const GlobalVariable *GV);
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void processMethod(const Method *M);
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void processMethodArgument(const MethodArgument *MA);
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void processBasicBlock(const BasicBlock *BB);
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void processInstruction(const Instruction *I);
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void writeOperand(const Value *Op, bool PrintType, bool PrintName = true);
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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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WriteAsOperand(Out, Operand, PrintType, PrintName, &Table);
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}
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void AssemblyWriter::processModule(const Module *M) {
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// Loop over the symbol table, emitting all named constants...
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if (M->hasSymbolTable())
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processSymbolTable(*M->getSymbolTable());
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for_each(M->gbegin(), M->gend(),
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bind_obj(this, &AssemblyWriter::processGlobal));
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Out << "implementation\n";
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// Output all of the methods...
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for_each(M->begin(), M->end(), bind_obj(this,&AssemblyWriter::processMethod));
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}
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void AssemblyWriter::processGlobal(const GlobalVariable *GV) {
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Out << "global ";
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if (GV->hasName()) Out << "%" << GV->getName() << " = ";
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Out << GV->getType()->getDescription() << endl;
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}
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// processSymbolTable - Run through symbol table looking for named constants
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// if a named constant is found, emit it's declaration...
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//
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void AssemblyWriter::processSymbolTable(const SymbolTable &ST) {
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for (SymbolTable::const_iterator TI = ST.begin(); TI != ST.end(); ++TI) {
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SymbolTable::type_const_iterator I = ST.type_begin(TI->first);
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SymbolTable::type_const_iterator End = ST.type_end(TI->first);
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for (; I != End; ++I) {
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const Value *V = I->second;
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if (const ConstPoolVal *CPV = V->castConstant()) {
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processConstant(CPV);
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} else if (const Type *Ty = V->castType()) {
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Out << "\t%" << I->first << " = type " << Ty->getDescription() << endl;
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}
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}
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}
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}
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// processConstant - Print out a constant pool entry...
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//
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void AssemblyWriter::processConstant(const ConstPoolVal *CPV) {
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// Don't print out unnamed constants, they will be inlined
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if (!CPV->hasName()) return;
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// Print out name...
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Out << "\t%" << CPV->getName() << " = ";
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// Print out the constant type...
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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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}
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// processMethod - Process all aspects of a method.
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//
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void AssemblyWriter::processMethod(const Method *M) {
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// Print out the return type and name...
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Out << "\n" << (M->isExternal() ? "declare " : "")
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<< M->getReturnType() << " \"" << M->getName() << "\"(";
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Table.incorporateMethod(M);
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// Loop over the arguments, processing them...
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for_each(M->getArgumentList().begin(), M->getArgumentList().end(),
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bind_obj(this, &AssemblyWriter::processMethodArgument));
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// Finish printing arguments...
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const MethodType *MT = (const MethodType*)M->getType();
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if (MT->isVarArg()) {
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if (MT->getParamTypes().size()) Out << ", ";
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Out << "..."; // Output varargs portion of signature!
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}
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Out << ")\n";
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if (!M->isExternal()) {
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// Loop over the symbol table, emitting all named constants...
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if (M->hasSymbolTable())
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processSymbolTable(*M->getSymbolTable());
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Out << "begin";
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// Output all of its basic blocks... for the method
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for_each(M->begin(), M->end(),
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bind_obj(this, &AssemblyWriter::processBasicBlock));
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Out << "end\n";
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}
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Table.purgeMethod();
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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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void 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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}
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// processBasicBlock - This member is called for each basic block in a methd.
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//
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void 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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// Output all of the instructions in the basic block...
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for_each(BB->begin(), BB->end(),
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bind_obj(this, &AssemblyWriter::processInstruction));
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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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void 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->getOpcodeName();
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// Print out the type of the operands...
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const Value *Operand = I->getNumOperands() ? I->getOperand(0) : 0;
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// Special case conditional branches to swizzle the condition out to the front
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if (I->getOpcode() == Instruction::Br && I->getNumOperands() > 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->getOpcode() == 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, Eop = I->getNumOperands(); op < Eop; op += 2) {
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Out << "\n\t\t";
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writeOperand(I->getOperand(op ), 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->isPHINode()) {
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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, Eop = I->getNumOperands(); op < Eop; op += 2) {
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Out << ", [";
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writeOperand(I->getOperand(op ), false); Out << ",";
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writeOperand(I->getOperand(op+1), false); Out << " ]";
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}
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} else if (I->getOpcode() == Instruction::Ret && !Operand) {
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Out << " void";
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} else if (I->getOpcode() == Instruction::Call) {
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writeOperand(Operand, true);
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Out << "(";
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if (I->getNumOperands() > 1) writeOperand(I->getOperand(1), true);
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for (unsigned op = 2, Eop = I->getNumOperands(); op < Eop; ++op) {
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Out << ",";
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writeOperand(I->getOperand(op), true);
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}
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Out << " )";
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} else if (I->getOpcode() == Instruction::Malloc ||
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I->getOpcode() == Instruction::Alloca) {
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Out << " " << ((const PointerType*)I->getType())->getValueType();
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if (I->getNumOperands()) {
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Out << ",";
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writeOperand(I->getOperand(0), true);
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}
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} else if (I->getOpcode() == Instruction::Cast) {
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writeOperand(Operand, true);
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Out << " to " << I->getType();
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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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for (unsigned i = 1, E = I->getNumOperands(); i != E; ++i) {
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Operand = I->getOperand(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, E = I->getNumOperands(); i != E; ++i) {
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if (i) Out << ",";
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writeOperand(I->getOperand(i), 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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}
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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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WriteAsOperand(o, CPV, true, true, 0);
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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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