mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-19 19:29:31 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1062 91177308-0d34-0410-b5e6-96231b3b80d8
666 lines
22 KiB
C++
666 lines
22 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/iTerminators.h"
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#include "llvm/SymbolTable.h"
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#include "llvm/Support/STLExtras.h"
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#include "llvm/Support/StringExtras.h"
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#include <algorithm>
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#include <map>
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static const Module *getModuleFromVal(const Value *V) {
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if (const MethodArgument *MA =dyn_cast<const MethodArgument>(V))
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return MA->getParent() ? MA->getParent()->getParent() : 0;
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else if (const BasicBlock *BB = dyn_cast<const BasicBlock>(V))
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return BB->getParent() ? BB->getParent()->getParent() : 0;
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else if (const Instruction *I = dyn_cast<const Instruction>(V)) {
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const Method *M = I->getParent() ? I->getParent()->getParent() : 0;
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return M ? M->getParent() : 0;
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} else if (const GlobalValue *GV =dyn_cast<const GlobalValue>(V))
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return GV->getParent();
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else if (const Module *Mod = dyn_cast<const Module>(V))
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return Mod;
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return 0;
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}
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static SlotCalculator *createSlotCalculator(const Value *V) {
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assert(!isa<Type>(V) && "Can't create an SC for a type!");
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if (const MethodArgument *MA =dyn_cast<const MethodArgument>(V)){
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return new SlotCalculator(MA->getParent(), true);
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} else if (const Instruction *I = dyn_cast<const Instruction>(V)) {
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return new SlotCalculator(I->getParent()->getParent(), true);
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} else if (const BasicBlock *BB = dyn_cast<const BasicBlock>(V)) {
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return new SlotCalculator(BB->getParent(), true);
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} else if (const GlobalVariable *GV =dyn_cast<const GlobalVariable>(V)){
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return new SlotCalculator(GV->getParent(), true);
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} else if (const Method *Meth = dyn_cast<const Method>(V)) {
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return new SlotCalculator(Meth, true);
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} else if (const Module *Mod = dyn_cast<const Module>(V)) {
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return new SlotCalculator(Mod, true);
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}
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return 0;
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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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static void WriteAsOperandInternal(ostream &Out, const Value *V, bool PrintName,
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SlotCalculator *Table) {
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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 = dyn_cast<const ConstPoolVal>(V)) {
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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 = dyn_cast<const Type>(V)) {
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Out << " " << Ty->getDescription();
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return;
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}
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Table = createSlotCalculator(V);
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if (Table == 0) { Out << "BAD VALUE TYPE!"; return; }
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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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}
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// If the module has a symbol table, take all global types and stuff their
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// names into the TypeNames map.
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//
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static void fillTypeNameTable(const Module *M,
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map<const Type *, string> &TypeNames) {
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if (M && M->hasSymbolTable()) {
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const SymbolTable *ST = M->getSymbolTable();
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SymbolTable::const_iterator PI = ST->find(Type::TypeTy);
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if (PI != ST->end()) {
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SymbolTable::type_const_iterator I = PI->second.begin();
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for (; I != PI->second.end(); ++I) {
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// As a heuristic, don't insert pointer to primitive types, because
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// they are used too often to have a single useful name.
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//
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const Type *Ty = cast<const Type>(I->second);
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if (!isa<PointerType>(Ty) ||
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!cast<PointerType>(Ty)->getValueType()->isPrimitiveType())
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TypeNames.insert(make_pair(Ty, "%"+I->first));
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}
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}
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}
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}
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static string calcTypeName(const Type *Ty, vector<const Type *> &TypeStack,
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map<const Type *, string> &TypeNames) {
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if (Ty->isPrimitiveType()) return Ty->getDescription(); // Base case
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// Check to see if the type is named.
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map<const Type *, string>::iterator I = TypeNames.find(Ty);
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if (I != TypeNames.end()) return I->second;
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// Check to see if the Type is already on the stack...
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unsigned Slot = 0, CurSize = TypeStack.size();
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while (Slot < CurSize && TypeStack[Slot] != Ty) ++Slot; // Scan for type
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// This is another base case for the recursion. In this case, we know
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// that we have looped back to a type that we have previously visited.
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// Generate the appropriate upreference to handle this.
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//
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if (Slot < CurSize)
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return "\\" + utostr(CurSize-Slot); // Here's the upreference
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TypeStack.push_back(Ty); // Recursive case: Add us to the stack..
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string Result;
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switch (Ty->getPrimitiveID()) {
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case Type::MethodTyID: {
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const MethodType *MTy = cast<const MethodType>(Ty);
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Result = calcTypeName(MTy->getReturnType(), TypeStack, TypeNames) + " (";
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for (MethodType::ParamTypes::const_iterator
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I = MTy->getParamTypes().begin(),
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E = MTy->getParamTypes().end(); I != E; ++I) {
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if (I != MTy->getParamTypes().begin())
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Result += ", ";
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Result += calcTypeName(*I, TypeStack, TypeNames);
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}
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if (MTy->isVarArg()) {
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if (!MTy->getParamTypes().empty()) Result += ", ";
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Result += "...";
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}
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Result += ")";
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break;
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}
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case Type::StructTyID: {
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const StructType *STy = cast<const StructType>(Ty);
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Result = "{ ";
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for (StructType::ElementTypes::const_iterator
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I = STy->getElementTypes().begin(),
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E = STy->getElementTypes().end(); I != E; ++I) {
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if (I != STy->getElementTypes().begin())
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Result += ", ";
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Result += calcTypeName(*I, TypeStack, TypeNames);
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}
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Result += " }";
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break;
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}
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case Type::PointerTyID:
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Result = calcTypeName(cast<const PointerType>(Ty)->getValueType(),
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TypeStack, TypeNames) + " *";
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break;
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case Type::ArrayTyID: {
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const ArrayType *ATy = cast<const ArrayType>(Ty);
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int NumElements = ATy->getNumElements();
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Result = "[";
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if (NumElements != -1) Result += itostr(NumElements) + " x ";
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Result += calcTypeName(ATy->getElementType(), TypeStack, TypeNames) + "]";
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break;
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}
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default:
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assert(0 && "Unhandled case in getTypeProps!");
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Result = "<error>";
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}
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TypeStack.pop_back(); // Remove self from stack...
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return Result;
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}
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// printTypeInt - The internal guts of printing out a type that has a
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// potentially named portion.
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//
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static ostream &printTypeInt(ostream &Out, const Type *Ty,
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map<const Type *, string> &TypeNames) {
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// Primitive types always print out their description, regardless of whether
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// they have been named or not.
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//
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if (Ty->isPrimitiveType()) return Out << Ty->getDescription();
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// Check to see if the type is named.
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map<const Type *, string>::iterator I = TypeNames.find(Ty);
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if (I != TypeNames.end()) return Out << I->second;
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// Otherwise we have a type that has not been named but is a derived type.
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// Carefully recurse the type hierarchy to print out any contained symbolic
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// names.
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//
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vector<const Type *> TypeStack;
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string TypeName = calcTypeName(Ty, TypeStack, TypeNames);
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TypeNames.insert(make_pair(Ty, TypeName)); // Cache type name for later use
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return Out << TypeName;
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}
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// WriteTypeSymbolic - This attempts to write the specified type as a symbolic
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// type, iff there is an entry in the modules symbol table for the specified
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// type or one of it's component types. This is slower than a simple x << Type;
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//
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ostream &WriteTypeSymbolic(ostream &Out, const Type *Ty, const Module *M) {
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Out << " ";
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// If they want us to print out a type, attempt to make it symbolic if there
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// is a symbol table in the module...
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if (M && M->hasSymbolTable()) {
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map<const Type *, string> TypeNames;
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fillTypeNameTable(M, TypeNames);
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return printTypeInt(Out, Ty, TypeNames);
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} else {
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return Out << Ty->getDescription();
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}
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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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WriteTypeSymbolic(Out, V->getType(), getModuleFromVal(V));
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WriteAsOperandInternal(Out, V, PrintName, Table);
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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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const Module *TheModule;
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map<const Type *, string> TypeNames;
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public:
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inline AssemblyWriter(ostream &o, SlotCalculator &Tab, const Module *M)
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: Out(o), Table(Tab), TheModule(M) {
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// If the module has a symbol table, take all global types and stuff their
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// names into the TypeNames map.
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//
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fillTypeNameTable(M, TypeNames);
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}
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inline void write(const Module *M) { printModule(M); }
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inline void write(const GlobalVariable *G) { printGlobal(G); }
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inline void write(const Method *M) { printMethod(M); }
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inline void write(const BasicBlock *BB) { printBasicBlock(BB); }
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inline void write(const Instruction *I) { printInstruction(I); }
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inline void write(const ConstPoolVal *CPV) { printConstant(CPV); }
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private :
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void printModule(const Module *M);
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void printSymbolTable(const SymbolTable &ST);
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void printConstant(const ConstPoolVal *CPV);
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void printGlobal(const GlobalVariable *GV);
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void printMethod(const Method *M);
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void printMethodArgument(const MethodArgument *MA);
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void printBasicBlock(const BasicBlock *BB);
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void printInstruction(const Instruction *I);
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ostream &printType(const Type *Ty);
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void writeOperand(const Value *Op, bool PrintType, bool PrintName = true);
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// printInfoComment - Print a little comment after the instruction indicating
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// which slot it occupies.
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void printInfoComment(const Value *V);
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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) { Out << " "; printType(Operand->getType()); }
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WriteAsOperandInternal(Out, Operand, PrintName, &Table);
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}
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void AssemblyWriter::printModule(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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printSymbolTable(*M->getSymbolTable());
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for_each(M->gbegin(), M->gend(),
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bind_obj(this, &AssemblyWriter::printGlobal));
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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::printMethod));
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}
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void AssemblyWriter::printGlobal(const GlobalVariable *GV) {
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if (GV->hasName()) Out << "%" << GV->getName() << " = ";
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if (!GV->hasInitializer()) Out << "uninitialized ";
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Out << (GV->isConstant() ? "constant " : "global ");
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printType(GV->getType()->getValueType());
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if (GV->hasInitializer())
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writeOperand(GV->getInitializer(), false, false);
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printInfoComment(GV);
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Out << endl;
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}
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// printSymbolTable - 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::printSymbolTable(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 = dyn_cast<const ConstPoolVal>(V)) {
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printConstant(CPV);
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} else if (const Type *Ty = dyn_cast<const Type>(V)) {
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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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// printConstant - Print out a constant pool entry...
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//
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void AssemblyWriter::printConstant(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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printType(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; <";
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printType(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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// printMethod - Print all aspects of a method.
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//
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void AssemblyWriter::printMethod(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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printType(M->getReturnType()) << " \"" << M->getName() << "\"(";
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Table.incorporateMethod(M);
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// Loop over the arguments, printing them...
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const MethodType *MT = cast<const MethodType>(M->getMethodType());
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if (!M->isExternal()) {
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for_each(M->getArgumentList().begin(), M->getArgumentList().end(),
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bind_obj(this, &AssemblyWriter::printMethodArgument));
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} else {
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// Loop over the arguments, printing them...
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const MethodType *MT = cast<const MethodType>(M->getMethodType());
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for (MethodType::ParamTypes::const_iterator I = MT->getParamTypes().begin(),
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E = MT->getParamTypes().end(); I != E; ++I) {
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if (I != MT->getParamTypes().begin()) Out << ", ";
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printType(*I);
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}
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}
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// Finish printing arguments...
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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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printSymbolTable(*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::printBasicBlock));
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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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// printMethodArgument - 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::printMethodArgument(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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printType(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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// printBasicBlock - This member is called for each basic block in a methd.
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//
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void AssemblyWriter::printBasicBlock(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::printInstruction));
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}
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// printInfoComment - Print a little comment after the instruction indicating
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// which slot it occupies.
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//
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void AssemblyWriter::printInfoComment(const Value *V) {
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if (V->getType() != Type::VoidTy) {
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Out << "\t\t; <";
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printType(V->getType()) << ">";
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if (!V->hasName()) {
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int Slot = Table.getValSlot(V); // 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=" << V->use_size() << "]"; // Output # uses
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}
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}
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// printInstruction - This member is called for each Instruction in a methd.
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//
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void AssemblyWriter::printInstruction(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...
|
|
Out << I->getOpcodeName();
|
|
|
|
// Print out the type of the operands...
|
|
const Value *Operand = I->getNumOperands() ? I->getOperand(0) : 0;
|
|
|
|
// Special case conditional branches to swizzle the condition out to the front
|
|
if (I->getOpcode() == Instruction::Br && I->getNumOperands() > 1) {
|
|
writeOperand(I->getOperand(2), true);
|
|
Out << ",";
|
|
writeOperand(Operand, true);
|
|
Out << ",";
|
|
writeOperand(I->getOperand(1), true);
|
|
|
|
} else if (I->getOpcode() == Instruction::Switch) {
|
|
// Special case switch statement to get formatting nice and correct...
|
|
writeOperand(Operand , true); Out << ",";
|
|
writeOperand(I->getOperand(1), true); Out << " [";
|
|
|
|
for (unsigned op = 2, Eop = I->getNumOperands(); op < Eop; op += 2) {
|
|
Out << "\n\t\t";
|
|
writeOperand(I->getOperand(op ), true); Out << ",";
|
|
writeOperand(I->getOperand(op+1), true);
|
|
}
|
|
Out << "\n\t]";
|
|
} else if (isa<PHINode>(I)) {
|
|
Out << " ";
|
|
printType(Operand->getType());
|
|
|
|
Out << " ["; writeOperand(Operand, false); Out << ",";
|
|
writeOperand(I->getOperand(1), false); Out << " ]";
|
|
for (unsigned op = 2, Eop = I->getNumOperands(); op < Eop; op += 2) {
|
|
Out << ", [";
|
|
writeOperand(I->getOperand(op ), false); Out << ",";
|
|
writeOperand(I->getOperand(op+1), false); Out << " ]";
|
|
}
|
|
} else if (isa<ReturnInst>(I) && !Operand) {
|
|
Out << " void";
|
|
} else if (isa<CallInst>(I)) {
|
|
// TODO: Should try to print out short form of the Call instruction
|
|
writeOperand(Operand, true);
|
|
Out << "(";
|
|
if (I->getNumOperands() > 1) writeOperand(I->getOperand(1), true);
|
|
for (unsigned op = 2, Eop = I->getNumOperands(); op < Eop; ++op) {
|
|
Out << ",";
|
|
writeOperand(I->getOperand(op), true);
|
|
}
|
|
|
|
Out << " )";
|
|
} else if (const InvokeInst *II = dyn_cast<InvokeInst>(I)) {
|
|
// TODO: Should try to print out short form of the Invoke instruction
|
|
writeOperand(Operand, true);
|
|
Out << "(";
|
|
if (I->getNumOperands() > 3) writeOperand(I->getOperand(3), true);
|
|
for (unsigned op = 4, Eop = I->getNumOperands(); op < Eop; ++op) {
|
|
Out << ",";
|
|
writeOperand(I->getOperand(op), true);
|
|
}
|
|
|
|
Out << " )\n\t\t\tto";
|
|
writeOperand(II->getNormalDest(), true);
|
|
Out << " except";
|
|
writeOperand(II->getExceptionalDest(), true);
|
|
|
|
} else if (I->getOpcode() == Instruction::Malloc ||
|
|
I->getOpcode() == Instruction::Alloca) {
|
|
Out << " ";
|
|
printType(cast<const PointerType>(I->getType())->getValueType());
|
|
if (I->getNumOperands()) {
|
|
Out << ",";
|
|
writeOperand(I->getOperand(0), true);
|
|
}
|
|
} else if (isa<CastInst>(I)) {
|
|
writeOperand(Operand, true);
|
|
Out << " to ";
|
|
printType(I->getType());
|
|
} else if (Operand) { // Print the normal way...
|
|
|
|
// PrintAllTypes - Instructions who have operands of all the same type
|
|
// omit the type from all but the first operand. If the instruction has
|
|
// different type operands (for example br), then they are all printed.
|
|
bool PrintAllTypes = false;
|
|
const Type *TheType = Operand->getType();
|
|
|
|
for (unsigned i = 1, E = I->getNumOperands(); i != E; ++i) {
|
|
Operand = I->getOperand(i);
|
|
if (Operand->getType() != TheType) {
|
|
PrintAllTypes = true; // We have differing types! Print them all!
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Shift Left & Right print both types even for Ubyte LHS
|
|
if (isa<ShiftInst>(I)) PrintAllTypes = true;
|
|
|
|
if (!PrintAllTypes) {
|
|
Out << " ";
|
|
printType(I->getOperand(0)->getType());
|
|
}
|
|
|
|
for (unsigned i = 0, E = I->getNumOperands(); i != E; ++i) {
|
|
if (i) Out << ",";
|
|
writeOperand(I->getOperand(i), PrintAllTypes);
|
|
}
|
|
}
|
|
|
|
printInfoComment(I);
|
|
Out << endl;
|
|
}
|
|
|
|
|
|
// printType - Go to extreme measures to attempt to print out a short, symbolic
|
|
// version of a type name.
|
|
//
|
|
ostream &AssemblyWriter::printType(const Type *Ty) {
|
|
return printTypeInt(Out, Ty, TypeNames);
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// External Interface declarations
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
|
|
|
void WriteToAssembly(const Module *M, ostream &o) {
|
|
if (M == 0) { o << "<null> module\n"; return; }
|
|
SlotCalculator SlotTable(M, true);
|
|
AssemblyWriter W(o, SlotTable, M);
|
|
|
|
W.write(M);
|
|
}
|
|
|
|
void WriteToAssembly(const GlobalVariable *G, ostream &o) {
|
|
if (G == 0) { o << "<null> global variable\n"; return; }
|
|
SlotCalculator SlotTable(G->getParent(), true);
|
|
AssemblyWriter W(o, SlotTable, G->getParent());
|
|
W.write(G);
|
|
}
|
|
|
|
void WriteToAssembly(const Method *M, ostream &o) {
|
|
if (M == 0) { o << "<null> method\n"; return; }
|
|
SlotCalculator SlotTable(M->getParent(), true);
|
|
AssemblyWriter W(o, SlotTable, M->getParent());
|
|
|
|
W.write(M);
|
|
}
|
|
|
|
|
|
void WriteToAssembly(const BasicBlock *BB, ostream &o) {
|
|
if (BB == 0) { o << "<null> basic block\n"; return; }
|
|
|
|
SlotCalculator SlotTable(BB->getParent(), true);
|
|
AssemblyWriter W(o, SlotTable,
|
|
BB->getParent() ? BB->getParent()->getParent() : 0);
|
|
|
|
W.write(BB);
|
|
}
|
|
|
|
void WriteToAssembly(const ConstPoolVal *CPV, ostream &o) {
|
|
if (CPV == 0) { o << "<null> constant pool value\n"; return; }
|
|
o << " " << CPV->getType()->getDescription() << " " << CPV->getStrValue();
|
|
}
|
|
|
|
void WriteToAssembly(const Instruction *I, ostream &o) {
|
|
if (I == 0) { o << "<null> instruction\n"; return; }
|
|
|
|
const Method *M = I->getParent() ? I->getParent()->getParent() : 0;
|
|
SlotCalculator SlotTable(M, true);
|
|
AssemblyWriter W(o, SlotTable, M ? M->getParent() : 0);
|
|
|
|
W.write(I);
|
|
}
|