Initial revision
llvm-svn: 2
diff --git a/llvm/lib/VMCore/AsmWriter.cpp b/llvm/lib/VMCore/AsmWriter.cpp
new file mode 100644
index 0000000..e23403b
--- /dev/null
+++ b/llvm/lib/VMCore/AsmWriter.cpp
@@ -0,0 +1,328 @@
+//===-- Writer.cpp - Library for Printing VM assembly files ------*- C++ -*--=//
+//
+// This library implements the functionality defined in llvm/Assembly/Writer.h
+//
+// This library uses the Analysis library to figure out offsets for
+// variables in the method tables...
+//
+// TODO: print out the type name instead of the full type if a particular type
+// is in the symbol table...
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Assembly/Writer.h"
+#include "llvm/Analysis/SlotCalculator.h"
+#include "llvm/Module.h"
+#include "llvm/Method.h"
+#include "llvm/BasicBlock.h"
+#include "llvm/ConstPoolVals.h"
+#include "llvm/iOther.h"
+#include "llvm/iMemory.h"
+
+class AssemblyWriter : public ModuleAnalyzer {
+ ostream &Out;
+ SlotCalculator &Table;
+public:
+ inline AssemblyWriter(ostream &o, SlotCalculator &Tab) : Out(o), Table(Tab) {
+ }
+
+ inline void write(const Module *M) { processModule(M); }
+ inline void write(const Method *M) { processMethod(M); }
+ inline void write(const BasicBlock *BB) { processBasicBlock(BB); }
+ inline void write(const Instruction *I) { processInstruction(I); }
+ inline void write(const ConstPoolVal *CPV) { processConstant(CPV); }
+
+protected:
+ virtual bool visitMethod(const Method *M);
+ virtual bool processConstPool(const ConstantPool &CP, bool isMethod);
+ virtual bool processConstant(const ConstPoolVal *CPV);
+ virtual bool processMethod(const Method *M);
+ virtual bool processMethodArgument(const MethodArgument *MA);
+ virtual bool processBasicBlock(const BasicBlock *BB);
+ virtual bool processInstruction(const Instruction *I);
+
+private :
+ void writeOperand(const Value *Op, bool PrintType, bool PrintName = true);
+};
+
+
+
+// visitMethod - This member is called after the above two steps, visting each
+// method, because they are effectively values that go into the constant pool.
+//
+bool AssemblyWriter::visitMethod(const Method *M) {
+ return false;
+}
+
+bool AssemblyWriter::processConstPool(const ConstantPool &CP, bool isMethod) {
+ // Done printing arguments...
+ if (isMethod) Out << ")\n";
+
+ ModuleAnalyzer::processConstPool(CP, isMethod);
+
+ if (isMethod)
+ Out << "begin";
+ else
+ Out << "implementation\n";
+ return false;
+}
+
+
+// processConstant - Print out a constant pool entry...
+//
+bool AssemblyWriter::processConstant(const ConstPoolVal *CPV) {
+ Out << "\t";
+
+ // Print out name if it exists...
+ if (CPV->hasName())
+ Out << "%" << CPV->getName() << " = ";
+
+ // Print out the opcode...
+ Out << CPV->getType();
+
+ // Write the value out now...
+ writeOperand(CPV, false, false);
+
+ if (!CPV->hasName() && CPV->getType() != Type::VoidTy) {
+ int Slot = Table.getValSlot(CPV); // Print out the def slot taken...
+ Out << "\t\t; <" << CPV->getType() << ">:";
+ if (Slot >= 0) Out << Slot;
+ else Out << "<badref>";
+ }
+
+ Out << endl;
+ return false;
+}
+
+// processMethod - Process all aspects of a method.
+//
+bool AssemblyWriter::processMethod(const Method *M) {
+ // Print out the return type and name...
+ Out << "\n" << M->getReturnType() << " \"" << M->getName() << "\"(";
+ Table.incorporateMethod(M);
+ ModuleAnalyzer::processMethod(M);
+ Table.purgeMethod();
+ Out << "end\n";
+ return false;
+}
+
+// processMethodArgument - This member is called for every argument that
+// is passed into the method. Simply print it out
+//
+bool AssemblyWriter::processMethodArgument(const MethodArgument *Arg) {
+ // Insert commas as we go... the first arg doesn't get a comma
+ if (Arg != Arg->getParent()->getArgumentList().front()) Out << ", ";
+
+ // Output type...
+ Out << Arg->getType();
+
+ // Output name, if available...
+ if (Arg->hasName())
+ Out << " %" << Arg->getName();
+ else if (Table.getValSlot(Arg) < 0)
+ Out << "<badref>";
+
+ return false;
+}
+
+// processBasicBlock - This member is called for each basic block in a methd.
+//
+bool AssemblyWriter::processBasicBlock(const BasicBlock *BB) {
+ if (BB->hasName()) { // Print out the label if it exists...
+ Out << "\n" << BB->getName() << ":\n";
+ } else {
+ int Slot = Table.getValSlot(BB);
+ Out << "\t\t\t\t; <label>:";
+ if (Slot >= 0)
+ Out << Slot << endl; // Extra newline seperates out label's
+ else
+ Out << "<badref>\n";
+ }
+
+ ModuleAnalyzer::processBasicBlock(BB);
+ return false;
+}
+
+// processInstruction - This member is called for each Instruction in a methd.
+//
+bool AssemblyWriter::processInstruction(const Instruction *I) {
+ Out << "\t";
+
+ // Print out name if it exists...
+ if (I && I->hasName())
+ Out << "%" << I->getName() << " = ";
+
+ // Print out the opcode...
+ Out << I->getOpcode();
+
+ // Print out the type of the operands...
+ const Value *Operand = I->getOperand(0);
+
+ // Special case conditional branches to swizzle the condition out to the front
+ if (I->getInstType() == Instruction::Br && I->getOperand(1)) {
+ writeOperand(I->getOperand(2), true);
+ Out << ",";
+ writeOperand(Operand, true);
+ Out << ",";
+ writeOperand(I->getOperand(1), true);
+
+ } else if (I->getInstType() == 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; (Operand = I->getOperand(op)); op += 2) {
+ Out << "\n\t\t";
+ writeOperand(Operand, true); Out << ",";
+ writeOperand(I->getOperand(op+1), true);
+ }
+ Out << "\n\t]";
+
+ } else if (I->getInstType() == Instruction::Ret && !Operand) {
+ Out << " void";
+ } else if (I->getInstType() == Instruction::Call) {
+ writeOperand(Operand, true);
+ Out << "(";
+ Operand = I->getOperand(1);
+ if (Operand) writeOperand(Operand, true);
+ for (unsigned op = 2; (Operand = I->getOperand(op)); ++op) {
+ Out << ",";
+ writeOperand(Operand, true);
+ }
+
+ Out << " )";
+ } else if (I->getInstType() == Instruction::Malloc ||
+ I->getInstType() == Instruction::Alloca) {
+ Out << " " << ((const PointerType*)((ConstPoolType*)Operand)
+ ->getValue())->getValueType();
+ if ((Operand = I->getOperand(1))) {
+ Out << ","; writeOperand(Operand, true);
+ }
+
+ } 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();
+ unsigned i;
+
+ for (i = 1; (Operand = I->getOperand(i)); i++) {
+ if (Operand->getType() != TheType) {
+ PrintAllTypes = true; // We have differing types! Print them all!
+ break;
+ }
+ }
+
+ if (!PrintAllTypes)
+ Out << " " << I->getOperand(0)->getType();
+
+ for (unsigned i = 0; (Operand = I->getOperand(i)); i++) {
+ if (i) Out << ",";
+ writeOperand(Operand, PrintAllTypes);
+ }
+ }
+
+ // Print a little comment after the instruction indicating which slot it
+ // occupies.
+ //
+ if (!I->hasName() && I->getType() != Type::VoidTy) {
+ int Slot = Table.getValSlot(I); // Print out the def slot taken...
+ Out << "\t\t; <" << I->getType() << ">:";
+ if (Slot >= 0) Out << Slot;
+ else Out << "<badref>";
+
+ Out << "\t[#uses=" << I->use_size() << "]"; // Output # uses
+ }
+
+ Out << endl;
+
+ return false;
+}
+
+
+void AssemblyWriter::writeOperand(const Value *Operand, bool PrintType,
+ bool PrintName) {
+ if (PrintType)
+ Out << " " << Operand->getType();
+
+ if (Operand->hasName() && PrintName) {
+ Out << " %" << Operand->getName();
+ } else {
+ int Slot = Table.getValSlot(Operand);
+
+ if (Operand->getValueType() == Value::ConstantVal) {
+ Out << " " << ((ConstPoolVal*)Operand)->getStrValue();
+ } else {
+ if (Slot >= 0) Out << " %" << Slot;
+ else if (PrintName)
+ Out << "<badref>"; // Not embeded into a location?
+ }
+ }
+}
+
+
+//===----------------------------------------------------------------------===//
+// 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);
+
+ W.write(M);
+}
+
+void WriteToAssembly(const Method *M, ostream &o) {
+ if (M == 0) { o << "<null> method\n"; return; }
+ SlotCalculator SlotTable(M->getParent(), true);
+ AssemblyWriter W(o, SlotTable);
+
+ 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);
+
+ W.write(BB);
+}
+
+void WriteToAssembly(const ConstPoolVal *CPV, ostream &o) {
+ if (CPV == 0) { o << "<null> constant pool value\n"; return; }
+
+ SlotCalculator *SlotTable;
+
+ // A Constant pool value may have a parent that is either a method or a
+ // module. Untangle this now...
+ //
+ if (CPV->getParent() == 0 ||
+ CPV->getParent()->getValueType() == Value::MethodVal) {
+ SlotTable = new SlotCalculator((Method*)CPV->getParent(), true);
+ } else {
+ assert(CPV->getParent()->getValueType() == Value::ModuleVal);
+ SlotTable = new SlotCalculator((Module*)CPV->getParent(), true);
+ }
+
+ AssemblyWriter W(o, *SlotTable);
+ W.write(CPV);
+
+ delete SlotTable;
+}
+
+void WriteToAssembly(const Instruction *I, ostream &o) {
+ if (I == 0) { o << "<null> instruction\n"; return; }
+
+ SlotCalculator SlotTable(I->getParent() ? I->getParent()->getParent() : 0,
+ true);
+ AssemblyWriter W(o, SlotTable);
+
+ W.write(I);
+}