//===----------------------------------------------------------------------===//
#include "X86.h"
-#include <iostream>
+#include "X86InstrInfo.h"
+#include "llvm/Function.h"
+#include "llvm/Constant.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "Support/Statistic.h"
+#include "Support/hash_map"
+#include "llvm/Type.h"
+#include "llvm/Constants.h"
+#include "llvm/Assembly/Writer.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/SlotCalculator.h"
+#include "Support/StringExtras.h"
+#include "llvm/Module.h"
-/// X86PrintCode - Print out the specified machine code function to the
-/// specified stream. This function should work regardless of whether or not
-/// the function is in SSA form or not, although when in SSA form, we obviously
-/// don't care about being consumable by an assembler.
+namespace {
+ unsigned fnIndex;
+ std::set<const Value*> MangledGlobals;
+ struct Printer : public MachineFunctionPass {
+ std::ostream &O;
+ Printer(std::ostream &o) : O(o) {}
+ const TargetData *TD;
+ virtual const char *getPassName() const {
+ return "X86 Assembly Printer";
+ }
+
+ void printConstantPool(MachineConstantPool *MCP);
+ bool runOnMachineFunction(MachineFunction &F);
+ std::string ConstantExprToString(const ConstantExpr* CE);
+ std::string valToExprString(const Value* V);
+ bool doInitialization(Module &M);
+ bool doFinalization(Module &M);
+ void PrintZeroBytesToPad(int numBytes);
+ void printConstantValueOnly(const Constant* CV, int numPadBytesAfter = 0);
+ void printSingleConstantValue(const Constant* CV);
+ };
+ std::map<const Value *, unsigned> NumberForBB;
+}
+
+/// createX86CodePrinterPass - Print out the specified machine code function to
+/// the specified stream. This function should work regardless of whether or
+/// not the function is in SSA form or not.
///
-void X86PrintCode(const MachineFunction *MF, std::ostream &O) {
- O << "x86 printing not implemented yet!\n";
+Pass *createX86CodePrinterPass(std::ostream &O) {
+ return new Printer(O);
+}
+
+// We dont want identifier names with ., space, - in them.
+// So we replace them with _
+static std::string makeNameProper(std::string x) {
+ std::string tmp;
+ for (std::string::iterator sI = x.begin(), sEnd = x.end(); sI != sEnd; sI++)
+ switch (*sI) {
+ case '.': tmp += "d_"; break;
+ case ' ': tmp += "s_"; break;
+ case '-': tmp += "D_"; break;
+ default: tmp += *sI;
+ }
+
+ return tmp;
+}
+
+std::string getValueName(const Value *V) {
+ if (V->hasName()) { // Print out the label if it exists...
+
+ // Name mangling occurs as follows:
+ // - If V is not a global, mangling always occurs.
+ // - Otherwise, mangling occurs when any of the following are true:
+ // 1) V has internal linkage
+ // 2) V's name would collide if it is not mangled.
+ //
+
+ if(const GlobalValue* gv = dyn_cast<GlobalValue>(V)) {
+ if(!gv->hasInternalLinkage() && !MangledGlobals.count(gv)) {
+ // No internal linkage, name will not collide -> no mangling.
+ return makeNameProper(gv->getName());
+ }
+ }
+
+ // Non-global, or global with internal linkage / colliding name -> mangle.
+ return "l" + utostr(V->getType()->getUniqueID()) + "_" +
+ makeNameProper(V->getName());
+ }
+
+ static int Count = 0;
+ Count++;
+ return "ltmp_" + itostr(Count) + "_" + utostr(V->getType()->getUniqueID());
+}
+
+
+// valToExprString - Helper function for ConstantExprToString().
+// Appends result to argument string S.
+//
+std::string Printer::valToExprString(const Value* V) {
+ std::string S;
+ bool failed = false;
+ if (const Constant* CV = dyn_cast<Constant>(V)) { // symbolic or known
+ if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV))
+ S += std::string(CB == ConstantBool::True ? "1" : "0");
+ else if (const ConstantSInt *CI = dyn_cast<ConstantSInt>(CV))
+ S += itostr(CI->getValue());
+ else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
+ S += utostr(CI->getValue());
+ else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV))
+ S += ftostr(CFP->getValue());
+ else if (isa<ConstantPointerNull>(CV))
+ S += "0";
+ else if (const ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(CV))
+ S += valToExprString(CPR->getValue());
+ else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV))
+ S += ConstantExprToString(CE);
+ else
+ failed = true;
+ } else if (const GlobalValue* GV = dyn_cast<GlobalValue>(V)) {
+ S += getValueName(GV);
+ }
+ else
+ failed = true;
+
+ if (failed) {
+ assert(0 && "Cannot convert value to string");
+ S += "<illegal-value>";
+ }
+ return S;
+}
+
+// ConstantExprToString() - Convert a ConstantExpr to an asm expression
+// and return this as a string.
+std::string Printer::ConstantExprToString(const ConstantExpr* CE) {
+ std::string S;
+ switch(CE->getOpcode()) {
+ case Instruction::GetElementPtr:
+ { // generate a symbolic expression for the byte address
+ const Value* ptrVal = CE->getOperand(0);
+ std::vector<Value*> idxVec(CE->op_begin()+1, CE->op_end());
+ S += "(" + valToExprString(ptrVal) + ") + ("
+ + utostr(TD->getIndexedOffset(ptrVal->getType(),idxVec)) + ")";
+ break;
+ }
+
+ case Instruction::Cast:
+ // Support only non-converting casts for now, i.e., a no-op.
+ // This assertion is not a complete check.
+ assert(TD->getTypeSize(CE->getType()) ==
+ TD->getTypeSize(CE->getOperand(0)->getType()));
+ S += "(" + valToExprString(CE->getOperand(0)) + ")";
+ break;
+
+ case Instruction::Add:
+ S += "(" + valToExprString(CE->getOperand(0)) + ") + ("
+ + valToExprString(CE->getOperand(1)) + ")";
+ break;
+
+ default:
+ assert(0 && "Unsupported operator in ConstantExprToString()");
+ break;
+ }
+
+ return S;
+}
+
+// Print a single constant value.
+void
+Printer::printSingleConstantValue(const Constant* CV)
+{
+ assert(CV->getType() != Type::VoidTy &&
+ CV->getType() != Type::TypeTy &&
+ CV->getType() != Type::LabelTy &&
+ "Unexpected type for Constant");
+
+ assert((!isa<ConstantArray>(CV) && ! isa<ConstantStruct>(CV))
+ && "Aggregate types should be handled outside this function");
+
+ const Type *type = CV->getType();
+ O << "\t";
+ switch(type->getPrimitiveID())
+ {
+ case Type::BoolTyID: case Type::UByteTyID: case Type::SByteTyID:
+ O << ".byte";
+ break;
+ case Type::UShortTyID: case Type::ShortTyID:
+ O << ".word";
+ break;
+ case Type::UIntTyID: case Type::IntTyID: case Type::PointerTyID:
+ O << ".long";
+ break;
+ case Type::ULongTyID: case Type::LongTyID:
+ O << ".quad";
+ break;
+ case Type::FloatTyID:
+ O << ".long";
+ break;
+ case Type::DoubleTyID:
+ O << ".quad";
+ break;
+ case Type::ArrayTyID:
+ if ((cast<ArrayType>(type)->getElementType() == Type::UByteTy) ||
+ (cast<ArrayType>(type)->getElementType() == Type::SByteTy))
+ O << ".string";
+ else
+ assert (0 && "Can't handle printing this type of array");
+ break;
+ default:
+ assert (0 && "Can't handle printing this type of thing");
+ break;
+ }
+ O << "\t";
+
+ if (type->isPrimitiveType())
+ {
+ if (type->isFloatingPoint()) {
+ // FP Constants are printed as integer constants to avoid losing
+ // precision...
+ double Val = cast<ConstantFP>(CV)->getValue();
+ if (type == Type::FloatTy) {
+ float FVal = (float)Val;
+ char *ProxyPtr = (char*)&FVal; // Abide by C TBAA rules
+ O << *(unsigned int*)ProxyPtr;
+ } else if (type == Type::DoubleTy) {
+ char *ProxyPtr = (char*)&Val; // Abide by C TBAA rules
+ O << *(uint64_t*)ProxyPtr;
+ } else {
+ assert(0 && "Unknown floating point type!");
+ }
+
+ O << "\t# " << type->getDescription() << " value: " << Val << "\n";
+ } else {
+ WriteAsOperand(O, CV, false, false) << "\n";
+ }
+ }
+ else if (const ConstantPointerRef* CPR = dyn_cast<ConstantPointerRef>(CV))
+ {
+ // This is a constant address for a global variable or method.
+ // Use the name of the variable or method as the address value.
+ O << getValueName(CPR->getValue()) << "\n";
+ }
+ else if (isa<ConstantPointerNull>(CV))
+ {
+ // Null pointer value
+ O << "0\n";
+ }
+ else if (const ConstantExpr* CE = dyn_cast<ConstantExpr>(CV))
+ {
+ // Constant expression built from operators, constants, and
+ // symbolic addrs
+ O << ConstantExprToString(CE) << "\n";
+ }
+ else
+ {
+ assert(0 && "Unknown elementary type for constant");
+ }
+}
+
+// Can we treat the specified array as a string? Only if it is an array of
+// ubytes or non-negative sbytes.
+//
+static bool isStringCompatible(const ConstantArray *CVA) {
+ const Type *ETy = cast<ArrayType>(CVA->getType())->getElementType();
+ if (ETy == Type::UByteTy) return true;
+ if (ETy != Type::SByteTy) return false;
+
+ for (unsigned i = 0; i < CVA->getNumOperands(); ++i)
+ if (cast<ConstantSInt>(CVA->getOperand(i))->getValue() < 0)
+ return false;
+
+ return true;
+}
+
+// toOctal - Convert the low order bits of X into an octal letter
+static inline char toOctal(int X) {
+ return (X&7)+'0';
+}
+
+// getAsCString - Return the specified array as a C compatible string, only if
+// the predicate isStringCompatible is true.
+//
+static std::string getAsCString(const ConstantArray *CVA) {
+ assert(isStringCompatible(CVA) && "Array is not string compatible!");
+
+ std::string Result;
+ const Type *ETy = cast<ArrayType>(CVA->getType())->getElementType();
+ Result = "\"";
+ for (unsigned i = 0; i < CVA->getNumOperands(); ++i) {
+ unsigned char C = (ETy == Type::SByteTy) ?
+ (unsigned char)cast<ConstantSInt>(CVA->getOperand(i))->getValue() :
+ (unsigned char)cast<ConstantUInt>(CVA->getOperand(i))->getValue();
+
+ if (C == '"') {
+ Result += "\\\"";
+ } else if (C == '\\') {
+ Result += "\\\\";
+ } else if (isprint(C)) {
+ Result += C;
+ } else {
+ switch(C) {
+ case '\a': Result += "\\a"; break;
+ case '\b': Result += "\\b"; break;
+ case '\f': Result += "\\f"; break;
+ case '\n': Result += "\\n"; break;
+ case '\r': Result += "\\r"; break;
+ case '\t': Result += "\\t"; break;
+ case '\v': Result += "\\v"; break;
+ default:
+ Result += '\\';
+ Result += toOctal(C >> 6);
+ Result += toOctal(C >> 3);
+ Result += toOctal(C >> 0);
+ break;
+ }
+ }
+ }
+ Result += "\"";
+ return Result;
+}
+
+// Print a constant value or values (it may be an aggregate).
+// Uses printSingleConstantValue() to print each individual value.
+void
+Printer::printConstantValueOnly(const Constant* CV,
+ int numPadBytesAfter /* = 0 */)
+{
+ const ConstantArray *CVA = dyn_cast<ConstantArray>(CV);
+
+ if (CVA && isStringCompatible(CVA))
+ { // print the string alone and return
+ O << "\t" << ".string" << "\t" << getAsCString(CVA) << "\n";
+ }
+ else if (CVA)
+ { // Not a string. Print the values in successive locations
+ const std::vector<Use> &constValues = CVA->getValues();
+ for (unsigned i=0; i < constValues.size(); i++)
+ printConstantValueOnly(cast<Constant>(constValues[i].get()));
+ }
+ else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV))
+ { // Print the fields in successive locations. Pad to align if needed!
+ const StructLayout *cvsLayout =
+ TD->getStructLayout(CVS->getType());
+ const std::vector<Use>& constValues = CVS->getValues();
+ unsigned sizeSoFar = 0;
+ for (unsigned i=0, N = constValues.size(); i < N; i++)
+ {
+ const Constant* field = cast<Constant>(constValues[i].get());
+
+ // Check if padding is needed and insert one or more 0s.
+ unsigned fieldSize = TD->getTypeSize(field->getType());
+ int padSize = ((i == N-1? cvsLayout->StructSize
+ : cvsLayout->MemberOffsets[i+1])
+ - cvsLayout->MemberOffsets[i]) - fieldSize;
+ sizeSoFar += (fieldSize + padSize);
+
+ // Now print the actual field value
+ printConstantValueOnly(field, padSize);
+ }
+ assert(sizeSoFar == cvsLayout->StructSize &&
+ "Layout of constant struct may be incorrect!");
+ }
+ else
+ printSingleConstantValue(CV);
+
+ if (numPadBytesAfter) {
+ unsigned numBytes = numPadBytesAfter;
+ for ( ; numBytes >= 8; numBytes -= 8)
+ printSingleConstantValue(Constant::getNullValue(Type::ULongTy));
+ if (numBytes >= 4)
+ {
+ printSingleConstantValue(Constant::getNullValue(Type::UIntTy));
+ numBytes -= 4;
+ }
+ while (numBytes--)
+ printSingleConstantValue(Constant::getNullValue(Type::UByteTy));
+ }
+}
+
+// printConstantPool - Print out any constants which have been spilled to
+// memory...
+void Printer::printConstantPool(MachineConstantPool *MCP){
+ const std::vector<Constant*> &CP = MCP->getConstants();
+ if (CP.empty()) return;
+
+ for (unsigned i = 0, e = CP.size(); i != e; ++i) {
+ O << "\t.section .rodata\n";
+ O << "\t.align " << (unsigned)TD->getTypeAlignment(CP[i]->getType())
+ << "\n";
+ O << ".CPI" << fnIndex << "_" << i << ":\t\t\t\t\t#" << *CP[i] << "\n";
+ printConstantValueOnly (CP[i]);
+ }
+}
+
+/// runOnMachineFunction - This uses the X86InstructionInfo::print method
+/// to print assembly for each instruction.
+bool Printer::runOnMachineFunction(MachineFunction &MF) {
+ static unsigned BBNumber = 0;
+ const TargetMachine &TM = MF.getTarget();
+ const TargetInstrInfo &TII = TM.getInstrInfo();
+ TD = &TM.getTargetData();
+
+ // Print out constants referenced by the function
+ printConstantPool(MF.getConstantPool());
+
+ // Print out labels for the function.
+ O << "\t.text\n";
+ O << "\t.align 16\n";
+ O << "\t.globl\t" << getValueName(MF.getFunction()) << "\n";
+ O << "\t.type\t" << getValueName(MF.getFunction()) << ", @function\n";
+ O << getValueName(MF.getFunction()) << ":\n";
+
+ NumberForBB.clear();
+ for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
+ I != E; ++I) {
+ NumberForBB[I->getBasicBlock()] = BBNumber++;
+ }
+
+ // Print out code for the function.
+ for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
+ I != E; ++I) {
+ // Print a label for the basic block.
+ O << ".BB" << NumberForBB[I->getBasicBlock()] << ":\t# "
+ << I->getBasicBlock()->getName() << "\n";
+ for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
+ II != E; ++II) {
+ // Print the assembly for the instruction.
+ O << "\t";
+ TII.print(*II, O, TM);
+ }
+ }
+
+ fnIndex++;
+ // We didn't modify anything.
+ return false;
+}
+
+static bool isScale(const MachineOperand &MO) {
+ return MO.isImmediate() &&
+ (MO.getImmedValue() == 1 || MO.getImmedValue() == 2 ||
+ MO.getImmedValue() == 4 || MO.getImmedValue() == 8);
+}
+
+static bool isMem(const MachineInstr *MI, unsigned Op) {
+ if (MI->getOperand(Op).isFrameIndex()) return true;
+ if (MI->getOperand(Op).isConstantPoolIndex()) return true;
+ return Op+4 <= MI->getNumOperands() &&
+ MI->getOperand(Op ).isRegister() &&isScale(MI->getOperand(Op+1)) &&
+ MI->getOperand(Op+2).isRegister() &&MI->getOperand(Op+3).isImmediate();
+}
+
+static void printOp(std::ostream &O, const MachineOperand &MO,
+ const MRegisterInfo &RI, bool elideOffsetKeyword = false) {
+ switch (MO.getType()) {
+ case MachineOperand::MO_VirtualRegister:
+ if (Value *V = MO.getVRegValueOrNull()) {
+ O << "<" << V->getName() << ">";
+ return;
+ }
+ // FALLTHROUGH
+ case MachineOperand::MO_MachineRegister:
+ if (MO.getReg() < MRegisterInfo::FirstVirtualRegister)
+ O << RI.get(MO.getReg()).Name;
+ else
+ O << "%reg" << MO.getReg();
+ return;
+
+ case MachineOperand::MO_SignExtendedImmed:
+ case MachineOperand::MO_UnextendedImmed:
+ O << (int)MO.getImmedValue();
+ return;
+ case MachineOperand::MO_PCRelativeDisp:
+ O << ".BB" << NumberForBB[MO.getVRegValue()] << " # PC rel: "
+ << MO.getVRegValue()->getName();
+ return;
+ case MachineOperand::MO_GlobalAddress:
+ if (!elideOffsetKeyword) O << "OFFSET "; O << getValueName(MO.getGlobal());
+ return;
+ case MachineOperand::MO_ExternalSymbol:
+ O << MO.getSymbolName();
+ return;
+ default:
+ O << "<unknown operand type>"; return;
+ }
+}
+
+static const std::string sizePtr(const TargetInstrDescriptor &Desc) {
+ switch (Desc.TSFlags & X86II::ArgMask) {
+ default: assert(0 && "Unknown arg size!");
+ case X86II::Arg8: return "BYTE PTR";
+ case X86II::Arg16: return "WORD PTR";
+ case X86II::Arg32: return "DWORD PTR";
+ case X86II::Arg64: return "QWORD PTR";
+ case X86II::ArgF32: return "DWORD PTR";
+ case X86II::ArgF64: return "QWORD PTR";
+ case X86II::ArgF80: return "XWORD PTR";
+ }
+}
+
+static void printMemReference(std::ostream &O, const MachineInstr *MI,
+ unsigned Op, const MRegisterInfo &RI) {
+ assert(isMem(MI, Op) && "Invalid memory reference!");
+
+ if (MI->getOperand(Op).isFrameIndex()) {
+ O << "[frame slot #" << MI->getOperand(Op).getFrameIndex();
+ if (MI->getOperand(Op+3).getImmedValue())
+ O << " + " << MI->getOperand(Op+3).getImmedValue();
+ O << "]";
+ return;
+ } else if (MI->getOperand(Op).isConstantPoolIndex()) {
+ O << "[.CPI" << fnIndex << "_"
+ << MI->getOperand(Op).getConstantPoolIndex();
+ if (MI->getOperand(Op+3).getImmedValue())
+ O << " + " << MI->getOperand(Op+3).getImmedValue();
+ O << "]";
+ return;
+ }
+
+ const MachineOperand &BaseReg = MI->getOperand(Op);
+ int ScaleVal = MI->getOperand(Op+1).getImmedValue();
+ const MachineOperand &IndexReg = MI->getOperand(Op+2);
+ int DispVal = MI->getOperand(Op+3).getImmedValue();
+
+ O << "[";
+ bool NeedPlus = false;
+ if (BaseReg.getReg()) {
+ printOp(O, BaseReg, RI);
+ NeedPlus = true;
+ }
+
+ if (IndexReg.getReg()) {
+ if (NeedPlus) O << " + ";
+ if (ScaleVal != 1)
+ O << ScaleVal << "*";
+ printOp(O, IndexReg, RI);
+ NeedPlus = true;
+ }
+
+ if (DispVal) {
+ if (NeedPlus)
+ if (DispVal > 0)
+ O << " + ";
+ else {
+ O << " - ";
+ DispVal = -DispVal;
+ }
+ O << DispVal;
+ }
+ O << "]";
+}
+
+// print - Print out an x86 instruction in intel syntax
+void X86InstrInfo::print(const MachineInstr *MI, std::ostream &O,
+ const TargetMachine &TM) const {
+ unsigned Opcode = MI->getOpcode();
+ const TargetInstrDescriptor &Desc = get(Opcode);
+
+ switch (Desc.TSFlags & X86II::FormMask) {
+ case X86II::Pseudo:
+ // Print pseudo-instructions as comments; either they should have been
+ // turned into real instructions by now, or they don't need to be
+ // seen by the assembler (e.g., IMPLICIT_USEs.)
+ O << "# ";
+ if (Opcode == X86::PHI) {
+ printOp(O, MI->getOperand(0), RI);
+ O << " = phi ";
+ for (unsigned i = 1, e = MI->getNumOperands(); i != e; i+=2) {
+ if (i != 1) O << ", ";
+ O << "[";
+ printOp(O, MI->getOperand(i), RI);
+ O << ", ";
+ printOp(O, MI->getOperand(i+1), RI);
+ O << "]";
+ }
+ } else {
+ unsigned i = 0;
+ if (MI->getNumOperands() && (MI->getOperand(0).opIsDefOnly() ||
+ MI->getOperand(0).opIsDefAndUse())) {
+ printOp(O, MI->getOperand(0), RI);
+ O << " = ";
+ ++i;
+ }
+ O << getName(MI->getOpcode());
+
+ for (unsigned e = MI->getNumOperands(); i != e; ++i) {
+ O << " ";
+ if (MI->getOperand(i).opIsDefOnly() ||
+ MI->getOperand(i).opIsDefAndUse()) O << "*";
+ printOp(O, MI->getOperand(i), RI);
+ if (MI->getOperand(i).opIsDefOnly() ||
+ MI->getOperand(i).opIsDefAndUse()) O << "*";
+ }
+ }
+ O << "\n";
+ return;
+
+ case X86II::RawFrm:
+ // The accepted forms of Raw instructions are:
+ // 1. nop - No operand required
+ // 2. jmp foo - PC relative displacement operand
+ // 3. call bar - GlobalAddress Operand or External Symbol Operand
+ //
+ assert(MI->getNumOperands() == 0 ||
+ (MI->getNumOperands() == 1 &&
+ (MI->getOperand(0).isPCRelativeDisp() ||
+ MI->getOperand(0).isGlobalAddress() ||
+ MI->getOperand(0).isExternalSymbol())) &&
+ "Illegal raw instruction!");
+ O << getName(MI->getOpcode()) << " ";
+
+ if (MI->getNumOperands() == 1) {
+ printOp(O, MI->getOperand(0), RI, true); // Don't print "OFFSET"...
+ }
+ O << "\n";
+ return;
+
+ case X86II::AddRegFrm: {
+ // There are currently two forms of acceptable AddRegFrm instructions.
+ // Either the instruction JUST takes a single register (like inc, dec, etc),
+ // or it takes a register and an immediate of the same size as the register
+ // (move immediate f.e.). Note that this immediate value might be stored as
+ // an LLVM value, to represent, for example, loading the address of a global
+ // into a register. The initial register might be duplicated if this is a
+ // M_2_ADDR_REG instruction
+ //
+ assert(MI->getOperand(0).isRegister() &&
+ (MI->getNumOperands() == 1 ||
+ (MI->getNumOperands() == 2 &&
+ (MI->getOperand(1).getVRegValueOrNull() ||
+ MI->getOperand(1).isImmediate() ||
+ MI->getOperand(1).isRegister() ||
+ MI->getOperand(1).isGlobalAddress() ||
+ MI->getOperand(1).isExternalSymbol()))) &&
+ "Illegal form for AddRegFrm instruction!");
+
+ unsigned Reg = MI->getOperand(0).getReg();
+
+ O << getName(MI->getOpCode()) << " ";
+ printOp(O, MI->getOperand(0), RI);
+ if (MI->getNumOperands() == 2 &&
+ (!MI->getOperand(1).isRegister() ||
+ MI->getOperand(1).getVRegValueOrNull() ||
+ MI->getOperand(1).isGlobalAddress() ||
+ MI->getOperand(1).isExternalSymbol())) {
+ O << ", ";
+ printOp(O, MI->getOperand(1), RI);
+ }
+ O << "\n";
+ return;
+ }
+ case X86II::MRMDestReg: {
+ // There are two acceptable forms of MRMDestReg instructions, those with 2,
+ // 3 and 4 operands:
+ //
+ // 2 Operands: this is for things like mov that do not read a second input
+ //
+ // 3 Operands: in this form, the first two registers (the destination, and
+ // the first operand) should be the same, post register allocation. The 3rd
+ // operand is an additional input. This should be for things like add
+ // instructions.
+ //
+ // 4 Operands: This form is for instructions which are 3 operands forms, but
+ // have a constant argument as well.
+ //
+ bool isTwoAddr = isTwoAddrInstr(Opcode);
+ assert(MI->getOperand(0).isRegister() &&
+ (MI->getNumOperands() == 2 ||
+ (isTwoAddr && MI->getOperand(1).isRegister() &&
+ MI->getOperand(0).getReg() == MI->getOperand(1).getReg() &&
+ (MI->getNumOperands() == 3 ||
+ (MI->getNumOperands() == 4 && MI->getOperand(3).isImmediate()))))
+ && "Bad format for MRMDestReg!");
+
+ O << getName(MI->getOpCode()) << " ";
+ printOp(O, MI->getOperand(0), RI);
+ O << ", ";
+ printOp(O, MI->getOperand(1+isTwoAddr), RI);
+ if (MI->getNumOperands() == 4) {
+ O << ", ";
+ printOp(O, MI->getOperand(3), RI);
+ }
+ O << "\n";
+ return;
+ }
+
+ case X86II::MRMDestMem: {
+ // These instructions are the same as MRMDestReg, but instead of having a
+ // register reference for the mod/rm field, it's a memory reference.
+ //
+ assert(isMem(MI, 0) && MI->getNumOperands() == 4+1 &&
+ MI->getOperand(4).isRegister() && "Bad format for MRMDestMem!");
+
+ O << getName(MI->getOpCode()) << " " << sizePtr(Desc) << " ";
+ printMemReference(O, MI, 0, RI);
+ O << ", ";
+ printOp(O, MI->getOperand(4), RI);
+ O << "\n";
+ return;
+ }
+
+ case X86II::MRMSrcReg: {
+ // There is a two forms that are acceptable for MRMSrcReg instructions,
+ // those with 3 and 2 operands:
+ //
+ // 3 Operands: in this form, the last register (the second input) is the
+ // ModR/M input. The first two operands should be the same, post register
+ // allocation. This is for things like: add r32, r/m32
+ //
+ // 2 Operands: this is for things like mov that do not read a second input
+ //
+ assert(MI->getOperand(0).isRegister() &&
+ MI->getOperand(1).isRegister() &&
+ (MI->getNumOperands() == 2 ||
+ (MI->getNumOperands() == 3 && MI->getOperand(2).isRegister()))
+ && "Bad format for MRMSrcReg!");
+ if (MI->getNumOperands() == 3 &&
+ MI->getOperand(0).getReg() != MI->getOperand(1).getReg())
+ O << "**";
+
+ O << getName(MI->getOpCode()) << " ";
+ printOp(O, MI->getOperand(0), RI);
+ O << ", ";
+ printOp(O, MI->getOperand(MI->getNumOperands()-1), RI);
+ O << "\n";
+ return;
+ }
+
+ case X86II::MRMSrcMem: {
+ // These instructions are the same as MRMSrcReg, but instead of having a
+ // register reference for the mod/rm field, it's a memory reference.
+ //
+ assert(MI->getOperand(0).isRegister() &&
+ (MI->getNumOperands() == 1+4 && isMem(MI, 1)) ||
+ (MI->getNumOperands() == 2+4 && MI->getOperand(1).isRegister() &&
+ isMem(MI, 2))
+ && "Bad format for MRMDestReg!");
+ if (MI->getNumOperands() == 2+4 &&
+ MI->getOperand(0).getReg() != MI->getOperand(1).getReg())
+ O << "**";
+
+ O << getName(MI->getOpCode()) << " ";
+ printOp(O, MI->getOperand(0), RI);
+ O << ", " << sizePtr(Desc) << " ";
+ printMemReference(O, MI, MI->getNumOperands()-4, RI);
+ O << "\n";
+ return;
+ }
+
+ case X86II::MRMS0r: case X86II::MRMS1r:
+ case X86II::MRMS2r: case X86II::MRMS3r:
+ case X86II::MRMS4r: case X86II::MRMS5r:
+ case X86II::MRMS6r: case X86II::MRMS7r: {
+ // In this form, the following are valid formats:
+ // 1. sete r
+ // 2. cmp reg, immediate
+ // 2. shl rdest, rinput <implicit CL or 1>
+ // 3. sbb rdest, rinput, immediate [rdest = rinput]
+ //
+ assert(MI->getNumOperands() > 0 && MI->getNumOperands() < 4 &&
+ MI->getOperand(0).isRegister() && "Bad MRMSxR format!");
+ assert((MI->getNumOperands() != 2 ||
+ MI->getOperand(1).isRegister() || MI->getOperand(1).isImmediate())&&
+ "Bad MRMSxR format!");
+ assert((MI->getNumOperands() < 3 ||
+ (MI->getOperand(1).isRegister() && MI->getOperand(2).isImmediate())) &&
+ "Bad MRMSxR format!");
+
+ if (MI->getNumOperands() > 1 && MI->getOperand(1).isRegister() &&
+ MI->getOperand(0).getReg() != MI->getOperand(1).getReg())
+ O << "**";
+
+ O << getName(MI->getOpCode()) << " ";
+ printOp(O, MI->getOperand(0), RI);
+ if (MI->getOperand(MI->getNumOperands()-1).isImmediate()) {
+ O << ", ";
+ printOp(O, MI->getOperand(MI->getNumOperands()-1), RI);
+ }
+ O << "\n";
+
+ return;
+ }
+
+ case X86II::MRMS0m: case X86II::MRMS1m:
+ case X86II::MRMS2m: case X86II::MRMS3m:
+ case X86II::MRMS4m: case X86II::MRMS5m:
+ case X86II::MRMS6m: case X86II::MRMS7m: {
+ // In this form, the following are valid formats:
+ // 1. sete [m]
+ // 2. cmp [m], immediate
+ // 2. shl [m], rinput <implicit CL or 1>
+ // 3. sbb [m], immediate
+ //
+ assert(MI->getNumOperands() >= 4 && MI->getNumOperands() <= 5 &&
+ isMem(MI, 0) && "Bad MRMSxM format!");
+ assert((MI->getNumOperands() != 5 || MI->getOperand(4).isImmediate()) &&
+ "Bad MRMSxM format!");
+
+ O << getName(MI->getOpCode()) << " ";
+ O << sizePtr(Desc) << " ";
+ printMemReference(O, MI, 0, RI);
+ if (MI->getNumOperands() == 5) {
+ O << ", ";
+ printOp(O, MI->getOperand(4), RI);
+ }
+ O << "\n";
+ return;
+ }
+
+ default:
+ O << "\tUNKNOWN FORM:\t\t-"; MI->print(O, TM); break;
+ }
+}
+
+bool Printer::doInitialization(Module &M)
+{
+ // Tell gas we are outputting Intel syntax (not AT&T syntax) assembly,
+ // with no % decorations on register names.
+ O << "\t.intel_syntax noprefix\n";
+
+ // Start function index at 0
+ fnIndex = 0;
+
+ // Ripped from CWriter:
+ // Calculate which global values have names that will collide when we throw
+ // away type information.
+ { // Scope to delete the FoundNames set when we are done with it...
+ std::set<std::string> FoundNames;
+ for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
+ if (I->hasName()) // If the global has a name...
+ if (FoundNames.count(I->getName())) // And the name is already used
+ MangledGlobals.insert(I); // Mangle the name
+ else
+ FoundNames.insert(I->getName()); // Otherwise, keep track of name
+
+ for (Module::giterator I = M.gbegin(), E = M.gend(); I != E; ++I)
+ if (I->hasName()) // If the global has a name...
+ if (FoundNames.count(I->getName())) // And the name is already used
+ MangledGlobals.insert(I); // Mangle the name
+ else
+ FoundNames.insert(I->getName()); // Otherwise, keep track of name
+ }
+
+ return false; // success
+}
- // This should use the X86InstructionInfo::print method to print assembly for
- // each instruction
+bool Printer::doFinalization(Module &M)
+{
+ // Print out module-level global variables here.
+ for (Module::const_giterator I = M.gbegin(), E = M.gend(); I != E; ++I) {
+ std::string name(getValueName(I));
+ if (I->hasInitializer()) {
+ Constant *C = I->getInitializer();
+ O << "\t.data\n";
+ O << "\t.globl " << name << "\n";
+ O << "\t.type " << name << ",@object\n";
+ O << "\t.size " << name << ","
+ << (unsigned)TD->getTypeSize(I->getType()) << "\n";
+ O << "\t.align " << (unsigned)TD->getTypeAlignment(C->getType()) << "\n";
+ O << name << ":\t\t\t\t\t#" << *C << "\n";
+ printConstantValueOnly (C);
+ } else {
+ O << "\t.globl " << name << "\n";
+ O << "\t.comm " << name << ", "
+ << (unsigned)TD->getTypeSize(I->getType()) << ", "
+ << (unsigned)TD->getTypeAlignment(I->getType()) << "\n";
+ }
+ }
+ MangledGlobals.clear();
+ return false; // success
}
projects / oota-llvm.git / blobdiff