-//===-- PPC32AsmPrinter.cpp - Print machine instrs to PowerPC assembly ----===//
+//===-- PowerPCAsmPrinter.cpp - Print machine instrs to PowerPC assembly --===//
//
// The LLVM Compiler Infrastructure
//
#define DEBUG_TYPE "asmprinter"
#include "PowerPC.h"
-#include "PPC32TargetMachine.h"
+#include "PowerPCTargetMachine.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
struct PPC32AsmPrinter : public AsmPrinter {
std::set<std::string> FnStubs, GVStubs, LinkOnceStubs;
std::set<std::string> Strings;
-
+
PPC32AsmPrinter(std::ostream &O, TargetMachine &TM)
- : AsmPrinter(O, TM), LabelNumber(0) {
- CommentString = ";";
- GlobalPrefix = "_";
- ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
- Data64bitsDirective = 0; // we can't emit a 64-bit unit
- AlignmentIsInBytes = false; // Alignment is by power of 2.
- }
+ : AsmPrinter(O, TM), LabelNumber(0) {}
/// Unique incrementer for label values for referencing Global values.
///
unsigned LabelNumber;
virtual const char *getPassName() const {
- return "PPC32 Assembly Printer";
+ return "PowerPC Assembly Printer";
}
- PPC32TargetMachine &getTM() {
- return static_cast<PPC32TargetMachine&>(TM);
+ PowerPCTargetMachine &getTM() {
+ return static_cast<PowerPCTargetMachine&>(TM);
}
/// printInstruction - This method is automatically generated by tablegen
void printMachineInstruction(const MachineInstr *MI);
void printOp(const MachineOperand &MO, bool LoadAddrOp = false);
- void printImmOp(const MachineOperand &MO, unsigned ArgType);
void printOperand(const MachineInstr *MI, unsigned OpNo, MVT::ValueType VT){
const MachineOperand &MO = MI->getOperand(OpNo);
assert(value <= 63 && "Invalid u6imm argument!");
O << (unsigned int)value;
}
+ void printS16ImmOperand(const MachineInstr *MI, unsigned OpNo,
+ MVT::ValueType VT) {
+ O << (short)MI->getOperand(OpNo).getImmedValue();
+ }
void printU16ImmOperand(const MachineInstr *MI, unsigned OpNo,
MVT::ValueType VT) {
O << (unsigned short)MI->getOperand(OpNo).getImmedValue();
}
void printBranchOperand(const MachineInstr *MI, unsigned OpNo,
MVT::ValueType VT) {
- printOp(MI->getOperand(OpNo));
+
+ // Branches can take an immediate operand. This is used by the branch
+ // selection pass to print $+8, an eight byte displacement from the PC.
+ if (MI->getOperand(OpNo).isImmediate()) {
+ O << "$+" << MI->getOperand(OpNo).getImmedValue() << '\n';
+ } else {
+ printOp(MI->getOperand(OpNo));
+ }
}
void printPICLabel(const MachineInstr *MI, unsigned OpNo,
MVT::ValueType VT) {
O << "\"L0000" << LabelNumber << "$pb\"\n";
O << "\"L0000" << LabelNumber << "$pb\":";
}
+ void printSymbolHi(const MachineInstr *MI, unsigned OpNo,
+ MVT::ValueType VT) {
+ O << "ha16(";
+ printOp(MI->getOperand(OpNo), true /* LoadAddrOp */);
+ O << "-\"L0000" << LabelNumber << "$pb\")";
+ }
+ void printSymbolLo(const MachineInstr *MI, unsigned OpNo,
+ MVT::ValueType VT) {
+ // FIXME: Because LFS, LFD, and LWZ can be used either with a s16imm or
+ // a lo16 of a global or constant pool operand, we must handle both here.
+ // this isn't a great design, but it works for now.
+ if (MI->getOperand(OpNo).isImmediate()) {
+ O << (short)MI->getOperand(OpNo).getImmedValue();
+ } else {
+ O << "lo16(";
+ printOp(MI->getOperand(OpNo), true /* LoadAddrOp */);
+ O << "-\"L0000" << LabelNumber << "$pb\")";
+ }
+ }
+
+ virtual void printConstantPool(MachineConstantPool *MCP) = 0;
+ virtual bool runOnMachineFunction(MachineFunction &F) = 0;
+ virtual bool doFinalization(Module &M) = 0;
+ };
+
+ //
+ //
+ struct DarwinAsmPrinter : public PPC32AsmPrinter {
+
+ DarwinAsmPrinter(std::ostream &O, TargetMachine &TM)
+ : PPC32AsmPrinter(O, TM) {
+ CommentString = ";";
+ GlobalPrefix = "_";
+ ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
+ Data64bitsDirective = 0; // we can't emit a 64-bit unit
+ AlignmentIsInBytes = false; // Alignment is by power of 2.
+ }
+
+ virtual const char *getPassName() const {
+ return "Darwin PPC Assembly Printer";
+ }
void printConstantPool(MachineConstantPool *MCP);
bool runOnMachineFunction(MachineFunction &F);
bool doFinalization(Module &M);
};
+
+ //
+ //
+ struct AIXAsmPrinter : public PPC32AsmPrinter {
+ /// Map for labels corresponding to global variables
+ ///
+ std::map<const GlobalVariable*,std::string> GVToLabelMap;
+
+ AIXAsmPrinter(std::ostream &O, TargetMachine &TM)
+ : PPC32AsmPrinter(O, TM) {
+ CommentString = "#";
+ GlobalPrefix = "_";
+ ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
+ Data64bitsDirective = 0; // we can't emit a 64-bit unit
+ AlignmentIsInBytes = false; // Alignment is by power of 2.
+ }
+
+ virtual const char *getPassName() const {
+ return "AIX PPC Assembly Printer";
+ }
+
+ void printConstantPool(MachineConstantPool *MCP);
+ bool runOnMachineFunction(MachineFunction &F);
+ bool doInitialization(Module &M);
+ bool doFinalization(Module &M);
+ };
} // end of anonymous namespace
-/// createPPC32AsmPrinterPass - Returns a pass that prints the PPC
-/// assembly code for a MachineFunction to the given output stream,
-/// using the given target machine description. This should work
-/// regardless of whether the function is in SSA form or not.
-///
-FunctionPass *llvm::createPPC32AsmPrinter(std::ostream &o, TargetMachine &tm) {
- return new PPC32AsmPrinter(o, tm);
+// SwitchSection - Switch to the specified section of the executable if we are
+// not already in it!
+//
+static void SwitchSection(std::ostream &OS, std::string &CurSection,
+ const char *NewSection) {
+ if (CurSection != NewSection) {
+ CurSection = NewSection;
+ if (!CurSection.empty())
+ OS << "\t" << NewSection << "\n";
+ }
}
-// Include the auto-generated portion of the assembly writer
-#include "PowerPCGenAsmWriter.inc"
+/// isStringCompatible - 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;
-/// printConstantPool - Print to the current output stream assembly
-/// representations of the constants in the constant pool MCP. This is
-/// used to print out constants which have been "spilled to memory" by
-/// the code generator.
+ 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 digit.
///
-void PPC32AsmPrinter::printConstantPool(MachineConstantPool *MCP) {
- const std::vector<Constant*> &CP = MCP->getConstants();
- const TargetData &TD = TM.getTargetData();
-
- if (CP.empty()) return;
+static inline char toOctal(int X) {
+ return (X&7)+'0';
+}
- for (unsigned i = 0, e = CP.size(); i != e; ++i) {
- O << "\t.const\n";
- emitAlignment(TD.getTypeAlignmentShift(CP[i]->getType()));
- O << ".CPI" << CurrentFnName << "_" << i << ":\t\t\t\t\t" << CommentString
- << *CP[i] << "\n";
- emitGlobalConstant(CP[i]);
+// Possible states while outputting ASCII strings
+namespace {
+ enum StringSection {
+ None,
+ Alpha,
+ Numeric
+ };
+}
+
+/// SwitchStringSection - manage the changes required to output bytes as
+/// characters in a string vs. numeric decimal values
+///
+static inline void SwitchStringSection(std::ostream &O, StringSection NewSect,
+ StringSection &Current) {
+ if (Current == None) {
+ if (NewSect == Alpha)
+ O << "\t.byte \"";
+ else if (NewSect == Numeric)
+ O << "\t.byte ";
+ } else if (Current == Alpha) {
+ if (NewSect == None)
+ O << "\"";
+ else if (NewSect == Numeric)
+ O << "\"\n"
+ << "\t.byte ";
+ } else if (Current == Numeric) {
+ if (NewSect == Alpha)
+ O << '\n'
+ << "\t.byte \"";
+ else if (NewSect == Numeric)
+ O << ", ";
}
+
+ Current = NewSect;
}
-/// runOnMachineFunction - This uses the printMachineInstruction()
-/// method to print assembly for each instruction.
+/// getAsCString - Return the specified array as a C compatible
+/// string, only if the predicate isStringCompatible is true.
///
-bool PPC32AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
- setupMachineFunction(MF);
- O << "\n\n";
-
- // Print out constants referenced by the function
- printConstantPool(MF.getConstantPool());
+static void printAsCString(std::ostream &O, const ConstantArray *CVA) {
+ assert(isStringCompatible(CVA) && "Array is not string compatible!");
- // Print out labels for the function.
- O << "\t.text\n";
- emitAlignment(2);
- O << "\t.globl\t" << CurrentFnName << "\n";
- O << CurrentFnName << ":\n";
+ if (CVA->getNumOperands() == 0)
+ return;
- // 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 << ".LBB" << CurrentFnName << "_" << I->getNumber() << ":\t"
- << CommentString << " " << 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";
- printMachineInstruction(II);
+ StringSection Current = None;
+ for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i) {
+ unsigned char C = cast<ConstantInt>(CVA->getOperand(i))->getRawValue();
+ if (C == '"') {
+ SwitchStringSection(O, Alpha, Current);
+ O << "\"\"";
+ } else if (isprint(C)) {
+ SwitchStringSection(O, Alpha, Current);
+ O << C;
+ } else {
+ SwitchStringSection(O, Numeric, Current);
+ O << utostr((unsigned)C);
}
}
- ++LabelNumber;
+ SwitchStringSection(O, None, Current);
+ O << '\n';
+}
- // We didn't modify anything.
- return false;
+/// createDarwinAsmPrinterPass - Returns a pass that prints the PPC assembly
+/// code for a MachineFunction to the given output stream, in a format that the
+/// Darwin assembler can deal with.
+///
+FunctionPass *llvm::createDarwinAsmPrinter(std::ostream &o, TargetMachine &tm) {
+ return new DarwinAsmPrinter(o, tm);
+}
+
+/// createAIXAsmPrinterPass - Returns a pass that prints the PPC assembly code
+/// for a MachineFunction to the given output stream, in a format that the
+/// AIX 5L assembler can deal with.
+///
+FunctionPass *llvm::createAIXAsmPrinter(std::ostream &o, TargetMachine &tm) {
+ return new AIXAsmPrinter(o, tm);
}
+// Include the auto-generated portion of the assembly writer
+#include "PowerPCGenAsmWriter.inc"
+
void PPC32AsmPrinter::printOp(const MachineOperand &MO,
bool LoadAddrOp /* = false */) {
const MRegisterInfo &RI = *TM.getRegisterInfo();
}
}
-void PPC32AsmPrinter::printImmOp(const MachineOperand &MO, unsigned ArgType) {
- int Imm = MO.getImmedValue();
- if (ArgType == PPCII::Simm16 || ArgType == PPCII::Disimm16) {
- O << (short)Imm;
- } else {
- O << Imm;
- }
-}
-
/// printMachineInstruction -- Print out a single PowerPC MI in Darwin syntax to
/// the current output stream.
///
++EmittedInsts;
if (printInstruction(MI))
return; // Printer was automatically generated
-
- unsigned Opcode = MI->getOpcode();
- const TargetInstrInfo &TII = *TM.getInstrInfo();
- const TargetInstrDescriptor &Desc = TII.get(Opcode);
- unsigned i;
-
- unsigned ArgCount = MI->getNumOperands();
- unsigned ArgType[] = {
- (Desc.TSFlags >> PPCII::Arg0TypeShift) & PPCII::ArgTypeMask,
- (Desc.TSFlags >> PPCII::Arg1TypeShift) & PPCII::ArgTypeMask,
- (Desc.TSFlags >> PPCII::Arg2TypeShift) & PPCII::ArgTypeMask,
- (Desc.TSFlags >> PPCII::Arg3TypeShift) & PPCII::ArgTypeMask,
- (Desc.TSFlags >> PPCII::Arg4TypeShift) & PPCII::ArgTypeMask
- };
- assert(((Desc.TSFlags & PPCII::VMX) == 0) &&
- "Instruction requires VMX support");
- assert(((Desc.TSFlags & PPCII::PPC64) == 0) &&
- "Instruction requires 64 bit support");
-
- O << TII.getName(Opcode) << " ";
- if (Opcode == PPC::LOADHiAddr) {
- printOp(MI->getOperand(0));
- O << ", ";
- if (MI->getOperand(1).getReg() == PPC::R0)
- O << "0";
- else
- printOp(MI->getOperand(1));
- O << ", ha16(" ;
- printOp(MI->getOperand(2), true /* LoadAddrOp */);
- O << "-\"L0000" << LabelNumber << "$pb\")\n";
- } else if (ArgCount == 3 && (MI->getOperand(2).isConstantPoolIndex()
- || MI->getOperand(2).isGlobalAddress())) {
- printOp(MI->getOperand(0));
- O << ", lo16(";
- printOp(MI->getOperand(2), true /* LoadAddrOp */);
- O << "-\"L0000" << LabelNumber << "$pb\")";
- O << "(";
- if (MI->getOperand(1).getReg() == PPC::R0)
- O << "0";
- else
- printOp(MI->getOperand(1));
- O << ")\n";
- } else if (ArgCount == 3 && ArgType[1] == PPCII::Disimm16) {
- printOp(MI->getOperand(0));
- O << ", ";
- printImmOp(MI->getOperand(1), ArgType[1]);
- O << "(";
- if (MI->getOperand(2).hasAllocatedReg() &&
- MI->getOperand(2).getReg() == PPC::R0)
- O << "0";
- else
- printOp(MI->getOperand(2));
- O << ")\n";
- } else {
- for (i = 0; i < ArgCount; ++i) {
- // addi and friends
- if (i == 1 && ArgCount == 3 && ArgType[2] == PPCII::Simm16 &&
- MI->getOperand(1).hasAllocatedReg() &&
- MI->getOperand(1).getReg() == PPC::R0) {
- O << "0";
- // for long branch support, bc $+8
- } else if (i == 1 && ArgCount == 2 && MI->getOperand(1).isImmediate() &&
- TII.isBranch(MI->getOpcode())) {
- O << "$+8";
- assert(8 == MI->getOperand(i).getImmedValue()
- && "branch off PC not to pc+8?");
- //printOp(MI->getOperand(i));
- } else if (MI->getOperand(i).isImmediate()) {
- printImmOp(MI->getOperand(i), ArgType[i]);
- } else {
- printOp(MI->getOperand(i));
- }
- if (ArgCount - 1 == i)
- O << "\n";
- else
- O << ", ";
+
+ assert(0 && "Unhandled instruction in asm writer!");
+ abort();
+ return;
+}
+
+/// runOnMachineFunction - This uses the printMachineInstruction()
+/// method to print assembly for each instruction.
+///
+bool DarwinAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+ setupMachineFunction(MF);
+ O << "\n\n";
+
+ // Print out constants referenced by the function
+ printConstantPool(MF.getConstantPool());
+
+ // Print out labels for the function.
+ O << "\t.text\n";
+ emitAlignment(2);
+ O << "\t.globl\t" << CurrentFnName << "\n";
+ O << CurrentFnName << ":\n";
+
+ // 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 << ".LBB" << CurrentFnName << "_" << I->getNumber() << ":\t"
+ << CommentString << " " << 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";
+ printMachineInstruction(II);
}
}
- return;
+ ++LabelNumber;
+
+ // We didn't modify anything.
+ return false;
}
-// SwitchSection - Switch to the specified section of the executable if we are
-// not already in it!
-//
-static void SwitchSection(std::ostream &OS, std::string &CurSection,
- const char *NewSection) {
- if (CurSection != NewSection) {
- CurSection = NewSection;
- if (!CurSection.empty())
- OS << "\t" << NewSection << "\n";
+/// printConstantPool - Print to the current output stream assembly
+/// representations of the constants in the constant pool MCP. This is
+/// used to print out constants which have been "spilled to memory" by
+/// the code generator.
+///
+void DarwinAsmPrinter::printConstantPool(MachineConstantPool *MCP) {
+ const std::vector<Constant*> &CP = MCP->getConstants();
+ const TargetData &TD = TM.getTargetData();
+
+ if (CP.empty()) return;
+
+ for (unsigned i = 0, e = CP.size(); i != e; ++i) {
+ O << "\t.const\n";
+ emitAlignment(TD.getTypeAlignmentShift(CP[i]->getType()));
+ O << ".CPI" << CurrentFnName << "_" << i << ":\t\t\t\t\t" << CommentString
+ << *CP[i] << "\n";
+ emitGlobalConstant(CP[i]);
}
}
-bool PPC32AsmPrinter::doFinalization(Module &M) {
+bool DarwinAsmPrinter::doFinalization(Module &M) {
const TargetData &TD = TM.getTargetData();
std::string CurSection;
AsmPrinter::doFinalization(M);
return false; // success
}
+
+/// runOnMachineFunction - This uses the printMachineInstruction()
+/// method to print assembly for each instruction.
+///
+bool AIXAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+ CurrentFnName = MF.getFunction()->getName();
+
+ // Print out constants referenced by the function
+ printConstantPool(MF.getConstantPool());
+
+ // Print out header for the function.
+ O << "\t.csect .text[PR]\n"
+ << "\t.align 2\n"
+ << "\t.globl " << CurrentFnName << '\n'
+ << "\t.globl ." << CurrentFnName << '\n'
+ << "\t.csect " << CurrentFnName << "[DS],3\n"
+ << CurrentFnName << ":\n"
+ << "\t.llong ." << CurrentFnName << ", TOC[tc0], 0\n"
+ << "\t.csect .text[PR]\n"
+ << '.' << CurrentFnName << ":\n";
+
+ // 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 << "LBB" << CurrentFnName << "_" << I->getNumber() << ":\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";
+ printMachineInstruction(II);
+ }
+ }
+ ++LabelNumber;
+
+ O << "LT.." << CurrentFnName << ":\n"
+ << "\t.long 0\n"
+ << "\t.byte 0,0,32,65,128,0,0,0\n"
+ << "\t.long LT.." << CurrentFnName << "-." << CurrentFnName << '\n'
+ << "\t.short 3\n"
+ << "\t.byte \"" << CurrentFnName << "\"\n"
+ << "\t.align 2\n";
+
+ // We didn't modify anything.
+ return false;
+}
+
+/// printConstantPool - Print to the current output stream assembly
+/// representations of the constants in the constant pool MCP. This is
+/// used to print out constants which have been "spilled to memory" by
+/// the code generator.
+///
+void AIXAsmPrinter::printConstantPool(MachineConstantPool *MCP) {
+ const std::vector<Constant*> &CP = MCP->getConstants();
+ const TargetData &TD = TM.getTargetData();
+
+ if (CP.empty()) return;
+
+ for (unsigned i = 0, e = CP.size(); i != e; ++i) {
+ O << "\t.const\n";
+ O << "\t.align " << (unsigned)TD.getTypeAlignment(CP[i]->getType())
+ << "\n";
+ O << ".CPI" << CurrentFnName << "_" << i << ":\t\t\t\t\t;"
+ << *CP[i] << "\n";
+ emitGlobalConstant(CP[i]);
+ }
+}
+
+bool AIXAsmPrinter::doInitialization(Module &M) {
+ const TargetData &TD = TM.getTargetData();
+ std::string CurSection;
+
+ O << "\t.machine \"ppc64\"\n"
+ << "\t.toc\n"
+ << "\t.csect .text[PR]\n";
+
+ // Print out module-level global variables
+ for (Module::const_giterator I = M.gbegin(), E = M.gend(); I != E; ++I) {
+ if (!I->hasInitializer())
+ continue;
+
+ std::string Name = I->getName();
+ Constant *C = I->getInitializer();
+ // N.B.: We are defaulting to writable strings
+ if (I->hasExternalLinkage()) {
+ O << "\t.globl " << Name << '\n'
+ << "\t.csect .data[RW],3\n";
+ } else {
+ O << "\t.csect _global.rw_c[RW],3\n";
+ }
+ O << Name << ":\n";
+ emitGlobalConstant(C);
+ }
+
+ // Output labels for globals
+ if (M.gbegin() != M.gend()) O << "\t.toc\n";
+ for (Module::const_giterator I = M.gbegin(), E = M.gend(); I != E; ++I) {
+ const GlobalVariable *GV = I;
+ // Do not output labels for unused variables
+ if (GV->isExternal() && GV->use_begin() == GV->use_end())
+ continue;
+
+ std::string Name = GV->getName();
+ std::string Label = "LC.." + utostr(LabelNumber++);
+ GVToLabelMap[GV] = Label;
+ O << Label << ":\n"
+ << "\t.tc " << Name << "[TC]," << Name;
+ if (GV->isExternal()) O << "[RW]";
+ O << '\n';
+ }
+
+ Mang = new Mangler(M, ".");
+ return false; // success
+}
+
+bool AIXAsmPrinter::doFinalization(Module &M) {
+ const TargetData &TD = TM.getTargetData();
+ // Print out module-level global variables
+ for (Module::const_giterator I = M.gbegin(), E = M.gend(); I != E; ++I) {
+ if (I->hasInitializer() || I->hasExternalLinkage())
+ continue;
+
+ std::string Name = I->getName();
+ if (I->hasInternalLinkage()) {
+ O << "\t.lcomm " << Name << ",16,_global.bss_c";
+ } else {
+ O << "\t.comm " << Name << "," << TD.getTypeSize(I->getType())
+ << "," << log2((unsigned)TD.getTypeAlignment(I->getType()));
+ }
+ O << "\t\t# ";
+ WriteAsOperand(O, I, true, true, &M);
+ O << "\n";
+ }
+
+ O << "_section_.text:\n"
+ << "\t.csect .data[RW],3\n"
+ << "\t.llong _section_.text\n";
+
+ delete Mang;
+ return false; // success
+}
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