-//===-- PPC32/Printer.cpp - Convert X86 LLVM code to Intel assembly ---------===//
+//===-- PPC32AsmPrinter.cpp - Print machine instrs to PowerPC assembly ----===//
//
// The LLVM Compiler Infrastructure
//
//
//===----------------------------------------------------------------------===//
//
-// This file contains a printer that converts from our internal
-// representation of machine-dependent LLVM code to Intel-format
-// assembly language. This printer is the output mechanism used
-// by `llc' and `lli -print-machineinstrs' on X86.
+// This file contains a printer that converts from our internal representation
+// of machine-dependent LLVM code to PowerPC assembly language. This printer is
+// the output mechanism used by `llc'.
//
-// Documentation at
-// http://developer.apple.com/documentation/DeveloperTools/
-// Reference/Assembler/ASMIntroduction/chapter_1_section_1.html
+// Documentation at http://developer.apple.com/documentation/DeveloperTools/
+// Reference/Assembler/ASMIntroduction/chapter_1_section_1.html
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "asmprinter"
#include "PowerPC.h"
#include "PowerPCInstrInfo.h"
+#include "PPC32TargetMachine.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
/// Target machine description which we query for reg. names, data
/// layout, etc.
///
- TargetMachine &TM;
+ PPC32TargetMachine &TM;
/// Name-mangler for global names.
///
Mangler *Mang;
- std::set<std::string> Stubs;
+ std::set<std::string> FnStubs, GVStubs, LinkOnceStubs;
std::set<std::string> Strings;
- Printer(std::ostream &o, TargetMachine &tm) : O(o), TM(tm), labelNumber(0)
- { }
+ Printer(std::ostream &o, TargetMachine &tm) : O(o),
+ TM(reinterpret_cast<PPC32TargetMachine&>(tm)), LabelNumber(0) {}
/// Cache of mangled name for current function. This is
/// recalculated at the beginning of each call to
///
std::string CurrentFnName;
- /// Unique incrementer for label values for referencing
- /// Global values.
+ /// Unique incrementer for label values for referencing Global values.
///
- unsigned int labelNumber;
-
+ unsigned LabelNumber;
+
virtual const char *getPassName() const {
- return "PowerPC Assembly Printer";
+ return "PPC32 Assembly Printer";
}
void printMachineInstruction(const MachineInstr *MI);
void printOp(const MachineOperand &MO, bool elideOffsetKeyword = false);
+ void printImmOp(const MachineOperand &MO, unsigned ArgType);
void printConstantPool(MachineConstantPool *MCP);
bool runOnMachineFunction(MachineFunction &F);
bool doInitialization(Module &M);
};
} // end of anonymous namespace
-/// createPPCCodePrinterPass - Returns a pass that prints the PPC
+/// 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.
+/// regardless of whether the function is in SSA form or not.
///
-FunctionPass *createPPCCodePrinterPass(std::ostream &o,TargetMachine &tm) {
+FunctionPass *createPPC32AsmPrinter(std::ostream &o,TargetMachine &tm) {
return new Printer(o, tm);
}
} else if (isprint(C)) {
O << C;
} else {
- switch(C) {
+ switch (C) {
case '\b': O << "\\b"; break;
case '\f': O << "\\f"; break;
case '\n': O << "\\n"; break;
O << CI->getValue();
else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
O << CI->getValue();
- else if (const ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(CV))
+ else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
// This is a constant address for a global variable or function. Use the
// name of the variable or function as the address value.
- O << Mang->getValueName(CPR->getValue());
+ O << Mang->getValueName(GV);
else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
const TargetData &TD = TM.getTargetData();
- switch(CE->getOpcode()) {
+ switch (CE->getOpcode()) {
case Instruction::GetElementPtr: {
// generate a symbolic expression for the byte address
const Constant *ptrVal = CE->getOperand(0);
void Printer::emitGlobalConstant(const Constant *CV) {
const TargetData &TD = TM.getTargetData();
- if (CV->isNullValue()) {
- O << "\t.space\t " << TD.getTypeSize(CV->getType()) << "\n";
- return;
- } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
+ if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
if (isStringCompatible(CVA)) {
O << "\t.ascii ";
printAsCString(O, CVA);
O << "\n";
} else { // Not a string. Print the values in successive locations
- const std::vector<Use> &constValues = CVA->getValues();
- for (unsigned i=0; i < constValues.size(); i++)
- emitGlobalConstant(cast<Constant>(constValues[i].get()));
+ for (unsigned i=0, e = CVA->getNumOperands(); i != e; i++)
+ emitGlobalConstant(CVA->getOperand(i));
}
return;
} 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());
+ for (unsigned i = 0, e = CVS->getNumOperands(); i != e; i++) {
+ const Constant* field = CVS->getOperand(i);
// Check if padding is needed and insert one or more 0s.
unsigned fieldSize = TD.getTypeSize(field->getType());
- unsigned padSize = ((i == N-1? cvsLayout->StructSize
+ unsigned padSize = ((i == e-1? cvsLayout->StructSize
: cvsLayout->MemberOffsets[i+1])
- cvsLayout->MemberOffsets[i]) - fieldSize;
sizeSoFar += fieldSize + padSize;
O << ".long\t" << U.T.MSWord << "\t; double most significant word "
<< Val << "\n";
- O << ".long\t" << U.T.LSWord << "\t; double least significant word"
+ O << ".long\t" << U.T.LSWord << "\t; double least significant word "
<< Val << "\n";
return;
}
}
- } else if (CV->getType()->getPrimitiveSize() == 64) {
+ } else if (CV->getType() == Type::ULongTy || CV->getType() == Type::LongTy) {
if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
union DU { // Abide by C TBAA rules
int64_t UVal;
O << ".long\t" << U.T.MSWord << "\t; Double-word most significant word "
<< U.UVal << "\n";
- O << ".long\t" << U.T.LSWord << "\t; Double-word least significant word"
+ O << ".long\t" << U.T.LSWord << "\t; Double-word least significant word "
<< U.UVal << "\n";
return;
}
case Type::FloatTyID: case Type::DoubleTyID:
assert (0 && "Should have already output floating point constant.");
default:
- assert (0 && "Can't handle printing this type of thing");
+ if (CV == Constant::getNullValue(type)) { // Zero initializer?
+ O << ".space\t" << TD.getTypeSize(type) << "\n";
+ return;
+ }
+ std::cerr << "Can't handle printing: " << *CV;
+ abort();
break;
}
O << "\t";
printMachineInstruction(II);
}
}
+ ++LabelNumber;
// We didn't modify anything.
return false;
}
// FALLTHROUGH
case MachineOperand::MO_MachineRegister:
+ case MachineOperand::MO_CCRegister:
O << LowercaseString(RI.get(MO.getReg()).Name);
return;
case MachineOperand::MO_SignExtendedImmed:
case MachineOperand::MO_UnextendedImmed:
- O << (int)MO.getImmedValue();
+ std::cerr << "printOp() does not handle immediate values\n";
+ abort();
return;
+
+ case MachineOperand::MO_PCRelativeDisp:
+ std::cerr << "Shouldn't use addPCDisp() when building PPC MachineInstrs";
+ abort();
+ return;
+
case MachineOperand::MO_MachineBasicBlock: {
MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
O << ".LBB" << Mang->getValueName(MBBOp->getParent()->getFunction())
<< MBBOp->getBasicBlock()->getName();
return;
}
- case MachineOperand::MO_PCRelativeDisp:
- std::cerr << "Shouldn't use addPCDisp() when building PPC MachineInstrs";
- abort();
+
+ case MachineOperand::MO_ConstantPoolIndex:
+ O << ".CPI" << CurrentFnName << "_" << MO.getConstantPoolIndex();
return;
+
+ case MachineOperand::MO_ExternalSymbol:
+ O << MO.getSymbolName();
+ return;
+
case MachineOperand::MO_GlobalAddress:
if (!elideOffsetKeyword) {
+ GlobalValue *GV = MO.getGlobal();
+ std::string Name = Mang->getValueName(GV);
+
// Dynamically-resolved functions need a stub for the function
- Function *F = dyn_cast<Function>(MO.getGlobal());
- if (F && F->isExternal()) {
- Stubs.insert(Mang->getValueName(MO.getGlobal()));
- O << "L" << Mang->getValueName(MO.getGlobal()) << "$stub";
- } else {
- O << Mang->getValueName(MO.getGlobal());
+ Function *F = dyn_cast<Function>(GV);
+ if (F && F->isExternal() &&
+ TM.CalledFunctions.find(F) != TM.CalledFunctions.end()) {
+ FnStubs.insert(Name);
+ O << "L" << Name << "$stub";
+ return;
}
+
+ // External global variables need a non-lazily-resolved stub
+ if (!GV->hasInternalLinkage() &&
+ TM.AddressTaken.find(GV) != TM.AddressTaken.end()) {
+ GVStubs.insert(Name);
+ O << "L" << Name << "$non_lazy_ptr";
+ return;
+ }
+
+ O << Mang->getValueName(GV);
}
return;
- case MachineOperand::MO_ExternalSymbol:
- O << MO.getSymbolName();
- return;
+
default:
- O << "<unknown operand type>";
+ O << "<unknown operand type: " << MO.getType() << ">";
return;
}
}
-#if 0
-static inline
-unsigned int ValidOpcodes(const MachineInstr *MI, unsigned int ArgType[5]) {
- int i;
- unsigned int retval = 1;
-
- for(i = 0; i<5; i++) {
- switch(ArgType[i]) {
- case none:
- break;
- case Gpr:
- case Gpr0:
- Type::UIntTy
- case Simm16:
- case Zimm16:
- case PCRelimm24:
- case Imm24:
- case Imm5:
- case PCRelimm14:
- case Imm14:
- case Imm2:
- case Crf:
- case Imm3:
- case Imm1:
- case Fpr:
- case Imm4:
- case Imm8:
- case Disimm16:
- case Spr:
- case Sgr:
- };
-
- }
+void Printer::printImmOp(const MachineOperand &MO, unsigned ArgType) {
+ int Imm = MO.getImmedValue();
+ if (ArgType == PPCII::Simm16 || ArgType == PPCII::Disimm16) {
+ O << (short)Imm;
+ } else if (ArgType == PPCII::Zimm16) {
+ O << (unsigned short)Imm;
+ } else {
+ O << Imm;
}
}
-#endif
-/// printMachineInstruction -- Print out a single PPC32 LLVM instruction
+/// printMachineInstruction -- Print out a single PPC LLVM instruction
/// MI in Darwin syntax to the current output stream.
///
void Printer::printMachineInstruction(const MachineInstr *MI) {
unsigned Opcode = MI->getOpcode();
const TargetInstrInfo &TII = *TM.getInstrInfo();
const TargetInstrDescriptor &Desc = TII.get(Opcode);
- unsigned int i;
-
- unsigned int ArgCount = MI->getNumOperands();
- //Desc.TSFlags & PPC32II::ArgCountMask;
- unsigned int ArgType[] = {
- (Desc.TSFlags >> PPC32II::Arg0TypeShift) & PPC32II::ArgTypeMask,
- (Desc.TSFlags >> PPC32II::Arg1TypeShift) & PPC32II::ArgTypeMask,
- (Desc.TSFlags >> PPC32II::Arg2TypeShift) & PPC32II::ArgTypeMask,
- (Desc.TSFlags >> PPC32II::Arg3TypeShift) & PPC32II::ArgTypeMask,
- (Desc.TSFlags >> PPC32II::Arg4TypeShift) & PPC32II::ArgTypeMask
+ 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 & PPC32II::VMX) == 0) &&
+ assert(((Desc.TSFlags & PPCII::VMX) == 0) &&
"Instruction requires VMX support");
- assert(((Desc.TSFlags & PPC32II::PPC64) == 0) &&
+ assert(((Desc.TSFlags & PPCII::PPC64) == 0) &&
"Instruction requires 64 bit support");
- //assert ( ValidOpcodes(MI, ArgType) && "Instruction has invalid inputs");
++EmittedInsts;
- // FIXME: should probably be converted to cout.width and cout.fill
- if (Opcode == PPC32::MovePCtoLR) {
- O << "bcl 20,31,\"L0000" << labelNumber << "$pb\"\n";
- O << "\"L0000" << labelNumber << "$pb\":\n";
+ // CALLpcrel and CALLindirect are handled specially here to print only the
+ // appropriate number of args that the assembler expects. This is because
+ // may have many arguments appended to record the uses of registers that are
+ // holding arguments to the called function.
+ if (Opcode == PPC::COND_BRANCH) {
+ std::cerr << "Error: untranslated conditional branch psuedo instruction!\n";
+ abort();
+ } else if (Opcode == PPC::IMPLICIT_DEF) {
+ O << "; IMPLICIT DEF ";
+ printOp(MI->getOperand(0));
+ O << "\n";
+ return;
+ } else if (Opcode == PPC::CALLpcrel) {
+ O << TII.getName(Opcode) << " ";
+ printOp(MI->getOperand(0));
+ O << "\n";
+ return;
+ } else if (Opcode == PPC::CALLindirect) {
+ O << TII.getName(Opcode) << " ";
+ printImmOp(MI->getOperand(0), ArgType[0]);
+ O << ", ";
+ printImmOp(MI->getOperand(1), ArgType[0]);
+ O << "\n";
+ return;
+ } else if (Opcode == PPC::MovePCtoLR) {
+ // FIXME: should probably be converted to cout.width and cout.fill
+ O << "bl \"L0000" << LabelNumber << "$pb\"\n";
+ O << "\"L0000" << LabelNumber << "$pb\":\n";
O << "\tmflr ";
printOp(MI->getOperand(0));
O << "\n";
return;
}
- O << TII.getName(MI->getOpcode()) << " ";
- DEBUG(std::cerr << TII.getName(MI->getOpcode()) << " expects "
- << ArgCount << " args\n");
-
- if (Opcode == PPC32::LOADLoAddr) {
+ O << TII.getName(Opcode) << " ";
+ if (Opcode == PPC::LOADLoDirect || Opcode == PPC::LOADLoIndirect) {
printOp(MI->getOperand(0));
O << ", lo16(";
printOp(MI->getOperand(2));
- O << "-\"L0000" << labelNumber << "$pb\")";
- labelNumber++;
+ O << "-\"L0000" << LabelNumber << "$pb\")";
O << "(";
- if (MI->getOperand(1).getReg() == PPC32::R0)
+ if (MI->getOperand(1).getReg() == PPC::R0)
O << "0";
else
printOp(MI->getOperand(1));
O << ")\n";
- } else if (Opcode == PPC32::LOADHiAddr) {
+ } else if (Opcode == PPC::LOADHiAddr) {
printOp(MI->getOperand(0));
O << ", ";
- if (MI->getOperand(1).getReg() == PPC32::R0)
+ if (MI->getOperand(1).getReg() == PPC::R0)
O << "0";
else
printOp(MI->getOperand(1));
O << ", ha16(" ;
printOp(MI->getOperand(2));
- O << "-\"L0000" << labelNumber << "$pb\")\n";
- } else if (ArgCount == 3 && ArgType[1] == PPC32II::Disimm16) {
+ O << "-\"L0000" << LabelNumber << "$pb\")\n";
+ } else if (ArgCount == 3 && ArgType[1] == PPCII::Disimm16) {
printOp(MI->getOperand(0));
O << ", ";
- printOp(MI->getOperand(1));
+ printImmOp(MI->getOperand(1), ArgType[1]);
O << "(";
if (MI->getOperand(2).hasAllocatedReg() &&
- MI->getOperand(2).getReg() == PPC32::R0)
+ MI->getOperand(2).getReg() == PPC::R0)
O << "0";
else
printOp(MI->getOperand(2));
O << ")\n";
} else {
for (i = 0; i < ArgCount; ++i) {
- if (i == 1 && ArgCount == 3 && ArgType[2] == PPC32II::Simm16 &&
+ // addi and friends
+ if (i == 1 && ArgCount == 3 && ArgType[2] == PPCII::Simm16 &&
MI->getOperand(1).hasAllocatedReg() &&
- MI->getOperand(1).getReg() == PPC32::R0) {
+ 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 {
- //std::cout << "DEBUG " << (*(TM.getRegisterInfo())).get(MI->getOperand(i).getReg()).Name << "\n";
printOp(MI->getOperand(i));
}
if (ArgCount - 1 == i)
unsigned Size = TD.getTypeSize(C->getType());
unsigned Align = TD.getTypeAlignment(C->getType());
- if (C->isNullValue() &&
- (I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
- I->hasWeakLinkage() /* FIXME: Verify correct */)) {
+ if (C->isNullValue() && /* FIXME: Verify correct */
+ (I->hasInternalLinkage() || I->hasWeakLinkage())) {
SwitchSection(O, CurSection, ".data");
if (I->hasInternalLinkage())
- O << "\t.lcomm " << name << "," << TD.getTypeSize(C->getType())
+ O << ".lcomm " << name << "," << TD.getTypeSize(C->getType())
<< "," << (unsigned)TD.getTypeAlignment(C->getType());
else
- O << "\t.comm " << name << "," << TD.getTypeSize(C->getType());
+ O << ".comm " << name << "," << TD.getTypeSize(C->getType());
O << "\t\t; ";
WriteAsOperand(O, I, true, true, &M);
O << "\n";
} else {
switch (I->getLinkage()) {
case GlobalValue::LinkOnceLinkage:
+ O << ".section __TEXT,__textcoal_nt,coalesced,no_toc\n"
+ << ".weak_definition " << name << '\n'
+ << ".private_extern " << name << '\n'
+ << ".section __DATA,__datacoal_nt,coalesced,no_toc\n";
+ LinkOnceStubs.insert(name);
+ break;
case GlobalValue::WeakLinkage: // FIXME: Verify correct for weak.
// Nonnull linkonce -> weak
O << "\t.weak " << name << "\n";
SwitchSection(O, CurSection, "");
O << "\t.section\t.llvm.linkonce.d." << name << ",\"aw\",@progbits\n";
break;
-
case GlobalValue::AppendingLinkage:
// FIXME: appending linkage variables should go into a section of
// their name or something. For now, just emit them as external.
emitGlobalConstant(C);
}
}
-
- for(std::set<std::string>::iterator i = Stubs.begin(); i != Stubs.end(); ++i)
+
+ // Output stubs for link-once variables
+ if (LinkOnceStubs.begin() != LinkOnceStubs.end())
+ O << ".data\n.align 2\n";
+ for (std::set<std::string>::iterator i = LinkOnceStubs.begin(),
+ e = LinkOnceStubs.end(); i != e; ++i) {
+ O << *i << "$non_lazy_ptr:\n"
+ << "\t.long\t" << *i << '\n';
+ }
+
+ // Output stubs for dynamically-linked functions
+ for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
+ i != e; ++i)
{
- O << "\t.picsymbol_stub\n";
+ O << ".data\n";
+ O << ".section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32\n";
+ O << "\t.align 2\n";
O << "L" << *i << "$stub:\n";
O << "\t.indirect_symbol " << *i << "\n";
O << "\tmflr r0\n";
O << "\tmflr r11\n";
O << "\taddis r11,r11,ha16(L" << *i << "$lazy_ptr-L0$" << *i << ")\n";
O << "\tmtlr r0\n";
- O << "\tlwz r12,lo16(L" << *i << "$lazy_ptr-L0$" << *i << ")(r11)\n";
+ O << "\tlwzu r12,lo16(L" << *i << "$lazy_ptr-L0$" << *i << ")(r11)\n";
O << "\tmtctr r12\n";
- O << "\taddi r11,r11,lo16(L" << *i << "$lazy_ptr - L0$" << *i << ")\n";
O << "\tbctr\n";
O << ".data\n";
O << ".lazy_symbol_pointer\n";
O << "L" << *i << "$lazy_ptr:\n";
- O << ".indirect_symbol " << *i << "\n";
- O << ".long dyld_stub_binding_helper\n";
+ O << "\t.indirect_symbol " << *i << "\n";
+ O << "\t.long dyld_stub_binding_helper\n";
}
+ O << "\n";
+
+ // Output stubs for external global variables
+ if (GVStubs.begin() != GVStubs.end())
+ O << ".data\n.non_lazy_symbol_pointer\n";
+ for (std::set<std::string>::iterator i = GVStubs.begin(), e = GVStubs.end();
+ i != e; ++i) {
+ O << "L" << *i << "$non_lazy_ptr:\n";
+ O << "\t.indirect_symbol " << *i << "\n";
+ O << "\t.long\t0\n";
+ }
+
delete Mang;
return false; // success
}
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