X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;ds=sidebyside;f=lib%2FTarget%2FPowerPC%2FPPCAsmPrinter.cpp;h=5f3b5de7c6c9f0493907ff8bbc99fb8d0d5a2d96;hb=3d9a6c2842599b9d8659ae97e19c413d435d7b34;hp=bc9a97ce0261b6b31a4b5542ec5874120ff49b83;hpb=4363bdb0e5d20ebfa5b0a1f703c5a8102e637541;p=oota-llvm.git diff --git a/lib/Target/PowerPC/PPCAsmPrinter.cpp b/lib/Target/PowerPC/PPCAsmPrinter.cpp index bc9a97ce026..5f3b5de7c6c 100644 --- a/lib/Target/PowerPC/PPCAsmPrinter.cpp +++ b/lib/Target/PowerPC/PPCAsmPrinter.cpp @@ -1,4 +1,4 @@ -//===-- PPC32/Printer.cpp - Convert X86 LLVM code to Intel assembly ---------===// +//===-- PPC32AsmPrinter.cpp - Print machine instrs to PowerPC assembly ----===// // // The LLVM Compiler Infrastructure // @@ -7,20 +7,19 @@ // //===----------------------------------------------------------------------===// // -// 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" @@ -49,16 +48,16 @@ namespace { /// 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 Stubs; + std::set FnStubs, GVStubs, LinkOnceStubs; std::set Strings; - Printer(std::ostream &o, TargetMachine &tm) : O(o), TM(tm), labelNumber(0) - { } + Printer(std::ostream &o, TargetMachine &tm) : O(o), + TM(reinterpret_cast(tm)), LabelNumber(0) {} /// Cache of mangled name for current function. This is /// recalculated at the beginning of each call to @@ -66,17 +65,17 @@ namespace { /// 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); @@ -86,12 +85,12 @@ namespace { }; } // 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); } @@ -133,7 +132,7 @@ static void printAsCString(std::ostream &O, const ConstantArray *CVA) { } 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; @@ -163,13 +162,13 @@ void Printer::emitConstantValueOnly(const Constant *CV) { O << CI->getValue(); else if (const ConstantUInt *CI = dyn_cast(CV)) O << CI->getValue(); - else if (const ConstantPointerRef *CPR = dyn_cast(CV)) + else if (const GlobalValue *GV = dyn_cast(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(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); @@ -226,31 +225,26 @@ void Printer::emitConstantValueOnly(const Constant *CV) { 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(CV)) { + if (const ConstantArray *CVA = dyn_cast(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 &constValues = CVA->getValues(); - for (unsigned i=0; i < constValues.size(); i++) - emitGlobalConstant(cast(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(CV)) { // Print the fields in successive locations. Pad to align if needed! const StructLayout *cvsLayout = TD.getStructLayout(CVS->getType()); - const std::vector& constValues = CVS->getValues(); unsigned sizeSoFar = 0; - for (unsigned i=0, N = constValues.size(); i < N; i++) { - const Constant* field = cast(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; @@ -293,12 +287,12 @@ void Printer::emitGlobalConstant(const Constant *CV) { 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(CV)) { union DU { // Abide by C TBAA rules int64_t UVal; @@ -311,7 +305,7 @@ void Printer::emitGlobalConstant(const Constant *CV) { 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; } @@ -336,7 +330,12 @@ void Printer::emitGlobalConstant(const Constant *CV) { 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"; @@ -395,6 +394,7 @@ bool Printer::runOnMachineFunction(MachineFunction &MF) { printMachineInstruction(II); } } + ++LabelNumber; // We didn't modify anything. return false; @@ -413,13 +413,21 @@ void Printer::printOp(const MachineOperand &MO, } // 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()) @@ -427,148 +435,165 @@ void Printer::printOp(const MachineOperand &MO, << 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(MO.getGlobal()); - if (F && F->isExternal()) { - Stubs.insert(Mang->getValueName(MO.getGlobal())); - O << "L" << Mang->getValueName(MO.getGlobal()) << "$stub"; - } else { - O << Mang->getValueName(MO.getGlobal()); + Function *F = dyn_cast(GV); + if (F && F->isExternal() && + TM.CalledFunctions.find(F) != TM.CalledFunctions.end()) { + FnStubs.insert(Name); + O << "L" << Name << "$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 << ""; + O << ""; 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) @@ -609,28 +634,32 @@ bool Printer::doFinalization(Module &M) { 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. @@ -652,10 +681,23 @@ bool Printer::doFinalization(Module &M) { emitGlobalConstant(C); } } - - for(std::set::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::iterator i = LinkOnceStubs.begin(), + e = LinkOnceStubs.end(); i != e; ++i) { + O << *i << "$non_lazy_ptr:\n" + << "\t.long\t" << *i << '\n'; + } + + // Output stubs for dynamically-linked functions + for (std::set::iterator i = FnStubs.begin(), e = FnStubs.end(); + i != e; ++i) { - O << "\t.picsymbol_stub\n"; + O << ".data\n"; + O << ".section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32\n"; + O << "\t.align 2\n"; O << "L" << *i << "$stub:\n"; O << "\t.indirect_symbol " << *i << "\n"; O << "\tmflr r0\n"; @@ -664,17 +706,28 @@ bool Printer::doFinalization(Module &M) { 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 << "$lazy_ptr:\n"; - O << ".indirect_symbol " << *i << "\n"; - O << ".long dyld_stub_binding_helper\n"; + O << "\t.indirect_symbol " << *i << "\n"; + O << "\t.long dyld_stub_binding_helper\n"; } + O << "\n"; + + // Output stubs for external global variables + if (GVStubs.begin() != GVStubs.end()) + O << ".data\n.non_lazy_symbol_pointer\n"; + for (std::set::iterator i = GVStubs.begin(), e = GVStubs.end(); + i != e; ++i) { + O << "L" << *i << "$non_lazy_ptr:\n"; + O << "\t.indirect_symbol " << *i << "\n"; + O << "\t.long\t0\n"; + } + delete Mang; return false; // success }