//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#define DEBUG_TYPE "asmprinter"
#include "PPC.h"
+#include "PPCPredicates.h"
#include "PPCTargetMachine.h"
#include "PPCSubtarget.h"
+#include "llvm/Analysis/DebugInfo.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
#include "llvm/Assembly/Writer.h"
#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/DwarfWriter.h"
-#include "llvm/CodeGen/MachineDebugInfo.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
-#include "llvm/Support/Mangler.h"
-#include "llvm/Support/MathExtras.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/MachineModuleInfoImpls.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCSectionMachO.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/Target/Mangler.h"
+#include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/Target/TargetInstrInfo.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/Target/TargetRegistry.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
-#include "llvm/Target/MRegisterInfo.h"
-#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/ADT/Statistic.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/StringExtras.h"
-#include <set>
+#include "llvm/ADT/StringSet.h"
+#include "llvm/ADT/SmallString.h"
+#include "InstPrinter/PPCInstPrinter.h"
using namespace llvm;
namespace {
- Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed");
-
class PPCAsmPrinter : public AsmPrinter {
+ protected:
+ DenseMap<MCSymbol*, MCSymbol*> TOC;
+ const PPCSubtarget &Subtarget;
+ uint64_t TOCLabelID;
public:
- std::set<std::string> FnStubs, GVStubs;
-
- PPCAsmPrinter(std::ostream &O, TargetMachine &TM)
- : AsmPrinter(O, TM) {}
+ explicit PPCAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
+ : AsmPrinter(TM, Streamer),
+ Subtarget(TM.getSubtarget<PPCSubtarget>()), TOCLabelID(0) {}
virtual const char *getPassName() const {
return "PowerPC Assembly Printer";
}
- PPCTargetMachine &getTM() {
- return static_cast<PPCTargetMachine&>(TM);
- }
- unsigned enumRegToMachineReg(unsigned enumReg) {
- switch (enumReg) {
- default: assert(0 && "Unhandled register!"); break;
- case PPC::CR0: return 0;
- case PPC::CR1: return 1;
- case PPC::CR2: return 2;
- case PPC::CR3: return 3;
- case PPC::CR4: return 4;
- case PPC::CR5: return 5;
- case PPC::CR6: return 6;
- case PPC::CR7: return 7;
- }
- abort();
- }
+ virtual void EmitInstruction(const MachineInstr *MI);
- /// printInstruction - This method is automatically generated by tablegen
- /// from the instruction set description. This method returns true if the
- /// machine instruction was sufficiently described to print it, otherwise it
- /// returns false.
- bool printInstruction(const MachineInstr *MI);
-
- void printMachineInstruction(const MachineInstr *MI);
- void printOp(const MachineOperand &MO);
-
- void printOperand(const MachineInstr *MI, unsigned OpNo){
- const MachineOperand &MO = MI->getOperand(OpNo);
- if (MO.getType() == MachineOperand::MO_MachineRegister) {
- assert(MRegisterInfo::isPhysicalRegister(MO.getReg())&&"Not physreg??");
- O << TM.getRegisterInfo()->get(MO.getReg()).Name;
- } else if (MO.isImmediate()) {
- O << MO.getImmedValue();
- } else {
- printOp(MO);
- }
- }
+ void printOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O);
- void printU5ImmOperand(const MachineInstr *MI, unsigned OpNo) {
- unsigned char value = MI->getOperand(OpNo).getImmedValue();
- assert(value <= 31 && "Invalid u5imm argument!");
- O << (unsigned int)value;
- }
- void printU6ImmOperand(const MachineInstr *MI, unsigned OpNo) {
- unsigned char value = MI->getOperand(OpNo).getImmedValue();
- assert(value <= 63 && "Invalid u6imm argument!");
- O << (unsigned int)value;
- }
- void printS16ImmOperand(const MachineInstr *MI, unsigned OpNo) {
- O << (short)MI->getOperand(OpNo).getImmedValue();
- }
- void printU16ImmOperand(const MachineInstr *MI, unsigned OpNo) {
- O << (unsigned short)MI->getOperand(OpNo).getImmedValue();
- }
- void printS16X4ImmOperand(const MachineInstr *MI, unsigned OpNo) {
- O << (short)MI->getOperand(OpNo).getImmedValue()*4;
- }
- void printBranchOperand(const MachineInstr *MI, unsigned 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();
- } else {
- printOp(MI->getOperand(OpNo));
- }
- }
- void printCallOperand(const MachineInstr *MI, unsigned OpNo) {
- const MachineOperand &MO = MI->getOperand(OpNo);
- if (!PPCGenerateStaticCode) {
- if (MO.getType() == MachineOperand::MO_GlobalAddress) {
- GlobalValue *GV = MO.getGlobal();
- if (((GV->isExternal() || GV->hasWeakLinkage() ||
- GV->hasLinkOnceLinkage()))) {
- // Dynamically-resolved functions need a stub for the function.
- std::string Name = Mang->getValueName(GV);
- FnStubs.insert(Name);
- O << "L" << Name << "$stub";
- return;
- }
- }
- if (MO.getType() == MachineOperand::MO_ExternalSymbol) {
- std::string Name(GlobalPrefix); Name += MO.getSymbolName();
- FnStubs.insert(Name);
- O << "L" << Name << "$stub";
- return;
- }
- }
-
- printOp(MI->getOperand(OpNo));
- }
- void printAbsAddrOperand(const MachineInstr *MI, unsigned OpNo) {
- O << (int)MI->getOperand(OpNo).getImmedValue()*4;
- }
- void printPICLabel(const MachineInstr *MI, unsigned OpNo) {
- O << "\"L" << getFunctionNumber() << "$pb\"\n";
- O << "\"L" << getFunctionNumber() << "$pb\":";
- }
- void printSymbolHi(const MachineInstr *MI, unsigned OpNo) {
- if (MI->getOperand(OpNo).isImmediate()) {
- printS16ImmOperand(MI, OpNo);
- } else {
- O << "ha16(";
- printOp(MI->getOperand(OpNo));
- if (PICEnabled)
- O << "-\"L" << getFunctionNumber() << "$pb\")";
- else
- O << ')';
- }
- }
- void printSymbolLo(const MachineInstr *MI, unsigned OpNo) {
- if (MI->getOperand(OpNo).isImmediate()) {
- printS16ImmOperand(MI, OpNo);
- } else {
- O << "lo16(";
- printOp(MI->getOperand(OpNo));
- if (PICEnabled)
- O << "-\"L" << getFunctionNumber() << "$pb\")";
- else
- O << ')';
- }
- }
- void printcrbitm(const MachineInstr *MI, unsigned OpNo) {
- unsigned CCReg = MI->getOperand(OpNo).getReg();
- unsigned RegNo = enumRegToMachineReg(CCReg);
- O << (0x80 >> RegNo);
- }
- // The new addressing mode printers, currently empty
- void printMemRegImm(const MachineInstr *MI, unsigned OpNo) {
- printSymbolLo(MI, OpNo);
- O << '(';
- printOperand(MI, OpNo+1);
- O << ')';
- }
- void printMemRegReg(const MachineInstr *MI, unsigned OpNo) {
- // When used as the base register, r0 reads constant zero rather than
- // the value contained in the register. For this reason, the darwin
- // assembler requires that we print r0 as 0 (no r) when used as the base.
- const MachineOperand &MO = MI->getOperand(OpNo);
- if (MO.getReg() == PPC::R0)
- O << '0';
- else
- O << TM.getRegisterInfo()->get(MO.getReg()).Name;
- O << ", ";
- printOperand(MI, OpNo+1);
- }
-
- virtual bool runOnMachineFunction(MachineFunction &F) = 0;
- virtual bool doFinalization(Module &M) = 0;
- };
+ bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant, const char *ExtraCode,
+ raw_ostream &O);
+ bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant, const char *ExtraCode,
+ raw_ostream &O);
- /// DarwinDwarfWriter - Dwarf debug info writer customized for Darwin/Mac OS X
- ///
- struct DarwinDwarfWriter : public DwarfWriter {
- // Ctor.
- DarwinDwarfWriter(std::ostream &o, AsmPrinter *ap, MachineDebugInfo &di)
- : DwarfWriter(o, ap, di)
- {
- hasLEB128 = false;
- needsSet = true;
- DwarfAbbrevSection = ".section __DWARFA,__debug_abbrev,regular,debug";
- DwarfInfoSection = ".section __DWARFA,__debug_info,regular,debug";
- DwarfLineSection = ".section __DWARFA,__debug_line,regular,debug";
+ MachineLocation getDebugValueLocation(const MachineInstr *MI) const {
+ MachineLocation Location;
+ assert(MI->getNumOperands() == 4 && "Invalid no. of machine operands!");
+ // Frame address. Currently handles register +- offset only.
+ if (MI->getOperand(0).isReg() && MI->getOperand(2).isImm())
+ Location.set(MI->getOperand(0).getReg(), MI->getOperand(2).getImm());
+ else {
+ DEBUG(dbgs() << "DBG_VALUE instruction ignored! " << *MI << "\n");
+ }
+ return Location;
}
};
- /// DarwinAsmPrinter - PowerPC assembly printer, customized for Darwin/Mac OS
- /// X
- ///
- struct DarwinAsmPrinter : public PPCAsmPrinter {
-
- DarwinDwarfWriter DW;
-
- DarwinAsmPrinter(std::ostream &O, TargetMachine &TM)
- : PPCAsmPrinter(O, TM),
- // FIXME - MachineDebugInfo needs a proper location
- DW(O, this, getMachineDebugInfo())
- {
- CommentString = ";";
- GlobalPrefix = "_";
- PrivateGlobalPrefix = "L"; // Marker for constant pool idxs
- 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.
- ConstantPoolSection = "\t.const\t";
- LCOMMDirective = "\t.lcomm\t";
- StaticCtorsSection = ".mod_init_func";
- StaticDtorsSection = ".mod_term_func";
- }
+ /// PPCLinuxAsmPrinter - PowerPC assembly printer, customized for Linux
+ class PPCLinuxAsmPrinter : public PPCAsmPrinter {
+ public:
+ explicit PPCLinuxAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
+ : PPCAsmPrinter(TM, Streamer) {}
virtual const char *getPassName() const {
- return "Darwin PPC Assembly Printer";
+ return "Linux PPC Assembly Printer";
}
-
- bool runOnMachineFunction(MachineFunction &F);
- bool doInitialization(Module &M);
+
bool doFinalization(Module &M);
+
+ virtual void EmitFunctionEntryLabel();
};
- /// AIXAsmPrinter - PowerPC assembly printer, customized for AIX
- ///
- struct AIXAsmPrinter : public PPCAsmPrinter {
- /// Map for labels corresponding to global variables
- ///
- std::map<const GlobalVariable*,std::string> GVToLabelMap;
-
- AIXAsmPrinter(std::ostream &O, TargetMachine &TM)
- : PPCAsmPrinter(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.
- ConstantPoolSection = "\t.const\t";
- }
+ /// PPCDarwinAsmPrinter - PowerPC assembly printer, customized for Darwin/Mac
+ /// OS X
+ class PPCDarwinAsmPrinter : public PPCAsmPrinter {
+ public:
+ explicit PPCDarwinAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
+ : PPCAsmPrinter(TM, Streamer) {}
virtual const char *getPassName() const {
- return "AIX PPC Assembly Printer";
+ return "Darwin PPC Assembly Printer";
}
- bool runOnMachineFunction(MachineFunction &F);
- bool doInitialization(Module &M);
bool doFinalization(Module &M);
+ void EmitStartOfAsmFile(Module &M);
+
+ void EmitFunctionStubs(const MachineModuleInfoMachO::SymbolListTy &Stubs);
};
} // end of anonymous namespace
-/// 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);
+/// stripRegisterPrefix - This method strips the character prefix from a
+/// register name so that only the number is left. Used by for linux asm.
+static const char *stripRegisterPrefix(const char *RegName) {
+ switch (RegName[0]) {
+ case 'r':
+ case 'f':
+ case 'v': return RegName + 1;
+ case 'c': if (RegName[1] == 'r') return RegName + 2;
+ }
+
+ return RegName;
}
-// Include the auto-generated portion of the assembly writer
-#include "PPCGenAsmWriter.inc"
-
-void PPCAsmPrinter::printOp(const MachineOperand &MO) {
- const MRegisterInfo &RI = *TM.getRegisterInfo();
- int new_symbol;
-
+void PPCAsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
+ raw_ostream &O) {
+ const MachineOperand &MO = MI->getOperand(OpNo);
+
switch (MO.getType()) {
- case MachineOperand::MO_VirtualRegister:
- if (Value *V = MO.getVRegValueOrNull()) {
- O << "<" << V->getName() << ">";
- return;
- }
- // FALLTHROUGH
- case MachineOperand::MO_MachineRegister:
- case MachineOperand::MO_CCRegister:
- O << RI.get(MO.getReg()).Name;
+ case MachineOperand::MO_Register: {
+ const char *RegName = PPCInstPrinter::getRegisterName(MO.getReg());
+ // Linux assembler (Others?) does not take register mnemonics.
+ // FIXME - What about special registers used in mfspr/mtspr?
+ if (!Subtarget.isDarwin()) RegName = stripRegisterPrefix(RegName);
+ O << RegName;
return;
-
- case MachineOperand::MO_SignExtendedImmed:
- case MachineOperand::MO_UnextendedImmed:
- std::cerr << "printOp() does not handle immediate values\n";
- abort();
+ }
+ case MachineOperand::MO_Immediate:
+ O << MO.getImm();
return;
- case MachineOperand::MO_PCRelativeDisp:
- std::cerr << "Shouldn't use addPCDisp() when building PPC MachineInstrs";
- abort();
+ case MachineOperand::MO_MachineBasicBlock:
+ O << *MO.getMBB()->getSymbol();
return;
-
- case MachineOperand::MO_MachineBasicBlock: {
- MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
- O << PrivateGlobalPrefix << "BB" << getFunctionNumber() << "_"
- << MBBOp->getNumber() << "\t; " << MBBOp->getBasicBlock()->getName();
+ case MachineOperand::MO_JumpTableIndex:
+ O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
+ << '_' << MO.getIndex();
+ // FIXME: PIC relocation model
return;
- }
-
case MachineOperand::MO_ConstantPoolIndex:
- O << PrivateGlobalPrefix << "CPI" << getFunctionNumber()
- << '_' << MO.getConstantPoolIndex();
+ O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber()
+ << '_' << MO.getIndex();
+ return;
+ case MachineOperand::MO_BlockAddress:
+ O << *GetBlockAddressSymbol(MO.getBlockAddress());
return;
- case MachineOperand::MO_ExternalSymbol:
+ case MachineOperand::MO_ExternalSymbol: {
// Computing the address of an external symbol, not calling it.
- if (!PPCGenerateStaticCode) {
- std::string Name(GlobalPrefix); Name += MO.getSymbolName();
- GVStubs.insert(Name);
- O << "L" << Name << "$non_lazy_ptr";
+ if (TM.getRelocationModel() == Reloc::Static) {
+ O << *GetExternalSymbolSymbol(MO.getSymbolName());
return;
}
- O << GlobalPrefix << MO.getSymbolName();
+
+ MCSymbol *NLPSym =
+ OutContext.GetOrCreateSymbol(StringRef(MAI->getGlobalPrefix())+
+ MO.getSymbolName()+"$non_lazy_ptr");
+ MachineModuleInfoImpl::StubValueTy &StubSym =
+ MMI->getObjFileInfo<MachineModuleInfoMachO>().getGVStubEntry(NLPSym);
+ if (StubSym.getPointer() == 0)
+ StubSym = MachineModuleInfoImpl::
+ StubValueTy(GetExternalSymbolSymbol(MO.getSymbolName()), true);
+
+ O << *NLPSym;
return;
+ }
case MachineOperand::MO_GlobalAddress: {
// Computing the address of a global symbol, not calling it.
- GlobalValue *GV = MO.getGlobal();
- std::string Name = Mang->getValueName(GV);
- int offset = MO.getOffset();
+ const GlobalValue *GV = MO.getGlobal();
+ MCSymbol *SymToPrint;
// External or weakly linked global variables need non-lazily-resolved stubs
- if (!PPCGenerateStaticCode) {
- if (((GV->isExternal() || GV->hasWeakLinkage() ||
- GV->hasLinkOnceLinkage()))) {
- GVStubs.insert(Name);
- O << "L" << Name << "$non_lazy_ptr";
- return;
+ if (TM.getRelocationModel() != Reloc::Static &&
+ (GV->isDeclaration() || GV->isWeakForLinker())) {
+ if (!GV->hasHiddenVisibility()) {
+ SymToPrint = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
+ MachineModuleInfoImpl::StubValueTy &StubSym =
+ MMI->getObjFileInfo<MachineModuleInfoMachO>()
+ .getGVStubEntry(SymToPrint);
+ if (StubSym.getPointer() == 0)
+ StubSym = MachineModuleInfoImpl::
+ StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
+ } else if (GV->isDeclaration() || GV->hasCommonLinkage() ||
+ GV->hasAvailableExternallyLinkage()) {
+ SymToPrint = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
+
+ MachineModuleInfoImpl::StubValueTy &StubSym =
+ MMI->getObjFileInfo<MachineModuleInfoMachO>().
+ getHiddenGVStubEntry(SymToPrint);
+ if (StubSym.getPointer() == 0)
+ StubSym = MachineModuleInfoImpl::
+ StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
+ } else {
+ SymToPrint = Mang->getSymbol(GV);
}
+ } else {
+ SymToPrint = Mang->getSymbol(GV);
}
+
+ O << *SymToPrint;
- O << Name;
+ printOffset(MO.getOffset(), O);
return;
}
}
}
-/// printMachineInstruction -- Print out a single PowerPC MI in Darwin syntax to
-/// the current output stream.
+/// PrintAsmOperand - Print out an operand for an inline asm expression.
///
-void PPCAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
- ++EmittedInsts;
-
- // Check for slwi/srwi mnemonics.
- if (MI->getOpcode() == PPC::RLWINM) {
- bool FoundMnemonic = false;
- unsigned char SH = MI->getOperand(2).getImmedValue();
- unsigned char MB = MI->getOperand(3).getImmedValue();
- unsigned char ME = MI->getOperand(4).getImmedValue();
- if (SH <= 31 && MB == 0 && ME == (31-SH)) {
- O << "slwi "; FoundMnemonic = true;
- }
- if (SH <= 31 && MB == (32-SH) && ME == 31) {
- O << "srwi "; FoundMnemonic = true;
- SH = 32-SH;
- }
- if (FoundMnemonic) {
- printOperand(MI, 0);
- O << ", ";
- printOperand(MI, 1);
- O << ", " << (unsigned int)SH << "\n";
- return;
+bool PPCAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant,
+ const char *ExtraCode, raw_ostream &O) {
+ // Does this asm operand have a single letter operand modifier?
+ if (ExtraCode && ExtraCode[0]) {
+ if (ExtraCode[1] != 0) return true; // Unknown modifier.
+
+ switch (ExtraCode[0]) {
+ default: return true; // Unknown modifier.
+ case 'c': // Don't print "$" before a global var name or constant.
+ break; // PPC never has a prefix.
+ case 'L': // Write second word of DImode reference.
+ // Verify that this operand has two consecutive registers.
+ if (!MI->getOperand(OpNo).isReg() ||
+ OpNo+1 == MI->getNumOperands() ||
+ !MI->getOperand(OpNo+1).isReg())
+ return true;
+ ++OpNo; // Return the high-part.
+ break;
+ case 'I':
+ // Write 'i' if an integer constant, otherwise nothing. Used to print
+ // addi vs add, etc.
+ if (MI->getOperand(OpNo).isImm())
+ O << "i";
+ return false;
}
}
- if (printInstruction(MI))
- return; // Printer was automatically generated
+ printOperand(MI, OpNo, O);
+ return false;
+}
- assert(0 && "Unhandled instruction in asm writer!");
- abort();
- return;
+// At the moment, all inline asm memory operands are a single register.
+// In any case, the output of this routine should always be just one
+// assembler operand.
+
+bool PPCAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant,
+ const char *ExtraCode,
+ raw_ostream &O) {
+ if (ExtraCode && ExtraCode[0])
+ return true; // Unknown modifier.
+ assert(MI->getOperand(OpNo).isReg());
+ O << "0(";
+ printOperand(MI, OpNo, O);
+ O << ")";
+ return false;
}
-/// runOnMachineFunction - This uses the printMachineInstruction()
-/// method to print assembly for each instruction.
+/// EmitInstruction -- Print out a single PowerPC MI in Darwin syntax to
+/// the current output stream.
///
-bool DarwinAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
- SetupMachineFunction(MF);
- O << "\n\n";
+void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
+ MCInst TmpInst;
- // Emit pre-function debug information.
- DW.BeginFunction();
-
- // Print out constants referenced by the function
- EmitConstantPool(MF.getConstantPool());
-
- // Print out labels for the function.
- const Function *F = MF.getFunction();
- switch (F->getLinkage()) {
- default: assert(0 && "Unknown linkage type!");
- case Function::InternalLinkage: // Symbols default to internal.
- SwitchSection(".text", F);
- EmitAlignment(4, F);
- break;
- case Function::ExternalLinkage:
- SwitchSection(".text", F);
- EmitAlignment(4, F);
- O << "\t.globl\t" << CurrentFnName << "\n";
- break;
- case Function::WeakLinkage:
- case Function::LinkOnceLinkage:
- SwitchSection(".section __TEXT,__textcoal_nt,coalesced,pure_instructions",
- F);
- O << "\t.globl\t" << CurrentFnName << "\n";
- O << "\t.weak_definition\t" << CurrentFnName << "\n";
- break;
+ // Lower multi-instruction pseudo operations.
+ switch (MI->getOpcode()) {
+ default: break;
+ case TargetOpcode::DBG_VALUE: {
+ if (!isVerbose() || !OutStreamer.hasRawTextSupport()) return;
+
+ SmallString<32> Str;
+ raw_svector_ostream O(Str);
+ unsigned NOps = MI->getNumOperands();
+ assert(NOps==4);
+ O << '\t' << MAI->getCommentString() << "DEBUG_VALUE: ";
+ // cast away const; DIetc do not take const operands for some reason.
+ DIVariable V(const_cast<MDNode *>(MI->getOperand(NOps-1).getMetadata()));
+ O << V.getName();
+ O << " <- ";
+ // Frame address. Currently handles register +- offset only.
+ assert(MI->getOperand(0).isReg() && MI->getOperand(1).isImm());
+ O << '['; printOperand(MI, 0, O); O << '+'; printOperand(MI, 1, O);
+ O << ']';
+ O << "+";
+ printOperand(MI, NOps-2, O);
+ OutStreamer.EmitRawText(O.str());
+ return;
}
- 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.
- if (I != MF.begin()) {
- O << PrivateGlobalPrefix << "BB" << getFunctionNumber() << '_'
- << I->getNumber() << ":\t";
- if (!I->getBasicBlock()->getName().empty())
- O << CommentString << " " << I->getBasicBlock()->getName();
- O << "\n";
- }
- for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
- II != E; ++II) {
- // Print the assembly for the instruction.
- O << "\t";
- printMachineInstruction(II);
- }
+
+ case PPC::MovePCtoLR:
+ case PPC::MovePCtoLR8: {
+ // Transform %LR = MovePCtoLR
+ // Into this, where the label is the PIC base:
+ // bl L1$pb
+ // L1$pb:
+ MCSymbol *PICBase = MF->getPICBaseSymbol();
+
+ // Emit the 'bl'.
+ TmpInst.setOpcode(PPC::BL_Darwin); // Darwin vs SVR4 doesn't matter here.
+
+
+ // FIXME: We would like an efficient form for this, so we don't have to do
+ // a lot of extra uniquing.
+ TmpInst.addOperand(MCOperand::CreateExpr(MCSymbolRefExpr::
+ Create(PICBase, OutContext)));
+ OutStreamer.EmitInstruction(TmpInst);
+
+ // Emit the label.
+ OutStreamer.EmitLabel(PICBase);
+ return;
+ }
+ case PPC::LDtoc: {
+ // Transform %X3 = LDtoc <ga:@min1>, %X2
+ LowerPPCMachineInstrToMCInst(MI, TmpInst, *this);
+
+ // Change the opcode to LD, and the global address operand to be a
+ // reference to the TOC entry we will synthesize later.
+ TmpInst.setOpcode(PPC::LD);
+ const MachineOperand &MO = MI->getOperand(1);
+ assert(MO.isGlobal());
+
+ // Map symbol -> label of TOC entry.
+ MCSymbol *&TOCEntry = TOC[Mang->getSymbol(MO.getGlobal())];
+ if (TOCEntry == 0)
+ TOCEntry = GetTempSymbol("C", TOCLabelID++);
+
+ const MCExpr *Exp =
+ MCSymbolRefExpr::Create(TOCEntry, MCSymbolRefExpr::VK_PPC_TOC,
+ OutContext);
+ TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
+ OutStreamer.EmitInstruction(TmpInst);
+ return;
+ }
+
+ case PPC::MFCRpseud:
+ // Transform: %R3 = MFCRpseud %CR7
+ // Into: %R3 = MFCR ;; cr7
+ OutStreamer.AddComment(PPCInstPrinter::
+ getRegisterName(MI->getOperand(1).getReg()));
+ TmpInst.setOpcode(PPC::MFCR);
+ TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
+ OutStreamer.EmitInstruction(TmpInst);
+ return;
}
- // Emit post-function debug information.
- DW.EndFunction();
+ LowerPPCMachineInstrToMCInst(MI, TmpInst, *this);
+ OutStreamer.EmitInstruction(TmpInst);
+}
- // We didn't modify anything.
- return false;
+void PPCLinuxAsmPrinter::EmitFunctionEntryLabel() {
+ if (!Subtarget.isPPC64()) // linux/ppc32 - Normal entry label.
+ return AsmPrinter::EmitFunctionEntryLabel();
+
+ // Emit an official procedure descriptor.
+ // FIXME 64-bit SVR4: Use MCSection here!
+ OutStreamer.EmitRawText(StringRef("\t.section\t\".opd\",\"aw\""));
+ OutStreamer.EmitRawText(StringRef("\t.align 3"));
+ OutStreamer.EmitLabel(CurrentFnSym);
+ OutStreamer.EmitRawText("\t.quad .L." + Twine(CurrentFnSym->getName()) +
+ ",.TOC.@tocbase");
+ OutStreamer.EmitRawText(StringRef("\t.previous"));
+ OutStreamer.EmitRawText(".L." + Twine(CurrentFnSym->getName()) + ":");
}
-bool DarwinAsmPrinter::doInitialization(Module &M) {
- if (TM.getSubtarget<PPCSubtarget>().isGigaProcessor())
- O << "\t.machine ppc970\n";
- AsmPrinter::doInitialization(M);
-
- // Darwin wants symbols to be quoted if they have complex names.
- Mang->setUseQuotes(true);
-
- // Emit initial debug information.
- DW.BeginModule();
- return false;
-}
+bool PPCLinuxAsmPrinter::doFinalization(Module &M) {
+ const TargetData *TD = TM.getTargetData();
-bool DarwinAsmPrinter::doFinalization(Module &M) {
- const TargetData &TD = TM.getTargetData();
+ bool isPPC64 = TD->getPointerSizeInBits() == 64;
- // Print out module-level global variables here.
- for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
- I != E; ++I) {
- if (!I->hasInitializer()) continue; // External global require no code
-
- // Check to see if this is a special global used by LLVM, if so, emit it.
- if (I->hasAppendingLinkage() && EmitSpecialLLVMGlobal(I))
- continue;
-
- O << '\n';
- std::string name = Mang->getValueName(I);
- Constant *C = I->getInitializer();
- unsigned Size = TD.getTypeSize(C->getType());
- unsigned Align = TD.getTypeAlignmentShift(C->getType());
-
- if (C->isNullValue() && /* FIXME: Verify correct */
- (I->hasInternalLinkage() || I->hasWeakLinkage() ||
- I->hasLinkOnceLinkage())) {
- SwitchSection(".data", I);
- if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
- if (I->hasInternalLinkage())
- O << LCOMMDirective << name << "," << Size << "," << Align;
- else
- O << ".comm " << name << "," << Size;
- O << "\t\t; '" << I->getName() << "'\n";
- } else {
- switch (I->getLinkage()) {
- case GlobalValue::LinkOnceLinkage:
- case GlobalValue::WeakLinkage:
- O << "\t.globl " << name << '\n'
- << "\t.weak_definition " << name << '\n';
- SwitchSection(".section __DATA,__datacoal_nt,coalesced", I);
- 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.
- case GlobalValue::ExternalLinkage:
- // If external or appending, declare as a global symbol
- O << "\t.globl " << name << "\n";
- // FALL THROUGH
- case GlobalValue::InternalLinkage:
- SwitchSection(".data", I);
- break;
- default:
- std::cerr << "Unknown linkage type!";
- abort();
- }
+ if (isPPC64 && !TOC.empty()) {
+ // FIXME 64-bit SVR4: Use MCSection here?
+ OutStreamer.EmitRawText(StringRef("\t.section\t\".toc\",\"aw\""));
- EmitAlignment(Align, I);
- O << name << ":\t\t\t\t; '" << I->getName() << "'\n";
- EmitGlobalConstant(C);
+ // FIXME: This is nondeterminstic!
+ for (DenseMap<MCSymbol*, MCSymbol*>::iterator I = TOC.begin(),
+ E = TOC.end(); I != E; ++I) {
+ OutStreamer.EmitLabel(I->second);
+ OutStreamer.EmitRawText("\t.tc " + Twine(I->first->getName()) +
+ "[TC]," + I->first->getName());
}
}
+ return AsmPrinter::doFinalization(M);
+}
+
+void PPCDarwinAsmPrinter::EmitStartOfAsmFile(Module &M) {
+ static const char *const CPUDirectives[] = {
+ "",
+ "ppc",
+ "ppc601",
+ "ppc602",
+ "ppc603",
+ "ppc7400",
+ "ppc750",
+ "ppc970",
+ "ppc64"
+ };
+
+ unsigned Directive = Subtarget.getDarwinDirective();
+ if (Subtarget.isGigaProcessor() && Directive < PPC::DIR_970)
+ Directive = PPC::DIR_970;
+ if (Subtarget.hasAltivec() && Directive < PPC::DIR_7400)
+ Directive = PPC::DIR_7400;
+ if (Subtarget.isPPC64() && Directive < PPC::DIR_970)
+ Directive = PPC::DIR_64;
+ assert(Directive <= PPC::DIR_64 && "Directive out of range.");
+
+ // FIXME: This is a total hack, finish mc'izing the PPC backend.
+ if (OutStreamer.hasRawTextSupport())
+ OutStreamer.EmitRawText("\t.machine " + Twine(CPUDirectives[Directive]));
+
+ // Prime text sections so they are adjacent. This reduces the likelihood a
+ // large data or debug section causes a branch to exceed 16M limit.
+ const TargetLoweringObjectFileMachO &TLOFMacho =
+ static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
+ OutStreamer.SwitchSection(TLOFMacho.getTextCoalSection());
+ if (TM.getRelocationModel() == Reloc::PIC_) {
+ OutStreamer.SwitchSection(
+ OutContext.getMachOSection("__TEXT", "__picsymbolstub1",
+ MCSectionMachO::S_SYMBOL_STUBS |
+ MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
+ 32, SectionKind::getText()));
+ } else if (TM.getRelocationModel() == Reloc::DynamicNoPIC) {
+ OutStreamer.SwitchSection(
+ OutContext.getMachOSection("__TEXT","__symbol_stub1",
+ MCSectionMachO::S_SYMBOL_STUBS |
+ MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
+ 16, SectionKind::getText()));
+ }
+ OutStreamer.SwitchSection(getObjFileLowering().getTextSection());
+}
+
+static MCSymbol *GetLazyPtr(MCSymbol *Sym, MCContext &Ctx) {
+ // Remove $stub suffix, add $lazy_ptr.
+ SmallString<128> TmpStr(Sym->getName().begin(), Sym->getName().end()-5);
+ TmpStr += "$lazy_ptr";
+ return Ctx.GetOrCreateSymbol(TmpStr.str());
+}
+
+static MCSymbol *GetAnonSym(MCSymbol *Sym, MCContext &Ctx) {
+ // Add $tmp suffix to $stub, yielding $stub$tmp.
+ SmallString<128> TmpStr(Sym->getName().begin(), Sym->getName().end());
+ TmpStr += "$tmp";
+ return Ctx.GetOrCreateSymbol(TmpStr.str());
+}
+
+void PPCDarwinAsmPrinter::
+EmitFunctionStubs(const MachineModuleInfoMachO::SymbolListTy &Stubs) {
+ bool isPPC64 = TM.getTargetData()->getPointerSizeInBits() == 64;
+
+ const TargetLoweringObjectFileMachO &TLOFMacho =
+ static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
+
+ // .lazy_symbol_pointer
+ const MCSection *LSPSection = TLOFMacho.getLazySymbolPointerSection();
+
// Output stubs for dynamically-linked functions
- if (PICEnabled) {
- for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
- i != e; ++i) {
- SwitchSection(".section __TEXT,__picsymbolstub1,symbol_stubs,"
- "pure_instructions,32", 0);
- EmitAlignment(2);
- O << "L" << *i << "$stub:\n";
- O << "\t.indirect_symbol " << *i << "\n";
- O << "\tmflr r0\n";
- O << "\tbcl 20,31,L0$" << *i << "\n";
- O << "L0$" << *i << ":\n";
- O << "\tmflr r11\n";
- O << "\taddis r11,r11,ha16(L" << *i << "$lazy_ptr-L0$" << *i << ")\n";
- O << "\tmtlr r0\n";
- O << "\tlwzu r12,lo16(L" << *i << "$lazy_ptr-L0$" << *i << ")(r11)\n";
- O << "\tmtctr r12\n";
- O << "\tbctr\n";
- SwitchSection(".lazy_symbol_pointer", 0);
- O << "L" << *i << "$lazy_ptr:\n";
- O << "\t.indirect_symbol " << *i << "\n";
- O << "\t.long dyld_stub_binding_helper\n";
- }
- } else {
- for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
- i != e; ++i) {
- SwitchSection(".section __TEXT,__symbol_stub1,symbol_stubs,"
- "pure_instructions,16", 0);
+ if (TM.getRelocationModel() == Reloc::PIC_) {
+ const MCSection *StubSection =
+ OutContext.getMachOSection("__TEXT", "__picsymbolstub1",
+ MCSectionMachO::S_SYMBOL_STUBS |
+ MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
+ 32, SectionKind::getText());
+ for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
+ OutStreamer.SwitchSection(StubSection);
EmitAlignment(4);
- O << "L" << *i << "$stub:\n";
- O << "\t.indirect_symbol " << *i << "\n";
- O << "\tlis r11,ha16(L" << *i << "$lazy_ptr)\n";
- O << "\tlwzu r12,lo16(L" << *i << "$lazy_ptr)(r11)\n";
- O << "\tmtctr r12\n";
- O << "\tbctr\n";
- SwitchSection(".lazy_symbol_pointer", 0);
- O << "L" << *i << "$lazy_ptr:\n";
- O << "\t.indirect_symbol " << *i << "\n";
- O << "\t.long dyld_stub_binding_helper\n";
+
+ MCSymbol *Stub = Stubs[i].first;
+ MCSymbol *RawSym = Stubs[i].second.getPointer();
+ MCSymbol *LazyPtr = GetLazyPtr(Stub, OutContext);
+ MCSymbol *AnonSymbol = GetAnonSym(Stub, OutContext);
+
+ OutStreamer.EmitLabel(Stub);
+ OutStreamer.EmitSymbolAttribute(RawSym, MCSA_IndirectSymbol);
+ // FIXME: MCize this.
+ OutStreamer.EmitRawText(StringRef("\tmflr r0"));
+ OutStreamer.EmitRawText("\tbcl 20,31," + Twine(AnonSymbol->getName()));
+ OutStreamer.EmitLabel(AnonSymbol);
+ OutStreamer.EmitRawText(StringRef("\tmflr r11"));
+ OutStreamer.EmitRawText("\taddis r11,r11,ha16("+Twine(LazyPtr->getName())+
+ "-" + AnonSymbol->getName() + ")");
+ OutStreamer.EmitRawText(StringRef("\tmtlr r0"));
+
+ if (isPPC64)
+ OutStreamer.EmitRawText("\tldu r12,lo16(" + Twine(LazyPtr->getName()) +
+ "-" + AnonSymbol->getName() + ")(r11)");
+ else
+ OutStreamer.EmitRawText("\tlwzu r12,lo16(" + Twine(LazyPtr->getName()) +
+ "-" + AnonSymbol->getName() + ")(r11)");
+ OutStreamer.EmitRawText(StringRef("\tmtctr r12"));
+ OutStreamer.EmitRawText(StringRef("\tbctr"));
+
+ OutStreamer.SwitchSection(LSPSection);
+ OutStreamer.EmitLabel(LazyPtr);
+ OutStreamer.EmitSymbolAttribute(RawSym, MCSA_IndirectSymbol);
+
+ if (isPPC64)
+ OutStreamer.EmitRawText(StringRef("\t.quad dyld_stub_binding_helper"));
+ else
+ OutStreamer.EmitRawText(StringRef("\t.long dyld_stub_binding_helper"));
}
+ OutStreamer.AddBlankLine();
+ return;
}
+
+ const MCSection *StubSection =
+ OutContext.getMachOSection("__TEXT","__symbol_stub1",
+ MCSectionMachO::S_SYMBOL_STUBS |
+ MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
+ 16, SectionKind::getText());
+ for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
+ MCSymbol *Stub = Stubs[i].first;
+ MCSymbol *RawSym = Stubs[i].second.getPointer();
+ MCSymbol *LazyPtr = GetLazyPtr(Stub, OutContext);
+
+ OutStreamer.SwitchSection(StubSection);
+ EmitAlignment(4);
+ OutStreamer.EmitLabel(Stub);
+ OutStreamer.EmitSymbolAttribute(RawSym, MCSA_IndirectSymbol);
+ OutStreamer.EmitRawText("\tlis r11,ha16(" + Twine(LazyPtr->getName()) +")");
+ if (isPPC64)
+ OutStreamer.EmitRawText("\tldu r12,lo16(" + Twine(LazyPtr->getName()) +
+ ")(r11)");
+ else
+ OutStreamer.EmitRawText("\tlwzu r12,lo16(" + Twine(LazyPtr->getName()) +
+ ")(r11)");
+ OutStreamer.EmitRawText(StringRef("\tmtctr r12"));
+ OutStreamer.EmitRawText(StringRef("\tbctr"));
+ OutStreamer.SwitchSection(LSPSection);
+ OutStreamer.EmitLabel(LazyPtr);
+ OutStreamer.EmitSymbolAttribute(RawSym, MCSA_IndirectSymbol);
+
+ if (isPPC64)
+ OutStreamer.EmitRawText(StringRef("\t.quad dyld_stub_binding_helper"));
+ else
+ OutStreamer.EmitRawText(StringRef("\t.long dyld_stub_binding_helper"));
+ }
+
+ OutStreamer.AddBlankLine();
+}
- O << "\n";
- // Output stubs for external and common global variables.
- if (GVStubs.begin() != GVStubs.end()) {
- SwitchSection(".non_lazy_symbol_pointer", 0);
- 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";
+bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
+ bool isPPC64 = TM.getTargetData()->getPointerSizeInBits() == 64;
+
+ // Darwin/PPC always uses mach-o.
+ const TargetLoweringObjectFileMachO &TLOFMacho =
+ static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
+ MachineModuleInfoMachO &MMIMacho =
+ MMI->getObjFileInfo<MachineModuleInfoMachO>();
+
+ MachineModuleInfoMachO::SymbolListTy Stubs = MMIMacho.GetFnStubList();
+ if (!Stubs.empty())
+ EmitFunctionStubs(Stubs);
+
+ if (MAI->doesSupportExceptionHandling() && MMI) {
+ // Add the (possibly multiple) personalities to the set of global values.
+ // Only referenced functions get into the Personalities list.
+ const std::vector<const Function*> &Personalities = MMI->getPersonalities();
+ for (std::vector<const Function*>::const_iterator I = Personalities.begin(),
+ E = Personalities.end(); I != E; ++I) {
+ if (*I) {
+ MCSymbol *NLPSym = GetSymbolWithGlobalValueBase(*I, "$non_lazy_ptr");
+ MachineModuleInfoImpl::StubValueTy &StubSym =
+ MMIMacho.getGVStubEntry(NLPSym);
+ StubSym = MachineModuleInfoImpl::StubValueTy(Mang->getSymbol(*I), true);
+ }
}
}
+ // Output stubs for dynamically-linked functions.
+ Stubs = MMIMacho.GetGVStubList();
+
+ // Output macho stubs for external and common global variables.
+ if (!Stubs.empty()) {
+ // Switch with ".non_lazy_symbol_pointer" directive.
+ OutStreamer.SwitchSection(TLOFMacho.getNonLazySymbolPointerSection());
+ EmitAlignment(isPPC64 ? 3 : 2);
+
+ for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
+ // L_foo$stub:
+ OutStreamer.EmitLabel(Stubs[i].first);
+ // .indirect_symbol _foo
+ MachineModuleInfoImpl::StubValueTy &MCSym = Stubs[i].second;
+ OutStreamer.EmitSymbolAttribute(MCSym.getPointer(), MCSA_IndirectSymbol);
+
+ if (MCSym.getInt())
+ // External to current translation unit.
+ OutStreamer.EmitIntValue(0, isPPC64 ? 8 : 4/*size*/, 0/*addrspace*/);
+ else
+ // Internal to current translation unit.
+ //
+ // When we place the LSDA into the TEXT section, the type info pointers
+ // need to be indirect and pc-rel. We accomplish this by using NLPs.
+ // However, sometimes the types are local to the file. So we need to
+ // fill in the value for the NLP in those cases.
+ OutStreamer.EmitValue(MCSymbolRefExpr::Create(MCSym.getPointer(),
+ OutContext),
+ isPPC64 ? 8 : 4/*size*/, 0/*addrspace*/);
+ }
+
+ Stubs.clear();
+ OutStreamer.AddBlankLine();
+ }
+
+ Stubs = MMIMacho.GetHiddenGVStubList();
+ if (!Stubs.empty()) {
+ OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
+ EmitAlignment(isPPC64 ? 3 : 2);
+
+ for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
+ // L_foo$stub:
+ OutStreamer.EmitLabel(Stubs[i].first);
+ // .long _foo
+ OutStreamer.EmitValue(MCSymbolRefExpr::
+ Create(Stubs[i].second.getPointer(),
+ OutContext),
+ isPPC64 ? 8 : 4/*size*/, 0/*addrspace*/);
+ }
+
+ Stubs.clear();
+ OutStreamer.AddBlankLine();
+ }
+
// Funny Darwin hack: This flag tells the linker that no global symbols
// contain code that falls through to other global symbols (e.g. the obvious
// implementation of multiple entry points). If this doesn't occur, the
// linker can safely perform dead code stripping. Since LLVM never generates
// code that does this, it is always safe to set.
- O << "\t.subsections_via_symbols\n";
-
- // Emit initial debug information.
- DW.EndModule();
+ OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
- AsmPrinter::doFinalization(M);
- return false; // success
+ return AsmPrinter::doFinalization(M);
}
-/// runOnMachineFunction - This uses the printMachineInstruction()
-/// method to print assembly for each instruction.
+/// createPPCAsmPrinterPass - 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.
///
-bool AIXAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
- SetupMachineFunction(MF);
-
- // Print out constants referenced by the function
- EmitConstantPool(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 << PrivateGlobalPrefix << "BB" << getFunctionNumber() << '_'
- << 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);
- }
- }
+static AsmPrinter *createPPCAsmPrinterPass(TargetMachine &tm,
+ MCStreamer &Streamer) {
+ const PPCSubtarget *Subtarget = &tm.getSubtarget<PPCSubtarget>();
- 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;
+ if (Subtarget->isDarwin())
+ return new PPCDarwinAsmPrinter(tm, Streamer);
+ return new PPCLinuxAsmPrinter(tm, Streamer);
}
-bool AIXAsmPrinter::doInitialization(Module &M) {
- SwitchSection("", 0);
- const TargetData &TD = TM.getTargetData();
-
- O << "\t.machine \"ppc64\"\n"
- << "\t.toc\n"
- << "\t.csect .text[PR]\n";
-
- // Print out module-level global variables
- for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
- 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.global_begin() != M.global_end()) O << "\t.toc\n";
- for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
- I != E; ++I) {
- const GlobalVariable *GV = I;
- // Do not output labels for unused variables
- if (GV->isExternal() && GV->use_begin() == GV->use_end())
- continue;
-
- IncrementFunctionNumber();
- std::string Name = GV->getName();
- std::string Label = "LC.." + utostr(getFunctionNumber());
- GVToLabelMap[GV] = Label;
- O << Label << ":\n"
- << "\t.tc " << Name << "[TC]," << Name;
- if (GV->isExternal()) O << "[RW]";
- O << '\n';
- }
-
- AsmPrinter::doInitialization(M);
- return false; // success
+static MCInstPrinter *createPPCMCInstPrinter(const Target &T,
+ TargetMachine &TM,
+ unsigned SyntaxVariant,
+ const MCAsmInfo &MAI) {
+ return new PPCInstPrinter(TM, MAI, SyntaxVariant);
}
-bool AIXAsmPrinter::doFinalization(Module &M) {
- const TargetData &TD = TM.getTargetData();
- // Print out module-level global variables
- for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
- 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_32((unsigned)TD.getTypeAlignment(I->getType()));
- }
- O << "\t\t" << CommentString << " ";
- WriteAsOperand(O, I, false, true, &M);
- O << "\n";
- }
- O << "_section_.text:\n"
- << "\t.csect .data[RW],3\n"
- << "\t.llong _section_.text\n";
- AsmPrinter::doFinalization(M);
- return false; // success
+// Force static initialization.
+extern "C" void LLVMInitializePowerPCAsmPrinter() {
+ TargetRegistry::RegisterAsmPrinter(ThePPC32Target, createPPCAsmPrinterPass);
+ TargetRegistry::RegisterAsmPrinter(ThePPC64Target, createPPCAsmPrinterPass);
+
+ TargetRegistry::RegisterMCInstPrinter(ThePPC32Target, createPPCMCInstPrinter);
+ TargetRegistry::RegisterMCInstPrinter(ThePPC64Target, createPPCMCInstPrinter);
}
projects / oota-llvm.git / blobdiff