-//===-- X86AsmPrinter.cpp - Convert X86 LLVM code to Intel assembly -------===//
-//
+//===-- X86AsmPrinter.cpp - Convert X86 LLVM IR to X86 assembly -----------===//
+//
// 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 contains a printer that converts from our internal representation
-// of machine-dependent LLVM code to Intel and AT&T format assembly
-// language. This printer is the output mechanism used by `llc' and `lli
-// -print-machineinstrs' on X86.
+// This file the shared super class printer that converts from our internal
+// representation of machine-dependent LLVM code to Intel and AT&T format
+// assembly language.
+// This printer is the output mechanism used by `llc'.
//
//===----------------------------------------------------------------------===//
-#include "X86.h"
-#include "X86TargetMachine.h"
+#include "X86AsmPrinter.h"
+#include "X86ATTAsmPrinter.h"
+#include "X86COFF.h"
+#include "X86IntelAsmPrinter.h"
+#include "X86MachineFunctionInfo.h"
+#include "X86Subtarget.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/CallingConv.h"
+#include "llvm/Constants.h"
#include "llvm/Module.h"
+#include "llvm/Type.h"
#include "llvm/Assembly/Writer.h"
-#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/MachineConstantPool.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/ValueTypes.h"
-#include "llvm/Target/TargetMachine.h"
#include "llvm/Support/Mangler.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/Support/CommandLine.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetOptions.h"
using namespace llvm;
-namespace {
- Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed");
- enum AsmWriterFlavor { att, intel };
-
- cl::opt<AsmWriterFlavor>
- AsmWriterFlavor("x86-asm-syntax",
- cl::desc("Choose style of code to emit from X86 backend:"),
- cl::values(
- clEnumVal(att, " Emit AT&T-style assembly"),
- clEnumVal(intel, " Emit Intel-style assembly"),
- clEnumValEnd),
- cl::init(att));
+static X86FunctionInfo calculateFunctionInfo(const Function *F,
+ const TargetData *TD) {
+ X86FunctionInfo Info;
+ uint64_t Size = 0;
+
+ switch (F->getCallingConv()) {
+ case CallingConv::X86_StdCall:
+ Info.setDecorationStyle(StdCall);
+ break;
+ case CallingConv::X86_FastCall:
+ Info.setDecorationStyle(FastCall);
+ break;
+ default:
+ return Info;
+ }
- struct X86SharedAsmPrinter : public AsmPrinter {
- X86SharedAsmPrinter(std::ostream &O, TargetMachine &TM)
- : AsmPrinter(O, TM) { }
+ for (Function::const_arg_iterator AI = F->arg_begin(), AE = F->arg_end();
+ AI != AE; ++AI)
+ Size += TD->getTypeSize(AI->getType());
- void printConstantPool(MachineConstantPool *MCP);
- bool doFinalization(Module &M);
- };
+ // Size should be aligned to DWORD boundary
+ Size = ((Size + 3)/4)*4;
+
+ // We're not supporting tooooo huge arguments :)
+ Info.setBytesToPopOnReturn((unsigned int)Size);
+ return Info;
}
-static bool isScale(const MachineOperand &MO) {
- return MO.isImmediate() &&
- (MO.getImmedValue() == 1 || MO.getImmedValue() == 2 ||
- MO.getImmedValue() == 4 || MO.getImmedValue() == 8);
-}
-static bool isMem(const MachineInstr *MI, unsigned Op) {
- if (MI->getOperand(Op).isFrameIndex()) return true;
- if (MI->getOperand(Op).isConstantPoolIndex()) return true;
- return Op+4 <= MI->getNumOperands() &&
- MI->getOperand(Op ).isRegister() && isScale(MI->getOperand(Op+1)) &&
- MI->getOperand(Op+2).isRegister() && (MI->getOperand(Op+3).isImmediate() ||
- MI->getOperand(Op+3).isGlobalAddress());
-}
+/// decorateName - Query FunctionInfoMap and use this information for various
+/// name decoration.
+void X86SharedAsmPrinter::decorateName(std::string &Name,
+ const GlobalValue *GV) {
+ const Function *F = dyn_cast<Function>(GV);
+ if (!F) return;
-// 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";
+ // We don't want to decorate non-stdcall or non-fastcall functions right now
+ unsigned CC = F->getCallingConv();
+ if (CC != CallingConv::X86_StdCall && CC != CallingConv::X86_FastCall)
+ return;
+
+ FMFInfoMap::const_iterator info_item = FunctionInfoMap.find(F);
+
+ const X86FunctionInfo *Info;
+ if (info_item == FunctionInfoMap.end()) {
+ // Calculate apropriate function info and populate map
+ FunctionInfoMap[F] = calculateFunctionInfo(F, TM.getTargetData());
+ Info = &FunctionInfoMap[F];
+ } else {
+ Info = &info_item->second;
+ }
+
+ switch (Info->getDecorationStyle()) {
+ case None:
+ break;
+ case StdCall:
+ if (!F->isVarArg()) // Variadic functions do not receive @0 suffix.
+ Name += '@' + utostr_32(Info->getBytesToPopOnReturn());
+ break;
+ case FastCall:
+ if (!F->isVarArg()) // Variadic functions do not receive @0 suffix.
+ Name += '@' + utostr_32(Info->getBytesToPopOnReturn());
+
+ if (Name[0] == '_') {
+ Name[0] = '@';
+ } else {
+ Name = '@' + Name;
+ }
+ break;
+ default:
+ assert(0 && "Unsupported DecorationStyle");
}
}
-/// 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 X86SharedAsmPrinter::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.section .rodata\n";
- emitAlignment(TD.getTypeAlignmentShift(CP[i]->getType()));
- O << ".CPI" << CurrentFnName << "_" << i << ":\t\t\t\t\t" << CommentString
- << *CP[i] << "\n";
- emitGlobalConstant(CP[i]);
+/// doInitialization
+bool X86SharedAsmPrinter::doInitialization(Module &M) {
+ if (Subtarget->isTargetELF() ||
+ Subtarget->isTargetCygMing() ||
+ Subtarget->isTargetDarwin()) {
+ // Emit initial debug information.
+ DW.BeginModule(&M);
}
+
+ return AsmPrinter::doInitialization(M);
}
bool X86SharedAsmPrinter::doFinalization(Module &M) {
- const TargetData &TD = TM.getTargetData();
- std::string CurSection;
-
+ // Note: this code is not shared by the Intel printer as it is too different
+ // from how MASM does things. When making changes here don't forget to look
+ // at X86IntelAsmPrinter::doFinalization().
+ const TargetData *TD = TM.getTargetData();
+
// Print out module-level global variables here.
- for (Module::const_giterator I = M.gbegin(), E = M.gend(); I != E; ++I)
- if (I->hasInitializer()) { // External global require no code
- O << "\n\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() &&
- (I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
- I->hasWeakLinkage() /* FIXME: Verify correct */)) {
- SwitchSection(O, CurSection, ".data");
- if (I->hasInternalLinkage())
- O << "\t.local " << name << "\n";
-
- O << "\t.comm " << name << "," << TD.getTypeSize(C->getType())
- << "," << (1 << Align);
- O << "\t\t# ";
- WriteAsOperand(O, I, true, true, &M);
- O << "\n";
+ 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 (EmitSpecialLLVMGlobal(I))
+ continue;
+
+ std::string name = Mang->getValueName(I);
+ Constant *C = I->getInitializer();
+ unsigned Size = TD->getTypeSize(C->getType());
+ unsigned Align = TD->getPreferredAlignmentLog(I);
+
+ if (C->isNullValue() && /* FIXME: Verify correct */
+ !I->hasSection() &&
+ (I->hasInternalLinkage() || I->hasWeakLinkage() ||
+ I->hasLinkOnceLinkage() ||
+ (Subtarget->isTargetDarwin() &&
+ I->hasExternalLinkage()))) {
+ if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
+ if (I->hasExternalLinkage()) {
+ O << "\t.globl\t" << name << "\n";
+ O << "\t.zerofill __DATA__, __common, " << name << ", "
+ << Size << ", " << Align;
} else {
- switch (I->getLinkage()) {
- case GlobalValue::LinkOnceLinkage:
- case GlobalValue::WeakLinkage: // FIXME: Verify correct for weak.
- // Nonnull linkonce -> weak
+ if (!NoZerosInBSS && TAI->getBSSSection())
+ SwitchToDataSection(TAI->getBSSSection(), I);
+ else
+ SwitchToDataSection(TAI->getDataSection(), I);
+ if (TAI->getLCOMMDirective() != NULL) {
+ if (I->hasInternalLinkage()) {
+ O << TAI->getLCOMMDirective() << name << "," << Size;
+ if (Subtarget->isTargetDarwin())
+ O << "," << (TAI->getAlignmentIsInBytes() ? (1 << Align) : Align);
+ } else
+ O << TAI->getCOMMDirective() << name << "," << Size;
+ } else {
+ if (!Subtarget->isTargetCygMing()) {
+ if (I->hasInternalLinkage())
+ O << "\t.local\t" << name << "\n";
+ }
+ O << TAI->getCOMMDirective() << name << "," << Size;
+ if (TAI->getCOMMDirectiveTakesAlignment())
+ O << "," << (TAI->getAlignmentIsInBytes() ? (1 << Align) : Align);
+ }
+ }
+ O << "\t\t" << TAI->getCommentString() << " " << I->getName() << "\n";
+ } else {
+ switch (I->getLinkage()) {
+ case GlobalValue::LinkOnceLinkage:
+ case GlobalValue::WeakLinkage:
+ if (Subtarget->isTargetDarwin()) {
+ O << "\t.globl " << name << "\n"
+ << "\t.weak_definition " << name << "\n";
+ SwitchToDataSection(".section __DATA,__const_coal,coalesced", I);
+ } else if (Subtarget->isTargetCygMing()) {
+ std::string SectionName(".section\t.data$linkonce." +
+ name +
+ ",\"aw\"");
+ SwitchToDataSection(SectionName.c_str(), I);
+ O << "\t.globl " << name << "\n"
+ << "\t.linkonce same_size\n";
+ } else {
+ std::string SectionName("\t.section\t.llvm.linkonce.d." +
+ name +
+ ",\"aw\",@progbits");
+ SwitchToDataSection(SectionName.c_str(), I);
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.
- case GlobalValue::ExternalLinkage:
- // If external or appending, declare as a global symbol
- O << "\t.globl " << name << "\n";
- // FALL THROUGH
- case GlobalValue::InternalLinkage:
- if (C->isNullValue())
- SwitchSection(O, CurSection, ".bss");
+ }
+ 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::DLLExportLinkage:
+ DLLExportedGVs.insert(Mang->makeNameProper(I->getName(),""));
+ // FALL THROUGH
+ case GlobalValue::ExternalLinkage:
+ // If external or appending, declare as a global symbol
+ O << "\t.globl " << name << "\n";
+ // FALL THROUGH
+ case GlobalValue::InternalLinkage: {
+ if (I->isConstant()) {
+ const ConstantArray *CVA = dyn_cast<ConstantArray>(C);
+ if (TAI->getCStringSection() && CVA && CVA->isCString()) {
+ SwitchToDataSection(TAI->getCStringSection(), I);
+ break;
+ }
+ }
+ // FIXME: special handling for ".ctors" & ".dtors" sections
+ if (I->hasSection() &&
+ (I->getSection() == ".ctors" ||
+ I->getSection() == ".dtors")) {
+ std::string SectionName = ".section " + I->getSection();
+
+ if (Subtarget->isTargetCygMing()) {
+ SectionName += ",\"aw\"";
+ } else {
+ assert(!Subtarget->isTargetDarwin());
+ SectionName += ",\"aw\",@progbits";
+ }
+
+ SwitchToDataSection(SectionName.c_str());
+ } else {
+ if (C->isNullValue() && !NoZerosInBSS && TAI->getBSSSection())
+ SwitchToDataSection(TAI->getBSSSection(), I);
else
- SwitchSection(O, CurSection, ".data");
- break;
- case GlobalValue::GhostLinkage:
- std::cerr << "GhostLinkage cannot appear in X86AsmPrinter!\n";
- abort();
+ SwitchToDataSection(TAI->getDataSection(), I);
}
-
- emitAlignment(Align);
- O << "\t.type " << name << ",@object\n";
- O << "\t.size " << name << "," << Size << "\n";
- O << name << ":\t\t\t\t# ";
- WriteAsOperand(O, I, true, true, &M);
- O << " = ";
- WriteAsOperand(O, C, false, false, &M);
- O << "\n";
- emitGlobalConstant(C);
- }
- }
-
- AsmPrinter::doFinalization(M);
- return false; // success
-}
-
-namespace {
- struct X86IntelAsmPrinter : public X86SharedAsmPrinter {
- X86IntelAsmPrinter(std::ostream &O, TargetMachine &TM)
- : X86SharedAsmPrinter(O, TM) { }
-
- virtual const char *getPassName() const {
- return "X86 Intel-Style Assembly Printer";
- }
-
- /// 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);
-
- // This method is used by the tablegen'erated instruction printer.
- void printOperand(const MachineInstr *MI, unsigned OpNo, MVT::ValueType VT){
- const MachineOperand &MO = MI->getOperand(OpNo);
- if (MO.getType() == MachineOperand::MO_MachineRegister) {
- assert(MRegisterInfo::isPhysicalRegister(MO.getReg())&&"Not physref??");
- // Bug Workaround: See note in Printer::doInitialization about %.
- O << "%" << TM.getRegisterInfo()->get(MO.getReg()).Name;
- } else {
- printOp(MO);
+
+ break;
}
- }
-
- void printCallOperand(const MachineInstr *MI, unsigned OpNo,
- MVT::ValueType VT) {
- printOp(MI->getOperand(OpNo), true); // Don't print "OFFSET".
- }
-
- void printMemoryOperand(const MachineInstr *MI, unsigned OpNo,
- MVT::ValueType VT) {
- switch (VT) {
- default: assert(0 && "Unknown arg size!");
- case MVT::i8: O << "BYTE PTR "; break;
- case MVT::i16: O << "WORD PTR "; break;
- case MVT::i32:
- case MVT::f32: O << "DWORD PTR "; break;
- case MVT::i64:
- case MVT::f64: O << "QWORD PTR "; break;
- case MVT::f80: O << "XWORD PTR "; break;
+ default:
+ assert(0 && "Unknown linkage type!");
}
- printMemReference(MI, OpNo);
- }
-
- void printMachineInstruction(const MachineInstr *MI);
- void printOp(const MachineOperand &MO, bool elideOffsetKeyword = false);
- void printMemReference(const MachineInstr *MI, unsigned Op);
- bool runOnMachineFunction(MachineFunction &F);
- bool doInitialization(Module &M);
- };
-} // end of anonymous namespace
-
-// Include the auto-generated portion of the assembly writer.
-#include "X86GenAsmWriter1.inc"
-
-
-/// runOnMachineFunction - This uses the printMachineInstruction()
-/// method to print assembly for each instruction.
-///
-bool X86IntelAsmPrinter::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(4);
- O << "\t.globl\t" << CurrentFnName << "\n";
- O << "\t.type\t" << CurrentFnName << ", @function\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 if there are any predecessors.
- if (I->pred_begin() != I->pred_end())
- 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);
- }
- }
-
- // We didn't modify anything.
- return false;
-}
-
-void X86IntelAsmPrinter::printOp(const MachineOperand &MO,
- bool elideOffsetKeyword /* = false */) {
- const MRegisterInfo &RI = *TM.getRegisterInfo();
- switch (MO.getType()) {
- case MachineOperand::MO_VirtualRegister:
- if (Value *V = MO.getVRegValueOrNull()) {
- O << "<" << V->getName() << ">";
- return;
- }
- // FALLTHROUGH
- case MachineOperand::MO_MachineRegister:
- if (MRegisterInfo::isPhysicalRegister(MO.getReg()))
- // Bug Workaround: See note in Printer::doInitialization about %.
- O << "%" << RI.get(MO.getReg()).Name;
- else
- O << "%reg" << MO.getReg();
- return;
-
- case MachineOperand::MO_SignExtendedImmed:
- case MachineOperand::MO_UnextendedImmed:
- O << (int)MO.getImmedValue();
- return;
- case MachineOperand::MO_MachineBasicBlock: {
- MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
- O << ".LBB" << Mang->getValueName(MBBOp->getParent()->getFunction())
- << "_" << MBBOp->getNumber () << "\t# "
- << MBBOp->getBasicBlock ()->getName ();
- return;
- }
- case MachineOperand::MO_PCRelativeDisp:
- std::cerr << "Shouldn't use addPCDisp() when building X86 MachineInstrs";
- abort ();
- return;
- case MachineOperand::MO_GlobalAddress: {
- if (!elideOffsetKeyword)
- O << "OFFSET ";
- O << Mang->getValueName(MO.getGlobal());
- int Offset = MO.getOffset();
- if (Offset > 0)
- O << " + " << Offset;
- else if (Offset < 0)
- O << " - " << -Offset;
- return;
- }
- case MachineOperand::MO_ExternalSymbol:
- O << MO.getSymbolName();
- return;
- default:
- O << "<unknown operand type>"; return;
- }
-}
-
-void X86IntelAsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op){
- assert(isMem(MI, Op) && "Invalid memory reference!");
-
- const MachineOperand &BaseReg = MI->getOperand(Op);
- int ScaleVal = MI->getOperand(Op+1).getImmedValue();
- const MachineOperand &IndexReg = MI->getOperand(Op+2);
- const MachineOperand &DispSpec = MI->getOperand(Op+3);
-
- if (BaseReg.isFrameIndex()) {
- O << "[frame slot #" << BaseReg.getFrameIndex();
- if (DispSpec.getImmedValue())
- O << " + " << DispSpec.getImmedValue();
- O << "]";
- return;
- } else if (BaseReg.isConstantPoolIndex()) {
- O << "[.CPI" << CurrentFnName << "_"
- << BaseReg.getConstantPoolIndex();
-
- if (IndexReg.getReg()) {
- O << " + ";
- if (ScaleVal != 1)
- O << ScaleVal << "*";
- printOp(IndexReg);
+ EmitAlignment(Align, I);
+ O << name << ":\t\t\t\t" << TAI->getCommentString() << " " << I->getName()
+ << "\n";
+ if (TAI->hasDotTypeDotSizeDirective())
+ O << "\t.size " << name << ", " << Size << "\n";
+ // If the initializer is a extern weak symbol, remember to emit the weak
+ // reference!
+ if (const GlobalValue *GV = dyn_cast<GlobalValue>(C))
+ if (GV->hasExternalWeakLinkage())
+ ExtWeakSymbols.insert(GV);
+
+ EmitGlobalConstant(C);
+ O << '\n';
}
+ if (I->hasHiddenVisibility())
+ if (const char *Directive = TAI->getHiddenDirective())
+ O << Directive << name << "\n";
- if (DispSpec.getImmedValue())
- O << " + " << DispSpec.getImmedValue();
- O << "]";
- return;
+ if (Subtarget->isTargetELF())
+ O << "\t.type " << name << ",@object\n";
}
-
- O << "[";
- bool NeedPlus = false;
- if (BaseReg.getReg()) {
- printOp(BaseReg, true);
- NeedPlus = true;
+
+ // Output linker support code for dllexported globals
+ if (DLLExportedGVs.begin() != DLLExportedGVs.end()) {
+ SwitchToDataSection(".section .drectve");
}
- if (IndexReg.getReg()) {
- if (NeedPlus) O << " + ";
- if (ScaleVal != 1)
- O << ScaleVal << "*";
- printOp(IndexReg);
- NeedPlus = true;
- }
+ for (std::set<std::string>::iterator i = DLLExportedGVs.begin(),
+ e = DLLExportedGVs.end();
+ i != e; ++i) {
+ O << "\t.ascii \" -export:" << *i << ",data\"\n";
+ }
- if (DispSpec.isGlobalAddress()) {
- if (NeedPlus)
- O << " + ";
- printOp(DispSpec, true);
- } else {
- int DispVal = DispSpec.getImmedValue();
- if (DispVal) {
- if (NeedPlus)
- if (DispVal > 0)
- O << " + ";
- else {
- O << " - ";
- DispVal = -DispVal;
- }
- O << DispVal;
- }
+ if (DLLExportedFns.begin() != DLLExportedFns.end()) {
+ SwitchToDataSection(".section .drectve");
}
- O << "]";
-}
-
-
-/// printMachineInstruction -- Print out a single X86 LLVM instruction
-/// MI in Intel syntax to the current output stream.
-///
-void X86IntelAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
- ++EmittedInsts;
-
- // Call the autogenerated instruction printer routines.
- printInstruction(MI);
-}
-
-bool X86IntelAsmPrinter::doInitialization(Module &M) {
- AsmPrinter::doInitialization(M);
- // Tell gas we are outputting Intel syntax (not AT&T syntax) assembly.
- //
- // Bug: gas in `intel_syntax noprefix' mode interprets the symbol `Sp' in an
- // instruction as a reference to the register named sp, and if you try to
- // reference a symbol `Sp' (e.g. `mov ECX, OFFSET Sp') then it gets lowercased
- // before being looked up in the symbol table. This creates spurious
- // `undefined symbol' errors when linking. Workaround: Do not use `noprefix'
- // mode, and decorate all register names with percent signs.
- O << "\t.intel_syntax\n";
- return false;
-}
-
-
-
-namespace {
- struct X86ATTAsmPrinter : public X86SharedAsmPrinter {
- X86ATTAsmPrinter(std::ostream &O, TargetMachine &TM)
- : X86SharedAsmPrinter(O, TM) { }
-
- virtual const char *getPassName() const {
- return "X86 AT&T-Style Assembly Printer";
- }
-
- /// 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);
-
- // This method is used by the tablegen'erated instruction printer.
- void printOperand(const MachineInstr *MI, unsigned OpNo, MVT::ValueType VT){
- printOp(MI->getOperand(OpNo));
- }
-
- void printCallOperand(const MachineInstr *MI, unsigned OpNo,
- MVT::ValueType VT) {
- printOp(MI->getOperand(OpNo), true); // Don't print '$' prefix.
- }
-
- void printMemoryOperand(const MachineInstr *MI, unsigned OpNo,
- MVT::ValueType VT) {
- printMemReference(MI, OpNo);
- }
-
- void printMachineInstruction(const MachineInstr *MI);
- void printOp(const MachineOperand &MO, bool isCallOperand = false);
- void printMemReference(const MachineInstr *MI, unsigned Op);
- bool runOnMachineFunction(MachineFunction &F);
- };
-} // end of anonymous namespace
-
-
-// Include the auto-generated portion of the assembly writer.
-#include "X86GenAsmWriter.inc"
-
-
-/// runOnMachineFunction - This uses the printMachineInstruction()
-/// method to print assembly for each instruction.
-///
-bool X86ATTAsmPrinter::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(4);
- O << "\t.globl\t" << CurrentFnName << "\n";
- O << "\t.type\t" << CurrentFnName << ", @function\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.
- if (I->pred_begin() != I->pred_end())
- 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);
+ for (std::set<std::string>::iterator i = DLLExportedFns.begin(),
+ e = DLLExportedFns.end();
+ i != e; ++i) {
+ O << "\t.ascii \" -export:" << *i << "\"\n";
+ }
+
+ if (Subtarget->isTargetDarwin()) {
+ SwitchToDataSection("");
+
+ // Output stubs for dynamically-linked functions
+ unsigned j = 1;
+ for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
+ i != e; ++i, ++j) {
+ SwitchToDataSection(".section __IMPORT,__jump_table,symbol_stubs,"
+ "self_modifying_code+pure_instructions,5", 0);
+ O << "L" << *i << "$stub:\n";
+ O << "\t.indirect_symbol " << *i << "\n";
+ O << "\thlt ; hlt ; hlt ; hlt ; hlt\n";
}
- }
-
- // We didn't modify anything.
- return false;
-}
-
-void X86ATTAsmPrinter::printOp(const MachineOperand &MO, bool isCallOp) {
- const MRegisterInfo &RI = *TM.getRegisterInfo();
- switch (MO.getType()) {
- case MachineOperand::MO_VirtualRegister:
- case MachineOperand::MO_MachineRegister:
- assert(MRegisterInfo::isPhysicalRegister(MO.getReg()) &&
- "Virtual registers should not make it this far!");
- O << '%';
- for (const char *Name = RI.get(MO.getReg()).Name; *Name; ++Name)
- O << (char)tolower(*Name);
- return;
-
- case MachineOperand::MO_SignExtendedImmed:
- case MachineOperand::MO_UnextendedImmed:
- O << '$' << (int)MO.getImmedValue();
- return;
- case MachineOperand::MO_MachineBasicBlock: {
- MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
- O << ".LBB" << Mang->getValueName(MBBOp->getParent()->getFunction())
- << "_" << MBBOp->getNumber () << "\t# "
- << MBBOp->getBasicBlock ()->getName ();
- return;
- }
- case MachineOperand::MO_PCRelativeDisp:
- std::cerr << "Shouldn't use addPCDisp() when building X86 MachineInstrs";
- abort ();
- return;
- case MachineOperand::MO_GlobalAddress: {
- if (!isCallOp) O << '$';
- O << Mang->getValueName(MO.getGlobal());
- int Offset = MO.getOffset();
- if (Offset > 0)
- O << "+" << Offset;
- else if (Offset < 0)
- O << Offset;
- return;
- }
- case MachineOperand::MO_ExternalSymbol:
- if (!isCallOp) O << '$';
- O << MO.getSymbolName();
- return;
- default:
- O << "<unknown operand type>"; return;
- }
-}
-
-void X86ATTAsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op){
- assert(isMem(MI, Op) && "Invalid memory reference!");
- const MachineOperand &BaseReg = MI->getOperand(Op);
- int ScaleVal = MI->getOperand(Op+1).getImmedValue();
- const MachineOperand &IndexReg = MI->getOperand(Op+2);
- const MachineOperand &DispSpec = MI->getOperand(Op+3);
-
- if (BaseReg.isFrameIndex()) {
- O << "[frame slot #" << BaseReg.getFrameIndex();
- if (DispSpec.getImmedValue())
- O << " + " << DispSpec.getImmedValue();
- O << "]";
- return;
- } else if (BaseReg.isConstantPoolIndex()) {
- O << ".CPI" << CurrentFnName << "_"
- << BaseReg.getConstantPoolIndex();
- if (DispSpec.getImmedValue())
- O << "+" << DispSpec.getImmedValue();
- if (IndexReg.getReg()) {
- O << "(,";
- printOp(IndexReg);
- if (ScaleVal != 1)
- O << "," << ScaleVal;
- O << ")";
+ O << "\n";
+
+ // Output stubs for external and common global variables.
+ if (GVStubs.begin() != GVStubs.end())
+ SwitchToDataSection(
+ ".section __IMPORT,__pointers,non_lazy_symbol_pointers");
+ 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";
}
- return;
- }
- if (DispSpec.isGlobalAddress()) {
- printOp(DispSpec, true);
- } else {
- int DispVal = DispSpec.getImmedValue();
- if (DispVal || (!IndexReg.getReg() && !BaseReg.getReg()))
- O << DispVal;
- }
-
- if (IndexReg.getReg() || BaseReg.getReg()) {
- O << "(";
- if (BaseReg.getReg())
- printOp(BaseReg);
-
- if (IndexReg.getReg()) {
- O << ",";
- printOp(IndexReg);
- if (ScaleVal != 1)
- O << "," << ScaleVal;
+ // Emit final debug information.
+ DW.EndModule();
+
+ // 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";
+ } else if (Subtarget->isTargetCygMing()) {
+ // Emit type information for external functions
+ for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
+ i != e; ++i) {
+ O << "\t.def\t " << *i
+ << ";\t.scl\t" << COFF::C_EXT
+ << ";\t.type\t" << (COFF::DT_FCN << COFF::N_BTSHFT)
+ << ";\t.endef\n";
}
-
- O << ")";
+
+ // Emit final debug information.
+ DW.EndModule();
+ } else if (Subtarget->isTargetELF()) {
+ // Emit final debug information.
+ DW.EndModule();
}
-}
-
-/// printMachineInstruction -- Print out a single X86 LLVM instruction
-/// MI in Intel syntax to the current output stream.
-///
-void X86ATTAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
- ++EmittedInsts;
- // Call the autogenerated instruction printer routines.
- printInstruction(MI);
+ AsmPrinter::doFinalization(M);
+ return false; // success
}
-
/// createX86CodePrinterPass - Returns a pass that prints the X86 assembly code
/// for a MachineFunction to the given output stream, using the given target
/// machine description.
///
-FunctionPass *llvm::createX86CodePrinterPass(std::ostream &o,TargetMachine &tm){
- switch (AsmWriterFlavor) {
- default: assert(0 && "Unknown asm flavor!");
- case intel:
- return new X86IntelAsmPrinter(o, tm);
- case att:
- return new X86ATTAsmPrinter(o, tm);
+FunctionPass *llvm::createX86CodePrinterPass(std::ostream &o,
+ X86TargetMachine &tm) {
+ const X86Subtarget *Subtarget = &tm.getSubtarget<X86Subtarget>();
+
+ if (Subtarget->isFlavorIntel()) {
+ return new X86IntelAsmPrinter(o, tm, tm.getTargetAsmInfo());
+ } else {
+ return new X86ATTAsmPrinter(o, tm, tm.getTargetAsmInfo());
}
}
projects / oota-llvm.git / blobdiff