-//===-- 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 "X86IntelAsmPrinter.h"
+#include "X86Subtarget.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"
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));
-
- struct X86SharedAsmPrinter : public AsmPrinter {
- X86SharedAsmPrinter(std::ostream &O, TargetMachine &TM)
- : AsmPrinter(O, TM) { }
-
- void printConstantPool(MachineConstantPool *MCP);
- bool doFinalization(Module &M);
- };
-}
-
-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());
-}
-
-// SwitchSection - Switch to the specified section of the executable if we are
-// not already in it!
-//
-static void SwitchSection(std::ostream &OS, std::string &CurSection,
- const char *NewSection) {
- if (CurSection != NewSection) {
- CurSection = NewSection;
- if (!CurSection.empty())
- OS << "\t" << NewSection << "\n";
- }
-}
-
-/// printConstantPool - Print to the current output stream assembly
-/// representations of the constants in the constant pool MCP. This is
-/// used to print out constants which have been "spilled to memory" by
-/// the code generator.
-///
-void 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]);
- }
+Statistic<> llvm::EmittedInsts("asm-printer",
+ "Number of machine instrs printed");
+
+enum AsmWriterFlavorTy { att, intel };
+cl::opt<AsmWriterFlavorTy>
+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));
+
+/// doInitialization
+bool X86SharedAsmPrinter::doInitialization(Module &M) {
+ const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
+
+ forDarwin = false;
+ PrivateGlobalPrefix = ".L";
+
+ switch (Subtarget->TargetType) {
+ case X86Subtarget::isDarwin:
+ AlignmentIsInBytes = false;
+ GlobalPrefix = "_";
+ Data64bitsDirective = 0; // we can't emit a 64-bit unit
+ ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
+ PrivateGlobalPrefix = "L"; // Marker for constant pool idxs
+ ConstantPoolSection = "\t.const\n";
+ LCOMMDirective = "\t.lcomm\t";
+ COMMDirectiveTakesAlignment = false;
+ HasDotTypeDotSizeDirective = false;
+ forDarwin = true;
+ StaticCtorsSection = ".mod_init_func";
+ StaticDtorsSection = ".mod_term_func";
+ InlineAsmStart = InlineAsmEnd = ""; // Don't use #APP/#NO_APP
+ break;
+ case X86Subtarget::isCygwin:
+ GlobalPrefix = "_";
+ COMMDirectiveTakesAlignment = false;
+ HasDotTypeDotSizeDirective = false;
+ break;
+ case X86Subtarget::isWindows:
+ GlobalPrefix = "_";
+ HasDotTypeDotSizeDirective = false;
+ break;
+ default: break;
+ }
+
+ if (forDarwin) {
+ // Emit initial debug information.
+ DW.BeginModule(&M);
+ }
+
+ return AsmPrinter::doInitialization(M);
}
bool X86SharedAsmPrinter::doFinalization(Module &M) {
const TargetData &TD = TM.getTargetData();
- std::string CurSection;
// 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 = getPreferredAlignmentLog(I);
+
+ if (C->isNullValue() && /* FIXME: Verify correct */
+ (I->hasInternalLinkage() || I->hasWeakLinkage() ||
+ I->hasLinkOnceLinkage() ||
+ (forDarwin && I->hasExternalLinkage() && !I->hasSection()))) {
+ 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
- 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");
- else
- SwitchSection(O, CurSection, ".data");
- break;
- case GlobalValue::GhostLinkage:
- std::cerr << "GhostLinkage cannot appear in X86AsmPrinter!\n";
- abort();
+ SwitchSection(".data", I);
+ if (LCOMMDirective != NULL) {
+ if (I->hasInternalLinkage()) {
+ O << LCOMMDirective << name << "," << Size;
+ if (forDarwin)
+ O << "," << (AlignmentIsInBytes ? (1 << Align) : Align);
+ } else
+ O << COMMDirective << name << "," << Size;
+ } else {
+ if (I->hasInternalLinkage())
+ O << "\t.local\t" << name << "\n";
+ O << COMMDirective << name << "," << Size;
+ if (COMMDirectiveTakesAlignment)
+ O << "," << (AlignmentIsInBytes ? (1 << Align) : Align);
}
-
- 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);
}
- }
-
- 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;
+ O << "\t\t" << CommentString << " " << I->getName() << "\n";
+ } else {
+ switch (I->getLinkage()) {
+ case GlobalValue::LinkOnceLinkage:
+ case GlobalValue::WeakLinkage:
+ if (forDarwin) {
+ O << "\t.globl " << name << "\n"
+ << "\t.weak_definition " << name << "\n";
+ SwitchSection(".section __DATA,__datacoal_nt,coalesced", I);
+ } else {
+ O << "\t.section\t.llvm.linkonce.d." << name << ",\"aw\",@progbits\n";
+ O << "\t.weak " << name << "\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:
+ SwitchSection(".data", I);
+ 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
+ EmitAlignment(Align, I);
+ O << name << ":\t\t\t\t" << CommentString << " " << I->getName()
+ << "\n";
+ if (HasDotTypeDotSizeDirective)
+ O << "\t.size " << name << ", " << Size << "\n";
-
-// Include the auto-generated portion of the assembly writer.
-#include "X86GenIntelAsmWriter.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);
+ EmitGlobalConstant(C);
+ O << '\n';
}
}
+
+ if (forDarwin) {
+ SwitchSection("", 0);
- // 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;
+ // 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) {
+ SwitchSection(".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";
}
- // 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!");
+ O << "\n";
- 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);
+ // Output stubs for external and common global variables.
+ if (GVStubs.begin() != GVStubs.end())
+ SwitchSection(".section __IMPORT,__pointers,non_lazy_symbol_pointers", 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";
}
-
- if (DispSpec.getImmedValue())
- O << " + " << DispSpec.getImmedValue();
- O << "]";
- return;
- }
- O << "[";
- bool NeedPlus = false;
- if (BaseReg.getReg()) {
- printOp(BaseReg, true);
- NeedPlus = true;
- }
-
- if (IndexReg.getReg()) {
- if (NeedPlus) O << " + ";
- if (ScaleVal != 1)
- O << ScaleVal << "*";
- printOp(IndexReg);
- NeedPlus = true;
- }
+ // Emit initial debug information.
+ DW.EndModule();
- 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;
- }
+ // 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";
}
- 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 "X86GenATTAsmWriter.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);
- }
- }
-
- // 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 << ")";
- }
- return;
- }
-
- if (DispSpec.isGlobalAddress()) {
- printOp(DispSpec, true);
- } else {
- int DispVal = DispSpec.getImmedValue();
- if (DispVal)
- O << DispVal;
- }
-
- if (IndexReg.getReg() || BaseReg.getReg()) {
- O << "(";
- if (BaseReg.getReg())
- printOp(BaseReg);
-
- if (IndexReg.getReg()) {
- O << ",";
- printOp(IndexReg);
- if (ScaleVal != 1)
- O << "," << ScaleVal;
- }
-
- O << ")";
- }
-}
-
-
-/// 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){
+FunctionPass *llvm::createX86CodePrinterPass(std::ostream &o,
+ X86TargetMachine &tm){
switch (AsmWriterFlavor) {
- default: assert(0 && "Unknown asm flavor!");
+ default:
+ assert(0 && "Unknown asm flavor!");
case intel:
return new X86IntelAsmPrinter(o, tm);
case att:
projects / oota-llvm.git / blobdiff