-//===-- X86ATTAsmPrinter.cpp - Convert X86 LLVM code to Intel assembly ----===//
+//===-- X86ATTAsmPrinter.cpp - Convert X86 LLVM code to AT&T assembly -----===//
//
// The LLVM Compiler Infrastructure
//
#define DEBUG_TYPE "asm-printer"
#include "X86ATTAsmPrinter.h"
#include "X86.h"
+#include "X86COFF.h"
#include "X86MachineFunctionInfo.h"
#include "X86TargetMachine.h"
#include "X86TargetAsmInfo.h"
STATISTIC(EmittedInsts, "Number of machine instrs printed");
-static std::string computePICLabel(unsigned fnNumber,
- const X86Subtarget* Subtarget)
-{
+static std::string computePICLabel(unsigned FnNum,
+ const TargetAsmInfo *TAI,
+ const X86Subtarget* Subtarget) {
std::string label;
-
- if (Subtarget->isTargetDarwin()) {
- label = "\"L" + utostr_32(fnNumber) + "$pb\"";
- } else if (Subtarget->isTargetELF()) {
- label = ".Lllvm$" + utostr_32(fnNumber) + "$piclabel";
- } else
+ if (Subtarget->isTargetDarwin())
+ label = "\"L" + utostr_32(FnNum) + "$pb\"";
+ else if (Subtarget->isTargetELF())
+ label = ".Lllvm$" + utostr_32(FnNum) + "$piclabel";
+ else
assert(0 && "Don't know how to print PIC label!\n");
return label;
if (Subtarget->isTargetDarwin()) {
return ".section __TEXT,__textcoal_nt,coalesced,pure_instructions";
} else if (Subtarget->isTargetCygMing()) {
- return "\t.section\t.text$linkonce." + CurrentFnName + ",\"ax\"\n";
+ return "\t.section\t.text$linkonce." + CurrentFnName + ",\"ax\"";
} else {
return "\t.section\t.llvm.linkonce.t." + CurrentFnName +
- ",\"ax\",@progbits\n";
+ ",\"ax\",@progbits";
}
}
}
/// method to print assembly for each instruction.
///
bool X86ATTAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
- if (Subtarget->isTargetDarwin() ||
- Subtarget->isTargetELF() ||
- Subtarget->isTargetCygMing()) {
+ if (TAI->doesSupportDebugInformation()) {
// Let PassManager know we need debug information and relay
- // the MachineDebugInfo address on to DwarfWriter.
- DW.SetDebugInfo(&getAnalysis<MachineDebugInfo>());
+ // the MachineModuleInfo address on to DwarfWriter.
+ MMI = &getAnalysis<MachineModuleInfo>();
+ DW.SetModuleInfo(MMI);
}
SetupMachineFunction(MF);
// Populate function information map. Actually, We don't want to populate
// non-stdcall or non-fastcall functions' information right now.
if (CC == CallingConv::X86_StdCall || CC == CallingConv::X86_FastCall)
- FunctionInfoMap[F] = *MF.getInfo<X86FunctionInfo>();
+ FunctionInfoMap[F] = *MF.getInfo<X86MachineFunctionInfo>();
X86SharedAsmPrinter::decorateName(CurrentFnName, F);
switch (F->getLinkage()) {
default: assert(0 && "Unknown linkage type!");
case Function::InternalLinkage: // Symbols default to internal.
- EmitAlignment(4, F); // FIXME: This should be parameterized somewhere.
+ if (Subtarget->isTargetDarwin())
+ // FIXME: This should be parameterized somewhere.
+ EmitAlignment(4, F, 0, true, 0x90);
+ else
+ EmitAlignment(4, F); // FIXME: This should be parameterized somewhere.
break;
case Function::DLLExportLinkage:
DLLExportedFns.insert(Mang->makeNameProper(F->getName(), ""));
//FALLS THROUGH
case Function::ExternalLinkage:
- EmitAlignment(4, F); // FIXME: This should be parameterized somewhere.
+ if (Subtarget->isTargetDarwin())
+ // FIXME: This should be parameterized somewhere.
+ EmitAlignment(4, F, 0, true, 0x90);
+ else
+ EmitAlignment(4, F); // FIXME: This should be parameterized somewhere.
O << "\t.globl\t" << CurrentFnName << "\n";
break;
case Function::LinkOnceLinkage:
case Function::WeakLinkage:
if (Subtarget->isTargetDarwin()) {
+ // FIXME: This should be parameterized somewhere.
+ EmitAlignment(4, F, 0, true, 0x90);
O << "\t.globl\t" << CurrentFnName << "\n";
O << "\t.weak_definition\t" << CurrentFnName << "\n";
} else if (Subtarget->isTargetCygMing()) {
EmitAlignment(4, F); // FIXME: This should be parameterized somewhere.
+ O << "\t.globl\t" << CurrentFnName << "\n";
O << "\t.linkonce discard\n";
- O << "\t.globl " << CurrentFnName << "\n";
} else {
EmitAlignment(4, F); // FIXME: This should be parameterized somewhere.
- O << "\t.weak " << CurrentFnName << "\n";
+ O << "\t.weak\t" << CurrentFnName << "\n";
}
break;
}
- if (F->hasHiddenVisibility() && !Subtarget->isTargetDarwin())
- O << "\t.hidden " << CurrentFnName << "\n";
-
+ if (F->hasHiddenVisibility()) {
+ if (const char *Directive = TAI->getHiddenDirective())
+ O << Directive << CurrentFnName << "\n";
+ } else if (F->hasProtectedVisibility()) {
+ if (const char *Directive = TAI->getProtectedDirective())
+ O << Directive << CurrentFnName << "\n";
+ }
+
+ if (Subtarget->isTargetELF())
+ O << "\t.type\t" << CurrentFnName << ",@function\n";
+ else if (Subtarget->isTargetCygMing()) {
+ O << "\t.def\t " << CurrentFnName
+ << ";\t.scl\t" <<
+ (F->getLinkage() == Function::InternalLinkage ? COFF::C_STAT : COFF::C_EXT)
+ << ";\t.type\t" << (COFF::DT_FCN << COFF::N_BTSHFT)
+ << ";\t.endef\n";
+ }
+
O << CurrentFnName << ":\n";
// Add some workaround for linkonce linkage on Cygwin\MinGW
if (Subtarget->isTargetCygMing() &&
F->getLinkage() == Function::WeakLinkage))
O << "Lllvm$workaround$fake$stub$" << CurrentFnName << ":\n";
- if (Subtarget->isTargetDarwin() ||
- Subtarget->isTargetELF() ||
- Subtarget->isTargetCygMing()) {
+ if (TAI->doesSupportDebugInformation()) {
// Emit pre-function debug information.
DW.BeginFunction(&MF);
}
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()) {
+ if (!I->pred_empty()) {
printBasicBlockLabel(I, true);
O << '\n';
}
}
}
- // Print out jump tables referenced by the function.
-
- // Mac OS X requires that the jump table follow the function, so that the jump
- // table is part of the same atom that the function is in.
- EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
-
if (TAI->hasDotTypeDotSizeDirective())
- O << "\t.size " << CurrentFnName << ", .-" << CurrentFnName << "\n";
+ O << "\t.size\t" << CurrentFnName << ", .-" << CurrentFnName << "\n";
- if (Subtarget->isTargetDarwin() ||
- Subtarget->isTargetELF() ||
- Subtarget->isTargetCygMing()) {
+ if (TAI->doesSupportDebugInformation()) {
// Emit post-function debug information.
DW.EndFunction();
}
+ // Print out jump tables referenced by the function.
+ EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
+
// We didn't modify anything.
return false;
}
+static inline bool printGOT(TargetMachine &TM, const X86Subtarget* ST) {
+ return ST->isPICStyleGOT() && TM.getRelocationModel() == Reloc::PIC_;
+}
+
+static inline bool printStub(TargetMachine &TM, const X86Subtarget* ST) {
+ return ST->isPICStyleStub() && TM.getRelocationModel() != Reloc::Static;
+}
+
void X86ATTAsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
const char *Modifier, bool NotRIPRel) {
const MachineOperand &MO = MI->getOperand(OpNo);
}
case MachineOperand::MO_Immediate:
- if (!Modifier || strcmp(Modifier, "debug") != 0)
+ if (!Modifier ||
+ (strcmp(Modifier, "debug") && strcmp(Modifier, "mem")))
O << '$';
O << MO.getImmedValue();
return;
if (TM.getRelocationModel() == Reloc::PIC_) {
if (Subtarget->isPICStyleStub())
- O << "-\"L" << getFunctionNumber() << "$pb\"";
+ O << "-\"" << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
+ << "$pb\"";
else if (Subtarget->isPICStyleGOT())
O << "@GOTOFF";
}
- if (isMemOp && Subtarget->is64Bit() && !NotRIPRel)
+ if (isMemOp && Subtarget->isPICStyleRIPRel() && !NotRIPRel)
O << "(%rip)";
return;
}
if (TM.getRelocationModel() == Reloc::PIC_) {
if (Subtarget->isPICStyleStub())
- O << "-\"L" << getFunctionNumber() << "$pb\"";
- if (Subtarget->isPICStyleGOT())
+ O << "-\"" << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
+ << "$pb\"";
+ else if (Subtarget->isPICStyleGOT())
O << "@GOTOFF";
}
else if (Offset < 0)
O << Offset;
- if (isMemOp && Subtarget->is64Bit() && !NotRIPRel)
+ if (isMemOp && Subtarget->isPICStyleRIPRel() && !NotRIPRel)
O << "(%rip)";
return;
}
case MachineOperand::MO_GlobalAddress: {
bool isCallOp = Modifier && !strcmp(Modifier, "call");
bool isMemOp = Modifier && !strcmp(Modifier, "mem");
- if (!isMemOp && !isCallOp) O << '$';
+ bool needCloseParen = false;
GlobalValue *GV = MO.getGlobal();
+ GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV);
+ bool isThreadLocal = GVar && GVar->isThreadLocal();
+
std::string Name = Mang->getValueName(GV);
-
- bool isExt = (GV->isExternal() || GV->hasWeakLinkage() ||
- GV->hasLinkOnceLinkage());
- bool isHidden = GV->hasHiddenVisibility();
-
X86SharedAsmPrinter::decorateName(Name, GV);
- if (Subtarget->isPICStyleStub()) {
- // Link-once, External, or Weakly-linked global variables need
+ if (!isMemOp && !isCallOp)
+ O << '$';
+ else if (Name[0] == '$') {
+ // The name begins with a dollar-sign. In order to avoid having it look
+ // like an integer immediate to the assembler, enclose it in parens.
+ O << '(';
+ needCloseParen = true;
+ }
+
+ if (printStub(TM, Subtarget)) {
+ // Link-once, declaration, or Weakly-linked global variables need
// non-lazily-resolved stubs
- if (isExt) {
+ if (GV->isDeclaration() ||
+ GV->hasWeakLinkage() ||
+ GV->hasLinkOnceLinkage()) {
// Dynamically-resolved functions need a stub for the function.
if (isCallOp && isa<Function>(GV)) {
FnStubs.insert(Name);
- O << "L" << Name << "$stub";
+ O << TAI->getPrivateGlobalPrefix() << Name << "$stub";
} else {
GVStubs.insert(Name);
- O << "L" << Name << "$non_lazy_ptr";
+ O << TAI->getPrivateGlobalPrefix() << Name << "$non_lazy_ptr";
}
} else {
- if (GV->hasDLLImportLinkage()) {
+ if (GV->hasDLLImportLinkage())
O << "__imp_";
- }
O << Name;
}
if (!isCallOp && TM.getRelocationModel() == Reloc::PIC_)
- O << "-\"L" << getFunctionNumber() << "$pb\"";
+ O << "-\"" << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
+ << "$pb\"";
} else {
if (GV->hasDLLImportLinkage()) {
O << "__imp_";
}
O << Name;
- if (Subtarget->isPICStyleGOT() && isCallOp && isa<Function>(GV)) {
- // Assemble call via PLT for non-local symbols
- if (!isHidden || isExt)
- O << "@PLT";
+ if (isCallOp && isa<Function>(GV)) {
+ if (printGOT(TM, Subtarget)) {
+ // Assemble call via PLT for non-local symbols
+ if (!(GV->hasHiddenVisibility() || GV->hasProtectedVisibility()) ||
+ GV->isDeclaration())
+ O << "@PLT";
+ }
+ if (Subtarget->isTargetCygMing() && GV->isDeclaration())
+ // Save function name for later type emission
+ FnStubs.insert(Name);
}
}
else if (Offset < 0)
O << Offset;
- if (isMemOp) {
- if (isExt) {
- if (Subtarget->isPICStyleGOT()) {
+ if (isThreadLocal) {
+ if (TM.getRelocationModel() == Reloc::PIC_)
+ O << "@TLSGD"; // general dynamic TLS model
+ else
+ if (GV->isDeclaration())
+ O << "@INDNTPOFF"; // initial exec TLS model
+ else
+ O << "@NTPOFF"; // local exec TLS model
+ } else if (isMemOp) {
+ if (printGOT(TM, Subtarget)) {
+ if (Subtarget->GVRequiresExtraLoad(GV, TM, false))
O << "@GOT";
- } else if (Subtarget->isPICStyleRIPRel()) {
- O << "@GOTPCREL(%rip)";
- } else if (Subtarget->is64Bit() && !NotRIPRel)
- // Use rip when possible to reduce code size, except when
- // index or base register are also part of the address. e.g.
- // foo(%rip)(%rcx,%rax,4) is not legal
- O << "(%rip)";
- } else {
- if (Subtarget->is64Bit() && !NotRIPRel)
- O << "(%rip)";
- else if (Subtarget->isPICStyleGOT())
+ else
O << "@GOTOFF";
+ } else if (Subtarget->isPICStyleRIPRel() && !NotRIPRel &&
+ TM.getRelocationModel() != Reloc::Static) {
+ if ((GV->isDeclaration() ||
+ GV->hasWeakLinkage() ||
+ GV->hasLinkOnceLinkage()) &&
+ TM.getRelocationModel() != Reloc::Static)
+ O << "@GOTPCREL";
+
+ if (needCloseParen) {
+ needCloseParen = false;
+ O << ')';
+ }
+
+ // Use rip when possible to reduce code size, except when
+ // index or base register are also part of the address. e.g.
+ // foo(%rip)(%rcx,%rax,4) is not legal
+ O << "(%rip)";
}
}
+ if (needCloseParen)
+ O << ')';
+
return;
}
case MachineOperand::MO_ExternalSymbol: {
bool isCallOp = Modifier && !strcmp(Modifier, "call");
+ bool needCloseParen = false;
std::string Name(TAI->getGlobalPrefix());
Name += MO.getSymbolName();
- if (isCallOp && Subtarget->isPICStyleStub()) {
+ if (isCallOp && printStub(TM, Subtarget)) {
FnStubs.insert(Name);
- O << "L" << Name << "$stub";
+ O << TAI->getPrivateGlobalPrefix() << Name << "$stub";
return;
}
- if (!isCallOp) O << '$';
+ if (!isCallOp)
+ O << '$';
+ else if (Name[0] == '$') {
+ // The name begins with a dollar-sign. In order to avoid having it look
+ // like an integer immediate to the assembler, enclose it in parens.
+ O << '(';
+ needCloseParen = true;
+ }
+
O << Name;
- if (Subtarget->isPICStyleGOT()) {
+ if (printGOT(TM, Subtarget)) {
std::string GOTName(TAI->getGlobalPrefix());
GOTName+="_GLOBAL_OFFSET_TABLE_";
if (Name == GOTName)
- // Really hack! Emit extra offset to PC during printing GOT offset to
- // compensate size of popl instruction. The resulting code should look
- // like:
+ // HACK! Emit extra offset to PC during printing GOT offset to
+ // compensate for the size of popl instruction. The resulting code
+ // should look like:
// call .piclabel
// piclabel:
// popl %some_register
// addl $_GLOBAL_ADDRESS_TABLE_ + [.-piclabel], %some_register
- O << " + [.-" << computePICLabel(getFunctionNumber(), Subtarget) << "]";
+ O << " + [.-"
+ << computePICLabel(getFunctionNumber(), TAI, Subtarget) << "]";
+
+ if (isCallOp)
+ O << "@PLT";
}
- if (isCallOp && Subtarget->isPICStyleGOT())
- O << "@PLT";
+ if (needCloseParen)
+ O << ')';
- if (!isCallOp && Subtarget->is64Bit())
+ if (!isCallOp && Subtarget->isPICStyleRIPRel())
O << "(%rip)";
return;
}
void X86ATTAsmPrinter::printPICLabel(const MachineInstr *MI, unsigned Op) {
- std::string label = computePICLabel(getFunctionNumber(), Subtarget);
+ std::string label = computePICLabel(getFunctionNumber(), TAI, Subtarget);
O << label << "\n" << label << ":";
}
case 'k': // Print SImode register
Reg = getX86SubSuperRegister(Reg, MVT::i32);
break;
+ case 'q': // Print DImode register
+ Reg = getX86SubSuperRegister(Reg, MVT::i64);
+ break;
}
O << '%';
switch (ExtraCode[0]) {
default: return true; // Unknown modifier.
- case 'c': // Don't print "$" before a global var name.
+ case 'c': // Don't print "$" before a global var name or constant.
printOperand(MI, OpNo, "mem");
return false;
case 'b': // Print QImode register
case 'h': // Print QImode high register
case 'w': // Print HImode register
case 'k': // Print SImode register
- return printAsmMRegister(MI->getOperand(OpNo), ExtraCode[0]);
+ case 'q': // Print DImode register
+ if (MI->getOperand(OpNo).isRegister())
+ return printAsmMRegister(MI->getOperand(OpNo), ExtraCode[0]);
+ printOperand(MI, OpNo);
+ return false;
+
+ case 'P': // Don't print @PLT, but do print as memory.
+ printOperand(MI, OpNo, "mem");
+ return false;
}
}
unsigned OpNo,
unsigned AsmVariant,
const char *ExtraCode) {
- if (ExtraCode && ExtraCode[0])
- return true; // Unknown modifier.
+ if (ExtraCode && ExtraCode[0]) {
+ if (ExtraCode[1] != 0) return true; // Unknown modifier.
+
+ switch (ExtraCode[0]) {
+ default: return true; // Unknown modifier.
+ case 'b': // Print QImode register
+ case 'h': // Print QImode high register
+ case 'w': // Print HImode register
+ case 'k': // Print SImode register
+ case 'q': // Print SImode register
+ // These only apply to registers, ignore on mem.
+ break;
+ }
+ }
printMemReference(MI, OpNo);
return false;
}
/// printMachineInstruction -- Print out a single X86 LLVM instruction
-/// MI in Intel syntax to the current output stream.
+/// MI in AT&T syntax to the current output stream.
///
void X86ATTAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
++EmittedInsts;
// See if a truncate instruction can be turned into a nop.
switch (MI->getOpcode()) {
default: break;
- case X86::TRUNC_64to32:
- case X86::TRUNC_64to16:
- case X86::TRUNC_32to16:
- case X86::TRUNC_32to8:
- case X86::TRUNC_16to8:
- case X86::TRUNC_32_to8:
- case X86::TRUNC_16_to8: {
- const MachineOperand &MO0 = MI->getOperand(0);
- const MachineOperand &MO1 = MI->getOperand(1);
- unsigned Reg0 = MO0.getReg();
- unsigned Reg1 = MO1.getReg();
- unsigned Opc = MI->getOpcode();
- if (Opc == X86::TRUNC_64to32)
- Reg1 = getX86SubSuperRegister(Reg1, MVT::i32);
- else if (Opc == X86::TRUNC_32to16 || Opc == X86::TRUNC_64to16)
- Reg1 = getX86SubSuperRegister(Reg1, MVT::i16);
- else
- Reg1 = getX86SubSuperRegister(Reg1, MVT::i8);
- O << TAI->getCommentString() << " TRUNCATE ";
- if (Reg0 != Reg1)
- O << "\n\t";
- break;
- }
case X86::PsMOVZX64rr32:
O << TAI->getCommentString() << " ZERO-EXTEND " << "\n\t";
break;
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