#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/DerivedTypes.h"
#include "llvm/Type.h"
#include "llvm/Assembly/Writer.h"
#include "llvm/Support/Mangler.h"
-#include "llvm/Support/CommandLine.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetOptions.h"
using namespace llvm;
-Statistic<> llvm::EmittedInsts("asm-printer",
- "Number of machine instrs printed");
+static X86MachineFunctionInfo calculateFunctionInfo(const Function *F,
+ const TargetData *TD) {
+ X86MachineFunctionInfo 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;
+ }
-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),
-#ifdef _MSC_VER
- cl::init(intel)
-#else
- cl::init(att)
-#endif
- );
+ for (Function::const_arg_iterator AI = F->arg_begin(), AE = F->arg_end();
+ AI != AE; ++AI)
+ // Size should be aligned to DWORD boundary
+ Size += ((TD->getABITypeSize(AI->getType()) + 3)/4)*4;
+
+ // We're not supporting tooooo huge arguments :)
+ Info.setBytesToPopOnReturn((unsigned int)Size);
+ return Info;
+}
-// Out of line virtual function to home classes.
-void X86DwarfWriter::virtfn() {}
+/// 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;
-/// doInitialization
-bool X86SharedAsmPrinter::doInitialization(Module &M) {
- PrivateGlobalPrefix = ".L";
- DefaultTextSection = ".text";
- DefaultDataSection = ".data";
+ // 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;
+
+ // Decorate names only when we're targeting Cygwin/Mingw32 targets
+ if (!Subtarget->isTargetCygMing())
+ return;
+
+ FMFInfoMap::const_iterator info_item = FunctionInfoMap.find(F);
+
+ const X86MachineFunctionInfo *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 (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";
- JumpTableDataSection = "\t.const\n"; // FIXME: depends on PIC mode
- FourByteConstantSection = "\t.literal4\n";
- EightByteConstantSection = "\t.literal8\n";
- LCOMMDirective = "\t.lcomm\t";
- COMMDirectiveTakesAlignment = false;
- HasDotTypeDotSizeDirective = false;
- StaticCtorsSection = ".mod_init_func";
- StaticDtorsSection = ".mod_term_func";
- InlineAsmStart = "# InlineAsm Start";
- InlineAsmEnd = "# InlineAsm End";
+ const FunctionType *FT = F->getFunctionType();
+ switch (Info->getDecorationStyle()) {
+ case None:
break;
- case X86Subtarget::isCygwin:
- GlobalPrefix = "_";
- COMMDirectiveTakesAlignment = false;
- HasDotTypeDotSizeDirective = false;
- StaticCtorsSection = "\t.section .ctors,\"aw\"";
- StaticDtorsSection = "\t.section .dtors,\"aw\"";
+ case StdCall:
+ // "Pure" variadic functions do not receive @0 suffix.
+ if (!FT->isVarArg() || (FT->getNumParams() == 0) ||
+ (FT->getNumParams() == 1 && FT->isStructReturn()))
+ Name += '@' + utostr_32(Info->getBytesToPopOnReturn());
break;
- case X86Subtarget::isWindows:
- GlobalPrefix = "_";
- HasDotTypeDotSizeDirective = false;
+ case FastCall:
+ // "Pure" variadic functions do not receive @0 suffix.
+ if (!FT->isVarArg() || (FT->getNumParams() == 0) ||
+ (FT->getNumParams() == 1 && FT->isStructReturn()))
+ Name += '@' + utostr_32(Info->getBytesToPopOnReturn());
+
+ if (Name[0] == '_') {
+ Name[0] = '@';
+ } else {
+ Name = '@' + Name;
+ }
break;
- default: break;
+ default:
+ assert(0 && "Unsupported DecorationStyle");
}
-
- if (Subtarget->TargetType == X86Subtarget::isDarwin) {
+}
+
+/// doInitialization
+bool X86SharedAsmPrinter::doInitialization(Module &M) {
+ if (TAI->doesSupportDebugInformation()) {
// Emit initial debug information.
DW.BeginModule(&M);
}
- return AsmPrinter::doInitialization(M);
+ bool Result = AsmPrinter::doInitialization(M);
+
+ // Darwin wants symbols to be quoted if they have complex names.
+ if (Subtarget->isTargetDarwin())
+ Mang->setUseQuotes(true);
+
+ return Result;
}
bool X86SharedAsmPrinter::doFinalization(Module &M) {
// 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_global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) {
- if (!I->hasInitializer()) continue; // External global require no code
+ 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))
+ if (EmitSpecialLLVMGlobal(I)) {
+ if (Subtarget->isTargetDarwin() &&
+ TM.getRelocationModel() == Reloc::Static) {
+ if (I->getName() == "llvm.global_ctors")
+ O << ".reference .constructors_used\n";
+ else if (I->getName() == "llvm.global_dtors")
+ O << ".reference .destructors_used\n";
+ }
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() ||
- (Subtarget->TargetType == X86Subtarget::isDarwin &&
- I->hasExternalLinkage() && !I->hasSection()))) {
- if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
+ const Type *Type = C->getType();
+ unsigned Size = TD->getABITypeSize(Type);
+ unsigned Align = TD->getPreferredAlignmentLog(I);
+
+ if (I->hasHiddenVisibility()) {
+ if (const char *Directive = TAI->getHiddenDirective())
+ O << Directive << name << "\n";
+ } else if (I->hasProtectedVisibility()) {
+ if (const char *Directive = TAI->getProtectedDirective())
+ O << Directive << name << "\n";
+ }
+
+ if (Subtarget->isTargetELF())
+ O << "\t.type\t" << name << ",@object\n";
+
+ if (C->isNullValue() && !I->hasSection()) {
if (I->hasExternalLinkage()) {
+ if (const char *Directive = TAI->getZeroFillDirective()) {
O << "\t.globl\t" << name << "\n";
- O << "\t.zerofill __DATA__, __common, " << name << ", "
- << Size << ", " << Align;
- } else {
- SwitchToDataSection(DefaultDataSection, I);
- if (LCOMMDirective != NULL) {
+ O << Directive << "__DATA__, __common, " << name << ", "
+ << Size << ", " << Align << "\n";
+ continue;
+ }
+ }
+
+ if (!I->isThreadLocal() &&
+ (I->hasInternalLinkage() || I->hasWeakLinkage() ||
+ I->hasLinkOnceLinkage())) {
+ if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
+ if (!NoZerosInBSS && TAI->getBSSSection())
+ SwitchToDataSection(TAI->getBSSSection(), I);
+ else
+ SwitchToDataSection(TAI->getDataSection(), I);
+ if (TAI->getLCOMMDirective() != NULL) {
if (I->hasInternalLinkage()) {
- O << LCOMMDirective << name << "," << Size;
- if (Subtarget->TargetType == X86Subtarget::isDarwin)
- O << "," << (AlignmentIsInBytes ? (1 << Align) : Align);
+ O << TAI->getLCOMMDirective() << name << "," << Size;
+ if (Subtarget->isTargetDarwin())
+ O << "," << Align;
} else
- O << COMMDirective << name << "," << Size;
+ O << TAI->getCOMMDirective() << name << "," << Size;
} else {
- if (Subtarget->TargetType != X86Subtarget::isCygwin) {
+ if (!Subtarget->isTargetCygMing()) {
if (I->hasInternalLinkage())
O << "\t.local\t" << name << "\n";
}
- O << COMMDirective << name << "," << Size;
- if (COMMDirectiveTakesAlignment)
- O << "," << (AlignmentIsInBytes ? (1 << Align) : Align);
+ O << TAI->getCOMMDirective() << name << "," << Size;
+ if (TAI->getCOMMDirectiveTakesAlignment())
+ O << "," << (TAI->getAlignmentIsInBytes() ? (1 << Align) : Align);
}
+ O << "\t\t" << TAI->getCommentString() << " " << I->getName() << "\n";
+ continue;
}
- O << "\t\t" << CommentString << " " << I->getName() << "\n";
- } else {
- switch (I->getLinkage()) {
- case GlobalValue::LinkOnceLinkage:
- case GlobalValue::WeakLinkage:
- if (Subtarget->TargetType == X86Subtarget::isDarwin) {
- O << "\t.globl " << name << "\n"
- << "\t.weak_definition " << name << "\n";
- SwitchToDataSection(".section __DATA,__const_coal,coalesced", I);
- } else if (Subtarget->TargetType == X86Subtarget::isCygwin) {
- O << "\t.section\t.llvm.linkonce.d." << name << ",\"aw\"\n"
- << "\t.weak " << name << "\n";
+ }
+
+ switch (I->getLinkage()) {
+ case GlobalValue::LinkOnceLinkage:
+ case GlobalValue::WeakLinkage:
+ if (Subtarget->isTargetDarwin()) {
+ O << "\t.globl\t" << 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\t" << 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\t" << name << "\n";
+ }
+ break;
+ case GlobalValue::DLLExportLinkage:
+ DLLExportedGVs.insert(Mang->makeNameProper(I->getName(),""));
+ // FALL THROUGH
+ 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\t" << 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 {
- O << "\t.section\t.llvm.linkonce.d." << name << ",\"aw\",@progbits\n"
- << "\t.weak " << name << "\n";
+ assert(!Subtarget->isTargetDarwin());
+ SectionName += ",\"aw\",@progbits";
+ }
+
+ SwitchToDataSection(SectionName.c_str());
+ } else {
+ if (C->isNullValue() && !NoZerosInBSS && TAI->getBSSSection())
+ SwitchToDataSection(I->isThreadLocal() ? TAI->getTLSBSSSection() :
+ TAI->getBSSSection(), I);
+ else if (!I->isConstant())
+ SwitchToDataSection(I->isThreadLocal() ? TAI->getTLSDataSection() :
+ TAI->getDataSection(), I);
+ else if (I->isThreadLocal())
+ SwitchToDataSection(TAI->getTLSDataSection());
+ else {
+ // Read-only data.
+ bool HasReloc = C->ContainsRelocations();
+ if (HasReloc &&
+ Subtarget->isTargetDarwin() &&
+ TM.getRelocationModel() != Reloc::Static)
+ SwitchToDataSection("\t.const_data\n");
+ else if (!HasReloc && Size == 4 &&
+ TAI->getFourByteConstantSection())
+ SwitchToDataSection(TAI->getFourByteConstantSection(), I);
+ else if (!HasReloc && Size == 8 &&
+ TAI->getEightByteConstantSection())
+ SwitchToDataSection(TAI->getEightByteConstantSection(), I);
+ else if (!HasReloc && Size == 16 &&
+ TAI->getSixteenByteConstantSection())
+ SwitchToDataSection(TAI->getSixteenByteConstantSection(), I);
+ else if (TAI->getReadOnlySection())
+ SwitchToDataSection(TAI->getReadOnlySection(), I);
+ else
+ SwitchToDataSection(TAI->getDataSection(), 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:
- SwitchToDataSection(DefaultDataSection, I);
- break;
- default:
- assert(0 && "Unknown linkage type!");
}
+
+ break;
+ }
+ default:
+ assert(0 && "Unknown linkage type!");
+ }
- EmitAlignment(Align, I);
- O << name << ":\t\t\t\t" << CommentString << " " << I->getName()
- << "\n";
- if (HasDotTypeDotSizeDirective)
- O << "\t.size " << name << ", " << Size << "\n";
+ EmitAlignment(Align, I);
+ O << name << ":\t\t\t\t" << TAI->getCommentString() << " " << I->getName()
+ << "\n";
+ if (TAI->hasDotTypeDotSizeDirective())
+ O << "\t.size\t" << 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';
- }
+ EmitGlobalConstant(C);
}
- if (Subtarget->TargetType == X86Subtarget::isDarwin) {
- SwitchToDataSection("", 0);
+ // Output linker support code for dllexported globals
+ if (!DLLExportedGVs.empty()) {
+ SwitchToDataSection(".section .drectve");
+ }
+
+ for (std::set<std::string>::iterator i = DLLExportedGVs.begin(),
+ e = DLLExportedGVs.end();
+ i != e; ++i) {
+ O << "\t.ascii \" -export:" << *i << ",data\"\n";
+ }
+
+ if (!DLLExportedFns.empty()) {
+ SwitchToDataSection(".section .drectve");
+ }
+
+ 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;
O << "\n";
+ if (ExceptionHandling && TAI->doesSupportExceptionHandling() && MMI) {
+ // Add the (possibly multiple) personalities to the set of global values.
+ const std::vector<Function *>& Personalities = MMI->getPersonalities();
+
+ for (std::vector<Function *>::const_iterator I = Personalities.begin(),
+ E = Personalities.end(); I != E; ++I)
+ if (*I) GVStubs.insert("_" + (*I)->getName());
+ }
+
// Output stubs for external and common global variables.
- if (GVStubs.begin() != GVStubs.end())
+ if (!GVStubs.empty())
SwitchToDataSection(
- ".section __IMPORT,__pointers,non_lazy_symbol_pointers", 0);
+ ".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.long\t0\n";
}
- // Emit initial debug information.
+ // Emit final debug information.
DW.EndModule();
// Funny Darwin hack: This flag tells the linker that no global symbols
// 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";
+ }
+
+ // Emit final debug information.
+ DW.EndModule();
+ } else if (Subtarget->isTargetELF()) {
+ // Emit final debug information.
+ DW.EndModule();
}
- AsmPrinter::doFinalization(M);
- return false; // success
+ return AsmPrinter::doFinalization(M);
}
/// createX86CodePrinterPass - Returns a pass that prints the X86 assembly code
/// machine description.
///
FunctionPass *llvm::createX86CodePrinterPass(std::ostream &o,
- X86TargetMachine &tm){
- switch (AsmWriterFlavor) {
- default:
- assert(0 && "Unknown asm flavor!");
- case intel:
- return new X86IntelAsmPrinter(o, tm);
- case att:
- return new X86ATTAsmPrinter(o, tm);
+ 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());
}
}
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