X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=tools%2Flto%2FLTOModule.cpp;h=6220dd1c56640fbbac99b5a80fd33534108bfdfe;hb=e2ff00e117ba9b758b298e671f65c0b002f8a52d;hp=8ea680d53c53c7e5c4e9f9aa5350c4292759f95a;hpb=931d4c204390752b30d4459264f8786de95b36d8;p=oota-llvm.git diff --git a/tools/lto/LTOModule.cpp b/tools/lto/LTOModule.cpp index 8ea680d53c5..6220dd1c566 100644 --- a/tools/lto/LTOModule.cpp +++ b/tools/lto/LTOModule.cpp @@ -13,46 +13,170 @@ //===----------------------------------------------------------------------===// #include "LTOModule.h" - -#include "llvm/Constants.h" -#include "llvm/LLVMContext.h" -#include "llvm/Module.h" #include "llvm/ADT/OwningPtr.h" #include "llvm/ADT/Triple.h" #include "llvm/Bitcode/ReaderWriter.h" -#include "llvm/Support/SystemUtils.h" -#include "llvm/Support/MemoryBuffer.h" -#include "llvm/Support/MathExtras.h" -#include "llvm/Support/Host.h" -#include "llvm/Support/Path.h" -#include "llvm/Support/Process.h" -#include "llvm/Support/SourceMgr.h" -#include "llvm/Support/TargetRegistry.h" -#include "llvm/Support/TargetSelect.h" -#include "llvm/Support/system_error.h" -#include "llvm/MC/MCAsmInfo.h" +#include "llvm/IR/Constants.h" +#include "llvm/IR/LLVMContext.h" +#include "llvm/IR/Module.h" #include "llvm/MC/MCExpr.h" #include "llvm/MC/MCInst.h" #include "llvm/MC/MCParser/MCAsmParser.h" #include "llvm/MC/MCStreamer.h" #include "llvm/MC/MCSubtargetInfo.h" #include "llvm/MC/MCSymbol.h" -#include "llvm/MC/SubtargetFeature.h" #include "llvm/MC/MCTargetAsmParser.h" -#include "llvm/Target/TargetMachine.h" +#include "llvm/MC/SubtargetFeature.h" +#include "llvm/Support/CommandLine.h" +#include "llvm/Support/Host.h" +#include "llvm/Support/FileSystem.h" +#include "llvm/Support/MemoryBuffer.h" +#include "llvm/Support/Path.h" +#include "llvm/Support/SourceMgr.h" +#include "llvm/Support/TargetRegistry.h" +#include "llvm/Support/TargetSelect.h" +#include "llvm/Support/system_error.h" #include "llvm/Target/TargetRegisterInfo.h" - using namespace llvm; +static cl::opt +EnableFPMAD("enable-fp-mad", + cl::desc("Enable less precise MAD instructions to be generated"), + cl::init(false)); + +static cl::opt +DisableFPElim("disable-fp-elim", + cl::desc("Disable frame pointer elimination optimization"), + cl::init(false)); + +static cl::opt +DisableFPElimNonLeaf("disable-non-leaf-fp-elim", + cl::desc("Disable frame pointer elimination optimization for non-leaf funcs"), + cl::init(false)); + +static cl::opt +EnableUnsafeFPMath("enable-unsafe-fp-math", + cl::desc("Enable optimizations that may decrease FP precision"), + cl::init(false)); + +static cl::opt +EnableNoInfsFPMath("enable-no-infs-fp-math", + cl::desc("Enable FP math optimizations that assume no +-Infs"), + cl::init(false)); + +static cl::opt +EnableNoNaNsFPMath("enable-no-nans-fp-math", + cl::desc("Enable FP math optimizations that assume no NaNs"), + cl::init(false)); + +static cl::opt +EnableHonorSignDependentRoundingFPMath("enable-sign-dependent-rounding-fp-math", + cl::Hidden, + cl::desc("Force codegen to assume rounding mode can change dynamically"), + cl::init(false)); + +static cl::opt +GenerateSoftFloatCalls("soft-float", + cl::desc("Generate software floating point library calls"), + cl::init(false)); + +static cl::opt +FloatABIForCalls("float-abi", + cl::desc("Choose float ABI type"), + cl::init(FloatABI::Default), + cl::values( + clEnumValN(FloatABI::Default, "default", + "Target default float ABI type"), + clEnumValN(FloatABI::Soft, "soft", + "Soft float ABI (implied by -soft-float)"), + clEnumValN(FloatABI::Hard, "hard", + "Hard float ABI (uses FP registers)"), + clEnumValEnd)); + +static cl::opt +FuseFPOps("fp-contract", + cl::desc("Enable aggresive formation of fused FP ops"), + cl::init(FPOpFusion::Standard), + cl::values( + clEnumValN(FPOpFusion::Fast, "fast", + "Fuse FP ops whenever profitable"), + clEnumValN(FPOpFusion::Standard, "on", + "Only fuse 'blessed' FP ops."), + clEnumValN(FPOpFusion::Strict, "off", + "Only fuse FP ops when the result won't be effected."), + clEnumValEnd)); + +static cl::opt +DontPlaceZerosInBSS("nozero-initialized-in-bss", + cl::desc("Don't place zero-initialized symbols into bss section"), + cl::init(false)); + +static cl::opt +EnableGuaranteedTailCallOpt("tailcallopt", + cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."), + cl::init(false)); + +static cl::opt +DisableTailCalls("disable-tail-calls", + cl::desc("Never emit tail calls"), + cl::init(false)); + +static cl::opt +OverrideStackAlignment("stack-alignment", + cl::desc("Override default stack alignment"), + cl::init(0)); + +static cl::opt +EnableRealignStack("realign-stack", + cl::desc("Realign stack if needed"), + cl::init(true)); + +static cl::opt +TrapFuncName("trap-func", cl::Hidden, + cl::desc("Emit a call to trap function rather than a trap instruction"), + cl::init("")); + +static cl::opt +EnablePIE("enable-pie", + cl::desc("Assume the creation of a position independent executable."), + cl::init(false)); + +static cl::opt +SegmentedStacks("segmented-stacks", + cl::desc("Use segmented stacks if possible."), + cl::init(false)); + +static cl::opt +UseInitArray("use-init-array", + cl::desc("Use .init_array instead of .ctors."), + cl::init(false)); + +static cl::opt +SSPBufferSize("stack-protector-buffer-size", cl::init(8), + cl::desc("Lower bound for a buffer to be considered for " + "stack protection")); + +LTOModule::LTOModule(llvm::Module *m, llvm::TargetMachine *t) + : _module(m), _target(t), + _context(_target->getMCAsmInfo(), _target->getRegisterInfo(), NULL), + _mangler(_context, t) {} + +/// isBitcodeFile - Returns 'true' if the file (or memory contents) is LLVM +/// bitcode. bool LTOModule::isBitcodeFile(const void *mem, size_t length) { - return llvm::sys::IdentifyFileType((char*)mem, length) - == llvm::sys::Bitcode_FileType; + return sys::fs::identify_magic(StringRef((const char *)mem, length)) == + sys::fs::file_magic::bitcode; } bool LTOModule::isBitcodeFile(const char *path) { - return llvm::sys::Path(path).isBitcodeFile(); + sys::fs::file_magic type; + if (sys::fs::identify_magic(path, type)) + return false; + return type == sys::fs::file_magic::bitcode; } +/// isBitcodeFileForTarget - Returns 'true' if the file (or memory contents) is +/// LLVM bitcode for the specified triple. bool LTOModule::isBitcodeFileForTarget(const void *mem, size_t length, const char *triplePrefix) { MemoryBuffer *buffer = makeBuffer(mem, length); @@ -69,23 +193,17 @@ bool LTOModule::isBitcodeFileForTarget(const char *path, return isTargetMatch(buffer.take(), triplePrefix); } -// Takes ownership of buffer. +/// isTargetMatch - Returns 'true' if the memory buffer is for the specified +/// target triple. bool LTOModule::isTargetMatch(MemoryBuffer *buffer, const char *triplePrefix) { std::string Triple = getBitcodeTargetTriple(buffer, getGlobalContext()); delete buffer; return strncmp(Triple.c_str(), triplePrefix, strlen(triplePrefix)) == 0; } - -LTOModule::LTOModule(Module *m, TargetMachine *t) - : _module(m), _target(t), - _context(*_target->getMCAsmInfo(), *_target->getRegisterInfo(), NULL), - _mangler(_context, *_target->getTargetData()) -{ -} - -LTOModule *LTOModule::makeLTOModule(const char *path, - std::string &errMsg) { +/// makeLTOModule - Create an LTOModule. N.B. These methods take ownership of +/// the buffer. +LTOModule *LTOModule::makeLTOModule(const char *path, std::string &errMsg) { OwningPtr buffer; if (error_code ec = MemoryBuffer::getFile(path, buffer)) { errMsg = ec.message(); @@ -113,12 +231,6 @@ LTOModule *LTOModule::makeLTOModule(int fd, const char *path, return makeLTOModule(buffer.take(), errMsg); } -/// makeBuffer - Create a MemoryBuffer from a memory range. -MemoryBuffer *LTOModule::makeBuffer(const void *mem, size_t length) { - const char *startPtr = (char*)mem; - return MemoryBuffer::getMemBuffer(StringRef(startPtr, length), "", false); -} - LTOModule *LTOModule::makeLTOModule(const void *mem, size_t length, std::string &errMsg) { OwningPtr buffer(makeBuffer(mem, length)); @@ -127,6 +239,31 @@ LTOModule *LTOModule::makeLTOModule(const void *mem, size_t length, return makeLTOModule(buffer.take(), errMsg); } +void LTOModule::getTargetOptions(TargetOptions &Options) { + Options.LessPreciseFPMADOption = EnableFPMAD; + Options.NoFramePointerElim = DisableFPElim; + Options.NoFramePointerElimNonLeaf = DisableFPElimNonLeaf; + Options.AllowFPOpFusion = FuseFPOps; + Options.UnsafeFPMath = EnableUnsafeFPMath; + Options.NoInfsFPMath = EnableNoInfsFPMath; + Options.NoNaNsFPMath = EnableNoNaNsFPMath; + Options.HonorSignDependentRoundingFPMathOption = + EnableHonorSignDependentRoundingFPMath; + Options.UseSoftFloat = GenerateSoftFloatCalls; + if (FloatABIForCalls != FloatABI::Default) + Options.FloatABIType = FloatABIForCalls; + Options.NoZerosInBSS = DontPlaceZerosInBSS; + Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt; + Options.DisableTailCalls = DisableTailCalls; + Options.StackAlignmentOverride = OverrideStackAlignment; + Options.RealignStack = EnableRealignStack; + Options.TrapFuncName = TrapFuncName; + Options.PositionIndependentExecutable = EnablePIE; + Options.EnableSegmentedStacks = SegmentedStacks; + Options.UseInitArray = UseInitArray; + Options.SSPBufferSize = SSPBufferSize; +} + LTOModule *LTOModule::makeLTOModule(MemoryBuffer *buffer, std::string &errMsg) { static bool Initialized = false; @@ -145,23 +282,34 @@ LTOModule *LTOModule::makeLTOModule(MemoryBuffer *buffer, return NULL; } - std::string Triple = m->getTargetTriple(); - if (Triple.empty()) - Triple = sys::getDefaultTargetTriple(); + std::string TripleStr = m->getTargetTriple(); + if (TripleStr.empty()) + TripleStr = sys::getDefaultTargetTriple(); + llvm::Triple Triple(TripleStr); // find machine architecture for this module - const Target *march = TargetRegistry::lookupTarget(Triple, errMsg); + const Target *march = TargetRegistry::lookupTarget(TripleStr, errMsg); if (!march) return NULL; // construct LTOModule, hand over ownership of module and target SubtargetFeatures Features; - Features.getDefaultSubtargetFeatures(llvm::Triple(Triple)); + Features.getDefaultSubtargetFeatures(Triple); std::string FeatureStr = Features.getString(); + // Set a default CPU for Darwin triples. std::string CPU; - TargetMachine *target = march->createTargetMachine(Triple, CPU, FeatureStr); + if (Triple.isOSDarwin()) { + if (Triple.getArch() == llvm::Triple::x86_64) + CPU = "core2"; + else if (Triple.getArch() == llvm::Triple::x86) + CPU = "yonah"; + } + TargetOptions Options; + getTargetOptions(Options); + TargetMachine *target = march->createTargetMachine(TripleStr, CPU, FeatureStr, + Options); LTOModule *Ret = new LTOModule(m.take(), target); - if (Ret->ParseSymbols(errMsg)) { + if (Ret->parseSymbols(errMsg)) { delete Ret; return NULL; } @@ -169,28 +317,22 @@ LTOModule *LTOModule::makeLTOModule(MemoryBuffer *buffer, return Ret; } -const char *LTOModule::getTargetTriple() { - return _module->getTargetTriple().c_str(); -} - -void LTOModule::setTargetTriple(const char *triple) { - _module->setTargetTriple(triple); -} - -void LTOModule::addDefinedFunctionSymbol(Function *f) { - // add to list of defined symbols - addDefinedSymbol(f, true); +/// makeBuffer - Create a MemoryBuffer from a memory range. +MemoryBuffer *LTOModule::makeBuffer(const void *mem, size_t length) { + const char *startPtr = (const char*)mem; + return MemoryBuffer::getMemBuffer(StringRef(startPtr, length), "", false); } -// Get string that data pointer points to. -bool LTOModule::objcClassNameFromExpression(Constant *c, std::string &name) { - if (ConstantExpr *ce = dyn_cast(c)) { +/// objcClassNameFromExpression - Get string that the data pointer points to. +bool +LTOModule::objcClassNameFromExpression(const Constant *c, std::string &name) { + if (const ConstantExpr *ce = dyn_cast(c)) { Constant *op = ce->getOperand(0); if (GlobalVariable *gvn = dyn_cast(op)) { Constant *cn = gvn->getInitializer(); - if (ConstantArray *ca = dyn_cast(cn)) { + if (ConstantDataArray *ca = dyn_cast(cn)) { if (ca->isCString()) { - name = ".objc_class_name_" + ca->getAsCString(); + name = ".objc_class_name_" + ca->getAsCString().str(); return true; } } @@ -199,9 +341,9 @@ bool LTOModule::objcClassNameFromExpression(Constant *c, std::string &name) { return false; } -// Parse i386/ppc ObjC class data structure. -void LTOModule::addObjCClass(GlobalVariable *clgv) { - ConstantStruct *c = dyn_cast(clgv->getInitializer()); +/// addObjCClass - Parse i386/ppc ObjC class data structure. +void LTOModule::addObjCClass(const GlobalVariable *clgv) { + const ConstantStruct *c = dyn_cast(clgv->getInitializer()); if (!c) return; // second slot in __OBJC,__class is pointer to superclass name @@ -214,6 +356,8 @@ void LTOModule::addObjCClass(GlobalVariable *clgv) { const char *symbolName = entry.getKey().data(); info.name = symbolName; info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED; + info.isFunction = false; + info.symbol = clgv; entry.setValue(info); } } @@ -223,19 +367,20 @@ void LTOModule::addObjCClass(GlobalVariable *clgv) { if (objcClassNameFromExpression(c->getOperand(2), className)) { StringSet::value_type &entry = _defines.GetOrCreateValue(className); entry.setValue(1); + NameAndAttributes info; info.name = entry.getKey().data(); - info.attributes = lto_symbol_attributes(LTO_SYMBOL_PERMISSIONS_DATA | - LTO_SYMBOL_DEFINITION_REGULAR | - LTO_SYMBOL_SCOPE_DEFAULT); + info.attributes = LTO_SYMBOL_PERMISSIONS_DATA | + LTO_SYMBOL_DEFINITION_REGULAR | LTO_SYMBOL_SCOPE_DEFAULT; + info.isFunction = false; + info.symbol = clgv; _symbols.push_back(info); } } - -// Parse i386/ppc ObjC category data structure. -void LTOModule::addObjCCategory(GlobalVariable *clgv) { - ConstantStruct *c = dyn_cast(clgv->getInitializer()); +/// addObjCCategory - Parse i386/ppc ObjC category data structure. +void LTOModule::addObjCCategory(const GlobalVariable *clgv) { + const ConstantStruct *c = dyn_cast(clgv->getInitializer()); if (!c) return; // second slot in __OBJC,__category is pointer to target class name @@ -253,12 +398,13 @@ void LTOModule::addObjCCategory(GlobalVariable *clgv) { const char *symbolName = entry.getKey().data(); info.name = symbolName; info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED; + info.isFunction = false; + info.symbol = clgv; entry.setValue(info); } - -// Parse i386/ppc ObjC class list data structure. -void LTOModule::addObjCClassRef(GlobalVariable *clgv) { +/// addObjCClassRef - Parse i386/ppc ObjC class list data structure. +void LTOModule::addObjCClassRef(const GlobalVariable *clgv) { std::string targetclassName; if (!objcClassNameFromExpression(clgv->getInitializer(), targetclassName)) return; @@ -272,14 +418,19 @@ void LTOModule::addObjCClassRef(GlobalVariable *clgv) { const char *symbolName = entry.getKey().data(); info.name = symbolName; info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED; + info.isFunction = false; + info.symbol = clgv; entry.setValue(info); } - -void LTOModule::addDefinedDataSymbol(GlobalValue *v) { +/// addDefinedDataSymbol - Add a data symbol as defined to the list. +void LTOModule::addDefinedDataSymbol(const GlobalValue *v) { // Add to list of defined symbols. addDefinedSymbol(v, false); + if (!v->hasSection() /* || !isTargetDarwin */) + return; + // Special case i386/ppc ObjC data structures in magic sections: // The issue is that the old ObjC object format did some strange // contortions to avoid real linker symbols. For instance, the @@ -299,31 +450,37 @@ void LTOModule::addDefinedDataSymbol(GlobalValue *v) { // a class was missing. // The following synthesizes the implicit .objc_* symbols for the linker // from the ObjC data structures generated by the front end. - if (v->hasSection() /* && isTargetDarwin */) { - // special case if this data blob is an ObjC class definition - if (v->getSection().compare(0, 15, "__OBJC,__class,") == 0) { - if (GlobalVariable *gv = dyn_cast(v)) { - addObjCClass(gv); - } + + // special case if this data blob is an ObjC class definition + if (v->getSection().compare(0, 15, "__OBJC,__class,") == 0) { + if (const GlobalVariable *gv = dyn_cast(v)) { + addObjCClass(gv); } + } - // special case if this data blob is an ObjC category definition - else if (v->getSection().compare(0, 18, "__OBJC,__category,") == 0) { - if (GlobalVariable *gv = dyn_cast(v)) { - addObjCCategory(gv); - } + // special case if this data blob is an ObjC category definition + else if (v->getSection().compare(0, 18, "__OBJC,__category,") == 0) { + if (const GlobalVariable *gv = dyn_cast(v)) { + addObjCCategory(gv); } + } - // special case if this data blob is the list of referenced classes - else if (v->getSection().compare(0, 18, "__OBJC,__cls_refs,") == 0) { - if (GlobalVariable *gv = dyn_cast(v)) { - addObjCClassRef(gv); - } + // special case if this data blob is the list of referenced classes + else if (v->getSection().compare(0, 18, "__OBJC,__cls_refs,") == 0) { + if (const GlobalVariable *gv = dyn_cast(v)) { + addObjCClassRef(gv); } } } -void LTOModule::addDefinedSymbol(GlobalValue *def, bool isFunction) { +/// addDefinedFunctionSymbol - Add a function symbol as defined to the list. +void LTOModule::addDefinedFunctionSymbol(const Function *f) { + // add to list of defined symbols + addDefinedSymbol(f, true); +} + +/// addDefinedSymbol - Add a defined symbol to the list. +void LTOModule::addDefinedSymbol(const GlobalValue *def, bool isFunction) { // ignore all llvm.* symbols if (def->getName().startswith("llvm.")) return; @@ -334,13 +491,13 @@ void LTOModule::addDefinedSymbol(GlobalValue *def, bool isFunction) { // set alignment part log2() can have rounding errors uint32_t align = def->getAlignment(); - uint32_t attr = align ? CountTrailingZeros_32(def->getAlignment()) : 0; + uint32_t attr = align ? countTrailingZeros(def->getAlignment()) : 0; // set permissions part - if (isFunction) + if (isFunction) { attr |= LTO_SYMBOL_PERMISSIONS_CODE; - else { - GlobalVariable *gv = dyn_cast(def); + } else { + const GlobalVariable *gv = dyn_cast(def); if (gv && gv->isConstant()) attr |= LTO_SYMBOL_PERMISSIONS_RODATA; else @@ -349,8 +506,7 @@ void LTOModule::addDefinedSymbol(GlobalValue *def, bool isFunction) { // set definition part if (def->hasWeakLinkage() || def->hasLinkOnceLinkage() || - def->hasLinkerPrivateWeakLinkage() || - def->hasLinkerPrivateWeakDefAutoLinkage()) + def->hasLinkerPrivateWeakLinkage()) attr |= LTO_SYMBOL_DEFINITION_WEAK; else if (def->hasCommonLinkage()) attr |= LTO_SYMBOL_DEFINITION_TENTATIVE; @@ -366,23 +522,29 @@ void LTOModule::addDefinedSymbol(GlobalValue *def, bool isFunction) { def->hasLinkOnceLinkage() || def->hasCommonLinkage() || def->hasLinkerPrivateWeakLinkage()) attr |= LTO_SYMBOL_SCOPE_DEFAULT; - else if (def->hasLinkerPrivateWeakDefAutoLinkage()) + else if (def->hasLinkOnceODRAutoHideLinkage()) attr |= LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN; else attr |= LTO_SYMBOL_SCOPE_INTERNAL; - // add to table of symbols - NameAndAttributes info; StringSet::value_type &entry = _defines.GetOrCreateValue(Buffer); entry.setValue(1); + // fill information structure + NameAndAttributes info; StringRef Name = entry.getKey(); info.name = Name.data(); assert(info.name[Name.size()] == '\0'); - info.attributes = (lto_symbol_attributes)attr; + info.attributes = attr; + info.isFunction = isFunction; + info.symbol = def; + + // add to table of symbols _symbols.push_back(info); } +/// addAsmGlobalSymbol - Add a global symbol from module-level ASM to the +/// defined list. void LTOModule::addAsmGlobalSymbol(const char *name, lto_symbol_attributes scope) { StringSet::value_type &entry = _defines.GetOrCreateValue(name); @@ -392,15 +554,41 @@ void LTOModule::addAsmGlobalSymbol(const char *name, return; entry.setValue(1); - const char *symbolName = entry.getKey().data(); - uint32_t attr = LTO_SYMBOL_DEFINITION_REGULAR; - attr |= scope; - NameAndAttributes info; - info.name = symbolName; - info.attributes = (lto_symbol_attributes)attr; - _symbols.push_back(info); + + NameAndAttributes &info = _undefines[entry.getKey().data()]; + + if (info.symbol == 0) { + // FIXME: This is trying to take care of module ASM like this: + // + // module asm ".zerofill __FOO, __foo, _bar_baz_qux, 0" + // + // but is gross and its mother dresses it funny. Have the ASM parser give us + // more details for this type of situation so that we're not guessing so + // much. + + // fill information structure + info.name = entry.getKey().data(); + info.attributes = + LTO_SYMBOL_PERMISSIONS_DATA | LTO_SYMBOL_DEFINITION_REGULAR | scope; + info.isFunction = false; + info.symbol = 0; + + // add to table of symbols + _symbols.push_back(info); + return; + } + + if (info.isFunction) + addDefinedFunctionSymbol(cast(info.symbol)); + else + addDefinedDataSymbol(info.symbol); + + _symbols.back().attributes &= ~LTO_SYMBOL_SCOPE_MASK; + _symbols.back().attributes |= scope; } +/// addAsmGlobalSymbolUndef - Add a global symbol from module-level ASM to the +/// undefined list. void LTOModule::addAsmGlobalSymbolUndef(const char *name) { StringMap::value_type &entry = _undefines.GetOrCreateValue(name); @@ -415,12 +603,17 @@ void LTOModule::addAsmGlobalSymbolUndef(const char *name) { attr |= LTO_SYMBOL_SCOPE_DEFAULT; NameAndAttributes info; info.name = entry.getKey().data(); - info.attributes = (lto_symbol_attributes)attr; + info.attributes = attr; + info.isFunction = false; + info.symbol = 0; entry.setValue(info); } -void LTOModule::addPotentialUndefinedSymbol(GlobalValue *decl) { +/// addPotentialUndefinedSymbol - Add a symbol which isn't defined just yet to a +/// list to be resolved later. +void +LTOModule::addPotentialUndefinedSymbol(const GlobalValue *decl, bool isFunc) { // ignore all llvm.* symbols if (decl->getName().startswith("llvm.")) return; @@ -442,18 +635,22 @@ void LTOModule::addPotentialUndefinedSymbol(GlobalValue *decl) { NameAndAttributes info; info.name = entry.getKey().data(); + if (decl->hasExternalWeakLinkage()) info.attributes = LTO_SYMBOL_DEFINITION_WEAKUNDEF; else info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED; + info.isFunction = isFunc; + info.symbol = decl; + entry.setValue(info); } namespace { class RecordStreamer : public MCStreamer { public: - enum State { NeverSeen, Global, Defined, DefinedGlobal, Used}; + enum State { NeverSeen, Global, Defined, DefinedGlobal, Used }; private: StringMap Symbols; @@ -540,16 +737,22 @@ namespace { return Symbols.end(); } - RecordStreamer(MCContext &Context) : MCStreamer(Context) {} + RecordStreamer(MCContext &Context) + : MCStreamer(SK_RecordStreamer, Context) {} - virtual void ChangeSection(const MCSection *Section) {} - virtual void InitSections() {} + virtual void EmitInstruction(const MCInst &Inst) { + // Scan for values. + for (unsigned i = Inst.getNumOperands(); i--; ) + if (Inst.getOperand(i).isExpr()) + AddValueSymbols(Inst.getOperand(i).getExpr()); + } virtual void EmitLabel(MCSymbol *Symbol) { - Symbol->setSection(*getCurrentSection()); + Symbol->setSection(*getCurrentSection().first); markDefined(*Symbol); } - virtual void EmitAssemblerFlag(MCAssemblerFlag Flag) {} - virtual void EmitThumbFunc(MCSymbol *Func) {} + virtual void EmitDebugLabel(MCSymbol *Symbol) { + EmitLabel(Symbol); + } virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) { // FIXME: should we handle aliases? markDefined(*Symbol); @@ -558,28 +761,39 @@ namespace { if (Attribute == MCSA_Global) markGlobal(*Symbol); } - virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {} - virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {} - virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol) {} - virtual void EmitCOFFSymbolStorageClass(int StorageClass) {} virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol, - unsigned Size , unsigned ByteAlignment) { + uint64_t Size , unsigned ByteAlignment) { markDefined(*Symbol); } - virtual void EmitCOFFSymbolType(int Type) {} - virtual void EndCOFFSymbolDef() {} virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, unsigned ByteAlignment) { markDefined(*Symbol); } + + virtual void EmitBundleAlignMode(unsigned AlignPow2) {} + virtual void EmitBundleLock(bool AlignToEnd) {} + virtual void EmitBundleUnlock() {} + + // Noop calls. + virtual void ChangeSection(const MCSection *Section, + const MCExpr *Subsection) {} + virtual void InitToTextSection() {} + virtual void InitSections() {} + virtual void EmitAssemblerFlag(MCAssemblerFlag Flag) {} + virtual void EmitThumbFunc(MCSymbol *Func) {} + virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {} + virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {} + virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol) {} + virtual void EmitCOFFSymbolStorageClass(int StorageClass) {} + virtual void EmitCOFFSymbolType(int Type) {} + virtual void EndCOFFSymbolDef() {} virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {} virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, unsigned ByteAlignment) {} virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol, uint64_t Size, unsigned ByteAlignment) {} - virtual void EmitBytes(StringRef Data, unsigned AddrSpace) {} - virtual void EmitValueImpl(const MCExpr *Value, unsigned Size, - unsigned AddrSpace) {} + virtual void EmitBytes(StringRef Data) {} + virtual void EmitValueImpl(const MCExpr *Value, unsigned Size) {} virtual void EmitULEB128Value(const MCExpr *Value) {} virtual void EmitSLEB128Value(const MCExpr *Value) {} virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value, @@ -587,24 +801,23 @@ namespace { unsigned MaxBytesToEmit) {} virtual void EmitCodeAlignment(unsigned ByteAlignment, unsigned MaxBytesToEmit) {} - virtual void EmitValueToOffset(const MCExpr *Offset, - unsigned char Value ) {} + virtual bool EmitValueToOffset(const MCExpr *Offset, + unsigned char Value ) { return false; } virtual void EmitFileDirective(StringRef Filename) {} virtual void EmitDwarfAdvanceLineAddr(int64_t LineDelta, const MCSymbol *LastLabel, const MCSymbol *Label, unsigned PointerSize) {} + virtual void FinishImpl() {} - virtual void EmitInstruction(const MCInst &Inst) { - // Scan for values. - for (unsigned i = Inst.getNumOperands(); i--; ) - if (Inst.getOperand(i).isExpr()) - AddValueSymbols(Inst.getOperand(i).getExpr()); + static bool classof(const MCStreamer *S) { + return S->getKind() == SK_RecordStreamer; } - virtual void Finish() {} }; -} +} // end anonymous namespace +/// addAsmGlobalSymbols - Add global symbols from module-level ASM to the +/// defined or undefined lists. bool LTOModule::addAsmGlobalSymbols(std::string &errMsg) { const std::string &inlineAsm = _module->getModuleInlineAsm(); if (inlineAsm.empty()) @@ -617,21 +830,20 @@ bool LTOModule::addAsmGlobalSymbols(std::string &errMsg) { OwningPtr Parser(createMCAsmParser(SrcMgr, _context, *Streamer, *_target->getMCAsmInfo())); - OwningPtr STI(_target->getTarget(). - createMCSubtargetInfo(_target->getTargetTriple(), - _target->getTargetCPU(), - _target->getTargetFeatureString())); - OwningPtr - TAP(_target->getTarget().createMCAsmParser(*STI, *Parser.get())); + const Target &T = _target->getTarget(); + OwningPtr + STI(T.createMCSubtargetInfo(_target->getTargetTriple(), + _target->getTargetCPU(), + _target->getTargetFeatureString())); + OwningPtr TAP(T.createMCAsmParser(*STI, *Parser.get())); if (!TAP) { - errMsg = "target " + std::string(_target->getTarget().getName()) + - " does not define AsmParser."; + errMsg = "target " + std::string(T.getName()) + + " does not define AsmParser."; return true; } Parser->setTargetParser(*TAP); - int Res = Parser->Run(false); - if (Res) + if (Parser->Run(false)) return true; for (RecordStreamer::const_iterator i = Streamer->begin(), @@ -646,26 +858,28 @@ bool LTOModule::addAsmGlobalSymbols(std::string &errMsg) { Value == RecordStreamer::Used) addAsmGlobalSymbolUndef(Key.data()); } + return false; } +/// isDeclaration - Return 'true' if the global value is a declaration. static bool isDeclaration(const GlobalValue &V) { if (V.hasAvailableExternallyLinkage()) return true; + if (V.isMaterializable()) return false; - return V.isDeclaration(); -} -static bool isAliasToDeclaration(const GlobalAlias &V) { - return isDeclaration(*V.getAliasedGlobal()); + return V.isDeclaration(); } -bool LTOModule::ParseSymbols(std::string &errMsg) { +/// parseSymbols - Parse the symbols from the module and model-level ASM and add +/// them to either the defined or undefined lists. +bool LTOModule::parseSymbols(std::string &errMsg) { // add functions - for (Module::iterator f = _module->begin(); f != _module->end(); ++f) { + for (Module::iterator f = _module->begin(), e = _module->end(); f != e; ++f) { if (isDeclaration(*f)) - addPotentialUndefinedSymbol(f); + addPotentialUndefinedSymbol(f, true); else addDefinedFunctionSymbol(f); } @@ -674,7 +888,7 @@ bool LTOModule::ParseSymbols(std::string &errMsg) { for (Module::global_iterator v = _module->global_begin(), e = _module->global_end(); v != e; ++v) { if (isDeclaration(*v)) - addPotentialUndefinedSymbol(v); + addPotentialUndefinedSymbol(v, false); else addDefinedDataSymbol(v); } @@ -684,41 +898,24 @@ bool LTOModule::ParseSymbols(std::string &errMsg) { return true; // add aliases - for (Module::alias_iterator i = _module->alias_begin(), - e = _module->alias_end(); i != e; ++i) { - if (isAliasToDeclaration(*i)) - addPotentialUndefinedSymbol(i); + for (Module::alias_iterator a = _module->alias_begin(), + e = _module->alias_end(); a != e; ++a) { + if (isDeclaration(*a->getAliasedGlobal())) + // Is an alias to a declaration. + addPotentialUndefinedSymbol(a, false); else - addDefinedDataSymbol(i); + addDefinedDataSymbol(a); } // make symbols for all undefines - for (StringMap::iterator it=_undefines.begin(); - it != _undefines.end(); ++it) { - // if this symbol also has a definition, then don't make an undefine - // because it is a tentative definition - if (_defines.count(it->getKey()) == 0) { - NameAndAttributes info = it->getValue(); - _symbols.push_back(info); - } + for (StringMap::iterator u =_undefines.begin(), + e = _undefines.end(); u != e; ++u) { + // If this symbol also has a definition, then don't make an undefine because + // it is a tentative definition. + if (_defines.count(u->getKey())) continue; + NameAndAttributes info = u->getValue(); + _symbols.push_back(info); } - return false; -} -uint32_t LTOModule::getSymbolCount() { - return _symbols.size(); -} - -lto_symbol_attributes LTOModule::getSymbolAttributes(uint32_t index) { - if (index < _symbols.size()) - return _symbols[index].attributes; - else - return lto_symbol_attributes(0); -} - -const char *LTOModule::getSymbolName(uint32_t index) { - if (index < _symbols.size()) - return _symbols[index].name; - else - return NULL; + return false; }