//===----------------------------------------------------------------------===//
#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/Constants.h"
+#include "llvm/LLVMContext.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/Module.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Host.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<bool>
+EnableFPMAD("enable-fp-mad",
+ cl::desc("Enable less precise MAD instructions to be generated"),
+ cl::init(false));
+
+static cl::opt<bool>
+DisableFPElim("disable-fp-elim",
+ cl::desc("Disable frame pointer elimination optimization"),
+ cl::init(false));
+
+static cl::opt<bool>
+DisableFPElimNonLeaf("disable-non-leaf-fp-elim",
+ cl::desc("Disable frame pointer elimination optimization for non-leaf funcs"),
+ cl::init(false));
+
+static cl::opt<bool>
+EnableUnsafeFPMath("enable-unsafe-fp-math",
+ cl::desc("Enable optimizations that may decrease FP precision"),
+ cl::init(false));
+
+static cl::opt<bool>
+EnableNoInfsFPMath("enable-no-infs-fp-math",
+ cl::desc("Enable FP math optimizations that assume no +-Infs"),
+ cl::init(false));
+
+static cl::opt<bool>
+EnableNoNaNsFPMath("enable-no-nans-fp-math",
+ cl::desc("Enable FP math optimizations that assume no NaNs"),
+ cl::init(false));
+
+static cl::opt<bool>
+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<bool>
+GenerateSoftFloatCalls("soft-float",
+ cl::desc("Generate software floating point library calls"),
+ cl::init(false));
+
+static cl::opt<llvm::FloatABI::ABIType>
+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<llvm::FPOpFusion::FPOpFusionMode>
+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<bool>
+DontPlaceZerosInBSS("nozero-initialized-in-bss",
+ cl::desc("Don't place zero-initialized symbols into bss section"),
+ cl::init(false));
+
+static cl::opt<bool>
+EnableGuaranteedTailCallOpt("tailcallopt",
+ cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."),
+ cl::init(false));
+
+static cl::opt<bool>
+DisableTailCalls("disable-tail-calls",
+ cl::desc("Never emit tail calls"),
+ cl::init(false));
+
+static cl::opt<unsigned>
+OverrideStackAlignment("stack-alignment",
+ cl::desc("Override default stack alignment"),
+ cl::init(0));
+
+static cl::opt<bool>
+EnableRealignStack("realign-stack",
+ cl::desc("Realign stack if needed"),
+ cl::init(true));
+
+static cl::opt<std::string>
+TrapFuncName("trap-func", cl::Hidden,
+ cl::desc("Emit a call to trap function rather than a trap instruction"),
+ cl::init(""));
+
+static cl::opt<bool>
+EnablePIE("enable-pie",
+ cl::desc("Assume the creation of a position independent executable."),
+ cl::init(false));
+
+static cl::opt<bool>
+SegmentedStacks("segmented-stacks",
+ cl::desc("Use segmented stacks if possible."),
+ cl::init(false));
+
+static cl::opt<bool>
+UseInitArray("use-init-array",
+ cl::desc("Use .init_array instead of .ctors."),
+ cl::init(false));
+
+static cl::opt<unsigned>
+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, *_target->getDataLayout()) {}
+
+/// 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)
+ return llvm::sys::IdentifyFileType((const char*)mem, length)
== llvm::sys::Bitcode_FileType;
}
return llvm::sys::Path(path).isBitcodeFile();
}
+/// 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);
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<MemoryBuffer> buffer;
if (error_code ec = MemoryBuffer::getFile(path, buffer)) {
errMsg = ec.message();
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<MemoryBuffer> buffer(makeBuffer(mem, 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;
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;
+ if (Triple.isOSDarwin()) {
+ if (Triple.getArch() == llvm::Triple::x86_64)
+ CPU = "core2";
+ else if (Triple.getArch() == llvm::Triple::x86)
+ CPU = "yonah";
+ }
TargetOptions Options;
- TargetMachine *target = march->createTargetMachine(Triple, CPU, FeatureStr,
+ 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;
}
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.
+/// objcClassNameFromExpression - Get string that the data pointer points to.
bool LTOModule::objcClassNameFromExpression(Constant *c, std::string &name) {
if (ConstantExpr *ce = dyn_cast<ConstantExpr>(c)) {
Constant *op = ce->getOperand(0);
return false;
}
-// Parse i386/ppc ObjC class data structure.
+/// addObjCClass - Parse i386/ppc ObjC class data structure.
void LTOModule::addObjCClass(GlobalVariable *clgv) {
ConstantStruct *c = dyn_cast<ConstantStruct>(clgv->getInitializer());
if (!c) return;
const char *symbolName = entry.getKey().data();
info.name = symbolName;
info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
+ info.isFunction = false;
+ info.symbol = clgv;
entry.setValue(info);
}
}
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.
+/// addObjCCategory - Parse i386/ppc ObjC category data structure.
void LTOModule::addObjCCategory(GlobalVariable *clgv) {
ConstantStruct *c = dyn_cast<ConstantStruct>(clgv->getInitializer());
if (!c) return;
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.
+/// addObjCClassRef - Parse i386/ppc ObjC class list data structure.
void LTOModule::addObjCClassRef(GlobalVariable *clgv) {
std::string targetclassName;
if (!objcClassNameFromExpression(clgv->getInitializer(), targetclassName))
const char *symbolName = entry.getKey().data();
info.name = symbolName;
info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
+ info.isFunction = false;
+ info.symbol = clgv;
entry.setValue(info);
}
-
+/// addDefinedDataSymbol - Add a data symbol as defined to the list.
void LTOModule::addDefinedDataSymbol(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
// 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<GlobalVariable>(v)) {
- addObjCClass(gv);
- }
+
+ // 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<GlobalVariable>(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<GlobalVariable>(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 (GlobalVariable *gv = dyn_cast<GlobalVariable>(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<GlobalVariable>(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 (GlobalVariable *gv = dyn_cast<GlobalVariable>(v)) {
+ addObjCClassRef(gv);
}
}
}
+/// addDefinedFunctionSymbol - Add a function symbol as defined to the list.
+void LTOModule::addDefinedFunctionSymbol(Function *f) {
+ // add to list of defined symbols
+ addDefinedSymbol(f, true);
+}
+
+/// addDefinedSymbol - Add a defined symbol to the list.
void LTOModule::addDefinedSymbol(GlobalValue *def, bool isFunction) {
// ignore all llvm.* symbols
if (def->getName().startswith("llvm."))
uint32_t attr = align ? CountTrailingZeros_32(def->getAlignment()) : 0;
// set permissions part
- if (isFunction)
+ if (isFunction) {
attr |= LTO_SYMBOL_PERMISSIONS_CODE;
- else {
+ } else {
GlobalVariable *gv = dyn_cast<GlobalVariable>(def);
if (gv && gv->isConstant())
attr |= LTO_SYMBOL_PERMISSIONS_RODATA;
// 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;
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);
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<Function>(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<NameAndAttributes>::value_type &entry =
_undefines.GetOrCreateValue(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(GlobalValue *decl, bool isFunc) {
// ignore all llvm.* symbols
if (decl->getName().startswith("llvm."))
return;
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<State> Symbols;
RecordStreamer(MCContext &Context) : MCStreamer(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());
markDefined(*Symbol);
}
- virtual void EmitAssemblerFlag(MCAssemblerFlag Flag) {}
- virtual void EmitThumbFunc(MCSymbol *Func) {}
virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
// FIXME: should we handle aliases?
markDefined(*Symbol);
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);
}
+
+ // Noop calls.
+ virtual void ChangeSection(const MCSection *Section) {}
+ 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) {}
const MCSymbol *LastLabel,
const MCSymbol *Label,
unsigned PointerSize) {}
-
- 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 FinishImpl() {}
};
-}
+} // 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())
OwningPtr<MCAsmParser> Parser(createMCAsmParser(SrcMgr,
_context, *Streamer,
*_target->getMCAsmInfo()));
- OwningPtr<MCSubtargetInfo> STI(_target->getTarget().
- createMCSubtargetInfo(_target->getTargetTriple(),
- _target->getTargetCPU(),
- _target->getTargetFeatureString()));
- OwningPtr<MCTargetAsmParser>
- TAP(_target->getTarget().createMCAsmParser(*STI, *Parser.get()));
+ const Target &T = _target->getTarget();
+ OwningPtr<MCSubtargetInfo>
+ STI(T.createMCSubtargetInfo(_target->getTargetTriple(),
+ _target->getTargetCPU(),
+ _target->getTargetFeatureString()));
+ OwningPtr<MCTargetAsmParser> 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(),
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);
}
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);
}
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<NameAndAttributes>::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<NameAndAttributes>::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;
}
projects / oota-llvm.git / blobdiff