-//===-LTOModule.cpp - LLVM Link Time Optimizer ----------------------------===//
+//===-- LTOModule.cpp - LLVM Link Time Optimizer --------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
-//
+//
//===----------------------------------------------------------------------===//
//
-// This file implements the Link Time Optimization library. This library is
+// This file implements the Link Time Optimization library. This library is
// intended to be used by linker to optimize code at link time.
//
//===----------------------------------------------------------------------===//
#include "LTOModule.h"
-
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/Bitcode/ReaderWriter.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/MCTargetAsmParser.h"
+#include "llvm/MC/SubtargetFeature.h"
#include "llvm/Module.h"
-#include "llvm/ModuleProvider.h"
-#include "llvm/ADT/OwningPtr.h"
-#include "llvm/Bitcode/ReaderWriter.h"
-#include "llvm/Support/SystemUtils.h"
-#include "llvm/Support/Mangler.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Host.h"
#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/MathExtras.h"
-#include "llvm/System/Path.h"
-#include "llvm/System/Process.h"
-#include "llvm/Target/SubtargetFeature.h"
-#include "llvm/Target/TargetAsmInfo.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetRegistry.h"
-#include "llvm/Target/TargetSelect.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;
-bool LTOModule::isBitcodeFile(const void* mem, size_t length)
-{
- return ( llvm::sys::IdentifyFileType((char*)mem, length)
- == llvm::sys::Bitcode_FileType );
+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((const char*)mem, length)
+ == llvm::sys::Bitcode_FileType;
}
-bool LTOModule::isBitcodeFile(const char* path)
-{
- return llvm::sys::Path(path).isBitcodeFile();
+bool LTOModule::isBitcodeFile(const char *path) {
+ return llvm::sys::Path(path).isBitcodeFile();
}
-bool LTOModule::isBitcodeFileForTarget(const void* mem, size_t length,
- const char* triplePrefix)
-{
- MemoryBuffer* buffer = makeBuffer(mem, length);
- if ( buffer == NULL )
- return false;
- return isTargetMatch(buffer, triplePrefix);
+/// 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);
+ if (!buffer)
+ return false;
+ return isTargetMatch(buffer, triplePrefix);
}
-
-bool LTOModule::isBitcodeFileForTarget(const char* path,
- const char* triplePrefix)
-{
- MemoryBuffer *buffer = MemoryBuffer::getFile(path);
- if (buffer == NULL)
- return false;
- return isTargetMatch(buffer, triplePrefix);
+bool LTOModule::isBitcodeFileForTarget(const char *path,
+ const char *triplePrefix) {
+ OwningPtr<MemoryBuffer> buffer;
+ if (MemoryBuffer::getFile(path, buffer))
+ return false;
+ return isTargetMatch(buffer.take(), triplePrefix);
}
-// takes ownership of buffer
-bool LTOModule::isTargetMatch(MemoryBuffer* buffer, const char* triplePrefix)
-{
- OwningPtr<ModuleProvider> mp(getBitcodeModuleProvider(buffer,
- getGlobalContext()));
- // on success, mp owns buffer and both are deleted at end of this method
- if ( !mp ) {
- delete buffer;
- return false;
- }
- std::string actualTarget = mp->getModule()->getTargetTriple();
- return ( strncmp(actualTarget.c_str(), triplePrefix,
- strlen(triplePrefix)) == 0);
+/// 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), _symbolsParsed(false)
-{
+/// 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 NULL;
+ }
+ return makeLTOModule(buffer.take(), errMsg);
}
-LTOModule* LTOModule::makeLTOModule(const char* path,
- std::string& errMsg)
-{
- OwningPtr<MemoryBuffer> buffer(MemoryBuffer::getFile(path, &errMsg));
- if ( !buffer )
- return NULL;
- return makeLTOModule(buffer.get(), errMsg);
+LTOModule *LTOModule::makeLTOModule(int fd, const char *path,
+ size_t size, std::string &errMsg) {
+ return makeLTOModule(fd, path, size, size, 0, errMsg);
}
-/// makeBuffer - create a MemoryBuffer from a memory range.
-/// MemoryBuffer requires the byte past end of the buffer to be a zero.
-/// We might get lucky and already be that way, otherwise make a copy.
-/// Also if next byte is on a different page, don't assume it is readable.
-MemoryBuffer* LTOModule::makeBuffer(const void* mem, size_t length)
-{
- const char* startPtr = (char*)mem;
- const char* endPtr = startPtr+length;
- if ( (((uintptr_t)endPtr & (sys::Process::GetPageSize()-1)) == 0)
- || (*endPtr != 0) )
- return MemoryBuffer::getMemBufferCopy(startPtr, endPtr);
- else
- return MemoryBuffer::getMemBuffer(startPtr, endPtr);
+LTOModule *LTOModule::makeLTOModule(int fd, const char *path,
+ size_t file_size,
+ size_t map_size,
+ off_t offset,
+ std::string &errMsg) {
+ OwningPtr<MemoryBuffer> buffer;
+ if (error_code ec = MemoryBuffer::getOpenFile(fd, path, buffer, file_size,
+ map_size, offset, false)) {
+ errMsg = ec.message();
+ return NULL;
+ }
+ return makeLTOModule(buffer.take(), errMsg);
}
-
-LTOModule* LTOModule::makeLTOModule(const void* mem, size_t length,
- std::string& errMsg)
-{
- OwningPtr<MemoryBuffer> buffer(makeBuffer(mem, length));
- if ( !buffer )
- return NULL;
- return makeLTOModule(buffer.get(), errMsg);
+LTOModule *LTOModule::makeLTOModule(const void *mem, size_t length,
+ std::string &errMsg) {
+ OwningPtr<MemoryBuffer> buffer(makeBuffer(mem, length));
+ if (!buffer)
+ return NULL;
+ return makeLTOModule(buffer.take(), errMsg);
}
-/// getFeatureString - Return a string listing the features associated with the
-/// target triple.
-///
-/// FIXME: This is an inelegant way of specifying the features of a
-/// subtarget. It would be better if we could encode this information into the
-/// IR. See <rdar://5972456>.
-std::string getFeatureString(const char *TargetTriple) {
- InitializeAllTargets();
-
- SubtargetFeatures Features;
+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;
+}
- if (strncmp(TargetTriple, "powerpc-apple-", 14) == 0) {
- Features.AddFeature("altivec", true);
- } else if (strncmp(TargetTriple, "powerpc64-apple-", 16) == 0) {
- Features.AddFeature("64bit", true);
- Features.AddFeature("altivec", true);
+LTOModule *LTOModule::makeLTOModule(MemoryBuffer *buffer,
+ std::string &errMsg) {
+ static bool Initialized = false;
+ if (!Initialized) {
+ InitializeAllTargets();
+ InitializeAllTargetMCs();
+ InitializeAllAsmParsers();
+ Initialized = true;
}
- return Features.getString();
-}
+ // parse bitcode buffer
+ OwningPtr<Module> m(getLazyBitcodeModule(buffer, getGlobalContext(),
+ &errMsg));
+ if (!m) {
+ delete buffer;
+ return NULL;
+ }
-LTOModule* LTOModule::makeLTOModule(MemoryBuffer* buffer,
- std::string& errMsg)
-{
- InitializeAllTargets();
+ std::string TripleStr = m->getTargetTriple();
+ if (TripleStr.empty())
+ TripleStr = sys::getDefaultTargetTriple();
+ llvm::Triple Triple(TripleStr);
- // parse bitcode buffer
- OwningPtr<Module> m(ParseBitcodeFile(buffer, getGlobalContext(), &errMsg));
- if ( !m )
- return NULL;
- // find machine architecture for this module
- const Target* march = TargetRegistry::lookupTarget(m->getTargetTriple(),
- /*FallbackToHost=*/true,
- /*RequireJIT=*/false,
- errMsg);
- if ( march == NULL )
- return NULL;
-
- // construct LTModule, hand over ownership of module and target
- std::string FeatureStr = getFeatureString(m->getTargetTriple().c_str());
- TargetMachine* target = march->createTargetMachine(*m, FeatureStr);
- return new LTOModule(m.take(), target);
-}
+ // find machine architecture for this module
+ const Target *march = TargetRegistry::lookupTarget(TripleStr, errMsg);
+ if (!march)
+ return NULL;
+ // construct LTOModule, hand over ownership of module and target
+ SubtargetFeatures Features;
+ 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;
+ getTargetOptions(Options);
+ TargetMachine *target = march->createTargetMachine(TripleStr, CPU, FeatureStr,
+ Options);
+ LTOModule *Ret = new LTOModule(m.take(), target);
+ if (Ret->parseSymbols(errMsg)) {
+ delete Ret;
+ return NULL;
+ }
-const char* LTOModule::getTargetTriple()
-{
- return _module->getTargetTriple().c_str();
+ return Ret;
}
-void LTOModule::addDefinedFunctionSymbol(Function* f, Mangler &mangler)
-{
- // add to list of defined symbols
- addDefinedSymbol(f, mangler, true);
-
- // add external symbols referenced by this function.
- for (Function::iterator b = f->begin(); b != f->end(); ++b) {
- for (BasicBlock::iterator i = b->begin(); i != b->end(); ++i) {
- for (unsigned count = 0, total = i->getNumOperands();
- count != total; ++count) {
- findExternalRefs(i->getOperand(count), mangler);
- }
- }
- }
+/// 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<ConstantExpr>(c)) {
- Constant* op = ce->getOperand(0);
- if (GlobalVariable* gvn = dyn_cast<GlobalVariable>(op)) {
- Constant* cn = gvn->getInitializer();
- if (ConstantArray* ca = dyn_cast<ConstantArray>(cn)) {
- if ( ca->isCString() ) {
- name = ".objc_class_name_" + ca->getAsString();
- return true;
- }
- }
+/// 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);
+ if (GlobalVariable *gvn = dyn_cast<GlobalVariable>(op)) {
+ Constant *cn = gvn->getInitializer();
+ if (ConstantDataArray *ca = dyn_cast<ConstantDataArray>(cn)) {
+ if (ca->isCString()) {
+ name = ".objc_class_name_" + ca->getAsCString().str();
+ return true;
}
+ }
}
- return false;
+ }
+ return false;
}
-// parse i386/ppc ObjC class data structure
-void LTOModule::addObjCClass(GlobalVariable* clgv)
-{
- if (ConstantStruct* c = dyn_cast<ConstantStruct>(clgv->getInitializer())) {
- // second slot in __OBJC,__class is pointer to superclass name
- std::string superclassName;
- if ( objcClassNameFromExpression(c->getOperand(1), superclassName) ) {
- NameAndAttributes info;
- if ( _undefines.find(superclassName.c_str()) == _undefines.end() ) {
- const char* symbolName = ::strdup(superclassName.c_str());
- info.name = ::strdup(symbolName);
- info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
- // string is owned by _undefines
- _undefines[info.name] = info;
- }
- }
- // third slot in __OBJC,__class is pointer to class name
- std::string className;
- if ( objcClassNameFromExpression(c->getOperand(2), className) ) {
- const char* symbolName = ::strdup(className.c_str());
- NameAndAttributes info;
- info.name = symbolName;
- info.attributes = (lto_symbol_attributes)
- (LTO_SYMBOL_PERMISSIONS_DATA |
- LTO_SYMBOL_DEFINITION_REGULAR |
- LTO_SYMBOL_SCOPE_DEFAULT);
- _symbols.push_back(info);
- _defines[info.name] = 1;
- }
+/// addObjCClass - Parse i386/ppc ObjC class data structure.
+void LTOModule::addObjCClass(GlobalVariable *clgv) {
+ ConstantStruct *c = dyn_cast<ConstantStruct>(clgv->getInitializer());
+ if (!c) return;
+
+ // second slot in __OBJC,__class is pointer to superclass name
+ std::string superclassName;
+ if (objcClassNameFromExpression(c->getOperand(1), superclassName)) {
+ NameAndAttributes info;
+ StringMap<NameAndAttributes>::value_type &entry =
+ _undefines.GetOrCreateValue(superclassName);
+ if (!entry.getValue().name) {
+ const char *symbolName = entry.getKey().data();
+ info.name = symbolName;
+ info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
+ info.isFunction = false;
+ info.symbol = clgv;
+ entry.setValue(info);
}
-}
+ }
+ // third slot in __OBJC,__class is pointer to class name
+ std::string className;
+ if (objcClassNameFromExpression(c->getOperand(2), className)) {
+ StringSet::value_type &entry = _defines.GetOrCreateValue(className);
+ entry.setValue(1);
-// parse i386/ppc ObjC category data structure
-void LTOModule::addObjCCategory(GlobalVariable* clgv)
-{
- if (ConstantStruct* c = dyn_cast<ConstantStruct>(clgv->getInitializer())) {
- // second slot in __OBJC,__category is pointer to target class name
- std::string targetclassName;
- if ( objcClassNameFromExpression(c->getOperand(1), targetclassName) ) {
- NameAndAttributes info;
- if ( _undefines.find(targetclassName.c_str()) == _undefines.end() ){
- const char* symbolName = ::strdup(targetclassName.c_str());
- info.name = ::strdup(symbolName);
- info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
- // string is owned by _undefines
- _undefines[info.name] = info;
- }
- }
- }
+ NameAndAttributes info;
+ info.name = entry.getKey().data();
+ info.attributes = LTO_SYMBOL_PERMISSIONS_DATA |
+ LTO_SYMBOL_DEFINITION_REGULAR | LTO_SYMBOL_SCOPE_DEFAULT;
+ info.isFunction = false;
+ info.symbol = clgv;
+ _symbols.push_back(info);
+ }
}
+/// addObjCCategory - Parse i386/ppc ObjC category data structure.
+void LTOModule::addObjCCategory(GlobalVariable *clgv) {
+ ConstantStruct *c = dyn_cast<ConstantStruct>(clgv->getInitializer());
+ if (!c) return;
+
+ // second slot in __OBJC,__category is pointer to target class name
+ std::string targetclassName;
+ if (!objcClassNameFromExpression(c->getOperand(1), targetclassName))
+ return;
+
+ NameAndAttributes info;
+ StringMap<NameAndAttributes>::value_type &entry =
+ _undefines.GetOrCreateValue(targetclassName);
+
+ if (entry.getValue().name)
+ 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
-void LTOModule::addObjCClassRef(GlobalVariable* clgv)
-{
- std::string targetclassName;
- if ( objcClassNameFromExpression(clgv->getInitializer(), targetclassName) ){
- NameAndAttributes info;
- if ( _undefines.find(targetclassName.c_str()) == _undefines.end() ) {
- const char* symbolName = ::strdup(targetclassName.c_str());
- info.name = ::strdup(symbolName);
- info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
- // string is owned by _undefines
- _undefines[info.name] = info;
- }
- }
+/// addObjCClassRef - Parse i386/ppc ObjC class list data structure.
+void LTOModule::addObjCClassRef(GlobalVariable *clgv) {
+ std::string targetclassName;
+ if (!objcClassNameFromExpression(clgv->getInitializer(), targetclassName))
+ return;
+
+ NameAndAttributes info;
+ StringMap<NameAndAttributes>::value_type &entry =
+ _undefines.GetOrCreateValue(targetclassName);
+ if (entry.getValue().name)
+ 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);
}
+/// 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
+ // ObjC class data structure is allocated statically in the executable
+ // that defines that class. That data structures contains a pointer to
+ // its superclass. But instead of just initializing that part of the
+ // struct to the address of its superclass, and letting the static and
+ // dynamic linkers do the rest, the runtime works by having that field
+ // instead point to a C-string that is the name of the superclass.
+ // At runtime the objc initialization updates that pointer and sets
+ // it to point to the actual super class. As far as the linker
+ // knows it is just a pointer to a string. But then someone wanted the
+ // linker to issue errors at build time if the superclass was not found.
+ // So they figured out a way in mach-o object format to use an absolute
+ // symbols (.objc_class_name_Foo = 0) and a floating reference
+ // (.reference .objc_class_name_Bar) to cause the linker into erroring when
+ // a class was missing.
+ // The following synthesizes the implicit .objc_* symbols for the linker
+ // from the ObjC data structures generated by the front end.
+
+ // 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);
+ }
+ }
-void LTOModule::addDefinedDataSymbol(GlobalValue* v, Mangler& mangler)
-{
- // add to list of defined symbols
- addDefinedSymbol(v, mangler, false);
-
- // 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
- // ObjC class data structure is allocated statically in the executable
- // that defines that class. That data structures contains a pointer to
- // its superclass. But instead of just initializing that part of the
- // struct to the address of its superclass, and letting the static and
- // dynamic linkers do the rest, the runtime works by having that field
- // instead point to a C-string that is the name of the superclass.
- // At runtime the objc initialization updates that pointer and sets
- // it to point to the actual super class. As far as the linker
- // knows it is just a pointer to a string. But then someone wanted the
- // linker to issue errors at build time if the superclass was not found.
- // So they figured out a way in mach-o object format to use an absolute
- // symbols (.objc_class_name_Foo = 0) and a floating reference
- // (.reference .objc_class_name_Bar) to cause the linker into erroring when
- // 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 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 an ObjC category definition
+ else if (v->getSection().compare(0, 18, "__OBJC,__category,") == 0) {
+ if (GlobalVariable *gv = dyn_cast<GlobalVariable>(v)) {
+ addObjCCategory(gv);
}
+ }
- // add external symbols referenced by this data.
- for (unsigned count = 0, total = v->getNumOperands();
- count != total; ++count) {
- findExternalRefs(v->getOperand(count), mangler);
+ // 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);
+}
-void LTOModule::addDefinedSymbol(GlobalValue* def, Mangler &mangler,
- bool isFunction)
-{
- // ignore all llvm.* symbols
- if (def->getName().startswith("llvm."))
- return;
-
- // string is owned by _defines
- const char* symbolName = ::strdup(mangler.getMangledName(def).c_str());
-
- // set alignment part log2() can have rounding errors
- uint32_t align = def->getAlignment();
- uint32_t attr = align ? CountTrailingZeros_32(def->getAlignment()) : 0;
-
- // set permissions part
- if ( isFunction )
- attr |= LTO_SYMBOL_PERMISSIONS_CODE;
- else {
- GlobalVariable* gv = dyn_cast<GlobalVariable>(def);
- if ( (gv != NULL) && gv->isConstant() )
- attr |= LTO_SYMBOL_PERMISSIONS_RODATA;
- else
- attr |= LTO_SYMBOL_PERMISSIONS_DATA;
- }
-
- // set definition part
- if ( def->hasWeakLinkage() || def->hasLinkOnceLinkage() ) {
- attr |= LTO_SYMBOL_DEFINITION_WEAK;
- }
- else if ( def->hasCommonLinkage()) {
- attr |= LTO_SYMBOL_DEFINITION_TENTATIVE;
- }
- else {
- attr |= LTO_SYMBOL_DEFINITION_REGULAR;
- }
-
- // set scope part
- if ( def->hasHiddenVisibility() )
- attr |= LTO_SYMBOL_SCOPE_HIDDEN;
- else if ( def->hasProtectedVisibility() )
- attr |= LTO_SYMBOL_SCOPE_PROTECTED;
- else if ( def->hasExternalLinkage() || def->hasWeakLinkage()
- || def->hasLinkOnceLinkage() || def->hasCommonLinkage() )
- attr |= LTO_SYMBOL_SCOPE_DEFAULT;
+/// addDefinedSymbol - Add a defined symbol to the list.
+void LTOModule::addDefinedSymbol(GlobalValue *def, bool isFunction) {
+ // ignore all llvm.* symbols
+ if (def->getName().startswith("llvm."))
+ return;
+
+ // string is owned by _defines
+ SmallString<64> Buffer;
+ _mangler.getNameWithPrefix(Buffer, def, false);
+
+ // set alignment part log2() can have rounding errors
+ uint32_t align = def->getAlignment();
+ uint32_t attr = align ? CountTrailingZeros_32(def->getAlignment()) : 0;
+
+ // set permissions part
+ if (isFunction) {
+ attr |= LTO_SYMBOL_PERMISSIONS_CODE;
+ } else {
+ GlobalVariable *gv = dyn_cast<GlobalVariable>(def);
+ if (gv && gv->isConstant())
+ attr |= LTO_SYMBOL_PERMISSIONS_RODATA;
else
- attr |= LTO_SYMBOL_SCOPE_INTERNAL;
+ attr |= LTO_SYMBOL_PERMISSIONS_DATA;
+ }
+
+ // set definition part
+ if (def->hasWeakLinkage() || def->hasLinkOnceLinkage() ||
+ def->hasLinkerPrivateWeakLinkage())
+ attr |= LTO_SYMBOL_DEFINITION_WEAK;
+ else if (def->hasCommonLinkage())
+ attr |= LTO_SYMBOL_DEFINITION_TENTATIVE;
+ else
+ attr |= LTO_SYMBOL_DEFINITION_REGULAR;
+
+ // set scope part
+ if (def->hasHiddenVisibility())
+ attr |= LTO_SYMBOL_SCOPE_HIDDEN;
+ else if (def->hasProtectedVisibility())
+ attr |= LTO_SYMBOL_SCOPE_PROTECTED;
+ else if (def->hasExternalLinkage() || def->hasWeakLinkage() ||
+ def->hasLinkOnceLinkage() || def->hasCommonLinkage() ||
+ def->hasLinkerPrivateWeakLinkage())
+ attr |= LTO_SYMBOL_SCOPE_DEFAULT;
+ else if (def->hasLinkOnceODRAutoHideLinkage())
+ attr |= LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN;
+ else
+ attr |= LTO_SYMBOL_SCOPE_INTERNAL;
+
+ 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 = 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);
+
+ // only add new define if not already defined
+ if (entry.getValue())
+ return;
+
+ entry.setValue(1);
+
+ 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
- NameAndAttributes info;
- info.name = symbolName;
- info.attributes = (lto_symbol_attributes)attr;
_symbols.push_back(info);
- _defines[info.name] = 1;
+ return;
+ }
+
+ if (info.isFunction)
+ addDefinedFunctionSymbol(cast<Function>(info.symbol));
+ else
+ addDefinedDataSymbol(info.symbol);
+
+ _symbols.back().attributes &= ~LTO_SYMBOL_SCOPE_MASK;
+ _symbols.back().attributes |= scope;
}
-void LTOModule::addAsmGlobalSymbol(const char *name) {
- // only add new define if not already defined
- if ( _defines.count(name) == 0 )
- return;
-
- // string is owned by _defines
- const char *symbolName = ::strdup(name);
- uint32_t attr = LTO_SYMBOL_DEFINITION_REGULAR;
- attr |= LTO_SYMBOL_SCOPE_DEFAULT;
- NameAndAttributes info;
- info.name = symbolName;
- info.attributes = (lto_symbol_attributes)attr;
- _symbols.push_back(info);
- _defines[info.name] = 1;
+/// 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);
+
+ _asm_undefines.push_back(entry.getKey().data());
+
+ // we already have the symbol
+ if (entry.getValue().name)
+ return;
+
+ uint32_t attr = LTO_SYMBOL_DEFINITION_UNDEFINED;;
+ attr |= LTO_SYMBOL_SCOPE_DEFAULT;
+ NameAndAttributes info;
+ info.name = entry.getKey().data();
+ info.attributes = attr;
+ info.isFunction = false;
+ info.symbol = 0;
+
+ entry.setValue(info);
}
-void LTOModule::addPotentialUndefinedSymbol(GlobalValue* decl, Mangler &mangler)
-{
- // ignore all llvm.* symbols
- if (decl->getName().startswith("llvm."))
- return;
+/// 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;
- // ignore all aliases
- if (isa<GlobalAlias>(decl))
- return;
+ // ignore all aliases
+ if (isa<GlobalAlias>(decl))
+ return;
- const char* name = mangler.getMangledName(decl).c_str();
+ SmallString<64> name;
+ _mangler.getNameWithPrefix(name, decl, false);
- // we already have the symbol
- if (_undefines.find(name) != _undefines.end())
- return;
+ StringMap<NameAndAttributes>::value_type &entry =
+ _undefines.GetOrCreateValue(name);
- NameAndAttributes info;
- // string is owned by _undefines
- info.name = ::strdup(name);
- if (decl->hasExternalWeakLinkage())
- info.attributes = LTO_SYMBOL_DEFINITION_WEAKUNDEF;
- else
- info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
- _undefines[name] = info;
+ // we already have the symbol
+ if (entry.getValue().name)
+ 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 };
+
+ private:
+ StringMap<State> Symbols;
+
+ void markDefined(const MCSymbol &Symbol) {
+ State &S = Symbols[Symbol.getName()];
+ switch (S) {
+ case DefinedGlobal:
+ case Global:
+ S = DefinedGlobal;
+ break;
+ case NeverSeen:
+ case Defined:
+ case Used:
+ S = Defined;
+ break;
+ }
+ }
+ void markGlobal(const MCSymbol &Symbol) {
+ State &S = Symbols[Symbol.getName()];
+ switch (S) {
+ case DefinedGlobal:
+ case Defined:
+ S = DefinedGlobal;
+ break;
+
+ case NeverSeen:
+ case Global:
+ case Used:
+ S = Global;
+ break;
+ }
+ }
+ void markUsed(const MCSymbol &Symbol) {
+ State &S = Symbols[Symbol.getName()];
+ switch (S) {
+ case DefinedGlobal:
+ case Defined:
+ case Global:
+ break;
+
+ case NeverSeen:
+ case Used:
+ S = Used;
+ break;
+ }
+ }
+ // FIXME: mostly copied for the obj streamer.
+ void AddValueSymbols(const MCExpr *Value) {
+ switch (Value->getKind()) {
+ case MCExpr::Target:
+ // FIXME: What should we do in here?
+ break;
+
+ case MCExpr::Constant:
+ break;
+
+ case MCExpr::Binary: {
+ const MCBinaryExpr *BE = cast<MCBinaryExpr>(Value);
+ AddValueSymbols(BE->getLHS());
+ AddValueSymbols(BE->getRHS());
+ break;
+ }
+
+ case MCExpr::SymbolRef:
+ markUsed(cast<MCSymbolRefExpr>(Value)->getSymbol());
+ break;
+
+ case MCExpr::Unary:
+ AddValueSymbols(cast<MCUnaryExpr>(Value)->getSubExpr());
+ break;
+ }
+ }
-// Find external symbols referenced by VALUE. This is a recursive function.
-void LTOModule::findExternalRefs(Value* value, Mangler &mangler) {
+ public:
+ typedef StringMap<State>::const_iterator const_iterator;
- if (GlobalValue* gv = dyn_cast<GlobalValue>(value)) {
- if ( !gv->hasExternalLinkage() )
- addPotentialUndefinedSymbol(gv, mangler);
- // If this is a variable definition, do not recursively process
- // initializer. It might contain a reference to this variable
- // and cause an infinite loop. The initializer will be
- // processed in addDefinedDataSymbol().
- return;
+ const_iterator begin() {
+ return Symbols.begin();
}
-
- // GlobalValue, even with InternalLinkage type, may have operands with
- // ExternalLinkage type. Do not ignore these operands.
- if (Constant* c = dyn_cast<Constant>(value)) {
- // Handle ConstantExpr, ConstantStruct, ConstantArry etc..
- for (unsigned i = 0, e = c->getNumOperands(); i != e; ++i)
- findExternalRefs(c->getOperand(i), mangler);
+
+ const_iterator end() {
+ return Symbols.end();
}
-}
-void LTOModule::lazyParseSymbols()
-{
- if ( !_symbolsParsed ) {
- _symbolsParsed = true;
-
- // Use mangler to add GlobalPrefix to names to match linker names.
- Mangler mangler(*_module, _target->getTargetAsmInfo()->getGlobalPrefix());
- // add chars used in ObjC method names so method names aren't mangled
- mangler.markCharAcceptable('[');
- mangler.markCharAcceptable(']');
- mangler.markCharAcceptable('(');
- mangler.markCharAcceptable(')');
- mangler.markCharAcceptable('-');
- mangler.markCharAcceptable('+');
- mangler.markCharAcceptable(' ');
-
- // add functions
- for (Module::iterator f = _module->begin(); f != _module->end(); ++f) {
- if ( f->isDeclaration() )
- addPotentialUndefinedSymbol(f, mangler);
- else
- addDefinedFunctionSymbol(f, mangler);
- }
-
- // add data
- for (Module::global_iterator v = _module->global_begin(),
- e = _module->global_end(); v != e; ++v) {
- if ( v->isDeclaration() )
- addPotentialUndefinedSymbol(v, mangler);
- else
- addDefinedDataSymbol(v, mangler);
- }
+ RecordStreamer(MCContext &Context) : MCStreamer(Context) {}
- // add asm globals
- const std::string &inlineAsm = _module->getModuleInlineAsm();
- const std::string glbl = ".globl";
- std::string asmSymbolName;
- std::string::size_type pos = inlineAsm.find(glbl, 0);
- while (pos != std::string::npos) {
- // eat .globl
- pos = pos + 6;
-
- // skip white space between .globl and symbol name
- std::string::size_type pbegin = inlineAsm.find_first_not_of(' ', pos);
- if (pbegin == std::string::npos)
- break;
-
- // find end-of-line
- std::string::size_type pend = inlineAsm.find_first_of('\n', pbegin);
- if (pend == std::string::npos)
- break;
-
- asmSymbolName.assign(inlineAsm, pbegin, pend - pbegin);
- addAsmGlobalSymbol(asmSymbolName.c_str());
-
- // search next .globl
- pos = inlineAsm.find(glbl, pend);
- }
+ 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 EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
+ // FIXME: should we handle aliases?
+ markDefined(*Symbol);
+ }
+ virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) {
+ if (Attribute == MCSA_Global)
+ markGlobal(*Symbol);
+ }
+ virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
+ uint64_t Size , unsigned ByteAlignment) {
+ markDefined(*Symbol);
+ }
+ virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment) {
+ markDefined(*Symbol);
+ }
- // 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);
- }
- }
- }
+ // 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) {}
+ 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 EmitULEB128Value(const MCExpr *Value) {}
+ virtual void EmitSLEB128Value(const MCExpr *Value) {}
+ virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
+ unsigned ValueSize,
+ unsigned MaxBytesToEmit) {}
+ virtual void EmitCodeAlignment(unsigned ByteAlignment,
+ unsigned MaxBytesToEmit) {}
+ 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() {}
+ };
+} // 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())
+ return false;
+
+ OwningPtr<RecordStreamer> Streamer(new RecordStreamer(_context));
+ MemoryBuffer *Buffer = MemoryBuffer::getMemBuffer(inlineAsm);
+ SourceMgr SrcMgr;
+ SrcMgr.AddNewSourceBuffer(Buffer, SMLoc());
+ OwningPtr<MCAsmParser> Parser(createMCAsmParser(SrcMgr,
+ _context, *Streamer,
+ *_target->getMCAsmInfo()));
+ 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(T.getName()) +
+ " does not define AsmParser.";
+ return true;
+ }
+
+ Parser->setTargetParser(*TAP);
+ if (Parser->Run(false))
+ return true;
+
+ for (RecordStreamer::const_iterator i = Streamer->begin(),
+ e = Streamer->end(); i != e; ++i) {
+ StringRef Key = i->first();
+ RecordStreamer::State Value = i->second;
+ if (Value == RecordStreamer::DefinedGlobal)
+ addAsmGlobalSymbol(Key.data(), LTO_SYMBOL_SCOPE_DEFAULT);
+ else if (Value == RecordStreamer::Defined)
+ addAsmGlobalSymbol(Key.data(), LTO_SYMBOL_SCOPE_INTERNAL);
+ else if (Value == RecordStreamer::Global ||
+ 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;
-uint32_t LTOModule::getSymbolCount()
-{
- lazyParseSymbols();
- return _symbols.size();
+ return V.isDeclaration();
}
+/// 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(), e = _module->end(); f != e; ++f) {
+ if (isDeclaration(*f))
+ addPotentialUndefinedSymbol(f, true);
+ else
+ addDefinedFunctionSymbol(f);
+ }
-lto_symbol_attributes LTOModule::getSymbolAttributes(uint32_t index)
-{
- lazyParseSymbols();
- if ( index < _symbols.size() )
- return _symbols[index].attributes;
+ // add data
+ for (Module::global_iterator v = _module->global_begin(),
+ e = _module->global_end(); v != e; ++v) {
+ if (isDeclaration(*v))
+ addPotentialUndefinedSymbol(v, false);
else
- return lto_symbol_attributes(0);
-}
+ addDefinedDataSymbol(v);
+ }
+
+ // add asm globals
+ if (addAsmGlobalSymbols(errMsg))
+ return true;
-const char* LTOModule::getSymbolName(uint32_t index)
-{
- lazyParseSymbols();
- if ( index < _symbols.size() )
- return _symbols[index].name;
+ // add aliases
+ 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
- return NULL;
+ addDefinedDataSymbol(a);
+ }
+
+ // make symbols for all undefines
+ 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;
}
projects / oota-llvm.git / blobdiff