//===----------------------------------------------------------------------===//
#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/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/MC/MCParser/MCAsmParser.h"
#include "llvm/Target/TargetRegisterInfo.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/ADT/OwningPtr.h"
+#include "llvm/ADT/Triple.h"
using namespace llvm;
+LTOModule::LTOModule(llvm::Module *m, llvm::TargetMachine *t)
+ : _module(m), _target(t),
+ _context(*_target->getMCAsmInfo(), *_target->getRegisterInfo(), NULL),
+ _mangler(_context, *_target->getTargetData()) {}
+
+/// 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 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));
TargetMachine *target = march->createTargetMachine(Triple, 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 = (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);
if (GlobalVariable *gvn = dyn_cast<GlobalVariable>(op)) {
Constant *cn = gvn->getInitializer();
- if (ConstantArray *ca = dyn_cast<ConstantArray>(cn)) {
+ if (ConstantDataArray *ca = dyn_cast<ConstantDataArray>(cn)) {
if (ca->isCString()) {
- name = ".objc_class_name_" + ca->getAsCString();
+ name = ".objc_class_name_" + ca->getAsCString().str();
return true;
}
}
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);
}
}
+/// 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;
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) {
+ // If we haven't seen this symbol before, save it and we may see it again.
+ StringMap<NameAndAttributes>::value_type
+ &asm_entry = _asm_defines.GetOrCreateValue(name);
+ NameAndAttributes &asm_info = _asm_defines[asm_entry.getKey().data()];
+ asm_info.name = name;
+ asm_info.attributes = scope;
+ asm_info.isFunction = false;
+ asm_info.symbol = 0;
+ 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;
if (entry.getValue().name)
return;
+ StringMap<NameAndAttributes>::value_type &asm_entry =
+ _asm_defines.GetOrCreateValue(name);
+
+ if (asm_entry.getValue().name != 0) {
+ if (isFunc)
+ addDefinedFunctionSymbol(cast<Function>(decl));
+ else
+ addDefinedDataSymbol(decl);
+
+ _symbols.back().attributes &= ~LTO_SYMBOL_SCOPE_MASK;
+ _symbols.back().attributes |= asm_entry.getValue().attributes;
+ 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);
}
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,
if (Inst.getOperand(i).isExpr())
AddValueSymbols(Inst.getOperand(i).getExpr());
}
- virtual void Finish() {}
+ 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;
}
+/// isDeclaration - Return 'true' if the global value is a declaration.
static bool isDeclaration(const GlobalValue &V) {
if (V.hasAvailableExternallyLinkage())
return true;
return V.isDeclaration();
}
-static bool isAliasToDeclaration(const GlobalAlias &V) {
- return isDeclaration(*V.getAliasedGlobal());
-}
-
-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;
}
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