-//===-LTOModule.cpp - LLVM Link Time Optimizer ----------------------------===//
+//===-- LTOModule.cpp - LLVM Link Time Optimizer --------------------------===//
//
// The LLVM Compiler Infrastructure
//
#include "llvm/Constants.h"
#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
-#include "llvm/ModuleProvider.h"
#include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/Triple.h"
#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/Support/SystemUtils.h"
-#include "llvm/Support/Mangler.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/MathExtras.h"
+#include "llvm/System/Host.h"
#include "llvm/System/Path.h"
#include "llvm/System/Process.h"
+#include "llvm/Target/Mangler.h"
#include "llvm/Target/SubtargetFeature.h"
-#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetRegistry.h"
-
-#include <fstream>
+#include "llvm/Target/TargetSelect.h"
using namespace llvm;
bool LTOModule::isBitcodeFile(const void* mem, size_t length)
{
- return ( llvm::sys::IdentifyFileType((char*)mem, length)
- == llvm::sys::Bitcode_FileType );
+ return llvm::sys::IdentifyFileType((char*)mem, length)
+ == llvm::sys::Bitcode_FileType;
}
bool LTOModule::isBitcodeFile(const char* path)
const char* triplePrefix)
{
MemoryBuffer* buffer = makeBuffer(mem, length);
- if ( buffer == NULL )
+ if (!buffer)
return false;
return isTargetMatch(buffer, 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 ) {
+ OwningPtr<Module> m(getLazyBitcodeModule(buffer, getGlobalContext()));
+ // on success, m owns buffer and both are deleted at end of this method
+ if (!m) {
delete buffer;
return false;
}
- std::string actualTarget = mp->getModule()->getTargetTriple();
- return ( strncmp(actualTarget.c_str(), triplePrefix,
+ std::string actualTarget = m->getTargetTriple();
+ return (strncmp(actualTarget.c_str(), triplePrefix,
strlen(triplePrefix)) == 0);
}
std::string& errMsg)
{
OwningPtr<MemoryBuffer> buffer(MemoryBuffer::getFile(path, &errMsg));
- if ( !buffer )
+ if (!buffer)
return NULL;
return makeLTOModule(buffer.get(), errMsg);
}
/// 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);
+ const char *startPtr = (char*)mem;
+ const char *endPtr = startPtr+length;
+ if (((uintptr_t)endPtr & (sys::Process::GetPageSize()-1)) == 0 ||
+ *endPtr != 0)
+ return MemoryBuffer::getMemBufferCopy(StringRef(startPtr, length));
+
+ return MemoryBuffer::getMemBuffer(StringRef(startPtr, length));
}
std::string& errMsg)
{
OwningPtr<MemoryBuffer> buffer(makeBuffer(mem, length));
- if ( !buffer )
+ if (!buffer)
return NULL;
return makeLTOModule(buffer.get(), 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) {
- SubtargetFeatures Features;
-
- 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);
- }
-
- return Features.getString();
-}
-
LTOModule* LTOModule::makeLTOModule(MemoryBuffer* buffer,
std::string& errMsg)
{
+ InitializeAllTargets();
+
// parse bitcode buffer
OwningPtr<Module> m(ParseBitcodeFile(buffer, getGlobalContext(), &errMsg));
- if ( !m )
+ if (!m)
return NULL;
- // find machine architecture for this module
- const Target* march =
- TargetRegistry::getClosestStaticTargetForModule(*m, errMsg);
- if ( march == NULL )
+ std::string Triple = m->getTargetTriple();
+ if (Triple.empty())
+ Triple = sys::getHostTriple();
+
+ // find machine architecture for this module
+ const Target* march = TargetRegistry::lookupTarget(Triple, errMsg);
+ if (!march)
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);
+ const std::string FeatureStr =
+ SubtargetFeatures::getDefaultSubtargetFeatures(llvm::Triple(Triple));
+ TargetMachine* target = march->createTargetMachine(Triple, FeatureStr);
return new LTOModule(m.take(), target);
}
if (GlobalVariable* gvn = dyn_cast<GlobalVariable>(op)) {
Constant* cn = gvn->getInitializer();
if (ConstantArray* ca = dyn_cast<ConstantArray>(cn)) {
- if ( ca->isCString() ) {
+ if (ca->isCString()) {
name = ".objc_class_name_" + ca->getAsString();
return true;
}
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) ) {
+ if (objcClassNameFromExpression(c->getOperand(1), superclassName)) {
NameAndAttributes info;
- if ( _undefines.find(superclassName.c_str()) == _undefines.end() ) {
+ 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;
}
// third slot in __OBJC,__class is pointer to class name
std::string className;
- if ( objcClassNameFromExpression(c->getOperand(2), className) ) {
+ if (objcClassNameFromExpression(c->getOperand(2), className)) {
const char* symbolName = ::strdup(className.c_str());
NameAndAttributes info;
info.name = symbolName;
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) ) {
+ if (objcClassNameFromExpression(c->getOperand(1), targetclassName)) {
NameAndAttributes info;
- if ( _undefines.find(targetclassName.c_str()) == _undefines.end() ){
+ 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;
void LTOModule::addObjCClassRef(GlobalVariable* clgv)
{
std::string targetclassName;
- if ( objcClassNameFromExpression(clgv->getInitializer(), targetclassName) ){
+ if (objcClassNameFromExpression(clgv->getInitializer(), targetclassName)) {
NameAndAttributes info;
- if ( _undefines.find(targetclassName.c_str()) == _undefines.end() ) {
+ 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;
// 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 */ ) {
+ 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 (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 ) {
+ 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 ) {
+ else if (v->getSection().compare(0, 18, "__OBJC,__cls_refs,") == 0) {
if (GlobalVariable* gv = dyn_cast<GlobalVariable>(v)) {
addObjCClassRef(gv);
}
bool isFunction)
{
// ignore all llvm.* symbols
- if ( strncmp(def->getNameStart(), "llvm.", 5) == 0 )
+ if (def->getName().startswith("llvm."))
return;
// string is owned by _defines
- const char* symbolName = ::strdup(mangler.getMangledName(def).c_str());
+ const char* symbolName = ::strdup(mangler.getNameWithPrefix(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 )
+ if (isFunction)
attr |= LTO_SYMBOL_PERMISSIONS_CODE;
else {
GlobalVariable* gv = dyn_cast<GlobalVariable>(def);
- if ( (gv != NULL) && gv->isConstant() )
+ if (gv && gv->isConstant())
attr |= LTO_SYMBOL_PERMISSIONS_RODATA;
else
attr |= LTO_SYMBOL_PERMISSIONS_DATA;
}
// set definition part
- if ( def->hasWeakLinkage() || def->hasLinkOnceLinkage() ) {
+ if (def->hasWeakLinkage() || def->hasLinkOnceLinkage()) {
attr |= LTO_SYMBOL_DEFINITION_WEAK;
}
- else if ( def->hasCommonLinkage()) {
+ else if (def->hasCommonLinkage()) {
attr |= LTO_SYMBOL_DEFINITION_TENTATIVE;
}
else {
}
// set scope part
- if ( def->hasHiddenVisibility() )
+ if (def->hasHiddenVisibility())
attr |= LTO_SYMBOL_SCOPE_HIDDEN;
- else if ( def->hasProtectedVisibility() )
+ else if (def->hasProtectedVisibility())
attr |= LTO_SYMBOL_SCOPE_PROTECTED;
- else if ( def->hasExternalLinkage() || def->hasWeakLinkage()
- || def->hasLinkOnceLinkage() || def->hasCommonLinkage() )
+ else if (def->hasExternalLinkage() || def->hasWeakLinkage()
+ || def->hasLinkOnceLinkage() || def->hasCommonLinkage())
attr |= LTO_SYMBOL_SCOPE_DEFAULT;
else
attr |= LTO_SYMBOL_SCOPE_INTERNAL;
void LTOModule::addAsmGlobalSymbol(const char *name) {
// only add new define if not already defined
- if ( _defines.count(name, &name[strlen(name)+1]) == 0 )
+ if (_defines.count(name) == 0)
return;
// string is owned by _defines
void LTOModule::addPotentialUndefinedSymbol(GlobalValue* decl, Mangler &mangler)
{
// ignore all llvm.* symbols
- if ( strncmp(decl->getNameStart(), "llvm.", 5) == 0 )
+ if (decl->getName().startswith("llvm."))
return;
// ignore all aliases
if (isa<GlobalAlias>(decl))
return;
- const char* name = mangler.getMangledName(decl).c_str();
+ std::string name = mangler.getNameWithPrefix(decl);
// we already have the symbol
if (_undefines.find(name) != _undefines.end())
NameAndAttributes info;
// string is owned by _undefines
- info.name = ::strdup(name);
+ info.name = ::strdup(name.c_str());
if (decl->hasExternalWeakLinkage())
info.attributes = LTO_SYMBOL_DEFINITION_WEAKUNDEF;
else
-// Find exeternal symbols referenced by VALUE. This is a recursive function.
+// Find external symbols referenced by VALUE. This is a recursive function.
void LTOModule::findExternalRefs(Value* value, Mangler &mangler) {
if (GlobalValue* gv = dyn_cast<GlobalValue>(value)) {
- if ( !gv->hasExternalLinkage() )
+ 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
// processed in addDefinedDataSymbol().
return;
}
-
+
// 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..
+ // Handle ConstantExpr, ConstantStruct, ConstantArry etc.
for (unsigned i = 0, e = c->getNumOperands(); i != e; ++i)
findExternalRefs(c->getOperand(i), mangler);
}
void LTOModule::lazyParseSymbols()
{
- if ( !_symbolsParsed ) {
+ 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(' ');
+ MCContext Context(*_target->getMCAsmInfo());
+ Mangler mangler(Context, *_target->getTargetData());
// add functions
for (Module::iterator f = _module->begin(); f != _module->end(); ++f) {
- if ( f->isDeclaration() )
+ 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() )
+ if (v->isDeclaration())
addPotentialUndefinedSymbol(v, mangler);
else
addDefinedDataSymbol(v, mangler);
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->getKeyData(), it->getKeyData()+
- it->getKeyLength()) == 0 ) {
+ if (_defines.count(it->getKey()) == 0) {
NameAndAttributes info = it->getValue();
_symbols.push_back(info);
}
lto_symbol_attributes LTOModule::getSymbolAttributes(uint32_t index)
{
lazyParseSymbols();
- if ( index < _symbols.size() )
+ if (index < _symbols.size())
return _symbols[index].attributes;
else
return lto_symbol_attributes(0);
const char* LTOModule::getSymbolName(uint32_t index)
{
lazyParseSymbols();
- if ( index < _symbols.size() )
+ if (index < _symbols.size())
return _symbols[index].name;
else
return NULL;
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