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Add LTO_SYMBOL_DEFINITION_WEAKUNDEF, use that on the gold plugin.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69972 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2009-04-24 16:55:21 +00:00
parent 16ffa807fc
commit 7431af050f
4 changed files with 23 additions and 9 deletions
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1
include/llvm-c/lto.h
View File

@ -30,6 +30,7 @@ typedef enum {
LTO_SYMBOL_DEFINITION_TENTATIVE = 0x00000200,
LTO_SYMBOL_DEFINITION_WEAK = 0x00000300,
LTO_SYMBOL_DEFINITION_UNDEFINED = 0x00000400,
LTO_SYMBOL_DEFINITION_WEAKUNDEF = 0x00000500,
LTO_SYMBOL_SCOPE_MASK = 0x00003800,
LTO_SYMBOL_SCOPE_INTERNAL = 0x00000800,
LTO_SYMBOL_SCOPE_HIDDEN = 0x00001000,

3
tools/gold/gold-plugin.cpp
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@ -257,6 +257,9 @@ ld_plugin_status claim_file_hook(const ld_plugin_input_file *file,
case LTO_SYMBOL_DEFINITION_WEAK:
sym.def = LDPK_WEAKDEF;
break;
case LTO_SYMBOL_DEFINITION_WEAKUNDEF:
sym.def = LDPK_WEAKUNDEF;
break;
default:
(*message)(LDPL_ERROR, "Unknown definition attribute: %d", definition);
return LDPS_ERR;

26
tools/lto/LTOModule.cpp
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@ -258,9 +258,21 @@ void LTOModule::addPotentialUndefinedSymbol(GlobalValue* decl, Mangler &mangler)
{
const char* name = mangler.getValueName(decl).c_str();
// ignore all llvm.* symbols
if ( strncmp(name, "llvm.", 5) != 0 ) {
_undefines[name] = 1;
}
if ( strncmp(name, "llvm.", 5) == 0 )
return;
// we already have the symbol
if (_undefines.find(name) != _undefines.end())
return;
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;
}
@ -339,16 +351,14 @@ void LTOModule::lazyParseSymbols()
}
// make symbols for all undefines
for (StringSet::iterator it=_undefines.begin();
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->getKeyData(), it->getKeyData()+
it->getKeyLength()) == 0 ) {
NameAndAttributes info;
info.name = it->getKeyData();
info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
_symbols.push_back(info);
NameAndAttributes info = it->getValue();
_symbols.push_back(info);
}
}
}

2
tools/lto/LTOModule.h
View File

@ -97,7 +97,7 @@ private:
std::vector<NameAndAttributes> _symbols;
// _defines and _undefines only needed to disambiguate tentative definitions
StringSet _defines;
StringSet _undefines;
llvm::StringMap<NameAndAttributes> _undefines;
};
extern std::string getFeatureString(const char *TargetTriple);