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[ELF] Merge canInline into scriptDefined

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They perform similar tasks and are essentially the same after
d28c26bbdd9e6e55cc0a6156e9879f7e0ca36329.
This commit is contained in:
Fangrui Song 2022-02-05 12:00:34 -08:00
parent eb9ac2cc14
commit 7c675923c7
4 changed files with 12 additions and 16 deletions
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4
lld/ELF/Driver.cpp
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@ -2061,8 +2061,8 @@ static std::vector<WrappedSymbol> addWrappedSymbols(opt::InputArgList &args) {
// We want to tell LTO not to inline symbols to be overwritten
// because LTO doesn't know the final symbol contents after renaming.
real->canInline = false;
sym->canInline = false;
real->scriptDefined = true;
sym->scriptDefined = true;
// Tell LTO not to eliminate these symbols.
sym->isUsedInRegularObj = true;

2
lld/ELF/LTO.cpp
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@ -273,7 +273,7 @@ void BitcodeCompiler::add(BitcodeFile &f) {
// We tell LTO to not apply interprocedural optimization for wrapped
// (with --wrap) symbols because otherwise LTO would inline them while
// their values are still not final.
r.LinkerRedefined = !sym->canInline;
r.LinkerRedefined = sym->scriptDefined;
}
checkError(ltoObj->add(std::move(f.obj), resols));
}

1
lld/ELF/SymbolTable.cpp
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@ -89,7 +89,6 @@ Symbol *SymbolTable::insert(StringRef name) {
sym->isUsedInRegularObj = false;
sym->exportDynamic = false;
sym->inDynamicList = false;
sym->canInline = true;
sym->referenced = false;
sym->traced = false;
sym->scriptDefined = false;

21
lld/ELF/Symbols.h
View File

@ -126,11 +126,6 @@ public:
// exported into .dynsym.
uint8_t inDynamicList : 1;
// False if LTO shouldn't inline whatever this symbol points to. If a symbol
// is overwritten after LTO, LTO shouldn't inline the symbol because it
// doesn't know the final contents of the symbol.
uint8_t canInline : 1;
// Used to track if there has been at least one undefined reference to the
// symbol. For Undefined and SharedSymbol, the binding may change to STB_WEAK
// if the first undefined reference from a non-shared object is weak.
@ -246,11 +241,11 @@ protected:
binding(binding), type(type), stOther(stOther), symbolKind(k),
visibility(stOther & 3),
isUsedInRegularObj(!file || file->kind() == InputFile::ObjKind),
exportDynamic(false), inDynamicList(false), canInline(false),
referenced(false), traced(false), hasVersionSuffix(false),
isInIplt(false), gotInIgot(false), isPreemptible(false), used(false),
folded(false), needsTocRestore(false), scriptDefined(false),
needsCopy(false), needsGot(false), needsPlt(false), needsTlsDesc(false),
exportDynamic(false), inDynamicList(false), referenced(false),
traced(false), hasVersionSuffix(false), isInIplt(false),
gotInIgot(false), isPreemptible(false), used(false), folded(false),
needsTocRestore(false), scriptDefined(false), needsCopy(false),
needsGot(false), needsPlt(false), needsTlsDesc(false),
needsTlsGd(false), needsTlsGdToIe(false), needsTlsLd(false),
needsGotDtprel(false), needsTlsIe(false), hasDirectReloc(false) {}
@ -279,7 +274,10 @@ public:
// PPC64 toc pointer.
uint8_t needsTocRestore : 1;
// True if this symbol is defined by a linker script.
// True if this symbol is defined by a symbol assignment or wrapped by --wrap.
//
// LTO shouldn't inline the symbol because it doesn't know the final content
// of the symbol.
uint8_t scriptDefined : 1;
// True if this symbol needs a canonical PLT entry, or (during
@ -588,7 +586,6 @@ void Symbol::replace(const Symbol &newSym) {
isUsedInRegularObj = old.isUsedInRegularObj;
exportDynamic = old.exportDynamic;
inDynamicList = old.inDynamicList;
canInline = old.canInline;
referenced = old.referenced;
traced = old.traced;
hasVersionSuffix = old.hasVersionSuffix;