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[WebAssembly] Add comment as follow-up to rL362276. NFC. 

Subscribers: dschuff, jgravelle-google, aheejin, sunfish, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D62824

llvm-svn: 362522
This commit is contained in:
Sam Clegg 2019-06-04 16:35:23 +00:00
parent 48566aaab4
commit 8e8ddaa38f
1 changed files with 3 additions and 1 deletions
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4
lld/wasm/SymbolTable.cpp
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@ -199,10 +199,12 @@ DefinedFunction *SymbolTable::addSyntheticFunction(StringRef Name,
Flags, nullptr, Function);
}
// Adds an optional, linker generated, data symbols. The symbol will only be
// added if there is an undefine reference to it, or if it is explictly exported
// via the --export flag. Otherwise we don't add the symbol and return nullptr.
DefinedData *SymbolTable::addOptionalDataSymbol(StringRef Name, uint32_t Value,
uint32_t Flags) {
Symbol *S = find(Name);
// Enable --export of optional symbols
if (!S && (Config->ExportAll || Config->ExportedSymbols.count(Name) != 0))
S = insertName(Name).first;
else if (!S || S->isDefined())