[WebAssembly] Respect `--no-mangle` in more locations

`--no-demangle` now also applies to the name section.  This change
was motivated by the rust team that have a slightly different name
mangling scheme to the standard C++ itanium one and prefer to do their
de-mangling as a post-link setp.

Patch by Alex Crichton!

Differential Revision: https://reviews.llvm.org/D54279

llvm-svn: 346516

1 files changed, 6 insertions, 2 deletions

diff --git a/lld/wasm/Symbols.cpp b/lld/wasm/Symbols.cpp
index 035c7f2d725..0e60262dcc8 100644
--- a/lld/wasm/Symbols.cpp
+++ b/lld/wasm/Symbols.cpp
@@ -226,10 +226,14 @@ void SectionSymbol::setOutputSectionIndex(uint32_t Index) {
 void LazySymbol::fetch() { cast<ArchiveFile>(File)->addMember(&ArchiveSymbol); }
 
 std::string lld::toString(const wasm::Symbol &Sym) {
+  return lld::maybeDemangleSymbol(Sym.getName());
+}
+
+std::string lld::maybeDemangleSymbol(StringRef Name) {
   if (Config->Demangle)
-    if (Optional<std::string> S = demangleItanium(Sym.getName()))
+    if (Optional<std::string> S = demangleItanium(Name))
       return *S;
-  return Sym.getName();
+  return Name;
 }
 
 std::string lld::toString(wasm::Symbol::Kind Kind) {