[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, 2 insertions, 4 deletions

diff --git a/lld/wasm/Driver.cpp b/lld/wasm/Driver.cpp
index acdb5f93f15..d9060939646 100644
--- a/lld/wasm/Driver.cpp
+++ b/lld/wasm/Driver.cpp
@@ -310,10 +310,8 @@ static void handleWeakUndefines() {
 
     // Add a synthetic dummy for weak undefined functions.  These dummies will
     // be GC'd if not used as the target of any "call" instructions.
-    Optional<std::string> SymName = demangleItanium(Sym->getName());
-    StringRef DebugName =
-        Saver.save("undefined function " +
-                   (SymName ? StringRef(*SymName) : Sym->getName()));
+    std::string SymName = toString(*Sym);
+    StringRef DebugName = Saver.save("undefined function " + SymName);
     SyntheticFunction *Func =
         make<SyntheticFunction>(Sig, Sym->getName(), DebugName);
     Func->setBody(UnreachableFn);