================
@@ -1980,6 +1981,23 @@ static void handleWeakRefAttr(Sema &S, Decl *D, const
ParsedAttr &AL) {
D->addAttr(::new (S.Context) WeakRefAttr(S.Context, AL));
}
+// Mark alias/ifunc target as used. For C++, we look up the demangled name
+// ignoring parameters. This should handle the majority of use cases while
+// leaveing false positives for namespace scope names and false negatives in
+// the presence of overloads.
+static void markUsedForAliasOrIfunc(Sema &S, Decl *D, const ParsedAttr &AL,
+ StringRef Str) {
+ char *Demangled = llvm::itaniumDemangle(Str, /*ParseParams=*/false);
----------------
MaskRay wrote:
I added a `S.getASTContext().getCXXABIKind() != TargetCXXABI::Microsoft` check.
Note: while `alias` works for Windows, it is only checked in tests
CodeGenCXX/visibility-dllstorageclass.cpp/CodeGen/debug-info-alias-pointer.c .
I don't consider it used publicly.
I've also updated the description to say that our behavior is different from
GCC for `extern "C" { static void f(); }`. So, the C++ handling is best-effort.
https://github.com/llvm/llvm-project/pull/87130
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