[clang] [llvm] [clang] Add "debug_transparent" attribute (PR #109490)

[Paul T Robinson via llvm-commits]

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@@ -109,6 +110,21 @@ static bool IsArtificial(VarDecl const *VD) {
                               cast<Decl>(VD->getDeclContext())->isImplicit());
 }
 
+static bool usesDebugTransparent(const Decl *D, const CodeGenModule &CGM) {
+  if (!D)
+    return false;
+
+  if (auto *attr = D->getAttr<DebugTransparentAttr>()) {
+    auto opts = CGM.getCodeGenOpts();
+    if (opts.DwarfVersion == 0) {
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pogo59 wrote:

I can't remember: if we compile with no debug info (-g0, or omit -g) is the DwarfVersion still set or is it zero? We don't want to be emitting a diagnostic just because it's a release build.

Also: No test for the emitted diagnostic (which would have told me the conditions for when it is/is-not emitted).

https://github.com/llvm/llvm-project/pull/109490