[clang] [clang] Avoid -Wshadow warning when init-capture named same as class field (PR #74512)

[Shafik Yaghmour via cfe-commits]

================
@@ -8395,10 +8395,11 @@ void Sema::CheckShadow(NamedDecl *D, NamedDecl 
*ShadowedDecl,
 
   unsigned WarningDiag = diag::warn_decl_shadow;
   SourceLocation CaptureLoc;
-  if (isa<VarDecl>(D) && isa<VarDecl>(ShadowedDecl) && NewDC &&
-      isa<CXXMethodDecl>(NewDC)) {
+  if (isa<VarDecl>(D) && NewDC && isa<CXXMethodDecl>(NewDC)) {
     if (const auto *RD = dyn_cast<CXXRecordDecl>(NewDC->getParent())) {
       if (RD->isLambda() && OldDC->Encloses(NewDC->getLexicalParent())) {
+        if (!isa<VarDecl>(ShadowedDecl))
----------------
shafik wrote:

Maybe a comment here along the lines of "if it is not VarDecl then it can not 
shadow" I am not sure if that implies it must be a capture but I think it does.

https://github.com/llvm/llvm-project/pull/74512
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