[clang] [Clang] Prevent null pointer dereference in target attribute mangling (PR #94228)

[Eli Friedman via cfe-commits]

================
@@ -1853,18 +1853,26 @@ static std::string getMangledNameImpl(CodeGenModule 
&CGM, GlobalDecl GD,
         break;
       case MultiVersionKind::Target: {
         auto *Attr = FD->getAttr<TargetAttr>();
+        assert(Attr &&
+               "Expected TargetAttr to be present for attribute mangling");
         const ABIInfo &Info = CGM.getTargetCodeGenInfo().getABIInfo();
         Info.appendAttributeMangling(Attr, Out);
         break;
       }
       case MultiVersionKind::TargetVersion: {
         auto *Attr = FD->getAttr<TargetVersionAttr>();
+        assert(
+            Attr &&
+            "Expected TargetVersionAttr to be present for attribute mangling");
----------------
efriedma-quic wrote:

Please split the string in two so the formatting is less awkward.  Otherwise 
LGTM

https://github.com/llvm/llvm-project/pull/94228
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