[clang] [llvm] [MTE] Add an attribute to opt-in memory tagging of global variables while using fsanitize=memtag-globals (#166380) (PR #168535)

[Florian Mayer via llvm-commits]

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@@ -6141,6 +6145,9 @@ void CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D,
   if (NeedsGlobalCtor || NeedsGlobalDtor)
     EmitCXXGlobalVarDeclInitFunc(D, GV, NeedsGlobalCtor);
 
+  if (D->hasAttr<ForceMemtagAttr>()) {
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fmayer wrote:

nit: drop braces as per llvm style guide

https://github.com/llvm/llvm-project/pull/168535