[clang] [clang] "modular_format" attribute for functions using format strings (PR #147431)

[Erich Keane via cfe-commits]

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@@ -2559,6 +2559,19 @@ void CodeGenModule::ConstructAttributeList(StringRef Name,
 
     if (TargetDecl->hasAttr<ArmLocallyStreamingAttr>())
       FuncAttrs.addAttribute("aarch64_pstate_sm_body");
+
+    if (auto *ModularFormat = TargetDecl->getAttr<ModularFormatAttr>()) {
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erichkeane wrote:

`getAttr` will work if there is a single attribute only in the AST.  It looks like that is the case, so this is fine.

https://github.com/llvm/llvm-project/pull/147431