[clang] [CIR] Add addLLVMUsed and addLLVMCompilerUsed methods to CIRGenModule (PR #188189)

[via cfe-commits]

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@@ -658,13 +658,33 @@ void CIRGenModule::setCommonAttributes(GlobalDecl gd, mlir::Operation *gv) {
   if (isa_and_nonnull<NamedDecl>(d))
     setGVProperties(gv, dyn_cast<NamedDecl>(d));
   assert(!cir::MissingFeatures::defaultVisibility());
-  assert(!cir::MissingFeatures::opGlobalUsedOrCompilerUsed());
+
+  if (auto gvi = mlir::dyn_cast<cir::CIRGlobalValueInterface>(gv)) {
+    if (d && d->hasAttr<UsedAttr>())
+      addUsedOrCompilerUsedGlobal(gvi);
+
+    if (const auto *vd = dyn_cast_if_present<VarDecl>(d);
+        vd && ((codeGenOpts.KeepPersistentStorageVariables &&
+                (vd->getStorageDuration() == SD_Static ||
+                 vd->getStorageDuration() == SD_Thread)) ||
+               (codeGenOpts.KeepStaticConsts &&
+                vd->getStorageDuration() == SD_Static &&
+                vd->getType().isConstQualified())))
+      addUsedOrCompilerUsedGlobal(gvi);
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skc7 wrote:

Thanks for feedback. Added this test.

https://github.com/llvm/llvm-project/pull/188189