[clang] [CIR] Add support for thread-local storage (TLS) (PR #168662)

[Andy Kaylor via cfe-commits]

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@@ -1672,7 +1527,10 @@ cir::GetGlobalOp::verifySymbolUses(SymbolTableCollection &symbolTable) {
   if (auto g = dyn_cast<GlobalOp>(op)) {
     symTy = g.getSymType();
     assert(!cir::MissingFeatures::addressSpace());
-    assert(!cir::MissingFeatures::opGlobalThreadLocal());
+    // Verify that for thread local global access, the global needs to
+    // be marked with tls bits.
+    if (getTls() && !g.getTlsModel())
+      return emitOpError("access to global not marked thread local");
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andykaylor wrote:

Can you create an invalid CIR test to test this? You can use `clang/test/CIR/IR/invalid-func-attr.cir` as an example to base your new test on.

https://github.com/llvm/llvm-project/pull/168662