[clang] [CIR][EH] Implement EH ABI lowering for dynamic exception specification (PR #223862)

[Erich Keane via cfe-commits]

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@@ -4670,26 +4671,52 @@ mlir::LogicalResult CIRToLLVMEhInflightOpLowering::matchAndRewrite(
       rewriter.setInsertionPointToStart(entryBlock);
       mlir::Value addrOp = mlir::LLVM::AddressOfOp::create(
           rewriter, loc, llvmPtrTy, symAttr.getValue());
-      catchSymAddrs.push_back(addrOp);
+      landingPadClauses.push_back(addrOp);
     }
   }
 
   // Emit a catch-all clause (catch ptr null) when:
   //   - The catch_all attribute is set (typed catches + catch-all), or
-  //   - No typed catches and no cleanup (legacy pure catch-all form)
-  if (op.getCatchAll() || (!catchListAttr && !op.getCleanup())) {
+  //   - No typed catches, no cleanup, and no filter (legacy pure catch-all)
+  if (op.getCatchAll() ||
+      (!catchListAttr && !op.getCleanup() && !filterListAttr)) {
     mlir::OpBuilder::InsertionGuard guard(rewriter);
     rewriter.setInsertionPointToStart(entryBlock);
     mlir::Value nullOp = mlir::LLVM::ZeroOp::create(rewriter, loc, llvmPtrTy);
-    catchSymAddrs.push_back(nullOp);
+    landingPadClauses.push_back(nullOp);
+  }
+
+  if (filterListAttr) {
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erichkeane wrote:

I kinda wish we could combine the 3 if statements here/above into a structure that is a bit more organized.  This whole bit is pretty disjoint... 

https://github.com/llvm/llvm-project/pull/223862