[clang] [ItaniumMangle] Make sure class types are added to the dictionary of substitution candidates when compiling for older ABIs (PR #138947)

[Matheus Izvekov via cfe-commits]

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@@ -1,4 +1,5 @@
-// RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-apple-darwin9 -fblocks -std=c++11 | FileCheck %s
+// RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-apple-darwin9 -fblocks -std=c++11 | FileCheck --check-prefixes=CHECK,CHECK-ABI-LATEST %s
+// RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-apple-darwin9 -fblocks -std=c++11 -fclang-abi-compat=4 | FileCheck %s
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mizvekov wrote:

I  believe 'clang/test/CodeGenCXX/clang-abi-compat.cpp' is the right place for adding this test.

https://github.com/llvm/llvm-project/pull/138947