[clang] [clang]: support std::meta::info for primitive types (PR #190356)

[Nhat Nguyen via cfe-commits]

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@@ -1,6 +1,10 @@
 // RUN: %clang_cc1 -std=c++26 -freflection -triple x86_64-unknown-linux-gnu \
 // RUN:   -emit-llvm -o - %s -verify
 
+constexpr auto r = ^^int;
+constexpr auto q = r;
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changkhothuychung wrote:

@Sirraide now I realized that the test file name is making it look confusing. I added those to test that there will be no codegen for variable r and q, as they are consteval-only. Currently we haven't had any work for mangling yet. 

https://github.com/llvm/llvm-project/pull/190356