[clang] [llvm] [Coroutines] Mark parameter allocas with coro.outside.frame metadata (PR #127653)

[Reid Kleckner via llvm-commits]

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@@ -190,3 +210,38 @@ method some_class::good_coroutine_calls_custom_constructor(float) {
   // CHECK: invoke void @_ZNSt16coroutine_traitsIJ6methodR10some_classfEE12promise_typeC1ES2_f(ptr {{[^,]*}} %__promise, ptr noundef nonnull align 1 dereferenceable(1) %{{.+}}, float
   co_return;
 }
+
+
+struct MSParm {
+  int val;
+  ~MSParm();
+};
+
+void consume(int) noexcept;
+
+// Similarly to the [[clang::trivial_abi]] parameters, with the MSVC ABI
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rnk wrote:

Right, this is a good edge case to motivate generalizing this for all parameters.

https://github.com/llvm/llvm-project/pull/127653