[clang] [ClangIR] Support bool-returning await_suspend (PR #227527)

[Aman Maurya via cfe-commits]

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@@ -5331,12 +5333,25 @@ def CIR_CoroSuspendPoint : CIR_Op<"coro.suspend_point", [
     - destroy: transfers through the enclosing `cir.cleanup.scope`s to the
       `cir.coroutine`'s `destroy` region when the coroutine handle is
       destroyed.
+
+    When the optional `cond` operand is present, a `false` value vetoes the
+    suspension and control branches directly to the `resume` region of the
+    enclosing `cir.await`. A `true` value indicates the coroutine actually
+    suspends.
   }];
 
+  let arguments = (ins Optional<CIR_AnyBoolType>:$cond);
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amanmaurya92 wrote:

Great ideas, thank you! I'll tackle both in a follow-up PR.

https://github.com/llvm/llvm-project/pull/227527