[cfe-dev] Invalid Use Diagnostic

[Bill Wendling via cfe-dev]

I'm currently working on asm goto with return values. For the first
iteration, I want to limit the use of return values to the "normal" path.
Therefore, I would like to issue a diagnostic if the use is in the
"abnormal" path that doesn't first go through the "normal" code. I'm not
very familiar with how clang determines such things. How can this be done?

-bw
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