[PATCH] D133586: [clang] do not hash undefined qualifiers for FunctionNoProtoType

[Richard Trieu via Phabricator via cfe-commits]

rtrieu added a comment.

In D133586#3781468 <https://reviews.llvm.org/D133586#3781468>, @rmaz wrote:

> In D133586#3781381 <https://reviews.llvm.org/D133586#3781381>, @rtrieu wrote:
>
>> Do you have a test case for this?
>
> Was struggling to think of a good one. How about a test that repeatedly generates a pcm for a func decl with no params and checks if the DECL_FUNCTION record is the same?

Have you looked at clang/test/Modules/odr_hash.cpp?  It's where most of the ODR hash testing takes place by testing that Decls can be merged properly instead of checking the contents of pcm files..  Using `#if define`, it creates multiple modules from the same file.  I would suggest creating two functions in each of the modules, then in the main file, using the function to force it to be loaded from the modules and merged together.  The test should fail with the current Clang, but pass with your patch.  You may need to create your test file if you need different compiler options.


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