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Just want to know a bit more about background of this change. Are you making an ABI-breaking change, so you are defining a new ABI version number for the AMDGPU target. Is this understanding correct? Is the AMDGPU target migrating to ABI version 2, or will version 1 and 2 co-exist in the future?
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Yes, we are making an ABI-breaking change for amdgcn-amd-amdhsa, hence we are bumping ABI version to 1 for amdgcn-amd-amdhsa. Currently ABI versions 0 and 1 will co-exist in our backend. In the future, I am hoping we can drop ABI version 0 from our backend and only produce ABI version 1. I am not exactly sure where you got ABI version 2 from.
Our shared object loader and runtimes will keep supporting both variations of ABI versions.