d481e5f9b7
AMDGCN flavoured SPIR-V allows AMDGCN specific builtins, including those for scoped fences and some specific RMWs. However, at present we don't map syncscopes to their SPIR-V equivalents, but rather use the AMDGCN ones. This ends up pessimising the resulting code as system scope is used instead of device (agent) or subgroup (wavefront), so we correct the behaviour, to ensure that we do the right thing during reverse translation.
The LLVM Compiler Infrastructure
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