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30f18ed387
Summary: This fixes a few issues related to SMRD offsets. On gfx9 and gfx10 we have a signed byte offset immediate, however we can overflow into a negative since we treat it as unsigned. Also, the SMRD SOFFSET sgpr is an unsigned offset on all subtargets. We sometimes tried to use negative values here. Third, S_BUFFER instructions should never use a signed offset immediate. Differential Revision: https://reviews.llvm.org/D77082
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