lebedev.ri added a comment. To reword, if `vectorize_assume_alignment(32)` is *NOT* lowered via `CodeGenFunction::EmitAlignmentAssumption()` in clang frontend, but lowered into `LoopAttributes::VectorizeAssumeAlignment`, then once the alignment that was specified does not match reality, there will be a miscompile instead of an UBSan error.
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