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Previously, instructions without a primary patterns wouldn't get their properties inferred. Now, we use all single-instruction patterns for inference, including 'def : Pat<>' instances. This causes a lot of instruction flags to change. - Many instructions no longer have the UnmodeledSideEffects flag because their flags are now inferred from a pattern. - Instructions with intrinsics will get a mayStore flag if they already have UnmodeledSideEffects and a mayLoad flag if they already have mayStore. This is because intrinsics properties are linear. - Instructions with atomic_load patterns get a mayStore flag because atomic loads can't be reordered. The correct workaround is to create pseudo-instructions instead of using normal loads. PR13693. llvm-svn: 162614 |
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