[RISCV] Add a combine to form masked.load from unit strided load #65674
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Add a DAG combine to form a masked.load from a masked_strided_load intrinsic with stride equal to element size. This covers a couple of extra test cases, and allows us to simplify and common some existing code on the concat_vector(load, ...) to strided load transform.
topperc
reviewed
Sep 7, 2023
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| // If the stride is equal to the element size in bytes, we can use | ||
| // a masked.load. | ||
| const unsigned ElementSizeInBits = VT.getScalarType().getSizeInBits(); |
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getScalarStoreSize()? Which will return the size in bytes.
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ping |
lukel97
approved these changes
Sep 11, 2023
Yes. However, I'm focused on generic IR codegen and don't care too much about intrinsic usage. (Edit: For context, the strided load intrinsic is mostly a detail of our gather lowering, the others are user written intrinsics.) |
AntonRydahl
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Sep 11, 2023
…m#65674) Add a DAG combine to form a masked.load from a masked_strided_load intrinsic with stride equal to element size. This covers a couple of extra test cases, and allows us to simplify and common some existing code on the concat_vector(load, ...) to strided load transform. This is the first in a mini-patch series to try and generalize our strided load and gather matching to handle more cases, and common up different approaches to the same problems in different places.
preames
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Sep 18, 2023
Add a DAG combine to form a masked.store from a masked_strided_store intrinsic with stride equal to element size. This is the store analogy to PR llvm#65674. As seen in the tests, this does pickup a few cases that we'd previously missed due to selection ordering. We match strided stores early without going through the recently added generic mscatter combines, and thus weren't recognizing the unit strided store.
ZijunZhaoCCK
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Sep 19, 2023
…m#65674) Add a DAG combine to form a masked.load from a masked_strided_load intrinsic with stride equal to element size. This covers a couple of extra test cases, and allows us to simplify and common some existing code on the concat_vector(load, ...) to strided load transform. This is the first in a mini-patch series to try and generalize our strided load and gather matching to handle more cases, and common up different approaches to the same problems in different places.
lukel97
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Sep 19, 2023
This is the VP equivalent of llvm#65674. We already combine MGATHER loads with unit stride to MLOAD, so this extends it for EXPERIMENTAL_VP_STRIDED_LOAD.
preames
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Sep 19, 2023
Add a DAG combine to form a masked.store from a masked_strided_store intrinsic with stride equal to element size. This is the store analogy to PR #65674. As seen in the tests, this does pickup a few cases that we'd previously missed due to selection ordering. We match strided stores early without going through the recently added generic mscatter combines, and thus weren't recognizing the unit strided store.
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Add a DAG combine to form a masked.load from a masked_strided_load intrinsic with stride equal to element size. This covers a couple of extra test cases, and allows us to simplify and common some existing code on the concat_vector(load, ...) to strided load transform.
This is the first in a mini-patch series to try and generalize our strided load and gather matching to handle more cases, and common up different approaches to the same problems in different places.