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Posted to commits@tvm.apache.org by GitBox <gi...@apache.org> on 2020/07/13 16:12:28 UTC
[GitHub] [incubator-tvm] kparzysz-quic opened a new pull request #6046: [LLVM] Create TBAA information based on the unrelying buffer type
kparzysz-quic opened a new pull request #6046:
URL: https://github.com/apache/incubator-tvm/pull/6046
Currently, the TBAA information is based on the access type, i.e. the data type from the load or store instruction. When the same
memory area is accessed with different types, the corresponding load/store instruction may end up not being aliased to each other. This could lead to incorrect code being generated.
An example of when such a situation can occur is when two different `buffer_decl`s are created for the same buffer:
```
ba = buffer_decl(... dtype = 'int16' ...)
bb = buffer_decl(data = ba.data, dtype = 'int32x32' ...)
```
Then instructions
```
ba[x] = 0
... = bb[x]
```
may be reordered in the final code due to the alias info indicating that they are not aliased.
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[GitHub] [incubator-tvm] tqchen commented on pull request #6046: [LLVM] Create TBAA information based on the unrelying buffer type
Posted by GitBox <gi...@apache.org>.
tqchen commented on pull request #6046:
URL: https://github.com/apache/incubator-tvm/pull/6046#issuecomment-657825441
Thanks @kparzysz-quic !
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[GitHub] [incubator-tvm] tqchen merged pull request #6046: [LLVM] Create TBAA information based on the unrelying buffer type
Posted by GitBox <gi...@apache.org>.
tqchen merged pull request #6046:
URL: https://github.com/apache/incubator-tvm/pull/6046
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