[ETHOSU] Add early simplify to fix LoopPartition #9387
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Certain loops aren't correctly partitioned if the loop condition hasn't been simplified. This can happen when a copy loop is split by a non-factor. To fix this, an additional simplify pass is added to the TIR pipeline prior to LoopPartition. Change-Id: Icd4ff14648ccaed41384da50c6d183a122b30048
mbaret
requested review from
anijain2305,
areusch,
comaniac,
jroesch,
junrushao,
jwfromm,
MarisaKirisame,
mbrookhart,
merrymercy,
slyubomirsky,
tqchen,
vinx13,
wweic,
yzhliu,
zhiics and
ZihengJiang
as code owners
|
Just for enlightenment, what's a "non-factor" and what does the Simplify pass do to help us? Otherwise, LGTM! |
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A non-factor split would be one where, for instance, we want to split an axis of length 16 into stripes of length 7, so we'd get two stripes of 7 plus a residual of 2. This contrasts with a factor split which would be something like 8. In handling the edge case behaviour, some 'if' statements get inserted into TIR, and for I reason I don't fully understand these confuse LoopPartition unless their condition is simplified with the Simplify pass. |
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Thanks for the PR! @mbaret . |
Change-Id: I9c9dc2ee2c679861866b23531e88584b94198e51
mbaret
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Good spot, forgot the fmt off :) I've fixed that now. |
leandron
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Nov 1, 2021
ylc
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Jan 7, 2022
* [ETHOSU] Add early simplify to fix LoopPartition Certain loops aren't correctly partitioned if the loop condition hasn't been simplified. This can happen when a copy loop is split by a non-factor. To fix this, an additional simplify pass is added to the TIR pipeline prior to LoopPartition. Change-Id: Icd4ff14648ccaed41384da50c6d183a122b30048 * Fix linting again Change-Id: I9c9dc2ee2c679861866b23531e88584b94198e51
ylc
pushed a commit
to ylc/tvm
that referenced
this pull request
Jan 13, 2022
* [ETHOSU] Add early simplify to fix LoopPartition Certain loops aren't correctly partitioned if the loop condition hasn't been simplified. This can happen when a copy loop is split by a non-factor. To fix this, an additional simplify pass is added to the TIR pipeline prior to LoopPartition. Change-Id: Icd4ff14648ccaed41384da50c6d183a122b30048 * Fix linting again Change-Id: I9c9dc2ee2c679861866b23531e88584b94198e51
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Certain loops aren't correctly partitioned if the loop condition hasn't been simplified. This can happen when a copy loop is split by a non-factor. To fix this, an additional simplify pass is added to the TIR pipeline prior to LoopPartition.