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match_buffer inside a block allow users to mark a subregion of the source buffer into a new target buffer. In the following example it does the same job as A[i, j] = 1

with block([128, 128]) as [i, j]:
    A0 = tir.match_buffer(A[i, j], ())
    A0[()] = 1

A further step, it is useful for opaque access (e.g. Tensor intrinsic). It can narrow the access region, also provide some additional information, such as strides and shape for buffer after the pass CompactBuffer. Please see details at a Tensorcore demo with match_buffer in file tests/python/integration/test_lower.py

Please take a look. thanks a lot. @vinx13 @junrushao1994 @tqchen

Hzfengsy and others added 6 commits July 30, 2021 01:32
* support match_buffer_region

(cherry picked from commit 682ca84cf44d1c0aaf98440effc13e12141cf8e0)

* some fix

* change match_buffer_region to match_buffer

* fix printer and parser

* update testcase

* Apply suggestions from code review

Co-authored-by: Wuwei Lin <wuwei@apache.org>
* add match_buffer support to access ditector

(cherry picked from commit b93a593c39a56ebb22c1dce70bfbd4484e581750)

* add match_buffer support to lca ditector

* tensorcore script

* finish e2e tensorcore script

* finish e2e tensorcore script
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LGTM

@junrushao junrushao merged commit 2a8950b into apache:main Jul 31, 2021
@Hzfengsy Hzfengsy deleted the subregion branch August 25, 2021 05:23
ylc pushed a commit to ylc/tvm that referenced this pull request Sep 29, 2021
Co-authored-by: Junru Shao <junrushao1994@gmail.com>
Co-authored-by: Bohan Hou <32121147+spectrometerHBH@users.noreply.github.com>
Co-authored-by: Ruihang Lai <lairuihangdongdong@qq.com>
Co-authored-by: Hongyi Jin <3231950289@qq.com>
Co-authored-by: Wuwei Lin <wuwei@apache.org>
ylc pushed a commit to ylc/tvm that referenced this pull request Jan 13, 2022
Co-authored-by: Junru Shao <junrushao1994@gmail.com>
Co-authored-by: Bohan Hou <32121147+spectrometerHBH@users.noreply.github.com>
Co-authored-by: Ruihang Lai <lairuihangdongdong@qq.com>
Co-authored-by: Hongyi Jin <3231950289@qq.com>
Co-authored-by: Wuwei Lin <wuwei@apache.org>
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4 participants