[all-commits] [llvm/llvm-project] 9bc310: [mlir][scf] Extend consumer fusion to multiple til...

[Yun-Fly via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9bc3102bea80f422f4f3b788186f6e1c636e0fba
      https://github.com/llvm/llvm-project/commit/9bc3102bea80f422f4f3b788186f6e1c636e0fba
  Author: Yun-Fly <yunfei.song at intel.com>
  Date:   2024-11-06 (Wed, 06 Nov 2024)

  Changed paths:
    M mlir/lib/Dialect/SCF/Transforms/TileUsingInterface.cpp
    M mlir/test/Interfaces/TilingInterface/tile-and-fuse-consumer.mlir
    M mlir/test/lib/Interfaces/TilingInterface/TestTilingInterfaceTransformOps.cpp
    M mlir/test/lib/Interfaces/TilingInterface/TestTilingInterfaceTransformOps.td

  Log Message:
  -----------
  [mlir][scf] Extend consumer fusion to multiple tilable users (#111955)

Before, consumer fusion expects single usage(or others are terminator
op). This patch supports multiple tilable consumers fusion. 
E.g.
```
%0 = scf.for {
  ...
  %p = tiledProducer
  ...
}
%1 = tilableConsumer1 ins(%0 : ...)
%2 = tilableConsumer2 ins(%0 : ...)
```
===>
```
%0:3 = scf.for {
  ...
  %p = tiledProducer
  %1 = tiledConsumer1 ins(%p : ...)
  %2 = tiledConsumer2 ins(%p : ...)
  ...
}
```
The key process is ensuring that the first user of loop 
should not dominate any define of consumer operand(s).



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