[all-commits] [llvm/llvm-project] 29f45e: [mlir][Transforms] GreedyPatternRewriteDriver: Add...

[Matthias Springer via All-commits]

  Branch: refs/heads/users/matthias-springer/greedy_rewrite_cse_constants
  Home:   https://github.com/llvm/llvm-project
  Commit: 29f45ee1c6b1c74cc465f2b372ea2fe2dae78e7e
      https://github.com/llvm/llvm-project/commit/29f45ee1c6b1c74cc465f2b372ea2fe2dae78e7e
  Author: Matthias Springer <springerm at google.com>
  Date:   2024-04-21 (Sun, 21 Apr 2024)

  Changed paths:
    M mlir/include/mlir/Transforms/GreedyPatternRewriteDriver.h
    M mlir/include/mlir/Transforms/Passes.td
    M mlir/lib/Transforms/Canonicalizer.cpp
    M mlir/lib/Transforms/Utils/GreedyPatternRewriteDriver.cpp
    M mlir/test/Transforms/test-canonicalize.mlir

  Log Message:
  -----------
  [mlir][Transforms] GreedyPatternRewriteDriver: Add flag to control constant CSE'ing

By default, the greedy pattern rewrite driver CSE's constant ops. If an op is CSE'd with an op in a parent region, the op is effectively "hoisted". Over the last years, users have described situations where this is not desirable/necessary. This commit adds a new flag to `GreedyRewriteConfig` that controls CSE'ing of constants. For testing purposes, it is also exposed as a canonicalizer pass flag.



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