[all-commits] [llvm/llvm-project] 1d1f7e: [InstCombine] Add regression test cases for bitrev...

[Austin Chang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1d1f7eeee6bf38ef35083f676875950b4f5528f7
      https://github.com/llvm/llvm-project/commit/1d1f7eeee6bf38ef35083f676875950b4f5528f7
  Author: Austin Chang <austin880625 at gmail.com>
  Date:   2023-05-25 (Thu, 25 May 2023)

  Changed paths:
    M llvm/test/Transforms/InstCombine/bitreverse.ll

  Log Message:
  -----------
  [InstCombine] Add regression test cases for bitreverse optimization; NFC

Fold the following case on IR InstCombine pass. This patch includes the new test cases for this optimization

```
bitreverse(logic_op(x, bitreverse(y))) -> logic_op(bitreverse(x), y)
bitreverse(logic_op(bitreverse(x), y)) -> logic_op(x, bitreverse(y))
bitreverse(logic_op(bitreverse(x), bitreverse(y))) -> logic_op(x, y) with multi-use
```

Reviewed By: goldstein.w.n

Differential Revision: https://reviews.llvm.org/D151245


  Commit: 68c5d46b6ec46c59afa052d2b2945ca7b22f58d6
      https://github.com/llvm/llvm-project/commit/68c5d46b6ec46c59afa052d2b2945ca7b22f58d6
  Author: Austin Chang <austin880625 at gmail.com>
  Date:   2023-05-25 (Thu, 25 May 2023)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
    M llvm/test/Transforms/InstCombine/bitreverse.ll

  Log Message:
  -----------
  [InstCombine] Improve bitreverse optimization

This patch utilizes the helper function implemented in D149699 and thus folds the following cases:

```
bitreverse(logic_op(x, bitreverse(y))) -> logic_op(bitreverse(x), y)
bitreverse(logic_op(bitreverse(x), y)) -> logic_op(x, bitreverse(y))
bitreverse(logic_op(bitreverse(x), bitreverse(y))) -> logic_op(x, y) in multiuse case
```

Reviewed By: goldstein.w.n, RKSimon

Differential Revision: https://reviews.llvm.org/D151246


Compare: https://github.com/llvm/llvm-project/compare/171dfc5462a2...68c5d46b6ec4