[PATCH] D107219: [LICM] Support sinking in LNICM

[Whitney Tsang via Phabricator via llvm-commits]

Whitney added inline comments.


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Comment at: llvm/test/Transforms/LICM/lnicm-sink.ll:15
+;     }
+;     y[i] = s;
+;   }
----------------
uint256_t wrote:
> Whitney wrote:
> > Why `y[i] = s;` is needed for this test case?
> It is to show that LNICM maintains perfect loop nest.
> LICM sinks `s = abs(i);` to right before `y[i] = s;`, whereas LNICM doesn't do so.
Why wouldn't LICM sink `s = abs(i);` without `y[i] = s;`?


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D107219/new/

https://reviews.llvm.org/D107219