[PATCH] D91481: [LoopUnroll] Discount uniform instructions in cost models

[Whitney Tsang via Phabricator via llvm-commits]

Whitney added inline comments.


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Comment at: llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp:769
+    // iterations.  We should break the backedge, not unroll that.
+    if (LocalUniformSize + UP.BEInsns + 1 > LoopSize)
+      LocalUniformSize = 0;
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Do we need a test case for this case where the loop is not unrolled because the entire loop body is uniform?


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  https://reviews.llvm.org/D91481/new/

https://reviews.llvm.org/D91481