[PATCH] D71025: [LoopFusion] Restrict loop fusion to rotated loops.

[Whitney Tsang via Phabricator via llvm-commits]

Whitney added inline comments.


================
Comment at: llvm/test/Transforms/LoopFusion/cannot_fuse.ll:42
+bb34:
+  %cmp = icmp slt i32 %N, 50
+  br i1 %cmp, label %bb16, label %bb33
----------------
kbarton wrote:
> Whitney wrote:
> > This guard was not in the original test case, now the second loop has two guards, is that intensional?                    
> Yes, this is intentional to make the two loops not control-flow-equivalent, which is what this specific test is checking. 
The two loops should already be not control-flow-equivalent, as bb7 is not guarded, while bb22 is guarded. Why is the extra guard needed?


Repository:
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  https://reviews.llvm.org/D71025/new/

https://reviews.llvm.org/D71025