[llvm] [LoopFusion] Extending SIV to handle separate loops (PR #146383)

[via llvm-commits]

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@@ -298,42 +298,51 @@ bb23:                                             ; preds = %bb17, %bb
   ret void
 }
 
+; void forward_dep(int *arg) {
+;     for (int i = 0; i < 100; i++) {
+;         int tmp = i - 3;
+;         int val = tmp * (i + 3) % i;
+;         arg[i] = val;
+;     }
+; 
+;     for (int j = 0; j < 100; j++) {
+;         int val = arg[j - 3];
+;         arg[j] = val * 3;
+;     }
+; }
+;
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CongzheUalberta wrote:

This function was not fused previously, and now with your patch it is fused. Can you add some comment here to describe it like why it can be fused now?

https://github.com/llvm/llvm-project/pull/146383