[llvm] [VPlan] Lower BranchOnTwoConds to chain of 2 simple branches. (PR #174016)

[via llvm-commits]

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@@ -3760,42 +3760,40 @@ void VPlanTransforms::expandBranchOnTwoConds(VPlan &Plan) {
 
   // Expand BranchOnTwoConds instructions into explicit CFG with
   // single-condition branches, by introducing a new branch in VPBB that jumps
-  // to a new intermediate block if either condition is true and to the
-  // third successor otherwise. The intermediate block jumps to the first or
-  // second successor, depending on the first condition.
+  // to the first successor if the first condition is true, and a new
+  // intermediate block otherwise. The intermediate block jumps to the second
+  // successor if the second condition is true, otherwise to the third
+  // successor.
----------------
ayalz wrote:

```suggestion
  // 1. A branch that replaces BranchOnTwoConds, jumps to the first successor if
  // the first condition is true, and otherwise jumps to a new interim block. 
  // 2. A branch that ends the interim block, jumps to the second successor if
  // the second condition is true, and otherwise jumps to the third successor.
```

https://github.com/llvm/llvm-project/pull/174016