[llvm] LICM: hoist BO assoc when (C1 op LV) op C2 (PR #106999)

[Nikita Popov via llvm-commits]

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@@ -2803,15 +2803,19 @@ static bool hoistMulAddAssociation(Instruction &I, Loop &L,
 
 /// Reassociate associative binary expressions of the form
 ///
-/// 1. "(LV op C1) op C2" ==> "LV op (C1 op C2)"
+/// 1. "(LV op C1) op C2" ==> "LV op (C1 op C2)" if op is an associative BinOp
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nikic wrote:

I think it would have been sufficient here to copy 2. up, because the rest of the comment applies to both cases -- we don't need to separately explain the meaning of LV/C1/C2 for each case.

https://github.com/llvm/llvm-project/pull/106999