[llvm] LICM: extend hoist BO assoc to mul case (PR #106991)

[Nikita Popov via llvm-commits]

================
@@ -47,7 +67,31 @@ loop:
   br label %loop
 }
 
-; Fold ADD but don't copy NUW if only one op has it.
+; Hoist MUL and drop NUW if both ops have it.
----------------
nikic wrote:

```suggestion
; Hoist MUL and drop NUW even if both ops have it.
```

https://github.com/llvm/llvm-project/pull/106991