[llvm] [InstCombine] Resolve TODO: Remove one-time check if other logic operand (Y) is constant (PR #77973)

[Nikita Popov via llvm-commits]

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@@ -240,6 +240,35 @@ define i32 @lshr_or_extra_use(i32 %x, i32 %y, ptr %p) {
   ret i32 %sh1
 }
 
+define i32 @lshr_or_extra_use_multiuse(i32 %x, ptr %p) {
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nikic wrote:

```suggestion
define i32 @lshr_or_extra_use_shift(i32 %x, ptr %p) {
```
Or something. extra_use and multiuse are the same thing, so using both makes no sense.

https://github.com/llvm/llvm-project/pull/77973