[llvm] [LV] Add early-exit-with-store tests (PR #140899)

[Graham Hunter via llvm-commits]

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@@ -470,6 +470,192 @@ loop.end:
   ret i64 %retval
 }
 
+define void @loop_contains_store_single_user(ptr dereferenceable(40) noalias %array, ptr align 2 dereferenceable(40) readonly %pred) {
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huntergr-arm wrote:

Changed the name to `@loop_contains_store_condition_load_has_single_user`

https://github.com/llvm/llvm-project/pull/140899