[llvm] [LV] Allow partial reductions with an extended bin op (PR #165536)

[Sam Tebbs via llvm-commits]

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@@ -467,83 +467,3 @@ loop:
 exit:
   ret i32 %red.next
 }
-
-define i64 @partial_reduction_mul_two_users(i64 %n, ptr %a, i16 %b, i32 %c) {
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SamTebbs33 wrote:

I had to remove this test because it no longer tests what we want it to test. It's been replaced by a print test that makes sure that an `ExtendedReduction` is created instead of an `ExtendedMulAccReduction`.

https://github.com/llvm/llvm-project/pull/165536