[llvm] VectorCombine: add tests written for InstSimplify (PR #92776)

[David Green via llvm-commits]

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@@ -764,5 +922,33 @@ define <4 x i8> @singleop(<4 x i8> %a, <4 x i8> %b) {
   ret <4 x i8> %r
 }
 
+define <4 x i64> @cast_mismatched_types(<4 x i32> %x) {
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davemgreen wrote:

Is this different to zext_mismatched_types? Same for the one below.

https://github.com/llvm/llvm-project/pull/92776