[llvm] [ConstantFolding] Support bitcasting vectors to smaller element sizes with non-integer ratios. (PR #179640)

[Kacper Doga via llvm-commits]

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@@ -903,3 +903,16 @@ end:                                        ; preds = %unreachable, %entry
   %3 = extractelement <2 x i16> %2, i64 0
   ret i16 %3
 }
+
+; Ensure we do not crash when constant folding bitcasts of exotic vector types
+define <3 x i8> @bitcast_exotic_vector_type(<3 x i32> %LGV) {
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varev-dev wrote:

Moved tests to different destination, applied naming convention that is used in that test file.

https://github.com/llvm/llvm-project/pull/179640