[llvm] [SelectionDAG] Use unaligned store to move AVX registers onto stack for `extractelement` (PR #78422)

[Simon Pilgrim via llvm-commits]

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@@ -0,0 +1,23 @@
+; RUN: llc < %s  | FileCheck %s
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RKSimon wrote:

regenerate with the update_llc_test_checks helper script

https://github.com/llvm/llvm-project/pull/78422