[clang] [llvm] InstCombine: Order shufflevector operands by complexity (PR #113212)

[Matthias Braun via llvm-commits]

MatzeB wrote:

> Please push the revised clang tests as a separate patch.

Submitted #113714 for the test updates (still included here for "stacking")

https://github.com/llvm/llvm-project/pull/113212