[llvm] [ARM] Prefer MUL to MULS on some implementations (PR #112540)

[David Green via llvm-commits]

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@@ -63,5 +63,5 @@ body:             |
 
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davemgreen wrote:

This is probably a better place for this coment:
A lot of the IR in this test case can be removed, to help simplify it a bit. It might be possible to remove the entire ir section and have two run lines that run with/without -mcpu=cortex-m33. That way it can test that both versions with the muls and with the mul are working OK.

https://github.com/llvm/llvm-project/pull/112540