[llvm] [GlobalISel] Migrate remaining generic wip_match_opcode combines to MIR-pattern. (PR #222851)

[Pierre van Houtryve via llvm-commits]

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@@ -559,7 +559,7 @@ define <8 x i8> @no_shuffle_only_some_and_constants(<8 x i8> %src, <8 x i8> %mas
 ; CHECK-GI-NEXT:    mov x8, sp
 ; CHECK-GI-NEXT:    str d0, [sp]
 ; CHECK-GI-NEXT:    and w9, w9, #0x7
-; CHECK-GI-NEXT:    and x9, x9, #0x7
+; CHECK-GI-NEXT:    and x9, x9, #0xff
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Pierre-vh wrote:

All tests look good, but I am wondering why this constant changed. Does it affect semantics ? Is it just due to the `nsz` flag being propagated more often?

https://github.com/llvm/llvm-project/pull/222851