[llvm] [PowerPC] Add a set of extended mnemonics that are missing from Power 10. (PR #73003)

[Stefan Pintilie via llvm-commits]

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@@ -53,8 +53,8 @@
               wait 4
 
 # CHECK: error: invalid operand for instruction
-# CHECK-NEXT: sync 4
-              sync 4
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stefanp-ibm wrote:

Yes this is unfortunately required. On Power 10 we now have 3 bits instead of just 2 bits for the `sync` instruction and therefore a value of 4 for the argument is now valid. In order for this test to make sure that we get the invalid instruction we need a value that doesn't fit in 3 bits.

https://github.com/llvm/llvm-project/pull/73003