[llvm] [MCA] Adding missing instructions in AArch64 Neoverse V1 tests (PR #128892)

[David Green via llvm-commits]

davemgreen wrote:

> I moved bl in unconditionnal branch (immediate section. For crc32, other crc32 instructions were not in basic test, so I've just added in forwarding test... I did not found any dependence graph built in llvm-mca, so not easy to check forwarding between instructions:
> 
> * `instr1 a, b, c`
> * `instr2 d, a, e`
> 
> Where `a` should be forwarded to source operand 1 of `instr2`. Do you confirm?

It is shown in the pipeline diagram, which shows forwarding from crc32cb->crc32cb in the first operand, but not from mul->crc32cb and not from crc32cb->crc32cb with the second operand (or from crc32cb->mul, they all take 2 cycles as opposed to 1):
```
# CHECK:      [0,0]     DeeER.    .    ..   mul	w0, w0, w0
# CHECK-NEXT: [0,1]     D==eeER   .    ..   crc32cb	w0, w0, w1
# CHECK-NEXT: [0,2]     D===eeER  .    ..   crc32cb	w0, w0, w1
# CHECK-NEXT: [0,3]     D=====eeER.    ..   crc32cb	w0, w0, w0
# CHECK-NEXT: [1,0]     D=======eeER   ..   mul	w0, w0, w0
# CHECK-NEXT: [1,1]     D=========eeER ..   crc32cb	w0, w0, w1
# CHECK-NEXT: [1,2]     D==========eeER..   crc32cb	w0, w0, w1
# CHECK-NEXT: [1,3]     D============eeER   crc32cb	w0, w0, w0
```

It sounds like it is worth adding the instructions to V1-basic-instructions.s to make sure we have complete coverage of them all separate from where we forward.

https://github.com/llvm/llvm-project/pull/128892