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cd83d3eb24
There are some cases where we want to test multiple instructions where
we can do optimizations that would overwise be hard to see.
eg:
```asm
; Can be optimized to a single stp
push eax
push ebx
; Can remove half of the copy since we know the direction
cld
rep movsb
; Can remove a redundant insert
addss xmm0, xmm1
addss xmm0, xmm2
```
This lets us have arbitrary sized code in instruction count CI, with the
original json key becoming only a label if the instruction array is
provided.
There are still some major limitations to this, instructions that
generate side-effects might have "garbage" after the end of the block
that isn't correctly accounted for. So care must be taken.
Example in the json
```json
"push ax, bx": {
"ExpectedInstructionCount": 4,
"Optimal": "No",
"Comment": "0x50",
"x86Insts": [
"push ax",
"push bx"
],
"ExpectedArm64ASM": [
"uxth w20, w4",
"strh w20, [x8, #-2]!",
"uxth w20, w7",
"strh w20, [x8, #-2]!"
]
}
```