[llvm] [AArch64] Optimize when storing symmetry constants (PR #93717)

[via llvm-commits]

ParkHanbum wrote:

I got the pass in test-suite again. 
in changed environment from MacOSX to Linux with docker. 

```
/work/llvm/build-linux/test-suite-build/../../test-suite/utils/compare.py:206: FutureWarning: Series.__getitem__ treating keys as positions is deprecated. In a future version, integer keys will always be treated as labels (consistent with DataFrame behavior). To access a value by position, use `ser.iloc[pos]`
  name0 = names[0]
Program                                       exec_time 
                                              results   
LoopVector...meChecks4PointersDBeforeA/1000   1747554.95
LoopVector...imeChecks4PointersDAfterA/1000    394555.76
LoopVector...meChecks4PointersDEqualsA/1000    391361.31
LoopVector...tersAllDisjointIncreasing/1000    389818.10
LoopVector...tersAllDisjointDecreasing/1000    387404.53
LCALS/Subs...test:BM_MAT_X_MAT_LAMBDA/44217    200970.88
LCALS/Subs...aw.test:BM_MAT_X_MAT_RAW/44217    185668.65
harris/har...est:BENCHMARK_HARRIS/2048/2048     72338.17
ImageProce...t:BENCHMARK_GAUSSIAN_BLUR/1024     37052.50
LoopVector...timeChecks4PointersDBeforeA/32     33376.06
LoopVector...LoopFrom_uint64_t_To_uint32_t_     22920.46
LoopVector...VW16From_uint64_t_To_uint32_t_     20571.81
LoopVector...hVW8From_uint64_t_To_uint32_t_     19181.25
LoopVector...hVW16From_uint64_t_To_uint8_t_     17468.18
LoopVector...LoopFrom_uint64_t_To_uint16_t_     17304.87
          exec_time
run         results
count  4.260000e+03
mean   1.104730e+03
std    2.967942e+04
min    0.000000e+00
25%    4.000000e-04
50%    1.360000e-02
75%    9.477289e-02
max    1.747555e+06

root at 6edef4f7cbda:/work/llvm/build-linux/test-suite-build# uname -a
Linux 6edef4f7cbda 6.4.16-linuxkit #1 SMP PREEMPT Thu Nov 16 10:49:20 UTC 2023 aarch64 aarch64 aarch64 GNU/Linux
```

@davemgreen please let me know still problem occur.

https://github.com/llvm/llvm-project/pull/93717