Clean up VarHandles.set*() for arrays and byte array views.

This CL is a clean up for https://r.android.com/1875684. Changes:

- Use setters instead of constructor arguments.

- Rerun benchmarks and add improvements for arrays to commit message
  (as aosp/1875684 forgot to mention changes for arrays).

- Do BSWAP at compile time if the argument is a constant value.
  `HandleFieldSet` now can optionally perform byte swap. The function
  is rewritten so that constant and non-constant values are handled in
  separate branches, which makes both cases simpler.

- Add helper function `CodeGeneratorX86_64::GetInstructionCodegen` to
  reduce boilerplate.

Benchmarks improvements (using benchmarks provided by
https://android-review.googlesource.com/1420959):

  benchmark                             before aosp/1875684   now
  ----------------------------------------------------------------
  VarHandleSetArrayElementInt                   2.79         0.002
  VarHandleSetArrayElementString                3.09         0.003
  VarHandleSetByteArrayViewInt                  2.89         0.004
  VarHandleSetByteArrayViewBigEndianInt         2.89         0.004

Bug: 71781600
Test: lunch aosp_cf_x86_64_phone-userdebug \
  && art/test.py --host -r -t 712-varhandle-invocations --64
Test: Repeat with ART_USE_READ_BARRIER=false.
Test: Repeat with ART_HEAP_POISONING=true.
Change-Id: I8cc37321228ffb2833a1158a75ced65f18af968e

0 files changed, 0 insertions, 0 deletions