Revert "[runtime] Optimise paired instance type checks"
This reverts commit 92edf9a1. Reason for revert: Breaks mjsunit/es6/proxies-json on GCStress https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/39619/overview Original change's description: > [runtime] Optimise paired instance type checks > > Clang doesn't optimise over handle derefs. Change the ValueSerializer > and the JsonStringifier to use InstanceType directly for checks. > This CL squeezes another 1.5% of JSON.stringify in local benchmarks. > > Drive-by-fix: > - Avoid a few more derefs in the JsonStringifier > - Make JsonStringifier::SerializeJSArray a bit more readable > > Change-Id: I37626a6d92a8d9275611a4e6d1d908f2e0c6d43b > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3247637 > Commit-Queue: Camillo Bruni <cbruni@chromium.org> > Reviewed-by: Toon Verwaest <verwaest@chromium.org> > Cr-Commit-Position: refs/heads/main@{#77697} Change-Id: I127dd5832b9caceb0d5b74631eede274551405e0 No-Presubmit: true No-Tree-Checks: true No-Try: true Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3260511 Auto-Submit: Leszek Swirski <leszeks@chromium.org> Owners-Override: Leszek Swirski <leszeks@chromium.org> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com> Commit-Queue: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/main@{#77700}
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