X87: Revert of [turbofan] Improve codegen for 8- and 16-bit memory comparisons...
X87: Revert of [turbofan] Improve codegen for 8- and 16-bit memory comparisons on Intel platforms (patchset #3 id:40001 of https://codereview.chromium.org/2605863002/ ). port c16ca32e (r42092) original commit message: Reason for revert: Breaks wasm benchmark (http://crbug.com/v8/5798). Original issue's description: > [turbofan] Improve codegen for 8- and 16-bit memory comparisons on Intel platforms > > Recognize and emit in-memory comparisons of 8-bit and 16-bit values with > immediate values that fit. > > LOG=N > R=epertoso@chromium.org > > Review-Url: https://codereview.chromium.org/2605863002 > Cr-Commit-Position: refs/heads/master@{#41971} > Committed: https://chromium.googlesource.com/v8/v8/+/be11812c53ff6c8ce320887bc76a3b60d8103695 BUG= Review-Url: https://codereview.chromium.org/2622463002 Cr-Commit-Position: refs/heads/master@{#42126}
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