Automatically adding ccs based on suspected regression changelists:

[turbofan][x64] Reduce compare-zero followed by flags-setting binop by kanghua.yu@intel.com - https://chromium.googlesource.com/v8/v8/+/423343635042c2d9b05a850ebc1d2fc3fc9cc4f5

If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label.

The following revision refers to this bug:
  https://chromium.googlesource.com/v8/v8.git/+/3302242667ee30537f9389a4e395f1f5cfa41648

commit 3302242667ee30537f9389a4e395f1f5cfa41648
Author: Kanghua Yu <kanghua.yu@intel.com>
Date: Tue May 15 06:40:13 2018

Reland "[turbofan][x64] Reduce compare-zero followed by flags-setting binop"

On IA architecture, arithmetic and shifting operations set the flags
according to the computation result.

    subl rsi,0x1
    REX.W movq rbx,[rbx+0x17]
    cmpl rsi, 0                       <-- TO BE REDUCED
    jnz 0x3f54d2dcef0
==>
    REX.W movq rbx,[rbx+0x17]
    subl rsi,0x1
    jnz 0x3f54d2dcef0
&
    orl rdx,rbx
    cmpl rdx,0x0                      <-- TO BE REDUCED
    jnz 0x3f54d22b0f5
==>
    orl rdx,rbx
    jnz 0x3f54d22b0f5

Bug:  chromium:842497 ,  chromium:842501 
Change-Id: I4e2c40861b76ac3f508b01ee27249e85eab3222f
Reviewed-on: https://chromium-review.googlesource.com/1057351
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Kanghua Yu <kanghua.yu@intel.com>
Cr-Commit-Position: refs/heads/master@{#53171}
[modify] https://crrev.com/3302242667ee30537f9389a4e395f1f5cfa41648/src/compiler/x64/instruction-selector-x64.cc
[modify] https://crrev.com/3302242667ee30537f9389a4e395f1f5cfa41648/test/cctest/compiler/test-run-machops.cc

ClusterFuzz has detected this issue as fixed in range 53136:53137.

Detailed report: https://clusterfuzz.com/testcase?key=6317430343991296

Fuzzer: mbarbella_js_mutation
Job Type: linux_ubsan_vptr_d8
Platform Id: linux

Crash Type: Floating-point-exception
Crash Address: 
Crash State:
  NULL
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_d8&range=53117:53118
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_d8&range=53136:53137

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6317430343991296

See https://github.com/google/clusterfuzz-tools for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

ClusterFuzz testcase 6317430343991296 is verified as fixed, so closing issue as verified.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.