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    • mbrandy's avatar
      PPC: [turbofan] Don't use the CompareIC in JSGenericLowering. · c1507e15
      mbrandy authored
      Port d00da47b
      
      Original commit message:
          The CompareICStub produces an untagged raw word value, which has to be
          translated to true or false manually in the TurboFan code. But for lazy
          bailout after the CompareIC, we immediately go back to fullcodegen or
          Ignition with the raw value, to a location where both fullcodegen and
          Ignition expect a boolean value, which might crash or in the worst case
          (depending on the exact computation inside the CompareIC) could lead to
          arbitrary memory access.
      
          Short-term fix is to use the proper runtime functions (unified with the
          interpreter now) for comparisons. Next task is to provide optimized
          versions of these based on the CodeStubAssembler, which can then be used
          via code stubs in TurboFan or directly in handlers in the interpreter.
      
      R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
      BUG=v8:4788
      LOG=n
      
      Review URL: https://codereview.chromium.org/1745643002
      
      Cr-Commit-Position: refs/heads/master@{#34341}
      c1507e15