• Milad Fa's avatar
    s390: [sparkplug] Use separate WriteBarrier stubs · 5b48a13a
    Milad Fa authored
    Port 2a43f8c4
    
    Original Commit Message:
    
        Inline the RememberedSetAction and SaveFPMode flags directly into the
        RecordWrite stubs:
        - Save two register for input arguments
        - Avoid branches in the RecordWrite stubs
    
        We end up with 2 stubs for the EphemeronKeyBarrier and 4 stubs for
        RecordWrite. Due to more inlined calls we have roughly 1KiB more
        builtins code for RecordWrite currently. We will address this in the
        future by splitting out common code into a separate stub. There is
        no additional code size overhead for EphemeronKeyBarrier.
    
        This saves 4 to 8 bytes on x64 per RecordWrite call and 2.5% sparkplug
        code size reduction on d3.min.js.
    
    R=cbruni@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
    BUG=
    LOG=N
    
    Change-Id: Iaab3d0aad9f90a942459ac63a641c52246a4afa1
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2906012Reviewed-by: 's avatarJunliang Yan <junyan@redhat.com>
    Commit-Queue: Milad Fa <mfarazma@redhat.com>
    Cr-Commit-Position: refs/heads/master@{#74674}
    5b48a13a
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