• Milad Fa's avatar
    PPC/s390: [liftoff] Push the instance as part of frame construction · 24d92be5
    Milad Fa authored
    Port 593fbb69
    
    Original Commit Message:
    
        Currently we first construct the frame (via
        {TurboAssembler::EnterFrame}), then we spill the instance to the
        respective slot (via {LiftoffAssembler::SpillInstance}). Instead, we
        should already spill the instance as part of frame construction. That
        allows for a more compact instruction to be used ("push" instead of
        "mov" on Intel), and on arm64 even allows to merge pushing into an
        existing instruction (where we currently push the zero register x31
        instead).
    
        This makes the prologue more similar to what TurboFan generates in
        {TurboAssembler::AssembleConstructFrame} (which does not use
        {TurboAssembler::EnterFrame}).
    
    R=clemensb@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
    BUG=
    LOG=N
    
    Change-Id: I0b87d73776b59ade36faea2f4772c63c89eb740e
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3056455Reviewed-by: 's avatarJunliang Yan <junyan@redhat.com>
    Commit-Queue: Milad Fa <mfarazma@redhat.com>
    Cr-Commit-Position: refs/heads/master@{#75942}
    24d92be5
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