• jyan's avatar
    S390: [Interpreter] Make dispatch table point to code entry instead of code objects. · af4e2142
    jyan authored
    Port 0c05e02f
    
    Original commit message:
        Modifies Ignition to store code entry addresses in the dispatch table
        rather than code objects. This allows the interpreter to avoid
        calculating the code entry address from the code object on every
        dispatch and provides a ~5-7% performance improvement on Octane with
        Ignition.
    
        This change adds ArchOpcode::kArchTailCallAddress to TurboFan to enable
        tail call dispatch using these code addresses. It also adds a Dispatch
        linkage creator (distinct from the stub linkage type used previously) to
        allow targetting a code address target (which will diverge further from
        the stub linkage type when we remove the context machine register in
        Ignition).
    
    R=rmcilroy@chromium.org, joransiu@ca.ibm.com, mbrandy@us.ibm.com, michael_dawson@ca.ibm.com, bjaideep@ca.ibm.com
    BUG=v8:4280
    LOG=N
    
    Review URL: https://codereview.chromium.org/1887263003
    
    Cr-Commit-Position: refs/heads/master@{#35533}
    af4e2142
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