• plind44@gmail.com's avatar
    MIPS: Avoid flushing the icache unnecessarily when updating target addresses in code. · eabf0602
    plind44@gmail.com authored
    Port r21380 (ef20a0a)
    
    Original commit message:
    This CL updates RelocInfo update operations and set_target_address_at to enable
    skipping of the icache flush if it going to be batched up later.
    Code::CopyFrom and Code::Relocate are modified to avoid individual icache
    flushes since the whole code area will be flushed after the reloc info is
    updated.
    
    These changes reduce a regression when enabling the OOL constant pool on Arm,
    since this change can cause MovT/MovW instructions for relocatable targets
    if the constant pool is full.
    
    Scores for Mandreel latency on a Nexus 5:
    - OOL CP disabled: 3533
    - OOL CP enabled, without this CL: 1825
    - OOL CP enabled, with change: 3015
    
    BUG=
    R=plind44@gmail.com
    
    Review URL: https://codereview.chromium.org/296723003
    
    Patch from Balazs Kilvady <kilvadyb@homejinni.com>.
    
    git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21390 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
    eabf0602
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