• bmeurer's avatar
    Revert of [turbofan] Remove redundant code. (patchset #1 id:1 of... · 5f4828a1
    bmeurer authored
    Revert of [turbofan] Remove redundant code. (patchset #1 id:1 of https://codereview.chromium.org/1428943004/ )
    
    Reason for revert:
    This CL reintroduces all kinds of funny moves for Merges of deferred code, which makes jump threading ineffective.
    
    Original issue's description:
    > [turbofan] Remove redundant code.
    >
    > When I centralized the treatment of memory operands, I forgot to delete
    > the old code.
    >
    > There is a semantic difference between the old and new code. The old
    > code was handling either memory operands, or ranges that had a spilled
    > predecessor. The new code handles just memory operands. It may
    > happen that (using LinearScan) an active range is spilled when trying
    > to allocate another range (see SplitAndSpillIntersecting). That may make
    > it a candidate for the old version of the code, however, since we would
    > have spilled up to a register use, the old code wouldn't have had taken
    > effect.
    >
    > Perf data shows this nuance doesn't make a difference in perf.
    >
    > BUG=
    >
    > Committed: https://crrev.com/c03d7a7f03657a452f71277d84e435ed73566327
    > Cr-Commit-Position: refs/heads/master@{#31729}
    
    TBR=jarin@chromium.org,mtrofin@chromium.org
    NOPRESUBMIT=true
    NOTREECHECKS=true
    NOTRY=true
    BUG=
    
    Review URL: https://codereview.chromium.org/1416293004
    
    Cr-Commit-Position: refs/heads/master@{#31732}
    5f4828a1
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