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bmeurer authored
Revert of [turbofan] Constant propagation for JumpIfFalse/JumpIfTrue. (patchset #4 id:60001 of https://codereview.chromium.org/2666283002/ ) Reason for revert: Breaks win64 it seems. Original issue's description: > [turbofan] Constant propagation for JumpIfFalse/JumpIfTrue. > > The JumpIfFalse and JumpIfTrue bytecodes test the accumulator, and > branch based on whether the accumulator is true or false (no other > value allowed, and in fact TurboFan would blow up if you would pass > anything else, since Branch operator can only deal with Boolean). > So for either branch we know exactly the value of the accumulator, > and we can update the environment to this constant value instead. > > This helps to avoid the useless bit materialization that currently > happens when || or && is being used in a value context. > > R=jarin@chromium.org > BUG=v8:5267 > > Review-Url: https://codereview.chromium.org/2666283002 > Cr-Commit-Position: refs/heads/master@{#42843} > Committed: https://chromium.googlesource.com/v8/v8/+/158ac9287193f315342ad31c38fe451620d176eb TBR=jarin@chromium.org # Skipping CQ checks because original CL landed less than 1 days ago. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG=v8:5267 Review-Url: https://codereview.chromium.org/2668933002 Cr-Commit-Position: refs/heads/master@{#42845}
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