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bmeurer authored
A diamond is unused if the Merge node has no Phi/EffectPhi uses, exactly two inputs, one IfTrue and one IfFalse, which have the same Branch control input and no other uses except for the Merge. In this case the diamond can safely be removed. R=jarin@chromium.org Review URL: https://codereview.chromium.org/1000883003 Cr-Commit-Position: refs/heads/master@{#27148}
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