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    • ahaas's avatar
      [wasm] Fix constant folding with signalling NaN. · 55aed782
      ahaas authored
      According to the WebAssembly spec no arithmetic operation should ever
      return a signalling NaN. With the constant folding in V8, however, it
      was possible that some arithmetic operations were elided, and if the
      input of the arithmetic operation was a signalling NaN, then also the
      result was the same signalling NaN. This CL removes some constant
      folding optimizations and adjusts others so that even with constant
      folding the result of an arithmetic operation is never a signalling NaN.
      
      R=titzer@chromium.org, rossberg@chromium.org, bmeurer@chromium.org
      
      Review-Url: https://codereview.chromium.org/2647353007
      Cr-Commit-Position: refs/heads/master@{#42694}
      55aed782