Fix 'Fix [turbofan] Prevent storing signalling NaNs into holey double arrays.'
Port 52f2ceb0 Original commit message: On MIPS different signaling NaN values must be used for hardware and simulator targets, even at snapshot generation when always simulator is used. This introduces SilenceNaN operator, which makes sure that we only store quiet NaNs into holey arrays. We omit the NaN silencing code at instruction selection time if the input is an operation that cannot possibly produce signalling NaNs. BUG= TEST=mjsunit/compiler/regress-store-holey-double-array Review-Url: https://codereview.chromium.org/2188433002 Cr-Commit-Position: refs/heads/master@{#38090}
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