NEW 169248
BitAnd(Load8Z|Load16Z, $imm) should know that it doesn't need to encode high bits in $imm 
https://bugs.webkit.org/show_bug.cgi?id=169248
Summary BitAnd(Load8Z|Load16Z, $imm) should know that it doesn't need to encode high ...
Filip Pizlo
Reported 2017-03-06 19:49:20 PST
This is one of those "we'll probably never do it because it's not profitable" optimizations.
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