[MERGE #5664 @nhat-nguyen] Force same src/dst for SQRTSD
[MERGE #5664 @nhat-nguyen] Force same src/dst for SQRTSD

Merge pull request #5664 from nhat-nguyen:sqrtsd

 Force source to be the same as destination to break false dependency on the register; this fixes the slowdown for `sqrtsd`

Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore