Revert "Compiler"

This reverts commit 089143e537798d67b9377a0b9a6ba05efeea636f.
Revert "Revert "Compiler""

This reverts commit 4f15b0b851bb7d74f02a6827af6ce722a0a6621a.
Revert "Revert "Revert "Compiler"""

This reverts commit a16a127842bd8112648b0fab8171c0ae15a3c906.
Revert "chi2logit"

This reverts commit abfe58f0166824771b924722c2ce0a62f383e37f.