Loopification breaks profiling

Profiling is currently broken in HEAD. Setting BuildFlavour = prof in build.mk leads to a segfault during build. After reverting d61c3ac1 (loopification performed in the code generator) everything builds without problems.

I am going to lower the priority since loopification is now no longer by default, and it looks like loopification by default will not make it to GHC 7.8.

Edited Mar 09, 2019 by Edward Z. Yang

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Loopification breaks profiling