Warning: This is an area of ongoing development and documentation gets easily outdated!

What is HLT?

High Level Transformations (from now HLT) are a set of common source transformations that are both available for compiler phase developers and for casual users of Mercurium. At developer level these transformations aim at reducing code replication for some common processes performed when transforming code. At user level their goal is reducing program maintenance issues because of code reshaping.

Pragma interface

Mercurium users have available a #pragma hlt interface to benefit of HLT transformations. In order to enable HLT processing it is mandatory to pass --hlt option in the command line. Remember that you can add --hlt in your options line in configuration file in case you want a profile to have --hlt always enabled.

Available transformations

There are basically two sets of available transformations, each documented in its section, loop transformations and function-related transformations.