[hls-fuzzer] Add termination type system#1007
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A common choice in (currently all) targets is to only generate terminating programs. This requires a few tricks especially in handling for loops such as limiting ranges and also limiting loop variable assignments. This PR therefore introduces a new `TerminationTypeSystem` that can just be combined into any other type system to generate terminating programs. Internally it reuses the bitwidth type system for limiting the ranges of the iter, start and end values of a structured-for loop (as was previously done manually in random-c and the bitwidth type system, but is now reused) and additionally blocks the iter variables of a for loop from ever being assigned to.
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A common choice in (currently all) targets is to only generate terminating programs. This requires a few tricks especially in handling for loops such as limiting ranges and also limiting loop variable assignments.
This PR therefore introduces a new
TerminationTypeSystemthat can just be combined into any other type system to generate terminating programs. Internally it reuses the bitwidth type system for limiting the ranges of the iter, start and end values of a structured-for loop (as was previously done manually in random-c and the bitwidth type system, but is now reused) and additionally blocks the iter variables of a for loop from ever being assigned to.Alternative to #990