FFT8 doesn't pass memory mapper

[kosho2013]

@joyliu37
FFT8 doesn't pass memory mapper.

unroll0:
clockwork: ubuffer.cpp:4343: bank UBuffer::compute_bank_info(uset*, isl_point*, std::set<std::__cxx11::basic_string >, std::set<std::__cxx11::basic_string >): Assertion `false' failed.

unroll2:
clockwork: prog.cpp:7505: isl_map* build_buffer_impl(prog&, UBuffer&, schedule_info&, ubuffer_impl&): Assertion `has_embarassing_partition' failed.

unroll4:
clockwork: prog.cpp:7505: isl_map* build_buffer_impl(prog&, UBuffer&, schedule_info&, ubuffer_impl&): Assertion `has_embarassing_partition' failed.

unroll8:
clockwork: ubuffer.cpp:4343: bank UBuffer::compute_bank_info(uset*, isl_point*, std::set<std::__cxx11::basic_string >, std::set<std::__cxx11::basic_string >): Assertion `false' failed.

[joyliu37]

This is supposed to be a banking issue.
Which branch are you in and what's the command to reproduce this issue?

[kosho2013]

My branch is called "kosho".
The command is "./rebuild_and_run.sh lake-exp".
You can modify the apps in "build_set_test.cpp" to experiment with different unrolling schemes.