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authorBjörn Gustavsson <[email protected]>2014-12-31 11:11:57 +0100
committerBjörn Gustavsson <[email protected]>2015-03-09 09:59:37 +0100
commite914206e11b439a5794b7a8c3c527af395609ddd (patch)
tree7d790e2af9194479b42a753e453a00b92086ef93 /lib/compiler/test/receive_SUITE_data
parent4f365a9b80bab48c4478a6910624244f88637bcb (diff)
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sys_core_fold: Improve optimization of 'not'
Optimize away 'not' in sys_core_fold instead of in beam_block and beam_dead, as we can do a better job in sys_core_fold. I modified the test suite temporarily to never turn off Core Erlang modifications and looked at the coverage. With the new optimizations active in sys_core_fold, the code in beam_block and beam_dead did not find a single 'not' that it could optimize. That proves that the new optimization is at least as good as the old one. Manually, I could also verify that the new optimization would optimize some variations of 'not' that the old one would not handle.
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