Erik Eckstein 8fe36eedd8 SILPassManager: improve bisecting for debugging the optimizer ...

* Add the possibility to bisect the individual transforms of SILCombine and SimplifyCFG.
   To do so, the `-sil-opt-pass-count` option now accepts the format `<n>.<m>`, where `m` is the sub-pass number.
   The sub-pass number limits the number of individual transforms in SILCombine or SimplifyCFG.

* Add an option `-sil-print-last` to print the SIL of the currently optimized function before and after the last pass, which is specified with `-sil-opt-pass-count`.

2022-02-09 13:25:30 +01:00

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