The Swift Simplification pass can do more than the old MandatoryCombine pass: simplification of more instruction types and dead code elimination.
The result is a better -Onone performance while still keeping debug info consistent.
Currently following code patterns are simplified:
* `struct` -> `struct_extract`
* `enum` -> `unchecked_enum_data`
* `partial_apply` -> `apply`
* `br` to a 1:1 related block
* `cond_br` with a constant condition
* `isConcrete` and `is_same_metadata` builtins
More simplifications can be added in the future.
rdar://96708429
rdar://104562580
Add more relevant instructions to dump in MemBehaviorDumper.
Therefore the -enable-mem-behavior-dump-all option can be removed.
Also mem-behavior-all.sil into mem-behavior.sil, because the sil-opt command lines don't differ anymore.
* rename -sil-print-only-function to -sil-print-function and -sil-print-only-functions to -sil-print-functions
* to print single functions, don't require -Xllvm -sil-print-all. It's now sufficient to use e.g. -Xllvm -sil-print-function=<f>
But it's still possible to select functions with -sil-print-function(s) for other print options, -sil-print-after.
And fix a test case that assumes Array.append is never inlined.
We need to be able to prevent inlining a function and any of its
specializations. There's no way to specify multiple function names on
the command line, so we use the partial match technique.
