Erik Eckstein d25b1ed834 Optimizer: Replace the MandatoryCombine pass with a Simplification pass, which is implemented in Swift ...

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

2023-02-09 06:50:05 +01:00

6.5 KiB

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