swift-mirror/test/SILOptimizer/Inputs/objc_bridging_opt/objc.h at jgrynspan/executablePath - swift-mirror - Gitea: Git with a cup of tea

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Erik Eckstein ec3d9dd9c7 Optimizer: add the ObjCBridgingOptimization to optimize ObjectiveC bridging operations.

Removes redundant ObjectiveC <-> Swift bridging calls.
Basically, if a value is bridged from ObjectiveC to Swift an then back to ObjectiveC again, then just re-use the original ObjectiveC value.

Also in this commit: add an additional DCE pass before ownership elimination. It can cleanup dead code which is left behind by the ObjCBridgingOptimization.

rdar://89987440

2022-06-08 22:51:57 +02:00

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 #include <Foundation/NSString.h>
 void useNSString(NSString  * _Nonnull s);
 void useOptNSString(NSString  * _Nullable s);
 NSString * _Nonnull returnNSString();
 NSString * _Nullable returnOptNSString(BOOL some);
 NSString * _Nonnull returnNullNSString();