Kuba (Brecka) Mracek 5412ed1936 Implement LLVM IR Virtual Function Elimination for Swift classes. (#39128) ...

- Virtual calls are done via a @llvm.type.checked.load instrinsic call with a type identifier
- Type identifier of a vfunc is the base method's mangling
- Type descriptors and class metadata get !type markers that list offsets and type identifiers of all vfuncs
- The -enable-llvm-vfe frontend flag enables VFE
- Two added tests verify the behavior on IR and by executing a program

2021-09-14 06:59:07 -07:00

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