Address irgen::emitAddressOfClassFieldOffset(IRGenFunction &IGF,
llvm::Value *metadata,
ClassDecl *theClass,
VarDecl *field) {
auto offset =
IGF.IGM.getClassMetadataLayout(theClass).getFieldOffset(IGF, field);
auto slot = IGF.emitAddressAtOffset(metadata, offset, IGF.IGM.SizeTy,
IGF.IGM.getPointerAlignment());
return slot;
}
Address irgen::emitAddressOfFieldOffsetVector(IRGenFunction &IGF,
llvm::Value *metadata,
NominalTypeDecl *decl) {
auto &layout = IGF.IGM.getMetadataLayout(decl);
auto offset = [&]() {
if (isa<ClassDecl>(decl)) {
return cast<ClassMetadataLayout>(layout)
.getFieldOffsetVectorOffset(IGF);
} else {
assert(isa<StructDecl>(decl));
return cast<StructMetadataLayout>(layout)
.getFieldOffsetVectorOffset();
}
}();
auto *elementSize = IGF.IGM.SizeTy;
if (isa<StructDecl>(decl))
elementSize = IGF.IGM.Int32Ty;
return IGF.emitAddressAtOffset(metadata, offset, elementSize,
IGF.IGM.getPointerAlignment());
}