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IRGen: EmptyBoxType's representation cannot be nil because of a conflict with extra inhabitant assumption in indirect enums (#10326)

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* IRGen: EmptyBoxType's representation cannot be nil because of a conflict with extra inhabitant assumption in indirect enums

We map nil to the .None case of Optional. Instead use a singleton object.

SR-5148
rdar://32618580
This commit is contained in:
Arnold Schwaighofer
2017-06-17 09:33:41 -07:00
committed by GitHub
parent 6f3b8ca60f
commit 48e889b51b
13 changed files with 113 additions and 5 deletions
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14
lib/IRGen/IRGenFunction.cpp
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@@ -209,6 +209,20 @@ llvm::Value *IRGenFunction::emitProjectBoxCall(llvm::Value *box,
return call;
}
llvm::Value *IRGenFunction::emitAllocEmptyBoxCall() {
llvm::Attribute::AttrKind attrKinds[] = {
llvm::Attribute::NoUnwind,
};
auto attrs = llvm::AttributeSet::get(IGM.LLVMContext,
llvm::AttributeSet::FunctionIndex,
attrKinds);
llvm::CallInst *call =
Builder.CreateCall(IGM.getAllocEmptyBoxFn(), {});
call->setCallingConv(IGM.DefaultCC);
call->setAttributes(attrs);
return call;
}
static void emitDeallocatingCall(IRGenFunction &IGF, llvm::Constant *fn,
std::initializer_list<llvm::Value *> args) {
auto cc = IGF.IGM.DefaultCC;