[SR-14963] [C++-Interop] fatal llvm::Error when using operator+ on CGPoint with ObjC & C++ Interop enabled

[swift-ci]

Previous ID	SR-14963
Radar	rdar://problem/83361944
Original Reporter	plotfi (JIRA User)
Type	Sub-task

Additional Detail from JIRA

Votes	0
Component/s
Labels	Sub-task, CxxInterop
Assignee	None
Priority	Medium

md5: 627f57800f88fbd2925717c088588376

Parent-Task:

• [SR-14962] ☂️ C++-Interop Component Kit Umbrella Bugs #57304

Issue Description:

This one is fairly strange since I have not been able to reproduce it without importing UIKit. The following fails in swift::ModuleFile::loadAllConformances with a fatal llvm::Error.

import UIKit
let Point1 = CGPoint()
let Point2 = Point1 + Point1

But if I were to extract some minimal Objective-C++ and put it in my own Module (Call it MyMinUIKit):

// Module MyMinUIKit
typedef double CGFloat;
struct CGPoint { CGFloat x; CGFloat y; };
typedef struct __attribute__((objc_boxable)) CGPoint CGPoint; 

and import MyMinUIKit instead of UIKit, then the above Swift would result in a normal compile error that tells that there is no operator+ in CGPoint:

error: binary operator '+' cannot be applied to two 'CGPoint' operands
let Point2 = Point1 + Point1
             ~~~~~~ ^ ~~~~~~

The command line to run this was:

swift -frontend -S -emit-ir -disable-implicit-concurrency-module-import \
    -enable-cxx-interop -enable-objc-interop \
    -target arm64-apple-ios14.5 -target-sdk-version 14.5 \
    -sdk /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.5.sdk \
    main.swift

[zoecarver]

@swift-ci create