Attachment: Download

is blocked by:

• SR-6800 Swift 4.1 regression: compiler crash with optimizations (instrprof failed to lower an increment UNREACHABLE executed)

Issue Description:

Swift 4.1 compiler will crash the project using Carthage module.

1. set optimization for speed [-O]

2. import Carthage module

3. Subclassing Carthage module's class

4. override the method and change return type to internal type.

I add sample project.

That includes APIKit added by Carthage and MySession class in AppDelegate.swift is problematic class.

<unknown>:0: error: fatal error encountered during compilation; please file a bug report with your project and the crash log
0  swift                    0x0000000109b6078a PrintStackTraceSignalHandler(void*) + 42
1  swift                    0x0000000109b5fb46 SignalHandler(int) + 966
2  libsystem_platform.dylib 0x00007fff7f4f3f5a _sigtramp + 26
3  libsystem_platform.dylib 0x00007ffee9ab3538 _sigtramp + 1784411640
4  swift                    0x0000000106f14203 swift::PrintingDiagnosticConsumer::handleDiagnostic(swift::SourceManager&, swift::SourceLoc, swift::DiagnosticKind, llvm::StringRef, llvm::ArrayRef<swift::DiagnosticArgument>, swift::DiagnosticInfo const&) + 1203
5  swift                    0x00000001061be25f swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*)::$0::invoke(void*, std::1::basic_string<char, std::1::char_traits<char>, std::_1::allocator<char> > const&, bool) + 351
6  swift                    0x0000000109b17dc8 llvm::report_fatal_error(llvm::Twine const&, bool) + 280
7  swift                    0x0000000109b17e5f llvm::report_fatal_error(std::_1::basic_string<char, std::1::char_traits<char>, std::_1::allocator<char> > const&, bool) + 31
8  swift                    0x0000000107e82160 llvm::SelectionDAGISel::SelectCodeCommon(llvm::SDNode*, unsigned char const*, unsigned int) + 21120
9  swift                    0x00000001076fa025 (anonymous namespace)::X86DAGToDAGISel::Select(llvm::SDNode*) + 3045
10 swift                    0x0000000107e77ae9 llvm::SelectionDAGISel::CodeGenAndEmitDAG() + 3161
11 swift                    0x0000000107e74afe llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) + 17358
12 swift                    0x0000000107e6f81d llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) + 2461
13 swift                    0x00000001076f7fa4 (anonymous namespace)::X86DAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&) + 20
14 swift                    0x0000000108284436 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) + 134
15 swift                    0x0000000109a87d11 llvm::FPPassManager::runOnFunction(llvm::Function&) + 449
16 swift                    0x0000000109a87953 llvm::FPPassManager::runOnModule(llvm::Module&) + 67
17 swift                    0x0000000109a91328 llvm::legacy::PassManager::run(llvm::Module&) + 1112
18 swift                    0x00000001063676b1 swift::performLLVM(swift::IRGenOptions&, swift::DiagnosticEngine*, llvm::sys::SmartMutex<false>, llvm::GlobalVariable, llvm::Module*, llvm::TargetMachine*, swift::version::Version const&, llvm::StringRef, swift::UnifiedStatsReporter*) + 7409
19 swift                    0x00000001061c919d performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) + 44685
20 swift                    0x00000001061bc894 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 7908
21 swift                    0x00000001061712c5 main + 18917
22 libdyld.dylib            0x00007fff7f272115 start + 1
23 libdyld.dylib            0x0000000000000041 start + 2161696557