Issue Description:

The following code snippet causes the compiler to crash:

func getLabeledTuple() -> (label1: [Bool]?, label2: [Bool]?) {
    return (label1: nil, label2: nil)
}

func decomposeLabeledTuple() -> Int? {
    let (label1, label2) = getLabeledTuple()
    guard let label1 = label1, let label2 = label2 else {
        return nil
    }
    return nil
}

Command:

swiftc test.swift -o test

Stack Trace:

Stored value type does not match pointer operand type!

store %swift.bridge* %17, i64* %1, align 8

i64Stored value type does not match pointer operand type!

store %swift.bridge* %25, i64* %4, align 8

i64in function $s4test21decomposeLabeledTupleSiSgyF

<unknown>:0: error: fatal error encountered during compilation; please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project

<unknown>:0: note: Broken function found, compilation aborted!

Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project and the crash backtrace.

Stack dump:

0. Program arguments: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -c -primary-file test.swift -target arm64-apple-darwin20.5.0 -Xllvm -aarch64-use-tbi -enable-objc-interop -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.3.sdk -color-diagnostics -target-sdk-version 11.3 -module-name test -o /var/folders/b3/mxpqyntn0rqg9vcq1xv1p42w0000gn/T/test-b00f98.o

1. Apple Swift version 5.4.2 (swiftlang-1205.0.28.2 clang-1205.0.19.57)

2. Running pass 'Module Verifier' on function '@"$s4test21decomposeLabeledTupleSiSgyF"'

0 swift-frontend 0x0000000104fac6e0 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 52

1 swift-frontend 0x0000000104fab858 llvm::sys::RunSignalHandlers() + 128

2 swift-frontend 0x0000000104faccb0 SignalHandler(int) + 292

3 libsystem_platform.dylib 0x000000019cff6c44 _sigtramp + 56

4 libsystem_pthread.dylib 0x000000019cfab43c pthread_kill + 292

5 libsystem_c.dylib 0x000000019cef3460 abort + 104

6 swift-frontend 0x0000000100eedd28 std::_1::_throw_length_error(char const*) + 0

7 swift-frontend 0x0000000104f198c8 llvm::report_fatal_error(llvm::Twine const&, bool) + 252

8 swift-frontend 0x0000000104f197cc llvm::report_fatal_error(llvm::Twine const&, bool) + 0

9 swift-frontend 0x0000000104ec3ef0 void llvm::VerifierSupport::CheckFailed<llvm::Instruction*, llvm::MDNode const*>(llvm::Twine const&, llvm::Instruction* const&, llvm::MDNode const* const&) + 0

10 swift-frontend 0x0000000104e688c8 llvm::FPPassManager::runOnFunction(llvm::Function&) + 1136

11 swift-frontend 0x0000000104e67e80 llvm::legacy::FunctionPassManagerImpl::run(llvm::Function&) + 96

12 swift-frontend 0x0000000104e6e4f8 llvm::legacy::FunctionPassManager::run(llvm::Function&) + 336

13 swift-frontend 0x000000010120230c swift::performLLVMOptimizations(swift::IRGenOptions const&, llvm::Module*, llvm::TargetMachine*) + 1484

14 swift-frontend 0x0000000101203228 swift::performLLVM(swift::IRGenOptions const&, swift::DiagnosticEngine&, llvm::sys::SmartMutex<false>, llvm::GlobalVariable, llvm::Module*, llvm::TargetMachine*, llvm::StringRef, swift::UnifiedStatsReporter*) + 2464

15 swift-frontend 0x0000000100ef954c performCompileStepsPostSILGen(swift::CompilerInstance&, std::_1::unique_ptr<swift::SILModule, std::_1::default_delete<swift::SILModule> >, llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>, swift::PrimarySpecificPaths const&, int&, swift::FrontendObserver*) + 3084

16 swift-frontend 0x0000000100eeb58c swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 5556

17 swift-frontend 0x0000000100e80460 main + 1136

18 libdyld.dylib 0x000000019cfc9450 start + 4

<unknown>:0: error: unable to execute command: Abort trap: 6

<unknown>:0: error: compile command failed due to signal 6 (use -v to see invocation)