[Bug] segfault when using clip

Description
This code is invalid. was generated via a code gen tool. The problem is we are segfaulting instead of failing with an error or asserting.

code:

[numthreads(1, 1, 1)]
[shader("pixel")]
void fn(float4 p1: SV_ViewID) : SV_Target {
    return clip(p1);
}

stack trace:

* thread #1, name = 'dxc', stop reason = signal SIGSEGV: address not mapped to object (fault address: 0x98)
  * frame #0: 0x00007ffff454686c libdxcompiler.so`llvm::Function::getFunctionType(this=0x0000000000000000) const at Function.cpp:227:58
    frame #1: 0x00007ffff46a61dd libdxcompiler.so`llvm::IRBuilder<true, llvm::ConstantFolder, llvm::IRBuilderDefaultInserter<true>>::CreateCall(this=0x00007fffffff73c0, Callee=0x0000000000000000, Args=ArrayRef<llvm::Value *> @ 0x00007fffffff6e10, Name=0x00007fffffff6f20) at IRBuilder.h:1530:31
    frame #2: 0x00007ffff49103b4 libdxcompiler.so`(anonymous namespace)::replaceInputOutputWithIntrinsic(semKind=ViewID, GV=0x0000555555a6e190, hlslOP=0x0000555555a21d60, Builder=0x00007fffffff73c0) at HLSignatureLower.cpp:189:22
    frame #3: 0x00007ffff490f67e libdxcompiler.so`hlsl::HLSignatureLower::ProcessArgument(this=0x00007fffffff7a48, func=0x0000555555a6d8f8, funcAnnotation=0x0000555555a6dbe0, arg=0x0000555555a6e190, props=0x0000555555a6dac0, pSM=0x00007ffff7dea268, isPatchConstantFunction=false, forceOut=false, hasClipPlane=0x00007fffffff77ff) at HLSignatureLower.cpp:367:7
    frame #4: 0x00007ffff4910e60 libdxcompiler.so`hlsl::HLSignatureLower::CreateDxilSignatures(this=0x00007fffffff7a48) at HLSignatureLower.cpp:478:5
    frame #5: 0x00007ffff4918f3b libdxcompiler.so`hlsl::HLSignatureLower::Run(this=0x00007fffffff7a48) at HLSignatureLower.cpp:1794:5
    frame #6: 0x00007ffff489f003 libdxcompiler.so`(anonymous namespace)::DxilGenerationPass::runOnModule(this=0x0000555555a959a0, M=0x0000555555a1a4d0) at DxilGenerationPass.cpp:240:22
    frame #7: 0x00007ffff679859d libdxcompiler.so`(anonymous namespace)::MPPassManager::runOnModule(this=0x0000555555a0e030, M=0x0000555555a1a4d0) at LegacyPassManager.cpp:1669:27
    frame #8: 0x00007ffff6798043 libdxcompiler.so`llvm::legacy::PassManagerImpl::run(this=0x0000555555a83120, M=0x0000555555a1a4d0) at LegacyPassManager.cpp:1771:44
    frame #9: 0x00007ffff6798c44 libdxcompiler.so`llvm::legacy::PassManager::run(this=0x0000555555a83090, M=0x0000555555a1a4d0) at LegacyPassManager.cpp:1814:14
    frame #10: 0x00007ffff4d7d540 libdxcompiler.so`(anonymous namespace)::EmitAssemblyHelper::EmitAssembly(this=0x00007fffffff8588, Action=Backend_EmitBC, OS=0x0000555555a19900) at BackendUtil.cpp:756:22
    frame #11: 0x00007ffff4d7c8be libdxcompiler.so`clang::EmitBackendOutput(Diags=0x00005555559dd940, CGOpts=0x00005555559dc400, TOpts=0x00005555559dd020, LOpts=0x00005555559dcea0, TDesc=(Data = "e-m:e-p:32:32-i1:32-i8:8-i16:16-i32:32-i64:64-f16:16-f32:32-f64:64-n8:16:32:64", Length = 78), M=0x0000555555a1a4d0, Action=Backend_EmitBC, OS=0x0000555555a19900) at BackendUtil.cpp:779:15
    frame #12: 0x00007ffff4d566b9 libdxcompiler.so`clang::BackendConsumer::HandleTranslationUnit(this=0x0000555555a19ab0, C=0x0000555555a03ac0) at CodeGenAction.cpp:191:7
    frame #13: 0x00007ffff62be484 libdxcompiler.so`clang::ParseAST(S=0x0000555555a1a790, PrintStats=false, SkipFunctionBodies=false) at ParseAST.cpp:164:13
    frame #14: 0x00007ffff50ff616 libdxcompiler.so`clang::ASTFrontendAction::ExecuteAction(this=0x00007fffffff9f00) at FrontendAction.cpp:554:3
    frame #15: 0x00007ffff4d54c31 libdxcompiler.so`clang::CodeGenAction::ExecuteAction(this=0x00007fffffff9f00) at CodeGenAction.cpp:807:28
    frame #16: 0x00007ffff50ff10c libdxcompiler.so`clang::FrontendAction::Execute(this=0x00007fffffff9f00) at FrontendAction.cpp:455:8
    frame #17: 0x00007ffff43e540a libdxcompiler.so`DxcCompiler::Compile(this=0x00005555559d99e0, pSource=0x00007fffffffc5a0, pArguments=0x00005555559d64f0, argCount=6, pIncludeHandler=0x00005555559d9590, riid=0x00005555557fd658, ppResult=0x00007fffffffba98) at dxcompilerobj.cpp:982:18
    frame #18: 0x00007ffff43d9dbd libdxcompiler.so`hlsl::DxcCompilerAdapter::WrapCompile(this=0x00005555559d9e00, bPreprocess=NO, pSource=0x00005555559d9fd0, pSourceName=L"scratch/clip_test.hlsl", pEntryPoint=L"lib.no::entry", pTargetProfile=L"lib_6_8", pArguments=0x00005555559d9570, argCount=3, pDefines=0x00007fffffffd1e8, defineCount=0, pIncludeHandler=0x00005555559d9590, ppResult=0x00007fffffffcda0, ppDebugBlobName=0x0000000000000000, ppDebugBlob=0x0000000000000000) at dxcompilerobj.cpp:1843:5
    frame #19: 0x00007ffff43db2ac libdxcompiler.so`hlsl::DxcCompilerAdapter::CompileWithDebug(this=0x00005555559d9e00, pSource=0x00005555559d9fd0, pSourceName=L"scratch/clip_test.hlsl", pEntryPoint=L"lib.no::entry", pTargetProfile=L"lib_6_8", pArguments=0x00005555559d9570, argCount=3, pDefines=0x00007fffffffd1e8, defineCount=0, pIncludeHandler=0x00005555559d9590, ppResult=0x00007fffffffcda0, ppDebugBlobName=0x0000000000000000, ppDebugBlob=0x0000000000000000) at dxcompilerobj.cpp:1746:10
    frame #20: 0x00007ffff43df066 libdxcompiler.so`hlsl::DxcCompilerAdapter::Compile(this=0x00005555559d9e00, pSource=0x00005555559d9fd0, pSourceName=L"scratch/clip_test.hlsl", pEntryPoint=L"lib.no::entry", pTargetProfile=L"lib_6_8", pArguments=0x00005555559d9570, argCount=3, pDefines=0x00007fffffffd1e8, defineCount=0, pIncludeHandler=0x00005555559d9590, ppResult=0x00007fffffffcda0) at dxcompileradapter.h:75:12
    frame #21: 0x00005555555c1c17 dxc`DxcContext::Compile(this=0x00007fffffffd048) at dxc.cpp:874:9
    frame #22: 0x00005555555c5db3 dxc`dxc::main(argc=5, argv_=0x00007fffffffdd28) at dxc.cpp:1502:24
    frame #23: 0x00005555555ba732 dxc`main(argc=5, argv_=0x00007fffffffdd28) at dxcmain.cpp:19:10
    frame #24: 0x00007ffff3a29d90 libc.so.6`__libc_start_call_main(main=(dxc`main at dxcmain.cpp:18), argc=5, argv=0x00007fffffffdd28) at libc_start_call_main.h:58:16
    frame #25: 0x00007ffff3a29e40 libc.so.6`__libc_start_main_impl(main=(dxc`main at dxcmain.cpp:18), argc=5, argv=0x00007fffffffdd28, init=<unavailable>, fini=<unavailable>, rtld_fini=<unavailable>, stack_end=0x00007fffffffdd18) at libc-start.c:392:3
    frame #26: 0x00005555555ba645 dxc`_start + 37

Steps to Reproduce
commands I used were
dxc scratch/clip_test.hlsl -T lib_6_8 -enable-16bit-types

Environment

• DXC version: commit id: e7b78ff9c99c19a6a0c98256db9794e0af4eb59d
• Host Operating System: Ubuntu 22.04

Start by reproducing the crash with dxc scratch/clip_test.hlsl -T lib_6_8 -enable-16bit-types, then inspect HLSignatureLower.cpp at replaceInputOutputWithIntrinsic and the surrounding signature-lowering flow named in the stack trace. Done means this invalid shader no longer segfaults and instead fails with an error or assertion.