[SPIR-V] Compilation error: generated SPIR-V is inva... | microsoft/DirectXShaderCompiler

Description

When building an hlsl file (for a vulkan compute shader) to spirv, I got an compiler error message:

fatal error: generated SPIR-V is invalid: Expected int scalar or vector type as operand: IAdd operand index 3
  %77 = OpIAdd %int %67 %75

No output spv file was generated.

Steps to Reproduce
My file on godbolt.org - produces the same crash.

Actual Behavior
On latest release (dxcompiler.dll: 1.9(5184-21d28f72)(1.9.2602.17) - 1.9.2602.17 (21d28f727)) of dxc I get this message:

fatal error: generated SPIR-V is invalid: Expected int scalar or vector type as operand: IAdd operand index 3
  %78 = OpIAdd %int %68 %76

On build of version dxcompiler.dll: 1.8 - 1.8.0.4575 (4f4bb4208) which was installed with vulkan SDK, I got segfault:

Internal compiler error: access violation. Attempted to read from address 0x0000000000000030

After running it under lldb I got this backtrace

* thread #1, stop reason = Exception 0xc0000005 encountered at address 0x7ffd5821b320: Access violation reading location 0x00000030
  * frame #0: 0x00007ffd5821b320 dxcompiler.dll`void spvtools::opt::AggressiveDCEPass::AddToWorklist(this=0x0000018ddae9d9b0, inst=0x0000000000000000) at aggressive_dead_code_elim_pass.h:93
    frame #1: 0x00007ffd582038bb dxcompiler.dll`bool std::_Func_impl_no_alloc<class <lambda_0deb3abbf969e53bb02ac7506598fb03>, bool, unsigned int const *>::_Do_call(this=<unavailable>, <_Args_0>=<unavailable>) at xmemory:905
    frame #2: 0x00007ffd5821c440 dxcompiler.dll`spvtools::opt::Instruction::WhileEachInId at functional:869 [inlined]
    frame #3: 0x00007ffd5821c3f7 dxcompiler.dll`void spvtools::opt::Instruction::ForEachInId(this=<unavailable>, f=<unavailable>) const at instruction.h:838
    frame #4: 0x00007ffd5821b1a8 dxcompiler.dll`void spvtools::opt::AggressiveDCEPass::AddOperandsToWorkList(this=0x0000018ddae9d9b0, inst=0x0000018ddaf05ce0) at aggressive_dead_code_elim_pass.cpp:514
    frame #5: 0x00007ffd58220087 dxcompiler.dll`void spvtools::opt::AggressiveDCEPass::ProcessWorkList(this=0x0000018ddae9d9b0, func=0x0000018ddaeb5fa0) at aggressive_dead_code_elim_pass.cpp:333
    frame #6: 0x00007ffd5821b961 dxcompiler.dll`bool spvtools::opt::AggressiveDCEPass::AggressiveDCE(this=0x0000018ddae9d9b0, func=0x0000018ddaeb5fa0) at aggressive_dead_code_elim_pass.cpp:269
    frame #7: 0x00007ffd5821f1e0 dxcompiler.dll`enum spvtools::opt::Pass::Status spvtools::opt::AggressiveDCEPass::Process(this=0x0000018ddae9d9b0) at aggressive_dead_code_elim_pass.cpp:682
    frame #8: 0x00007ffd5820e08d dxcompiler.dll`enum spvtools::opt::Pass::Status spvtools::opt::Pass::Run(this=0x0000018ddae9d9b0, ctx=0x0000018ddae9e210) at pass.cpp:37
    frame #9: 0x00007ffd5821831f dxcompiler.dll`enum spvtools::opt::Pass::Status spvtools::opt::PassManager::Run(this=0x0000018ddae9b078, context=<unavailable>) at pass_manager.cpp:58
    frame #10: 0x00007ffd5820057a dxcompiler.dll`bool spvtools::Optimizer::Run(this=0x000000823a58b250, original_binary=0x0000018ddae98300, original_binary_size=<unavailable>, optimized_binary=size=2891, opt_options=0x0000018ddae910c0) const at optimizer.cpp:684
    frame #11: 0x00007ffd5811566c dxcompiler.dll`bool clang::spirv::SpirvEmitter::spirvToolsLegalize(this=0x0000018dd956e5f0, mod=size=2891, messages=<unavailable>, dsetbindingsToCombineImageSampler=size=0) at SpirvEmitter.cpp:14447
    frame #12: 0x00007ffd580e1951 dxcompiler.dll`void clang::spirv::SpirvEmitter::HandleTranslationUnit(this=0x0000018dd956e5f0, context=0x0000018dd9557e90) at SpirvEmitter.cpp:902
    frame #13: 0x00007ffd58187e98 dxcompiler.dll`void clang::ParseAST(S=0x0000018dd9570e60, PrintStats=<unavailable>, SkipFunctionBodies=<unavailable>) at ParseAST.cpp:164
    frame #14: 0x00007ffd57b0c21f dxcompiler.dll`void clang::ASTFrontendAction::ExecuteAction(this=0x000000823a58cf30) at FrontendAction.cpp:554
    frame #15: 0x00007ffd57b0c16c dxcompiler.dll`bool clang::FrontendAction::Execute(this=0x000000823a58cf30) at FrontendAction.cpp:455
    frame #16: 0x00007ffd575972ca dxcompiler.dll`long DxcCompiler::Compile(this=0x00007ffde48b3900, pSource=0x0000018dd952c910, pArguments=0x0000018dd952c910, argCount=8, pIncludeHandler=0x0000018dd952ac90, riid=0x00007ffd585a0b78) at dxcompilerobj.cpp:973
    frame #17: 0x00007ffd5759f15c dxcompiler.dll`long hlsl::DxcCompilerAdapter::WrapCompile(this=<unavailable>, bPreprocess=<unavailable>, pSource=<unavailable>, pSourceName=unable to read data, pEntryPoint=<unavailable>, pTargetProfile=<unavailable>, pArguments=<unavailable>, argCount=<unavailable>, pDefines=<unavailable>, defineCount=<unavailable>, pIncludeHandler=<unavailable>, ppResult=<unavailable>, ppDebugBlobName=<unavailable>, ppDebugBlob=0x0000000000000000) at dxcompilerobj.cpp:1845
    frame #18: 0x00007ffd575998ff dxcompiler.dll`long hlsl::DxcCompilerAdapter::CompileWithDebug(this=0x0000018dd952ac40, pSource=0x0000018dd952bb00, pSourceName=L"kernel.hlsl", pEntryPoint=L"main", pTargetProfile=<unavailable>, pArguments=<unavailable>, argCount=978889776, pDefines=<unavailable>, defineCount=<unavailable>, pIncludeHandler=<unavailable>, ppResult=<unavailable>, ppDebugBlobName=<unavailable>, ppDebugBlob=<unavailable>) at dxcompilerobj.cpp:1748
    frame #19: 0x00007ffd575997f7 dxcompiler.dll`long hlsl::DxcCompilerAdapter::Compile(this=0x0000018dd952ac40, pSource=<unavailable>, pSourceName=<unavailable>, pEntryPoint=<unavailable>, pTargetProfile=<unavailable>, pArguments=<unavailable>, argCount=<unavailable>, pDefines=<unavailable>, defineCount=<unavailable>, pIncludeHandler=<unavailable>, ppResult=<unavailable>) at dxcompileradapter.h:75
    frame #20: 0x00007ff738e550a0 dxc.exe`int DxcContext::Compile(this=0x000000823a58f048) at xstring:2274
    frame #21: 0x00007ff738e5cd59 dxc.exe`int dxc::main(argc=978889776, argv_=<unavailable>) at dxc.cpp:1502
    frame #22: 0x00007ff738e6ce38 dxc.exe`__scrt_common_main_seh at exe_common.inl:288
    frame #23: 0x00007ffde2e7e8d7 kernel32.dll`BaseThreadInitThunk + 23
    frame #24: 0x00007ffde49ec3fc ntdll.dll`RtlUserThreadStart + 44

Environment

DXC version: dxcompiler.dll: 1.9(5184-21d28f72)(1.9.2602.17) - 1.9.2602.17 (21d28f727) / dxcompiler.dll: 1.8 - 1.8.0.4575 (4f4bb4208) / latest on godbolt.com (all them have this issue)
Host Operating System: Windows 26200.8246

[SPIR-V] Compilation error: generated SPIR-V is invalid.

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