Crash in constant propagation

[Axel-Reactor]

This is nonsensical test code from internal code gen testing, but I reliably crash with this:

#version 460

struct TYPE_QBmQRbmlpcTGbHxh { uint32_t variant; };
bool operator==(TYPE_QBmQRbmlpcTGbHxh lhs, TYPE_QBmQRbmlpcTGbHxh rhs) { return lhs.variant == rhs.variant; }
const TYPE_QBmQRbmlpcTGbHxh TYPE_kxUyNIzptPXewEJs = TYPE_QBmQRbmlpcTGbHxh(0);
const TYPE_QBmQRbmlpcTGbHxh TYPE_JLGyglBSdGSCICTU = TYPE_QBmQRbmlpcTGbHxh(1);
const TYPE_QBmQRbmlpcTGbHxh TYPE_ASIGaEGzVWSeCIec = TYPE_QBmQRbmlpcTGbHxh(2);

struct TYPE_eyQZDoMvVLZElrDX {
    vector<float32_t, 4> m_ujigZxHKbJHSjjnn;
    vector<float32_t, 4> m_ICCAonGNzdVjdlFA;
};

struct TYPE_YFSaXGWERCxuTrrK {
    TYPE_QBmQRbmlpcTGbHxh m_mdQTHFyBjntnjvIN;
};

layout (scalar, set = 1, binding = 0) uniform UBO_Global {
   float64_t HREOIZIQbKUVImYu;
   int64_t TCQXdQpMJLfmpkBk;
   uint64_t BxMLeBcLoJtfhYSt;
   TYPE_QBmQRbmlpcTGbHxh qBiKxIBkevFdwQpf;
   float32_t NNcjGUneJoKLqabz;
   int32_t sGnohaMoeSNpKPid;
   uint32_t NBitKKiZyGtZUjVI;
   uint32_t wERQxwcenXQxjkLv;
   uint8_t sNZWJyWSVFVhBiIM;
} UNIFORMS_Global;
layout (set = 1, binding = 1) SamplerState BINDING_wizPzNhlwuWdxKiV;
layout (location = 0) in vector<float32_t, 2> BINDING_jishczyZNXwjphtt;
layout (location = 0) out vector<float32_t, 4> BINDING_AWsuafnviCutmiDT;
layout (location = 1) out vector<float32_t, 4> BINDING_pffaEcYwacxRzGLr;

[shader("fragment")] void main()
{
    uint32_t XWmYSYtNDXgIxFiI_2 = uint32_t((UNIFORMS_Global.NBitKKiZyGtZUjVI));
    vector<float32_t, 4> TEMP_3 = vector<float32_t, 4>(0);
    vector<float32_t, 4> jYnWAUjUEIobUMPT_4 = TEMP_3;
    TYPE_QBmQRbmlpcTGbHxh TEMP_5 = TYPE_kxUyNIzptPXewEJs;
    TYPE_YFSaXGWERCxuTrrK TEMP_6 = TYPE_YFSaXGWERCxuTrrK(TEMP_5);
    TYPE_YFSaXGWERCxuTrrK XNQfxLPytymSEvwe_7 = TEMP_6;
    float32_t TEMP_8 = float32_t(0);
    float32_t cGiZyVhuQNcOgcxk_9 = TEMP_8;
    const TYPE_QBmQRbmlpcTGbHxh TEMP_10 = (XNQfxLPytymSEvwe_7.m_mdQTHFyBjntnjvIN);
    if (((TEMP_10 == TYPE_kxUyNIzptPXewEJs)))
    {
        float32_t TEMP_11 = -1.0e0f;
        float32_t DsRDIOosmDXFXWnm_12 = TEMP_11;
        (cGiZyVhuQNcOgcxk_9 = DsRDIOosmDXFXWnm_12);
    }
    else
    {
        float32_t TEMP_13 = jYnWAUjUEIobUMPT_4.y;
        bool TEMP_14 = TEMP_13 < 1.0e1f;
        if ((TEMP_14) && ((TEMP_10 == TYPE_ASIGaEGzVWSeCIec) || (TEMP_10 == TYPE_JLGyglBSdGSCICTU)))
        {
            (cGiZyVhuQNcOgcxk_9 = 1.0e0f);
        }
        else
        {
            float32_t TEMP_15 = jYnWAUjUEIobUMPT_4.y;
            bool TEMP_16 = TEMP_15 > 1.0e1f;
            if ((TEMP_16) && ((TEMP_10 == TYPE_JLGyglBSdGSCICTU)))
            {
                (cGiZyVhuQNcOgcxk_9 = 0.0e0f);
            }
            else
            {
                if (true)
                {
                }
            }
        }
    }
    float32_t TEMP_17 = (BINDING_jishczyZNXwjphtt).x;
    float32_t TEMP_18 = (BINDING_jishczyZNXwjphtt).y;
    float32_t TEMP_19 = (BINDING_jishczyZNXwjphtt).x;
    float32_t TEMP_20 = jYnWAUjUEIobUMPT_4.w;
    float32_t TEMP_21 = TEMP_20 * cGiZyVhuQNcOgcxk_9;
    vector<float32_t, 4> TEMP_22 = vector<float32_t, 4>(TEMP_17, TEMP_18, TEMP_19, TEMP_21);
    vector<float32_t, 4> TEMP_23 = TEMP_22;
    vector<float32_t, 4> TEMP_24 = vector<float32_t, 4>(0);
    vector<float32_t, 4> TEMP_25 = TEMP_24;
    TYPE_eyQZDoMvVLZElrDX TEMP_26 = TYPE_eyQZDoMvVLZElrDX(TEMP_23, TEMP_25);
    TYPE_eyQZDoMvVLZElrDX TEMP_27 = TEMP_26;
    BINDING_AWsuafnviCutmiDT = TEMP_27.m_ujigZxHKbJHSjjnn;
    BINDING_pffaEcYwacxRzGLr = TEMP_27.m_ICCAonGNzdVjdlFA;
    return;
}

Crashes in

[slang.dll] Slang::SCCPContext::getLatticeVal(Slang::IRInst *) 0x00007ffca90f4622
[slang.dll] Slang::SCCPContext::updateValueForInst(Slang::IRInst *) 0x00007ffca90f7486
[slang.dll] Slang::SCCPContext::apply() 0x00007ffca90f833f
[slang.dll] Slang::applySparseConditionalConstantPropagationRec(const Slang::SCCPContext &,Slang::IRInst *) 0x00007ffca90f8bda
[slang.dll] Slang::applySparseConditionalConstantPropagation(Slang::IRInst *,Slang::DiagnosticSink *) 0x00007ffca90f95ce
[slang.dll] Slang::simplifyIR(Slang::TargetProgram *,Slang::IRModule *,IRSimplificationOptions,Slang::DiagnosticSink *) 0x00007ffca914ab2b
[slang.dll] Slang::linkAndOptimizeIR(Slang::CodeGenContext *,const Slang::LinkingAndOptimizationOptions &,Slang::LinkedIR &) 0x00007ffca8f2b05b
[slang.dll] Slang::emitSPIRVForEntryPointsDirectly(Slang::CodeGenContext *,Slang::ComPtr<Slang::IArtifact> &) 0x00007ffca8f2e3c3
[slang.dll] Slang::CodeGenContext::_emitEntryPoints(Slang::ComPtr<Slang::IArtifact> &) 0x00007ffca8e1d1a4
[slang.dll] Slang::CodeGenContext::emitEntryPoints(Slang::ComPtr<Slang::IArtifact> &) 0x00007ffca8e1d296
[slang.dll] Slang::TargetProgram::_createEntryPointResult(long long,Slang::DiagnosticSink *,Slang::EndToEndCompileRequest *) 0x00007ffca8e1e1d5
[slang.dll] Slang::ComponentType::getEntryPointCode(long long,long long,ISlangBlob **,ISlangBlob **) 0x00007ffca9365f09