<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/107547>107547</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [llvm] [SimplifyCFG] 
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          dongjianqiang2
      </td>
    </tr>
</table>

<pre>
    system_status.h
`
#ifndef SYSTEM_STATUS_H
#define SYSTEM_STATUS_H

#include <stdint.h>

#define SUCCESS 0
#define FAILURE 1

#define MAX_SYSTEM_UNITS (15)

typedef uint8_t flag_t;

typedef struct {
    int status_health;
    int status_active;
} system_status_t;

typedef uint32_t unit_id_t;

typedef struct tagSYSTEM_UNIT {
    uint32_t category;
    unit_id_t unitId;
 int status_health;
    int status_active;
    char unitName[32];
} SYSTEM_UNIT;

typedef struct tagSYSTEM_COLLECTION {
    uint32_t unitCount;
    SYSTEM_UNIT unitArray[MAX_SYSTEM_UNITS];
} SYSTEM_COLLECTION;

// Function declaration for updateSystemStatus
int32_t updateSystemStatus(uint32_t collectionId);

// Declarations for external dependencies
SYSTEM_COLLECTION* getCollectionById(uint32_t collectionId);
void processUnit(unit_id_t unitId, system_status_t* status);
uint32_t getActiveStateAlert(uint32_t activeState);
`
system_status.c
`
#include "system_status.h"
#include <stdio.h>

// Definition of updateSystemStatus function
int32_t updateSystemStatus(uint32_t collectionId)
{
    uint32_t i;
    system_status_t systemStatus[MAX_SYSTEM_UNITS];
    unit_id_t unitArray[MAX_SYSTEM_UNITS] = { 0 };
    uint32_t unitCount;
    SYSTEM_COLLECTION* collectionInfo = NULL;

    collectionInfo = getCollectionById(collectionId);
 if (collectionInfo == NULL) {
        return FAILURE;
    }

 unitCount = collectionInfo->unitCount;
    for (i = 0; i < unitCount; i++) {
        unitArray[i] = collectionInfo->unitArray[i].unitId;
 }

    for (i = 0; i < unitCount; i++) {
 processUnit(unitArray[i], &systemStatus[i]);
    }

    return getActiveStateAlert(systemStatus[0].status_active);
}
`
main.c
`
#include "system_status.h"
#include <stdio.h>
#include <string.h>

// Mock function to return system collection information by ID
SYSTEM_COLLECTION* getCollectionById(uint32_t collectionId)
{
 static SYSTEM_COLLECTION systemCollection;
    systemCollection.unitCount = 0;
    return &systemCollection;
}

// Mock function to process each unit and update its status
void processUnit(unit_id_t unitId, system_status_t* status)
{
    printf("Processing unit with ID: %u\n", unitId);
    status->status_health = 100 - (unitId * 10);
 status->status_active = (unitId % 2);
}

// Mock function to check system active status crisis
uint32_t getActiveStateAlert(uint32_t activeState)
{
    if (activeState == 0) {
        printf("Alert: The system is not active!\n");
        return FAILURE;
    } else {
        printf("System is running normally.\n");
        return SUCCESS;
    }
}

// Main function to demonstrate the use of updateSystemStatus
int main()
{
    uint32_t collectionId = 1;
 int32_t result = updateSystemStatus(collectionId);

    if (result == SUCCESS) {
        printf("System status updated successfully.\n");
 } else {
        printf("Failed to update system status.\n");
 }

    return 0;
}
`
clang system_status.c main.c -O2 -fno-tree-vectorize
./a.out
`Segmentation fault (core dumped)`
gcc system_status.c main.c -O2 -fno-tree-vectorize
./a.out
`System is running normally.
System status updated successfully.
`
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJy0WFuP4jYU_jXm5QgUHMLlgQcuQ4s0O1uVQWqfkElOEu8Gh9rObOmvr-xcSEJgRt3paKTJcOzznct3PjswpXgkEOfEWxJv3WOZjlM5D1IRfeNM_MWZiGjvmAaXuboojaeD0kxnahATZ02cBRk7xQN1eSgCDGH35-716cth97p43e8Ov1bmAEMu8I658iH8JAsQiLtSOuBCD2LiPrUWlZ72q9XTbgdO27BZbJ_3vz_BsHvfl8UfhyKK_cv2dQeEToceobP6cn05o8km40JPDxrChEUHTdxl1yKlZeZrIJPCCgDAhYa8VocYWaLjam_LynzN3_DqebKGRqnvoprQXHrQkAmuDzx4LzzNolrazWgrXz7TGKXy0oi2ArBP2-Bq_K9ZGqsfM2kdvrATEm_pUuKtG3WohfvR1FZfn5-fVq_bry93EjSAqzQTuhFLvTBmxUJKdiHess2VOxFeUVtxErohdAObTPiapwIC9BMmmX0OUwnZOWAad7bfO1upfF8V7a2dTq_NSpMEreNtYPjbib2-QiqLiX9rlIIlEOAZRYDC51jA3qZDFxChXlVAy4uBej-Et5QHcJapj0rtBddmT5tFdHXDdLooCFP3VYFFqBeWR6YUuEhQ6nos7GprVKPUqKaC-R0KVqoPpW21o_SeRqUdElUUPuSC21anYUcnISxY8TMtL5jYxXTeYHir0sX_BcBjot9KwIPxAOKuzeiBA2TS8vGhGWySr5avCFPr_GX__NyiupWT25VdzL1HWOAhNM2FlwqSzpqSYn4k6kyK8sRppGOyr4dYJW1Da-L0ifvUXRQzsIROud3kEHcJ5nHVKCFwQpf2tyPCert42Z9u9PqyQVvp2-n8VGy3wlDHNsJA6LjF0Nwye1jja0e6paLl0jGJNg-oum5UzkuJODEu_h_daFklF9E9WfmS-t8r6QCdlhnnyLXWAhdhKk_5YXO8wHb9WSLfEh2TLPdv57cI6eq3Q5CuxkFzQJzG4iLHihUdPltcuFetgnqAzI8tU4GJoBBd4FqV58-nnWK3Cn2WXOiQ0Cmh9LfcORdRHswPrmPTKXcBhHoZ8VbCcIiuKrjmBOQ4ZoIb1zBbwqHjQB-KmLcBmLiGTsPDzfZ8DHIRr230gHaPxsNa-zH630tiFp5zHPAlV1z91Pl-W9hcwmvLSv12OqWx3occzF3Aa4xlxFyBSEtYQodVM5oteP8cAEwUPsbfVZAyE8LQQZjZTZLL4H3Y4k3ojjR294px0ehVgKdUKC1N1XSMkCnsvrZUtxUwcmijf3gNqYtHTsvG64NdI1FlST73ndefxxfda-uvfoyrsizv9b6ofcHMPIAAVOabyQyzez34WGM3jCcYmAoXGqPqaPcc3znVnAeHk58wEUHrjgv5kQX9rxT6oUj7WiL239DXqeT_YL5zQOiGDdJMVx53GJ1Q6OI9hdmami5IhCA7ndE2oQSOfP-zYB8MQX50faBTpbNeMHeDmTtjPZwPJ9QbD0fOzOnFc4aTIKCOMwudMByNh8fh6Oh4OGLByJ2yKevxOXWoWTx2ZsOR5wymMzfwQ3Z0xrPRmM6OZOTgifFkkCRvp0Eqox5XKsP50Jl4o0kvYUdMlP1KhVKBP8BaTZe9dU_Ozab-MYsUGTkJV1pd3WiuE_tdjPnEXta85Y6fzgkPL6vNL-aTXiaTeaz1WRG3GOaI6zg7Dvz0ROjG7sz_9M8y_Ya-JnRjI1CEbooQ3-b03wAAAP__PWhu1w">