<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/97673>97673</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [assemble] clang doesn't accept the operand %1
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang
      </td>
    </tr>

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

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

<pre>
    * test: https://gcc.godbolt.org/z/e1c1qMTTM
```
void _mcount(uint64_t caller_ra){
        uint64_t rbp=0;
        uint64_t rsp=0;
        __asm__ __volatile__("mov x0, fp\n"
                         "mov %1, sp \n"
                         :"=g"(rbp),"=g"(rsp)       
 :); 
        
        printf("rbp = 0x%llx , rsp=0x%llx\n" , rbp , rsp);
}
```

I except the register value **sp** will be saved in local variable **rsp**. But it is only accept by gcc

* error reported by clang:
```
<source>:9:27: error: invalid operand for instruction
    9 |                          "mov %1, sp \n"
```
</pre>
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