<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/64735>64735</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            llvm-mca reporting error on valid x86 assembly. 
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            bug,
            tools:llvm-mca
      </td>
    </tr>

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

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

<pre>
    ```asm
h:
 push    r14 
        push    rbx 
        push    rax 
 mov     r14, qword ptr [rdi]
        cmp     r14, qword ptr [rdi + 8]
 je      .LBB2_3
        mov     rbx, rdi 
.LBB2_2:
 mov     edi, dword ptr [r14]
        call    f(int)@PLT
        add r14, 4
        cmp     r14, qword ptr [rbx + 8]
        jne .LBB2_2
.LBB2_3:
        add     rsp, 8
        pop     rbx 
 pop     r14 
        ret
```


$ ./build/bin/llvm-mca -mtriple x86_64-unknown-linux-gnu -iterations=20 a.s


```sh
a.s:5:28: error: unexpected token in argument list
        mov     r14, qword ptr [rdi]
 ^
a.s:6:28: error: unexpected token in argument list
        cmp r14, qword ptr [rdi + 8]
                           ^
a.s:8:9: error: unknown use of instruction mnemonic without a size suffix
        mov rbx, rdi
        ^
a.s:10:28: error: unexpected token in argument list
        mov     edi, dword ptr [r14]
 ^
a.s:11:19: error: expected register here
        call f(int)@PLT
                  ^
a.s:12:9: error: unknown use of instruction mnemonic without a size suffix
        add     r14, 4
 ^
a.s:13:28: error: unexpected token in argument list
        cmp r14, qword ptr [rbx + 8]
                           ^
a.s:16:9: error: unknown use of instruction mnemonic without a size suffix
        add rsp, 8
        ^
a.s:1:1: error: symbol 'h' is already defined
h:
^
a.s:5:28: error: unexpected token in argument list
 mov     r14, qword ptr [rdi]
 ^
a.s:6:28: error: unexpected token in argument list
        cmp r14, qword ptr [rdi + 8]
                           ^
a.s:8:9: error: unknown use of instruction mnemonic without a size suffix
        mov rbx, rdi
        ^
a.s:9:1: error: symbol '.LBB2_2' is already defined
.LBB2_2:
^
a.s:10:28: error: unexpected token in argument list
        mov     edi, dword ptr [r14]
 ^
a.s:11:19: error: expected register here
        call f(int)@PLT
                  ^
a.s:12:9: error: unknown use of instruction mnemonic without a size suffix
        add     r14, 4
 ^
a.s:13:28: error: unexpected token in argument list
        cmp r14, qword ptr [rbx + 8]
                           ^
a.s:15:1: error: symbol '.LBB2_3' is already defined
.LBB2_3:
^
a.s:16:9: error: unknown use of instruction mnemonic without a size suffix
        add rsp, 8
        ^
```
 
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzsV01zozgT_jXi0mUXSAKbAwd7_Po0h_ew9ymBBCgjJFYfib2_fkv-jEkc79ZMai9R2YClVn88_ahpM-dkp4WoUL5G-SZhwffGVr20jEu_Z0lt-L5CRXr8MDegdIPSVY_I6vgEY3A9AIDNKJymTuOyUu_urbDLymCe4aQG4W_w54uxHEZvAeVryyXKN7cqmmH8SB4QXsPyuutJHLfNv6_X-Ae51XWxXe-irsP2g8BRGl-DPUsKLqMkv7Ga0bdeMqXivUV4KbVHuEQ0_f_3P26lGOfnOOi_iDLCehvlaTxpAWfXX8VBrnG8MnxQ78aofjnJkhlhkr_L1JtkW-GPExeynH6-vmIKc4S3dZCKx7vUCG-Veh5mQ8NgNngrRyVgtyx-FHQW9E9tXvRMSR12s04HmEkvLPPSaIfIBqfA5u4dM2cPXH-ciFJklSOywktEViCsNTY-BC12o2i84ODNT6FBamC2C4PQHpR0_g5PHnEU5f97bbn4ZcuRB_-Q6ffHxKvoUDlx6gA4BCfAtCC18zY0EW4YtBiMlg28SN-b4IGBk38JcKFt5e4tTNejdLs28SFLf1tSHh7JqeksXm4BuBi2opPOCwu9sOKdI_3xeb4LeYY_C_PLSb4tI1P75POYeLcaPWZiVnwmLO8Xt6kLp-_VA7cfaqMA4UWP8AKkA6asYHwPXLRSCz59E040_kK5-aozv7vOlB-k9_ym_CDJ0z7gq4p9VbG3sOQPSUYek4zcJdl_WSQnTR0kvCK8JCVLRJUVJc7KgmY06StC24zX2TKlGc3TJmtKjNO8EU2Tl4uGkERWOMUkXWZFRgkhdJ6TJSEtbfEiz_O2ThFNxcCkmse-cG5sl0jngqgKuiB5olgtlDv8XcG4Dh3CGOFvCGNvjIownbvJuJBvElsdJurQOUTTSAR3VeylV6K69J9WjMZ6qbsjwmA0PDMleexHgTknhlrt55AEq6re-zGaQ3iL8LaTvg_1vDHDqZ89t7WjNU-i8QhvD0E4hLeHOP4OAAD__zL2wvs">