<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/150389>150389</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            How can I access DbgValueInst in LLVM Pass written by myself
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          enlist12
      </td>
    </tr>
</table>

<pre>
    I try to catch llvm.dbg.value instruction to get some valuable infomation.
The LLVM IR seems like:
```
; Function Attrs: mustprogress nofree nounwind willreturn memory(write, argmem: none, inaccessiblemem: readwrite) uwtable
define dso_local noalias noundef ptr @ttc(i32 noundef %c, i32 noundef %b) local_unnamed_addr #0 !dbg !30 {
entry:
    #dbg_value(i32 %c, !34, !DIExpression(), !37)
 #dbg_value(i32 %b, !35, !DIExpression(), !37)
  %call = tail call noalias dereferenceable_or_null(8) ptr @malloc(i64 noundef 8) #6, !dbg !38
 #dbg_value(ptr %call, !36, !DIExpression(), !37)
  store i32 %c, ptr %call, align 4, !dbg !39, !tbaa !40
  %b1 = getelementptr inbounds nuw i8, ptr %call, i64 4, !dbg !45
  store i32 %b, ptr %b1, align 4, !dbg !46, !tbaa !47
  ret ptr %call, !dbg !48
}
```
I want to catch  #dbg_value(i32 %c, !34, !DIExpression(), !37) and so on.
My code is:
```
for (auto &F : M)
 {
    if (F.isDeclaration() || F.getName().str() == "store_record" || F.getName().str() == "load_record")
      continue;
    for (auto &BB : F)
    {
      
      for (auto &I : BB)
      {

        if (I.isTerminator())
        {
          continue;
        }

        if (isa<DbgValueInst>(&I))
        {
          puts("aaaaaaaaaaaaaaaa");
 DbgValueInst *DVI = dyn_cast<DbgValueInst>(&I);
          Value *V = DVI->getValue();
          ValToDbgMap[V] = DVI;
          continue;
 }
```
However, I didn't get it.
Any help would be appreciated!!!
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJysVl1v6jgQ_TXmZVQU7ITAQx6gKbqRblerVcUrcuIheNexke2U5d-v7JCWpr27d6WLkPLhmXPOHHvscOdkqxELkm1JVs5470_GFqiVdH5BZ7UR16ICb6_gDTTcNydQ6rWbi7qdv3LVI0jtvO0bL40OMS16cKZDCKO8ViHgaDoexuck2bycEL5_3z9D9Qc4xM6Bkn8hYRuSbMgyuf2TDWFb2PV6wN14bx1hG-h658_WtBadA22OFhG06fVFagEXqZRF31sNHXbGXgldXaz0SOgjcNt22AUMbXR8IzVvGnRO1gpvQxa5uGWsob_4oJ8kG4FHqRGEMwdlGq5AG64kd5Fa4BHO3gJJE-8bQleS0bcBQrMmcn18Vwf8CHXoteYdigMXwgKhLAFCF6JuwyU85FuSbFB7ex08AoAQJur2EP2_EY5EISu93ZTV09_n4JQ0mtAVoesxIg_3yeYHQPUYlv00UOTnSgFhJXguFcSn0SeBFo9oUTcYLD0Ye9C9UoSuAthoX8eVMtHBZfrmVgwglC1vlKM1qy_0R5xByChw-fMlOG8swr2ZEzyuZKshnQgZgXzNebimyWhIvYh2tOgxrDDtA57UdajMge4vIFdf0ITqJyRp9llhfZdaL36oL11O9eURy6KfEt8lBXdJXk56soIL1_59J_g1CxG4FuAMDPvD8xUaIxCk-7wnHE3Qu-K9N0DocgehZ5_HtRw7JbSHDD222s2lK7FR3Ma9Z-AFkj-S_BF28xb9b7zD4fXceTsGsDJMGqE0un2w2BgrCKX_J1UZLt4zxwUWfo3RXuoeCRvVTorabmNVu_ek98IA3m4mWVVM2m7vqYa8t8fRl2ou3QvaTmrujR2nY30Xd0_4teYhqvwKXjpO2GNZt_uwKCrtPGFPkWVZ_SfTufcuxlI--d1sHBTcowOhm3JfxU4TV31oeGD8FwHsI2WMCiD7CFHuqwfCnlr0-9ui_jrnxZR1-8zPJNvuSVaOudPIiXWfW-qbueAr2tAPFQgpNKG5j4eo9KEdNvoKJ1RnuJheCagR-PlssZHcoyB0MfxnomBizdZ8hsUizxhLlwlLZqdicaSCU5rSJaV8RQUTKPiCJSxf1lnO6UwWNKFZktM0WTGWJfOGYZPni5zXKc2XdEHSBDsu1Twe-8a2M-lcj8UiS9hqPVO8RuXi5wOlGi8QR8NsZeXMFiHpoe5bR9IkfFK4dxgvvcLim7lAwzVUMBzGH-dW6uFb4XfuHISD2aOG-grd1aE6znqripP357hV0B2hu1b6U1_PG9MRugtUt8vD2Zo_sfGE7qJAR-juVsFrQf8JAAD__-7XkCk">