<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/98113>98113</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Assertion `TFI->hasReservedCallFrame(MF) && "Cannot use SP to access the emergency spill slot in " "functions without a reserved call frame"' failed.
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            llvm:codegen,
            llvm:crash
      </td>
    </tr>

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

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

<pre>
    I'm debugging a crash that's happening in the Prologue/Epilogue Insertion & Frame Finalization backend with an assertion failure of the following: 
```
virtual bool llvm::ARMBaseRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator, int, unsigned int, RegScavenger *) const: Assertion `TFI->hasReservedCallFrame(MF) && "Cannot use SP to access the emergency spill slot in " "functions without a reserved call frame"' failed.
```

I'm able to reduce the crash to this [IR](https://gist.github.com/thevinster/8eed8d9ac10986b13d24866db874d4b3). Running `llc` on this file with `-O0` on this input crashes on both LLVM main and on release/18.x. 
</pre>
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