[llvm] [mcp-frameinst: 1/3]: [MCP][NFC] Cleanup and prepare to preserve frame-setup/destroy (PR #186240)

[Scott Linder via llvm-commits]

slinder1 wrote:

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<summary>🛠️ Changes since last push (click to expand):</summary>

```diff

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</details>

https://github.com/llvm/llvm-project/pull/186240