[llvm] [RISCV] [MachineOutliner] Analyze all candidates (PR #127659)

[via llvm-commits]

llvmbot wrote:

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Failed to cherry-pick: [6757cf4](https://github.com/llvm/llvm-project/commit/6757cf4e6f1c7767d605e579930a24758c0778dc)

https://github.com/llvm/llvm-project/actions/runs/13452069337

Please manually backport the fix and push it to your github fork.  Once this is done, please create a [pull request](https://github.com/llvm/llvm-project/compare)

https://github.com/llvm/llvm-project/pull/127659