https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112572
--- Comment #15 from Sam James <sjames at gcc dot gnu.org> ---
Looks like it's extractInstructionFeatures
(https://github.com/llvm/llvm-project/blob/llvmorg-17.0.5/llvm/lib/CodeGen/MLRegallocEvictAdvisor.cpp#L943).

Adding __attribute__((optimize("O0"))) to it makes the test pass.

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