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Public globals - #2
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For the moment, this field is ignored.
Restrict pointer event values to public global names. Update proofs accordingly. PowerPC and ARM need updating.
…lobal definitions). Assorted changes to ia32/Op.v. PowerPC and ARM need updating.
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Rebased on current master. |
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Proof of cc_asm_ref and cc_asm_compose
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As recently discussed on the compcert-users mailing list, this branch marks global definitions as either public (visible from the outside) or static (private to the compilation unit). Then, pointer values exchanged with the outside world (e.g. results of volatile read operations) are restricted to public global names.
This makes it possible to prove the correctness of compilation passes that add or remove static global definitions. As an application, this branch proves the correctness of the Unusedglob pass (removal of unreferenced static definitions), which was not verified before.