Adapt to the change in CompCert semantics between CompCert 3.7 and 3.8 - #857
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This P.R. adapts to AbsInt/CompCert@142fc76 |
andrew-appel
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in AbsInt/CompCert
Jun 9, 2026
Fail if the addressed bytes straddle the 2^32 or 2^64 boundary. This can happen for memory chunks where alignment is less than size, e.g. a 64-bit access 4-aligned at address 0xFFFF_FFFC on a 32-bit machine.
…values aligned on 4-byte multiples)
andrew-appel
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June 9, 2026 14:43
1. Use InteractionTrees from coq-released opam install, not submodule 2. Fix dry_mem_lemmas for recent Clight operational semantics change
andrew-appel
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The painful thing is a new restriction in CompCert's load and store semantics, that the offset must be <= Ptrofs.modulus. This requires preserving a new invariant.